merge

.gitignore

@@ -16,6 +16,10 @@ __pycache__
 # PyCharm files
 .idea
 
+#Virtual Env Files
+Pipfile
+Pipfile.lock
+
 # Docs
 /docs/output
 /docs/rst_files

cmake/CMakeLists.txt

@@ -23,7 +23,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)  # not necessary, but encouraged
 
 project (IfcOpenShell VERSION 0.6.0)
 
-# use extra version to make pre-release using eg semver 
+# use extra version to make pre-release using eg semver
 set( EXTRA_VERSION "-alpha.3")
 
 foreach(max_year RANGE 2014 2030)
@@ -280,7 +280,7 @@ ENDIF()
 # Use the found libTKernel as a template for all other OCC libraries
 # TODO Extract this into macro/function
 foreach(lib ${OPENCASCADE_LIBRARY_NAMES})
-    # Make sure we'll handle the Windows/MSVC debug postfix convetion too.
+    # Make sure we'll handle the Windows/MSVC debug postfix convention too.
     string(REPLACE TKerneld "${lib}" lib_path "${libTKernel}")
     string(REPLACE TKernel "${lib}" lib_path "${lib_path}")
 	list(APPEND OPENCASCADE_LIBRARIES "${lib_path}")
@@ -355,7 +355,7 @@ IF(COLLADA_SUPPORT AND BUILD_CONVERT)
 
 		# Use the found OpenCOLLADAFramework as a template for all other OpenCOLLADA libraries
 		foreach(lib ${OPENCOLLADA_LIBRARY_NAMES})
-            # Make sure we'll handle the Windows/MSVC debug postfix convetion too.
+            # Make sure we'll handle the Windows/MSVC debug postfix convention too.
             string(REPLACE OpenCOLLADAFrameworkd "${lib}" lib_path "${OpenCOLLADAFramework}")
             string(REPLACE OpenCOLLADAFramework "${lib}" lib_path "${lib_path}")
  			list(APPEND OPENCOLLADA_LIBRARIES "${lib_path}")
@@ -441,7 +441,7 @@ IF(MSVC)
 		# Disable overeager and false positives causing C4458 ("declaration of 'indentifier' hides class member"), at least for now.
 		ADD_DEFINITIONS(-wd4458)
 	ENDIF()
-    # Enforce standards-conformance on VS > 2015, older Boost versions fail to compile with this    
+    # Enforce standards-conformance on VS > 2015, older Boost versions fail to compile with this
     if (MSVC_VERSION GREATER 1900 AND (Boost_MAJOR_VERSION GREATER 1 OR Boost_MINOR_VERSION GREATER 66))
         add_definitions(-permissive-)
     endif()
@@ -486,8 +486,8 @@ INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES} ${OCC_INCLUDE_DIR} ${OPENCOLLADA_INCL
 
 function(files_for_ifc_version IFC_VERSION RESULT_NAME)
     set(IFC_PARSE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../src/ifcparse)
-    set(${RESULT_NAME} 
-        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.h 
+    set(${RESULT_NAME}
+        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.h
         ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}enum.h
         ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.cpp
 		PARENT_SCOPE
@@ -496,17 +496,21 @@ endfunction()
 
 set(SCHEMA_VERSIONS "2x3" "4" "4x1" "4x2" "4x3_rc1" "4x3_rc2")
 
+foreach(s ${SCHEMA_VERSIONS})
+	add_definitions(-DHAS_SCHEMA_${s})
+endforeach()
+
 if(COMPILE_SCHEMA)
 	# @todo, this appears to be untested at the moment
 
     find_package(PythonInterp)
-    
+
     IF(NOT PYTHONINTERP_FOUND)
         MESSAGE(FATAL_ERROR "A Python interpreter is necessary when COMPILE_SCHEMA is enabled. Disable COMPILE_SCHEMA or fix Python paths to proceed.")
     ENDIF()
-    
+
     set(IFC_RELEASE_NOT_USED ${SCHEMA_VERSIONS})
-    
+
     # Install pyparsing if necessary
     execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip freeze OUTPUT_VARIABLE PYTHON_PACKAGE_LIST)
     if ("${PYTHON_PACKAGE_LIST}" STREQUAL "")
@@ -528,23 +532,23 @@ if(COMPILE_SCHEMA)
     else()
         message(STATUS "Python interpreter with pyparsing found")
     endif()
-    
+
     # Bootstrap the parser
     message(STATUS "Compiling schema, this will take a while...")
-    execute_process(COMMAND ${PYTHON_EXECUTABLE} bootstrap.py express.bnf 
-        WORKING_DIRECTORY ../src/ifcexpressparser 
+    execute_process(COMMAND ${PYTHON_EXECUTABLE} bootstrap.py express.bnf
+        WORKING_DIRECTORY ../src/ifcexpressparser
         OUTPUT_FILE express_parser.py
         RESULT_VARIABLE SUCCESS)
 
     if (NOT "${SUCCESS}" STREQUAL "0")
         MESSAGE(FATAL_ERROR "Failed to bootstrap parser. Make sure pyparsing is installed")
     endif()
-        
+
     # Generate code
     execute_process(COMMAND ${PYTHON_EXECUTABLE} ../ifcexpressparser/express_parser.py ../../${COMPILE_SCHEMA}
         WORKING_DIRECTORY ../src/ifcparse
         OUTPUT_VARIABLE COMPILED_SCHEMA_NAME)
-    
+
     # Prevent the schema that had just been compiled from being excluded
 	foreach(s ${SCHEMA_VERSIONS})
 		if("${COMPILED_SCHEMA_NAME}" STREQUAL "${s}")
@@ -573,8 +577,35 @@ if (BUILD_CONVERT)
 endif()
 
 # IfcParse
-file(GLOB IFCPARSE_H_FILES ../src/ifcparse/*.h)
-file(GLOB IFCPARSE_CPP_FILES ../src/ifcparse/*.cpp)
+file(GLOB IFCPARSE_H_FILES_ALL ../src/ifcparse/*.h)
+file(GLOB IFCPARSE_CPP_FILES_ALL ../src/ifcparse/*.cpp)
+
+foreach(s ${IFCPARSE_H_FILES_ALL})
+get_filename_component(p "${s}" NAME)
+if (NOT "${p}" MATCHES "[0-9]")
+list(APPEND IFCPARSE_H_FILES "${s}")
+endif()
+endforeach()
+
+foreach(s ${IFCPARSE_CPP_FILES_ALL})
+get_filename_component(p "${s}" NAME)
+if (NOT "${p}" MATCHES "[0-9]")
+list(APPEND IFCPARSE_CPP_FILES "${s}")
+endif()
+endforeach()
+
+foreach(s ${SCHEMA_VERSIONS})
+	list(APPEND IFCPARSE_H_FILES
+		../src/ifcparse/Ifc${s}.h
+		../src/ifcparse/Ifc${s}-definitions.h
+	)
+	list(APPEND IFCPARSE_CPP_FILES
+		../src/ifcparse/Ifc${s}.cpp
+		../src/ifcparse/Ifc${s}-schema.cpp
+	)
+endforeach()
+
+
 set(IFCPARSE_FILES ${IFCPARSE_CPP_FILES} ${IFCPARSE_H_FILES})
 
 add_library(IfcParse ${IFCPARSE_FILES})
@@ -607,7 +638,7 @@ if (UNIX)
 find_package(Threads)
 endif()
 
-TARGET_LINK_LIBRARIES(IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
+TARGET_LINK_LIBRARIES(IfcGeom IfcParse ${IFCGEOM_SCHEMA_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 
 endif(BUILD_IFCGEOM)
 
@@ -677,7 +708,7 @@ INSTALL(TARGETS IfcGeomServer
 
 endif()
 
-# Documentation	
+# Documentation
 IF(BUILD_DOCUMENTATION)
 	set(CMAKE_MODULE_PATH "../docs/cmake")
 	ADD_SUBDIRECTORY(../docs docs)
@@ -696,7 +727,7 @@ IF(BUILD_IFCMAX)
 ENDIF()
 
 # CMake installation targets
-INSTALL(FILES ${IFCPARSE_H_FILES} 
+INSTALL(FILES ${IFCPARSE_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcparse
 )
 
@@ -707,11 +738,11 @@ INSTALL(TARGETS IfcParse
 )
 
 if(BUILD_IFCGEOM)
-INSTALL(FILES ${IFCGEOM_H_FILES} 
+INSTALL(FILES ${IFCGEOM_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcgeom
 )
 
-INSTALL(FILES  ${SCHEMA_AGNOSTIC_H_FILES} 
+INSTALL(FILES  ${SCHEMA_AGNOSTIC_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcgeom_schema_agnostic
 )
 

nix/build-all.py

@@ -82,11 +82,11 @@ PROJECT_NAME="IfcOpenShell"
 PYTHON_VERSIONS=["2.7.16", "3.2.6", "3.3.6", "3.4.6", "3.5.3", "3.6.2", "3.7.3", "3.8.6", "3.9.1"]
 JSON_VERSION="v3.6.1"
 OCE_VERSION="0.18"
-OCCT_VERSION="master"
+# OCCT_VERSION="7.1.0"
 # OCCT_HASH="89aebde"
 # OCCT_VERSION="7.2.0"
 # OCCT_HASH="88af392"
-#OCCT_VERSION="7.5.0"
+OCCT_VERSION="7.3.0p3"
 BOOST_VERSION="1.71.0"
 #PCRE_VERSION="8.39"
 PCRE_VERSION="8.41"
@@ -310,7 +310,7 @@ def run(cmds, cwd=None):
 BOOST_VERSION_UNDERSCORE=BOOST_VERSION.replace(".", "_")
 
 OCE_LOCATION="https://github.com/tpaviot/oce/archive/OCE-%s.tar.gz" % (OCE_VERSION,)
-BOOST_LOCATION="https://dl.bintray.com/boostorg/release/%s/source/" % (BOOST_VERSION,)
+BOOST_LOCATION="https://boostorg.jfrog.io/artifactory/main/release/%s/source/" % (BOOST_VERSION,)
 
 # Helper functions
 
@@ -494,7 +494,7 @@ os.environ["LDFLAGS"] = LDFLAGS
 # build_dependency(name="cmake-%s" % (CMAKE_VERSION,), mode="autoconf", build_tool_args=[], download_url="https://cmake.org/files/v%s" % (CMAKE_VERSION_2,), download_name="cmake-%s.tar.gz" % (CMAKE_VERSION,))
 
 if "json" in targets:
-    json_url = "http://121.36.151.68:9008/download/json/v3.6.1/json.hpp".format(**locals())
+    json_url = "https://github.com/nlohmann/json/releases/download/{JSON_VERSION}/json.hpp".format(**locals())
     json_install_path = "{DEPS_DIR}/install/json/nlohmann/json.hpp".format(**locals())
     if not os.path.exists(os.path.dirname(json_install_path)):
         os.makedirs(os.path.dirname(json_install_path))
@@ -506,7 +506,7 @@ if "pcre" in targets:
         name="pcre-{PCRE_VERSION}".format(**locals()),
         mode="autoconf",
         build_tool_args=[DISABLE_FLAG],
-        download_url="http://121.36.151.68:9008/download/pcre/8.41/".format(**locals()),
+        download_url="https://downloads.sourceforge.net/project/pcre/pcre/{PCRE_VERSION}/".format(**locals()),
         download_name="pcre-{PCRE_VERSION}.tar.bz2".format(**locals())
     )
 
@@ -533,7 +533,7 @@ if USE_OCCT and "occ" in targets:
             "-DBUILD_MODULE_Draw=0",
             "-DBUILD_RELEASE_DISABLE_EXCEPTIONS=Off"
         ],
-        download_url = "http://47.92.33.33:8080/gitserver/r/occt.git",
+        download_url = "https://git.dev.opencascade.org/repos/occt.git",
         download_name = "occt",
         download_tool=download_tool_git,
         patch=None if OCCT_VERSION >= "7.4" else "./patches/occt/enable-exception-handling.patch",
@@ -620,7 +620,7 @@ if "python" in targets:
                 "python-{PYTHON_VERSION}{abi_tag}".format(**locals()),
                 "autoconf",
                 PYTHON_CONFIGURE_ARGS + [unicode_conf],
-                "http://121.36.151.68:9008/download/python/{PYTHON_VERSION}/".format(**locals()),
+                "http://www.python.org/ftp/python/{PYTHON_VERSION}/".format(**locals()),
                 "Python-{PYTHON_VERSION}.tgz".format(**locals())
             )
         except Exception as e:

src/bcf/README.md

@@ -4,23 +4,26 @@ A simple Python implementation of BCF. The data model is described in `data.py`.
 Manipulation of BCF-XML is available via `bcfxml.py` and manipulation of BCF-API
 is available via `bcfapi.py`.
 
-Currently supports BCF version 2.1.
+ - BCF-XML version 2.1: Fully supported
+ - BCF-API version 2.1: Not supported, will probably tackle this after BCF-API v3.0
+ - BCF-XML version 3.0: Almost fully supported, except for the documents module
+ - BCF-API version 3.0: Not supported, but work underway to support it
 
 ## bcfxml
 
 The `bcfxml` module lets you interact with the BCF-XML standard.
 
 ```
-from bcf.bcfxml import BcfXml
+from bcf import bcfxml
 
-bcfxml = BcfXml()
 
 # Load a project
-project = bcfxml.get_project("/path/to/file.bcf")
+bcfxml = bcfxml.load("/path/to/file.bcf")
+
 
 # The project is also stored in the module
 # project == bcfxml.project
-
+project=bcfxml.get_project()
 print(project.name)
 
 # To edit a project, just modify the object directly

src/bcf/bcf/bcfxml.py

@@ -1,765 +1,39 @@
-import os
-import uuid
-import shutil
+import os.path
 import zipfile
-import logging
 import tempfile
-import bcf.data
-from datetime import datetime
 from xml.dom import minidom
-from xmlschema import XMLSchema
-from contextlib import contextmanager
-from shutil import copyfile
 
 
-cwd = os.path.dirname(os.path.realpath(__file__))
+def load(filepath):
+    filepath = extract_project(filepath)
+    if os.path.isfile(os.path.join(filepath, "bcf.version")):
+        version_path = os.path.join(filepath, "bcf.version")
+        version_id = get_version(version_path)
+        if version_id == "2.1":
+            from bcf.v2.bcfxml import BcfXml
 
-
-@contextmanager
-def cd(newdir):
-    prevdir = os.getcwd()
-    os.chdir(os.path.expanduser(newdir))
-    try:
-        yield
-    finally:
-        os.chdir(prevdir)
-
-
-class BcfXml:
-    def __init__(self):
-        self.filepath = None
-        self.logger = logging.getLogger("bcfxml")
-        self.author = "john@doe.com"
-        self.project = bcf.data.Project()
-        self.version = "2.1"
-        self.topics = {}
-
-    def new_project(self):
-        self.project.project_id = str(uuid.uuid4())
-        self.project.name = "New Project"
-        self.topics = {}
-        if self.filepath:
-            self.close_project()
-        self.filepath = tempfile.mkdtemp()
-        self.edit_project()
-        self.edit_version()
-
-    def get_project(self, filepath=None):
-        if not filepath:
-            return self.project
-        zip_file = zipfile.ZipFile(filepath)
-        self.filepath = tempfile.mkdtemp()
-        zip_file.extractall(self.filepath)
-        if os.path.isfile(os.path.join(self.filepath, "project.bcfp")):
-            data = self._read_xml("project.bcfp", "project.xsd")
-            self.project.extension_schema = data["ExtensionSchema"]
-            if "Project" in data:
-                self.project.project_id = data["Project"]["@ProjectId"]
-                self.project.name = data["Project"].get("Name")
-        return self.project
-
-    def edit_project(self):
-        self.document = minidom.Document()
-        root = self._create_element(self.document, "ProjectExtension")
-        project = self._create_element(root, "Project", {"ProjectId": self.project.project_id})
-        self._create_element(project, "Name", text=self.project.name)
-        self._create_element(root, "ExtensionSchema", text="extensions.xsd")
-        with open(os.path.join(self.filepath, "project.bcfp"), "wb") as f:
-            f.write(self.document.toprettyxml(encoding="utf-8"))
-
-    def save_project(self, filepath):
-        with cd(self.filepath):
-            zip_file = zipfile.ZipFile(filepath, "w", zipfile.ZIP_DEFLATED)
-            for root, dirs, files in os.walk("./"):
-                for file in files:
-                    zip_file.write(os.path.join(root, file))
-            zip_file.close()
-
-    def get_version(self):
-        data = self._read_xml("bcf.version", "version.xsd")
-        self.version = data["@VersionId"]
-        return self.version
-
-    def edit_version(self):
-        self.document = minidom.Document()
-        root = self._create_element(self.document, "Version", {"VersionId": self.version})
-        version = self._create_element(root, "DetailedVersion", text=self.version)
-        with open(os.path.join(self.filepath, "bcf.version"), "wb") as f:
-            f.write(self.document.toprettyxml(encoding="utf-8"))
-
-    def get_topics(self):
-        self.topics = {}
-        topics = []
-        subdirs = []
-        for (dirpath, dirnames, filenames) in os.walk(self.filepath):
-            subdirs = dirnames
-            break
-        for subdir in subdirs:
-            self.topics[subdir] = self.get_topic(subdir)
-        return self.topics
-
-    def get_header(self, guid):
-        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
-        if "Header" not in data:
-            return
-        header = bcf.data.Header()
-        for item in data["Header"]["File"]:
-            header_file = bcf.data.HeaderFile()
-            optional_keys = {
-                "filename": "Filename",
-                "date": "Date",
-                "reference": "Reference",
-                "ifc_project": "@IfcProject",
-                "ifc_spatial_structure_element": "@IfcSpatialStructureElement",
-                "is_external": "@isExternal",
-            }
-            for key, value in optional_keys.items():
-                if value in item:
-                    setattr(header_file, key, item[value])
-            header.files.append(header_file)
-        self.topics[guid].header = header
-        return header
-
-    def get_topic(self, guid):
-        if guid in self.topics:
-            return self.topics[guid]
-        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
-        topic = bcf.data.Topic()
-        self.topics[guid] = topic
-
-        mandatory_keys = {
-            "guid": "@Guid",
-            "title": "Title",
-            "creation_date": "CreationDate",
-            "creation_author": "CreationAuthor",
-        }
-        for key, value in mandatory_keys.items():
-            setattr(topic, key, data["Topic"][value])
-
-        optional_keys = {
-            "priority": "Priority",
-            "index": "Index",
-            "labels": "Labels",
-            "reference_links": "ReferenceLink",
-            "modified_date": "ModifiedDate",
-            "modified_author": "ModifiedAuthor",
-            "due_date": "DueDate",
-            "assigned_to": "AssignedTo",
-            "stage": "Stage",
-            "description": "Description",
-            "topic_status": "@TopicStatus",
-            "topic_type": "@TopicType",
-        }
-        for key, value in optional_keys.items():
-            if value in data["Topic"]:
-                setattr(topic, key, data["Topic"][value])
-
-        if "BimSnippet" in data["Topic"]:
-            bim_snippet = bcf.data.BimSnippet()
-            keys = {
-                "snippet_type": "@SnippetType",
-                "is_external": "@IsExternal",
-                "reference": "Reference",
-                "reference_schema": "ReferenceSchema",
-            }
-            for key, value in keys.items():
-                if value in data["Topic"]["BimSnippet"]:
-                    setattr(bim_snippet, key, data["Topic"]["BimSnippet"][value])
-            topic.bim_snippet = bim_snippet
-
-        if "DocumentReference" in data["Topic"]:
-            for item in data["Topic"]["DocumentReference"]:
-                document_reference = bcf.data.DocumentReference()
-                keys = {
-                    "referenced_document": "ReferencedDocument",
-                    "is_external": "@IsExternal",
-                    "guid": "@Guid",
-                    "description": "Description",
-                }
-                for key, value in keys.items():
-                    if value in item:
-                        setattr(document_reference, key, item[value])
-                topic.document_references.append(document_reference)
-
-        if "RelatedTopic" in data["Topic"]:
-            for item in data["Topic"]["RelatedTopic"]:
-                related_topic = bcf.data.RelatedTopic()
-                related_topic.guid = item["@Guid"]
-                topic.related_topics.append(related_topic)
-        return topic
-
-    def add_topic(self, topic=None):
-        if topic is None:
-            topic = bcf.data.Topic()
-        if not topic.guid:
-            topic.guid = str(uuid.uuid4())
-        if not topic.title:
-            topic.title = "New Topic"
-        os.mkdir(os.path.join(self.filepath, topic.guid))
-        self.edit_topic(topic)
-        return topic
-
-    def edit_topic(self, topic):
-        if not topic.creation_date:
-            topic.creation_date = datetime.utcnow().isoformat()
-            topic.creation_author = self.author
+            bcfxml = BcfXml()
+            bcfxml.filepath = filepath
+            return bcfxml
         else:
-            topic.modified_date = datetime.utcnow().isoformat()
-            topic.modified_author = self.author
+            from bcf.v3.bcfxml import BcfXml
 
-        self.document = minidom.Document()
-        root = self._create_element(self.document, "Markup")
+            bcfxml = BcfXml()
+            bcfxml.filepath = filepath
+            return bcfxml
 
-        self.write_header(topic.header, root)
 
-        topic_el = self._create_element(
-            root,
-            "Topic",
-            {
-                "Guid": topic.guid,
-                "TopicType": topic.topic_type,
-                "TopicStatus": topic.topic_status,
-            },
-        )
+def get_version(version_path):
+    xmlparse = minidom.parse(version_path)
+    version_el = xmlparse.getElementsByTagName("Version")[0]
+    version = version_el.getAttribute("VersionId")
+    return version
 
-        for reference_link in topic.reference_links:
-            self._create_element(topic_el, "ReferenceLink", text=reference_link)
 
-        text_map = {
-            "Title": topic.title,
-            "Priority": topic.priority,
-            "Index": topic.index,
-        }
-        for key, value in text_map.items():
-            if value:
-                self._create_element(topic_el, key, text=value)
-
-        for label in topic.labels:
-            self._create_element(topic_el, "Labels", text=label)
-
-        text_map = {
-            "CreationDate": topic.creation_date,
-            "CreationAuthor": topic.creation_author,
-            "ModifiedDate": topic.modified_date,
-            "ModifiedAuthor": topic.modified_author,
-            "DueDate": topic.due_date,
-            "AssignedTo": topic.assigned_to,
-            "Stage": topic.stage,
-            "Description": topic.description,
-        }
-        for key, value in text_map.items():
-            if value:
-                self._create_element(topic_el, key, text=value)
-
-        if topic.bim_snippet:
-            bim_snippet = self._create_element(
-                topic_el,
-                "BimSnippet",
-                {"SnippetType": topic.bim_snippet.snippet_type, "isExternal": topic.bim_snippet.is_external},
-            )
-            self._create_element(bim_snippet, "Reference", text=topic.bim_snippet.reference)
-            self._create_element(bim_snippet, "ReferenceSchema", text=topic.bim_snippet.reference_schema)
-        for reference in topic.document_references:
-            reference_el = self._create_element(
-                topic_el, "DocumentReference", {"Guid": reference.guid, "isExternal": reference.is_external}
-            )
-            self._create_element(reference_el, "ReferencedDocument", text=reference.referenced_document)
-            self._create_element(reference_el, "Description", text=reference.description)
-        for related_topic in topic.related_topics:
-            self._create_element(topic_el, "RelatedTopic", {"Guid": related_topic.guid})
-
-        self.write_comments(topic.comments, root)
-        self.write_viewpoints(topic.viewpoints, root, topic)
-
-        with open(os.path.join(self.filepath, topic.guid, "markup.bcf"), "wb") as f:
-            f.write(self.document.toprettyxml(encoding="utf-8"))
-
-    def write_header(self, header, root):
-        if not header or not header.files:
-            return
-        header_el = self._create_element(root, "Header")
-        for f in header.files:
-            file_el = self._create_element(
-                header_el,
-                "File",
-                {
-                    "IfcProject": f.ifc_project,
-                    "IfcSpatialStructureElement": f.ifc_spatial_structure_element,
-                    "isExternal": f.is_external,
-                },
-            )
-            self._create_element(file_el, "Filename", text=f.filename)
-            self._create_element(file_el, "Date", text=f.date)
-            self._create_element(file_el, "Reference", text=f.reference)
-
-    def write_comments(self, comments, root):
-        for comment in comments.values():
-            comment_el = self._create_element(root, "Comment", {"Guid": comment.guid})
-            text_map = {
-                "Date": comment.date,
-                "Author": comment.author,
-                "Comment": comment.comment,
-                "ModifiedDate": comment.modified_date,
-                "ModifiedAuthor": comment.modified_author,
-            }
-            for key, value in text_map.items():
-                if value:
-                    self._create_element(comment_el, key, text=value)
-            if comment.viewpoint:
-                self._create_element(comment_el, "Viewpoint", {"Guid": comment.viewpoint.guid})
-
-    def add_comment(self, topic, comment=None):
-        if comment is None:
-            comment = bcf.data.Comment()
-        if not comment.guid:
-            comment.guid = str(uuid.uuid4())
-        if not comment.comment:
-            comment.comment = "'Free software' is a matter of liberty, not price. To understand the concept, you should think of 'free' as in 'free speech,' not as in 'free beer'."
-        topic.comments[comment.guid] = comment
-        self.edit_comment(comment, topic)
-
-    def edit_comment(self, comment, topic):
-        if not comment.date:
-            comment.date = datetime.utcnow().isoformat()
-            comment.author = self.author
-        else:
-            comment.modified_date = datetime.utcnow().isoformat()
-            comment.modified_author = self.author
-        self.edit_topic(topic)
-
-    def delete_comment(self, guid, topic):
-        if guid in topic.comments:
-            del topic.comments[guid]
-        self.edit_topic(topic)
-
-    def delete_topic(self, guid):
-        if guid in self.topics:
-            del self.topics[guid]
-        shutil.rmtree(os.path.join(self.filepath, guid))
-
-    def write_viewpoints(self, viewpoints, root, topic):
-        for viewpoint in viewpoints.values():
-            viewpoint_el = self._create_element(root, "Viewpoints", {"Guid": viewpoint.guid})
-            text_map = {"Viewpoint": viewpoint.viewpoint, "Snapshot": viewpoint.snapshot, "Index": viewpoint.index}
-            for key, value in text_map.items():
-                if value:
-                    self._create_element(viewpoint_el, key, text=value)
-            self.write_viewpoint(viewpoint, topic)
-
-    def write_viewpoint(self, viewpoint, topic):
-        document = minidom.Document()
-        root = self._create_element(document, "VisualizationInfo", {"Guid": viewpoint.guid})
-        self.write_viewpoint_components(viewpoint, root)
-        self.write_viewpoint_orthogonal_camera(viewpoint, root)
-        self.write_viewpoint_perspective_camera(viewpoint, root)
-        self.write_viewpoint_lines(viewpoint, root)
-        self.write_viewpoint_clipping_planes(viewpoint, root)
-        self.write_viewpoint_bitmaps(viewpoint, root)
-        with open(os.path.join(self.filepath, topic.guid, viewpoint.viewpoint), "wb") as f:
-            f.write(document.toprettyxml(encoding="utf-8"))
-
-    def write_viewpoint_components(self, viewpoint, parent):
-        if not viewpoint.components:
-            return
-        components_el = self._create_element(parent, "Components")
-        if viewpoint.components.view_setup_hints:
-            view_setup_hints = self._create_element(
-                components_el,
-                "ViewSetupHints",
-                {
-                    "SpacesVisible": viewpoint.components.view_setup_hints.spaces_visible,
-                    "SpaceBoundariesVisible": viewpoint.components.view_setup_hints.space_boundaries_visible,
-                    "OpeningsVisible": viewpoint.components.view_setup_hints.openings_visible,
-                },
-            )
-        if viewpoint.components.selection:
-            selection_el = self._create_element(components_el, "Selection")
-        for selection in viewpoint.components.selection:
-            self.write_component(selection, selection_el)
-        visibility = self._create_element(
-            components_el, "Visibility", {"DefaultVisibility": viewpoint.components.visibility.default_visibility}
-        )
-        if viewpoint.components.visibility.exceptions:
-            exceptions_el = self._create_element(visibility, "Exceptions")
-        for exception in viewpoint.components.visibility.exceptions:
-            self.write_component(exception, exceptions_el)
-        if viewpoint.components.coloring:
-            coloring_el = self._create_element(components_el, "Coloring")
-        for color in viewpoint.components.coloring:
-            color_el = self._create_element(coloring_el, "Color", {"Color": color.color})
-            for component in color.components:
-                self.write_component(component, color_el)
-
-    def write_viewpoint_orthogonal_camera(self, viewpoint, parent):
-        if not viewpoint.orthogonal_camera:
-            return
-        camera = viewpoint.orthogonal_camera
-        camera_el = self._create_element(parent, "OrthogonalCamera")
-        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
-        self.write_vector(camera_view_point, camera.camera_view_point)
-        camera_direction = self._create_element(camera_el, "CameraDirection")
-        self.write_vector(camera_direction, camera.camera_direction)
-        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
-        self.write_vector(camera_up_vector, camera.camera_up_vector)
-        self._create_element(camera_el, "ViewToWorldScale", text=camera.view_to_world_scale)
-
-    def write_viewpoint_perspective_camera(self, viewpoint, parent):
-        if not viewpoint.perspective_camera:
-            return
-        camera = viewpoint.perspective_camera
-        camera_el = self._create_element(parent, "PerspectiveCamera")
-        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
-        self.write_vector(camera_view_point, camera.camera_view_point)
-        camera_direction = self._create_element(camera_el, "CameraDirection")
-        self.write_vector(camera_direction, camera.camera_direction)
-        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
-        self.write_vector(camera_up_vector, camera.camera_up_vector)
-        self._create_element(camera_el, "FieldOfView", text=camera.field_of_view)
-
-    def write_viewpoint_lines(self, viewpoint, parent):
-        if not viewpoint.lines:
-            return
-        lines_el = self._create_element(parent, "Lines")
-        for line in viewpoint.lines:
-            line_el = self._create_element(lines_el, "Line")
-            start_point_el = self._create_element(line_el, "StartPoint")
-            self.write_vector(start_point_el, line.start_point)
-            end_point_el = self._create_element(line_el, "EndPoint")
-            self.write_vector(end_point_el, line.end_point)
-
-    def write_viewpoint_clipping_planes(self, viewpoint, parent):
-        if not viewpoint.clipping_planes:
-            return
-        planes_el = self._create_element(parent, "ClippingPlanes")
-        for plane in viewpoint.clipping_planes:
-            plane_el = self._create_element(planes_el, "ClippingPlane")
-            location_el = self._create_element(plane_el, "Location")
-            self.write_vector(location_el, plane.location)
-            direction_el = self._create_element(plane_el, "Direction")
-            self.write_vector(direction_el, plane.direction)
-
-    def write_viewpoint_bitmaps(self, viewpoint, parent):
-        if not viewpoint.bitmaps:
-            return
-        for bitmap in viewpoint.bitmaps:
-            bitmap_el = self._create_element(parent, "Bitmap")
-
-            text_map = {"Bitmap": bitmap.bitmap_type, "Reference": bitmap.reference}
-            for key, value in text_map.items():
-                self._create_element(bitmap_el, key, text=value)
-
-            location_el = self._create_element(bitmap_el, "Location")
-            self.write_vector(location_el, bitmap.location)
-            normal_el = self._create_element(bitmap_el, "Normal")
-            self.write_vector(normal_el, bitmap.normal)
-            up_el = self._create_element(bitmap_el, "Up")
-            self.write_vector(up_el, bitmap.up)
-
-            self._create_element(bitmap_el, "Height", text=bitmap.height)
-
-    def write_vector(self, parent, from_obj):
-        self._create_element(parent, "X", text=from_obj.x)
-        self._create_element(parent, "Y", text=from_obj.y)
-        self._create_element(parent, "Z", text=from_obj.z)
-
-    def write_component(self, data, parent):
-        component_el = self._create_element(parent, "Component", {"IfcGuid": data.ifc_guid})
-        text_map = {"OriginatingSystem": data.originating_system, "AuthoringToolId": data.authoring_tool_id}
-        for key, value in text_map.items():
-            if value:
-                self._create_element(component_el, key, text=value)
-
-    def add_viewpoint(self, topic, viewpoint=None):
-        if not viewpoint:
-            viewpoint = bcf.data.Viewpoint()
-        if not viewpoint.guid:
-            viewpoint.guid = str(uuid.uuid4())
-        if not viewpoint.viewpoint:
-            viewpoint.viewpoint = f"{viewpoint.guid}.bcfv"
-        if viewpoint.snapshot:
-            topic_filepath = os.path.join(self.filepath, topic.guid)
-            filepath = os.path.join(topic_filepath, viewpoint.snapshot)
-            if not os.path.exists(filepath):
-                filename = viewpoint.guid + os.path.splitext(viewpoint.snapshot)[-1]
-                copyfile(viewpoint.snapshot, os.path.join(topic_filepath, filename))
-                viewpoint.snapshot = filename
-        topic.viewpoints[viewpoint.guid] = viewpoint
-        self.edit_topic(topic)
-
-    def delete_viewpoint(self, guid, topic):
-        if guid not in topic.viewpoints:
-            return
-        viewpoint = topic.viewpoints[guid]
-        if viewpoint.snapshot:
-            filepath = os.path.join(self.filepath, topic.guid, viewpoint.snapshot)
-            if os.path.exists(filepath):
-                os.remove(filepath)
-        if viewpoint.viewpoint:
-            filepath = os.path.join(self.filepath, topic.guid, viewpoint.viewpoint)
-            if os.path.exists(filepath):
-                os.remove(filepath)
-        for bitmap in viewpoint.bitmaps:
-            if not bitmap.reference:
-                continue
-            filepath = os.path.join(self.filepath, topic.guid, bitmap.reference)
-            if os.path.exists(filepath):
-                os.remove(filepath)
-        del topic.viewpoints[guid]
-        self.edit_topic(topic)
-
-    def delete_file(self, topic, index):
-        if not topic.header:
-            return
-        f = topic.header.files.pop(index)
-        filepath = os.path.join(self.filepath, topic.guid, f.reference)
-        if not f.is_external and os.path.exists(filepath):
-            os.remove(filepath)
-        self.edit_topic(topic)
-
-    def delete_bim_snippet(self, topic):
-        if not topic.bim_snippet:
-            return
-        if topic.bim_snippet.reference and not topic.bim_snippet.is_external:
-            filepath = os.path.join(self.filepath, topic.guid, topic.bim_snippet.reference)
-            if os.path.exists(filepath):
-                os.remove(filepath)
-        topic.bim_snippet = None
-        self.edit_topic(topic)
-
-    def delete_document_reference(self, topic, index):
-        document_reference = topic.document_references[index]
-        if document_reference.referenced_document and not document_reference.is_external:
-            filepath = os.path.join(self.filepath, topic.guid, document_reference.referenced_document)
-            if os.path.exists(filepath):
-                os.remove(filepath)
-        del topic.document_references[index]
-        self.edit_topic(topic)
-
-    def add_document_reference(self, topic, document_reference):
-        if os.path.exists(document_reference.referenced_document):
-            topic_filepath = os.path.join(self.filepath, topic.guid)
-            filename = os.path.basename(document_reference.referenced_document)
-            copyfile(document_reference.referenced_document, os.path.join(topic_filepath, filename))
-            document_reference.referenced_document = filename
-            document_reference.is_external = False
-        else:
-            document_reference.is_external = True
-        if not document_reference.guid:
-            document_reference.guid = str(uuid.uuid4())
-        topic.document_references.append(document_reference)
-        self.edit_topic(topic)
-
-    def add_bim_snippet(self, topic, bim_snippet):
-        if topic.bim_snippet:
-            self.delete_bim_snippet(topic)
-        if os.path.exists(bim_snippet.reference):
-            topic_filepath = os.path.join(self.filepath, topic.guid)
-            filename = os.path.basename(bim_snippet.reference)
-            copyfile(bim_snippet.reference, os.path.join(topic_filepath, filename))
-            bim_snippet.reference = filename
-            bim_snippet.is_external = False
-        else:
-            bim_snippet.is_external = True
-        topic.bim_snippet = bim_snippet
-        self.edit_topic(topic)
-
-    def add_file(self, topic, header_file):
-        if os.path.exists(header_file.reference):
-            topic_filepath = os.path.join(self.filepath, topic.guid)
-            header_file.filename = os.path.basename(header_file.reference)
-            copyfile(header_file.reference, os.path.join(topic_filepath, header_file.filename))
-            header_file.reference = header_file.filename
-            header_file.is_external = False
-        header_file.date = datetime.utcnow().isoformat()
-        if not topic.header:
-            topic.header = bcf.data.Header()
-        topic.header.files.append(header_file)
-        self.edit_topic(topic)
-
-    def get_comments(self, guid):
-        comments = {}
-        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
-        if "Comment" not in data:
-            return comments
-        for item in data["Comment"]:
-            comment = bcf.data.Comment()
-            mandatory_keys = {"guid": "@Guid", "date": "Date", "author": "Author", "comment": "Comment"}
-            for key, value in mandatory_keys.items():
-                setattr(comment, key, item[value])
-            optional_keys = {"modified_date": "ModifiedDate", "modified_author": "ModifiedAuthor"}
-            for key, value in optional_keys.items():
-                if value in item:
-                    setattr(comment, key, item[value])
-            if "Viewpoint" in item:
-                viewpoint = bcf.data.Viewpoint()
-                viewpoint.guid = item["Viewpoint"]["@Guid"]
-                comment.viewpoint = viewpoint
-            comments[comment.guid] = comment
-        self.topics[guid].comments = comments
-        return comments
-
-    def get_viewpoints(self, guid):
-        viewpoints = {}
-        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
-        if "Viewpoints" not in data:
-            return viewpoints
-        for item in data["Viewpoints"]:
-            viewpoint = self.get_viewpoint(item, guid)
-            viewpoints[viewpoint.guid] = viewpoint
-        self.topics[guid].viewpoints = viewpoints
-        return viewpoints
-
-    def get_viewpoint(self, data, topic_guid):
-        viewpoint = bcf.data.Viewpoint()
-        viewpoint.guid = data["@Guid"]
-        optional_keys = {"viewpoint": "Viewpoint", "snapshot": "Snapshot", "index": "Index"}
-        for key, value in optional_keys.items():
-            if value in data:
-                setattr(viewpoint, key, data[value])
-        visinfo = self._read_xml(os.path.join(topic_guid, viewpoint.viewpoint), "visinfo.xsd")
-        viewpoint.components = self.get_viewpoint_components(visinfo)
-        viewpoint.orthogonal_camera = self.get_viewpoint_orthogonal_camera(visinfo)
-        viewpoint.perspective_camera = self.get_viewpoint_perspective_camera(visinfo)
-        viewpoint.lines = self.get_viewpoint_lines(visinfo)
-        viewpoint.clipping_planes = self.get_viewpoint_clipping_planes(visinfo)
-        viewpoint.bitmaps = self.get_viewpoint_bitmaps(visinfo)
-        return viewpoint
-
-    def get_viewpoint_components(self, visinfo):
-        if "Components" not in visinfo:
-            return None
-        components = bcf.data.Components()
-        data = visinfo["Components"]
-        if "ViewSetupHints" in data:
-            view_setup_hints = bcf.data.ViewSetupHints()
-            optional_keys = {
-                "spaces_visible": "@SpacesVisible",
-                "space_boundaries_visible": "@SpaceBoundariesVisible",
-                "openings_visible": "@OpeningsVisible",
-            }
-            for key, value in optional_keys.items():
-                if value in data["ViewSetupHints"]:
-                    setattr(view_setup_hints, key, data["ViewSetupHints"][value])
-            components.view_setup_hints = view_setup_hints
-        if "Selection" in data and "Component" in data["Selection"]:
-            for item in data["Selection"]["Component"]:
-                components.selection.append(self.get_component(item))
-        if "Visibility" in data:
-            component_visibility = bcf.data.ComponentVisibility()
-            if "@DefaultVisibility" in data["Visibility"]:
-                component_visibility.default_visibility = data["Visibility"]["@DefaultVisibility"]
-            if "Exceptions" in data["Visibility"] and "Component" in data["Visibility"]["Exceptions"]:
-                for item in data["Visibility"]["Exceptions"]["Component"]:
-                    component_visibility.exceptions.append(self.get_component(item))
-            components.visibility = component_visibility
-        if "Coloring" in data and "Color" in data["Coloring"]:
-            for item in data["Coloring"]["Color"]:
-                color = bcf.data.Color()
-                color.color = item["@Color"]
-                for item2 in item["Component"]:
-                    color.components.append(self.get_component(item2))
-                components.coloring.append(color)
-        return components
-
-    def get_viewpoint_orthogonal_camera(self, visinfo):
-        if "OrthogonalCamera" not in visinfo:
-            return None
-        camera = bcf.data.OrthogonalCamera()
-        data = visinfo["OrthogonalCamera"]
-        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
-        self.set_vector(camera.camera_direction, data["CameraDirection"])
-        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
-        camera.view_to_world_scale = data["ViewToWorldScale"]
-        return camera
-
-    def get_viewpoint_perspective_camera(self, visinfo):
-        if "PerspectiveCamera" not in visinfo:
-            return None
-        camera = bcf.data.PerspectiveCamera()
-        data = visinfo["PerspectiveCamera"]
-        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
-        self.set_vector(camera.camera_direction, data["CameraDirection"])
-        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
-        camera.field_of_view = data["FieldOfView"]
-        return camera
-
-    def get_viewpoint_lines(self, visinfo):
-        if "Lines" not in visinfo:
-            return []
-        lines = []
-        for item in visinfo["Lines"]["Line"]:
-            line = bcf.data.Line()
-            self.set_vector(line.start_point, item["StartPoint"])
-            self.set_vector(line.end_point, item["EndPoint"])
-            lines.append(line)
-        return lines
-
-    def get_viewpoint_clipping_planes(self, visinfo):
-        if "ClippingPlanes" not in visinfo:
-            return []
-        planes = []
-        for item in visinfo["ClippingPlanes"]["ClippingPlane"]:
-            plane = bcf.data.ClippingPlane()
-            self.set_vector(plane.location, item["Location"])
-            self.set_vector(plane.direction, item["Direction"])
-            planes.append(plane)
-        return planes
-
-    def get_viewpoint_bitmaps(self, visinfo):
-        if "Bitmap" not in visinfo:
-            return []
-        bitmaps = []
-        for item in visinfo["Bitmap"]:
-            bitmap = bcf.data.Bitmap()
-            bitmap.reference = item["Reference"]
-            bitmap.bitmap_type = item["Bitmap"].upper()
-            self.set_vector(bitmap.location, item["Location"])
-            self.set_vector(bitmap.normal, item["Normal"])
-            self.set_vector(bitmap.up, item["Up"])
-            bitmap.height = item["Height"]
-            bitmaps.append(bitmap)
-        return bitmaps
-
-    def set_vector(self, to_obj, from_xml):
-        to_obj.x = from_xml["X"]
-        to_obj.y = from_xml["Y"]
-        to_obj.z = from_xml["Z"]
-
-    def get_component(self, data):
-        component = bcf.data.Component()
-        optional_keys = {
-            "originating_system": "OriginatingSystem",
-            "authoring_tool_id": "AuthoringToolId",
-            "ifc_guid": "@IfcGuid",
-        }
-        for key, value in optional_keys.items():
-            if value in data:
-                setattr(component, key, data[value])
-        return component
-
-    def close_project(self):
-        shutil.rmtree(self.filepath)
-
-    def _read_xml(self, filename, xsd):
-        schema = XMLSchema(os.path.join(cwd, "xsd", xsd))
-        filepath = os.path.join(self.filepath, filename)
-        (data, errors) = schema.to_dict(filepath, validation="lax")
-        for error in errors:
-            self.logger.error(error)
-        return data
-
-    def _create_element(self, parent, name, attributes={}, text=None):
-        element = self.document.createElement(name)
-        for key, value in attributes.items():
-            if isinstance(value, bool):
-                element.setAttribute(key, str(value).lower())
-            elif value:
-                element.setAttribute(key, value)
-        if text is not None:
-            text = self.document.createTextNode(str(text))
-            element.appendChild(text)
-        parent.appendChild(element)
-        return element
-
-    def __del__(self):
-        self.close_project()
+def extract_project(filepath):
+    if not filepath:
+        return
+    zip_file = zipfile.ZipFile(filepath)
+    filepath = tempfile.mkdtemp()
+    zip_file.extractall(filepath)
+    return filepath

src/bcf/bcf/v2/bcfxml.py

@@ -0,0 +1,771 @@
+import os
+import uuid
+import shutil
+import zipfile
+import logging
+import tempfile
+import bcf.v2.data
+from datetime import datetime
+from xml.dom import minidom
+from xmlschema import XMLSchema
+from contextlib import contextmanager
+from shutil import copyfile
+
+
+cwd = os.path.dirname(os.path.realpath(__file__))
+
+
+@contextmanager
+def cd(newdir):
+    prevdir = os.getcwd()
+    os.chdir(os.path.expanduser(newdir))
+    try:
+        yield
+    finally:
+        os.chdir(prevdir)
+
+
+class BcfXml:
+    def __init__(self):
+        self.filepath = None
+        self.logger = logging.getLogger("bcfxml")
+        self.author = "john@doe.com"
+        self.project = bcf.v2.data.Project()
+        self.version = "2.1"
+        self.topics = {}
+
+    def new_project(self):
+        self.project.project_id = str(uuid.uuid4())
+        self.project.name = "New Project"
+        self.topics = {}
+        if self.filepath:
+            self.close_project()
+        self.filepath = tempfile.mkdtemp()
+        self.edit_project()
+        self.edit_version()
+
+    def get_project(self, filepath=None):
+        if not filepath:
+            return self.project
+        if os.path.isfile(os.path.join(self.filepath, "project.bcfp")):
+            data = self._read_xml("project.bcfp", "project.xsd")
+            self.project.extension_schema = data["ExtensionSchema"]
+            if "Project" in data:
+                self.project.project_id = data["Project"]["@ProjectId"]
+                self.project.name = data["Project"].get("Name")
+        return self.project
+
+    def edit_project(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "ProjectExtension")
+        project = self._create_element(root, "Project", {"ProjectId": self.project.project_id})
+        self._create_element(project, "Name", text=self.project.name)
+        self._create_element(root, "ExtensionSchema", text="extensions.xsd")
+        with open(os.path.join(self.filepath, "project.bcfp"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def save_project(self, filepath):
+        with cd(self.filepath):
+            zip_file = zipfile.ZipFile(filepath, "w", zipfile.ZIP_DEFLATED)
+            for root, dirs, files in os.walk("./"):
+                for file in files:
+                    zip_file.write(os.path.join(root, file))
+            zip_file.close()
+
+    def get_version(self):
+        data = self._read_xml("bcf.version", "version.xsd")
+        self.version = data["@VersionId"]
+        return self.version
+
+    def edit_version(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Version", {"VersionId": self.version})
+        version = self._create_element(root, "DetailedVersion", text=self.version)
+        with open(os.path.join(self.filepath, "bcf.version"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def get_topics(self):
+        self.topics = {}
+        topics = []
+        subdirs = []
+        for (dirpath, dirnames, filenames) in os.walk(self.filepath):
+            subdirs = dirnames
+            break
+        for subdir in subdirs:
+            try:
+                uuid.UUID(subdir)
+            except ValueError:
+                continue
+            if not os.path.exists(os.path.join(self.filepath, subdir, "markup.bcf")):
+                continue
+            self.topics[subdir] = self.get_topic(subdir)
+        return self.topics
+
+    def get_header(self, guid):
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Header" not in data:
+            return
+        header = bcf.v2.data.Header()
+        for item in data["Header"]["File"]:
+            header_file = bcf.v2.data.HeaderFile()
+            optional_keys = {
+                "filename": "Filename",
+                "date": "Date",
+                "reference": "Reference",
+                "ifc_project": "@IfcProject",
+                "ifc_spatial_structure_element": "@IfcSpatialStructureElement",
+                "is_external": "@isExternal",
+            }
+            for key, value in optional_keys.items():
+                if value in item:
+                    setattr(header_file, key, item[value])
+            header.files.append(header_file)
+        self.topics[guid].header = header
+        return header
+
+    def get_topic(self, guid):
+        if guid in self.topics:
+            return self.topics[guid]
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        topic = bcf.v2.data.Topic()
+        self.topics[guid] = topic
+
+        mandatory_keys = {
+            "guid": "@Guid",
+            "title": "Title",
+            "creation_date": "CreationDate",
+            "creation_author": "CreationAuthor",
+        }
+        for key, value in mandatory_keys.items():
+            setattr(topic, key, data["Topic"][value])
+
+        optional_keys = {
+            "priority": "Priority",
+            "index": "Index",
+            "labels": "Labels",
+            "reference_links": "ReferenceLink",
+            "modified_date": "ModifiedDate",
+            "modified_author": "ModifiedAuthor",
+            "due_date": "DueDate",
+            "assigned_to": "AssignedTo",
+            "stage": "Stage",
+            "description": "Description",
+            "topic_status": "@TopicStatus",
+            "topic_type": "@TopicType",
+        }
+        for key, value in optional_keys.items():
+            if value in data["Topic"]:
+                setattr(topic, key, data["Topic"][value])
+
+        if "BimSnippet" in data["Topic"]:
+            bim_snippet = bcf.v2.data.BimSnippet()
+            keys = {
+                "snippet_type": "@SnippetType",
+                "is_external": "@IsExternal",
+                "reference": "Reference",
+                "reference_schema": "ReferenceSchema",
+            }
+            for key, value in keys.items():
+                if value in data["Topic"]["BimSnippet"]:
+                    setattr(bim_snippet, key, data["Topic"]["BimSnippet"][value])
+            topic.bim_snippet = bim_snippet
+
+        if "DocumentReference" in data["Topic"]:
+            for item in data["Topic"]["DocumentReference"]:
+                document_reference = bcf.v2.data.DocumentReference()
+                keys = {
+                    "referenced_document": "ReferencedDocument",
+                    "is_external": "@IsExternal",
+                    "guid": "@Guid",
+                    "description": "Description",
+                }
+                for key, value in keys.items():
+                    if value in item:
+                        setattr(document_reference, key, item[value])
+                topic.document_references.append(document_reference)
+
+        if "RelatedTopic" in data["Topic"]:
+            for item in data["Topic"]["RelatedTopic"]:
+                related_topic = bcf.v2.data.RelatedTopic()
+                related_topic.guid = item["@Guid"]
+                topic.related_topics.append(related_topic)
+        return topic
+
+    def add_topic(self, topic=None):
+        if topic is None:
+            topic = bcf.v2.data.Topic()
+        if not topic.guid:
+            topic.guid = str(uuid.uuid4())
+        if not topic.title:
+            topic.title = "New Topic"
+        os.mkdir(os.path.join(self.filepath, topic.guid))
+        self.edit_topic(topic)
+        return topic
+
+    def edit_topic(self, topic):
+        if not topic.creation_date:
+            topic.creation_date = datetime.utcnow().isoformat()
+            topic.creation_author = self.author
+        else:
+            topic.modified_date = datetime.utcnow().isoformat()
+            topic.modified_author = self.author
+
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Markup")
+
+        self.write_header(topic.header, root)
+
+        topic_el = self._create_element(
+            root,
+            "Topic",
+            {
+                "Guid": topic.guid,
+                "TopicType": topic.topic_type,
+                "TopicStatus": topic.topic_status,
+            },
+        )
+
+        for reference_link in topic.reference_links:
+            self._create_element(topic_el, "ReferenceLink", text=reference_link)
+
+        text_map = {
+            "Title": topic.title,
+            "Priority": topic.priority,
+            "Index": topic.index,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+
+        for label in topic.labels:
+            self._create_element(topic_el, "Labels", text=label)
+
+        text_map = {
+            "CreationDate": topic.creation_date,
+            "CreationAuthor": topic.creation_author,
+            "ModifiedDate": topic.modified_date,
+            "ModifiedAuthor": topic.modified_author,
+            "DueDate": topic.due_date,
+            "AssignedTo": topic.assigned_to,
+            "Stage": topic.stage,
+            "Description": topic.description,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+
+        if topic.bim_snippet:
+            bim_snippet = self._create_element(
+                topic_el,
+                "BimSnippet",
+                {"SnippetType": topic.bim_snippet.snippet_type, "isExternal": topic.bim_snippet.is_external},
+            )
+            self._create_element(bim_snippet, "Reference", text=topic.bim_snippet.reference)
+            self._create_element(bim_snippet, "ReferenceSchema", text=topic.bim_snippet.reference_schema)
+        for reference in topic.document_references:
+            reference_el = self._create_element(
+                topic_el, "DocumentReference", {"Guid": reference.guid, "isExternal": reference.is_external}
+            )
+            self._create_element(reference_el, "ReferencedDocument", text=reference.referenced_document)
+            self._create_element(reference_el, "Description", text=reference.description)
+        for related_topic in topic.related_topics:
+            self._create_element(topic_el, "RelatedTopic", {"Guid": related_topic.guid})
+
+        self.write_comments(topic.comments, root)
+        self.write_viewpoints(topic.viewpoints, root, topic)
+
+        with open(os.path.join(self.filepath, topic.guid, "markup.bcf"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def write_header(self, header, root):
+        if not header or not header.files:
+            return
+        header_el = self._create_element(root, "Header")
+        for f in header.files:
+            file_el = self._create_element(
+                header_el,
+                "File",
+                {
+                    "IfcProject": f.ifc_project,
+                    "IfcSpatialStructureElement": f.ifc_spatial_structure_element,
+                    "isExternal": f.is_external,
+                },
+            )
+            if f.filename:
+                self._create_element(file_el, "Filename", text=f.filename)
+            if f.date:
+                self._create_element(file_el, "Date", text=f.date)
+            if f.reference:
+                self._create_element(file_el, "Reference", text=f.reference)
+
+    def write_comments(self, comments, root):
+        for comment in comments.values():
+            comment_el = self._create_element(root, "Comment", {"Guid": comment.guid})
+            text_map = {
+                "Date": comment.date,
+                "Author": comment.author,
+                "Comment": comment.comment,
+                "ModifiedDate": comment.modified_date,
+                "ModifiedAuthor": comment.modified_author,
+            }
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(comment_el, key, text=value)
+            if comment.viewpoint:
+                self._create_element(comment_el, "Viewpoint", {"Guid": comment.viewpoint.guid})
+
+    def add_comment(self, topic, comment=None):
+        if comment is None:
+            comment = bcf.v2.data.Comment()
+        if not comment.guid:
+            comment.guid = str(uuid.uuid4())
+        if not comment.comment:
+            comment.comment = "'Free software' is a matter of liberty, not price. To understand the concept, you should think of 'free' as in 'free speech,' not as in 'free beer'."
+        topic.comments[comment.guid] = comment
+        self.edit_comment(comment, topic)
+
+    def edit_comment(self, comment, topic):
+        if not comment.date:
+            comment.date = datetime.utcnow().isoformat()
+            comment.author = self.author
+        else:
+            comment.modified_date = datetime.utcnow().isoformat()
+            comment.modified_author = self.author
+        self.edit_topic(topic)
+
+    def delete_comment(self, guid, topic):
+        if guid in topic.comments:
+            del topic.comments[guid]
+        self.edit_topic(topic)
+
+    def delete_topic(self, guid):
+        if guid in self.topics:
+            del self.topics[guid]
+        shutil.rmtree(os.path.join(self.filepath, guid))
+
+    def write_viewpoints(self, viewpoints, root, topic):
+        for viewpoint in viewpoints.values():
+            viewpoint_el = self._create_element(root, "Viewpoints", {"Guid": viewpoint.guid})
+            text_map = {"Viewpoint": viewpoint.viewpoint, "Snapshot": viewpoint.snapshot, "Index": viewpoint.index}
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(viewpoint_el, key, text=value)
+            self.write_viewpoint(viewpoint, topic)
+
+    def write_viewpoint(self, viewpoint, topic):
+        document = minidom.Document()
+        root = self._create_element(document, "VisualizationInfo", {"Guid": viewpoint.guid})
+        self.write_viewpoint_components(viewpoint, root)
+        self.write_viewpoint_orthogonal_camera(viewpoint, root)
+        self.write_viewpoint_perspective_camera(viewpoint, root)
+        self.write_viewpoint_lines(viewpoint, root)
+        self.write_viewpoint_clipping_planes(viewpoint, root)
+        self.write_viewpoint_bitmaps(viewpoint, root)
+        with open(os.path.join(self.filepath, topic.guid, viewpoint.viewpoint), "wb") as f:
+            f.write(document.toprettyxml(encoding="utf-8"))
+
+    def write_viewpoint_components(self, viewpoint, parent):
+        if not viewpoint.components:
+            return
+        components_el = self._create_element(parent, "Components")
+        if viewpoint.components.view_setup_hints:
+            view_setup_hints = self._create_element(
+                components_el,
+                "ViewSetupHints",
+                {
+                    "SpacesVisible": viewpoint.components.view_setup_hints.spaces_visible,
+                    "SpaceBoundariesVisible": viewpoint.components.view_setup_hints.space_boundaries_visible,
+                    "OpeningsVisible": viewpoint.components.view_setup_hints.openings_visible,
+                },
+            )
+        if viewpoint.components.selection:
+            selection_el = self._create_element(components_el, "Selection")
+        for selection in viewpoint.components.selection:
+            self.write_component(selection, selection_el)
+        visibility = self._create_element(
+            components_el, "Visibility", {"DefaultVisibility": viewpoint.components.visibility.default_visibility}
+        )
+        if viewpoint.components.visibility.exceptions:
+            exceptions_el = self._create_element(visibility, "Exceptions")
+        for exception in viewpoint.components.visibility.exceptions:
+            self.write_component(exception, exceptions_el)
+        if viewpoint.components.coloring:
+            coloring_el = self._create_element(components_el, "Coloring")
+        for color in viewpoint.components.coloring:
+            color_el = self._create_element(coloring_el, "Color", {"Color": color.color})
+            for component in color.components:
+                self.write_component(component, color_el)
+
+    def write_viewpoint_orthogonal_camera(self, viewpoint, parent):
+        if not viewpoint.orthogonal_camera:
+            return
+        camera = viewpoint.orthogonal_camera
+        camera_el = self._create_element(parent, "OrthogonalCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "ViewToWorldScale", text=camera.view_to_world_scale)
+
+    def write_viewpoint_perspective_camera(self, viewpoint, parent):
+        if not viewpoint.perspective_camera:
+            return
+        camera = viewpoint.perspective_camera
+        camera_el = self._create_element(parent, "PerspectiveCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "FieldOfView", text=camera.field_of_view)
+
+    def write_viewpoint_lines(self, viewpoint, parent):
+        if not viewpoint.lines:
+            return
+        lines_el = self._create_element(parent, "Lines")
+        for line in viewpoint.lines:
+            line_el = self._create_element(lines_el, "Line")
+            start_point_el = self._create_element(line_el, "StartPoint")
+            self.write_vector(start_point_el, line.start_point)
+            end_point_el = self._create_element(line_el, "EndPoint")
+            self.write_vector(end_point_el, line.end_point)
+
+    def write_viewpoint_clipping_planes(self, viewpoint, parent):
+        if not viewpoint.clipping_planes:
+            return
+        planes_el = self._create_element(parent, "ClippingPlanes")
+        for plane in viewpoint.clipping_planes:
+            plane_el = self._create_element(planes_el, "ClippingPlane")
+            location_el = self._create_element(plane_el, "Location")
+            self.write_vector(location_el, plane.location)
+            direction_el = self._create_element(plane_el, "Direction")
+            self.write_vector(direction_el, plane.direction)
+
+    def write_viewpoint_bitmaps(self, viewpoint, parent):
+        if not viewpoint.bitmaps:
+            return
+        for bitmap in viewpoint.bitmaps:
+            bitmap_el = self._create_element(parent, "Bitmap")
+
+            text_map = {"Bitmap": bitmap.bitmap_format, "Reference": bitmap.reference}
+            for key, value in text_map.items():
+                self._create_element(bitmap_el, key, text=value)
+
+            location_el = self._create_element(bitmap_el, "Location")
+            self.write_vector(location_el, bitmap.location)
+            normal_el = self._create_element(bitmap_el, "Normal")
+            self.write_vector(normal_el, bitmap.normal)
+            up_el = self._create_element(bitmap_el, "Up")
+            self.write_vector(up_el, bitmap.up)
+
+            self._create_element(bitmap_el, "Height", text=bitmap.height)
+
+    def write_vector(self, parent, from_obj):
+        self._create_element(parent, "X", text=from_obj.x)
+        self._create_element(parent, "Y", text=from_obj.y)
+        self._create_element(parent, "Z", text=from_obj.z)
+
+    def write_component(self, data, parent):
+        component_el = self._create_element(parent, "Component", {"IfcGuid": data.ifc_guid})
+        text_map = {"OriginatingSystem": data.originating_system, "AuthoringToolId": data.authoring_tool_id}
+        for key, value in text_map.items():
+            if value:
+                self._create_element(component_el, key, text=value)
+
+    def add_viewpoint(self, topic, viewpoint=None):
+        if not viewpoint:
+            viewpoint = bcf.v2.data.Viewpoint()
+        if not viewpoint.guid:
+            viewpoint.guid = str(uuid.uuid4())
+        if not viewpoint.viewpoint:
+            viewpoint.viewpoint = f"{viewpoint.guid}.bcfv"
+        if viewpoint.snapshot:
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filepath = os.path.join(topic_filepath, viewpoint.snapshot)
+            if not os.path.exists(filepath):
+                filename = viewpoint.guid + os.path.splitext(viewpoint.snapshot)[-1]
+                copyfile(viewpoint.snapshot, os.path.join(topic_filepath, filename))
+                viewpoint.snapshot = filename
+        topic.viewpoints[viewpoint.guid] = viewpoint
+        self.edit_topic(topic)
+
+    def delete_viewpoint(self, guid, topic):
+        if guid not in topic.viewpoints:
+            return
+        viewpoint = topic.viewpoints[guid]
+        if viewpoint.snapshot:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.snapshot)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        if viewpoint.viewpoint:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.viewpoint)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        for bitmap in viewpoint.bitmaps:
+            if not bitmap.reference:
+                continue
+            filepath = os.path.join(self.filepath, topic.guid, bitmap.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.viewpoints[guid]
+        self.edit_topic(topic)
+
+    def delete_file(self, topic, index):
+        if not topic.header:
+            return
+        f = topic.header.files.pop(index)
+        filepath = os.path.join(self.filepath, topic.guid, f.reference)
+        if not f.is_external and os.path.exists(filepath):
+            os.remove(filepath)
+        self.edit_topic(topic)
+
+    def delete_bim_snippet(self, topic):
+        if not topic.bim_snippet:
+            return
+        if topic.bim_snippet.reference and not topic.bim_snippet.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, topic.bim_snippet.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        topic.bim_snippet = None
+        self.edit_topic(topic)
+
+    def delete_document_reference(self, topic, index):
+        document_reference = topic.document_references[index]
+        if document_reference.referenced_document and not document_reference.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, document_reference.referenced_document)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.document_references[index]
+        self.edit_topic(topic)
+
+    def add_document_reference(self, topic, document_reference):
+        if os.path.exists(document_reference.referenced_document):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(document_reference.referenced_document)
+            copyfile(document_reference.referenced_document, os.path.join(topic_filepath, filename))
+            document_reference.referenced_document = filename
+            document_reference.is_external = False
+        else:
+            document_reference.is_external = True
+        if not document_reference.guid:
+            document_reference.guid = str(uuid.uuid4())
+        topic.document_references.append(document_reference)
+        self.edit_topic(topic)
+
+    def add_bim_snippet(self, topic, bim_snippet):
+        if topic.bim_snippet:
+            self.delete_bim_snippet(topic)
+        if os.path.exists(bim_snippet.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(bim_snippet.reference)
+            copyfile(bim_snippet.reference, os.path.join(topic_filepath, filename))
+            bim_snippet.reference = filename
+            bim_snippet.is_external = False
+        else:
+            bim_snippet.is_external = True
+        topic.bim_snippet = bim_snippet
+        self.edit_topic(topic)
+
+    def add_file(self, topic, header_file):
+        if os.path.exists(header_file.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            header_file.filename = os.path.basename(header_file.reference)
+            copyfile(header_file.reference, os.path.join(topic_filepath, header_file.filename))
+            header_file.reference = header_file.filename
+            header_file.is_external = False
+        header_file.date = datetime.utcnow().isoformat()
+        if not topic.header:
+            topic.header = bcf.v2.data.Header()
+        topic.header.files.append(header_file)
+        self.edit_topic(topic)
+
+    def get_comments(self, guid):
+        comments = {}
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Comment" not in data:
+            return comments
+        for item in data["Comment"]:
+            comment = bcf.v2.data.Comment()
+            mandatory_keys = {"guid": "@Guid", "date": "Date", "author": "Author", "comment": "Comment"}
+            for key, value in mandatory_keys.items():
+                setattr(comment, key, item[value])
+            optional_keys = {"modified_date": "ModifiedDate", "modified_author": "ModifiedAuthor"}
+            for key, value in optional_keys.items():
+                if value in item:
+                    setattr(comment, key, item[value])
+            if "Viewpoint" in item:
+                viewpoint = bcf.v2.data.Viewpoint()
+                viewpoint.guid = item["Viewpoint"]["@Guid"]
+                comment.viewpoint = viewpoint
+            comments[comment.guid] = comment
+        self.topics[guid].comments = comments
+        return comments
+
+    def get_viewpoints(self, guid):
+        viewpoints = {}
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Viewpoints" not in data:
+            return viewpoints
+        for item in data["Viewpoints"]:
+            viewpoint = self.get_viewpoint(item, guid)
+            viewpoints[viewpoint.guid] = viewpoint
+        self.topics[guid].viewpoints = viewpoints
+        return viewpoints
+
+    def get_viewpoint(self, data, topic_guid):
+        viewpoint = bcf.v2.data.Viewpoint()
+        viewpoint.guid = data["@Guid"]
+        optional_keys = {"viewpoint": "Viewpoint", "snapshot": "Snapshot", "index": "Index"}
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(viewpoint, key, data[value])
+        visinfo = self._read_xml(os.path.join(topic_guid, viewpoint.viewpoint), "visinfo.xsd")
+        viewpoint.components = self.get_viewpoint_components(visinfo)
+        viewpoint.orthogonal_camera = self.get_viewpoint_orthogonal_camera(visinfo)
+        viewpoint.perspective_camera = self.get_viewpoint_perspective_camera(visinfo)
+        viewpoint.lines = self.get_viewpoint_lines(visinfo)
+        viewpoint.clipping_planes = self.get_viewpoint_clipping_planes(visinfo)
+        viewpoint.bitmaps = self.get_viewpoint_bitmaps(visinfo)
+        return viewpoint
+
+    def get_viewpoint_components(self, visinfo):
+        if "Components" not in visinfo:
+            return None
+        components = bcf.v2.data.Components()
+        data = visinfo["Components"]
+        if "ViewSetupHints" in data:
+            view_setup_hints = bcf.v2.data.ViewSetupHints()
+            optional_keys = {
+                "spaces_visible": "@SpacesVisible",
+                "space_boundaries_visible": "@SpaceBoundariesVisible",
+                "openings_visible": "@OpeningsVisible",
+            }
+            for key, value in optional_keys.items():
+                if value in data["ViewSetupHints"]:
+                    setattr(view_setup_hints, key, data["ViewSetupHints"][value])
+            components.view_setup_hints = view_setup_hints
+        if "Selection" in data and "Component" in data["Selection"]:
+            for item in data["Selection"]["Component"]:
+                components.selection.append(self.get_component(item))
+        if "Visibility" in data:
+            component_visibility = bcf.v2.data.ComponentVisibility()
+            if "@DefaultVisibility" in data["Visibility"]:
+                component_visibility.default_visibility = data["Visibility"]["@DefaultVisibility"]
+            if "Exceptions" in data["Visibility"] and "Component" in data["Visibility"]["Exceptions"]:
+                for item in data["Visibility"]["Exceptions"]["Component"]:
+                    component_visibility.exceptions.append(self.get_component(item))
+            components.visibility = component_visibility
+        if "Coloring" in data and "Color" in data["Coloring"]:
+            for item in data["Coloring"]["Color"]:
+                color = bcf.v2.data.Color()
+                color.color = item["@Color"]
+                for item2 in item["Component"]:
+                    color.components.append(self.get_component(item2))
+                components.coloring.append(color)
+        return components
+
+    def get_viewpoint_orthogonal_camera(self, visinfo):
+        if "OrthogonalCamera" not in visinfo:
+            return None
+        camera = bcf.v2.data.OrthogonalCamera()
+        data = visinfo["OrthogonalCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.view_to_world_scale = data["ViewToWorldScale"]
+        return camera
+
+    def get_viewpoint_perspective_camera(self, visinfo):
+        if "PerspectiveCamera" not in visinfo:
+            return None
+        camera = bcf.v2.data.PerspectiveCamera()
+        data = visinfo["PerspectiveCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.field_of_view = data["FieldOfView"]
+        return camera
+
+    def get_viewpoint_lines(self, visinfo):
+        if "Lines" not in visinfo:
+            return []
+        lines = []
+        for item in visinfo["Lines"]["Line"]:
+            line = bcf.v2.data.Line()
+            self.set_vector(line.start_point, item["StartPoint"])
+            self.set_vector(line.end_point, item["EndPoint"])
+            lines.append(line)
+        return lines
+
+    def get_viewpoint_clipping_planes(self, visinfo):
+        if "ClippingPlanes" not in visinfo:
+            return []
+        planes = []
+        for item in visinfo["ClippingPlanes"]["ClippingPlane"]:
+            plane = bcf.v2.data.ClippingPlane()
+            self.set_vector(plane.location, item["Location"])
+            self.set_vector(plane.direction, item["Direction"])
+            planes.append(plane)
+        return planes
+
+    def get_viewpoint_bitmaps(self, visinfo):
+        if "Bitmap" not in visinfo:
+            return []
+        bitmaps = []
+        for item in visinfo["Bitmap"]:
+            bitmap = bcf.v2.data.Bitmap()
+            bitmap.reference = item["Reference"]
+            bitmap.bitmap_format = item["Bitmap"].upper()
+            self.set_vector(bitmap.location, item["Location"])
+            self.set_vector(bitmap.normal, item["Normal"])
+            self.set_vector(bitmap.up, item["Up"])
+            bitmap.height = item["Height"]
+            bitmaps.append(bitmap)
+        return bitmaps
+
+    def set_vector(self, to_obj, from_xml):
+        to_obj.x = from_xml["X"]
+        to_obj.y = from_xml["Y"]
+        to_obj.z = from_xml["Z"]
+
+    def get_component(self, data):
+        component = bcf.v2.data.Component()
+        optional_keys = {
+            "originating_system": "OriginatingSystem",
+            "authoring_tool_id": "AuthoringToolId",
+            "ifc_guid": "@IfcGuid",
+        }
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(component, key, data[value])
+        return component
+
+    def close_project(self):
+        shutil.rmtree(self.filepath)
+
+    def _read_xml(self, filename, xsd):
+        schema = XMLSchema(os.path.join(cwd, "xsd", xsd))
+        filepath = os.path.join(self.filepath, filename)
+        (data, errors) = schema.to_dict(filepath, validation="lax")
+        for error in errors:
+            self.logger.error(error)
+        return data
+
+    def _create_element(self, parent, name, attributes={}, text=None):
+        element = self.document.createElement(name)
+        for key, value in attributes.items():
+            if isinstance(value, bool):
+                element.setAttribute(key, str(value).lower())
+            elif value:
+                element.setAttribute(key, value)
+        if text is not None:
+            text = self.document.createTextNode(str(text))
+            element.appendChild(text)
+        parent.appendChild(element)
+        return element
+
+    def __del__(self):
+        self.close_project()

src/bcf/bcf/v2/data.py

@@ -157,7 +157,7 @@ class Bitmap:
     def __init__(self):
         self.reference = ""  # Only in BCF-XML
         self.bitmap_data = None  # Only in BCF-API
-        self.bitmap_type = "PNG"  # Enum of png or jpg
+        self.bitmap_format = "PNG"  # Enum of png or jpg
         self.location = Point()
         self.normal = Direction()
         self.up = Direction()

src/bcf/bcf/v3/bcfxml.py

@@ -0,0 +1,827 @@
+import os
+import uuid
+import shutil
+import zipfile
+import logging
+import tempfile
+import bcf.v3.data
+from datetime import datetime
+from xml.dom import minidom
+from xmlschema import XMLSchema
+from contextlib import contextmanager
+from shutil import copyfile
+
+cwd = os.path.dirname(os.path.realpath(__file__))
+
+
+@contextmanager
+def cd(newdir):
+    prevdir = os.getcwd()
+    os.chdir(os.path.expanduser(newdir))
+    try:
+        yield
+    finally:
+        os.chdir(prevdir)
+
+
+class BcfXml:
+    def __init__(self):
+        self.filepath = None
+        self.logger = logging.getLogger("bcfxml")
+        self.author = "john@doe.com"
+        self.project = bcf.v3.data.Project()
+        self.version = "3.0"
+        self.topics = {}
+
+    def new_project(self):
+        self.project.project_id = str(uuid.uuid4())
+        self.project.name = "New Project"
+        self.topics = {}
+        if self.filepath:
+            self.close_project()
+        self.filepath = tempfile.mkdtemp()
+        self.edit_project()
+        self.edit_version()
+
+    def get_project(self, filepath=None):
+        if os.path.isfile(os.path.join(self.filepath, "project.bcfp")):
+            data = self._read_xml("project.bcfp", "project.xsd")
+            self.project.project_id = data["Project"]["@ProjectId"]
+            self.project.name = data["Project"].get("Name")
+        return self.project
+
+    def edit_project(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "ProjectInfo")
+        project = self._create_element(root, "Project", {"ProjectId": self.project.project_id})
+        if self.project.name:
+            self._create_element(project, "Name", text=self.project.name)
+        with open(os.path.join(self.filepath, "project.bcfp"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def save_project(self, filepath):
+        with cd(self.filepath):
+            zip_file = zipfile.ZipFile(filepath, "w", zipfile.ZIP_DEFLATED)
+            for root, dirs, files in os.walk("./"):
+                for file in files:
+                    zip_file.write(os.path.join(root, file))
+            zip_file.close()
+
+    def get_version(self):
+        data = self._read_xml("bcf.version", "version.xsd")
+        self.version = data["@VersionId"]
+        return self.version
+
+    def edit_version(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Version", {"VersionId": self.version})
+        with open(os.path.join(self.filepath, "bcf.version"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def get_topics(self):
+        self.topics = {}
+        topics = []
+        subdirs = []
+        for (dirpath, dirnames, filenames) in os.walk(self.filepath):
+            subdirs = dirnames
+            break
+        for subdir in subdirs:
+            try:
+                uuid.UUID(subdir)
+            except ValueError:
+                continue
+            if not os.path.exists(os.path.join(self.filepath, subdir, "markup.bcf")):
+                continue
+            self.topics[subdir] = self.get_topic(subdir)
+        return self.topics
+
+    def get_header(self, guid):
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Header" not in data:
+            return
+        header = bcf.v3.data.Header()
+        if data["Header"].get("Files"):
+            for item in data["Header"]["Files"].get("File", []):
+                header_file = bcf.v3.data.HeaderFile()
+                optional_keys = {
+                    "filename": "Filename",
+                    "date": "Date",
+                    "reference": "Reference",
+                    "ifc_project": "@IfcProject",
+                    "ifc_spatial_structure_element": "@IfcSpatialStructureElement",
+                    "is_external": "@IsExternal",
+                }
+                for key, value in optional_keys.items():
+                    if value in item:
+                        setattr(header_file, key, item[value])
+                header.files.append(header_file)
+            self.topics[guid].header = header
+            return header
+
+    def get_topic(self, guid):
+        if guid in self.topics:
+            return self.topics[guid]
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        topic = bcf.v3.data.Topic()
+        self.topics[guid] = topic
+
+        mandatory_keys = {
+            "guid": "@Guid",
+            "title": "Title",
+            "creation_date": "CreationDate",
+            "creation_author": "CreationAuthor",
+            "topic_status": "@TopicStatus",
+            "topic_type": "@TopicType",
+        }
+        for key, value in mandatory_keys.items():
+            setattr(topic, key, data["Topic"][value])
+
+        optional_keys = {
+            "priority": "Priority",
+            "index": "Index",
+            "modified_date": "ModifiedDate",
+            "modified_author": "ModifiedAuthor",
+            "due_date": "DueDate",
+            "assigned_to": "AssignedTo",
+            "stage": "Stage",
+            "description": "Description",
+            "server_assigned_id": "@ServerAssignedId",
+        }
+        for key, value in optional_keys.items():
+            if value in data["Topic"]:
+                setattr(topic, key, data["Topic"][value])
+
+        if "ReferenceLinks" in data["Topic"]:
+            topic.reference_links.extend(data["Topic"]["ReferenceLinks"].get("ReferenceLink", []))
+
+        if "Labels" in data["Topic"]:
+            topic.labels.extend(data["Topic"]["Labels"].get("Label", []))
+
+        if "BimSnippet" in data["Topic"]:
+            bim_snippet = bcf.v3.data.BimSnippet()
+            keys = {
+                "snippet_type": "@SnippetType",
+                "is_external": "@IsExternal",
+                "reference": "Reference",
+                "reference_schema": "ReferenceSchema",
+            }
+            for key, value in keys.items():
+                if value in data["Topic"]["BimSnippet"]:
+                    setattr(bim_snippet, key, data["Topic"]["BimSnippet"][value])
+            topic.bim_snippet = bim_snippet
+
+        if data["Topic"].get("DocumentReferences"):
+            for item in data["Topic"]["DocumentReferences"].get("DocumentReference", []):
+                document_reference = bcf.v3.data.DocumentReference()
+                keys = {
+                    "document_guid": "DocumentGuid",
+                    "url": "Url",
+                    "guid": "@Guid",
+                    "description": "Description",
+                }
+                for key, value in keys.items():
+                    if value in item:
+                        setattr(document_reference, key, item[value])
+                topic.document_references.append(document_reference)
+
+        if data["Topic"].get("RelatedTopics"):
+            for item in data["Topic"]["RelatedTopics"].get("RelatedTopic", []):
+                related_topic = bcf.v3.data.RelatedTopic()
+                related_topic.guid = item["@Guid"]
+                topic.related_topics.append(related_topic)
+            return topic
+
+    def add_topic(self, topic=None):
+        if topic is None:
+            topic = bcf.v3.data.Topic()
+        if not topic.guid:
+            topic.guid = str(uuid.uuid4())
+        if not topic.title:
+            topic.title = "New Topic"
+        os.mkdir(os.path.join(self.filepath, topic.guid))
+        self.edit_topic(topic)
+        return topic
+
+    def edit_topic(self, topic):
+        if not topic.creation_date:
+            topic.creation_date = datetime.utcnow().isoformat()
+            topic.creation_author = self.author
+        else:
+            topic.modified_date = datetime.utcnow().isoformat()
+            topic.modified_author = self.author
+
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Markup")
+        if topic.header:
+            self.write_header(topic.header, root)
+
+        topic_el = self._create_element(
+            root,
+            "Topic",
+            {
+                "Guid": topic.guid,
+                "ServerAssignedId": topic.server_assigned_id,
+                "TopicType": topic.topic_type,
+                "TopicStatus": topic.topic_status,
+            },
+        )
+        if topic.reference_links:
+            reference_Links_el = self._create_element(topic_el, "ReferenceLinks")
+            for reference_link in topic.reference_links:
+                self._create_element(reference_Links_el, "ReferenceLink", text=reference_link)
+
+        text_map = {
+            "Title": topic.title,
+            "Priority": topic.priority,
+            "Index": topic.index,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+        if topic.labels:
+            label_el = self._create_element(topic_el, "Labels")
+            for label in topic.labels:
+                self._create_element(label_el, "Label", text=label)
+
+        text_map = {
+            "CreationDate": topic.creation_date,
+            "CreationAuthor": topic.creation_author,
+            "ModifiedDate": topic.modified_date,
+            "ModifiedAuthor": topic.modified_author,
+            "DueDate": topic.due_date,
+            "AssignedTo": topic.assigned_to,
+            "Stage": topic.stage,
+            "Description": topic.description,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+
+        if topic.bim_snippet:
+            bim_snippet = self._create_element(
+                topic_el,
+                "BimSnippet",
+                {
+                    "SnippetType": topic.bim_snippet.snippet_type,
+                    "IsExternal": topic.bim_snippet.is_external,
+                },
+            )
+            self._create_element(bim_snippet, "Reference", text=topic.bim_snippet.reference)
+            self._create_element(
+                bim_snippet,
+                "ReferenceSchema",
+                text=topic.bim_snippet.reference_schema,
+            )
+        if topic.document_references:
+            reference_el = self._create_element(topic_el, "DocumentReferences")
+            self.write_document_references(topic.document_references, reference_el)
+        if topic.related_topics:
+            related_topic_el = self._create_element(topic_el, "RelatedTopics")
+            for related_topic in topic.related_topics:
+                self._create_element(related_topic_el, "RelatedTopic", {"Guid": related_topic.guid})
+        if topic.comments:
+            comment_el = self._create_element(topic_el, "Comments")
+            self.write_comments(topic.comments, comment_el)
+        if topic.viewpoints:
+            viewpoint_el = self._create_element(topic_el, "Viewpoints")
+            self.write_viewpoints(topic.viewpoints, viewpoint_el, topic)
+        with open(os.path.join(self.filepath, topic.guid, "markup.bcf"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def write_document_references(self, references, root):
+        for reference in references:
+            document_reference_el = self._create_element(root, "DocumentReference", {"Guid": reference.guid})
+            if reference.document_guid:
+                self._create_element(document_reference_el, "DocumentGuid", text=reference.document_guid)
+            elif reference.url:
+                self._create_element(document_reference_el, "Url", text=reference.url)
+            if reference.description:
+                self._create_element(document_reference_el, "Description", text=reference.description)
+
+    def write_header(self, header, root):
+        if not header or not header.files:
+            return
+        header_el = self._create_element(root, "Header")
+        files_el = self._create_element(header_el, "Files")
+        for f in header.files:
+            file_el = self._create_element(
+                files_el,
+                "File",
+                {
+                    "IfcProject": f.ifc_project,
+                    "IfcSpatialStructureElement": f.ifc_spatial_structure_element,
+                    "IsExternal": f.is_external,
+                },
+            )
+            if f.filename:
+                self._create_element(file_el, "Filename", text=f.filename)
+            if f.date:
+                self._create_element(file_el, "Date", text=f.date)
+            if f.reference:
+                self._create_element(file_el, "Reference", text=f.reference)
+
+    def write_comments(self, comments, root):
+        for comment in comments.values():
+            comment_el = self._create_element(root, "Comment", {"Guid": comment.guid})
+            text_map = {
+                "Date": comment.date,
+                "Author": comment.author,
+                "Comment": comment.comment,
+                "ModifiedDate": comment.modified_date,
+                "ModifiedAuthor": comment.modified_author,
+            }
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(comment_el, key, text=value)
+            if comment.viewpoint:
+                self._create_element(comment_el, "Viewpoint", {"Guid": comment.viewpoint.guid})
+
+    def add_comment(self, topic, comment=None):
+        if comment is None:
+            comment = bcf.v3.data.Comment()
+        if not comment.guid:
+            comment.guid = str(uuid.uuid4())
+        if not comment.comment:
+            comment.comment = "'Free software' is a matter of liberty, not price. To understand the concept, you should think of 'free' as in 'free speech,' not as in 'free beer'."
+        topic.comments[comment.guid] = comment
+        self.edit_comment(comment, topic)
+
+    def edit_comment(self, comment, topic):
+        if not comment.date:
+            comment.date = datetime.utcnow().isoformat()
+            comment.author = self.author
+        else:
+            comment.modified_date = datetime.utcnow().isoformat()
+            comment.modified_author = self.author
+        self.edit_topic(topic)
+
+    def delete_comment(self, guid, topic):
+        if guid in topic.comments:
+            del topic.comments[guid]
+        self.edit_topic(topic)
+
+    def delete_topic(self, guid):
+        if guid in self.topics:
+            del self.topics[guid]
+        shutil.rmtree(os.path.join(self.filepath, guid))
+
+    def write_viewpoints(self, viewpoints, root, topic):
+        for viewpoint in viewpoints.values():
+            viewpoint_el = self._create_element(root, "ViewPoint", {"Guid": viewpoint.guid})
+            text_map = {
+                "Viewpoint": viewpoint.viewpoint,
+                "Snapshot": viewpoint.snapshot,
+                "Index": viewpoint.index,
+            }
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(viewpoint_el, key, text=value)
+            self.write_viewpoint(viewpoint, topic)
+
+    def write_viewpoint(self, viewpoint, topic):
+        document = minidom.Document()
+        root = self._create_element(document, "VisualizationInfo", {"Guid": viewpoint.guid})
+        self.write_viewpoint_components(viewpoint, root)
+        self.write_viewpoint_orthogonal_camera(viewpoint, root)
+        self.write_viewpoint_perspective_camera(viewpoint, root)
+        self.write_viewpoint_lines(viewpoint, root)
+        self.write_viewpoint_clipping_planes(viewpoint, root)
+        self.write_viewpoint_bitmaps(viewpoint, root)
+        with open(os.path.join(self.filepath, topic.guid, viewpoint.viewpoint), "wb") as f:
+            f.write(document.toprettyxml(encoding="utf-8"))
+
+    def write_viewpoint_components(self, viewpoint, parent):
+        if not viewpoint.components:
+            return
+        components_el = self._create_element(parent, "Components")
+        if viewpoint.components.selection:
+            selection_el = self._create_element(components_el, "Selection")
+            for selection in viewpoint.components.selection:
+                self.write_component(selection, selection_el)
+        if viewpoint.components.visibility:
+            visibility = self._create_element(
+                components_el,
+                "Visibility",
+                {"DefaultVisibility": viewpoint.components.visibility.default_visibility},
+            )
+            if viewpoint.components.visibility.view_setup_hints:
+                view_setup_hints = self._create_element(
+                    visibility,
+                    "ViewSetupHints",
+                    {
+                        "SpacesVisible": viewpoint.components.visibility.view_setup_hints.spaces_visible,
+                        "SpaceBoundariesVisible": viewpoint.components.visibility.view_setup_hints.space_boundaries_visible,
+                        "OpeningsVisible": viewpoint.components.visibility.view_setup_hints.openings_visible,
+                    },
+                )
+            if viewpoint.components.visibility.exceptions:
+                exceptions_el = self._create_element(visibility, "Exceptions")
+                for exception in viewpoint.components.visibility.exceptions:
+                    self.write_component(exception, exceptions_el)
+        if viewpoint.components.coloring:
+            coloring_el = self._create_element(components_el, "Coloring")
+            for color in viewpoint.components.coloring:
+                color_el = self._create_element(coloring_el, "Color", {"Color": color.color})
+                component_el = self._create_element(color_el, "Components")
+                for component in color.components:
+                    self.write_component(component, component_el)
+
+    def write_viewpoint_orthogonal_camera(self, viewpoint, parent):
+        if not viewpoint.orthogonal_camera:
+            return
+        camera = viewpoint.orthogonal_camera
+        camera_el = self._create_element(parent, "OrthogonalCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "ViewToWorldScale", text=camera.view_to_world_scale)
+        self._create_element(camera_el, "AspectRatio", text=camera.aspect_ratio)
+
+    def write_viewpoint_perspective_camera(self, viewpoint, parent):
+        if not viewpoint.perspective_camera:
+            return
+        camera = viewpoint.perspective_camera
+        camera_el = self._create_element(parent, "PerspectiveCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "FieldOfView", text=camera.field_of_view)
+        self._create_element(camera_el, "AspectRatio", text=camera.aspect_ratio)
+
+    def write_viewpoint_lines(self, viewpoint, parent):
+        if not viewpoint.lines:
+            return
+        lines_el = self._create_element(parent, "Lines")
+        for line in viewpoint.lines:
+            line_el = self._create_element(lines_el, "Line")
+            start_point_el = self._create_element(line_el, "StartPoint")
+            self.write_vector(start_point_el, line.start_point)
+            end_point_el = self._create_element(line_el, "EndPoint")
+            self.write_vector(end_point_el, line.end_point)
+
+    def write_viewpoint_clipping_planes(self, viewpoint, parent):
+        if not viewpoint.clipping_planes:
+            return
+        planes_el = self._create_element(parent, "ClippingPlanes")
+        for plane in viewpoint.clipping_planes:
+            plane_el = self._create_element(planes_el, "ClippingPlane")
+            location_el = self._create_element(plane_el, "Location")
+            self.write_vector(location_el, plane.location)
+            direction_el = self._create_element(plane_el, "Direction")
+            self.write_vector(direction_el, plane.direction)
+
+    def write_viewpoint_bitmaps(self, viewpoint, parent):
+        if not viewpoint.bitmaps:
+            return
+        bitmaps_el = self._create_element(parent, "Bitmaps")
+        for bitmap in viewpoint.bitmaps:
+            bitmap_el = self._create_element(bitmaps_el, "Bitmap")
+
+            text_map = {"Format": bitmap.bitmap_format, "Reference": bitmap.reference}
+            for key, value in text_map.items():
+                self._create_element(bitmap_el, key, text=value)
+
+            location_el = self._create_element(bitmap_el, "Location")
+            self.write_vector(location_el, bitmap.location)
+            normal_el = self._create_element(bitmap_el, "Normal")
+            self.write_vector(normal_el, bitmap.normal)
+            up_el = self._create_element(bitmap_el, "Up")
+            self.write_vector(up_el, bitmap.up)
+
+            self._create_element(bitmap_el, "Height", text=bitmap.height)
+
+    def write_vector(self, parent, from_obj):
+        self._create_element(parent, "X", text=from_obj.x)
+        self._create_element(parent, "Y", text=from_obj.y)
+        self._create_element(parent, "Z", text=from_obj.z)
+
+    def write_component(self, data, parent):
+        component_el = self._create_element(parent, "Component", {"IfcGuid": data.ifc_guid})
+        text_map = {
+            "OriginatingSystem": data.originating_system,
+            "AuthoringToolId": data.authoring_tool_id,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(component_el, key, text=value)
+
+    def add_viewpoint(self, topic, viewpoint=None):
+        if not viewpoint:
+            viewpoint = bcf.v3.data.Viewpoint()
+        if not viewpoint.guid:
+            viewpoint.guid = str(uuid.uuid4())
+        if not viewpoint.viewpoint:
+            viewpoint.viewpoint = f"{viewpoint.guid}.bcfv"
+        if viewpoint.snapshot:
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filepath = os.path.join(topic_filepath, viewpoint.snapshot)
+            if not os.path.exists(filepath):
+                filename = viewpoint.guid + os.path.splitext(viewpoint.snapshot)[-1]
+                copyfile(viewpoint.snapshot, os.path.join(topic_filepath, filename))
+                viewpoint.snapshot = filename
+        topic.viewpoints[viewpoint.guid] = viewpoint
+        self.edit_topic(topic)
+
+    def delete_viewpoint(self, guid, topic):
+        if guid not in topic.viewpoints:
+            return
+        viewpoint = topic.viewpoints[guid]
+        if viewpoint.snapshot:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.snapshot)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        if viewpoint.viewpoint:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.viewpoint)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        for bitmap in viewpoint.bitmaps:
+            if not bitmap.reference:
+                continue
+            filepath = os.path.join(self.filepath, topic.guid, bitmap.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.viewpoints[guid]
+        self.edit_topic(topic)
+
+    def delete_file(self, topic, index):
+        if not topic.header:
+            return
+        f = topic.header.files.pop(index)
+        filepath = os.path.join(self.filepath, topic.guid, f.reference)
+        if not f.is_external and os.path.exists(filepath):
+            os.remove(filepath)
+        self.edit_topic(topic)
+
+    def delete_bim_snippet(self, topic):
+        if not topic.bim_snippet:
+            return
+        if topic.bim_snippet.reference and not topic.bim_snippet.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, topic.bim_snippet.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        topic.bim_snippet = None
+        self.edit_topic(topic)
+
+    def delete_document_reference(self, topic, index):
+        document_reference = topic.document_references[index]
+        if document_reference.referenced_document and not document_reference.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, document_reference.referenced_document)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.document_references[index]
+        self.edit_topic(topic)
+
+    def add_document_reference(self, topic, document_reference):
+        if os.path.exists(document_reference.referenced_document):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(document_reference.referenced_document)
+            copyfile(
+                document_reference.referenced_document,
+                os.path.join(topic_filepath, filename),
+            )
+            document_reference.referenced_document = filename
+            document_reference.is_external = False
+        else:
+            document_reference.is_external = True
+        if not document_reference.guid:
+            document_reference.guid = str(uuid.uuid4())
+        topic.document_references.append(document_reference)
+        self.edit_topic(topic)
+
+    def add_bim_snippet(self, topic, bim_snippet):
+        if topic.bim_snippet:
+            self.delete_bim_snippet(topic)
+        if os.path.exists(bim_snippet.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(bim_snippet.reference)
+            copyfile(bim_snippet.reference, os.path.join(topic_filepath, filename))
+            bim_snippet.reference = filename
+            bim_snippet.is_external = False
+        else:
+            bim_snippet.is_external = True
+        topic.bim_snippet = bim_snippet
+        self.edit_topic(topic)
+
+    def add_file(self, topic, header_file):
+        if os.path.exists(header_file.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            header_file.filename = os.path.basename(header_file.reference)
+            copyfile(
+                header_file.reference,
+                os.path.join(topic_filepath, header_file.filename),
+            )
+            header_file.reference = header_file.filename
+            header_file.is_external = False
+        header_file.date = datetime.utcnow().isoformat()
+        if not topic.header:
+            topic.header = bcf.v3.data.Header()
+        topic.header.files.append(header_file)
+        self.edit_topic(topic)
+
+    def get_comments(self, guid):
+        comments = {}
+        if "Comments" not in data["Topics"]:
+            return comments
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        for item in data["Topic"]["Comments"].get("Comment", []):
+            comment = bcf.v3.data.Comment()
+            mandatory_keys = {
+                "guid": "@Guid",
+                "date": "Date",
+                "author": "Author",
+            }
+            for key, value in mandatory_keys.items():
+                setattr(comment, key, item[value])
+            optional_keys = {
+                "comment": "Comment",
+                "modified_date": "ModifiedDate",
+                "modified_author": "ModifiedAuthor",
+            }
+            for key, value in optional_keys.items():
+                if value in item:
+                    setattr(comment, key, item[value])
+            if "Viewpoint" in item:
+                viewpoint = bcf.v3.data.Viewpoint()
+                viewpoint.guid = item["Viewpoint"]["@Guid"]
+                comment.viewpoint = viewpoint
+            comments[comment.guid] = comment
+        self.topics[guid].comments = comments
+        return comments
+
+    def get_viewpoints(self, guid):
+        viewpoints = {}
+        if "Viewpoints" not in data["Topic"]:
+            return viewpoints
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        for item in data["Topic"]["Viewpoints"]:
+            viewpoint = self.get_viewpoint(item, guid)
+            viewpoints[viewpoint.guid] = viewpoint
+        self.topics[guid].viewpoints = viewpoints
+        return viewpoints
+
+    def get_viewpoint(self, data, topic_guid):
+        viewpoint = bcf.v3.data.Viewpoint()
+        viewpoint.guid = data["@Guid"]
+        optional_keys = {
+            "viewpoint": "Viewpoint",
+            "snapshot": "Snapshot",
+            "index": "Index",
+        }
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(viewpoint, key, data[value])
+        visinfo = self._read_xml(os.path.join(topic_guid, viewpoint.viewpoint), "visinfo.xsd")
+        viewpoint.components = self.get_viewpoint_components(visinfo)
+        viewpoint.orthogonal_camera = self.get_viewpoint_orthogonal_camera(visinfo)
+        viewpoint.perspective_camera = self.get_viewpoint_perspective_camera(visinfo)
+        viewpoint.lines = self.get_viewpoint_lines(visinfo)
+        viewpoint.clipping_planes = self.get_viewpoint_clipping_planes(visinfo)
+        viewpoint.bitmaps = self.get_viewpoint_bitmaps(visinfo)
+        return viewpoint
+
+    def get_viewpoint_components(self, visinfo):
+        if "Components" not in visinfo:
+            return None
+        components = bcf.v3.data.Components()
+        data = visinfo["Components"]
+        if "Selection" in data and "Component" in data["Selection"]:
+            for item in data["Selection"].get("Component", []):
+                components.selection.append(self.get_component(item))
+        if "Visibility" in data:
+            component_visibility = bcf.v3.data.ComponentVisibility()
+            if "@DefaultVisibility" in data["Visibility"]:
+                component_visibility.default_visibility = data["Visibility"]["@DefaultVisibility"]
+            if "Exceptions" in data["Visibility"] and "Component" in data["Visibility"]["Exceptions"]:
+                for item in data["Visibility"]["Exceptions"]["Component"]:
+                    component_visibility.exceptions.append(self.get_component(item))
+            if "ViewSetupHints" in data["Visibility"]:
+                view_setup_hints = bcf.v3.data.ViewSetupHints()
+                optional_keys = {
+                    "spaces_visible": "@SpacesVisible",
+                    "space_boundaries_visible": "@SpaceBoundariesVisible",
+                    "openings_visible": "@OpeningsVisible",
+                }
+                for key, value in optional_keys.items():
+                    if value in data["Visibility"]["ViewSetupHints"]:
+                        setattr(view_setup_hints, key, data["Visibility"]["ViewSetupHints"][value])
+                component_visibility.view_setup_hints = view_setup_hints
+            components.visibility = component_visibility
+        if "Coloring" in data and "Color" in data["Coloring"]:
+            for item in data["Coloring"]["Color"]:
+                color = bcf.v3.data.Color()
+                color.color = item["@Color"]
+                for item2 in item["Components"]["Component"]:
+                    color.components.append(self.get_component(item2))
+                components.coloring.append(color)
+        return components
+
+    def get_viewpoint_orthogonal_camera(self, visinfo):
+        if "OrthogonalCamera" not in visinfo:
+            return None
+        camera = bcf.v3.data.OrthogonalCamera()
+        data = visinfo["OrthogonalCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.view_to_world_scale = data["ViewToWorldScale"]
+        camera.aspect_ratio = data["AspectRatio"]
+        return camera
+
+    def get_viewpoint_perspective_camera(self, visinfo):
+        if "PerspectiveCamera" not in visinfo:
+            return None
+        camera = bcf.v3.data.PerspectiveCamera()
+        data = visinfo["PerspectiveCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.field_of_view = data["FieldOfView"]
+        camera.aspect_ratio = data["AspectRatio"]
+        return camera
+
+    def get_viewpoint_lines(self, visinfo):
+        if "Lines" not in visinfo:
+            return []
+        lines = []
+        for item in visinfo["Lines"].get("Line", []):
+            line = bcf.v3.data.Line()
+            self.set_vector(line.start_point, item["StartPoint"])
+            self.set_vector(line.end_point, item["EndPoint"])
+            lines.append(line)
+        return lines
+
+    def get_viewpoint_clipping_planes(self, visinfo):
+        if "ClippingPlanes" not in visinfo:
+            return []
+        planes = []
+        for item in visinfo["ClippingPlanes"]["ClippingPlane"]:
+            plane = bcf.v3.data.ClippingPlane()
+            self.set_vector(plane.location, item["Location"])
+            self.set_vector(plane.direction, item["Direction"])
+            planes.append(plane)
+        return planes
+
+    def get_viewpoint_bitmaps(self, visinfo):
+        if "Bitmaps" not in visinfo:
+            return []
+        bitmaps = []
+        for item in visinfo["Bitmaps"].get("Bitmap"):
+            bitmap = bcf.v3.data.Bitmap()
+            bitmap.reference = item["Reference"]
+            bitmap.bitmap_format = item["Format"].upper()
+            self.set_vector(bitmap.location, item["Location"])
+            self.set_vector(bitmap.normal, item["Normal"])
+            self.set_vector(bitmap.up, item["Up"])
+            bitmap.height = item["Height"]
+            bitmaps.append(bitmap)
+        return bitmaps
+
+    def set_vector(self, to_obj, from_xml):
+        to_obj.x = from_xml["X"]
+        to_obj.y = from_xml["Y"]
+        to_obj.z = from_xml["Z"]
+
+    def get_component(self, data):
+        component = bcf.v3.data.Component()
+        optional_keys = {
+            "originating_system": "OriginatingSystem",
+            "authoring_tool_id": "AuthoringToolId",
+            "ifc_guid": "@IfcGuid",
+        }
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(component, key, data[value])
+        return component
+
+    def close_project(self):
+        shutil.rmtree(self.filepath)
+
+    def _read_xml(self, filename, xsd):
+        schema = XMLSchema(os.path.join(cwd, "xsd", xsd))
+        filepath = os.path.join(self.filepath, filename)
+        (data, errors) = schema.to_dict(filepath, validation="lax")
+        for error in errors:
+            self.logger.error(error)
+        return data
+
+    def _create_element(self, parent, name, attributes={}, text=None):
+        element = self.document.createElement(name)
+        for key, value in attributes.items():
+            if isinstance(value, bool):
+                element.setAttribute(key, str(value).lower())
+            elif value:
+                element.setAttribute(key, value)
+        if text is not None:
+            text = self.document.createTextNode(str(text))
+            element.appendChild(text)
+        parent.appendChild(element)
+        return element
+
+    def __del__(self):
+        self.close_project()

src/bcf/bcf/v3/data.py

@@ -0,0 +1,181 @@
+class Project:
+    def __init__(self):
+        self.project_id = ""
+        self.name = ""
+
+
+class BimSnippet:
+    def __init__(self):
+        self.snippet_type = None
+        self.is_external = False
+        self.reference = None
+        self.reference_schema = None
+
+
+class DocumentReference:
+    def __init__(self):
+        self.description = None
+        self.document_guid = None
+        self.url = None
+        self.guid = None
+
+
+class RelatedTopic:
+    def __init__(self):
+        self.guid = None
+
+
+class HeaderFile:
+    def __init__(self):
+        self.file_name = ""
+        self.date = None
+        self.reference = ""
+        self.ifc_project = None
+        self.ifc_spatial_structure_element = None
+        self.is_external = True
+
+
+class Header:
+    def __init__(self):
+        self.files = []
+
+
+class Topic:
+    def __init__(self):
+        self.reference_links = []
+        self.title = ""
+        self.priority = None
+        self.index = None  # Deprecated, stored, but ignored
+        self.labels = []
+        self.creation_date = None
+        self.creation_author = None
+        self.modified_date = None
+        self.modified_author = None
+        self.due_date = None
+        self.assigned_to = None
+        self.stage = None
+        self.description = None
+        self.bim_snippet = None
+        self.document_references = []
+        self.related_topics = []
+        self.topic_status = None
+        self.topic_type = None
+        self.guid = None
+
+        self.header = None
+        self.comments = {}
+        self.viewpoints = {}
+        self.server_assigned_id = ""
+
+
+class Comment:
+    def __init__(self):
+        self.guid = None
+        self.date = None
+        self.author = ""
+        self.comment = ""
+        self.viewpoint = None
+        self.modified_date = None
+        self.modified_author = ""
+
+
+class ViewSetupHints:
+    def __init__(self):
+        self.spaces_visible = False
+        self.space_boundaries_visible = False
+        self.openings_visible = False
+
+
+class Component:
+    def __init__(self):
+        self.originating_system = None
+        self.authoring_tool_id = None
+        self.ifc_guid = None
+
+
+class ComponentVisibility:
+    def __init__(self):
+        self.exceptions = []
+        self.default_visibility = False
+        self.view_setup_hints = None
+
+
+class Color:
+    def __init__(self):
+        self.color = None
+        self.components = []
+
+
+class Components:
+    def __init__(self):
+
+        self.selection = []
+        self.visibility = None
+        self.coloring = []
+
+
+class Point:
+    def __init__(self):
+        self.x = 0
+        self.y = 0
+        self.z = 0
+
+
+class Direction(Point):
+    pass
+
+
+class OrthogonalCamera:
+    def __init__(self):
+        self.camera_view_point = Point()
+        self.camera_direction = Direction()
+        self.camera_up_vector = Direction()
+        self.view_to_world_scale = 1.0
+        self.aspect_ratio = 1.0
+
+
+class PerspectiveCamera:
+    def __init__(self):
+        self.camera_view_point = Point()
+        self.camera_direction = Direction()
+        self.camera_up_vector = Direction()
+        self.field_of_view = 60.0
+        self.aspect_ratio = 1.0
+
+
+class Line:
+    def __init__(self):
+        self.start_point = Point()
+        self.end_point = Point()
+
+
+class ClippingPlane:
+    def __init__(self):
+        self.location = Point()
+        self.direction = Direction()
+
+
+class Bitmap:
+    def __init__(self):
+        self.reference = ""  # Only in BCF-XML
+        self.bitmap_data = None  # Only in BCF-API
+        self.bitmap_format = "PNG"  # Enum of png or jpg
+        self.location = Point()
+        self.normal = Direction()
+        self.up = Direction()
+        self.height = 1.0
+
+
+class Viewpoint:
+    def __init__(self):
+        self.guid = None
+        self.viewpoint = None
+        self.snapshot = None
+        self.index = None
+
+        self.components = None  # It's not a list, despite the plural name
+        self.orthogonal_camera = None
+        self.perspective_camera = None
+        self.lines = []
+        self.clipping_planes = []
+        self.bitmaps = []

src/bcf/bcf/v3/xsd/documents.xsd

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+
+    <xs:element name="DocumentInfo">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Documents" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Document" type="Document" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Document">
+        <xs:sequence>
+            <!-- Filename of the document with the file extension. Not used to store the file in the BCF -->
+            <xs:element name="Filename" type="NonEmptyOrBlankString"/>
+            <!-- Human readable description of the document -->
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="DocumentAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="DocumentAttributes">
+        <!-- Guid of the document. Must match the filename in the BCF -->
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:attributeGroup>
+</xs:schema>

src/bcf/bcf/v3/xsd/extensions.xsd

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+
+    <xs:element name="Extensions">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="TopicTypes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicType" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="TopicStatuses" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicStatus" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Priorities" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Priority" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="TopicLabels" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicLabel" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Users" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="User" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="SnippetTypes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="SnippetType" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Stages" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Stage" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+</xs:schema>

src/bcf/bcf/v3/xsd/markup.xsd

@@ -0,0 +1,174 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="Markup">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Header" type="Header" minOccurs="0"/>
+                <xs:element name="Topic" type="Topic"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Header">
+        <xs:sequence>
+            <xs:element name="Files" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="File" type="File" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <!-- ISG Jira issue BCF-9. Add support for several viewpoints and snapshots per issue -->
+    <xs:complexType name="ViewPoint">
+        <xs:sequence>
+            <!-- viewpoint file (xml) -->
+            <xs:element name="Viewpoint" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- the snapshot png -->
+            <xs:element name="Snapshot" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- the viewpoint index (sort order) -->
+            <xs:element name="Index" type="xs:int" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+        <!-- Guid of the viewpoint -->
+    </xs:complexType>
+    <!-- BimSnippet -->
+    <xs:complexType name="BimSnippet">
+        <xs:sequence>
+            <!--
+        Name of the file in the topic folder containing the snippet or a URL.
+         E.G.- Expresscode containing p.e Issue, Request
+        // Maybe some header infos ?? // IfcEntites // Geometry 
+         -->
+            <!-- Reference (name) to the snippet file -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString"/>
+            <xs:element name="ReferenceSchema" type="NonEmptyOrBlankString"/>
+        </xs:sequence>
+        <xs:attribute name="SnippetType" type="NonEmptyOrBlankString" use="required"/>
+        <xs:attribute name="IsExternal" type="xs:boolean" default="false"/>
+        <!-- This flag is true when the reference is a URL pointing outside of the BCF file-->
+    </xs:complexType>
+    <xs:complexType name="Topic">
+        <xs:sequence>
+            <xs:element name="ReferenceLinks" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="ReferenceLink" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="Title" type="NonEmptyOrBlankString"/>
+            <xs:element name="Priority" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- ISG Jira issue BCF-8 Add a way save order the topics -->
+            <!-- This property is deprecated and will be removed in a future release -->
+            <xs:element name="Index" type="xs:int" minOccurs="0"/>
+            <xs:element name="Labels" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Label" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="CreationDate" type="xs:dateTime"/>
+            <xs:element name="CreationAuthor" type="NonEmptyOrBlankString"/>
+            <xs:element name="ModifiedDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="ModifiedAuthor" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="DueDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="AssignedTo" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Stage" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="BimSnippet" type="BimSnippet" minOccurs="0"/>
+            <xs:element name="DocumentReferences" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="DocumentReference" type="DocumentReference" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="RelatedTopics" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="RelatedTopic" minOccurs="0" maxOccurs="unbounded">
+                            <xs:complexType>
+                                <xs:attribute name="Guid" type="Guid" use="required"/>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="Comments" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Comment" type="Comment" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <!-- ISG Jira issue BCF-9. Add support for several viewpoints and snapshots per issue -->
+            <xs:element name="Viewpoints" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="ViewPoint" type="ViewPoint" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+        <xs:attribute name="ServerAssignedId" type="NonEmptyOrBlankString" use="optional"/>
+        <xs:attribute name="TopicType" type="NonEmptyOrBlankString" use="required"/>
+        <xs:attribute name="TopicStatus" type="NonEmptyOrBlankString" use="required"/>
+    </xs:complexType>
+    <xs:complexType name="File">
+        <xs:sequence>
+            <xs:element name="Filename" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Date" type="xs:dateTime" minOccurs="0"/>
+            <!-- Reference (URL) of the file -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="FileAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="FileAttributes">
+        <xs:attribute name="IfcProject" type="IfcGuid" use="optional"/>
+        <xs:attribute name="IfcSpatialStructureElement" type="IfcGuid" use="optional"/>
+        <xs:attribute name="IsExternal" type="xs:boolean" default="true"/>
+    </xs:attributeGroup>
+    <!-- Reference to a document inside of the topic folder or a url pointing to the web -->
+    <xs:complexType name="DocumentReference">
+        <xs:sequence>
+            <xs:choice>
+                <!-- Guid of the document: If pointing to an internal document -->
+                <xs:element name="DocumentGuid" type="Guid" minOccurs="0"/>
+                <!-- Url of the reference. If pointing to an external document -->
+                <xs:element name="Url" type="NonEmptyOrBlankString" minOccurs="0"/>
+            </xs:choice>
+            <!-- Human readable description of the document reference -->
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="DocumentReferenceAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="DocumentReferenceAttributes">
+        <!-- Guid of the document reference -->
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:attributeGroup>
+    <xs:complexType name="Comment">
+        <xs:sequence>
+            <xs:element name="Date" type="xs:dateTime"/>
+            <xs:element name="Author" type="NonEmptyOrBlankString"/>
+            <xs:element name="Comment" minOccurs="0" type="NonEmptyOrBlankString"/>
+            <xs:element name="Viewpoint" minOccurs="0">
+                <xs:complexType>
+                    <xs:attribute name="Guid" type="Guid" use="required"/>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="ModifiedDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="ModifiedAuthor" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:complexType>
+    <xs:simpleType name="IfcGuid">
+        <xs:restriction base="xs:string">
+            <xs:length value="22"/>
+            <xs:pattern value="[0-9A-Za-z_$]*"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>

src/bcf/bcf/v3/xsd/project.xsd

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="ProjectInfo">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Project" type="Project"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Project">
+        <xs:sequence>
+            <xs:element name="Name" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="ProjectId" type="NonEmptyOrBlankString" use="required"/>
+    </xs:complexType>
+</xs:schema>

src/bcf/bcf/v3/xsd/shared-types.xsd

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:simpleType name="Guid">
+        <xs:restriction base="xs:string">
+            <xs:pattern value="[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:simpleType name="NonEmptyOrBlankString">
+        <xs:restriction base="xs:string">
+            <xs:minLength value="1"/>
+            <xs:whiteSpace value="collapse"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>

src/bcf/bcf/v3/xsd/version.xsd

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:element name="Version">
+        <xs:complexType>
+            <xs:attribute name="VersionId" type="xs:string" use="required"/>
+        </xs:complexType>
+    </xs:element>
+</xs:schema>

src/bcf/bcf/v3/xsd/visinfo.xsd

@@ -0,0 +1,220 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="VisualizationInfo">
+        <xs:annotation>
+            <xs:documentation>VisualizationInfo documentation</xs:documentation>
+        </xs:annotation>
+        <xs:complexType>
+            <xs:sequence>
+                <!--
+                Although plural, 'Components' is not a collection
+                -->
+                <xs:element name="Components" type="Components" minOccurs="0"/>
+                <xs:choice>
+                    <xs:element name="OrthogonalCamera" type="OrthogonalCamera"/>
+                    <xs:element name="PerspectiveCamera" type="PerspectiveCamera"/>
+                </xs:choice>
+                <xs:element name="Lines" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Line" type="Line" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="ClippingPlanes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="ClippingPlane" type="ClippingPlane" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Bitmaps" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Bitmap" type="Bitmap" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+            <!-- Guid of the viewpoint -->
+            <xs:attribute name="Guid" type="Guid" use="required"/>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="OrthogonalCamera">
+        <xs:sequence>
+            <xs:element name="CameraViewPoint" type="Point"/>
+            <xs:element name="CameraDirection" type="Direction"/>
+            <xs:element name="CameraUpVector" type="Direction"/>
+            <xs:element name="ViewToWorldScale" type="xs:double">
+                <xs:annotation>
+                    <xs:documentation>view's visible vertical size in meters</xs:documentation>
+                </xs:annotation>
+            </xs:element>
+            <xs:element name="AspectRatio" type="PositiveDouble">
+                <xs:annotation>
+                    <xs:documentation>
+                        Proportional relationship between the width and the height of the view (w/h).
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="PerspectiveCamera">
+        <xs:sequence>
+            <xs:element name="CameraViewPoint" type="Point"/>
+            <xs:element name="CameraDirection" type="Direction"/>
+            <xs:element name="CameraUpVector" type="Direction"/>
+            <xs:element name="FieldOfView" type="FieldOfView">
+                <xs:annotation>
+                    <xs:documentation>
+                        Vertical field of view, in degrees.
+                        It is currently limited to a value between 45 and 60 degrees.
+                        This limitation will be dropped in the next release and viewers
+                        should be expect values outside this range in current implementations.
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+            <xs:element name="AspectRatio" type="PositiveDouble">
+                <xs:annotation>
+                    <xs:documentation>
+                        Proportional relationship between the width and the height of the view (w/h).
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Point">
+        <xs:sequence>
+            <xs:element name="X" type="xs:double"/>
+            <xs:element name="Y" type="xs:double"/>
+            <xs:element name="Z" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Direction">
+        <xs:sequence>
+            <xs:element name="X" type="xs:double"/>
+            <xs:element name="Y" type="xs:double"/>
+            <xs:element name="Z" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:simpleType name="PositiveDouble">
+        <xs:restriction base="xs:double">
+            <xs:minExclusive value="0"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:simpleType name="FieldOfView">
+        <xs:restriction base="xs:double">
+            <xs:minExclusive value="0"/>
+            <xs:maxExclusive value="180"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:complexType name="Components">
+        <xs:sequence>
+            <!-- Components with relevance to the viewpoint. They should be displayed highlighted or selected in a viewer -->
+            <xs:element name="Selection" type="ComponentSelection" minOccurs="0"/>
+            <xs:element name="Visibility" type="ComponentVisibility" minOccurs="0"/>
+            <xs:element name="Coloring" type="ComponentColoring" minOccurs="0"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ComponentSelection">
+        <xs:sequence>
+            <xs:element name="Component" type="Component" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ComponentVisibility">
+        <xs:sequence>
+            <xs:element name="ViewSetupHints" type="ViewSetupHints" minOccurs="0"/>
+            <xs:element name="Exceptions" minOccurs="0">
+                <!-- List Components that are different than the DefaultVisibility. E.g. if DefaultVisibility = false then list
+                     Components that should be visible -->
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Component" type="Component" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+        <xs:attribute name="DefaultVisibility" type="xs:boolean" default="false"/>
+    </xs:complexType>
+    <xs:complexType name="ViewSetupHints">
+        <xs:attribute name="SpacesVisible" type="xs:boolean" default="false"/>
+        <xs:attribute name="SpaceBoundariesVisible" type="xs:boolean" default="false"/>
+        <xs:attribute name="OpeningsVisible" type="xs:boolean" default="false"/>
+    </xs:complexType>
+    <xs:complexType name="ComponentColoring">
+        <xs:sequence>
+            <xs:element name="Color" minOccurs="0" maxOccurs="unbounded">
+                <xs:complexType>
+                    <xs:sequence>
+                        <!-- At least one component is required for a Color. -->
+                        <xs:element name="Components">
+                            <xs:complexType>
+                                <xs:sequence>
+                                    <xs:element name="Component" type="Component" maxOccurs="unbounded"/>
+                                </xs:sequence>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                    <xs:attribute ref="Color" use="required"/>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Component">
+        <xs:sequence>
+            <xs:element name="OriginatingSystem" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="AuthoringToolId" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute ref="IfcGuid"/>
+    </xs:complexType>
+    <xs:attribute name="Color">
+        <xs:simpleType>
+            <xs:restriction base="xs:normalizedString">
+                <!-- Should either match 3 or 4 hex bytes , e.g. "FF00FF" or "FF00FF99" -->
+                <xs:pattern value="[0-9A-Fa-f]{6}([0-9A-Fa-f]{2})?"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:attribute>
+    <xs:attribute name="IfcGuid">
+        <xs:simpleType>
+            <xs:restriction base="xs:normalizedString">
+                <xs:length value="22"/>
+                <xs:pattern value="[0-9A-Za-z_$]*"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:attribute>
+    <xs:complexType name="Line">
+        <xs:sequence>
+            <xs:element name="StartPoint" type="Point"/>
+            <xs:element name="EndPoint" type="Point"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ClippingPlane">
+        <xs:sequence>
+            <xs:element name="Location" type="Point"/>
+            <xs:element name="Direction" type="Direction"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Bitmap">
+        <xs:sequence>
+            <xs:element name="Format" type="BitmapFormat"/>
+            <!-- Name of the bitmap file in the topic folder -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString"/>
+            <!-- Location of the center of the bitmap -->
+            <xs:element name="Location" type="Point"/>
+            <!-- Normal of the bitmap -->
+            <xs:element name="Normal" type="Direction"/>
+            <!-- Upvector of the bitmap -->
+            <xs:element name="Up" type="Direction"/>
+            <!-- Height of the bitmap -->
+            <xs:element name="Height" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:simpleType name="BitmapFormat">
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="png"/>
+            <xs:enumeration value="jpg"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>

src/blenderbim/Makefile

@@ -1,45 +1,6 @@
 VERSION:=`date '+%y%m%d'`
 PYVERSION:=py37
 
-ifeq ($(PLATFORM), win)
-ifeq ($(PYVERSION), py37)
-PYTHONOCC_URL:=https://anaconda.org/DLR-SC/pythonocc-core/0.17.3/download/win-64/pythonocc-core-0.17.3-py37he980bc4_10.tar.bz2
-OCE_URL:=https://anaconda.org/DLR-SC/oce/0.17.2/download/win-64/oce-0.17.2-he980bc4_14.tar.bz2
-TBB_URL:=https://anaconda.org/DLR-SC/tbb/2019.5/download/win-64/tbb-2019.5-he980bc4_0.tar.bz2
-endif
-ifeq ($(PYVERSION), py39)
-PYTHONOCC_URL:=https://anaconda.org/conda-forge/pythonocc-core/7.4.1/download/win-64/pythonocc-core-7.4.1-py39h3d1c7c5_0.tar.bz2
-OCE_URL:=https://anaconda.org/conda-forge/occt/7.4.0/download/win-64/occt-7.4.0-h823b557_3.tar.bz2
-TBB_URL:=https://anaconda.org/conda-forge/tbb/2020.2/download/win-64/tbb-2020.2-h2d74725_4.tar.bz2
-endif
-endif
-
-ifeq ($(PLATFORM), macos)
-ifeq ($(PYVERSION), py37)
-PYTHONOCC_URL:=https://anaconda.org/DLR-SC/pythonocc-core/0.17.3/download/osx-64/pythonocc-core-0.17.3-py37h04f5b5a_10.tar.bz2
-OCE_URL:=https://anaconda.org/DLR-SC/oce/0.17.2/download/osx-64/oce-0.17.2-h04f5b5a_12.tar.bz2
-TBB_URL:=https://anaconda.org/DLR-SC/tbb/4.3.6/download/osx-64/tbb-4.3.6-0.tar.bz2
-endif
-ifeq ($(PYVERSION), py39)
-PYTHONOCC_URL:=https://anaconda.org/conda-forge/pythonocc-core/7.4.1/download/osx-64/pythonocc-core-7.4.1-py39h4d29fe3_0.tar.bz2
-OCE_URL:=https://anaconda.org/conda-forge/occt/7.4.0/download/osx-64/occt-7.4.0-hb9b6dc7_3.tar.bz2
-TBB_URL:=https://anaconda.org/conda-forge/tbb/2020.2/download/osx-64/tbb-2020.2-h940c156_4.tar.bz2
-endif
-endif
-
-ifeq ($(PLATFORM), linux)
-ifeq ($(PYVERSION), py37)
-PYTHONOCC_URL:=https://anaconda.org/DLR-SC/pythonocc-core/0.17.3/download/linux-64/pythonocc-core-0.17.3-py37h6bb024c_10.tar.bz2
-OCE_URL:=https://anaconda.org/DLR-SC/oce/0.17.2/download/linux-64/oce-0.17.2-h6bb024c_14.tar.bz2
-TBB_URL:=https://anaconda.org/DLR-SC/tbb/4.3.6/download/linux-64/tbb-4.3.6-0.tar.bz2
-endif
-ifeq ($(PYVERSION), py39)
-PYTHONOCC_URL:=https://anaconda.org/conda-forge/pythonocc-core/7.4.1/download/linux-64/pythonocc-core-7.4.1-py39h465cb30_0.tar.bz2
-OCE_URL:=https://anaconda.org/conda-forge/occt/7.4.0/download/linux-64/occt-7.4.0-h9121d39_3.tar.bz2
-TBB_URL:=https://anaconda.org/conda-forge/tbb/2020.2/download/linux-64/tbb-2020.2-h4bd325d_4.tar.bz2
-endif
-endif
-
 .PHONY: dist
 dist:
 ifndef PLATFORM
@@ -52,10 +13,10 @@ endif
 
 	# Provides IfcOpenShell Python functionality
 ifeq ($(PYVERSION), py37)
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-37-v0.6.0-ff7219b-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-37-v0.6.0-2fd2b49-$(PLATFORM)64.zip
 endif
 ifeq ($(PYVERSION), py39)
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-39-v0.6.0-ff7219b-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-39-v0.6.0-2fd2b49-$(PLATFORM)64.zip
 endif
 	cd dist/working && unzip ifcblender*
 	cp -r dist/working/io_import_scene_ifc/ifcopenshell dist/blenderbim/libs/site/packages/
@@ -67,7 +28,7 @@ endif
 
 	# Provides IfcConvert for construction documentation
 	mkdir dist/working
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.6.0-517b819-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.6.0-81ad689-$(PLATFORM)64.zip
 	cd dist/working && unzip IfcConvert*
 ifeq ($(PLATFORM), win)
 	cp -r dist/working/IfcConvert.exe dist/blenderbim/libs/
@@ -76,66 +37,6 @@ else
 endif
 	rm -rf dist/working
 
-	# Provides Python OCC functionality for cutting IFC geometry for construction documentation
-	mkdir dist/working
-	cd dist/working && wget $(PYTHONOCC_URL)
-	cd dist/working && tar -xjvf pythonocc-core*
-ifeq ($(PLATFORM), win)
-	cd dist/working && cp -r Lib/site-packages/OCC ../blenderbim/libs/site/packages/
-else
-ifeq ($(PYVERSION), py37)
-	cd dist/working && cp -r lib/python3.7/site-packages/OCC ../blenderbim/libs/site/packages/
-endif
-ifeq ($(PYVERSION), py39)
-	cd dist/working && cp -r lib/python3.9/site-packages/OCC ../blenderbim/libs/site/packages/
-endif
-endif
-	rm -rf dist/working
-
-	# Required by Python OCC
-	mkdir dist/working
-	cd dist/working && wget $(OCE_URL)
-	cd dist/working && tar -xjvf oc*
-ifeq ($(PLATFORM), win)
-ifeq ($(PYVERSION), py37)
-	cd dist/working && cp -r Library/bin/* ../blenderbim/libs/site/packages/OCC/
-endif
-ifeq ($(PYVERSION), py39)
-	cd dist/working && cp -r Library/bin/* ../blenderbim/libs/site/packages/OCC/Core/
-endif
-else
-	# Unix Conda builds of PythonOCC expect OCE libs to have a RPATH of ../../../
-	cd dist/working && cp -r lib/* ../blenderbim/libs/
-endif
-ifeq ($(PLATFORM), linux)
-	rm -rf dist/blenderbim/libs/oce-0.17
-endif
-	rm -rf dist/working
-
-	# Required by OpenCascade
-	mkdir dist/working
-	cd dist/working && wget $(TBB_URL)
-	cd dist/working && tar -xjvf tbb*
-ifeq ($(PLATFORM), win)
-ifeq ($(PYVERSION), py37)
-	cd dist/working && cp -r Library/bin/* ../blenderbim/libs/site/packages/OCC/
-endif
-ifeq ($(PYVERSION), py39)
-	cd dist/working && cp -r Library/bin/* ../blenderbim/libs/site/packages/OCC/Core/
-endif
-else
-	cd dist/working && cp -r lib/* ../blenderbim/libs/
-endif
-	rm -rf dist/working
-
-ifeq ($(PLATFORM), macos)
-	mkdir dist/working
-	cd dist/working && wget https://blenderbim.org/builds/patch-blender28-bim-macos.zip
-	cd dist/working && unzip patch*
-	cd dist/working && cp -r *.dylib ../blenderbim/libs/
-	rm -rf dist/working
-endif
-
 	# Provides dependencies that are part of IfcOpenShell
 	mkdir dist/working
 	cd dist/working && wget https://github.com/IfcOpenShell/IfcOpenShell/archive/v0.6.0.zip
@@ -161,6 +62,8 @@ endif
 	cp -r dist/working/IfcOpenShell-0.6.0/src/ifccsv/* dist/blenderbim/libs/site/packages/
 	# Provides IFCPatch functionality
 	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcpatch/ifcpatch dist/blenderbim/libs/site/packages/
+	# Provides IFCP6 functionality
+	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcp6/ifcp6 dist/blenderbim/libs/site/packages/
 	rm -rf dist/working
 
 	# Provides Mustache templating in construction documentation
@@ -191,6 +94,20 @@ endif
 	cp -r dist/working/isodate-0.6.0/src/isodate dist/blenderbim/libs/site/packages/
 	rm -rf dist/working
 
+	# Provides networkx graph analysis for project dependency calculations
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/b0/21/adfbf6168631e28577e4af9eb9f26d75fe72b2bb1d33762a5f2c425e6c2a/networkx-2.5.1.tar.gz
+	cd dist/working && tar -xzvf networkx*
+	cp -r dist/working/networkx-2.5.1/networkx dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by networkx
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/4f/51/15a4f6b8154d292e130e5e566c730d8ec6c9802563d58760666f1818ba58/decorator-5.0.9.tar.gz
+	cd dist/working && tar -xzvf decorator*
+	cp -r dist/working/decorator-5.0.9/src/decorator.py dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
 	# Provides jsgantt-improved supports for web-based construction sequencing gantt charts
 	mkdir dist/working
 	cd dist/working && wget https://raw.githubusercontent.com/jsGanttImproved/jsgantt-improved/master/dist/jsgantt.js

src/blenderbim/blenderbim/__init__.py

@@ -15,6 +15,7 @@ import site
 
 # process *.pth in /libs/site/packages to setup globally importable modules
 # 3 levels deep required by occ static ../../ path
+# TODO: 3 levels deep is no longer required as we no longer bundle OCC
 cwd = os.path.dirname(os.path.realpath(__file__))
 site.addsitedir(os.path.join(cwd, "libs", "site", "packages"))
 

src/blenderbim/blenderbim/bim/__init__.py

@@ -6,14 +6,16 @@ bpy = sys.modules.get("bpy")
 if bpy is not None:
     import bpy
     import importlib
-    from . import handler, ui, prop, operator, gizmos
+    from . import handler, ui, prop, operator
 
     modules = {
         "project": None,
+        "parametric": None,
         "search": None,
         "bcf": None,
         "root": None,
         "unit": None,
+        "model": None,
         "georeference": None,
         "context": None,
         "drawing": None,
@@ -29,10 +31,10 @@ if bpy is not None:
         "sequence": None,
         "group": None,
         "structural": None,
+        "boundary": None,
         "material": None,
         "style": None,
         "layer": None,
-        "model": None,
         "owner": None,
         "pset": None,
         "qto": None,
@@ -61,97 +63,34 @@ if bpy is not None:
         operator.ExportIFC,
         operator.ImportIFC,
         operator.SelectExternalMaterialDir,
-        operator.AddSweptSolid,
-        operator.RemoveSweptSolid,
-        operator.AssignSweptSolidOuterCurve,
-        operator.SelectSweptSolidOuterCurve,
-        operator.AddSweptSolidInnerCurve,
-        operator.SelectSweptSolidInnerCurves,
-        operator.AssignSweptSolidExtrusion,
-        operator.SelectSweptSolidExtrusion,
         operator.FetchExternalMaterial,
         operator.FetchObjectPassport,
-        operator.CutSection,
-        operator.AddSheet,
-        operator.OpenSheet,
-        operator.AddDrawingToSheet,
-        operator.CreateSheets,
-        operator.OpenView,
-        operator.OpenViewCamera,
-        operator.ActivateView,
         operator.OpenUpstream,
         operator.AddSectionPlane,
         operator.RemoveSectionPlane,
         operator.ReloadIfcFile,
         operator.AddIfcFile,
         operator.RemoveIfcFile,
-        operator.SelectDocIfcFile,
-        operator.AddAnnotation,
-        operator.GenerateReferences,
-        operator.ResizeText,
-        operator.AddVariable,
-        operator.RemoveVariable,
-        operator.PropagateTextData,
         operator.SetOverrideColour,
-        operator.RemoveDrawing,
-        operator.AddDrawingStyle,
-        operator.RemoveDrawingStyle,
-        operator.SaveDrawingStyle,
-        operator.ActivateDrawingStyle,
-        operator.EditVectorStyle,
-        operator.RemoveSheet,
-        operator.AddSchedule,
-        operator.RemoveSchedule,
-        operator.SelectScheduleFile,
-        operator.BuildSchedule,
-        operator.AddScheduleToSheet,
         operator.SetViewportShadowFromSun,
-        operator.AddDrawingStyleAttribute,
-        operator.RemoveDrawingStyleAttribute,
         operator.CopyPropertyToSelection,
         operator.CopyAttributeToSelection,
-        operator.RefreshDrawingList,
-        operator.CleanWireframes,
         operator.LinkIfc,
         operator.SnapSpacesTogether,
-        operator.CopyGrid,
-        operator.AddSectionsAnnotations,
         prop.StrProperty,
         prop.Attribute,
-        prop.Variable,
-        prop.Drawing,
-        prop.Schedule,
-        prop.DrawingStyle,
-        prop.Sheet,
         prop.BIMProperties,
-        prop.DocProperties,
         prop.IfcParameter,
         prop.PsetQto,
         prop.GlobalId,
-        prop.RepresentationItem,
         prop.BIMObjectProperties,
         prop.BIMMaterialProperties,
-        prop.SweptSolid,
         prop.ItemSlotMap,
         prop.BIMMeshProperties,
-        prop.BIMCameraProperties,
-        prop.BIMTextProperties,
         ui.BIM_PT_section_plane,
-        ui.BIM_PT_drawings,
-        ui.BIM_PT_schedules,
-        ui.BIM_PT_sheets,
-        ui.BIM_PT_text,
-        ui.BIM_PT_annotation_utilities,
-        ui.BIM_PT_misc_utilities,
         ui.BIM_UL_generic,
-        ui.BIM_UL_drawinglist,
         ui.BIM_UL_topics,
         ui.BIM_ADDON_preferences,
-        gizmos.UglyDotGizmo,
-        gizmos.DotGizmo,
-        gizmos.DimensionLabelGizmo,
-        gizmos.ExtrusionGuidesGizmo,
-        gizmos.ExtrusionWidget
     ]
 
     for module in modules.values():
@@ -171,30 +110,29 @@ if bpy is not None:
         for cls in classes:
             bpy.utils.register_class(cls)
         bpy.app.handlers.depsgraph_update_post.append(on_register)
+        bpy.app.handlers.undo_post.append(handler.undo_post)
+        bpy.app.handlers.redo_post.append(handler.redo_post)
         bpy.app.handlers.load_post.append(handler.setDefaultProperties)
         bpy.app.handlers.load_post.append(handler.loadIfcStore)
         bpy.app.handlers.save_pre.append(handler.ensureIfcExported)
         bpy.types.TOPBAR_MT_file_export.append(menu_func_export)
         bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
         bpy.types.Scene.BIMProperties = bpy.props.PointerProperty(type=prop.BIMProperties)
-        bpy.types.Scene.DocProperties = bpy.props.PointerProperty(type=prop.DocProperties)
         bpy.types.Object.BIMObjectProperties = bpy.props.PointerProperty(type=prop.BIMObjectProperties)
         bpy.types.Material.BIMObjectProperties = bpy.props.PointerProperty(type=prop.BIMObjectProperties)
-        bpy.types.Collection.BIMObjectProperties = bpy.props.PointerProperty(type=prop.BIMObjectProperties) # Check if we need this
+        bpy.types.Collection.BIMObjectProperties = bpy.props.PointerProperty(
+            type=prop.BIMObjectProperties
+        )  # Check if we need this
         bpy.types.Material.BIMMaterialProperties = bpy.props.PointerProperty(type=prop.BIMMaterialProperties)
         bpy.types.Mesh.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
         bpy.types.Curve.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
         bpy.types.Camera.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
-        bpy.types.Camera.BIMCameraProperties = bpy.props.PointerProperty(type=prop.BIMCameraProperties)
-        bpy.types.TextCurve.BIMTextProperties = bpy.props.PointerProperty(type=prop.BIMTextProperties)
+        bpy.types.PointLight.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
         bpy.types.SCENE_PT_unit.append(ui.ifc_units)
 
         for module in modules.values():
             module.register()
 
-        bpy.app.handlers.depsgraph_update_pre.append(operator.depsgraph_update_pre_handler)
-        bpy.app.handlers.load_post.append(handler.toggleDecorationsOnLoad)
-
     def unregister():
         for cls in reversed(classes):
             bpy.utils.unregister_class(cls)
@@ -204,20 +142,15 @@ if bpy is not None:
         bpy.types.TOPBAR_MT_file_export.remove(menu_func_export)
         bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
         del bpy.types.Scene.BIMProperties
-        del bpy.types.Scene.DocProperties
         del bpy.types.Object.BIMObjectProperties
         del bpy.types.Material.BIMObjectProperties
-        del bpy.types.Collection.BIMObjectProperties # Check if we need this
+        del bpy.types.Collection.BIMObjectProperties  # Check if we need this
         del bpy.types.Material.BIMMaterialProperties
         del bpy.types.Mesh.BIMMeshProperties
         del bpy.types.Curve.BIMMeshProperties
         del bpy.types.Camera.BIMMeshProperties
-        del bpy.types.Camera.BIMCameraProperties
-        del bpy.types.TextCurve.BIMTextProperties
+        del bpy.types.PointLight.BIMMeshProperties
         bpy.types.SCENE_PT_unit.remove(ui.ifc_units)
 
         for module in reversed(list(modules.values())):
             module.unregister()
-
-        bpy.app.handlers.depsgraph_update_pre.remove(operator.depsgraph_update_pre_handler)
-        bpy.app.handlers.load_post.remove(handler.toggleDecorationsOnLoad)

src/blenderbim/blenderbim/bim/cut_ifc.py

@@ -1,552 +0,0 @@
-import os
-import re
-import math
-import time
-import numpy
-import pickle
-import multiprocessing
-
-
-def load_occ():
-    # Don't import until we really need to, as a temporary step before we can purge OCC
-    try:
-        from OCC.Core import (
-            gp,
-            Geom,
-            Bnd,
-            BRepBndLib,
-            BRep,
-            BRepPrimAPI,
-            BRepAlgoAPI,
-            BRepBuilderAPI,
-            TopOpeBRepTool,
-            TopOpeBRepBuild,
-            ShapeExtend,
-            GProp,
-            BRepGProp,
-            GC,
-            ShapeAnalysis,
-            TopTools,
-            TopExp,
-            TopAbs,
-            HLRAlgo,
-            HLRBRep,
-            TopLoc,
-            Bnd,
-            BRepBndLib,
-            BRepTools,
-            TopoDS,
-            GeomLProp,
-            IntCurvesFace,
-        )
-        from OCC.Core.TopoDS import topods
-    except ImportError:
-        from OCC import (
-            gp,
-            Geom,
-            Bnd,
-            BRepBndLib,
-            BRep,
-            BRepPrimAPI,
-            BRepAlgoAPI,
-            BRepBuilderAPI,
-            TopOpeBRepTool,
-            TopOpeBRepBuild,
-            ShapeExtend,
-            GProp,
-            BRepGProp,
-            GC,
-            ShapeAnalysis,
-            TopTools,
-            TopExp,
-            TopAbs,
-            HLRAlgo,
-            HLRBRep,
-            TopLoc,
-            Bnd,
-            BRepBndLib,
-            BRepTools,
-            TopoDS,
-            GeomLProp,
-            IntCurvesFace,
-        )
-        from OCC.TopoDS import topods
-
-import ifcopenshell
-import ifcopenshell.geom
-import ifcopenshell.util.selector
-import ifcopenshell.util.element
-
-cwd = os.path.dirname(os.path.realpath(__file__))
-this_file = os.path.join(cwd, "cut_ifc.py")
-
-
-def get_booleaned_edges(shape):
-    load_occ()
-    edges = []
-    exp = TopExp.TopExp_Explorer(shape, TopAbs.TopAbs_EDGE)
-    while exp.More():
-        edges.append(topods.Edge(exp.Current()))
-        exp.Next()
-    return edges
-
-
-def connect_edges_into_wires(unconnected_edges):
-    load_occ()
-    edges = TopTools.TopTools_HSequenceOfShape()
-    edges_handle = TopTools.Handle_TopTools_HSequenceOfShape(edges)
-    wires = TopTools.TopTools_HSequenceOfShape()
-    wires_handle = TopTools.Handle_TopTools_HSequenceOfShape(wires)
-
-    for edge in unconnected_edges:
-        edges.Append(edge)
-
-    ShapeAnalysis.ShapeAnalysis_FreeBounds.ConnectEdgesToWires(edges_handle, 1e-5, True, wires_handle)
-    return wires_handle.GetObject()
-
-
-def do_cut(process_data):
-    load_occ()
-    global_id, shape, section, trsf_data = process_data
-
-    axis = gp.gp_Ax2(
-        gp.gp_Pnt(trsf_data["top_left_corner"][0], trsf_data["top_left_corner"][1], trsf_data["top_left_corner"][2]),
-        gp.gp_Dir(trsf_data["projection"][0], trsf_data["projection"][1], trsf_data["projection"][2]),
-        gp.gp_Dir(trsf_data["x_axis"][0], trsf_data["x_axis"][1], trsf_data["x_axis"][2]),
-    )
-    source = gp.gp_Ax3(axis)
-    destination = gp.gp_Ax3(gp.gp_Pnt(0, 0, 0), gp.gp_Dir(0, 0, -1), gp.gp_Dir(1, 0, 0))
-    transformation = gp.gp_Trsf()
-    transformation.SetDisplacement(source, destination)
-
-    cut_polygons = []
-    section = BRepAlgoAPI.BRepAlgoAPI_Section(section, shape).Shape()
-    section_edges = get_booleaned_edges(section)
-    if len(section_edges) <= 0:
-        return cut_polygons
-    wires = connect_edges_into_wires(section_edges)
-    for i in range(wires.Length()):
-        wire_shape = wires.Value(i + 1)
-
-        transformed_wire = BRepBuilderAPI.BRepBuilderAPI_Transform(wire_shape, transformation)
-        wire_shape = transformed_wire.Shape()
-
-        wire = topods.Wire(wire_shape)
-        face = BRepBuilderAPI.BRepBuilderAPI_MakeFace(wire).Face()
-
-        points = []
-        exp = BRepTools.BRepTools_WireExplorer(wire)
-        while exp.More():
-            point = BRep.BRep_Tool.Pnt(exp.CurrentVertex())
-            points.append((point.X(), -point.Y()))
-            exp.Next()
-        cut_polygons.append({"global_id": global_id, "metadata": {}, "points": points})
-    return cut_polygons
-
-
-class IfcCutter:
-    def __init__(self):
-        self.time = None
-        self.selector = ifcopenshell.util.selector.Selector()
-        self.product_shapes = []
-        self.background_elements = []
-        self.cut_polygons = []
-        self.template_variables = {}
-        self.metadata = {}
-        self.data_dir = ""
-        self.vector_style = ""
-        self.ifc_filenames = []
-        self.ifc_files = {}
-        self.resolved_pixels = set()
-        self.text_pickle_file = "text.pickle"
-        self.metadata_pickle_file = "metadata.pickle"
-        self.cut_pickle_file = "cut.pickle"
-        self.should_recut = True
-        self.should_recut_selected = True
-        self.cut_objects = ""
-        self.selected_global_ids = []
-        self.should_extract = True
-        self.diagram_name = None
-        self.background_image = None
-        self.section_box = {
-            "projection": (0, 1, 0),
-            "x_axis": (1, 0, 0),
-            "y_axis": (0, 0, -1),
-            "top_left_corner": (-2, 2, 8),
-            "x": 14,
-            "y": 9,
-            "z": 2,
-            "shape": None,
-            "face": None,
-        }
-
-    def cut(self):
-        self.profile_code("Starting cut process")
-        self.load_ifc_files()
-        self.profile_code("Load IFC files")
-        self.get_template_variables()
-        self.profile_code("Get template variables")
-        self.get_product_shapes()
-        self.profile_code("Get product shapes")
-        self.create_section_box()
-        self.profile_code("Create section box")
-        self.get_cut_polygons()
-        self.profile_code("Get cut polygons")
-        self.get_annotation()
-        self.profile_code("Get annotation")
-        self.get_cut_polygon_metadata()
-        self.profile_code("Get cut polygon metadata")
-
-    def profile_code(self, message):
-        if not self.time:
-            self.time = time.time()
-        print("{} :: {:.2f}".format(message, time.time() - self.time))
-        self.time = time.time()
-
-    def load_ifc_files(self):
-        if not self.should_recut and not self.should_extract:
-            return
-
-        loaded_files = []
-        for filename in self.ifc_filenames:
-            print("Loading file {} ...".format(filename))
-            if filename:
-                self.ifc_files[filename] = ifcopenshell.open(filename)
-
-    def get_template_variables(self):
-        if not self.should_extract:
-            if os.path.isfile(self.text_pickle_file):
-                with open(self.text_pickle_file, "rb") as text_file:
-                    self.template_variables = pickle.load(text_file)
-            return
-
-        data = {}
-        for text_obj in self.text_objs:
-            text_obj_data = self.get_text_variables(text_obj)
-            if text_obj_data:
-                data[text_obj.name] = text_obj_data
-
-        with open(self.text_pickle_file, "wb") as text_file:
-            pickle.dump(data, text_file, protocol=pickle.HIGHEST_PROTOCOL)
-
-        self.template_variables = data
-
-    def get_text_variables(self, text_obj):
-        text_obj_data = {}
-        text_body = text_obj.data.body
-        related_element = text_obj.data.BIMTextProperties.related_element
-        if not related_element:
-            return
-        global_id = related_element.BIMObjectProperties.attributes.get("GlobalId")
-        if not global_id:
-            return
-        element = self.get_ifc_element(global_id.string_value)
-        for variable in text_obj.data.BIMTextProperties.variables:
-            if element:
-                if "{{" in variable.prop_key:
-                    prop_key = variable.prop_key.split("{{")[1].split("}}")[0]
-                    prop_value = self.selector.get_element_value(element, prop_key)
-                    variable_value = eval(variable.prop_key.replace("{{" + prop_key + "}}", str(prop_value)))
-                else:
-                    variable_value = self.selector.get_element_value(element, variable.prop_key)
-                text_obj_data[variable.name] = variable_value
-        return text_obj_data
-
-    def get_product_shapes(self):
-        if not self.should_recut:
-            return
-
-        settings = ifcopenshell.geom.settings()
-        settings.set(settings.USE_PYTHON_OPENCASCADE, True)
-        products = []
-
-        for filename, ifc_file in self.ifc_files.items():
-            shape_pickle = os.path.join(
-                self.data_dir, "cache", "shapes", "{}.pickle".format(os.path.basename(filename))
-            )
-            shape_map = {}
-            if self.should_recut_selected and os.path.isfile(shape_pickle):
-                with open(shape_pickle, "rb") as shape_file:
-                    shape_map = pickle.load(shape_file)
-
-            products.extend(self.selector.parse(ifc_file, self.cut_objects))
-
-            selected_elements = []
-            for i, product in enumerate(products):
-                if (
-                    product.is_a("IfcOpeningElement")
-                    or product.is_a("IfcSite")
-                    or product.Representation is None
-                    or self.has_annotation(product)
-                ):
-                    continue
-                try:
-                    if self.should_recut_selected and product.GlobalId in self.selected_global_ids:
-                        selected_elements.append(product)
-                    elif product.GlobalId in shape_map:
-                        shape = shape_map[product.GlobalId]
-                        self.add_product_shape(product, shape)
-                    else:
-                        selected_elements.append(product)
-                except:
-                    print("Failed to create shape for {}".format(product))
-
-            if selected_elements:
-                total = 0
-                checkpoint = time.time()
-                iterator = ifcopenshell.geom.iterator(
-                    settings, ifc_file, multiprocessing.cpu_count(), include=selected_elements
-                )
-                valid_file = iterator.initialize()
-                if valid_file:
-                    while True:
-                        total += 1
-                        if total % 250 == 0:
-                            print("{} elements processed in {:.2f}s ...".format(total, time.time() - checkpoint))
-                            checkpoint = time.time()
-                        shape = iterator.get()
-                        shape_map[shape.data.guid] = shape.geometry
-                        self.add_product_shape(ifc_file.by_guid(shape.data.guid), shape.geometry)
-                        if not iterator.next():
-                            break
-
-            with open(shape_pickle, "wb") as shape_file:
-                pickle.dump(shape_map, shape_file, protocol=pickle.HIGHEST_PROTOCOL)
-
-    def add_product_shape(self, product, shape):
-        self.product_shapes.append((product, shape))
-
-    def has_annotation(self, element):
-        for representation in element.Representation.Representations:
-            if (
-                representation.ContextOfItems.ContextType == "Plan"
-                and representation.ContextOfItems.ContextIdentifier == "Annotation"
-            ):
-                return True
-        return False
-
-    def create_section_box(self):
-        load_occ()
-        top_left_corner = gp.gp_Pnt(
-            self.section_box["top_left_corner"][0],
-            self.section_box["top_left_corner"][1],
-            self.section_box["top_left_corner"][2],
-        )
-        axis = gp.gp_Ax2(
-            top_left_corner,
-            gp.gp_Dir(
-                self.section_box["projection"][0], self.section_box["projection"][1], self.section_box["projection"][2]
-            ),
-            gp.gp_Dir(self.section_box["x_axis"][0], self.section_box["x_axis"][1], self.section_box["x_axis"][2]),
-        )
-        section_box = BRepPrimAPI.BRepPrimAPI_MakeBox(
-            axis, self.section_box["x"], self.section_box["y"], self.section_box["z"]
-        )
-        self.section_box["shape"] = section_box.Shape()
-        self.section_box["face"] = section_box.BottomFace()
-
-        source = gp.gp_Ax3(axis)
-        self.transformation_data = {
-            "top_left_corner": self.section_box["top_left_corner"],
-            "projection": self.section_box["projection"],
-            "x_axis": self.section_box["x_axis"],
-        }
-        destination = gp.gp_Ax3(gp.gp_Pnt(0, 0, 0), gp.gp_Dir(0, 0, -1), gp.gp_Dir(1, 0, 0))
-        self.transformation_dest = destination
-        self.transformation = gp.gp_Trsf()
-        self.transformation.SetDisplacement(source, destination)
-
-    def get_bbox(self, shape):
-        load_occ()
-        bbox = Bnd.Bnd_Box()
-        BRepBndLib.brepbndlib_Add(shape, bbox)
-        return bbox
-
-    def calculate_face_zpos(self, face):
-        bbox = self.get_bbox(face)
-        xmin, ymin, zmin, xmax, ymax, zmax = bbox.Get()
-        zpos = zmin + ((zmax - zmin) / 2)
-        return zpos, zmax
-
-    def get_booleaned_edges(self, shape):
-        load_occ()
-        edges = []
-        exp = TopExp.TopExp_Explorer(shape, TopAbs.TopAbs_EDGE)
-        while exp.More():
-            edges.append(topods.Edge(exp.Current()))
-            exp.Next()
-        return edges
-
-    def get_cut_polygons(self):
-        if self.should_recut:
-            self.get_fresh_cut_polygons()
-            self.pickle_cut_polygons()
-        else:
-            self.get_pickled_cut_polygons()
-
-    def get_annotation(self):
-        import mathutils
-        load_occ()
-
-        self.annotation_objs = []
-        settings_2d = ifcopenshell.geom.settings()
-        settings_2d.set(settings_2d.INCLUDE_CURVES, True)
-        settings_py = ifcopenshell.geom.settings()
-        settings_py.set(settings_py.USE_PYTHON_OPENCASCADE, True)
-        for ifc_file in self.ifc_files.values():
-            for element in ifc_file.by_type("IfcElement"):
-                annotation_representation = None
-                box_representation = None
-                if not element.Representation:
-                    continue # This can occur for aggregates
-                for representation in element.Representation.Representations:
-                    if (
-                        representation.ContextOfItems.ContextType == "Plan"
-                        and representation.ContextOfItems.ContextIdentifier == "Annotation"
-                    ):
-                        annotation_representation = representation
-                    elif (
-                        representation.ContextOfItems.ContextType == "Model"
-                        and representation.ContextOfItems.ContextIdentifier == "Box"
-                    ):
-                        box_representation = representation
-                if not annotation_representation or not box_representation:
-                    continue
-
-                # This is bad code. See bug #85 to make it slightly less bad.
-                # Effectively if the bbox does not intersect with the camera
-                # plane, then we should "continue" and not process the 2D
-                # wireframe. This approach works but is not very smart.
-                for subelement in ifc_file.traverse(box_representation):
-                    if subelement.is_a("IfcBoundingBox"):
-                        block = ifc_file.createIfcBlock(
-                            ifc_file.createIfcAxis2Placement3D(subelement.Corner, None, None),
-                            subelement.XDim,
-                            subelement.YDim,
-                            subelement.ZDim,
-                        )
-                        for inverse in ifc_file.get_inverse(subelement):
-                            ifcopenshell.util.element.replace_attribute(inverse, subelement, block)
-                element.Representation.Representations = [box_representation]
-                shape = ifcopenshell.geom.create_shape(settings_py, element)
-
-                section = BRepAlgoAPI.BRepAlgoAPI_Section(self.section_box["face"], shape.geometry).Shape()
-                section_edges = get_booleaned_edges(section)
-
-                if len(section_edges) <= 0:
-                    # The bounding box of the annotation object does not
-                    # intersect with the camera plane, so don't bother drawing
-                    # the annotation
-                    continue
-
-                # Monkey patch - see bug #771.
-                element.Representation.Representations = [annotation_representation]
-                shape = ifcopenshell.geom.create_shape(settings_2d, element)
-                if hasattr(shape, "geometry"):
-                    geometry = shape.geometry
-                else:
-                    geometry = shape
-                e = geometry.edges
-                v = geometry.verts
-                m = shape.transformation.matrix.data
-                mat = mathutils.Matrix(
-                    ([m[0], m[1], m[2], 0], [m[3], m[4], m[5], 0], [m[6], m[7], m[8], 0], [m[9], m[10], m[11], 1])
-                )
-                mat.transpose()
-                self.annotation_objs.append(
-                    {
-                        "raw": element,
-                        "classes": self.get_classes(element, "annotation"),
-                        "edges": [[e[i], e[i + 1]] for i in range(0, len(e), 2)],
-                        "vertices": [mat @ mathutils.Vector((v[i], v[i + 1], v[i + 2])) for i in range(0, len(v), 3)],
-                    }
-                )
-
-    def get_cut_polygon_metadata(self):
-        if not self.should_extract:
-            if os.path.isfile(self.metadata_pickle_file):
-                with open(self.metadata_pickle_file, "rb") as metadata_file:
-                    self.metadata = pickle.load(metadata_file)
-
-            for polygon in self.cut_polygons:
-                if polygon["global_id"] in self.metadata:
-                    polygon["metadata"] = self.metadata[polygon["global_id"]]
-            return
-
-        for polygon in self.cut_polygons:
-            metadata = {"classes": self.get_classes(self.get_ifc_element(polygon["global_id"]), "cut")}
-            self.metadata[polygon["global_id"]] = metadata
-            polygon["metadata"] = metadata
-
-        with open(self.metadata_pickle_file, "wb") as metadata_file:
-            pickle.dump(self.metadata, metadata_file, protocol=pickle.HIGHEST_PROTOCOL)
-
-    def pickle_cut_polygons(self):
-        with open(self.cut_pickle_file, "wb") as pickle_file:
-            pickle.dump(self.cut_polygons, pickle_file, protocol=pickle.HIGHEST_PROTOCOL)
-
-    def get_fresh_cut_polygons(self):
-        process_data = [
-            (p.GlobalId, s, self.section_box["face"], self.transformation_data) for p, s in self.product_shapes
-        ]
-
-        import bpy
-
-        if bpy.app.version > (2, 90, 0) and os.name == 'nt':
-            # See bug #1148
-            for data in process_data:
-                results = do_cut(data)
-                polygons = [r for r in results if r["points"]]
-                self.cut_polygons.extend(polygons)
-        else:
-            multiprocessing.set_executable(bpy.app.binary_path_python)
-
-            with multiprocessing.Pool(9) as p:
-                results = p.map(do_cut, process_data)
-                for result in results:
-                    polygons = [p for p in result if p["points"]]
-                    self.cut_polygons.extend(polygons)
-
-    def get_polygon_metadata(self, polygon, position):
-        polygon["metadata"] = {"classes": self.get_classes(self.get_ifc_element(polygon["global_id"]), position)}
-        return polygon
-
-    def get_ifc_element(self, global_id):
-        # TODO: make this less bad
-        element = None
-        for ifc_file in self.ifc_files.values():
-            try:
-                element = ifc_file.by_id(global_id)
-                return element
-            except:
-                pass
-
-    def get_classes(self, element, position):
-        classes = [position, element.is_a()]
-        material = ifcopenshell.util.element.get_material(element)
-        if material:
-            classes.append(
-                "material-{}".format(
-                    re.sub("[^0-9a-zA-Z]+", "", self.get_material_name(material))
-                )
-            )
-        classes.append("globalid-{}".format(element.GlobalId))
-        for attribute in self.attributes:
-            result = self.selector.get_element_value(element, attribute)
-            if result:
-                classes.append(
-                    "{}-{}".format(re.sub("[^0-9a-zA-Z]+", "", attribute), re.sub("[^0-9a-zA-Z]+", "", result))
-                )
-        return classes
-
-    def get_material_name(self, element):
-        if hasattr(element, "Name") and element.Name:
-            return element.Name
-        elif hasattr(element, "LayerSetName") and element.LayerSetName:
-            return element.LayerSetName
-        return "mat-" + str(element.id())
-
-    def get_pickled_cut_polygons(self):
-        if os.path.isfile(self.cut_pickle_file):
-            with open(self.cut_pickle_file, "rb") as pickle_file:
-                self.cut_polygons = pickle.load(pickle_file)

src/blenderbim/blenderbim/bim/export_ifc.py

@@ -49,7 +49,6 @@ class IfcExporter:
                     json.dump(jsonData, outfile, indent=None if self.ifc_export_settings.json_compact else 4)
 
     def set_header(self):
-        # TODO: add all metadata, pending bug #747
         self.file.wrapped_data.header.file_name.name = os.path.basename(self.ifc_export_settings.output_file)
         self.file.wrapped_data.header.file_name.time_stamp = (
             datetime.datetime.utcnow()
@@ -62,16 +61,6 @@ class IfcExporter:
         self.file.wrapped_data.header.file_name.originating_system = "{} {}".format(
             self.get_application_name(), self.get_application_version()
         )
-        # TODO: reimplement. See #1222.
-        # if self.owner_history:
-        #    if self.schema_version == "IFC2X3":
-        #        self.file.wrapped_data.header.file_name.authorization = self.owner_history.OwningUser.ThePerson.Id
-        #    else:
-        #        self.file.wrapped_data.header.file_name.authorization = (
-        #            self.owner_history.OwningUser.ThePerson.Identification
-        #        )
-        # else:
-        #    self.file.wrapped_data.header.file_name.authorization = "Nobody"
 
     def sync_object_placements_and_deletions(self):
         self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(self.file)
@@ -94,13 +83,13 @@ class IfcExporter:
             ifcopenshell.api.run("root.remove_product", self.file, **{"product": product})
 
     def sync_edited_objects(self):
-        for obj_name in IfcStore.edited_objs.copy():
-            obj = bpy.data.objects.get(obj_name)
+        for obj in IfcStore.edited_objs.copy():
             if not obj:
                 continue
-            representation = IfcStore.get_file().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
-            if representation.RepresentationType == "Tessellation" or representation.RepresentationType == "Brep":
-                bpy.ops.bim.update_mesh_representation(obj=obj.name)
+            try:
+                bpy.ops.bim.update_representation(obj=obj.name)
+            except ReferenceError:
+                pass  # The object is likely deleted
         IfcStore.edited_objs.clear()
 
     def sync_object_placement(self, obj):
@@ -136,7 +125,11 @@ class IfcExporter:
         elif element.is_a("IfcContext"):
             return
 
-        if (element.is_a("IfcElement") and element_collection) or element.is_a("IfcSpatialStructureElement"):
+        if (
+            (element.is_a("IfcElement") and element_collection)
+            or element.is_a("IfcSpatialStructureElement")
+            or element.is_a("IfcGrid")
+        ):
             try:
                 parent_collection = [c for c in bpy.data.collections if c.children.get(element_collection.name)][0]
             except:
@@ -144,6 +137,7 @@ class IfcExporter:
         else:
             parent_collection = obj.users_collection[0]
 
+
         parent_obj = bpy.data.objects.get(parent_collection.name)
         if not parent_obj or not parent_obj.BIMObjectProperties.ifc_definition_id:
             return

src/blenderbim/blenderbim/bim/handler.py

@@ -1,7 +1,6 @@
 import bpy
 import json
 import addon_utils
-import blenderbim.bim.decoration as decoration
 import ifcopenshell.api.owner.settings
 from bpy.app.handlers import persistent
 from blenderbim.bim.ifc import IfcStore
@@ -9,22 +8,35 @@ from ifcopenshell.api.attribute.data import Data as AttributeData
 from ifcopenshell.api.type.data import Data as TypeData
 
 
+global_subscription_owner = object()
+
+
 def mode_callback(obj, data):
-    for obj in bpy.context.selected_objects:
+    objects = bpy.context.selected_objects
+    if bpy.context.active_object:
+        objects += [bpy.context.active_object]
+    for obj in objects:
         if (
             obj.mode != "EDIT"
             or not obj.data
-            or not isinstance(obj.data, bpy.types.Mesh)
-            or not obj.data.BIMMeshProperties.ifc_definition_id
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
             or not bpy.context.scene.BIMProjectProperties.is_authoring
         ):
             return
-        representation = IfcStore.get_file().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
-        if representation.RepresentationType == "Tessellation" or representation.RepresentationType == "Brep":
-            IfcStore.edited_objs.add(obj.name)
+        if obj.data.BIMMeshProperties.ifc_definition_id:
+            representation = IfcStore.get_file().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
+            if representation.RepresentationType in ["Tessellation", "Brep", "Annotation2D"]:
+                IfcStore.edited_objs.add(obj)
+        elif IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id).is_a("IfcGridAxis"):
+            IfcStore.edited_objs.add(obj)
 
 
 def name_callback(obj, data):
+    try:
+        oby.type
+    except:
+        return  # In case the object RNA is gone during an undo / redo operation
     # Blender material names are up to 63 UTF-8 bytes
     if not obj.BIMObjectProperties.ifc_definition_id or "/" not in obj.name or len(bytes(obj.name, "utf-8")) >= 63:
         return
@@ -34,12 +46,32 @@ def name_callback(obj, data):
     if element.is_a("IfcSpatialStructureElement") or (hasattr(element, "IsDecomposedBy") and element.IsDecomposedBy):
         collection = obj.users_collection[0]
         collection.name = obj.name
+    if element.is_a("IfcGrid"):
+        axis_obj = IfcStore.get_element(element.UAxes[0].id())
+        axis_collection = axis_obj.users_collection[0]
+        grid_collection = None
+        for collection in bpy.data.collections:
+            if axis_collection.name in collection.children.keys():
+                grid_collection = collection
+                break
+        if grid_collection:
+            grid_collection.name = obj.name
     if element.is_a("IfcTypeProduct"):
         TypeData.purge()
     element.Name = "/".join(obj.name.split("/")[1:])
     AttributeData.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
 
 
+def active_object_callback():
+    obj = bpy.context.active_object
+    for obj in bpy.context.selected_objects:
+        if not obj.BIMObjectProperties.ifc_definition_id:
+            continue
+        stored_obj = IfcStore.get_element(obj.BIMObjectProperties.ifc_definition_id)
+        if stored_obj and stored_obj != obj:
+            bpy.ops.bim.copy_class(obj=obj.name)
+
+
 def subscribe_to(object, data_path, callback):
     subscribe_to = object.path_resolve(data_path, False)
     bpy.msgbus.subscribe_rna(
@@ -75,15 +107,29 @@ def purge_module_data():
 def loadIfcStore(scene):
     IfcStore.purge()
     ifc_file = IfcStore.get_file()
+    if not ifc_file:
+        return
     IfcStore.get_schema()
-    [
-        IfcStore.link_element(ifc_file.by_id(o.BIMObjectProperties.ifc_definition_id), o)
-        for o in bpy.data.objects
-        if o.BIMObjectProperties.ifc_definition_id
-    ]
+    IfcStore.reload_linked_elements()
     purge_module_data()
 
 
+@persistent
+def undo_post(scene):
+    if IfcStore.last_transaction != bpy.context.scene.BIMProperties.last_transaction:
+        IfcStore.last_transaction = bpy.context.scene.BIMProperties.last_transaction
+        IfcStore.undo()
+    IfcStore.reload_linked_elements(should_reload_selected=True)
+
+
+@persistent
+def redo_post(scene):
+    if IfcStore.last_transaction != bpy.context.scene.BIMProperties.last_transaction:
+        IfcStore.last_transaction = bpy.context.scene.BIMProperties.last_transaction
+        IfcStore.redo()
+    IfcStore.reload_linked_elements(should_reload_selected=True)
+
+
 @persistent
 def ensureIfcExported(scene):
     if IfcStore.get_file() and not bpy.context.scene.BIMProperties.ifc_file:
@@ -95,14 +141,12 @@ def get_application(ifc):
     for element in ifc.by_type("IfcApplication"):
         if element.ApplicationIdentifier == "BlenderBIM" and element.Version == version:
             return element
-    return ifc.create_entity(
-        "IfcApplication",
-        **{
-            "ApplicationDeveloper": create_application_organisation(ifc),
-            "Version": get_application_version(),
-            "ApplicationFullName": "BlenderBIM Add-on",
-            "ApplicationIdentifier": "BlenderBIM",
-        },
+    return ifcopenshell.api.run(
+        "owner.add_application",
+        ifc,
+        version=get_application_version(),
+        application_full_name="BlenderBIM Add-on",
+        application_identifier="BlenderBIM",
     )
 
 
@@ -119,48 +163,13 @@ def get_application_version():
     )
 
 
-def create_application_organisation(ifc):
-    return ifc.create_entity(
-        "IfcOrganization",
-        **{
-            "Name": "IfcOpenShell",
-            "Description": "IfcOpenShell is an open source (LGPL) software library that helps users and software developers to work with the IFC file format.",
-            "Roles": [ifc.create_entity("IfcActorRole", **{"Role": "USERDEFINED", "UserDefinedRole": "CONTRIBUTOR"})],
-            "Addresses": [
-                ifc.create_entity(
-                    "IfcTelecomAddress",
-                    **{
-                        "Purpose": "USERDEFINED",
-                        "UserDefinedPurpose": "WEBPAGE",
-                        "Description": "The main webpage of the software collection.",
-                        "WWWHomePageURL": "https://ifcopenshell.org",
-                    },
-                ),
-                ifc.create_entity(
-                    "IfcTelecomAddress",
-                    **{
-                        "Purpose": "USERDEFINED",
-                        "UserDefinedPurpose": "WEBPAGE",
-                        "Description": "The BlenderBIM Add-on webpage of the software collection.",
-                        "WWWHomePageURL": "https://blenderbim.org",
-                    },
-                ),
-                ifc.create_entity(
-                    "IfcTelecomAddress",
-                    **{
-                        "Purpose": "USERDEFINED",
-                        "UserDefinedPurpose": "REPOSITORY",
-                        "Description": "The source code repository of the software collection.",
-                        "WWWHomePageURL": "https://github.com/IfcOpenShell/IfcOpenShell.git",
-                    },
-                ),
-            ],
-        },
-    )
-
-
 @persistent
 def setDefaultProperties(scene):
+    global global_subscription_owner
+    active_object_key = bpy.types.LayerObjects, "active"
+    bpy.msgbus.subscribe_rna(
+        key=active_object_key, owner=global_subscription_owner, args=(), notify=active_object_callback
+    )
     ifcopenshell.api.owner.settings.get_person = (
         lambda ifc: ifc.by_id(int(bpy.context.scene.BIMOwnerProperties.user_person))
         if bpy.context.scene.BIMOwnerProperties.user_person
@@ -239,12 +248,3 @@ def setDefaultProperties(scene):
         drawing_style.name = "Blender Default"
         drawing_style.render_type = "DEFAULT"
         bpy.ops.bim.save_drawing_style(index="2")
-
-
-@persistent
-def toggleDecorationsOnLoad(*args):
-    toggle = bpy.context.scene.DocProperties.should_draw_decorations
-    if toggle:
-        decoration.DecorationsHandler.install(bpy.context)
-    else:
-        decoration.DecorationsHandler.uninstall()

src/blenderbim/blenderbim/bim/helper.py

@@ -8,6 +8,32 @@ from mathutils import Vector
 from blenderbim.bim.ifc import IfcStore
 
 
+def draw_attributes(props, layout, copy_operator=None):
+    for attribute in props:
+        row = layout.row(align=True)
+        value = None
+        if attribute.data_type == "string":
+            row.prop(attribute, "string_value", text=attribute.name)
+            value = attribute.string_value
+        elif attribute.data_type == "boolean":
+            row.prop(attribute, "bool_value", text=attribute.name)
+            value = attribute.bool_value
+        elif attribute.data_type == "integer":
+            row.prop(attribute, "int_value", text=attribute.name)
+            value = attribute.int_value
+        elif attribute.data_type == "float":
+            row.prop(attribute, "float_value", text=attribute.name)
+            value = attribute.float_value
+        elif attribute.data_type == "enum":
+            row.prop(attribute, "enum_value", text=attribute.name)
+            value = attribute.enum_value
+        if attribute.is_optional:
+            row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+        if copy_operator:
+            op = row.operator(f"{copy_operator}", text="", icon="COPYDOWN")
+            op.data = json.dumps({"name": attribute.name, "value": value, "is_null": attribute.is_null})
+
+
 def import_attributes(ifc_class, props, data, callback=None):
     for attribute in IfcStore.get_schema().declaration_by_name(ifc_class).all_attributes():
         data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
@@ -18,7 +44,7 @@ def import_attributes(ifc_class, props, data, callback=None):
         new.is_null = data[attribute.name()] is None
         new.is_optional = attribute.optional()
         new.data_type = data_type if isinstance(data_type, str) else ""
-        is_handled_by_callback = callback(attribute.name(), new, data) if callback else False
+        is_handled_by_callback = callback(attribute.name(), new, data) if callback else None
         if is_handled_by_callback:
             pass  # Our job is done
         elif is_handled_by_callback is False:
@@ -56,267 +82,3 @@ def export_attributes(props, callback=None):
         elif attribute.data_type == "enum":
             attributes[attribute.name] = attribute.enum_value
     return attributes
-
-
-# TODO: migrate the below helper functions into the drawing module, since it is specific to that module
-
-
-# This function stolen from https://github.com/kevancress/MeasureIt_ARCH/blob/dcf607ce0896aa2284463c6b4ae9cd023fc54cbe/measureit_arch_baseclass.py
-# MeasureIt-ARCH is GPL-v3
-# In the future I will need to rewrite this to allow the user to have custom
-# settings for each annotation object, not read from Blender.
-def format_distance(value, isArea=False, hide_units=True):
-    s_code = "\u00b2"  # Superscript two THIS IS LEGACY (but being kept for when Area Measurements are re-implimented)
-
-    # Get Scene Unit Settings
-    scaleFactor = bpy.context.scene.unit_settings.scale_length
-    unit_system = bpy.context.scene.unit_settings.system
-    unit_length = bpy.context.scene.unit_settings.length_unit
-
-    toInches = 39.3700787401574887
-    inPerFoot = 11.999
-
-    if isArea:
-        toInches = 1550
-        inPerFoot = 143.999
-
-    value *= scaleFactor
-
-    # Imperial Formating
-    if unit_system == "IMPERIAL":
-        precision = bpy.context.scene.BIMProperties.imperial_precision
-        if precision == "NONE":
-            precision = 256
-        elif precision == "1":
-            precision = 1
-        elif "/" in precision:
-            precision = int(precision.split("/")[1])
-
-        base = int(precision)
-        decInches = value * toInches
-
-        # Seperate ft and inches
-        # Unless Inches are the specified Length Unit
-        if unit_length != "INCHES":
-            feet = math.floor(decInches / inPerFoot)
-            decInches -= feet * inPerFoot
-        else:
-            feet = 0
-
-        # Seperate Fractional Inches
-        inches = math.floor(decInches)
-        if inches != 0:
-            frac = round(base * (decInches - inches))
-        else:
-            frac = round(base * (decInches))
-
-        # Set proper numerator and denominator
-        if frac != base:
-            numcycles = int(math.log2(base))
-            for i in range(numcycles):
-                if frac % 2 == 0:
-                    frac = int(frac / 2)
-                    base = int(base / 2)
-                else:
-                    break
-        else:
-            frac = 0
-            inches += 1
-
-        # Check values and compose string
-        if inches == 12:
-            feet += 1
-            inches = 0
-
-        if not isArea:
-            tx_dist = ""
-            if feet:
-                tx_dist += str(feet) + "'"
-            if feet and inches:
-                tx_dist += " - "
-            if inches:
-                tx_dist += str(inches)
-            if inches and frac:
-                tx_dist += " "
-            if frac:
-                tx_dist += str(frac) + "/" + str(base)
-            if inches or frac:
-                tx_dist += '"'
-        else:
-            tx_dist = str("%1.3f" % (value * toInches / inPerFoot)) + " sq. ft."
-
-    # METRIC FORMATING
-    elif unit_system == "METRIC":
-        precision = bpy.context.scene.BIMProperties.metric_precision
-        if precision != 0:
-            value = precision * round(float(value) / precision)
-
-        # Meters
-        if unit_length == "METERS":
-            fmt = "%1.3f"
-            if hide_units is False:
-                fmt += " m"
-            tx_dist = fmt % value
-        # Centimeters
-        elif unit_length == "CENTIMETERS":
-            fmt = "%1.1f"
-            if hide_units is False:
-                fmt += " cm"
-            d_cm = value * (100)
-            tx_dist = fmt % d_cm
-        # Millimeters
-        elif unit_length == "MILLIMETERS":
-            fmt = "%1.0f"
-            if hide_units is False:
-                fmt += " mm"
-            d_mm = value * (1000)
-            tx_dist = fmt % d_mm
-
-        # Otherwise Use Adaptive Units
-        else:
-            if round(value, 2) >= 1.0:
-                fmt = "%1.3f"
-                if hide_units is False:
-                    fmt += " m"
-                tx_dist = fmt % value
-            else:
-                if round(value, 2) >= 0.01:
-                    fmt = "%1.1f"
-                    if hide_units is False:
-                        fmt += " cm"
-                    d_cm = value * (100)
-                    tx_dist = fmt % d_cm
-                else:
-                    fmt = "%1.0f"
-                    if hide_units is False:
-                        fmt += " mm"
-                    d_mm = value * (1000)
-                    tx_dist = fmt % d_mm
-        if isArea:
-            tx_dist += s_code
-    else:
-        tx_dist = fmt % value
-
-    return tx_dist
-
-
-def parse_diagram_scale(camera):
-    """Returns numeric value of scale"""
-    if camera.BIMCameraProperties.diagram_scale == "CUSTOM":
-        _, fraction = camera.BIMCameraProperties.custom_diagram_scale.split("|")
-    else:
-        _, fraction = camera.BIMCameraProperties.diagram_scale.split("|")
-    numerator, denominator = fraction.split("/")
-    return float(numerator) / float(denominator)
-
-
-def get_project_collection(scene):
-    """Get main project collection"""
-
-    colls = [c for c in scene.collection.children if c.name.startswith("IfcProject")]
-    if len(colls) != 1:
-        raise RuntimeError("project collection missing or not unique")
-    return colls[0]
-
-
-def get_active_drawing(scene):
-    """Get active drawing collection and camera"""
-    props = scene.DocProperties
-    if props.active_drawing_index is None or len(props.drawings) == 0:
-        return None, None
-    try:
-        drawing = props.drawings[props.active_drawing_index]
-        return scene.collection.children["Views"].children[f"IfcGroup/{drawing.name}"], drawing.camera
-    except (KeyError, IndexError):
-        raise RuntimeError("missing drawing collection")
-
-
-def ortho_view_frame(camera, margin=0.015):
-    """Calculates 2d bounding box of camera view area.
-
-    Similar to `bpy.types.Camera.view_frame`
-
-    :arg camera: camera of drawing
-    :type camera: bpy.types.Camera + BIMCameraProperties
-    :arg margin: margins, in scene units
-    :type margin: float
-    :return: (xmin, xmax, ymin, ymax, zmin, zmax) in local camera coordinates
-    """
-    aspect = camera.BIMCameraProperties.raster_y / camera.BIMCameraProperties.raster_x
-    size = camera.ortho_scale
-    hwidth = size * 0.5
-    hheight = size * 0.5 * aspect
-    scale = parse_diagram_scale(camera)
-    xmarg = margin * scale
-    ymarg = margin * scale * aspect
-    return (-hwidth + xmarg, hwidth - xmarg, -hheight + ymarg, hheight - ymarg, -camera.clip_start, -camera.clip_end)
-
-
-def almost_zero(v):
-    return abs(v) < 1e-5
-
-
-def clip_segment(bounds, segm):
-    """Clipping line segment to bounds
-
-    :arg bounds: (xmin, xmax, ymin, ymax)
-    :arg segm: 2 vertices of the segment
-    :return: 2 new vertices of segment or None if segment outside the bounding box
-    """
-    # Liang–Barsky algorithm
-
-    xmin, xmax, ymin, ymax, _, _ = bounds
-    p1, p2 = segm
-
-    def clip_side(p, q):
-        if almost_zero(p):  # ~= 0, parallel to the side
-            if q < 0:
-                return None  # outside
-            else:
-                return 0, 1  # inside
-
-        t = q / p  # the intersection point
-
-        if p < 0:  # entering
-            return t, 1
-        else:  # leaving
-            return 0, t
-
-    dlt = p2 - p1
-
-    tt = (
-        clip_side(-dlt.x, p1.x - xmin),  # left
-        clip_side(+dlt.x, xmax - p1.x),  # right
-        clip_side(-dlt.y, p1.y - ymin),  # bottom
-        clip_side(+dlt.y, ymax - p1.y),  # top
-    )
-
-    if None in tt:
-        return None
-
-    t1 = max(0, max(t[0] for t in tt))
-    t2 = min(1, min(t[1] for t in tt))
-
-    if t1 >= t2:
-        return None
-
-    p1c = p1 + dlt * t1
-    p2c = p1 + dlt * t2
-
-    return p1c, p2c
-
-
-def elevate_segment(bounds, segm):
-    """Elevate line xy-perpendicular segment vertically
-
-    :arg bounds: (xmin, xmax, ymin, ymax)
-    :arg segm: 2 vertices of the segment
-    :return: 2 new vertices of segment or None if segment outside the bounding box
-    """
-    _, _, ymin, ymax, zmin, _ = bounds
-    p1, p2 = segm
-    dlt = p2 - p1
-    if not (almost_zero(dlt.x) and almost_zero(dlt.y)):
-        return None
-    x = p1.x
-    return [Vector((x, ymin, zmin)), Vector((x, ymax, zmin))]

src/blenderbim/blenderbim/bim/ifc.py

@@ -1,4 +1,5 @@
 import bpy
+import uuid
 import ifcopenshell
 import blenderbim.bim.handler
 
@@ -14,6 +15,11 @@ class IfcStore:
     pset_template_file = None
     library_path = ""
     library_file = None
+    element_listeners = set()
+    current_transaction = ""
+    last_transaction = ""
+    history = []
+    future = []
 
     @staticmethod
     def purge():
@@ -47,6 +53,44 @@ class IfcStore:
             IfcStore.schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(IfcStore.file.schema)
         return IfcStore.schema
 
+    @staticmethod
+    def get_element(id_or_guid):
+        if isinstance(id_or_guid, int):
+            map_object = IfcStore.id_map
+        else:
+            map_object = IfcStore.guid_map
+        try:
+            obj = map_object[id_or_guid]
+            obj.type  # In case the object has been deleted, this triggers an exception
+        except:
+            return
+        return obj
+
+    @staticmethod
+    def add_element_listener(callback):
+        IfcStore.element_listeners.add(callback)
+
+    @staticmethod
+    def reload_linked_elements(should_reload_selected=False):
+        file = IfcStore.get_file()
+        if not file:
+            return
+        if should_reload_selected:
+            objects = bpy.context.selected_objects
+            if bpy.context.active_object:
+                objects += [bpy.context.active_object]
+        else:
+            objects = bpy.data.objects
+
+        for obj in objects:
+            if not obj.BIMObjectProperties.ifc_definition_id:
+                continue
+            element = file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+            data = {"id": element.id(), "obj": obj.name}
+            if hasattr(element, "GlobalId"):
+                data["guid"] = element.GlobalId
+            IfcStore.commit_link_element(data)
+
     @staticmethod
     def link_element(element, obj):
         IfcStore.id_map[element.id()] = obj
@@ -55,11 +99,128 @@ class IfcStore:
         obj.BIMObjectProperties.ifc_definition_id = element.id()
         blenderbim.bim.handler.subscribe_to(obj, "mode", blenderbim.bim.handler.mode_callback)
         blenderbim.bim.handler.subscribe_to(obj, "name", blenderbim.bim.handler.name_callback)
+        for listener in IfcStore.element_listeners:
+            listener(element, obj)
+
+        if IfcStore.history:
+            data = {"id": element.id(), "guid": getattr(element, "GlobalId", None), "obj": obj.name}
+            IfcStore.history[-1]["operations"].append(
+                {"rollback": IfcStore.rollback_link_element, "commit": IfcStore.commit_link_element, "data": data}
+            )
 
     @staticmethod
-    def unlink_element(element, obj=None):
-        del IfcStore.id_map[element.id()]
-        if hasattr(element, "GlobalId"):
-            del IfcStore.guid_map[element.GlobalId]
+    def rollback_link_element(data):
+        del IfcStore.id_map[data["id"]]
+        if data["guid"]:
+            del IfcStore.guid_map[data["guid"]]
+
+    @staticmethod
+    def commit_link_element(data):
+        obj = bpy.data.objects.get(data["obj"])
+        IfcStore.id_map[data["id"]] = obj
+        if data["guid"]:
+            IfcStore.guid_map[data["guid"]] = obj
+        blenderbim.bim.handler.subscribe_to(obj, "mode", blenderbim.bim.handler.mode_callback)
+        blenderbim.bim.handler.subscribe_to(obj, "name", blenderbim.bim.handler.name_callback)
+
+    @staticmethod
+    def unlink_element(element=None, obj=None):
+        if element is None:
+            try:
+                element = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+            except:
+                pass
+
+        try:
+            if element:
+                del IfcStore.id_map[element.id()]
+            else:
+                del IfcStore.id_map[obj.BIMObjectProperties.ifc_definition_id]
+        except:
+            pass
+
+        try:
+            if element and hasattr(element, "GlobalId"):
+                del IfcStore.guid_map[element.GlobalId]
+        except:
+            pass
+
         if obj:
             obj.BIMObjectProperties.ifc_definition_id = 0
+
+    @staticmethod
+    def execute_ifc_operator(operator, context):
+        is_top_level_operator = not bool(IfcStore.current_transaction)
+
+        if is_top_level_operator:
+            IfcStore.begin_transaction(operator)
+            IfcStore.get_file().begin_transaction()
+            # This empty transaction ensures that each operator has at least one transaction
+            IfcStore.add_transaction_operation(operator, rollback=lambda data: True, commit=lambda data: True)
+        else:
+            operator.transaction_key = IfcStore.current_transaction
+
+        result = getattr(operator, "_execute")(context)
+
+        if is_top_level_operator:
+            IfcStore.get_file().end_transaction()
+            IfcStore.add_transaction_operation(
+                operator, rollback=IfcStore.rollback_ifc_operator, commit=IfcStore.commit_ifc_operator
+            )
+            IfcStore.end_transaction(operator)
+
+        return result
+
+    @staticmethod
+    def rollback_ifc_operator(data):
+        IfcStore.get_file().undo()
+        blenderbim.bim.handler.purge_module_data()
+
+    @staticmethod
+    def commit_ifc_operator(data):
+        IfcStore.get_file().redo()
+        blenderbim.bim.handler.purge_module_data()
+
+    @staticmethod
+    def begin_transaction(operator):
+        IfcStore.current_transaction = str(uuid.uuid4())
+        operator.transaction_key = IfcStore.current_transaction
+
+    @staticmethod
+    def end_transaction(operator):
+        IfcStore.current_transaction = ""
+        operator.transaction_key = ""
+
+    @staticmethod
+    def add_transaction_operation(operator, rollback=None, commit=None):
+        key = getattr(operator, "transaction_key", None)
+        data = getattr(operator, "transaction_data", None)
+        bpy.context.scene.BIMProperties.last_transaction = key
+        IfcStore.last_transaction = key
+        rollback = rollback or getattr(operator, "rollback", lambda data: True)
+        commit = commit or getattr(operator, "commit", lambda data: True)
+        if IfcStore.history and IfcStore.history[-1]["key"] == key:
+            IfcStore.history[-1]["operations"].append({"rollback": rollback, "commit": commit, "data": data})
+        else:
+            IfcStore.history.append(
+                {"key": key, "operations": [{"rollback": rollback, "commit": commit, "data": data}]}
+            )
+        IfcStore.future = []
+
+    @staticmethod
+    def undo():
+        if not IfcStore.history:
+            return
+        event = IfcStore.history.pop()
+        for transaction in event["operations"][::-1]:
+            transaction["rollback"](transaction["data"])
+        IfcStore.future.append(event)
+
+    @staticmethod
+    def redo():
+        if not IfcStore.future:
+            return
+        event = IfcStore.future.pop()
+        for transaction in event["operations"]:
+            transaction["commit"](transaction["data"])
+        IfcStore.history.append(event)

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -18,11 +18,11 @@ import multiprocessing
 import zipfile
 import tempfile
 import numpy as np
+from blenderbim.bim.module.drawing.prop import getDiagramScales
 from pathlib import Path
 from itertools import cycle
 from datetime import datetime
 from blenderbim.bim.ifc import IfcStore
-from . import schema
 
 
 class FileCopy(threading.Thread):
@@ -39,14 +39,14 @@ class MaterialCreator:
     def __init__(self, ifc_import_settings, ifc_importer):
         self.mesh = None
         self.materials = {}
+        self.styles = {}
         self.parsed_meshes = set()
         self.ifc_import_settings = ifc_import_settings
         self.ifc_importer = ifc_importer
 
     def create(self, element, obj, mesh):
-        self.obj = obj
         self.mesh = mesh
-        self.parse_material(element)
+        self.obj = obj
         if (hasattr(element, "Representation") and not element.Representation) or (
             hasattr(element, "RepresentationMaps") and not element.RepresentationMaps
         ):
@@ -55,7 +55,7 @@ class MaterialCreator:
             return
         self.parsed_meshes.add(self.mesh.name)
         if self.parse_representations(element):
-            self.assign_material_slots_to_faces(obj)
+            self.assign_material_slots_to_faces()
 
     def parse_representations(self, element):
         has_parsed = False
@@ -80,51 +80,23 @@ class MaterialCreator:
     def parse_representation_item(self, item):
         if not item.StyledByItem:
             return
-
-        item_id = self.mesh.BIMMeshProperties.ifc_item_ids.add()
-        item_id.name = str(item.id())
-
-        styled_item = item.StyledByItem[0]  # Cardinality is S[0:1]
-        style_name = self.get_surface_style_name(styled_item)
-
-        if not style_name:
+        style_ids = [e.id() for e in self.ifc_importer.file.traverse(item.StyledByItem[0]) if e.is_a("IfcSurfaceStyle")]
+        if not style_ids:
             return
-
-        if self.mesh.materials.get(style_name):
-            item_id.slot_index = self.mesh.materials.find(style_name)
-            return True
-
-        style = bpy.data.materials.get(style_name)
-        if not style:
-            style = bpy.data.materials.new(style_name)
-        self.parse_styled_item(styled_item, style)
-
-        self.assign_style_to_mesh(style)
-        item_id.slot_index = len(self.mesh.materials) - 1
+        for style_id in style_ids:
+            material = self.styles[style_id]
+            if self.mesh.materials.find(material.name) == -1:
+                self.mesh.materials.append(material)
         return True
 
-    def assign_material_slots_to_faces(self, obj):
+    def assign_material_slots_to_faces(self):
         if "ios_materials" not in self.mesh or not self.mesh["ios_materials"]:
             return
-        if len(obj.material_slots) == 1:
+        if len(self.obj.material_slots) == 1:
             return
         material_to_slot = {}
         for i, material in enumerate(self.mesh["ios_materials"]):
-            if material == "NULLMAT":
-                continue
-            elif "surface-style-" in material:
-                material = material.split("-")[2]
-            if len(bytes(material, "utf-8")) > 63:  # Blender material names are up to 63 UTF-8 bytes
-                material = bytes(material, "utf-8")[0:63].decode("utf-8")
-
-            slot_index = obj.material_slots.find(material)
-            if slot_index == -1:
-                # If we can't find the material, it is possible that the
-                # material name is duplicated, and so a '.001' is added.
-                # The maximum characters for the material name is 59 in this
-                # scenario.
-                material = bytes(material, "utf-8")[0:59].decode("utf-8")
-                slot_index = [self.canonicalise_material_name(s.name) for s in obj.material_slots].index(material)
+            slot_index = self.obj.material_slots.find(self.styles[material].name)
             material_to_slot[i] = slot_index
 
         if len(self.mesh.polygons) == len(self.mesh["ios_material_ids"]):
@@ -133,130 +105,6 @@ class MaterialCreator:
             ]
             self.mesh.polygons.foreach_set("material_index", material_index)
 
-    def canonicalise_material_name(self, name):
-        return re.sub(r"\.[0-9]{3}$", "", name)
-
-    def parse_material(self, element):
-        for association in element.HasAssociations:
-            if association.is_a("IfcRelAssociatesMaterial"):
-                material_select = association.RelatingMaterial
-                if material_select.is_a("IfcMaterialDefinition"):
-                    self.create_definition(material_select)
-                elif material_select.is_a("IfcMaterialUsageDefinition"):
-                    self.create_usage_definition(material_select)
-                elif material_select.is_a("IfcMaterialList"):
-                    # Note that lists are deprecated
-                    self.create_material_list(material_select)
-                # To support IFC2X3 equivalent of IfcMaterialDefinition
-                elif material_select.is_a("IfcMaterial") or material_select.is_a("IfcMaterialLayerSet"):
-                    self.create_definition(material_select)
-                # To support IFC2X3 equivalent of IfcMaterialUsageDefinition
-                elif material_select.is_a("IfcMaterialLayerSetUsage"):
-                    self.create_usage_definition(material_select)
-                # IFC2X3 supports assigning a material layer directly. This is silly.
-                elif material_select.is_a("IfcMaterialLayer"):
-                    pass
-
-    def create_layer_set_usage(self, usage):
-        # TODO import rest of the layer set usage data
-        self.create_definition(usage.ForLayerSet)
-
-    def create_definition(self, material):
-        if material.is_a("IfcMaterial"):
-            self.create_single(material)
-        elif material.is_a("IfcMaterialConstituentSet"):
-            self.create_constituent_set(material)
-        elif material.is_a("IfcMaterialLayerSet"):
-            self.create_layer_set(material)
-        elif material.is_a("IfcMaterialProfileSet"):
-            self.create_profile_set(material)
-
-    def create_usage_definition(self, material):
-        if material.is_a("IfcMaterialLayerSetUsage"):
-            self.create_layer_set_usage(material)
-        elif material.is_a("IfcMaterialProfileSetUsage"):
-            pass  # TODO
-
-    def create_single(self, material):
-        if material.Name not in self.materials:
-            self.create_new_single(material)
-
-    def create_layer_set(self, layer_set):
-        for layer in layer_set.MaterialLayers:
-            if layer.Material:
-                if layer.Material.Name not in self.materials:
-                    self.create_new_single(layer.Material)
-
-    def create_constituent_set(self, constituent_set):
-        for constituent in constituent_set.MaterialConstituents:
-            if constituent.Material.Name not in self.materials:
-                self.create_new_single(constituent.Material)
-
-    def create_profile_set(self, profile_set):
-        for profile in profile_set.MaterialProfiles:
-            if profile.Material.Name not in self.materials:
-                self.create_new_single(profile.Material)
-
-    def create_material_list(self, material_list):
-        for material in material_list.Materials:
-            if material.Name not in self.materials:
-                self.create_new_single(material)
-
-    def create_new_single(self, material):
-        self.materials[material.Name] = obj = bpy.data.materials.new(material.Name)
-        obj.BIMObjectProperties.ifc_definition_id = int(material.id())
-        if not material.HasRepresentation or not material.HasRepresentation[0].Representations:
-            return
-        for representation in material.HasRepresentation[0].Representations:
-            if not representation.Items:
-                continue
-            for item in representation.Items:
-                if not item.is_a("IfcStyledItem"):
-                    continue
-                self.parse_styled_item(item, obj)
-
-    def get_surface_style_name(self, styled_item):
-        if styled_item.Name:
-            return styled_item.Name
-        styles = self.get_styled_item_styles(styled_item)
-        for style in styles:
-            if not style.is_a("IfcSurfaceStyle"):
-                continue
-            if style.Name:
-                return style.Name
-            return str(style.id())
-        return None  # We only support surface styles right now
-
-    def parse_styled_item(self, styled_item, material):
-        styles = self.get_styled_item_styles(styled_item)
-        for style in styles:
-            if not style.is_a("IfcSurfaceStyle"):
-                continue
-            material.BIMMaterialProperties.ifc_style_id = int(style.id())
-            for surface_style in style.Styles:
-                if surface_style.is_a("IfcSurfaceStyleShading"):
-                    alpha = 1.0
-                    # Transparency was added in IFC4
-                    if hasattr(surface_style, "Transparency") and surface_style.Transparency:
-                        alpha = 1 - surface_style.Transparency
-                    material.diffuse_color = (
-                        surface_style.SurfaceColour.Red,
-                        surface_style.SurfaceColour.Green,
-                        surface_style.SurfaceColour.Blue,
-                        alpha,
-                    )
-
-    # IfcPresentationStyleAssignment is deprecated as of IFC4
-    # However it is still widely used thanks to Revit :(
-    def get_styled_item_styles(self, styled_item):
-        styles = []
-        for style in styled_item.Styles:
-            if style.is_a("IfcPresentationStyleAssignment"):
-                styles.extend(self.get_styled_item_styles(style))
-            else:
-                styles.append(style)
-        return styles
-
     def resolve_mapped_representation_items(self, representation):
         items = []
         for item in representation.Items:
@@ -266,11 +114,6 @@ class MaterialCreator:
                 items.append(item)
         return items
 
-    def assign_style_to_mesh(self, material):
-        if not self.mesh:
-            return
-        self.mesh.materials.append(material)
-
 
 class IfcImporter:
     def __init__(self, ifc_import_settings):
@@ -336,6 +179,10 @@ class IfcImporter:
         self.profile_code("Create aggregate tree")
         self.create_openings_collection()
         self.profile_code("Create opening collection")
+        self.create_materials()
+        self.profile_code("Create materials")
+        self.create_styles()
+        self.profile_code("Create styles")
         self.process_element_filter()
         self.profile_code("Process element filter")
         self.parse_native_elements()
@@ -346,6 +193,8 @@ class IfcImporter:
         self.profile_code("Create native products")
         self.create_products()
         self.profile_code("Create products")
+        self.create_empty_products()
+        self.profile_code("Create empty products")
         self.create_type_products()
         self.profile_code("Create type products")
         self.create_annotation()
@@ -381,13 +230,10 @@ class IfcImporter:
 
     def is_point_far_away(self, point):
         # Arbitrary threshold based on experience
+        coords = point
         if hasattr(point, "Coordinates"):
-            return (
-                abs(point.Coordinates[0]) > 1000000
-                or abs(point.Coordinates[1]) > 1000000
-                or abs(point.Coordinates[2]) > 1000000
-            )
-        return abs(point[0]) > 1000000 or abs(point[1]) > 1000000 or abs(point[2]) > 1000000
+            coords = point.Coordinates
+        return abs(coords[0]) > 1000000 or abs(coords[1]) > 1000000 or abs(coords[2]) > 1000000
 
     def process_element_filter(self):
         if not self.ifc_import_settings.ifc_selector:
@@ -442,9 +288,9 @@ class IfcImporter:
 
     def is_native_swept_disk_solid(self, representations):
         for representation in representations:
-            if len(representation["raw"].Items) > 1 or not representation["raw"].Items[0].is_a("IfcSweptDiskSolid"):
-                return False
-        return True
+            if len(representation["raw"].Items) == 1 and representation["raw"].Items[0].is_a("IfcSweptDiskSolid"):
+                return True
+        return False
 
     def is_native_faceted_brep(self, representations):
         for representation in representations:
@@ -507,18 +353,18 @@ class IfcImporter:
         elements_checked = 0
         # If more than these points aren't far away, the file probably isn't absolutely positioned
         element_checking_threshold = 100
-        try:
-            point_lists = self.file.by_type("IfcCartesianPointList3D")
-        except:
+        if self.file.schema == "IFC2X3":
             # IFC2X3 does not have IfcCartesianPointList3D
             point_lists = []
+        else:
+            point_lists = self.file.by_type("IfcCartesianPointList3D")
         for point_list in point_lists:
             elements_checked += 1
             if elements_checked > element_checking_threshold:
                 return
             for i, point in enumerate(point_list.CoordList):
                 if len(point) == 3 and self.is_point_far_away(point):
-                    return point[0]
+                    return point
 
         for point in self.file.by_type("IfcCartesianPoint"):
             is_used_in_placement = False
@@ -532,7 +378,7 @@ class IfcImporter:
             if elements_checked > element_checking_threshold:
                 return
             if len(point.Coordinates) == 3 and self.is_point_far_away(point):
-                return point[0]
+                return point.Coordinates
 
     def apply_blender_offset_to_matrix(self, matrix):
         props = bpy.context.scene.BIMGeoreferenceProperties
@@ -702,15 +548,30 @@ class IfcImporter:
                 checkpoint = time.time()
             shape = iterator.get()
             if shape:
-                if shape.context != "Body" and shape.guid in IfcStore.guid_map:
+                product = self.file.by_id(shape.guid)
+                # Facetation is to accommodate broken Revit files
+                # See https://forums.buildingsmart.org/t/suggestions-on-how-to-improve-clarity-of-representation-context-usage-in-documentation/3663/6?u=moult
+                if shape.context not in ["Body", "Facetation"] and IfcStore.get_element(shape.guid):
                     # We only load a single context, and we prioritise the Body context. See #1290.
                     pass
+                elif product.is_a("IfcAnnotation") and product.ObjectType == "DRAWING":
+                    # We have already processed this during the create_annotation step
+                    pass
                 else:
-                    self.create_product(self.file.by_id(shape.guid), shape)
+                    self.create_product(product, shape)
             if not iterator.next():
                 break
         print("Done creating geometry")
 
+    def create_empty_products(self):
+        for element in self.file.by_type("IfcProduct"):
+            if element.id() in self.added_data:
+                continue
+            if element.is_a("IfcPort"):
+                continue
+            if not element.Representation:
+                self.create_product(element)
+
     def create_annotation(self):
         self.create_curve_products(self.file.by_type("IfcAnnotation"))
 
@@ -784,6 +645,8 @@ class IfcImporter:
 
         if mesh:
             pass
+        elif element.is_a("IfcAnnotation") and element.ObjectType == "DRAWING":
+            mesh = self.create_camera(element, shape)
         elif shape:
             mesh_name = self.get_mesh_name(shape.geometry)
             mesh = self.meshes.get(mesh_name)
@@ -823,8 +686,8 @@ class IfcImporter:
     def get_representation_item_material_name(self, item):
         if not item.StyledByItem:
             return
-        styled_item = item.StyledByItem[0]
-        return self.material_creator.get_surface_style_name(styled_item)
+        style_ids = [e.id() for e in self.ifc_importer.file.traverse(item.StyledByItem[0]) if e.is_a("IfcSurfaceStyle")]
+        return style_ids[0] if style_ids else None
 
     def create_native_faceted_brep(self, element, mesh_name):
         # TODO: georeferencing?
@@ -845,6 +708,7 @@ class IfcImporter:
 
         for representation in self.native_data[element.GlobalId]["representations"]:
             for item in representation["raw"].Items:
+                # TODO: if I reimplement native faceted breps, recheck this material implementation
                 materials.append(self.get_representation_item_material_name(item) or "NULLMAT")
                 mesh = item.get_info_2(recursive=True)  # See bug #841
                 total_item_polygons = 0
@@ -1131,6 +995,47 @@ class IfcImporter:
         self.opening_collection = bpy.data.collections.new("IfcOpeningElements")
         self.project["blender"].children.link(self.opening_collection)
 
+    def create_materials(self):
+        for material in self.file.by_type("IfcMaterial"):
+            blender_material = bpy.data.materials.new(material.Name)
+            blender_material.BIMObjectProperties.ifc_definition_id = material.id()
+            self.material_creator.materials[material.id()] = blender_material
+            blender_material.use_fake_user = True
+
+    def create_styles(self):
+        parsed_styles = set()
+
+        for material_definition_representation in self.file.by_type("IfcMaterialDefinitionRepresentation"):
+            material = material_definition_representation.RepresentedMaterial
+            for representation in material_definition_representation.Representations:
+                for style in [e for e in self.file.traverse(representation) if e.is_a("IfcSurfaceStyle")]:
+                    blender_material = self.material_creator.materials[material.id()]
+                    self.create_style(style, blender_material)
+                    parsed_styles.add(style.id())
+
+        for style in self.file.by_type("IfcSurfaceStyle"):
+            if style.id() in parsed_styles:
+                continue
+            name = style.Name or str(style.id())
+            blender_material = bpy.data.materials.new(name)
+            self.create_style(style, blender_material)
+
+    def create_style(self, style, blender_material):
+        blender_material.BIMMaterialProperties.ifc_style_id = style.id()
+        self.material_creator.styles[style.id()] = blender_material
+        for surface_style in style.Styles:
+            if surface_style.is_a("IfcSurfaceStyleShading"):
+                alpha = 1.0
+                # Transparency was added in IFC4
+                if hasattr(surface_style, "Transparency") and surface_style.Transparency:
+                    alpha = 1 - surface_style.Transparency
+                blender_material.diffuse_color = (
+                    surface_style.SurfaceColour.Red,
+                    surface_style.SurfaceColour.Green,
+                    surface_style.SurfaceColour.Blue,
+                    alpha,
+                )
+
     def get_name(self, element):
         return "{}/{}".format(element.is_a(), element.Name)
 
@@ -1147,8 +1052,8 @@ class IfcImporter:
         bpy.ops.object.delete({"selected_objects": objects_to_purge})
 
     def place_objects_in_spatial_tree(self):
-        for global_id, obj in self.added_data.items():
-            self.place_object_in_spatial_tree(self.file.by_guid(global_id), obj)
+        for ifc_definition_id, obj in self.added_data.items():
+            self.place_object_in_spatial_tree(self.file.by_id(ifc_definition_id), obj)
 
     def place_object_in_spatial_tree(self, element, obj):
         if element.is_a("IfcProject"):
@@ -1206,6 +1111,15 @@ class IfcImporter:
             self.structural_member_collection.objects.link(obj)
         elif element.is_a("IfcStructuralConnection"):
             self.structural_connection_collection.objects.link(obj)
+        elif element.is_a("IfcAnnotation") and element.ObjectType == "DRAWING":
+            view_collection = bpy.data.collections.get("Views")
+            if not view_collection:
+                view_collection = bpy.data.collections.new("Views")
+                bpy.context.scene.collection.children.link(view_collection)
+            group = [r for r in element.HasAssignments if r.is_a("IfcRelAssignsToGroup")][0].RelatingGroup
+            drawing_collection = bpy.data.collections.new("IfcGroup/" + group.Name)
+            view_collection.children.link(drawing_collection)
+            drawing_collection.objects.link(obj)
         else:
             self.ifc_import_settings.logger.warning("Warning: this object is outside the spatial hierarchy %s", element)
             bpy.context.scene.collection.objects.link(obj)
@@ -1294,6 +1208,46 @@ class IfcImporter:
         context_id = representation.ContextOfItems.id() if hasattr(representation, "ContextOfItems") else 0
         return "{}/{}".format(context_id, representation_id)
 
+    def create_camera(self, element, shape):
+        if hasattr(shape, "geometry"):
+            geometry = shape.geometry
+        else:
+            geometry = shape
+
+        v = geometry.verts
+        x = [v[i] for i in range(0, len(v), 3)]
+        y = [v[i + 1] for i in range(0, len(v), 3)]
+        z = [v[i + 2] for i in range(0, len(v), 3)]
+        width = max(x) - min(x)
+        height = max(y) - min(y)
+        depth = max(z) - min(z)
+
+        camera = bpy.data.cameras.new(self.get_mesh_name(geometry))
+        camera.type = "ORTHO"
+        camera.ortho_scale = width if width > height else height
+        camera.clip_end = depth
+
+        if width > height:
+            camera.BIMCameraProperties.raster_x = 1000
+            camera.BIMCameraProperties.raster_y = round(1000 * (height / width))
+        else:
+            camera.BIMCameraProperties.raster_x = round(1000 * (width / height))
+            camera.BIMCameraProperties.raster_y = 1000
+
+        psets = ifcopenshell.util.element.get_psets(element)
+        pset = psets.get("EPset_Drawing")
+        if pset:
+            if "TargetView" in pset:
+                camera.BIMCameraProperties.target_view = pset["TargetView"]
+            if "Scale" in pset:
+                valid_scales = [i[0] for i in getDiagramScales(None, None) if pset["Scale"] == i[0].split("|")[-1]]
+                if valid_scales:
+                    camera.BIMCameraProperties.diagram_scale = valid_scales[0]
+                else:
+                    camera.BIMCameraProperties.diagram_scale = "CUSTOM"
+                    camera.BIMCameraProperties.custom_diagram_scale = pset["Scale"]
+        return camera
+
     def create_mesh(self, element, shape):
         try:
             if hasattr(shape, "geometry"):
@@ -1349,14 +1303,7 @@ class IfcImporter:
                 edges = [[e[i], e[i + 1]] for i in range(0, len(e), 2)]
                 mesh.from_pydata(vertices, edges, [])
 
-            ios_materials = []
-            for mat in geometry.materials:
-                # See bug #866
-                if mat.original_name():
-                    ios_materials.append(mat.original_name())
-                else:
-                    ios_materials.append(mat.name)
-            mesh["ios_materials"] = ios_materials
+            mesh["ios_materials"] = [int(m.name.split("-")[2]) for m in geometry.materials]
             mesh["ios_material_ids"] = geometry.material_ids
             return mesh
         except:
@@ -1408,7 +1355,7 @@ class IfcImporter:
                 break
 
     def link_element(self, element, obj):
-        self.added_data[element.GlobalId] = obj
+        self.added_data[element.id()] = obj
         IfcStore.link_element(element, obj)
 
 

src/blenderbim/blenderbim/bim/module/aggregate/operator.py

@@ -7,10 +7,14 @@ from ifcopenshell.api.aggregate.data import Data
 class AssignObject(bpy.types.Operator):
     bl_idname = "bim.assign_object"
     bl_label = "Assign Object"
+    bl_options = {"REGISTER", "UNDO"}
     relating_object: bpy.props.StringProperty()
     related_object: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         related_objects = (
             [bpy.data.objects.get(self.related_object)] if self.related_object else bpy.context.selected_objects
@@ -45,7 +49,8 @@ class AssignObject(bpy.types.Operator):
                     self.remove_collection(collection, spatial_collection)
             else:
                 for collection in related_object.users_collection:
-                    collection.objects.unlink(related_object)
+                    if collection.name.startswith("Ifc"):
+                        collection.objects.unlink(related_object)
                 relating_collection.objects.link(related_object)
         return {"FINISHED"}
 
@@ -59,6 +64,7 @@ class AssignObject(bpy.types.Operator):
 class EnableEditingAggregate(bpy.types.Operator):
     bl_idname = "bim.enable_editing_aggregate"
     bl_label = "Enable Editing Aggregate"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         bpy.context.active_object.BIMObjectProperties.relating_object = None
@@ -70,6 +76,7 @@ class DisableEditingAggregate(bpy.types.Operator):
     bl_idname = "bim.disable_editing_aggregate"
     bl_label = "Disable Editing Aggregate"
     obj: bpy.props.StringProperty()
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
@@ -80,9 +87,13 @@ class DisableEditingAggregate(bpy.types.Operator):
 class AddAggregate(bpy.types.Operator):
     bl_idname = "bim.add_aggregate"
     bl_label = "Add Aggregate"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         aggregate_collection = bpy.data.collections.new("IfcElementAssembly/Assembly")
         bpy.context.scene.collection.children.link(aggregate_collection)

src/blenderbim/blenderbim/bim/module/aggregate/ui.py

@@ -16,6 +16,8 @@ class BIM_PT_aggregate(Panel):
         props = context.active_object.BIMObjectProperties
         if not props.ifc_definition_id:
             return False
+        if not IfcStore.get_element(props.ifc_definition_id):
+            return False
         if not IfcStore.get_file().by_id(props.ifc_definition_id).is_a("IfcObjectDefinition"):
             return False
         if props.ifc_definition_id not in Data.products:

src/blenderbim/blenderbim/bim/module/attribute/operator.py

@@ -9,6 +9,7 @@ from ifcopenshell.api.attribute.data import Data
 class EnableEditingAttributes(bpy.types.Operator):
     bl_idname = "bim.enable_editing_attributes"
     bl_label = "Enable Editing Attributes"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     obj_type: bpy.props.StringProperty()
 
@@ -24,7 +25,7 @@ class EnableEditingAttributes(bpy.types.Operator):
             props.attributes.remove(0)
         for attribute in Data.products[oprops.ifc_definition_id]:
             new = props.attributes.add()
-            if attribute["type"] == "entity":
+            if attribute["type"] == "entity" or (attribute["type"] == "list" and attribute["list_type"] == "entity"):
                 continue
             new.name = attribute["name"]
             new.is_null = attribute["is_null"]
@@ -45,6 +46,7 @@ class EnableEditingAttributes(bpy.types.Operator):
 class DisableEditingAttributes(bpy.types.Operator):
     bl_idname = "bim.disable_editing_attributes"
     bl_label = "Disable Editing Attributes"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     obj_type: bpy.props.StringProperty()
 
@@ -61,10 +63,14 @@ class DisableEditingAttributes(bpy.types.Operator):
 class EditAttributes(bpy.types.Operator):
     bl_idname = "bim.edit_attributes"
     bl_label = "Edit Attributes"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     obj_type: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         if self.obj_type == "Object":
             obj = bpy.data.objects.get(self.obj)
@@ -112,6 +118,7 @@ class EditAttributes(bpy.types.Operator):
 class GenerateGlobalId(bpy.types.Operator):
     bl_idname = "bim.generate_global_id"
     bl_label = "Regenerate GlobalId"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         index = bpy.context.active_object.BIMAttributeProperties.attributes.find("GlobalId")

src/blenderbim/blenderbim/bim/module/attribute/prop.py

@@ -1,5 +1,4 @@
 import bpy
-import blenderbim.bim.schema # refactor
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty, Attribute
 from bpy.types import PropertyGroup

src/blenderbim/blenderbim/bim/module/attribute/ui.py

@@ -15,7 +15,7 @@ def draw_ui(context, layout, obj_type):
         op = row.operator("bim.edit_attributes", icon="CHECKMARK", text="Save Attributes")
         op.obj_type = obj_type
         op.obj = obj.name
-        op = row.operator("bim.disable_editing_attributes", icon="X", text="")
+        op = row.operator("bim.disable_editing_attributes", icon="CANCEL", text="")
         op.obj_type = obj_type
         op.obj = obj.name
 
@@ -78,6 +78,8 @@ class BIM_PT_object_attributes(Panel):
 
     @classmethod
     def poll(cls, context):
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
         return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
 
     def draw(self, context):

src/blenderbim/blenderbim/bim/module/bcf/bcfstore.py

@@ -1,5 +1,5 @@
 import bcf
-import bcf.bcfxml
+import bcf.v2.bcfxml
 
 class BcfStore:
     bcfxml = None
@@ -7,5 +7,5 @@ class BcfStore:
     @staticmethod
     def get_bcfxml():
         if not BcfStore.bcfxml:
-            BcfStore.bcfxml = bcf.bcfxml.BcfXml()
+            BcfStore.bcfxml = bcf.v2.bcfxml.BcfXml()
         return BcfStore.bcfxml

src/blenderbim/blenderbim/bim/module/bcf/operator.py

@@ -1,6 +1,8 @@
 import os
 import bpy
 import bcf
+import bcf.bcfxml
+import bcf.v2.data
 from . import bcfstore
 from blenderbim.bim.ifc import IfcStore
 from math import radians, degrees, atan, tan, cos, sin
@@ -26,9 +28,10 @@ class LoadBcfProject(bpy.types.Operator):
 
     def execute(self, context):
         bpy.context.scene.BCFProperties.is_loaded = False
-        bcfxml = bcfstore.BcfStore.get_bcfxml()
         if self.filepath:
-            bcfxml.get_project(self.filepath)
+            bcfstore.BcfStore.bcfxml = bcf.bcfxml.load(self.filepath)
+        bcfxml = bcfstore.BcfStore.get_bcfxml()
+        bcfxml.get_project()
         bpy.context.scene.BCFProperties.name = bcfxml.project.name
         bpy.ops.bim.load_bcf_topics()
         bpy.context.scene.BCFProperties.is_loaded = True
@@ -250,7 +253,7 @@ class AddBcfBimSnippet(bpy.types.Operator):
         props = bpy.context.scene.BCFProperties
         blender_topic = props.topics[props.active_topic_index]
         topic = bcfxml.topics[blender_topic.name]
-        bim_snippet = bcf.data.BimSnippet()
+        bim_snippet = bcf.v2.data.BimSnippet()
         bim_snippet.reference = blender_topic.bim_snippet_reference
         bim_snippet.reference_schema = blender_topic.bim_snippet_schema
         bim_snippet.snippet_type = blender_topic.bim_snippet_type
@@ -270,7 +273,7 @@ class AddBcfRelatedTopic(bpy.types.Operator):
         related_topic = None
         for topic in bcfxml.topics.values():
             if topic.title == blender_topic.related_topic:
-                related_topic = bcf.data.RelatedTopic()
+                related_topic = bcf.v2.data.RelatedTopic()
                 related_topic.guid = topic.guid
                 break
         if not related_topic:
@@ -291,7 +294,7 @@ class AddBcfHeaderFile(bpy.types.Operator):
         props = bpy.context.scene.BCFProperties
         blender_topic = props.topics[props.active_topic_index]
         topic = bcfxml.topics[blender_topic.name]
-        header_file = bcf.data.HeaderFile()
+        header_file = bcf.v2.data.HeaderFile()
         header_file.reference = blender_topic.file_reference
         if not os.path.exists(header_file.reference):
             header_file.filename = header_file.reference
@@ -327,14 +330,14 @@ class AddBcfViewpoint(bpy.types.Operator):
         props = bpy.context.scene.BCFProperties
         blender_topic = props.topics[props.active_topic_index]
         topic = bcfxml.topics[blender_topic.name]
-        viewpoint = bcf.data.Viewpoint()
+        viewpoint = bcf.v2.data.Viewpoint()
 
         if bpy.context.scene.camera.data.type == "ORTHO":
-            camera = bcf.data.OrthogonalCamera()
+            camera = bcf.v2.data.OrthogonalCamera()
             camera.view_to_world_scale = bpy.context.scene.camera.data.ortho_scale
             viewpoint.orthogonal_camera = camera
         elif bpy.context.scene.camera.data.type == "PERSP":
-            camera = bcf.data.PerspectiveCamera()
+            camera = bcf.v2.data.PerspectiveCamera()
             camera.field_of_view = degrees(bpy.context.scene.camera.data.angle)
             viewpoint.perspective_camera = camera
         camera.camera_view_point.x = bpy.context.scene.camera.location.x
@@ -422,7 +425,7 @@ class AddBcfDocumentReference(bpy.types.Operator):
         topic = bcfxml.topics[blender_topic.name]
         if not blender_topic.document_reference:
             return {"FINISHED"}
-        document_reference = bcf.data.DocumentReference()
+        document_reference = bcf.v2.data.DocumentReference()
         document_reference.referenced_document = blender_topic.document_reference
         document_reference.description = blender_topic.document_reference_description or None
         bcfxml.add_document_reference(topic, document_reference)
@@ -609,10 +612,10 @@ class AddBcfComment(bpy.types.Operator):
         topic = bcfxml.topics[blender_topic.name]
         if not blender_topic.comment:
             return {"FINISHED"}
-        comment = bcf.data.Comment()
+        comment = bcf.v2.data.Comment()
         comment.comment = blender_topic.comment
         if blender_topic.has_related_viewpoint and blender_topic.viewpoints:
-            comment.viewpoint = bcf.data.Viewpoint()
+            comment.viewpoint = bcf.v2.data.Viewpoint()
             comment.viewpoint.guid = blender_topic.viewpoints
         bcfxml.add_comment(topic, comment)
         bpy.ops.bim.load_bcf_comments(topic_guid = topic.guid)

src/blenderbim/blenderbim/bim/module/boundary/__init__.py

@@ -0,0 +1,14 @@
+import bpy
+from . import ui
+
+classes = (
+    ui.BIM_PT_boundary,
+)
+
+
+def register():
+    pass
+
+
+def unregister():
+    pass

src/blenderbim/blenderbim/bim/module/boundary/ui.py

@@ -0,0 +1,36 @@
+import bpy
+import blenderbim.bim.helper
+from bpy.types import Panel, UIList
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.boundary.data import Data
+
+
+class BIM_PT_boundary(Panel):
+    bl_label = "IFC Space Boundaries"
+    bl_idname = "BIM_PT_boundary"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+
+    @classmethod
+    def poll(cls, context):
+        if not context.active_object:
+            return False
+        props = context.active_object.BIMObjectProperties
+        if not props.ifc_definition_id:
+            return False
+        if not IfcStore.get_element(props.ifc_definition_id):
+            return False
+        if IfcStore.get_file().by_id(props.ifc_definition_id).is_a() not in ["IfcSpace", "IfcExternalSpatialElement"]:
+            return False
+        return True
+
+    def draw(self, context):
+        self.oprops = context.active_object.BIMObjectProperties
+        if not Data.is_loaded:
+            Data.load(IfcStore.get_file())
+        for boundary_id in Data.spaces.get(self.oprops.ifc_definition_id, []):
+            boundary = Data.boundaries[boundary_id]
+            row = self.layout.row()
+            row.label(text=f"{boundary_id}", icon="GHOST_ENABLED")

src/blenderbim/blenderbim/bim/module/clash/ui.py

@@ -93,6 +93,7 @@ class BIM_PT_ifcclash(Panel):
 class BIM_PT_clash_manager(Panel):
     bl_idname = "BIM_PT_clash_manager"
     bl_label = "Clash Manager"
+    bl_options = {"DEFAULT_CLOSED"}
     bl_space_type = "VIEW_3D"
     bl_region_type = "UI"
     bl_category = "BlenderBIM"

src/blenderbim/blenderbim/bim/module/classification/operator.py

@@ -26,8 +26,12 @@ class LoadClassificationLibrary(bpy.types.Operator):
 class AddClassification(bpy.types.Operator):
     bl_idname = "bim.add_classification"
     bl_label = "Add Classification"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMClassificationProperties
         ifcopenshell.api.run(
             "classification.add_classification",
@@ -41,6 +45,7 @@ class AddClassification(bpy.types.Operator):
 class EnableEditingClassification(bpy.types.Operator):
     bl_idname = "bim.enable_editing_classification"
     bl_label = "Enable Editing Classification"
+    bl_options = {"REGISTER", "UNDO"}
     classification: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -64,6 +69,7 @@ class EnableEditingClassification(bpy.types.Operator):
 class DisableEditingClassification(bpy.types.Operator):
     bl_idname = "bim.disable_editing_classification"
     bl_label = "Disable Editing Classification"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMClassificationProperties.active_classification_id = 0
@@ -73,9 +79,13 @@ class DisableEditingClassification(bpy.types.Operator):
 class RemoveClassification(bpy.types.Operator):
     bl_idname = "bim.remove_classification"
     bl_label = "Remove Classification"
+    bl_options = {"REGISTER", "UNDO"}
     classification: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "classification.remove_classification",
@@ -89,8 +99,12 @@ class RemoveClassification(bpy.types.Operator):
 class EditClassification(bpy.types.Operator):
     bl_idname = "bim.edit_classification"
     bl_label = "Edit Classification"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMClassificationProperties
         attributes = {}
         for attribute in props.classification_attributes:
@@ -114,6 +128,7 @@ class EditClassification(bpy.types.Operator):
 class EnableEditingClassificationReference(bpy.types.Operator):
     bl_idname = "bim.enable_editing_classification_reference"
     bl_label = "Enable Editing Classification Reference"
+    bl_options = {"REGISTER", "UNDO"}
     reference: bpy.props.IntProperty()
     obj: bpy.props.StringProperty()
 
@@ -138,6 +153,7 @@ class EnableEditingClassificationReference(bpy.types.Operator):
 class DisableEditingClassificationReference(bpy.types.Operator):
     bl_idname = "bim.disable_editing_classification_reference"
     bl_label = "Disable Editing Classification Reference"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -149,10 +165,14 @@ class DisableEditingClassificationReference(bpy.types.Operator):
 class RemoveClassificationReference(bpy.types.Operator):
     bl_idname = "bim.remove_classification_reference"
     bl_label = "Remove Classification Reference"
+    bl_options = {"REGISTER", "UNDO"}
     reference: bpy.props.IntProperty()
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -171,9 +191,13 @@ class RemoveClassificationReference(bpy.types.Operator):
 class EditClassificationReference(bpy.types.Operator):
     bl_idname = "bim.edit_classification_reference"
     bl_label = "Edit Classification Reference"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         props = obj.BIMClassificationReferenceProperties
         attributes = {}
@@ -196,10 +220,14 @@ class EditClassificationReference(bpy.types.Operator):
 class AddClassificationReference(bpy.types.Operator):
     bl_idname = "bim.add_classification_reference"
     bl_label = "Add Classification Reference"
+    bl_options = {"REGISTER", "UNDO"}
     reference: bpy.props.IntProperty()
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         self.file = IfcStore.get_file()
 
@@ -229,6 +257,7 @@ class AddClassificationReference(bpy.types.Operator):
 class ChangeClassificationLevel(bpy.types.Operator):
     bl_idname = "bim.change_classification_level"
     bl_label = "Change Classification Level"
+    bl_options = {"REGISTER", "UNDO"}
     parent_id: bpy.props.IntProperty()
 
     def execute(self, context):

src/blenderbim/blenderbim/bim/module/classification/ui.py

@@ -70,6 +70,8 @@ class BIM_PT_classification_references(Panel):
 
     @classmethod
     def poll(cls, context):
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
         return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
 
     def draw(self, context):

src/blenderbim/blenderbim/bim/module/constraint/operator.py

@@ -9,6 +9,7 @@ from ifcopenshell.api.constraint.data import Data
 class LoadObjectives(bpy.types.Operator):
     bl_idname = "bim.load_objectives"
     bl_label = "Load Objectives"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         props = context.scene.BIMConstraintProperties
@@ -26,6 +27,7 @@ class LoadObjectives(bpy.types.Operator):
 class DisableConstraintEditingUI(bpy.types.Operator):
     bl_idname = "bim.disable_constraint_editing_ui"
     bl_label = "Disable Constraint Editing UI"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMConstraintProperties.is_editing = ""
@@ -36,6 +38,7 @@ class DisableConstraintEditingUI(bpy.types.Operator):
 class EnableEditingConstraint(bpy.types.Operator):
     bl_idname = "bim.enable_editing_constraint"
     bl_label = "Enable Editing Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     constraint: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -48,7 +51,7 @@ class EnableEditingConstraint(bpy.types.Operator):
 
         for attribute in IfcStore.get_schema().declaration_by_name(props.is_editing).all_attributes():
             data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
+            if data_type == "entity" or (isinstance(data_type, tuple) and "entity" in ".".join(data_type)):
                 continue
             new = props.constraint_attributes.add()
             new.name = attribute.name()
@@ -68,6 +71,7 @@ class EnableEditingConstraint(bpy.types.Operator):
 class DisableEditingConstraint(bpy.types.Operator):
     bl_idname = "bim.disable_editing_constraint"
     bl_label = "Disable Editing Constraint"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMConstraintProperties.active_constraint_id = 0
@@ -77,8 +81,12 @@ class DisableEditingConstraint(bpy.types.Operator):
 class AddObjective(bpy.types.Operator):
     bl_idname = "bim.add_objective"
     bl_label = "Add Objective"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         result = ifcopenshell.api.run("constraint.add_objective", IfcStore.get_file())
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_objectives()
@@ -89,8 +97,12 @@ class AddObjective(bpy.types.Operator):
 class EditObjective(bpy.types.Operator):
     bl_idname = "bim.edit_objective"
     bl_label = "Edit Objective"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMConstraintProperties
         attributes = {}
         for attribute in props.constraint_attributes:
@@ -114,9 +126,13 @@ class EditObjective(bpy.types.Operator):
 class RemoveConstraint(bpy.types.Operator):
     bl_idname = "bim.remove_constraint"
     bl_label = "Remove Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     constraint: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMConstraintProperties
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -131,6 +147,7 @@ class RemoveConstraint(bpy.types.Operator):
 class EnableAssigningConstraint(bpy.types.Operator):
     bl_idname = "bim.enable_assigning_constraint"
     bl_label = "Enable Assigning Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -145,6 +162,7 @@ class EnableAssigningConstraint(bpy.types.Operator):
 class DisableAssigningConstraint(bpy.types.Operator):
     bl_idname = "bim.disable_assigning_constraint"
     bl_label = "Disable Assigning Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -157,10 +175,14 @@ class DisableAssigningConstraint(bpy.types.Operator):
 class AssignConstraint(bpy.types.Operator):
     bl_idname = "bim.assign_constraint"
     bl_label = "Assign Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     constraint: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -178,10 +200,14 @@ class AssignConstraint(bpy.types.Operator):
 class UnassignConstraint(bpy.types.Operator):
     bl_idname = "bim.unassign_constraint"
     bl_label = "Unassign Constraint"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     constraint: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(

src/blenderbim/blenderbim/bim/module/constraint/ui.py

@@ -64,6 +64,8 @@ class BIM_PT_object_constraints(Panel):
 
     @classmethod
     def poll(cls, context):
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
         return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
 
     def draw(self, context):

src/blenderbim/blenderbim/bim/module/context/operator.py

@@ -7,11 +7,15 @@ from ifcopenshell.api.context.data import Data
 class AddSubcontext(bpy.types.Operator):
     bl_idname = "bim.add_subcontext"
     bl_label = "Add Subcontext"
+    bl_options = {"REGISTER", "UNDO"}
     context: bpy.props.StringProperty()
     subcontext: bpy.props.StringProperty()
     target_view: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "context.add_context",
@@ -29,9 +33,13 @@ class AddSubcontext(bpy.types.Operator):
 class RemoveSubcontext(bpy.types.Operator):
     bl_idname = "bim.remove_subcontext"
     bl_label = "Remove Context"
+    bl_options = {"REGISTER", "UNDO"}
     ifc_definition_id: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "context.remove_context", self.file, **{"context": self.file.by_id(self.ifc_definition_id)}

src/blenderbim/blenderbim/bim/module/cost/__init__.py

@@ -0,0 +1,48 @@
+import bpy
+from . import ui, prop, operator
+
+classes = (
+    operator.AddCostSchedule,
+    operator.RemoveCostSchedule,
+    operator.EditCostSchedule,
+    operator.EditCostItem,
+    operator.EditCostItemQuantity,
+    operator.EditCostValue,
+    operator.EnableEditingCostSchedule,
+    operator.EnableEditingCostItems,
+    operator.EnableEditingCostItem,
+    operator.EnableEditingCostItemQuantities,
+    operator.EnableEditingCostItemQuantity,
+    operator.EnableEditingCostItemValues,
+    operator.EnableEditingCostItemValue,
+    operator.DisableEditingCostItem,
+    operator.DisableEditingCostSchedule,
+    operator.DisableEditingCostItemQuantity,
+    operator.DisableEditingCostItemValue,
+    operator.AddCostItem,
+    operator.AddSummaryCostItem,
+    operator.ExpandCostItem,
+    operator.ContractCostItem,
+    operator.RemoveCostItem,
+    operator.AssignCostItemProduct,
+    operator.UnassignCostItemProduct,
+    operator.AddCostItemQuantity,
+    operator.RemoveCostItemQuantity,
+    operator.AddCostValue,
+    operator.RemoveCostItemValue,
+    operator.CopyCostItemValues,
+    operator.SelectCostItemProducts,
+    operator.SelectCostScheduleProducts,
+    prop.CostItem,
+    prop.BIMCostProperties,
+    ui.BIM_PT_cost_schedules,
+    ui.BIM_UL_cost_items,
+)
+
+
+def register():
+    bpy.types.Scene.BIMCostProperties = bpy.props.PointerProperty(type=prop.BIMCostProperties)
+
+
+def unregister():
+    del bpy.types.Scene.BIMCostProperties

src/blenderbim/blenderbim/bim/module/cost/operator.py

@@ -0,0 +1,573 @@
+import os
+import bpy
+import json
+import ifcopenshell.api
+import blenderbim.bim.helper
+from blenderbim.bim.module.cost.prop import purge
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.cost.data import Data
+
+
+class AddCostSchedule(bpy.types.Operator):
+    bl_idname = "bim.add_cost_schedule"
+    bl_label = "Add Cost Schedule"
+
+    def execute(self, context):
+        ifcopenshell.api.run("cost.add_cost_schedule", IfcStore.get_file())
+        Data.load(IfcStore.get_file())
+        return {"FINISHED"}
+
+
+class EditCostSchedule(bpy.types.Operator):
+    bl_idname = "bim.edit_cost_schedule"
+    bl_label = "Edit Cost Schedule"
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        attributes = blenderbim.bim.helper.export_attributes(props.cost_schedule_attributes)
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.edit_cost_schedule",
+            self.file,
+            **{"cost_schedule": self.file.by_id(props.active_cost_schedule_id), "attributes": attributes},
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.disable_editing_cost_schedule()
+        return {"FINISHED"}
+
+
+class RemoveCostSchedule(bpy.types.Operator):
+    bl_idname = "bim.remove_cost_schedule"
+    bl_label = "Remove Cost Schedule"
+    cost_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        ifcopenshell.api.run(
+            "cost.remove_cost_schedule",
+            IfcStore.get_file(),
+            cost_schedule=IfcStore.get_file().by_id(self.cost_schedule),
+        )
+        Data.load(IfcStore.get_file())
+        return {"FINISHED"}
+
+
+class EnableEditingCostSchedule(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_schedule"
+    bl_label = "Enable Editing Cost Schedule"
+    cost_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.props = context.scene.BIMCostProperties
+        self.props.active_cost_schedule_id = self.cost_schedule
+        while len(self.props.cost_schedule_attributes) > 0:
+            self.props.cost_schedule_attributes.remove(0)
+        self.enable_editing_cost_schedule()
+        self.props.is_editing = "COST_SCHEDULE"
+        return {"FINISHED"}
+
+    def enable_editing_cost_schedule(self):
+        data = Data.cost_schedules[self.cost_schedule]
+        blenderbim.bim.helper.import_attributes(
+            "IfcCostSchedule", self.props.cost_schedule_attributes, data, self.import_attributes
+        )
+
+    def import_attributes(self, name, prop, data):
+        if name in ["SubmittedOn", "UpdateDate"]:
+            prop.string_value = "" if prop.is_null else data[name].isoformat()
+            return True
+
+
+class EnableEditingCostItems(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_items"
+    bl_label = "Enable Editing Cost Items"
+    cost_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        if context.preferences.addons["blenderbim"].preferences.should_play_chaching_sound:
+            # lol
+            # TODO: make pitch higher as costs rise
+            try:
+                import aud
+
+                device = aud.Device()
+                # chaching.mp3 is by Lucish_ CC-BY-3.0 https://freesound.org/people/Lucish_/sounds/554841/
+                sound = aud.Sound(os.path.join(context.scene.BIMProperties.data_dir, "chaching.mp3"))
+                handle = device.play(sound)
+                sound_buffered = aud.Sound.buffer(sound)
+                handle_buffered = device.play(sound_buffered)
+                handle.stop()
+                handle_buffered.stop()
+            except:
+                pass  # ah well
+        self.props = context.scene.BIMCostProperties
+        self.props.active_cost_schedule_id = self.cost_schedule
+        while len(self.props.cost_items) > 0:
+            self.props.cost_items.remove(0)
+
+        self.contracted_cost_items = json.loads(self.props.contracted_cost_items)
+        for related_object_id in Data.cost_schedules[self.cost_schedule]["Controls"]:
+            self.create_new_cost_item_li(related_object_id, 0)
+        self.props.is_editing = "COST_ITEMS"
+        return {"FINISHED"}
+
+    def create_new_cost_item_li(self, related_object_id, level_index):
+        cost_item = Data.cost_items[related_object_id]
+        new = self.props.cost_items.add()
+        new.ifc_definition_id = related_object_id
+        new.name = cost_item["Name"] or "Unnamed"
+        new.is_expanded = related_object_id not in self.contracted_cost_items
+        new.level_index = level_index
+        if cost_item["IsNestedBy"]:
+            new.has_children = True
+            if new.is_expanded:
+                for related_object_id in cost_item["IsNestedBy"]:
+                    self.create_new_cost_item_li(related_object_id, level_index + 1)
+
+        return {"FINISHED"}
+
+
+class DisableEditingCostSchedule(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_cost_schedule"
+    bl_label = "Disable Editing Cost Schedule"
+
+    def execute(self, context):
+        context.scene.BIMCostProperties.active_cost_schedule_id = 0
+        return {"FINISHED"}
+
+
+class AddSummaryCostItem(bpy.types.Operator):
+    bl_idname = "bim.add_summary_cost_item"
+    bl_label = "Add Cost Item"
+    cost_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run("cost.add_cost_item", self.file, **{"cost_schedule": self.file.by_id(self.cost_schedule)})
+        Data.load(self.file)
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=self.cost_schedule)
+        return {"FINISHED"}
+
+
+class AddCostItem(bpy.types.Operator):
+    bl_idname = "bim.add_cost_item"
+    bl_label = "Add Cost Item"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run("cost.add_cost_item", self.file, **{"cost_item": self.file.by_id(self.cost_item)})
+        Data.load(self.file)
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=props.active_cost_schedule_id)
+        return {"FINISHED"}
+
+
+class ExpandCostItem(bpy.types.Operator):
+    bl_idname = "bim.expand_cost_item"
+    bl_label = "Expand Cost Item"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        self.file = IfcStore.get_file()
+        contracted_cost_items = json.loads(props.contracted_cost_items)
+        contracted_cost_items.remove(self.cost_item)
+        props.contracted_cost_items = json.dumps(contracted_cost_items)
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=props.active_cost_schedule_id)
+        return {"FINISHED"}
+
+
+class ContractCostItem(bpy.types.Operator):
+    bl_idname = "bim.contract_cost_item"
+    bl_label = "Contract Cost Item"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        self.file = IfcStore.get_file()
+        contracted_cost_items = json.loads(props.contracted_cost_items)
+        contracted_cost_items.append(self.cost_item)
+        props.contracted_cost_items = json.dumps(contracted_cost_items)
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=props.active_cost_schedule_id)
+        return {"FINISHED"}
+
+
+class RemoveCostItem(bpy.types.Operator):
+    bl_idname = "bim.remove_cost_item"
+    bl_label = "Remove Cost item"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.remove_cost_item",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+        )
+        contracted_cost_items = json.loads(props.contracted_cost_items)
+        if props.active_cost_item_index in contracted_cost_items:
+            contracted_cost_items.remove(props.active_cost_item_index)
+        props.contracted_cost_items = json.dumps(contracted_cost_items)
+        Data.load(self.file)
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=props.active_cost_schedule_id)
+        return {"FINISHED"}
+
+
+class EnableEditingCostItem(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_item"
+    bl_label = "Enable Editing Cost Item"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        while len(props.cost_item_attributes) > 0:
+            props.cost_item_attributes.remove(0)
+
+        data = Data.cost_items[self.cost_item]
+        blenderbim.bim.helper.import_attributes("IfcCostItem", props.cost_item_attributes, data)
+        props.active_cost_item_id = self.cost_item
+        props.cost_item_editing_type = "ATTRIBUTES"
+        return {"FINISHED"}
+
+
+class DisableEditingCostItem(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_cost_item"
+    bl_label = "Disable Editing Cost Item"
+
+    def execute(self, context):
+        context.scene.BIMCostProperties.active_cost_item_id = 0
+        return {"FINISHED"}
+
+
+class EditCostItem(bpy.types.Operator):
+    bl_idname = "bim.edit_cost_item"
+    bl_label = "Edit Cost Item"
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        attributes = blenderbim.bim.helper.export_attributes(props.cost_item_attributes)
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.edit_cost_item",
+            self.file,
+            **{"cost_item": self.file.by_id(props.active_cost_item_id), "attributes": attributes},
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.disable_editing_cost_item()
+        bpy.ops.bim.enable_editing_cost_items(cost_schedule=props.active_cost_schedule_id)
+        return {"FINISHED"}
+
+
+class AssignCostItemProduct(bpy.types.Operator):
+    bl_idname = "bim.assign_cost_item_product"
+    bl_label = "Assign Control"
+    cost_item: bpy.props.IntProperty()
+    related_object: bpy.props.StringProperty()
+
+    def execute(self, context):
+        related_objects = (
+            [bpy.data.objects.get(self.related_object)] if self.related_object else bpy.context.selected_objects
+        )
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.assign_cost_item_product",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+            products=[
+                self.file.by_id(o.BIMObjectProperties.ifc_definition_id)
+                for o in related_objects
+                if o.BIMObjectProperties.ifc_definition_id
+            ],
+        )
+        Data.load(self.file)
+        return {"FINISHED"}
+
+
+class UnassignCostItemProduct(bpy.types.Operator):
+    bl_idname = "bim.unassign_cost_item_product"
+    bl_label = "Unassign Control"
+    cost_item: bpy.props.IntProperty()
+    related_object: bpy.props.StringProperty()
+
+    def execute(self, context):
+        related_objects = (
+            [bpy.data.objects.get(self.related_object)] if self.related_object else bpy.context.selected_objects
+        )
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.unassign_cost_item_product",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+            products=[
+                self.file.by_id(o.BIMObjectProperties.ifc_definition_id)
+                for o in related_objects
+                if o.BIMObjectProperties.ifc_definition_id
+            ],
+        )
+        Data.load(self.file)
+        return {"FINISHED"}
+
+
+class EnableEditingCostItemQuantities(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_item_quantities"
+    bl_label = "Enable Editing Cost Item Quantities"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        props.active_cost_item_id = self.cost_item
+        props.cost_item_editing_type = "QUANTITIES"
+        purge()
+        return {"FINISHED"}
+
+
+class EnableEditingCostItemValues(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_item_values"
+    bl_label = "Enable Editing Cost Item Values"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        props.active_cost_item_id = self.cost_item
+        props.cost_item_editing_type = "VALUES"
+        bpy.ops.bim.disable_editing_cost_item_value()
+        return {"FINISHED"}
+
+
+class AddCostItemQuantity(bpy.types.Operator):
+    bl_idname = "bim.add_cost_item_quantity"
+    bl_label = "Add Cost Item Quantity"
+    cost_item: bpy.props.IntProperty()
+    ifc_class: bpy.props.StringProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        self.props = context.scene.BIMCostProperties
+        if self.props.quantity_types == "QTO":
+            self.add_quantities_from_qto_filter()
+        else:
+            self.add_manual_quantity()
+        Data.load(self.file)
+        return {"FINISHED"}
+
+    def add_quantities_from_qto_filter(self):
+        ifcopenshell.api.run(
+            "cost.assign_cost_item_product_quantities",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+            prop_name=self.props.quantity_names,
+        )
+
+    def add_manual_quantity(self):
+        ifcopenshell.api.run(
+            "cost.add_cost_item_quantity",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+            ifc_class=self.ifc_class,
+        )
+
+
+class RemoveCostItemQuantity(bpy.types.Operator):
+    bl_idname = "bim.remove_cost_item_quantity"
+    bl_label = "Add Cost Item Quantity"
+    cost_item: bpy.props.IntProperty()
+    physical_quantity: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.remove_cost_item_quantity",
+            self.file,
+            cost_item=self.file.by_id(self.cost_item),
+            physical_quantity=self.file.by_id(self.physical_quantity),
+        )
+        Data.load(self.file)
+        return {"FINISHED"}
+
+
+class EnableEditingCostItemQuantity(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_item_quantity"
+    bl_label = "Enable Editing Cost Item Quantity"
+    physical_quantity: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.props = context.scene.BIMCostProperties
+        while len(self.props.quantity_attributes) > 0:
+            self.props.quantity_attributes.remove(0)
+        self.props.active_cost_item_quantity_id = self.physical_quantity
+        data = Data.physical_quantities[self.physical_quantity]
+        blenderbim.bim.helper.import_attributes(data["type"], self.props.quantity_attributes, data)
+        return {"FINISHED"}
+
+
+class DisableEditingCostItemQuantity(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_cost_item_quantity"
+    bl_label = "Disable Editing Cost Item Quantity"
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        props.active_cost_item_quantity_id = 0
+        return {"FINISHED"}
+
+
+class EditCostItemQuantity(bpy.types.Operator):
+    bl_idname = "bim.edit_cost_item_quantity"
+    bl_label = "Edit Cost Item Quantity"
+    physical_quantity: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        attributes = blenderbim.bim.helper.export_attributes(props.quantity_attributes)
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.edit_cost_item_quantity",
+            self.file,
+            **{"physical_quantity": self.file.by_id(self.physical_quantity), "attributes": attributes},
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.disable_editing_cost_item_quantity()
+        return {"FINISHED"}
+
+
+class AddCostValue(bpy.types.Operator):
+    bl_idname = "bim.add_cost_value"
+    bl_label = "Add Cost Value"
+    parent: bpy.props.IntProperty()
+    cost_type: bpy.props.StringProperty()
+    cost_category: bpy.props.StringProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        if self.cost_type == "FIXED":
+            category = None
+        elif self.cost_type == "SUM":
+            category = "*"
+        elif self.cost_type == "CATEGORY":
+            category = self.cost_category
+        value = ifcopenshell.api.run("cost.add_cost_value", self.file, parent=self.file.by_id(self.parent))
+        ifcopenshell.api.run("cost.edit_cost_value", self.file, cost_value=value, attributes={"Category": category})
+        Data.load(self.file)
+        return {"FINISHED"}
+
+
+class RemoveCostItemValue(bpy.types.Operator):
+    bl_idname = "bim.remove_cost_item_value"
+    bl_label = "Add Cost Item Value"
+    cost_value: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run("cost.remove_cost_item_value", self.file, cost_value=self.file.by_id(self.cost_value))
+        Data.load(self.file)
+        return {"FINISHED"}
+
+
+class EnableEditingCostItemValue(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_cost_item_value"
+    bl_label = "Enable Editing Cost Item Value"
+    cost_value: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.props = context.scene.BIMCostProperties
+        while len(self.props.cost_value_attributes) > 0:
+            self.props.cost_value_attributes.remove(0)
+        self.props.active_cost_item_value_id = self.cost_value
+        data = Data.cost_values[self.cost_value]
+
+        blenderbim.bim.helper.import_attributes(
+            data["type"], self.props.cost_value_attributes, data, self.import_attributes
+        )
+        return {"FINISHED"}
+
+    def import_attributes(self, name, prop, data):
+        if name == "AppliedValue":
+            # TODO: for now, only support simple values
+            prop.data_type = "float"
+            prop.float_value = 0.0 if prop.is_null else data[name]
+            return True
+
+
+class DisableEditingCostItemValue(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_cost_item_value"
+    bl_label = "Disable Editing Cost Item Value"
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        props.active_cost_item_value_id = 0
+        return {"FINISHED"}
+
+
+class EditCostValue(bpy.types.Operator):
+    bl_idname = "bim.edit_cost_value"
+    bl_label = "Edit Cost Item Value"
+    cost_value: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMCostProperties
+        attributes = blenderbim.bim.helper.export_attributes(props.cost_value_attributes)
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.edit_cost_value",
+            self.file,
+            **{"cost_value": self.file.by_id(self.cost_value), "attributes": attributes},
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.disable_editing_cost_item_value()
+        return {"FINISHED"}
+
+
+class CopyCostItemValues(bpy.types.Operator):
+    bl_idname = "bim.copy_cost_item_values"
+    bl_label = "Copy Cost Item Values"
+    source: bpy.props.IntProperty()
+    destination: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.copy_cost_item_values",
+            self.file,
+            **{"source": self.file.by_id(self.source), "destination": self.file.by_id(self.destination)},
+        )
+        Data.load(IfcStore.get_file())
+        return {"FINISHED"}
+
+
+class SelectCostItemProducts(bpy.types.Operator):
+    bl_idname = "bim.select_cost_item_products"
+    bl_label = "Select Cost Item Products"
+    cost_item: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        related_products = Data.cost_items[self.cost_item]["Controls"]
+        for obj in bpy.context.visible_objects:
+            obj.select_set(False)
+            if obj.BIMObjectProperties.ifc_definition_id in related_products:
+                obj.select_set(True)
+        return {"FINISHED"}
+
+
+class SelectCostScheduleProducts(bpy.types.Operator):
+    bl_idname = "bim.select_cost_schedule_products"
+    bl_label = "Select Cost Schedule Products"
+    cost_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        self.related_products = []
+        for cost_item_id in Data.cost_schedules[self.cost_schedule]["Controls"]:
+            self.get_related_products(Data.cost_items[cost_item_id])
+        self.related_products = set(self.related_products)
+        for obj in bpy.context.visible_objects:
+            obj.select_set(False)
+            if obj.BIMObjectProperties.ifc_definition_id in self.related_products:
+                obj.select_set(True)
+        return {"FINISHED"}
+
+    def get_related_products(self, cost_item):
+        self.related_products.extend(cost_item["Controls"])
+        for child_id in cost_item["IsNestedBy"]:
+            self.get_related_products(Data.cost_items[child_id])

src/blenderbim/blenderbim/bim/module/cost/prop.py

@@ -0,0 +1,107 @@
+import bpy
+import ifcopenshell.api
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.cost.data import Data
+from ifcopenshell.api.pset.data import Data as PsetData
+from blenderbim.bim.prop import StrProperty, Attribute
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+
+quantitytypes_enum = []
+quantitynames_enum = []
+
+
+def purge():
+    global quantitytypes_enum
+    global quantitynames_enum
+    quantitytypes_enum = []
+    quantitynames_enum = []
+
+
+def getQuantityTypes(self, context):
+    global quantitytypes_enum
+    if len(quantitytypes_enum) == 0 and IfcStore.get_schema():
+        quantitytypes_enum = [("QTO", "Qto", "Derive quantities from IFC quantity sets")]
+        quantitytypes_enum.extend(
+            [
+                (t.name(), t.name(), "")
+                for t in IfcStore.get_schema().declaration_by_name("IfcPhysicalSimpleQuantity").subtypes()
+            ]
+        )
+    return quantitytypes_enum
+
+
+def getQuantityNames(self, context):
+    global quantitynames_enum
+    ifc_file = IfcStore.get_file()
+    if len(quantitynames_enum) == 0 and ifc_file:
+        names = set()
+        for element_id in Data.cost_items[self.active_cost_item_id]["Controls"]:
+            if element_id not in PsetData.products:
+                PsetData.load(IfcStore.get_file(), element_id)
+            for qto_id in PsetData.products[element_id]["qtos"]:
+                qto = PsetData.qtos[qto_id]
+                [names.add(PsetData.properties[p]["Name"]) for p in qto["Properties"]]
+        quantitynames_enum.extend([(n, n, "") for n in names])
+    return quantitynames_enum
+
+
+def updateCostItemName(self, context):
+    if self.name == "Unnamed":
+        return
+    self.file = IfcStore.get_file()
+    props = context.scene.BIMCostProperties
+    ifcopenshell.api.run(
+        "cost.edit_cost_item",
+        self.file,
+        **{"cost_item": self.file.by_id(self.ifc_definition_id), "attributes": {"Name": self.name}},
+    )
+    Data.load(IfcStore.get_file())
+    if props.active_cost_item_id == self.ifc_definition_id:
+        attribute = props.cost_item_attributes.get("Name")
+        attribute.string_value = self.name
+
+
+class CostItem(PropertyGroup):
+    name: StringProperty(name="Name", update=updateCostItemName)
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+    has_children: BoolProperty(name="Has Children")
+    is_expanded: BoolProperty(name="Is Expanded")
+    level_index: IntProperty(name="Level Index")
+
+
+class BIMCostProperties(PropertyGroup):
+    cost_schedule_attributes: CollectionProperty(name="Cost Schedule Attributes", type=Attribute)
+    is_editing: StringProperty(name="Is Editing")
+    active_cost_schedule_id: IntProperty(name="Active Cost Schedule Id")
+    cost_items: CollectionProperty(name="Work Calendar", type=CostItem)
+    active_cost_item_id: IntProperty(name="Active Cost Id")
+    cost_item_editing_type: StringProperty(name="Cost Item Editing Type")
+    active_cost_item_index: IntProperty(name="Active Cost Item Index")
+    cost_item_attributes: CollectionProperty(name="Task Attributes", type=Attribute)
+    contracted_cost_items: StringProperty(name="Contracted Cost Items", default="[]")
+    quantity_types: EnumProperty(items=getQuantityTypes, name="Quantity Types")
+    quantity_names: EnumProperty(items=getQuantityNames, name="Quantity Names")
+    active_cost_item_quantity_id: IntProperty(name="Active Cost Item Quantity Id")
+    quantity_attributes: CollectionProperty(name="Quantity Attributes", type=Attribute)
+    cost_types: EnumProperty(
+        items=[
+            ("FIXED", "Fixed", "The cost value is a fixed number"),
+            ("SUM", "Sum", "The cost value is automatically derived from the sum of all nested cost items"),
+            ("CATEGORY", "Category", "The cost value represents a single category"),
+        ],
+        name="Cost Types",
+    )
+    cost_category: StringProperty(name="Cost Category")
+    active_cost_item_value_id: IntProperty(name="Active Cost Item Value Id")
+    cost_value_attributes: CollectionProperty(name="Cost Value Attributes", type=Attribute)

src/blenderbim/blenderbim/bim/module/cost/ui.py

@@ -0,0 +1,300 @@
+from bpy.types import Panel, UIList
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.cost.data import Data
+
+
+class BIM_PT_cost_schedules(Panel):
+    bl_label = "IFC Cost Schedules"
+    bl_idname = "BIM_PT_cost_schedules"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        self.props = context.scene.BIMCostProperties
+
+        if not Data.is_loaded:
+            Data.load(IfcStore.get_file())
+
+        row = self.layout.row()
+        row.operator("bim.add_cost_schedule", icon="ADD")
+
+        for cost_schedule_id, cost_schedule in Data.cost_schedules.items():
+            self.draw_cost_schedule_ui(cost_schedule_id, cost_schedule)
+
+    def draw_cost_schedule_ui(self, cost_schedule_id, cost_schedule):
+        row = self.layout.row(align=True)
+        row.label(text=cost_schedule["Name"] or "Unnamed", icon="LINENUMBERS_ON")
+
+        if self.props.active_cost_schedule_id and self.props.active_cost_schedule_id == cost_schedule_id:
+            op = row.operator("bim.select_cost_schedule_products", icon="RESTRICT_SELECT_OFF", text="")
+            op.cost_schedule = cost_schedule_id
+            if self.props.is_editing == "COST_SCHEDULE":
+                row.operator("bim.edit_cost_schedule", text="", icon="CHECKMARK")
+            elif self.props.is_editing == "COST_ITEMS":
+                row.operator("bim.add_summary_cost_item", text="", icon="ADD").cost_schedule = cost_schedule_id
+            row.operator("bim.disable_editing_cost_schedule", text="", icon="CANCEL")
+        elif self.props.active_cost_schedule_id:
+            row.operator("bim.remove_cost_schedule", text="", icon="X").cost_schedule = cost_schedule_id
+        else:
+            row.operator("bim.enable_editing_cost_items", text="", icon="OUTLINER").cost_schedule = cost_schedule_id
+            row.operator(
+                "bim.enable_editing_cost_schedule", text="", icon="GREASEPENCIL"
+            ).cost_schedule = cost_schedule_id
+            row.operator("bim.remove_cost_schedule", text="", icon="X").cost_schedule = cost_schedule_id
+
+        if self.props.active_cost_schedule_id == cost_schedule_id:
+            if self.props.is_editing == "COST_SCHEDULE":
+                self.draw_editable_cost_schedule_ui()
+            elif self.props.is_editing == "COST_ITEMS":
+                self.draw_editable_cost_item_ui(cost_schedule_id)
+
+    def draw_editable_cost_schedule_ui(self):
+        for attribute in self.props.cost_schedule_attributes:
+            row = self.layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+    def draw_editable_cost_item_ui(self, cost_schedule_id):
+        self.layout.template_list(
+            "BIM_UL_cost_items",
+            "",
+            self.props,
+            "cost_items",
+            self.props,
+            "active_cost_item_index",
+        )
+        if self.props.active_cost_item_id:
+            if self.props.cost_item_editing_type == "ATTRIBUTES":
+                self.draw_editable_cost_item_attributes_ui()
+            elif self.props.cost_item_editing_type == "QUANTITIES":
+                self.draw_editable_cost_item_quantities_ui()
+            elif self.props.cost_item_editing_type == "VALUES":
+                self.draw_editable_cost_item_values_ui()
+
+    def draw_editable_cost_item_attributes_ui(self):
+        for attribute in self.props.cost_item_attributes:
+            row = self.layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+    def draw_editable_cost_item_quantities_ui(self):
+        row = self.layout.row(align=True)
+        row.prop(self.props, "quantity_types", text="")
+        if self.props.quantity_types == "QTO":
+            row.prop(self.props, "quantity_names", text="")
+        op = row.operator("bim.add_cost_item_quantity", text="", icon="ADD")
+        op.cost_item = self.props.active_cost_item_id
+        op.ifc_class = self.props.quantity_types
+
+        for quantity_id in Data.cost_items[self.props.active_cost_item_id]["CostQuantities"]:
+            quantity = Data.physical_quantities[quantity_id]
+            value = quantity[[k for k in quantity.keys() if "Value" in k][0]]
+            row = self.layout.row(align=True)
+            row.label(text=quantity["Name"])
+            row.label(text="{0:.2f}".format(value))
+            if self.props.active_cost_item_quantity_id and self.props.active_cost_item_quantity_id == quantity_id:
+                op = row.operator("bim.edit_cost_item_quantity", text="", icon="CHECKMARK")
+                op.physical_quantity = quantity_id
+                row.operator("bim.disable_editing_cost_item_quantity", text="", icon="CANCEL")
+            elif self.props.active_cost_item_quantity_id:
+                op = row.operator("bim.remove_cost_item_quantity", text="", icon="X")
+                op.cost_item = self.props.active_cost_item_id
+                op.physical_quantity = quantity_id
+            else:
+                op = row.operator("bim.enable_editing_cost_item_quantity", text="", icon="GREASEPENCIL")
+                op.physical_quantity = quantity_id
+                op = row.operator("bim.remove_cost_item_quantity", text="", icon="X")
+                op.cost_item = self.props.active_cost_item_id
+                op.physical_quantity = quantity_id
+
+            if self.props.active_cost_item_quantity_id and self.props.active_cost_item_quantity_id == quantity_id:
+                box = self.layout.box()
+                self.draw_editable_cost_item_quantity_ui(box)
+
+    def draw_editable_cost_item_quantity_ui(self, layout):
+        for attribute in self.props.quantity_attributes:
+            row = layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "float":
+                row.prop(attribute, "float_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+    def draw_editable_cost_item_values_ui(self):
+        row = self.layout.row(align=True)
+        row.prop(self.props, "cost_types", text="")
+        if self.props.cost_types == "CATEGORY":
+            row.prop(self.props, "cost_category", text="")
+        op = row.operator("bim.add_cost_value", text="", icon="ADD")
+        op.parent = self.props.active_cost_item_id
+        op.cost_type = self.props.cost_types
+        if self.props.cost_types == "CATEGORY":
+            op.cost_category = self.props.cost_category
+
+        for cost_value_id in Data.cost_items[self.props.active_cost_item_id]["CostValues"]:
+            row = self.layout.row(align=True)
+            self.draw_readonly_cost_value_ui(row, cost_value_id)
+
+        if self.props.active_cost_item_value_id:
+            box = self.layout.box()
+            self.draw_editable_cost_value_ui(box, Data.cost_values[self.props.active_cost_item_value_id])
+
+
+    def draw_readonly_cost_value_ui(self, layout, cost_value_id):
+        cost_value = Data.cost_values[cost_value_id]
+        cost_value_label = "{0:.2f}".format(cost_value["AppliedValue"])
+        if cost_value["Category"]:
+            cost_value_label += " ({})".format(cost_value["Category"])
+        layout.label(text="", icon="DISC")
+        self.draw_cost_value_operator_ui(layout, cost_value_id)
+        layout.label(text=cost_value_label)
+
+        for component_id in cost_value["Components"] or []:
+            self.draw_readonly_component_cost_value_ui(layout, component_id)
+
+    def draw_readonly_component_cost_value_ui(self, layout, cost_value_id, level=1):
+        self.draw_cost_value_operator_ui(layout, cost_value_id)
+        cost_value = Data.cost_values[cost_value_id]
+        cost_value_label = ">" * level
+        cost_value_label += "{0:.2f}".format(cost_value["AppliedValue"])
+        if cost_value["Category"]:
+            cost_value_label += " ({})".format(cost_value["Category"])
+        layout.label(text=cost_value_label)
+
+        for component_id in cost_value["Components"] or []:
+            self.draw_readonly_component_cost_value_ui(layout, component_id, level + 1)
+
+    def draw_cost_value_operator_ui(self, layout, cost_value_id):
+        if self.props.active_cost_item_value_id and self.props.active_cost_item_value_id == cost_value_id:
+            op = layout.operator("bim.edit_cost_value", text="", icon="CHECKMARK")
+            op.cost_value = cost_value_id
+            op = layout.operator("bim.add_cost_value", text="", icon="ADD")
+            op.parent = cost_value_id
+            op.cost_type = self.props.cost_types
+            if self.props.cost_types == "CATEGORY":
+                op.cost_category = self.props.cost_category
+            layout.operator("bim.disable_editing_cost_item_value", text="", icon="CANCEL")
+        elif self.props.active_cost_item_value_id:
+            op = layout.operator("bim.add_cost_value", text="", icon="ADD")
+            op.parent = cost_value_id
+            op.cost_type = self.props.cost_types
+            if self.props.cost_types == "CATEGORY":
+                op.cost_category = self.props.cost_category
+            op = layout.operator("bim.remove_cost_item_value", text="", icon="X")
+            op.cost_value = cost_value_id
+        else:
+            op = layout.operator("bim.enable_editing_cost_item_value", text="", icon="GREASEPENCIL")
+            op.cost_value = cost_value_id
+            op = layout.operator("bim.add_cost_value", text="", icon="ADD")
+            op.parent = cost_value_id
+            op.cost_type = self.props.cost_types
+            if self.props.cost_types == "CATEGORY":
+                op.cost_category = self.props.cost_category
+            op = layout.operator("bim.remove_cost_item_value", text="", icon="X")
+            op.cost_value = cost_value_id
+
+    def draw_editable_cost_value_ui(self, layout, cost_value):
+        for attribute in self.props.cost_value_attributes:
+            row = layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "float":
+                row.prop(attribute, "float_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+
+
+class BIM_UL_cost_items(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            props = context.scene.BIMCostProperties
+            cost_item = Data.cost_items[item.ifc_definition_id]
+            row = layout.row(align=True)
+
+            for i in range(0, item.level_index):
+                row.label(text="", icon="BLANK1")
+            if item.has_children:
+                if item.is_expanded:
+                    row.operator(
+                        "bim.contract_cost_item", text="", emboss=False, icon="DISCLOSURE_TRI_DOWN"
+                    ).cost_item = item.ifc_definition_id
+                else:
+                    row.operator(
+                        "bim.expand_cost_item", text="", emboss=False, icon="DISCLOSURE_TRI_RIGHT"
+                    ).cost_item = item.ifc_definition_id
+            else:
+                row.label(text="", icon="DOT")
+
+            split1 = row.split(factor=0.7)
+            split1.prop(item, "name", emboss=False, text="")
+
+            op = row.operator("bim.enable_editing_cost_item_quantities", text="", icon="PROPERTIES")
+            op.cost_item = item.ifc_definition_id
+            row.label(text="{0:.2f}".format(cost_item["TotalCostQuantity"]) + " (M3)")
+
+            op = row.operator("bim.enable_editing_cost_item_values", text="", icon="DISC")
+            op.cost_item = item.ifc_definition_id
+            row.label(text="{0:.2f}".format(cost_item["TotalAppliedValue"]))
+            row.label(text="{0:.2f}".format(cost_item["TotalCostValue"]), icon="CON_TRANSLIKE")
+
+            if context.active_object:
+                oprops = context.active_object.BIMObjectProperties
+                row = layout.row(align=True)
+                if oprops.ifc_definition_id in cost_item["Controls"]:
+                    op = row.operator("bim.unassign_cost_item_product", text="", icon="KEYFRAME_HLT", emboss=False)
+                    op.cost_item = item.ifc_definition_id
+                else:
+                    op = row.operator("bim.assign_cost_item_product", text="", icon="KEYFRAME", emboss=False)
+                    op.cost_item = item.ifc_definition_id
+
+            if props.active_cost_item_id == item.ifc_definition_id:
+                if props.cost_item_editing_type == "ATTRIBUTES":
+                    row.operator("bim.edit_cost_item", text="", icon="CHECKMARK")
+                row.operator("bim.disable_editing_cost_item", text="", icon="CANCEL")
+            elif props.active_cost_item_id:
+                if props.cost_item_editing_type == "VALUES":
+                    op = row.operator("bim.copy_cost_item_values", text="", icon="COPYDOWN")
+                    op.source = props.active_cost_item_id
+                    op.destination = item.ifc_definition_id
+                row.operator("bim.add_cost_item", text="", icon="ADD").cost_item = item.ifc_definition_id
+                row.operator("bim.remove_cost_item", text="", icon="X").cost_item = item.ifc_definition_id
+            else:
+                op = row.operator("bim.select_cost_item_products", icon="RESTRICT_SELECT_OFF", text="")
+                op.cost_item = item.ifc_definition_id
+                row.operator(
+                    "bim.enable_editing_cost_item", text="", icon="GREASEPENCIL"
+                ).cost_item = item.ifc_definition_id
+                row.operator("bim.add_cost_item", text="", icon="ADD").cost_item = item.ifc_definition_id
+                row.operator("bim.remove_cost_item", text="", icon="X").cost_item = item.ifc_definition_id

src/blenderbim/blenderbim/bim/module/csv/operator.py

@@ -13,6 +13,7 @@ from blenderbim.bim.handler import purge_module_data
 class AddCsvAttribute(bpy.types.Operator):
     bl_idname = "bim.add_csv_attribute"
     bl_label = "Add CSV Attribute"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         attribute = context.scene.CsvProperties.csv_attributes.add()
@@ -22,6 +23,7 @@ class AddCsvAttribute(bpy.types.Operator):
 class RemoveCsvAttribute(bpy.types.Operator):
     bl_idname = "bim.remove_csv_attribute"
     bl_label = "Remove CSV Attribute"
+    bl_options = {"REGISTER", "UNDO"}
     index: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -98,6 +100,7 @@ class ImportIfcCsv(bpy.types.Operator):
 class EyedropIfcCsv(bpy.types.Operator):
     bl_idname = "bim.eyedrop_ifccsv"
     bl_label = "Query Selected Items"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         global_ids = []
@@ -112,11 +115,11 @@ class EyedropIfcCsv(bpy.types.Operator):
 class SelectCsvIfcFile(bpy.types.Operator):
     bl_idname = "bim.select_csv_ifc_file"
     bl_label = "Select CSV IFC File"
+    bl_options = {"REGISTER", "UNDO"}
     filename_ext = ".ifc"
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
 
-
     def execute(self, context):
         context.scene.CsvProperties.csv_ifc_file = self.filepath
         return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/debug/__init__.py

@@ -2,6 +2,8 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
+    operator.PrintIfcFile,
+    operator.ValidateIfcFile,
     operator.ProfileImportIFC,
     operator.CreateAllShapes,
     operator.CreateShapeFromStepId,

src/blenderbim/blenderbim/bim/module/debug/operator.py

@@ -5,6 +5,28 @@ import blenderbim.bim.import_ifc as import_ifc
 from blenderbim.bim.ifc import IfcStore
 
 
+class PrintIfcFile(bpy.types.Operator):
+    bl_idname = "bim.print_ifc_file"
+    bl_label = "Print IFC File"
+
+    def execute(self, context):
+        print(IfcStore.get_file().wrapped_data.to_string())
+        return {"FINISHED"}
+
+
+class ValidateIfcFile(bpy.types.Operator):
+    bl_idname = "bim.validate_ifc_file"
+    bl_label = "Validate IFC File"
+
+    def execute(self, context):
+        import ifcopenshell.validate
+
+        logger = logging.getLogger("validate")
+        logger.setLevel(logging.DEBUG)
+        ifcopenshell.validate.validate(IfcStore.get_file(), logger)
+        return {"FINISHED"}
+
+
 class ProfileImportIFC(bpy.types.Operator):
     bl_idname = "bim.profile_import_ifc"
     bl_label = "Profile Import IFC"

src/blenderbim/blenderbim/bim/module/debug/ui.py

@@ -20,6 +20,9 @@ class BIM_PT_debug(Panel):
         row.operator("bim.validate_ifc_file", icon="CHECKMARK", text="")
         row.operator("bim.select_ifc_file", icon="FILE_FOLDER", text="")
 
+        row = layout.row()
+        row.operator("bim.print_ifc_file")
+
         row = layout.row()
         row.operator("bim.create_all_shapes")
 

src/blenderbim/blenderbim/bim/module/document/operator.py

@@ -9,6 +9,7 @@ from ifcopenshell.api.document.data import Data
 class LoadInformation(bpy.types.Operator):
     bl_idname = "bim.load_information"
     bl_label = "Load Information"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         self.file = IfcStore.get_file()
@@ -31,6 +32,7 @@ class LoadInformation(bpy.types.Operator):
 class LoadDocumentReferences(bpy.types.Operator):
     bl_idname = "bim.load_document_references"
     bl_label = "Load Document References"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         self.file = IfcStore.get_file()
@@ -53,6 +55,7 @@ class LoadDocumentReferences(bpy.types.Operator):
 class DisableDocumentEditingUI(bpy.types.Operator):
     bl_idname = "bim.disable_document_editing_ui"
     bl_label = "Disable Document Editing UI"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMDocumentProperties.is_editing = ""
@@ -63,6 +66,7 @@ class DisableDocumentEditingUI(bpy.types.Operator):
 class EnableEditingDocument(bpy.types.Operator):
     bl_idname = "bim.enable_editing_document"
     bl_label = "Enable Editing Document"
+    bl_options = {"REGISTER", "UNDO"}
     document: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -99,6 +103,7 @@ class EnableEditingDocument(bpy.types.Operator):
 class DisableEditingDocument(bpy.types.Operator):
     bl_idname = "bim.disable_editing_document"
     bl_label = "Disable Editing Document"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMDocumentProperties.active_document_id = 0
@@ -108,8 +113,12 @@ class DisableEditingDocument(bpy.types.Operator):
 class AddInformation(bpy.types.Operator):
     bl_idname = "bim.add_information"
     bl_label = "Add Information"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         result = ifcopenshell.api.run("document.add_information", IfcStore.get_file())
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_information()
@@ -120,8 +129,12 @@ class AddInformation(bpy.types.Operator):
 class AddDocumentReference(bpy.types.Operator):
     bl_idname = "bim.add_document_reference"
     bl_label = "Add Document Reference"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         result = ifcopenshell.api.run("document.add_reference", IfcStore.get_file())
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_document_references()
@@ -132,8 +145,12 @@ class AddDocumentReference(bpy.types.Operator):
 class EditInformation(bpy.types.Operator):
     bl_idname = "bim.edit_information"
     bl_label = "Edit Information"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMDocumentProperties
         attributes = {}
         for attribute in props.document_attributes:
@@ -157,8 +174,12 @@ class EditInformation(bpy.types.Operator):
 class EditDocumentReference(bpy.types.Operator):
     bl_idname = "bim.edit_document_reference"
     bl_label = "Edit Document Reference"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMDocumentProperties
         attributes = {}
         for attribute in props.document_attributes:
@@ -180,9 +201,13 @@ class EditDocumentReference(bpy.types.Operator):
 class RemoveDocument(bpy.types.Operator):
     bl_idname = "bim.remove_document"
     bl_label = "Remove Document"
+    bl_options = {"REGISTER", "UNDO"}
     document: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMDocumentProperties
         self.file = IfcStore.get_file()
         ifcopenshell.api.run("document.remove_document", self.file, **{"document": self.file.by_id(self.document)})
@@ -197,6 +222,7 @@ class RemoveDocument(bpy.types.Operator):
 class EnableAssigningDocument(bpy.types.Operator):
     bl_idname = "bim.enable_assigning_document"
     bl_label = "Enable Assigning Document"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -213,6 +239,7 @@ class EnableAssigningDocument(bpy.types.Operator):
 class DisableAssigningDocument(bpy.types.Operator):
     bl_idname = "bim.disable_assigning_document"
     bl_label = "Disable Assigning Document"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -225,10 +252,14 @@ class DisableAssigningDocument(bpy.types.Operator):
 class AssignDocument(bpy.types.Operator):
     bl_idname = "bim.assign_document"
     bl_label = "Assign Document"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     document: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -246,10 +277,14 @@ class AssignDocument(bpy.types.Operator):
 class UnassignDocument(bpy.types.Operator):
     bl_idname = "bim.unassign_document"
     bl_label = "Unassign Document"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     document: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(

src/blenderbim/blenderbim/bim/module/document/ui.py

@@ -68,6 +68,8 @@ class BIM_PT_object_documents(Panel):
 
     @classmethod
     def poll(cls, context):
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
         return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
 
     def draw(self, context):

src/blenderbim/blenderbim/bim/module/drawing/__init__.py

@@ -1,16 +1,76 @@
 import bpy
-from . import ui, operator
+from . import ui, prop, operator, handler, gizmos
 
 classes = (
     operator.AddDrawing,
     operator.CreateDrawing,
+    operator.AddAnnotation,
+    operator.AddSheet,
+    operator.OpenSheet,
+    operator.AddDrawingToSheet,
+    operator.CreateSheets,
+    operator.OpenView,
+    operator.OpenViewCamera,
+    operator.ActivateView,
+    operator.SelectDocIfcFile,
+    operator.GenerateReferences,
+    operator.ResizeText,
+    operator.AddVariable,
+    operator.RemoveVariable,
+    operator.PropagateTextData,
+    operator.RemoveDrawing,
+    operator.AddDrawingStyle,
+    operator.RemoveDrawingStyle,
+    operator.SaveDrawingStyle,
+    operator.ActivateDrawingStyle,
+    operator.EditVectorStyle,
+    operator.RemoveSheet,
+    operator.AddSchedule,
+    operator.RemoveSchedule,
+    operator.SelectScheduleFile,
+    operator.BuildSchedule,
+    operator.AddScheduleToSheet,
+    operator.AddDrawingStyleAttribute,
+    operator.RemoveDrawingStyleAttribute,
+    operator.RefreshDrawingList,
+    operator.CleanWireframes,
+    operator.CopyGrid,
+    operator.AddSectionsAnnotations,
+    prop.Variable,
+    prop.Drawing,
+    prop.Schedule,
+    prop.DrawingStyle,
+    prop.Sheet,
+    prop.DocProperties,
+    prop.BIMCameraProperties,
+    prop.BIMTextProperties,
     ui.BIM_PT_camera,
+    ui.BIM_PT_drawing_underlay,
+    ui.BIM_PT_drawings,
+    ui.BIM_PT_schedules,
+    ui.BIM_PT_sheets,
+    ui.BIM_PT_text,
+    ui.BIM_PT_annotation_utilities,
+    ui.BIM_UL_drawinglist,
+    gizmos.UglyDotGizmo,
+    gizmos.DotGizmo,
+    gizmos.DimensionLabelGizmo,
+    gizmos.ExtrusionGuidesGizmo,
+    gizmos.ExtrusionWidget,
 )
 
 
 def register():
-    pass
+    bpy.types.Scene.DocProperties = bpy.props.PointerProperty(type=prop.DocProperties)
+    bpy.types.Camera.BIMCameraProperties = bpy.props.PointerProperty(type=prop.BIMCameraProperties)
+    bpy.types.TextCurve.BIMTextProperties = bpy.props.PointerProperty(type=prop.BIMTextProperties)
+    bpy.app.handlers.load_post.append(handler.toggleDecorationsOnLoad)
+    bpy.app.handlers.depsgraph_update_pre.append(handler.depsgraph_update_pre_handler)
 
 
 def unregister():
-    pass
+    del bpy.types.Scene.DocProperties
+    del bpy.types.Camera.BIMCameraProperties
+    del bpy.types.TextCurve.BIMTextProperties
+    bpy.app.handlers.load_post.remove(handler.toggleDecorationsOnLoad)
+    bpy.app.handlers.depsgraph_update_pre.remove(handler.depsgraph_update_pre_handler)

src/blenderbim/blenderbim/bim/module/drawing/annotation.py

@@ -17,9 +17,9 @@ class Annotator:
 
     @staticmethod
     def add_text(related_element=None):
-        curve = bpy.data.curves.new(type="FONT", name="Plan/Annotation/PLAN_VIEW/Text")
+        curve = bpy.data.curves.new(type="FONT", name="Text")
         curve.body = "TEXT"
-        obj = bpy.data.objects.new("IfcAnnotation/Text", curve)
+        obj = bpy.data.objects.new("Text", curve)
         obj.matrix_world = bpy.context.scene.camera.matrix_world
         if related_element is None:
             location, _, _, _ = Annotator.get_placeholder_coords()
@@ -138,12 +138,12 @@ class Annotator:
             if name in obj.name:
                 return obj
         if data_type == "mesh":
-            data = bpy.data.meshes.new("Plan/Annotation/PLAN_VIEW/" + name)
+            data = bpy.data.meshes.new(name)
         elif data_type == "curve":
-            data = bpy.data.curves.new("Plan/Annotation/PLAN_VIEW/" + name, type="CURVE")
+            data = bpy.data.curves.new(name, type="CURVE")
             data.dimensions = "3D"
             data.resolution_u = 2
-        obj = bpy.data.objects.new("IfcAnnotation/" + name, data)
+        obj = bpy.data.objects.new(name, data)
         collection.objects.link(obj)
         return obj
 
@@ -164,4 +164,4 @@ class Annotator:
         return (camera.location + z_offset,
                 camera.location + z_offset + y_offset,
                 camera.location + z_offset + x_offset,
-                camera.location + z_offset + x_offset + y_offset)
+                camera.location + z_offset + x_offset + y_offset)

src/blenderbim/blenderbim/bim/module/drawing/decoration.py

@@ -13,7 +13,7 @@ import gpu
 import bgl
 from gpu.types import GPUShader, GPUBatch, GPUIndexBuf, GPUVertBuf, GPUVertFormat
 from gpu_extras.batch import batch_for_shader
-from . import helper
+import blenderbim.bim.module.drawing.helper as helper
 
 
 class BaseDecorator():
@@ -992,7 +992,7 @@ class GridDecorator(BaseDecorator):
         p0 = location_3d_to_region_2d(region, region3d, v0)
         p1 = location_3d_to_region_2d(region, region3d, v1)
         dir = Vector((1, 0))
-        text = obj.BIMObjectProperties.attributes['AxisTag'].string_value
+        text = obj.name.split("/")[1].split(".")[0]
         self.draw_label(context, text, p0, dir, vcenter=True, gap=0)
         self.draw_label(context, text, p1, dir, vcenter=True, gap=0)
 

src/blenderbim/blenderbim/bim/module/drawing/gizmos.py

@@ -1,14 +1,12 @@
 import bpy
 import blf
-from bpy import types
 import math
+import gpu, bgl
+from bpy import types
 from mathutils import Vector, Matrix
 from mathutils import geometry
-import gpu, bgl
 from bpy_extras import view3d_utils
-
-
-from .shaders import DotsGizmoShader, ExtrusionGuidesShader, BaseLinesShader
+from blenderbim.bim.module.drawing.shaders import DotsGizmoShader, ExtrusionGuidesShader, BaseLinesShader
 
 
 """Gizmos under the hood
@@ -43,76 +41,196 @@ draw_select -- fake-draw of selection geometry for gpu-side cursor tracking
 # some geometries for Gizmo.custom_shape shaders
 
 CUBE = (
-    (+1, +1, +1), (-1, +1, +1), (+1, -1, +1),  # top
-    (+1, -1, +1), (-1, +1, +1), (-1, -1, +1),
-    (+1, +1, +1), (+1, -1, +1), (+1, +1, -1),  # right
-    (+1, +1, -1), (+1, -1, +1), (+1, -1, -1),
-    (+1, +1, +1), (+1, +1, -1), (-1, +1, +1),  # back
-    (-1, +1, +1), (+1, +1, -1), (-1, +1, -1),
-    (-1, -1, -1), (-1, +1, -1), (+1, -1, -1),  # bot
-    (+1, -1, -1), (-1, +1, -1), (+1, +1, -1),
-    (-1, -1, -1), (-1, -1, +1), (-1, +1, -1),  # left
-    (-1, +1, -1), (-1, -1, +1), (-1, +1, +1),
-    (-1, -1, -1), (+1, -1, -1), (-1, -1, +1),  # front
-    (-1, -1, +1), (+1, -1, -1), (+1, -1, +1)
+    (+1, +1, +1),
+    (-1, +1, +1),
+    (+1, -1, +1),  # top
+    (+1, -1, +1),
+    (-1, +1, +1),
+    (-1, -1, +1),
+    (+1, +1, +1),
+    (+1, -1, +1),
+    (+1, +1, -1),  # right
+    (+1, +1, -1),
+    (+1, -1, +1),
+    (+1, -1, -1),
+    (+1, +1, +1),
+    (+1, +1, -1),
+    (-1, +1, +1),  # back
+    (-1, +1, +1),
+    (+1, +1, -1),
+    (-1, +1, -1),
+    (-1, -1, -1),
+    (-1, +1, -1),
+    (+1, -1, -1),  # bot
+    (+1, -1, -1),
+    (-1, +1, -1),
+    (+1, +1, -1),
+    (-1, -1, -1),
+    (-1, -1, +1),
+    (-1, +1, -1),  # left
+    (-1, +1, -1),
+    (-1, -1, +1),
+    (-1, +1, +1),
+    (-1, -1, -1),
+    (+1, -1, -1),
+    (-1, -1, +1),  # front
+    (-1, -1, +1),
+    (+1, -1, -1),
+    (+1, -1, +1),
 )
 
 DISC = (
-    (0.0, 0.0, 0.0), (1.0, 0.0, 0), (0.8660254037844387, 0.49999999999999994, 0),
-    (0.0, 0.0, 0.0), (0.8660254037844387, 0.49999999999999994, 0), (0.5000000000000001, 0.8660254037844386, 0),
-    (0.0, 0.0, 0.0), (0.5000000000000001, 0.8660254037844386, 0), (6.123233995736766e-17, 1.0, 0),
-    (0.0, 0.0, 0.0), (6.123233995736766e-17, 1.0, 0), (-0.4999999999999998, 0.8660254037844387, 0),
-    (0.0, 0.0, 0.0), (-0.4999999999999998, 0.8660254037844387, 0), (-0.8660254037844385, 0.5000000000000003, 0),
-    (0.0, 0.0, 0.0), (-0.8660254037844385, 0.5000000000000003, 0), (-1.0, 1.2246467991473532e-16, 0),
-    (0.0, 0.0, 0.0), (-1.0, 1.2246467991473532e-16, 0), (-0.8660254037844388, -0.4999999999999997, 0),
-    (0.0, 0.0, 0.0), (-0.8660254037844388, -0.4999999999999997, 0), (-0.5000000000000004, -0.8660254037844384, 0),
-    (0.0, 0.0, 0.0), (-0.5000000000000004, -0.8660254037844384, 0), (-1.8369701987210297e-16, -1.0, 0),
-    (0.0, 0.0, 0.0), (-1.8369701987210297e-16, -1.0, 0), (0.49999999999999933, -0.866025403784439, 0),
-    (0.0, 0.0, 0.0), (0.49999999999999933, -0.866025403784439, 0), (0.8660254037844384, -0.5000000000000004, 0),
-    (0.0, 0.0, 0.0), (0.8660254037844384, -0.5000000000000004, 0), (1.0, 0.0, 0),
+    (0.0, 0.0, 0.0),
+    (1.0, 0.0, 0),
+    (0.8660254037844387, 0.49999999999999994, 0),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844387, 0.49999999999999994, 0),
+    (0.5000000000000001, 0.8660254037844386, 0),
+    (0.0, 0.0, 0.0),
+    (0.5000000000000001, 0.8660254037844386, 0),
+    (6.123233995736766e-17, 1.0, 0),
+    (0.0, 0.0, 0.0),
+    (6.123233995736766e-17, 1.0, 0),
+    (-0.4999999999999998, 0.8660254037844387, 0),
+    (0.0, 0.0, 0.0),
+    (-0.4999999999999998, 0.8660254037844387, 0),
+    (-0.8660254037844385, 0.5000000000000003, 0),
+    (0.0, 0.0, 0.0),
+    (-0.8660254037844385, 0.5000000000000003, 0),
+    (-1.0, 1.2246467991473532e-16, 0),
+    (0.0, 0.0, 0.0),
+    (-1.0, 1.2246467991473532e-16, 0),
+    (-0.8660254037844388, -0.4999999999999997, 0),
+    (0.0, 0.0, 0.0),
+    (-0.8660254037844388, -0.4999999999999997, 0),
+    (-0.5000000000000004, -0.8660254037844384, 0),
+    (0.0, 0.0, 0.0),
+    (-0.5000000000000004, -0.8660254037844384, 0),
+    (-1.8369701987210297e-16, -1.0, 0),
+    (0.0, 0.0, 0.0),
+    (-1.8369701987210297e-16, -1.0, 0),
+    (0.49999999999999933, -0.866025403784439, 0),
+    (0.0, 0.0, 0.0),
+    (0.49999999999999933, -0.866025403784439, 0),
+    (0.8660254037844384, -0.5000000000000004, 0),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844384, -0.5000000000000004, 0),
+    (1.0, 0.0, 0),
 )
 
 X3DISC = (
-    (0.0, 0.0, 0.0), (1.0, 0.0, 0), (0.8660254037844387, 0.49999999999999994, 0),
-    (0.0, 0.0, 0.0), (0.8660254037844387, 0.49999999999999994, 0), (0.5000000000000001, 0.8660254037844386, 0),
-    (0.0, 0.0, 0.0), (0.5000000000000001, 0.8660254037844386, 0), (6.123233995736766e-17, 1.0, 0),
-    (0.0, 0.0, 0.0), (6.123233995736766e-17, 1.0, 0), (-0.4999999999999998, 0.8660254037844387, 0),
-    (0.0, 0.0, 0.0), (-0.4999999999999998, 0.8660254037844387, 0), (-0.8660254037844385, 0.5000000000000003, 0),
-    (0.0, 0.0, 0.0), (-0.8660254037844385, 0.5000000000000003, 0), (-1.0, 1.2246467991473532e-16, 0),
-    (0.0, 0.0, 0.0), (-1.0, 1.2246467991473532e-16, 0), (-0.8660254037844388, -0.4999999999999997, 0),
-    (0.0, 0.0, 0.0), (-0.8660254037844388, -0.4999999999999997, 0), (-0.5000000000000004, -0.8660254037844384, 0),
-    (0.0, 0.0, 0.0), (-0.5000000000000004, -0.8660254037844384, 0), (-1.8369701987210297e-16, -1.0, 0),
-    (0.0, 0.0, 0.0), (-1.8369701987210297e-16, -1.0, 0), (0.49999999999999933, -0.866025403784439, 0),
-    (0.0, 0.0, 0.0), (0.49999999999999933, -0.866025403784439, 0), (0.8660254037844384, -0.5000000000000004, 0),
-    (0.0, 0.0, 0.0), (0.8660254037844384, -0.5000000000000004, 0), (1.0, 0.0, 0),
-    (0.0, 0.0, 0.0), (0, 1.0, 0.0), (0, 0.8660254037844387, 0.49999999999999994),
-    (0.0, 0.0, 0.0), (0, 0.8660254037844387, 0.49999999999999994), (0, 0.5000000000000001, 0.8660254037844386),
-    (0.0, 0.0, 0.0), (0, 0.5000000000000001, 0.8660254037844386), (0, 6.123233995736766e-17, 1.0),
-    (0.0, 0.0, 0.0), (0, 6.123233995736766e-17, 1.0), (0, -0.4999999999999998, 0.8660254037844387),
-    (0.0, 0.0, 0.0), (0, -0.4999999999999998, 0.8660254037844387), (0, -0.8660254037844385, 0.5000000000000003),
-    (0.0, 0.0, 0.0), (0, -0.8660254037844385, 0.5000000000000003), (0, -1.0, 1.2246467991473532e-16),
-    (0.0, 0.0, 0.0), (0, -1.0, 1.2246467991473532e-16), (0, -0.8660254037844388, -0.4999999999999997),
-    (0.0, 0.0, 0.0), (0, -0.8660254037844388, -0.4999999999999997), (0, -0.5000000000000004, -0.8660254037844384),
-    (0.0, 0.0, 0.0), (0, -0.5000000000000004, -0.8660254037844384), (0, -1.8369701987210297e-16, -1.0),
-    (0.0, 0.0, 0.0), (0, -1.8369701987210297e-16, -1.0), (0, 0.49999999999999933, -0.866025403784439),
-    (0.0, 0.0, 0.0), (0, 0.49999999999999933, -0.866025403784439), (0, 0.8660254037844384, -0.5000000000000004),
-    (0.0, 0.0, 0.0), (0, 0.8660254037844384, -0.5000000000000004), (0, 1.0, 0.0),
-    (0.0, 0.0, 0.0), (0.0, 0, 1.0), (0.49999999999999994, 0, 0.8660254037844387),
-    (0.0, 0.0, 0.0), (0.49999999999999994, 0, 0.8660254037844387), (0.8660254037844386, 0, 0.5000000000000001),
-    (0.0, 0.0, 0.0), (0.8660254037844386, 0, 0.5000000000000001), (1.0, 0, 6.123233995736766e-17),
-    (0.0, 0.0, 0.0), (1.0, 0, 6.123233995736766e-17), (0.8660254037844387, 0, -0.4999999999999998),
-    (0.0, 0.0, 0.0), (0.8660254037844387, 0, -0.4999999999999998), (0.5000000000000003, 0, -0.8660254037844385),
-    (0.0, 0.0, 0.0), (0.5000000000000003, 0, -0.8660254037844385), (1.2246467991473532e-16, 0, -1.0),
-    (0.0, 0.0, 0.0), (1.2246467991473532e-16, 0, -1.0), (-0.4999999999999997, 0, -0.8660254037844388),
-    (0.0, 0.0, 0.0), (-0.4999999999999997, 0, -0.8660254037844388), (-0.8660254037844384, 0, -0.5000000000000004),
-    (0.0, 0.0, 0.0), (-0.8660254037844384, 0, -0.5000000000000004), (-1.0, 0, -1.8369701987210297e-16),
-    (0.0, 0.0, 0.0), (-1.0, 0, -1.8369701987210297e-16), (-0.866025403784439, 0, 0.49999999999999933),
-    (0.0, 0.0, 0.0), (-0.866025403784439, 0, 0.49999999999999933), (-0.5000000000000004, 0, 0.8660254037844384),
-    (0.0, 0.0, 0.0), (-0.5000000000000004, 0, 0.8660254037844384), (0.0, 0, 1.0),
+    (0.0, 0.0, 0.0),
+    (1.0, 0.0, 0),
+    (0.8660254037844387, 0.49999999999999994, 0),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844387, 0.49999999999999994, 0),
+    (0.5000000000000001, 0.8660254037844386, 0),
+    (0.0, 0.0, 0.0),
+    (0.5000000000000001, 0.8660254037844386, 0),
+    (6.123233995736766e-17, 1.0, 0),
+    (0.0, 0.0, 0.0),
+    (6.123233995736766e-17, 1.0, 0),
+    (-0.4999999999999998, 0.8660254037844387, 0),
+    (0.0, 0.0, 0.0),
+    (-0.4999999999999998, 0.8660254037844387, 0),
+    (-0.8660254037844385, 0.5000000000000003, 0),
+    (0.0, 0.0, 0.0),
+    (-0.8660254037844385, 0.5000000000000003, 0),
+    (-1.0, 1.2246467991473532e-16, 0),
+    (0.0, 0.0, 0.0),
+    (-1.0, 1.2246467991473532e-16, 0),
+    (-0.8660254037844388, -0.4999999999999997, 0),
+    (0.0, 0.0, 0.0),
+    (-0.8660254037844388, -0.4999999999999997, 0),
+    (-0.5000000000000004, -0.8660254037844384, 0),
+    (0.0, 0.0, 0.0),
+    (-0.5000000000000004, -0.8660254037844384, 0),
+    (-1.8369701987210297e-16, -1.0, 0),
+    (0.0, 0.0, 0.0),
+    (-1.8369701987210297e-16, -1.0, 0),
+    (0.49999999999999933, -0.866025403784439, 0),
+    (0.0, 0.0, 0.0),
+    (0.49999999999999933, -0.866025403784439, 0),
+    (0.8660254037844384, -0.5000000000000004, 0),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844384, -0.5000000000000004, 0),
+    (1.0, 0.0, 0),
+    (0.0, 0.0, 0.0),
+    (0, 1.0, 0.0),
+    (0, 0.8660254037844387, 0.49999999999999994),
+    (0.0, 0.0, 0.0),
+    (0, 0.8660254037844387, 0.49999999999999994),
+    (0, 0.5000000000000001, 0.8660254037844386),
+    (0.0, 0.0, 0.0),
+    (0, 0.5000000000000001, 0.8660254037844386),
+    (0, 6.123233995736766e-17, 1.0),
+    (0.0, 0.0, 0.0),
+    (0, 6.123233995736766e-17, 1.0),
+    (0, -0.4999999999999998, 0.8660254037844387),
+    (0.0, 0.0, 0.0),
+    (0, -0.4999999999999998, 0.8660254037844387),
+    (0, -0.8660254037844385, 0.5000000000000003),
+    (0.0, 0.0, 0.0),
+    (0, -0.8660254037844385, 0.5000000000000003),
+    (0, -1.0, 1.2246467991473532e-16),
+    (0.0, 0.0, 0.0),
+    (0, -1.0, 1.2246467991473532e-16),
+    (0, -0.8660254037844388, -0.4999999999999997),
+    (0.0, 0.0, 0.0),
+    (0, -0.8660254037844388, -0.4999999999999997),
+    (0, -0.5000000000000004, -0.8660254037844384),
+    (0.0, 0.0, 0.0),
+    (0, -0.5000000000000004, -0.8660254037844384),
+    (0, -1.8369701987210297e-16, -1.0),
+    (0.0, 0.0, 0.0),
+    (0, -1.8369701987210297e-16, -1.0),
+    (0, 0.49999999999999933, -0.866025403784439),
+    (0.0, 0.0, 0.0),
+    (0, 0.49999999999999933, -0.866025403784439),
+    (0, 0.8660254037844384, -0.5000000000000004),
+    (0.0, 0.0, 0.0),
+    (0, 0.8660254037844384, -0.5000000000000004),
+    (0, 1.0, 0.0),
+    (0.0, 0.0, 0.0),
+    (0.0, 0, 1.0),
+    (0.49999999999999994, 0, 0.8660254037844387),
+    (0.0, 0.0, 0.0),
+    (0.49999999999999994, 0, 0.8660254037844387),
+    (0.8660254037844386, 0, 0.5000000000000001),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844386, 0, 0.5000000000000001),
+    (1.0, 0, 6.123233995736766e-17),
+    (0.0, 0.0, 0.0),
+    (1.0, 0, 6.123233995736766e-17),
+    (0.8660254037844387, 0, -0.4999999999999998),
+    (0.0, 0.0, 0.0),
+    (0.8660254037844387, 0, -0.4999999999999998),
+    (0.5000000000000003, 0, -0.8660254037844385),
+    (0.0, 0.0, 0.0),
+    (0.5000000000000003, 0, -0.8660254037844385),
+    (1.2246467991473532e-16, 0, -1.0),
+    (0.0, 0.0, 0.0),
+    (1.2246467991473532e-16, 0, -1.0),
+    (-0.4999999999999997, 0, -0.8660254037844388),
+    (0.0, 0.0, 0.0),
+    (-0.4999999999999997, 0, -0.8660254037844388),
+    (-0.8660254037844384, 0, -0.5000000000000004),
+    (0.0, 0.0, 0.0),
+    (-0.8660254037844384, 0, -0.5000000000000004),
+    (-1.0, 0, -1.8369701987210297e-16),
+    (0.0, 0.0, 0.0),
+    (-1.0, 0, -1.8369701987210297e-16),
+    (-0.866025403784439, 0, 0.49999999999999933),
+    (0.0, 0.0, 0.0),
+    (-0.866025403784439, 0, 0.49999999999999933),
+    (-0.5000000000000004, 0, 0.8660254037844384),
+    (0.0, 0.0, 0.0),
+    (-0.5000000000000004, 0, 0.8660254037844384),
+    (0.0, 0, 1.0),
 )
 
 
-class CustomGizmo():
+class CustomGizmo:
     # FIXME: highliting/selection doesnt work
     def draw_very_custom_shape(self, ctx, custom_shape, select_id=None):
         # similar to draw_custom_shape
@@ -127,7 +245,7 @@ class CustomGizmo():
                 color = (*self.color_highlight, self.alpha_highlight)
             else:
                 color = (*self.color, self.alpha)
-            shader.uniform_float('color', color)
+            shader.uniform_float("color", color)
             shape.glenable()
 
         shape.uniform_region(ctx)
@@ -139,31 +257,32 @@ class CustomGizmo():
         bgl.glDisable(bgl.GL_BLEND)
 
 
-class OffsetHandle():
+class OffsetHandle:
     """Handling mouse to offset gizmo from base along Z axis"""
+
     # FIXME: works a bit weird for rotated objects
 
     def invoke(self, ctx, event):
-        self.init_value = self.target_get_value('offset') / self.scale_value
+        self.init_value = self.target_get_value("offset") / self.scale_value
         coordz = self.project_mouse(ctx, event)
         if coordz is None:
-            return {'CANCELLED'}
+            return {"CANCELLED"}
         self.init_coordz = coordz
-        return {'RUNNING_MODAL'}
+        return {"RUNNING_MODAL"}
 
     def modal(self, ctx, event, tweak):
         coordz = self.project_mouse(ctx, event)
         if coordz is None:
-            return {'CANCELLED'}
+            return {"CANCELLED"}
         delta = coordz - self.init_coordz
-        if 'PRECISE' in tweak:
+        if "PRECISE" in tweak:
             delta /= 10.0
         value = max(0, self.init_value + delta)
         value *= self.scale_value
         # ctx.area.header_text_set(f"coords: {self.init_coordz} - {coordz}, delta: {delta}, value: {value}")
         ctx.area.header_text_set(f"Depth: {value}")
-        self.target_set_value('offset', value)
-        return {'RUNNING_MODAL'}
+        self.target_set_value("offset", value)
+        return {"RUNNING_MODAL"}
 
     def project_mouse(self, ctx, event):
         """Projecting mouse coords to local axis Z"""
@@ -189,30 +308,29 @@ class OffsetHandle():
 
     def exit(self, ctx, cancel):
         if cancel:
-            self.target_set_value('offset', self.init_value)
+            self.target_set_value("offset", self.init_value)
         else:
             self.group.update(ctx)
 
 
 class UglyDotGizmo(OffsetHandle, types.Gizmo):
     """three orthogonal circles"""
+
     bl_idname = "BIM_GT_uglydot_3d"
-    bl_target_properties = (
-        {'id': 'offset', 'type': 'FLOAT', 'array_length': 1},
-    )
+    bl_target_properties = ({"id": "offset", "type": "FLOAT", "array_length": 1},)
 
     __slots__ = (
-        'scale_value',
-        'custom_shape',
-        'init_value',
-        'init_coordz',
+        "scale_value",
+        "custom_shape",
+        "init_value",
+        "init_coordz",
     )
 
     def setup(self):
-        self.custom_shape = self.new_custom_shape(type='TRIS', verts=X3DISC)
+        self.custom_shape = self.new_custom_shape(type="TRIS", verts=X3DISC)
 
     def refresh(self):
-        offset = self.target_get_value('offset') / self.scale_value
+        offset = self.target_get_value("offset") / self.scale_value
         self.matrix_offset.col[3][2] = offset  # z-shift
 
     def draw(self, ctx):
@@ -226,15 +344,14 @@ class UglyDotGizmo(OffsetHandle, types.Gizmo):
 
 class DotGizmo(CustomGizmo, OffsetHandle, types.Gizmo):
     """Single dot viewport-aligned"""
+
     # FIXME: make it selectable
     bl_idname = "BIM_GT_dot_2d"
-    bl_target_properties = (
-        {'id': 'offset', 'type': 'FLOAT', 'array_length': 1},
-    )
+    bl_target_properties = ({"id": "offset", "type": "FLOAT", "array_length": 1},)
 
     __slots__ = (
-        'scale_value',
-        'custom_shape',
+        "scale_value",
+        "custom_shape",
     )
 
     def setup(self):
@@ -243,7 +360,7 @@ class DotGizmo(CustomGizmo, OffsetHandle, types.Gizmo):
         self.use_draw_scale = False
 
     def refresh(self):
-        offset = self.target_get_value('offset') / self.scale_value
+        offset = self.target_get_value("offset") / self.scale_value
         self.matrix_offset.col[3][2] = offset  # z-shifted
 
     def draw(self, ctx):
@@ -265,15 +382,11 @@ class ExtrusionGuidesGizmo(CustomGizmo, types.Gizmo):
     Noninteractive gizmo to indicate extrusion depth and planes.
     Draws main segment and orthogonal cross at endpoints.
     """
-    bl_idname = "BIM_GT_extrusion_guides"
-    bl_target_properties = (
-        {'id': 'depth', 'type': 'FLOAT', 'array_length': 1},
-    )
 
-    __slots__ = (
-        'scale_value',
-        'custom_shape'
-    )
+    bl_idname = "BIM_GT_extrusion_guides"
+    bl_target_properties = ({"id": "depth", "type": "FLOAT", "array_length": 1},)
+
+    __slots__ = ("scale_value", "custom_shape")
 
     def setup(self):
         shader = ExtrusionGuidesShader()
@@ -281,7 +394,7 @@ class ExtrusionGuidesGizmo(CustomGizmo, types.Gizmo):
         self.use_draw_scale = False
 
     def refresh(self):
-        depth = self.target_get_value('depth') / self.scale_value
+        depth = self.target_get_value("depth") / self.scale_value
         self.matrix_offset.col[2][2] = depth  # z-scaled
 
     def draw(self, ctx):
@@ -291,25 +404,22 @@ class ExtrusionGuidesGizmo(CustomGizmo, types.Gizmo):
 
 class DimensionLabelGizmo(types.Gizmo):
     """Text label for a dimension"""
+
     # does not work properly, fonts are totally screwed up
 
     bl_idname = "BIM_GT_dimension_label"
-    bl_target_properties = (
-        {'id': 'value', 'type': 'FLOAT', 'array_length': 1},
-    )
+    bl_target_properties = ({"id": "value", "type": "FLOAT", "array_length": 1},)
 
-    __slots__ = (
-        'text_label'
-    )
+    __slots__ = "text_label"
 
     def setup(self):
         pass
 
     def refresh(self, ctx):
-        value = self.target_get_value('value')
-        self.matrix_offset.col[3][2] = value * .5
+        value = self.target_get_value("value")
+        self.matrix_offset.col[3][2] = value * 0.5
         unit_system = ctx.scene.unit_settings.system
-        self.text_label = bpy.utils.units.to_string(unit_system, 'LENGTH', value, 3, split_unit=False)
+        self.text_label = bpy.utils.units.to_string(unit_system, "LENGTH", value, 3, split_unit=False)
 
     def draw(self, ctx):
         self.refresh(ctx)
@@ -337,41 +447,44 @@ class DimensionLabelGizmo(types.Gizmo):
 class ExtrusionWidget(types.GizmoGroup):
     bl_idname = "bim.extrusion_widget"
     bl_label = "Extrusion Gizmos"
-    bl_space_type = 'VIEW_3D'
-    bl_region_type = 'WINDOW'
-    bl_options = {'3D', 'PERSISTENT', 'SHOW_MODAL_ALL'}
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "WINDOW"
+    bl_options = {"3D", "PERSISTENT", "SHOW_MODAL_ALL"}
 
     # FIXME: use proper scale from ifc value to blender units
 
     @classmethod
     def poll(cls, ctx):
         obj = ctx.object
-        return (obj and obj.type == 'MESH'
-                and obj.data.BIMMeshProperties.ifc_parameters.get('IfcExtrudedAreaSolid/Depth') is not None)
+        return (
+            obj
+            and obj.type == "MESH"
+            and obj.data.BIMMeshProperties.ifc_parameters.get("IfcExtrudedAreaSolid/Depth") is not None
+        )
 
     def setup(self, ctx):
         target = ctx.object
-        prop = target.data.BIMMeshProperties.ifc_parameters.get('IfcExtrudedAreaSolid/Depth')
+        prop = target.data.BIMMeshProperties.ifc_parameters.get("IfcExtrudedAreaSolid/Depth")
 
         basis = target.matrix_world.normalized()
         theme = ctx.preferences.themes[0].user_interface
 
-        gz = self.handle = self.gizmos.new('BIM_GT_uglydot_3d')
+        gz = self.handle = self.gizmos.new("BIM_GT_uglydot_3d")
         gz.matrix_basis = basis
         gz.scale_basis = 0.1
         gz.color = gz.color_highlight = tuple(theme.gizmo_primary)
         gz.alpha = 0.5
         gz.alpha_highlight = 1.0
         gz.use_draw_modal = True
-        gz.target_set_prop('offset', prop, 'value')
+        gz.target_set_prop("offset", prop, "value")
         gz.scale_value = 1000
 
-        gz = self.guides = self.gizmos.new('BIM_GT_extrusion_guides')
+        gz = self.guides = self.gizmos.new("BIM_GT_extrusion_guides")
         gz.matrix_basis = basis
         gz.color = gz.color_highlight = tuple(theme.gizmo_secondary)
         gz.alpha = gz.alpha_highlight = 0.5
         gz.use_draw_modal = True
-        gz.target_set_prop('depth', prop, 'value')
+        gz.target_set_prop("depth", prop, "value")
         gz.scale_value = 1000
 
         # gz = self.label = self.gizmos.new('GIZMO_GT_dimension_label')
@@ -395,6 +508,6 @@ class ExtrusionWidget(types.GizmoGroup):
         # need to retrieve and rebind them again
         bpy.ops.bim.get_representation_ifc_parameters()
         target = ctx.object
-        prop = target.data.BIMMeshProperties.ifc_parameters.get('IfcExtrudedAreaSolid/Depth')
-        self.handle.target_set_prop('offset', prop, 'value')
-        self.guides.target_set_prop('depth', prop, 'value')
+        prop = target.data.BIMMeshProperties.ifc_parameters.get("IfcExtrudedAreaSolid/Depth")
+        self.handle.target_set_prop("offset", prop, "value")
+        self.guides.target_set_prop("depth", prop, "value")

src/blenderbim/blenderbim/bim/module/drawing/handler.py

@@ -0,0 +1,32 @@
+import bpy
+import blenderbim.bim.module.drawing.decoration as decoration
+from bpy.app.handlers import persistent
+
+
+@persistent
+def toggleDecorationsOnLoad(*args):
+    toggle = bpy.context.scene.DocProperties.should_draw_decorations
+    if toggle:
+        decoration.DecorationsHandler.install(bpy.context)
+    else:
+        decoration.DecorationsHandler.uninstall()
+
+
+@persistent
+def depsgraph_update_pre_handler(scene):
+    set_active_camera_resolution(scene)
+
+
+def set_active_camera_resolution(scene):
+    if not scene.camera or "/" not in scene.camera.name or not scene.DocProperties.drawings:
+        return
+    if (
+        scene.render.resolution_x != scene.camera.data.BIMCameraProperties.raster_x
+        or scene.render.resolution_y != scene.camera.data.BIMCameraProperties.raster_y
+    ):
+        scene.render.resolution_x = scene.camera.data.BIMCameraProperties.raster_x
+        scene.render.resolution_y = scene.camera.data.BIMCameraProperties.raster_y
+    current_drawing = scene.DocProperties.drawings[scene.DocProperties.current_drawing_index]
+    if scene.camera != current_drawing.camera:
+        scene.DocProperties.current_drawing_index = scene.DocProperties.drawings.find(scene.camera.name.split("/")[1])
+        bpy.ops.bim.activate_view(drawing_index=scene.DocProperties.current_drawing_index)

src/blenderbim/blenderbim/bim/module/drawing/helper.py

@@ -0,0 +1,360 @@
+import bpy
+import math
+import mathutils.geometry
+from mathutils import Vector
+
+# Code taken and updated from https://blenderartists.org/t/detecting-intersection-of-bounding-boxes/457520/2
+
+
+class BoundingEdge:
+    def __init__(self, v0, v1):
+        self.vertex = (v0, v1)
+        self.vector = v1 - v0
+
+
+class BoundingFace:
+    def __init__(self, v0, v1, v2):
+        self.vertex = (v0, v1, v2)
+        self.normal = mathutils.geometry.normal(v0, v1, v2)
+
+
+class BoundingBox:
+    def __init__(self, ob, vertex=None):
+        self.vertex = vertex or [ob.matrix_world @ Vector(v) for v in ob.bound_box]
+        if self.vertex != None:
+            self.edge = [
+                BoundingEdge(self.vertex[0], self.vertex[1]),
+                BoundingEdge(self.vertex[1], self.vertex[2]),
+                BoundingEdge(self.vertex[2], self.vertex[3]),
+                BoundingEdge(self.vertex[3], self.vertex[0]),
+                BoundingEdge(self.vertex[4], self.vertex[5]),
+                BoundingEdge(self.vertex[5], self.vertex[6]),
+                BoundingEdge(self.vertex[6], self.vertex[7]),
+                BoundingEdge(self.vertex[7], self.vertex[4]),
+                BoundingEdge(self.vertex[0], self.vertex[4]),
+                BoundingEdge(self.vertex[1], self.vertex[5]),
+                BoundingEdge(self.vertex[2], self.vertex[6]),
+                BoundingEdge(self.vertex[3], self.vertex[7]),
+            ]
+            self.face = [
+                BoundingFace(self.vertex[0], self.vertex[1], self.vertex[3]),
+                BoundingFace(self.vertex[0], self.vertex[4], self.vertex[1]),
+                BoundingFace(self.vertex[0], self.vertex[3], self.vertex[4]),
+                BoundingFace(self.vertex[6], self.vertex[5], self.vertex[7]),
+                BoundingFace(self.vertex[6], self.vertex[7], self.vertex[2]),
+                BoundingFace(self.vertex[6], self.vertex[2], self.vertex[5]),
+            ]
+
+    def whichSide(self, vtxs, normal, faceVtx):
+        retVal = 0
+        positive = 0
+        negative = 0
+        for v in vtxs:
+            t = normal.dot(v - faceVtx)
+            if t > 0:
+                positive = positive + 1
+            elif t < 0:
+                negative = negative + 1
+
+            if positive != 0 and negative != 0:
+                return 0
+
+        if positive != 0:
+            retVal = 1
+        else:
+            retVal = -1
+        return retVal
+
+    # Taken from: http://www.geometrictools.com/Documentation/MethodOfSeparatingAxes.pdf
+    def intersect(self, bb):
+        retVal = False
+        if self.vertex != None and bb.vertex != None:
+            # check all the faces of this object for a seperation axis
+            for i, f in enumerate(self.face):
+                d = f.normal
+                if self.whichSide(bb.vertex, d, f.vertex[0]) > 0:
+                    return False  # all the vertexes are on the +ve side of the face
+
+            # now do it again for the other objects faces
+            for i, f in enumerate(bb.face):
+                d = f.normal
+                if self.whichSide(self.vertex, d, f.vertex[0]) > 0:
+                    return False  # all the vertexes are on the +ve side of the face
+
+            # do edge checks
+            for e1 in self.edge:
+                for e2 in bb.edge:
+                    d = e1.vector.cross(e2.vector)
+                    side0 = self.whichSide(self.vertex, d, e1.vertex[0])
+                    if side0 == 0:
+                        continue
+                    side1 = self.whichSide(bb.vertex, d, e1.vertex[0])
+                    if side1 == 0:
+                        continue
+
+                    if (side0 * side1) < 0:
+                        return False
+
+            retVal = True
+        return retVal
+
+
+# This function stolen from https://github.com/kevancress/MeasureIt_ARCH/blob/dcf607ce0896aa2284463c6b4ae9cd023fc54cbe/measureit_arch_baseclass.py
+# MeasureIt-ARCH is GPL-v3
+# In the future I will need to rewrite this to allow the user to have custom
+# settings for each annotation object, not read from Blender.
+def format_distance(value, isArea=False, hide_units=True):
+    s_code = "\u00b2"  # Superscript two THIS IS LEGACY (but being kept for when Area Measurements are re-implimented)
+
+    # Get Scene Unit Settings
+    scaleFactor = bpy.context.scene.unit_settings.scale_length
+    unit_system = bpy.context.scene.unit_settings.system
+    unit_length = bpy.context.scene.unit_settings.length_unit
+
+    toInches = 39.3700787401574887
+    inPerFoot = 11.999
+
+    if isArea:
+        toInches = 1550
+        inPerFoot = 143.999
+
+    value *= scaleFactor
+
+    # Imperial Formating
+    if unit_system == "IMPERIAL":
+        precision = bpy.context.scene.BIMProperties.imperial_precision
+        if precision == "NONE":
+            precision = 256
+        elif precision == "1":
+            precision = 1
+        elif "/" in precision:
+            precision = int(precision.split("/")[1])
+
+        base = int(precision)
+        decInches = value * toInches
+
+        # Seperate ft and inches
+        # Unless Inches are the specified Length Unit
+        if unit_length != "INCHES":
+            feet = math.floor(decInches / inPerFoot)
+            decInches -= feet * inPerFoot
+        else:
+            feet = 0
+
+        # Seperate Fractional Inches
+        inches = math.floor(decInches)
+        if inches != 0:
+            frac = round(base * (decInches - inches))
+        else:
+            frac = round(base * (decInches))
+
+        # Set proper numerator and denominator
+        if frac != base:
+            numcycles = int(math.log2(base))
+            for i in range(numcycles):
+                if frac % 2 == 0:
+                    frac = int(frac / 2)
+                    base = int(base / 2)
+                else:
+                    break
+        else:
+            frac = 0
+            inches += 1
+
+        # Check values and compose string
+        if inches == 12:
+            feet += 1
+            inches = 0
+
+        if not isArea:
+            tx_dist = ""
+            if feet:
+                tx_dist += str(feet) + "'"
+            if feet and inches:
+                tx_dist += " - "
+            if inches:
+                tx_dist += str(inches)
+            if inches and frac:
+                tx_dist += " "
+            if frac:
+                tx_dist += str(frac) + "/" + str(base)
+            if inches or frac:
+                tx_dist += '"'
+        else:
+            tx_dist = str("%1.3f" % (value * toInches / inPerFoot)) + " sq. ft."
+
+    # METRIC FORMATING
+    elif unit_system == "METRIC":
+        precision = bpy.context.scene.BIMProperties.metric_precision
+        if precision != 0:
+            value = precision * round(float(value) / precision)
+
+        # Meters
+        if unit_length == "METERS":
+            fmt = "%1.3f"
+            if hide_units is False:
+                fmt += " m"
+            tx_dist = fmt % value
+        # Centimeters
+        elif unit_length == "CENTIMETERS":
+            fmt = "%1.1f"
+            if hide_units is False:
+                fmt += " cm"
+            d_cm = value * (100)
+            tx_dist = fmt % d_cm
+        # Millimeters
+        elif unit_length == "MILLIMETERS":
+            fmt = "%1.0f"
+            if hide_units is False:
+                fmt += " mm"
+            d_mm = value * (1000)
+            tx_dist = fmt % d_mm
+
+        # Otherwise Use Adaptive Units
+        else:
+            if round(value, 2) >= 1.0:
+                fmt = "%1.3f"
+                if hide_units is False:
+                    fmt += " m"
+                tx_dist = fmt % value
+            else:
+                if round(value, 2) >= 0.01:
+                    fmt = "%1.1f"
+                    if hide_units is False:
+                        fmt += " cm"
+                    d_cm = value * (100)
+                    tx_dist = fmt % d_cm
+                else:
+                    fmt = "%1.0f"
+                    if hide_units is False:
+                        fmt += " mm"
+                    d_mm = value * (1000)
+                    tx_dist = fmt % d_mm
+        if isArea:
+            tx_dist += s_code
+    else:
+        tx_dist = fmt % value
+
+    return tx_dist
+
+
+def get_active_drawing(scene):
+    """Get active drawing collection and camera"""
+    props = scene.DocProperties
+    if props.active_drawing_index is None or len(props.drawings) == 0:
+        return None, None
+    try:
+        drawing = props.drawings[props.active_drawing_index]
+        return scene.collection.children["Views"].children[f"IfcGroup/{drawing.name}"], drawing.camera
+    except (KeyError, IndexError):
+        raise RuntimeError("missing drawing collection")
+
+
+def get_project_collection(scene):
+    """Get main project collection"""
+
+    colls = [c for c in scene.collection.children if c.name.startswith("IfcProject")]
+    if len(colls) != 1:
+        raise RuntimeError("project collection missing or not unique")
+    return colls[0]
+
+
+def parse_diagram_scale(camera):
+    """Returns numeric value of scale"""
+    if camera.BIMCameraProperties.diagram_scale == "CUSTOM":
+        _, fraction = camera.BIMCameraProperties.custom_diagram_scale.split("|")
+    else:
+        _, fraction = camera.BIMCameraProperties.diagram_scale.split("|")
+    numerator, denominator = fraction.split("/")
+    return float(numerator) / float(denominator)
+
+
+def ortho_view_frame(camera, margin=0.015):
+    """Calculates 2d bounding box of camera view area.
+
+    Similar to `bpy.types.Camera.view_frame`
+
+    :arg camera: camera of drawing
+    :type camera: bpy.types.Camera + BIMCameraProperties
+    :arg margin: margins, in scene units
+    :type margin: float
+    :return: (xmin, xmax, ymin, ymax, zmin, zmax) in local camera coordinates
+    """
+    aspect = camera.BIMCameraProperties.raster_y / camera.BIMCameraProperties.raster_x
+    size = camera.ortho_scale
+    hwidth = size * 0.5
+    hheight = size * 0.5 * aspect
+    scale = parse_diagram_scale(camera)
+    xmarg = margin * scale
+    ymarg = margin * scale * aspect
+    return (-hwidth + xmarg, hwidth - xmarg, -hheight + ymarg, hheight - ymarg, -camera.clip_start, -camera.clip_end)
+
+
+def almost_zero(v):
+    return abs(v) < 1e-5
+
+
+def clip_segment(bounds, segm):
+    """Clipping line segment to bounds
+
+    :arg bounds: (xmin, xmax, ymin, ymax)
+    :arg segm: 2 vertices of the segment
+    :return: 2 new vertices of segment or None if segment outside the bounding box
+    """
+    # Liang–Barsky algorithm
+
+    xmin, xmax, ymin, ymax, _, _ = bounds
+    p1, p2 = segm
+
+    def clip_side(p, q):
+        if almost_zero(p):  # ~= 0, parallel to the side
+            if q < 0:
+                return None  # outside
+            else:
+                return 0, 1  # inside
+
+        t = q / p  # the intersection point
+
+        if p < 0:  # entering
+            return t, 1
+        else:  # leaving
+            return 0, t
+
+    dlt = p2 - p1
+
+    tt = (
+        clip_side(-dlt.x, p1.x - xmin),  # left
+        clip_side(+dlt.x, xmax - p1.x),  # right
+        clip_side(-dlt.y, p1.y - ymin),  # bottom
+        clip_side(+dlt.y, ymax - p1.y),  # top
+    )
+
+    if None in tt:
+        return None
+
+    t1 = max(0, max(t[0] for t in tt))
+    t2 = min(1, min(t[1] for t in tt))
+
+    if t1 >= t2:
+        return None
+
+    p1c = p1 + dlt * t1
+    p2c = p1 + dlt * t2
+
+    return p1c, p2c
+
+
+def elevate_segment(bounds, segm):
+    """Elevate line xy-perpendicular segment vertically
+
+    :arg bounds: (xmin, xmax, ymin, ymax)
+    :arg segm: 2 vertices of the segment
+    :return: 2 new vertices of segment or None if segment outside the bounding box
+    """
+    _, _, ymin, ymax, zmin, _ = bounds
+    p1, p2 = segm
+    dlt = p2 - p1
+    if not (almost_zero(dlt.x) and almost_zero(dlt.y)):
+        return None
+    x = p1.x
+    return [Vector((x, ymin, zmin)), Vector((x, ymax, zmin))]

src/blenderbim/blenderbim/bim/module/drawing/prop.py

@@ -0,0 +1,282 @@
+import os
+import bpy
+import blenderbim.bim.module.drawing.annotation as annotation
+import blenderbim.bim.module.drawing.decoration as decoration
+from pathlib import Path
+from blenderbim.bim.prop import Attribute, StrProperty
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+
+diagram_scales_enum = []
+titleblocks_enum = []
+sheets_enum = []
+vector_styles_enum = []
+
+
+def purge():
+    global diagram_scales_enum
+    global titleblocks_enum
+    global sheets_enum
+    global vector_styles_enum
+    diagram_scales_enum = []
+    titleblocks_enum = []
+    sheets_enum = []
+    vector_styles_enum = []
+
+
+def getDiagramScales(self, context):
+    global diagram_scales_enum
+    if (
+        len(diagram_scales_enum) < 1
+        or (bpy.context.scene.unit_settings.system == "IMPERIAL" and len(diagram_scales_enum) == 13)
+        or (bpy.context.scene.unit_settings.system == "METRIC" and len(diagram_scales_enum) == 31)
+    ):
+        if bpy.context.scene.unit_settings.system == "IMPERIAL":
+            diagram_scales_enum = [
+                ("CUSTOM", "Custom", ""),
+                ("1'=1'-0\"|1/1", "1'=1'-0\"", ""),
+                ('6"=1\'-0"|1/6', '6"=1\'-0"', ""),
+                ('1-1/2"=1\'-0"|1/8', '1-1/2"=1\'-0"', ""),
+                ('1"=1\'-0"|1/12', '1"=1\'-0"', ""),
+                ('3/4"=1\'-0"|1/16', '3/4"=1\'-0"', ""),
+                ('1/2"=1\'-0"|1/24', '1/2"=1\'-0"', ""),
+                ('3/8"=1\'-0"|1/32', '3/8"=1\'-0"', ""),
+                ('1/4"=1\'-0"|1/48', '1/4"=1\'-0"', ""),
+                ('3/16"=1\'-0"|1/64', '3/16"=1\'-0"', ""),
+                ('1/8"=1\'-0"|1/96', '1/8"=1\'-0"', ""),
+                ('3/32"=1\'-0"|1/128', '3/32"=1\'-0"', ""),
+                ('1/16"=1\'-0"|1/192', '1/16"=1\'-0"', ""),
+                ('1/32"=1\'-0"|1/384', '1/32"=1\'-0"', ""),
+                ('1/64"=1\'-0"|1/768', '1/64"=1\'-0"', ""),
+                ('1/128"=1\'-0"|1/1536', '1/128"=1\'-0"', ""),
+                ("1\"=10'|1/120", "1\"=10'", ""),
+                ("1\"=20'|1/240", "1\"=20'", ""),
+                ("1\"=30'|1/360", "1\"=30'", ""),
+                ("1\"=40'|1/480", "1\"=40'", ""),
+                ("1\"=50'|1/600", "1\"=50'", ""),
+                ("1\"=60'|1/720", "1\"=60'", ""),
+                ("1\"=70'|1/840", "1\"=70'", ""),
+                ("1\"=80'|1/960", "1\"=80'", ""),
+                ("1\"=90'|1/1080", "1\"=90'", ""),
+                ("1\"=100'|1/1200", "1\"=100'", ""),
+                ("1\"=150'|1/1800", "1\"=150'", ""),
+                ("1\"=200'|1/2400", "1\"=200'", ""),
+                ("1\"=300'|1/3600", "1\"=300'", ""),
+                ("1\"=400'|1/4800", "1\"=400'", ""),
+                ("1\"=500'|1/6000", "1\"=500'", ""),
+            ]
+        else:
+            diagram_scales_enum = [
+                ("CUSTOM", "Custom", ""),
+                ("1:5000|1/5000", "1:5000", ""),
+                ("1:2000|1/2000", "1:2000", ""),
+                ("1:1000|1/1000", "1:1000", ""),
+                ("1:500|1/500", "1:500", ""),
+                ("1:200|1/200", "1:200", ""),
+                ("1:100|1/100", "1:100", ""),
+                ("1:50|1/50", "1:50", ""),
+                ("1:20|1/20", "1:20", ""),
+                ("1:10|1/10", "1:10", ""),
+                ("1:5|1/5", "1:5", ""),
+                ("1:2|1/2", "1:2", ""),
+                ("1:1|1/1", "1:1", ""),
+            ]
+    return diagram_scales_enum
+
+
+def updateDrawingName(self, context):
+    if not self.camera:
+        return
+    if self.camera.name == self.name:
+        return
+    self.camera.name = "IfcAnnotation/{}".format(self.name)
+    unique_name = "/".join(self.camera.name.split("/")[1:])
+    self.camera.users_collection[0].name = "IfcGroup/{}".format(unique_name)
+    if self.name != unique_name:
+        self.name = unique_name
+
+
+def refreshActiveDrawingIndex(self, context):
+    bpy.ops.bim.activate_view(drawing_index=context.scene.DocProperties.active_drawing_index)
+
+
+def getTitleblocks(self, context):
+    global titleblocks_enum
+    if len(titleblocks_enum) < 1:
+        titleblocks_enum.clear()
+        for filename in Path(os.path.join(context.scene.BIMProperties.data_dir, "templates", "titleblocks")).glob(
+            "*.svg"
+        ):
+            f = str(filename.stem)
+            titleblocks_enum.append((f, f, ""))
+    return titleblocks_enum
+
+
+def refreshTitleblocks(self, context):
+    global titleblocks_enum
+    titleblocks_enum.clear()
+    getTitleblocks(self, context)
+
+
+def toggleDecorations(self, context):
+    toggle = self.should_draw_decorations
+    if toggle:
+        decoration.DecorationsHandler.install(context)
+    else:
+        decoration.DecorationsHandler.uninstall()
+
+
+def getVectorStyles(self, context):
+    global vector_styles_enum
+    if len(vector_styles_enum) < 1:
+        sheets_enum.clear()
+        for filename in Path(os.path.join(context.scene.BIMProperties.data_dir, "styles")).glob("*.css"):
+            f = str(filename.stem)
+            vector_styles_enum.append((f, f, ""))
+    return vector_styles_enum
+
+
+def refreshFontSize(self, context):
+    annotation.Annotator.resize_text(context.active_object)
+
+
+class Variable(PropertyGroup):
+    name: StringProperty(name="Name")
+    prop_key: StringProperty(name="Property Key")
+
+
+class Drawing(PropertyGroup):
+    name: StringProperty(name="Name", update=updateDrawingName)
+    camera: PointerProperty(name="Camera", type=bpy.types.Object)
+
+
+class Schedule(PropertyGroup):
+    name: StringProperty(name="Name")
+    file: StringProperty(name="File")
+
+
+class Sheet(PropertyGroup):
+    def set_name(self, new):
+        old = self.get("name")
+        path = os.path.join(bpy.context.scene.BIMProperties.data_dir, "sheets")
+        if old and os.path.isfile(os.path.join(path, old + ".svg")):
+            os.rename(os.path.join(path, old + ".svg"), os.path.join(path, new + ".svg"))
+        self["name"] = new
+
+    def get_name(self):
+        return self.get("name")
+
+    name: StringProperty(name="Name", get=get_name, set=set_name)
+    drawings: CollectionProperty(name="Drawings", type=Drawing)
+    active_drawing_index: IntProperty(name="Active Drawing Index")
+
+
+class DrawingStyle(PropertyGroup):
+    name: StringProperty(name="Name")
+    raster_style: StringProperty(name="Raster Style")
+    render_type: EnumProperty(
+        items=[
+            ("NONE", "None", ""),
+            ("DEFAULT", "Default", ""),
+            ("VIEWPORT", "Viewport", ""),
+        ],
+        name="Render Type",
+        default="VIEWPORT",
+    )
+    vector_style: EnumProperty(items=getVectorStyles, name="Vector Style")
+    include_query: StringProperty(name="Include Query")
+    exclude_query: StringProperty(name="Exclude Query")
+    attributes: CollectionProperty(name="Attributes", type=StrProperty)
+
+
+class DocProperties(PropertyGroup):
+    has_underlay: BoolProperty(name="Underlay", default=False)
+    has_linework: BoolProperty(name="Linework", default=True)
+    has_annotation: BoolProperty(name="Annotation", default=True)
+    should_use_underlay_cache: BoolProperty(name="Use Underlay Cache", default=False)
+    should_use_linework_cache: BoolProperty(name="Use Linework Cache", default=False)
+    should_use_annotation_cache: BoolProperty(name="Use Annotation Cache", default=False)
+    should_extract: BoolProperty(name="Should Extract", default=True)
+    drawings: CollectionProperty(name="Drawings", type=Drawing)
+    active_drawing_index: IntProperty(name="Active Drawing Index", update=refreshActiveDrawingIndex)
+    current_drawing_index: IntProperty(name="Current Drawing Index")
+    schedules: CollectionProperty(name="Schedules", type=Schedule)
+    active_schedule_index: IntProperty(name="Active Schedule Index")
+    titleblock: EnumProperty(items=getTitleblocks, name="Titleblock", update=refreshTitleblocks)
+    sheets: CollectionProperty(name="Sheets", type=Sheet)
+    active_sheet_index: IntProperty(name="Active Sheet Index")
+    ifc_files: CollectionProperty(name="IFCs", type=StrProperty)
+    drawing_styles: CollectionProperty(name="Drawing Styles", type=DrawingStyle)
+    should_draw_decorations: BoolProperty(name="Should Draw Decorations", update=toggleDecorations)
+    decorations_colour: FloatVectorProperty(
+        name="Decorations Colour", subtype="COLOR", default=(1, 0, 0, 1), min=0.0, max=1.0, size=4
+    )
+
+
+class BIMCameraProperties(PropertyGroup):
+    view_name: StringProperty(name="View Name")
+    target_view: EnumProperty(
+        items=[
+            ("PLAN_VIEW", "PLAN_VIEW", ""),
+            ("ELEVATION_VIEW", "ELEVATION_VIEW", ""),
+            ("SECTION_VIEW", "SECTION_VIEW", ""),
+            ("REFLECTED_PLAN_VIEW", "REFLECTED_PLAN_VIEW", ""),
+            ("MODEL_VIEW", "MODEL_VIEW", ""),
+        ],
+        name="Target View",
+        default="PLAN_VIEW",
+    )
+    diagram_scale: EnumProperty(items=getDiagramScales, name="Drawing Scale")
+    custom_diagram_scale: StringProperty(name="Custom Scale")
+    raster_x: IntProperty(name="Raster X", default=1000)
+    raster_y: IntProperty(name="Raster Y", default=1000)
+    is_nts: BoolProperty(name="Is NTS")
+    cut_objects: EnumProperty(
+        items=[
+            (
+                ".IfcWall|.IfcSlab|.IfcCurtainWall|.IfcStair|.IfcStairFlight|.IfcColumn|.IfcBeam|.IfcMember|.IfcCovering|.IfcSpace",
+                "Overall Plan / Section",
+                "",
+            ),
+            (".IfcElement", "Detail Drawing", ""),
+            ("CUSTOM", "Custom", ""),
+        ],
+        name="Cut Objects",
+    )
+    cut_objects_custom: StringProperty(name="Custom Cut")
+    active_drawing_style_index: IntProperty(name="Active Drawing Style Index")
+
+
+class BIMTextProperties(PropertyGroup):
+    font_size: EnumProperty(
+        items=[
+            ("1.8", "1.8 - Small", ""),
+            ("2.5", "2.5 - Regular", ""),
+            ("3.5", "3.5 - Large", ""),
+            ("5.0", "5.0 - Header", ""),
+            ("7.0", "7.0 - Title", ""),
+        ],
+        update=refreshFontSize,
+        name="Font Size",
+    )
+    symbol: EnumProperty(
+        items=[
+            ("None", "None", ""),
+            ("rectangle-tag", "Rectangle Tag", ""),
+            ("door-tag", "Door Tag", ""),
+        ],
+        update=refreshFontSize,
+        name="Symbol",
+    )
+    related_element: PointerProperty(name="Related Element", type=bpy.types.Object)
+    variables: CollectionProperty(name="Variables", type=Variable)

src/blenderbim/blenderbim/bim/module/drawing/shaders.py

@@ -1,10 +1,10 @@
-from mathutils import Matrix
 import bgl
+from mathutils import Matrix
 from gpu.types import GPUShader
 from gpu_extras.batch import batch_for_shader
 
 
-class BaseShader():
+class BaseShader:
     """Wrapepr for GPUShader
     To use for viewport decorations with geometry generated on GPU side.
 
@@ -85,14 +85,15 @@ class BaseShader():
 
     def __init__(self):
         # NB: libcode arg doesn't work
-        self.prog = GPUShader(vertexcode=self.VERT_GLSL,
-                              fragcode=self.FRAG_GLSL,
-                              geocode=self.LIB_GLSL + self.GEOM_GLSL,
-                              defines=self.DEF_GLSL)
+        self.prog = GPUShader(
+            vertexcode=self.VERT_GLSL,
+            fragcode=self.FRAG_GLSL,
+            geocode=self.LIB_GLSL + self.GEOM_GLSL,
+            defines=self.DEF_GLSL,
+        )
 
     def batch(self, indices=None, **data):
-        """Returns automatic GPUBatch filled with provided parameters
-        """
+        """Returns automatic GPUBatch filled with provided parameters"""
         batch = batch_for_shader(self.prog, self.TYPE, data, indices=indices)
         batch.program_set(self.prog)
         return batch
@@ -113,23 +114,26 @@ class BaseShader():
         region = ctx.region
         region3d = ctx.region_data
         try:
-            self.prog.uniform_float('viewMatrix', region3d.perspective_matrix)
+            self.prog.uniform_float("viewMatrix", region3d.perspective_matrix)
         except ValueError:  # unused uniform
             pass
         try:
-            self.prog.uniform_float('winSize', (region.width / 2, region.height / 2))
+            self.prog.uniform_float("winSize", (region.width / 2, region.height / 2))
         except ValueError:  # unused uniform
             pass
 
 
 class BaseLinesShader(BaseShader):
-    """Draws line segments with gaps around vertices at endpoints
-    """
-    TYPE = 'LINES'
+    """Draws line segments with gaps around vertices at endpoints"""
 
-    DEF_GLSL = BaseShader.DEF_GLSL + """
+    TYPE = "LINES"
+
+    DEF_GLSL = (
+        BaseShader.DEF_GLSL
+        + """
     #define GAP_SIZE {gap_size}
     """
+    )
 
     GEOM_GLSL = """
     layout(lines) in;
@@ -171,6 +175,7 @@ class GizmoShader(BaseShader):
 
     Scaling to match viewport is partially controlled by user preferences and gizmo code.
     """
+
     # TODO: add some magic to respect gizmo settings/params
 
     VERT_GLSL = """
@@ -187,12 +192,15 @@ class GizmoShader(BaseShader):
 class DotsGizmoShader(GizmoShader):
     """Draws circles of radius 1 around points"""
 
-    TYPE = 'POINTS'
+    TYPE = "POINTS"
 
-    DEF_GLSL = BaseShader.DEF_GLSL + """
+    DEF_GLSL = (
+        BaseShader.DEF_GLSL
+        + """
     #define CIRCLE_SEGMENTS 12
     #define CIRCLE_RADIUS 8
     """
+    )
 
     GEOM_GLSL = """
     layout(points) in;
@@ -235,11 +243,14 @@ class DotsGizmoShader(GizmoShader):
 class ExtrusionGuidesShader(GizmoShader):
     """Draws lines and add cross in XY plane at endpoints"""
 
-    TYPE = 'LINES'
+    TYPE = "LINES"
 
-    DEF_GLSL = BaseShader.DEF_GLSL + """
+    DEF_GLSL = (
+        BaseShader.DEF_GLSL
+        + """
     #define CROSS_SIZE .5
     """
+    )
 
     GEOM_GLSL = """
     uniform mat4 ModelViewProjectionMatrix;

src/blenderbim/blenderbim/bim/module/drawing/sheeter.py

@@ -13,7 +13,7 @@ class SheetBuilder:
         self.scale = "NTS"
 
     def create(self, name, titleblock_name):
-        sheet_path = "{}sheets/{}.svg".format(self.data_dir, name)
+        sheet_path = os.path.join(self.data_dir, f"{name}.svg")
         root = ET.Element("svg")
         root.attrib["xmlns"] = "http://www.w3.org/2000/svg"
         root.attrib["xmlns:xlink"] = "http://www.w3.org/1999/xlink"
@@ -121,9 +121,9 @@ class SheetBuilder:
         title.attrib["height"] = str(self.convert_to_mm(title_root.attrib.get("height")))
 
     def build(self, sheet_name):
-        os.makedirs("{}build/{}/".format(self.data_dir, sheet_name), exist_ok=True)
+        os.makedirs(os.path.join(self.data_dir, "build", sheet_name), exist_ok=True)
 
-        sheet_path = "{}sheets/{}.svg".format(self.data_dir, sheet_name)
+        sheet_path = os.path.join(self.data_dir, "sheets", f"{sheet_name}.svg")
 
         ET.register_namespace("", "http://www.w3.org/2000/svg")
         ET.register_namespace("xlink", "http://www.w3.org/1999/xlink")
@@ -140,7 +140,7 @@ class SheetBuilder:
         self.build_drawings(root.findall('{http://www.w3.org/2000/svg}g[@data-type="drawing"]'), sheet_name)
         self.build_schedules(root.findall('{http://www.w3.org/2000/svg}g[@data-type="schedule"]'))
 
-        with open("{}build/{}/{}.svg".format(self.data_dir, sheet_name, sheet_name), "wb") as output:
+        with open(os.path.join(self.data_dir, "build", sheet_name, f"{sheet_name}.svg"), "wb") as output:
             tree.write(output)
 
     def build_drawings(self, drawings, sheet_name):
@@ -155,8 +155,9 @@ class SheetBuilder:
             view.append(self.parse_embedded_svg(foreground, {}))
 
             # Add background
-            background_path = "{}sheets/{}".format(self.data_dir, self.get_href(background))
-            copy(background_path, "{}build/{}/".format(self.data_dir, sheet_name))
+            background_path = os.path.join(self.data_dir, "sheets", self.get_href(background))
+
+            copy(background_path, os.path.join(self.data_dir, "build", sheet_name))
 
             # Add view title
             foreground_path = self.get_href(foreground)
@@ -202,7 +203,7 @@ class SheetBuilder:
             self.convert_to_mm(image.attrib.get("x")), self.convert_to_mm(image.attrib.get("y"))
         )
         svg_path = self.get_href(image)
-        with open("{}sheets/{}".format(self.data_dir, svg_path), "r") as template:
+        with open(os.path.join(self.data_dir, "sheets", svg_path), "r") as template:
             embedded = ET.fromstring(pystache.render(template.read(), data))
             # viewBox should not be nested
             embedded.attrib["viewBox"] = ""

src/blenderbim/blenderbim/bim/module/drawing/svgwriter.py

@@ -6,8 +6,8 @@ import pystache
 import xml.etree.ElementTree as ET
 import svgwrite
 import ifcopenshell
-from . import annotation
-from . import helper
+import blenderbim.bim.module.drawing.helper as helper
+import blenderbim.bim.module.drawing.annotation as annotation
 from mathutils import Vector
 from mathutils import geometry
 from blenderbim.bim.ifc import IfcStore
@@ -39,14 +39,17 @@ class External(svgwrite.container.Group):
 
 
 class SvgWriter:
-    def __init__(self, ifc_cutter):
-        self.ifc_cutter = ifc_cutter
+    def __init__(self):
+        self.output = "out.svg"
+        self.data_dir = None
+        self.vector_style = None
         self.human_scale = "NTS"
+        self.annotations = {}
+        self.background_image = None
         self.scale = 1 / 100  # 1:100
 
-    def write(self):
+    def write(self, layer):
         self.calculate_scale()
-        self.output = os.path.join(self.ifc_cutter.data_dir, "diagrams", self.ifc_cutter.diagram_name + ".svg")
         self.svg = svgwrite.Drawing(
             self.output,
             debug=False,
@@ -56,41 +59,43 @@ class SvgWriter:
             data_scale=self.human_scale,
         )
 
-        self.add_stylesheet()
-        self.add_markers()
-        self.add_symbols()
-        self.add_patterns()
-        self.draw_background_image()
-        self.draw_background_elements()
-        self.draw_cut_polygons()
-        self.draw_annotations()
+        if layer == "underlay":
+            self.draw_background_image()
+        elif layer == "annotation":
+            self.add_stylesheet()
+            self.add_markers()
+            self.add_symbols()
+            self.add_patterns()
+            # self.draw_background_elements()
+            # self.draw_cut_polygons()
+            self.draw_annotations()
         self.svg.save(pretty=True)
 
     def calculate_scale(self):
         self.scale *= 1000  # IFC is in meters, SVG is in mm
-        self.raw_width = self.ifc_cutter.section_box["x"]
-        self.raw_height = self.ifc_cutter.section_box["y"]
+        self.raw_width = self.camera_width
+        self.raw_height = self.camera_height
         self.width = self.raw_width * self.scale
         self.height = self.raw_height * self.scale
 
     def add_stylesheet(self):
-        with open("{}styles/{}.css".format(self.ifc_cutter.data_dir, self.ifc_cutter.vector_style), "r") as stylesheet:
+        with open(os.path.join(self.data_dir, "styles", f"{self.vector_style}.css"), "r") as stylesheet:
             self.svg.defs.add(self.svg.style(stylesheet.read()))
 
     def add_markers(self):
-        tree = ET.parse("{}templates/markers.svg".format(self.ifc_cutter.data_dir))
+        tree = ET.parse(os.path.join(self.data_dir, "templates", "markers.svg"))
         root = tree.getroot()
         for child in root.getchildren():
             self.svg.defs.add(External(child))
 
     def add_symbols(self):
-        tree = ET.parse("{}templates/symbols.svg".format(self.ifc_cutter.data_dir))
+        tree = ET.parse(os.path.join(self.data_dir, "templates", "symbols.svg"))
         root = tree.getroot()
         for child in root.getchildren():
             self.svg.defs.add(External(child))
 
     def add_patterns(self):
-        tree = ET.parse("{}templates/patterns.svg".format(self.ifc_cutter.data_dir))
+        tree = ET.parse(os.path.join(self.data_dir, "templates", "patterns.svg"))
         root = tree.getroot()
         for child in root.getchildren():
             self.svg.defs.add(External(child))
@@ -98,12 +103,13 @@ class SvgWriter:
     def draw_background_image(self):
         self.svg.add(
             self.svg.image(
-                os.path.join("..", "diagrams", os.path.basename(self.ifc_cutter.background_image)),
+                os.path.join("..", "diagrams", os.path.basename(self.background_image)),
                 **{"width": self.width, "height": self.height}
             )
         )
 
     def draw_background_elements(self):
+        return # TODO purge?
         for element in self.ifc_cutter.background_elements:
             if element["type"] == "polygon":
                 self.draw_polygon(element, "background")
@@ -116,16 +122,16 @@ class SvgWriter:
         x_offset = self.raw_width / 2
         y_offset = self.raw_height / 2
 
-        for obj in self.ifc_cutter.equal_objs:
+        for obj in self.annotations.get("equal_objs", []):
             self.draw_dimension_annotations(obj, text_override="EQ")
-        for obj in self.ifc_cutter.dimension_objs:
+        for obj in self.annotations.get("dimension_objs", []):
             self.draw_dimension_annotations(obj)
         self.draw_measureit_arch_dimension_annotations()
 
-        if self.ifc_cutter.break_obj:
-            self.draw_break_annotations(self.ifc_cutter.break_obj)
+        if self.annotations.get("break_obj"):
+            self.draw_break_annotations(self.annotations["break_obj"])
 
-        for grid_obj in self.ifc_cutter.grid_objs:
+        for grid_obj in self.annotations.get("grid_objs", []):
             matrix_world = grid_obj.matrix_world
             for edge in grid_obj.data.edges:
                 classes = ["annotation", "grid"]
@@ -174,21 +180,21 @@ class SvgWriter:
 
         self.draw_ifc_annotation()
 
-        for obj in self.ifc_cutter.misc_objs:
+        for obj in self.annotations.get("misc_objs", []):
             self.draw_misc_annotation(obj, ["IfcAnnotation"])
 
-        for obj_data in self.ifc_cutter.hidden_objs:
+        for obj_data in self.annotations.get("hidden_objs", []):
             self.draw_line_annotation(obj_data, ["hidden"])
 
-        for obj_data in self.ifc_cutter.solid_objs:
+        for obj_data in self.annotations.get("solid_objs", []):
             self.draw_line_annotation(obj_data, ["solid"])
 
-        if self.ifc_cutter.leader_obj:
-            self.draw_line_annotation(self.ifc_cutter.leader_obj, ["leader"])
+        if self.annotations.get("leader_obj"):
+            self.draw_line_annotation(self.annotations["leader_obj"], ["leader"])
 
-        if self.ifc_cutter.plan_level_obj:
-            matrix_world = self.ifc_cutter.plan_level_obj.matrix_world
-            for spline in self.ifc_cutter.plan_level_obj.data.splines:
+        if self.annotations.get("plan_level_obj"):
+            matrix_world = self.annotations["plan_level_obj"].matrix_world
+            for spline in self.annotations["plan_level_obj"].data.splines:
                 classes = ["annotation", "plan-level"]
                 points = self.get_spline_points(spline)
                 projected_points = [self.project_point_onto_camera(matrix_world @ p.co.xyz) for p in points]
@@ -208,7 +214,7 @@ class SvgWriter:
                     )
                 )
                 # TODO: allow metric to be configurable
-                rl = ((matrix_world @ points[0].co).xyz + self.ifc_cutter.plan_level_obj.location).z
+                rl = ((matrix_world @ points[0].co).xyz + self.annotations["plan_level_obj"].location).z
                 if bpy.context.scene.unit_settings.system == "IMPERIAL":
                     rl = helper.format_distance(rl)
                 else:
@@ -231,9 +237,9 @@ class SvgWriter:
                     )
                 )
 
-        if self.ifc_cutter.section_level_obj:
-            matrix_world = self.ifc_cutter.section_level_obj.matrix_world
-            for spline in self.ifc_cutter.section_level_obj.data.splines:
+        if self.annotations.get("section_level_obj"):
+            matrix_world = self.annotations["section_level_obj"].matrix_world
+            for spline in self.annotations["section_level_obj"].data.splines:
                 classes = ["annotation", "section-level"]
                 points = self.get_spline_points(spline)
                 projected_points = [self.project_point_onto_camera(matrix_world @ p.co.xyz) for p in points]
@@ -273,9 +279,9 @@ class SvgWriter:
                     )
                 )
 
-        if self.ifc_cutter.stair_obj:
-            matrix_world = self.ifc_cutter.stair_obj.matrix_world
-            for spline in self.ifc_cutter.stair_obj.data.splines:
+        if self.annotations.get("stair_obj"):
+            matrix_world = self.annotations["stair_obj"].matrix_world
+            for spline in self.annotations["stair_obj"].data.splines:
                 classes = ["annotation", "stair"]
                 points = self.get_spline_points(spline)
                 projected_points = [self.project_point_onto_camera(matrix_world @ p.co.xyz) for p in points]
@@ -308,7 +314,7 @@ class SvgWriter:
     def draw_ifc_annotation(self):
         x_offset = self.raw_width / 2
         y_offset = self.raw_height / 2
-        for annotation in self.ifc_cutter.annotation_objs:
+        for annotation in self.annotations.get("annotation_objs", []):
             for edge in annotation["edges"]:
                 v0_global = annotation["vertices"][edge[0]]
                 v1_global = annotation["vertices"][edge[1]]
@@ -357,7 +363,7 @@ class SvgWriter:
                 classes.append("material-{}".format(re.sub("[^0-9a-zA-Z]+", "", slot.material.name)))
         global_id = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id).GlobalId
         classes.append("globalid-{}".format(global_id))
-        for attribute in self.ifc_cutter.attributes:
+        for attribute in self.annotations.get("attributes", []):
             result = self.get_obj_value(obj, attribute)
             if result:
                 classes.append(
@@ -435,7 +441,7 @@ class SvgWriter:
         x_offset = self.raw_width / 2
         y_offset = self.raw_height / 2
 
-        for text_obj in self.ifc_cutter.text_objs:
+        for text_obj in self.annotations.get("text_objs", []):
             text_position = self.project_point_onto_camera(text_obj.location)
             text_position = Vector(((x_offset + text_position.x), (y_offset - text_position.y)))
 
@@ -473,8 +479,8 @@ class SvgWriter:
                 alignment_baseline = "baseline"
 
             text_body = text_obj.data.body
-            if text_obj.name in self.ifc_cutter.template_variables:
-                text_body = pystache.render(text_body, self.ifc_cutter.template_variables[text_obj.name])
+            if text_obj.name in self.annotations.get("template_variables", {}):
+                text_body = pystache.render(text_body, self.annotations["template_variables"][text_obj.name])
 
             for line_number, text_line in enumerate(text_body.split("\n")):
                 self.svg.add(
@@ -587,17 +593,18 @@ class SvgWriter:
         )
 
     def project_point_onto_camera(self, point):
-        return self.ifc_cutter.camera_obj.matrix_world.inverted() @ geometry.intersect_line_plane(
+        return self.camera.matrix_world.inverted() @ geometry.intersect_line_plane(
             point.xyz,
-            point.xyz - Vector(self.ifc_cutter.section_box["projection"]),
-            self.ifc_cutter.camera_obj.location,
-            Vector(self.ifc_cutter.section_box["projection"]),
+            point.xyz - Vector(self.camera_projection),
+            self.camera.location,
+            Vector(self.camera_projection),
         )
 
     def get_spline_points(self, spline):
         return spline.bezier_points if spline.bezier_points else spline.points
 
     def draw_cut_polygons(self):
+        return # deprecate?
         for polygon in self.ifc_cutter.cut_polygons:
             self.draw_polygon(polygon, "cut")
 

src/blenderbim/blenderbim/bim/module/drawing/ui.py

@@ -27,12 +27,17 @@ class BIM_PT_camera(Panel):
         dprops = bpy.context.scene.DocProperties
         props = context.active_object.data.BIMCameraProperties
 
-        layout.label(text="Generation Options:")
+        col = layout.column(align=True)
+        row = col.row(align=True)
+        row.prop(dprops, "has_underlay", icon="OUTLINER_OB_IMAGE")
+        row.prop(dprops, "should_use_underlay_cache", text="", icon="FILE_REFRESH")
+        row = col.row(align=True)
+        row.prop(dprops, "has_linework", icon="IMAGE_DATA")
+        row.prop(dprops, "should_use_linework_cache", text="", icon="FILE_REFRESH")
+        row = col.row(align=True)
+        row.prop(dprops, "has_annotation", icon="MOD_EDGESPLIT")
+        row.prop(dprops, "should_use_annotation_cache", text="", icon="FILE_REFRESH")
 
-        row = layout.row()
-        row.prop(dprops, "should_recut")
-        row = layout.row()
-        row.prop(dprops, "should_recut_selected")
         row = layout.row()
         row.prop(dprops, "should_extract")
 
@@ -64,7 +69,31 @@ class BIM_PT_camera(Panel):
             row = layout.row()
             row.prop(props, "custom_diagram_scale")
 
-        layout.label(text="Drawing Styles:")
+        row = layout.row(align=True)
+        row.operator("bim.create_drawing", text="Create Drawing", icon="OUTPUT")
+        op = row.operator("bim.open_view", icon="URL", text="")
+        op.view = context.active_object.name.split("/")[1]
+
+
+class BIM_PT_drawing_underlay(Panel):
+    bl_label = "Drawing Underlay"
+    bl_idname = "BIM_PT_drawing_underlay"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "data"
+    bl_parent_id = "BIM_PT_camera"
+
+    @classmethod
+    def poll(cls, context):
+        engine = context.engine
+        return context.camera and hasattr(context.active_object.data, "BIMCameraProperties")
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        dprops = bpy.context.scene.DocProperties
+        props = context.active_object.data.BIMCameraProperties
 
         row = layout.row(align=True)
         row.operator("bim.add_drawing_style")
@@ -101,8 +130,214 @@ class BIM_PT_camera(Panel):
                 row.operator("bim.save_drawing_style")
                 row.operator("bim.activate_drawing_style")
 
+
+
+class BIM_PT_drawings(Panel):
+    bl_label = "SVG Drawings"
+    bl_idname = "BIM_PT_drawings"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "output"
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        props = bpy.context.scene.DocProperties
+
         row = layout.row(align=True)
-        row.operator("bim.cut_section", text="Create Drawing")
-        row.operator("bim.create_drawing", text="Create Drawing 2.0")
-        op = row.operator("bim.open_view", icon="URL", text="")
-        op.view = context.active_object.name.split("/")[1]
+        row.operator("bim.add_drawing")
+        row.operator("bim.refresh_drawing_list", icon="FILE_REFRESH", text="")
+
+        if props.drawings:
+            if props.active_drawing_index < len(props.drawings):
+                op = row.operator("bim.open_view", icon="URL", text="")
+                op.view = props.drawings[props.active_drawing_index].name
+                row.operator("bim.remove_drawing", icon="X", text="").index = props.active_drawing_index
+            layout.template_list("BIM_UL_generic", "", props, "drawings", props, "active_drawing_index")
+
+        row = layout.row()
+        row.operator("bim.add_ifc_file")
+
+        for index, ifc_file in enumerate(props.ifc_files):
+            row = layout.row(align=True)
+            row.prop(ifc_file, "name", text="IFC #{}".format(index + 1))
+            row.operator("bim.select_doc_ifc_file", icon="FILE_FOLDER", text="").index = index
+            row.operator("bim.remove_ifc_file", icon="X", text="").index = index
+
+
+class BIM_PT_schedules(Panel):
+    bl_label = "ODS Schedules"
+    bl_idname = "BIM_PT_schedules"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "output"
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        props = bpy.context.scene.DocProperties
+
+        row = layout.row(align=True)
+        row.operator("bim.add_schedule")
+
+        if props.schedules:
+            row.operator("bim.build_schedule", icon="LINENUMBERS_ON", text="")
+            row.operator("bim.remove_schedule", icon="X", text="").index = props.active_schedule_index
+
+            layout.template_list("BIM_UL_generic", "", props, "schedules", props, "active_schedule_index")
+
+            row = layout.row()
+            row.prop(props.schedules[props.active_schedule_index], "file")
+            row.operator("bim.select_schedule_file", icon="FILE_FOLDER", text="")
+
+
+class BIM_PT_sheets(Panel):
+    bl_label = "SVG Sheets"
+    bl_idname = "BIM_PT_sheets"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "output"
+
+    def draw(self, context):
+        layout = self.layout
+        props = bpy.context.scene.DocProperties
+
+        row = layout.row(align=True)
+        row.prop(props, "titleblock", text="")
+        row.operator("bim.add_sheet")
+
+        if props.sheets:
+            row.operator("bim.open_sheet", icon="URL", text="")
+            row.operator("bim.remove_sheet", icon="X", text="").index = props.active_sheet_index
+
+            layout.template_list("BIM_UL_generic", "", props, "sheets", props, "active_sheet_index")
+
+        row = layout.row(align=True)
+        row.operator("bim.add_drawing_to_sheet")
+        row.operator("bim.add_schedule_to_sheet")
+        row = layout.row()
+        row.operator("bim.create_sheets")
+
+
+class BIM_PT_text(Panel):
+    bl_label = "Text Paper Space"
+    bl_idname = "BIM_PT_text"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "data"
+
+    @classmethod
+    def poll(cls, context):
+        return type(context.curve) is bpy.types.TextCurve
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        props = context.active_object.data.BIMTextProperties
+
+        row = layout.row()
+        row.operator("bim.propagate_text_data")
+
+        row = layout.row()
+        row.prop(props, "font_size")
+        row = layout.row()
+        row.prop(props, "symbol")
+        row = layout.row()
+        row.prop(props, "related_element")
+
+        row = layout.row()
+        row.operator("bim.add_variable")
+
+        for index, variable in enumerate(props.variables):
+            row = layout.row(align=True)
+            row.prop(variable, "name")
+            row.operator("bim.remove_variable", icon="X", text="").index = index
+            row = layout.row()
+            row.prop(variable, "prop_key")
+
+
+class BIM_PT_annotation_utilities(Panel):
+    bl_idname = "BIM_PT_annotation_utilities"
+    bl_label = "Annotation"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+    bl_category = "BlenderBIM"
+
+    def draw(self, context):
+        layout = self.layout
+
+        row = layout.row(align=True)
+        row.operator("bim.clean_wireframes")
+        row = layout.row(align=True)
+        row.operator("bim.link_ifc")
+        row = layout.row(align=True)
+        row.operator("bim.add_grid")
+        row = layout.row(align=True)
+        row.operator("bim.add_sections_annotations")
+
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Dim", icon="ARROW_LEFTRIGHT")
+        op.obj_name = "Dimension"
+        op.data_type = "curve"
+        op = row.operator("bim.add_annotation", text="Dim (Eq)", icon="ARROW_LEFTRIGHT")
+        op.obj_name = "Equal"
+        op.data_type = "curve"
+
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Text", icon="SMALL_CAPS")
+        op.data_type = "text"
+        op = row.operator("bim.add_annotation", text="Leader", icon="TRACKING_BACKWARDS")
+        op.obj_name = "Leader"
+        op.data_type = "curve"
+
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Stair Arrow", icon="SCREEN_BACK")
+        op.obj_name = "Stair"
+        op.data_type = "curve"
+        op = row.operator("bim.add_annotation", text="Hidden", icon="CON_TRACKTO")
+        op.obj_name = "Hidden"
+        op.data_type = "mesh"
+
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Level (Plan)", icon="SORTBYEXT")
+        op.obj_name = "Plan Level"
+        op.data_type = "curve"
+        op = row.operator("bim.add_annotation", text="Level (Section)", icon="TRIA_DOWN")
+        op.obj_name = "Section Level"
+        op.data_type = "curve"
+
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Breakline", icon="FCURVE")
+        op.obj_name = "Break"
+        op.data_type = "mesh"
+        op = row.operator("bim.add_annotation", text="Misc", icon="MESH_MONKEY")
+        op.obj_name = "Misc"
+        op.data_type = "mesh"
+
+        props = bpy.context.scene.DocProperties
+
+        row = layout.row(align=True)
+        row.operator("bim.add_drawing")
+        row.operator("bim.refresh_drawing_list", icon="FILE_REFRESH", text="")
+
+        if props.drawings:
+            if props.active_drawing_index < len(props.drawings):
+                op = row.operator("bim.open_view", icon="URL", text="")
+                op.view = props.drawings[props.active_drawing_index].name
+                row.operator("bim.remove_drawing", icon="X", text="").index = props.active_drawing_index
+            layout.template_list("BIM_UL_drawinglist", "", props, "drawings", props, "active_drawing_index")
+
+        layout.prop(props, "should_draw_decorations")
+        layout.prop(props, "decorations_colour")
+
+
+class BIM_UL_drawinglist(bpy.types.UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            row = layout.row(align=True)
+            row.prop(item, "name", text="", emboss=False)
+            op = row.operator("bim.open_view_camera", icon="OUTLINER_OB_CAMERA", text="")
+            op.view_name = item.name
+        else:
+            layout.label(text="", translate=False)

src/blenderbim/blenderbim/bim/module/geometry/__init__.py

@@ -4,14 +4,13 @@ from . import ui, prop, operator
 classes = (
     operator.EditObjectPlacement,
     operator.AddRepresentation,
-    operator.MapRepresentations,
-    operator.MapRepresentation,
     operator.SwitchRepresentation,
     operator.RemoveRepresentation,
-    operator.UpdateMeshRepresentation,
+    operator.UpdateRepresentation,
     operator.UpdateParametricRepresentation,
     operator.GetRepresentationIfcParameters,
     prop.BIMGeometryProperties,
+    ui.BIM_PT_derived_placements,
     ui.BIM_PT_representations,
     ui.BIM_PT_mesh,
     ui.BIM_PT_workarounds,

src/blenderbim/blenderbim/bim/module/geometry/helper.py

@@ -1,5 +1,6 @@
 import bpy
 import bmesh
+import mathutils
 import ifcopenshell
 import ifcopenshell.util.unit
 from math import pi
@@ -197,19 +198,26 @@ class Helper:
         return {"profile": outer_loop, "inner_curves": inner_loops, "extrusion": extrusion}
 
     # An extrusion edge is an edge that shares a single vertex with a profile
-    # face and is not parallel to the face.
+    # face and is not on the plane of the face.
     def detect_extrusion_edge(self, bm, profile_face):
         bm.edges.ensure_lookup_table()
         extrusion = None
         face_verts_set = set(profile_face.verts)
         for edge in bm.edges:
-            edge_vector = edge.verts[1].co - edge.verts[0].co
             unshared_verts = set(edge.verts) - face_verts_set
-            angle_to_normal = edge_vector.angle(profile_face.normal)
-            if len(unshared_verts) == 1 and (angle_to_normal < 0.001 or angle_to_normal - pi < 0.001):
-                if unshared_verts.pop() == edge.verts[1]:
-                    return [edge.verts[0].index, edge.verts[1].index]
-                return [edge.verts[1].index, edge.verts[0].index]
+            if len(unshared_verts) == 1:
+                unshared_vert = unshared_verts.pop()
+                if (
+                    abs(
+                        mathutils.geometry.distance_point_to_plane(
+                            unshared_vert.co, profile_face.verts[0].co, profile_face.normal
+                        )
+                    )
+                    > 0.001
+                ):
+                    if unshared_vert == edge.verts[1]:
+                        return [edge.verts[0].index, edge.verts[1].index]
+                    return [edge.verts[1].index, edge.verts[0].index]
 
     def create_extruded_area_solid(self, mesh, extrusion_indices, profile_def):
         position = self.create_ifc_axis_2_placement_3d(

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -3,6 +3,7 @@ import numpy as np
 import ifcopenshell
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
+import ifcopenshell.util.representation
 import logging
 import ifcopenshell.api
 from blenderbim.bim.ifc import IfcStore
@@ -13,20 +14,16 @@ from ifcopenshell.api.void.data import Data as VoidData
 from mathutils import Vector
 
 
-def get_context_id(context_type, context_identifier, target_view):
-    for context in ContextData.contexts.values():
-        if context["ContextType"] == context_type:
-            for i, subcontext in context["HasSubContexts"].items():
-                if subcontext["ContextIdentifier"] == context_identifier and subcontext["TargetView"] == target_view:
-                    return i
-
-
 class EditObjectPlacement(bpy.types.Operator):
     bl_idname = "bim.edit_object_placement"
     bl_label = "Edit Object Placement"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         objs = [bpy.data.objects.get(self.obj)] if self.obj else bpy.context.selected_objects
         self.file = IfcStore.get_file()
         # TODO: determine how to deal with this module dependency
@@ -62,124 +59,140 @@ class EditObjectPlacement(bpy.types.Operator):
 class AddRepresentation(bpy.types.Operator):
     bl_idname = "bim.add_representation"
     bl_label = "Add Representation"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     context_id: bpy.props.IntProperty()
+    ifc_representation_class: bpy.props.StringProperty()
+    profile_set_usage: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         self.file = IfcStore.get_file()
 
         bpy.ops.bim.edit_object_placement(obj=obj.name)
 
-        if obj.data:
-            product = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
-            context_id = self.context_id or int(bpy.context.scene.BIMProperties.contexts)
-            context_of_items = self.file.by_id(context_id)
+        if not obj.data:
+            return {"FINISHED"}
 
-            gprop = context.scene.BIMGeoreferenceProperties
-            coordinate_offset = None
-            if gprop.has_blender_offset and gprop.blender_offset_type == "CARTESIAN_POINT":
-                coordinate_offset = Vector(
-                    (
-                        float(gprop.blender_eastings),
-                        float(gprop.blender_northings),
-                        float(gprop.blender_orthogonal_height),
-                    )
+        product = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+
+        context_id = self.context_id or int(bpy.context.scene.BIMProperties.contexts)
+        context_of_items = self.file.by_id(context_id)
+
+        gprop = context.scene.BIMGeoreferenceProperties
+        coordinate_offset = None
+        if gprop.has_blender_offset and gprop.blender_offset_type == "CARTESIAN_POINT":
+            coordinate_offset = Vector(
+                (
+                    float(gprop.blender_eastings),
+                    float(gprop.blender_northings),
+                    float(gprop.blender_orthogonal_height),
                 )
-
-            representation_data = {
-                "context": context_of_items,
-                "blender_object": obj,
-                "geometry": obj.data,
-                "coordinate_offset": coordinate_offset,
-                "total_items": max(1, len(obj.material_slots)),
-                "should_force_faceted_brep": context.scene.BIMGeometryProperties.should_force_faceted_brep,
-                "should_force_triangulation": context.scene.BIMGeometryProperties.should_force_triangulation,
-            }
-
-            result = ifcopenshell.api.run("geometry.add_representation", self.file, **representation_data)
-
-            if not result:
-                print("Failed to write shape representation")
-                return {"FINISHED"}
-
-            box_context_id = get_context_id("Model", "Box", "MODEL_VIEW")
-            old_box = ifcopenshell.util.element.get_representation(product, "Model", "Box", "MODEL_VIEW")
-            if (
-                box_context_id
-                and context_of_items.ContextType == "Model"
-                and context_of_items.ContextIdentifier
-                and context_of_items.ContextIdentifier == "Body"
-            ):
-                if old_box:
-                    bpy.ops.bim.remove_representation(representation_id=old_box.id(), obj=obj.name)
-                representation_data["context"] = self.file.by_id(box_context_id)
-                new_box = ifcopenshell.api.run("geometry.add_representation", self.file, **representation_data)
-                ifcopenshell.api.run(
-                    "geometry.assign_representation", self.file, **{"product": product, "representation": new_box}
-                )
-
-            [
-                bpy.ops.bim.add_style(material=s.material.name)
-                for s in obj.material_slots
-                if s.material and not s.material.BIMMaterialProperties.ifc_style_id
-            ]
-
-            ifcopenshell.api.run(
-                "geometry.assign_styles",
-                self.file,
-                **{
-                    "shape_representation": result,
-                    "styles": [
-                        self.file.by_id(s.material.BIMMaterialProperties.ifc_style_id)
-                        for s in obj.material_slots
-                        if s.material
-                    ],
-                    "should_use_presentation_style_assignment": context.scene.BIMGeometryProperties.should_use_presentation_style_assignment,
-                },
-            )
-            ifcopenshell.api.run(
-                "geometry.assign_representation", self.file, **{"product": product, "representation": result}
             )
 
-            existing_mesh = obj.data
-            mesh = obj.data.copy()
-            mesh.name = "{}/{}".format(context_id, result.id())
-            mesh.BIMMeshProperties.ifc_definition_id = int(result.id())
-            obj.data = mesh
+        representation_data = {
+            "context": context_of_items,
+            "blender_object": obj,
+            "geometry": obj.data,
+            "coordinate_offset": coordinate_offset,
+            "total_items": max(1, len(obj.material_slots)),
+            "should_force_faceted_brep": context.scene.BIMGeometryProperties.should_force_faceted_brep,
+            "should_force_triangulation": context.scene.BIMGeometryProperties.should_force_triangulation,
+            "ifc_representation_class": self.ifc_representation_class,
+            "profile_set_usage": self.file.by_id(self.profile_set_usage) if self.profile_set_usage else None
+        }
+
+        result = ifcopenshell.api.run("geometry.add_representation", self.file, **representation_data)
+
+        if not result:
+            print("Failed to write shape representation")
+            return {"FINISHED"}
+
+        [
+            bpy.ops.bim.add_style(material=s.material.name)
+            for s in obj.material_slots
+            if s.material and not s.material.BIMMaterialProperties.ifc_style_id
+        ]
+
+        ifcopenshell.api.run(
+            "geometry.assign_styles",
+            self.file,
+            **{
+                "shape_representation": result,
+                "styles": [
+                    self.file.by_id(s.material.BIMMaterialProperties.ifc_style_id)
+                    for s in obj.material_slots
+                    if s.material
+                ],
+                "should_use_presentation_style_assignment": context.scene.BIMGeometryProperties.should_use_presentation_style_assignment,
+            },
+        )
+        ifcopenshell.api.run(
+            "geometry.assign_representation", self.file, **{"product": product, "representation": result}
+        )
+
+        existing_mesh = obj.data
+        mesh = obj.data.copy()
+        mesh.name = "{}/{}".format(context_id, result.id())
+        mesh.BIMMeshProperties.ifc_definition_id = int(result.id())
+        obj.data = mesh
         Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
+
+        if product.is_a("IfcTypeProduct"):
+            if self.file.schema == "IFC2X3":
+                types = product.ObjectTypeOf
+            else:
+                types = product.Types
+            if types:
+                for element in types[0].RelatedObjects:
+                    Data.load(IfcStore.get_file(), element.id())
         return {"FINISHED"}
 
 
 class SwitchRepresentation(bpy.types.Operator):
     bl_idname = "bim.switch_representation"
     bl_label = "Switch Representation"
+    bl_options = {"REGISTER", "UNDO"}
+    obj: bpy.props.StringProperty()
     ifc_definition_id: bpy.props.IntProperty()
+    should_reload: bpy.props.BoolProperty()
     disable_opening_subtractions: bpy.props.BoolProperty()
 
     def execute(self, context):
-        self.obj = bpy.context.active_object
-        self.oprops = self.obj.BIMObjectProperties
+        self.element_obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
+        self.oprops = self.element_obj.BIMObjectProperties
 
         self.file = IfcStore.get_file()
         self.context_of_items = self.file.by_id(self.ifc_definition_id).ContextOfItems
-        self.mesh_name = "{}/{}".format(self.context_of_items.id(), self.ifc_definition_id)
+        self.mesh_name = self.get_mesh_name()
 
         mesh = bpy.data.meshes.get(self.mesh_name)
         if mesh:
-            self.obj.data.user_remap(mesh)
-        self.pull_mesh_from_ifc()
+            self.element_obj.data.user_remap(mesh)
+        if not mesh or self.should_reload:
+            self.pull_mesh_from_ifc()
         return {"FINISHED"}
 
+    def get_mesh_name(self):
+        representation = self.resolve_mapped_representation(self.file.by_id(self.ifc_definition_id))
+        return "{}/{}".format(self.context_of_items.id(), representation.id())
+
+    def resolve_mapped_representation(self, representation):
+        if representation.RepresentationType == "MappedRepresentation":
+            return self.resolve_mapped_representation(representation.Items[0].MappingSource.MappedRepresentation)
+        return representation
+
     def pull_mesh_from_ifc(self):
-        self.file = IfcStore.get_file()
         logger = logging.getLogger("ImportIFC")
         ifc_import_settings = import_ifc.IfcImportSettings.factory(bpy.context, IfcStore.path, logger)
         element = self.file.by_id(self.oprops.ifc_definition_id)
         settings = ifcopenshell.geom.settings()
 
         if self.context_of_items.ContextIdentifier == "Body":
-            if self.disable_opening_subtractions:
+            if element.is_a("IfcTypeProduct") or self.disable_opening_subtractions:
                 shape = ifcopenshell.geom.create_shape(settings, self.file.by_id(self.ifc_definition_id))
             else:
                 shape = ifcopenshell.geom.create_shape(settings, self.file.by_id(self.oprops.ifc_definition_id))
@@ -192,32 +205,37 @@ class SwitchRepresentation(bpy.types.Operator):
         mesh = ifc_importer.create_mesh(element, shape)
         mesh.name = self.mesh_name
         mesh.BIMMeshProperties.ifc_definition_id = self.ifc_definition_id
-        self.obj.data.user_remap(mesh)
+        self.element_obj.data.user_remap(mesh)
         material_creator = import_ifc.MaterialCreator(ifc_import_settings, ifc_importer)
-        material_creator.create(element, self.obj, mesh)
+        material_creator.create(element, self.element_obj, mesh)
 
         if self.disable_opening_subtractions and self.context_of_items.ContextIdentifier == "Body":
             if self.oprops.ifc_definition_id not in VoidData.products:
                 VoidData.load(IfcStore.get_file(), self.oprops.ifc_definition_id)
             for opening_id in VoidData.products[self.oprops.ifc_definition_id]:
-                if opening_id in IfcStore.id_map:
-                    opening = IfcStore.id_map[opening_id]
-                    modifier = self.obj.modifiers.new("IfcOpeningElement", "BOOLEAN")
-                    modifier.operation = "DIFFERENCE"
-                    modifier.object = opening
+                opening = IfcStore.get_element(opening_id)
+                if not opening:
+                    continue
+                modifier = self.element_obj.modifiers.new("IfcOpeningElement", "BOOLEAN")
+                modifier.operation = "DIFFERENCE"
+                modifier.object = opening
         else:
-            for modifier in self.obj.modifiers:
+            for modifier in self.element_obj.modifiers:
                 if modifier.type == "BOOLEAN" and "IfcOpeningElement" in modifier.name:
-                    self.obj.modifiers.remove(modifier)
+                    self.element_obj.modifiers.remove(modifier)
 
 
 class RemoveRepresentation(bpy.types.Operator):
     bl_idname = "bim.remove_representation"
     bl_label = "Remove Representation"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     representation_id: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         representation = self.file.by_id(self.representation_id)
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
@@ -247,68 +265,17 @@ class RemoveRepresentation(bpy.types.Operator):
         return {"FINISHED"}
 
 
-class MapRepresentations(bpy.types.Operator):
-    bl_idname = "bim.map_representations"
-    bl_label = "Map Representations"
-    product_id: bpy.props.IntProperty()
-    type_product_id: bpy.props.IntProperty()
-
-    def execute(self, context):
-        related_object = IfcStore.id_map[self.product_id]
-
-        if self.product_id not in Data.products:
-            Data.load(IfcStore.get_file(), self.product_id)
-
-        for representation_id in Data.products[self.product_id]:
-            bpy.ops.bim.remove_representation(obj=related_object.name, representation_id=representation_id)
-
-        if self.type_product_id not in Data.products:
-            Data.load(IfcStore.get_file(), self.type_product_id)
-
-        for representation_id in Data.products[self.type_product_id]:
-            bpy.ops.bim.map_representation(
-                obj=related_object.name,
-                representation_id=representation_id,
-                obj_data=IfcStore.id_map[self.type_product_id].data.name,
-            )
-        return {"FINISHED"}
-
-
-class MapRepresentation(bpy.types.Operator):
-    bl_idname = "bim.map_representation"
-    bl_label = "Map Representation"
-    obj: bpy.props.StringProperty()
-    representation_id: bpy.props.IntProperty()
-    obj_data: bpy.props.StringProperty()
-
-    def execute(self, context):
-        objs = [bpy.data.objects.get(self.obj)] if self.obj else bpy.context.selected_objects
-        obj_data = bpy.data.meshes.get(self.obj_data) if self.obj_data else None
-
-        self.file = IfcStore.get_file()
-
-        for obj in objs:
-            bpy.ops.bim.edit_object_placement(obj=obj.name)
-            product = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
-            if obj_data:
-                obj.data = obj_data
-            result = ifcopenshell.api.run(
-                "geometry.map_representation", self.file, **{"representation": self.file.by_id(self.representation_id)}
-            )
-            ifcopenshell.api.run(
-                "geometry.assign_representation", self.file, **{"product": product, "representation": result}
-            )
-            Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
-        return {"FINISHED"}
-
-
-class UpdateMeshRepresentation(bpy.types.Operator):
-    bl_idname = "bim.update_mesh_representation"
-    bl_label = "Update Mesh Representation"
+class UpdateRepresentation(bpy.types.Operator):
+    bl_idname = "bim.update_representation"
+    bl_label = "Update Representation"
+    bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
     ifc_representation_class: bpy.props.StringProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         if not ContextData.is_loaded:
             ContextData.load(IfcStore.get_file())
 
@@ -317,14 +284,14 @@ class UpdateMeshRepresentation(bpy.types.Operator):
 
         for obj in objs:
             self.update_obj_mesh_representation(context, obj)
-            IfcStore.edited_objs.discard(obj.name)
+            IfcStore.edited_objs.discard(obj)
         return {"FINISHED"}
 
     def update_obj_mesh_representation(self, context, obj):
         product = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
 
         if product.is_a("IfcGridAxis"):
-            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"AxisCurve": obj, "grid_axis": product})
+            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"axis_curve": obj, "grid_axis": product})
             return
 
         bpy.ops.bim.edit_object_placement(obj=obj.name)
@@ -356,37 +323,6 @@ class UpdateMeshRepresentation(bpy.types.Operator):
 
         new_representation = ifcopenshell.api.run("geometry.add_representation", self.file, **representation_data)
 
-        # if product.is_a("IfcWall"):
-        #    # Generate axis representation
-        #    axis_context_id = get_context_id("Model", "Axis", "MODEL_VIEW")
-        #    old_axis = ifcopenshell.util.element.get_representation(product, "Model", "Axis", "MODEL_VIEW")
-        #    if (
-        #        axis_context_id
-        #        and old_axis
-        #        and context_of_items.ContextType == "Model"
-        #        and context_of_items.ContextIdentifier
-        #        and context_of_items.ContextIdentifier == "Body"
-        #    ):
-        #        has_axis_generator = False
-        #        if has_axis_generator:
-        #            # TODO, just pseudocode for now
-        #            representation_data["geometry"] = axis_generator_function_call
-        #        pass
-
-        box_context_id = get_context_id("Model", "Box", "MODEL_VIEW")
-        old_box = ifcopenshell.util.element.get_representation(product, "Model", "Box", "MODEL_VIEW")
-        if (
-            box_context_id
-            and old_box
-            and context_of_items.ContextType == "Model"
-            and context_of_items.ContextIdentifier
-            and context_of_items.ContextIdentifier == "Body"
-        ):
-            representation_data["context"] = self.file.by_id(box_context_id)
-            new_box = ifcopenshell.api.run("geometry.add_representation", self.file, **representation_data)
-            for inverse in self.file.get_inverse(old_box):
-                ifcopenshell.util.element.replace_attribute(inverse, old_box, new_box)
-
         ifcopenshell.api.run(
             "geometry.assign_styles",
             self.file,
@@ -414,6 +350,7 @@ class UpdateMeshRepresentation(bpy.types.Operator):
 class UpdateParametricRepresentation(bpy.types.Operator):
     bl_idname = "bim.update_parametric_representation"
     bl_label = "Update Parametric Representation"
+    bl_options = {"REGISTER", "UNDO"}
     index: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -422,13 +359,14 @@ class UpdateParametricRepresentation(bpy.types.Operator):
         props = obj.data.BIMMeshProperties
         parameter = props.ifc_parameters[self.index]
         element = IfcStore.get_file().by_id(parameter.step_id)[parameter.index] = parameter.value
-        bpy.ops.bim.switch_representation(ifc_definition_id=props.ifc_definition_id)
+        bpy.ops.bim.switch_representation(ifc_definition_id=props.ifc_definition_id, should_reload=True)
         return {"FINISHED"}
 
 
 class GetRepresentationIfcParameters(bpy.types.Operator):
     bl_idname = "bim.get_representation_ifc_parameters"
     bl_label = "Get Representation IFC Parameters"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         self.file = IfcStore.get_file()

src/blenderbim/blenderbim/bim/module/geometry/ui.py

@@ -14,6 +14,8 @@ class BIM_PT_representations(Panel):
 
     @classmethod
     def poll(cls, context):
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
         return IfcStore.get_file()
 
     def draw(self, context):
@@ -39,6 +41,7 @@ class BIM_PT_representations(Panel):
             row.label(text=representation["ContextOfItems"]["TargetView"])
             row.label(text=representation["RepresentationType"])
             op = row.operator("bim.switch_representation", icon="OUTLINER_DATA_MESH", text="")
+            op.should_reload = True
             op.ifc_definition_id = ifc_definition_id
             op.disable_opening_subtractions = False
             row.operator("bim.remove_representation", icon="X", text="").representation_id = ifc_definition_id
@@ -68,29 +71,31 @@ class BIM_PT_mesh(Panel):
 
         row = layout.row(align=True)
         op = row.operator("bim.switch_representation", text="Bake Voids", icon="SELECT_SUBTRACT")
+        op.should_reload = True
         op.ifc_definition_id = props.ifc_definition_id
         op.disable_opening_subtractions = False
         op = row.operator("bim.switch_representation", text="Dynamic Voids", icon="SELECT_INTERSECT")
+        op.should_reload = True
         op.ifc_definition_id = props.ifc_definition_id
         op.disable_opening_subtractions = True
 
         row = layout.row()
-        row.operator("bim.update_mesh_representation")
+        row.operator("bim.update_representation")
 
         row = layout.row()
-        op = row.operator("bim.update_mesh_representation", text="Update Mesh As Rectangle Extrusion")
+        op = row.operator("bim.update_representation", text="Update Mesh As Rectangle Extrusion")
         op.ifc_representation_class = "IfcExtrudedAreaSolid/IfcRectangleProfileDef"
 
         row = layout.row()
-        op = row.operator("bim.update_mesh_representation", text="Update Mesh As Circle Extrusion")
+        op = row.operator("bim.update_representation", text="Update Mesh As Circle Extrusion")
         op.ifc_representation_class = "IfcExtrudedAreaSolid/IfcCircleProfileDef"
 
         row = layout.row()
-        op = row.operator("bim.update_mesh_representation", text="Update Mesh As Arbitrary Extrusion")
+        op = row.operator("bim.update_representation", text="Update Mesh As Arbitrary Extrusion")
         op.ifc_representation_class = "IfcExtrudedAreaSolid/IfcArbitraryClosedProfileDef"
 
         row = layout.row()
-        op = row.operator("bim.update_mesh_representation", text="Update Mesh As Arbitrary Extrusion With Voids")
+        op = row.operator("bim.update_representation", text="Update Mesh As Arbitrary Extrusion With Voids")
         op.ifc_representation_class = "IfcExtrudedAreaSolid/IfcArbitraryProfileDefWithVoids"
 
         row = layout.row()
@@ -108,6 +113,36 @@ def BIM_PT_transform(self, context):
         row.operator("bim.edit_object_placement")
 
 
+class BIM_PT_derived_placements(Panel):
+    bl_label = "IFC Derived Placements"
+    bl_idname = "BIM_PT_derived_placements"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+    bl_parent_id = "OBJECT_PT_transform"
+
+    def draw(self, context):
+        z = context.active_object.matrix_world.translation.z
+        z_values = [co[2] for co in context.active_object.bound_box]
+        row = self.layout.row(align=True)
+        row.label(text="Min Global Z")
+        row.label(text="{0:.3f}".format(min(z_values) + z))
+        row = self.layout.row(align=True)
+        row.label(text="Max Global Z")
+        row.label(text="{0:.3f}".format(max(z_values) + z))
+
+        collection = bpy.data.objects.get(context.active_object.users_collection[0].name)
+        if collection:
+            collection_z = collection.matrix_world.translation.z
+            row = self.layout.row(align=True)
+            row.label(text="Min Local Z")
+            row.label(text="{0:.3f}".format(min(z_values) + z - collection_z))
+            row = self.layout.row(align=True)
+            row.label(text="Max Local Z")
+            row.label(text="{0:.3f}".format(max(z_values) + z - collection_z))
+
+
 class BIM_PT_workarounds(Panel):
     bl_label = "IFC Vendor Workarounds"
     bl_idname = "BIM_PT_workarounds"

src/blenderbim/blenderbim/bim/module/georeference/ui.py

@@ -117,6 +117,7 @@ class BIM_PT_gis(Panel):
             row = self.layout.row(align=True)
             row.label(text="XAxisOrdinate")
             row.label(text=props.blender_x_axis_ordinate)
+            row = self.layout.row(align=True)
             row.label(text="Derived Grid North")
             row.label(
                 text=str(
@@ -187,6 +188,7 @@ class BIM_PT_gis(Panel):
 class BIM_PT_gis_utilities(Panel):
     bl_idname = "BIM_PT_gis_utilities"
     bl_label = "Georeferencing Utilities"
+    bl_options = {"DEFAULT_CLOSED"}
     bl_space_type = "VIEW_3D"
     bl_region_type = "UI"
     bl_category = "BlenderBIM"

src/blenderbim/blenderbim/bim/module/group/__init__.py

@@ -11,6 +11,7 @@ classes = (
     operator.UnassignGroup,
     operator.EnableEditingGroup,
     operator.DisableEditingGroup,
+    operator.SelectGroupProducts,
     prop.Group,
     prop.BIMGroupProperties,
     ui.BIM_PT_groups,

src/blenderbim/blenderbim/bim/module/group/operator.py

@@ -8,6 +8,7 @@ from ifcopenshell.api.group.data import Data
 class LoadGroups(bpy.types.Operator):
     bl_idname = "bim.load_groups"
     bl_label = "Load Groups"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         props = context.scene.BIMGroupProperties
@@ -25,6 +26,7 @@ class LoadGroups(bpy.types.Operator):
 class DisableGroupEditingUI(bpy.types.Operator):
     bl_idname = "bim.disable_group_editing_ui"
     bl_label = "Disable Group Editing UI"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMGroupProperties.is_editing = False
@@ -34,8 +36,12 @@ class DisableGroupEditingUI(bpy.types.Operator):
 class AddGroup(bpy.types.Operator):
     bl_idname = "bim.add_group"
     bl_label = "Add Group"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         result = ifcopenshell.api.run("group.add_group", IfcStore.get_file())
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_groups()
@@ -46,8 +52,12 @@ class AddGroup(bpy.types.Operator):
 class EditGroup(bpy.types.Operator):
     bl_idname = "bim.edit_group"
     bl_label = "Edit Group"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMGroupProperties
         attributes = {}
         for attribute in props.group_attributes:
@@ -67,9 +77,13 @@ class EditGroup(bpy.types.Operator):
 class RemoveGroup(bpy.types.Operator):
     bl_idname = "bim.remove_group"
     bl_label = "Remove Group"
+    bl_options = {"REGISTER", "UNDO"}
     group: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMGroupProperties
         self.file = IfcStore.get_file()
         ifcopenshell.api.run("group.remove_group", self.file, **{"group": self.file.by_id(self.group)})
@@ -81,6 +95,7 @@ class RemoveGroup(bpy.types.Operator):
 class EnableEditingGroup(bpy.types.Operator):
     bl_idname = "bim.enable_editing_group"
     bl_label = "Enable Editing Group"
+    bl_options = {"REGISTER", "UNDO"}
     group: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -106,6 +121,7 @@ class EnableEditingGroup(bpy.types.Operator):
 class DisableEditingGroup(bpy.types.Operator):
     bl_idname = "bim.disable_editing_group"
     bl_label = "Disable Editing Group"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMGroupProperties.active_group_id = 0
@@ -115,10 +131,14 @@ class DisableEditingGroup(bpy.types.Operator):
 class AssignGroup(bpy.types.Operator):
     bl_idname = "bim.assign_group"
     bl_label = "Assign Group"
+    bl_options = {"REGISTER", "UNDO"}
     product: bpy.props.StringProperty()
     group: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         product = bpy.data.objects.get(self.product) if self.product else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -136,10 +156,14 @@ class AssignGroup(bpy.types.Operator):
 class UnassignGroup(bpy.types.Operator):
     bl_idname = "bim.unassign_group"
     bl_label = "Unassign Group"
+    bl_options = {"REGISTER", "UNDO"}
     product: bpy.props.StringProperty()
     group: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         product = bpy.data.objects.get(self.product) if self.product else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -152,3 +176,21 @@ class UnassignGroup(bpy.types.Operator):
         )
         Data.load(IfcStore.get_file())
         return {"FINISHED"}
+
+
+class SelectGroupProducts(bpy.types.Operator):
+    bl_idname = "bim.select_group_products"
+    bl_label = "Select Group Products"
+    bl_options = {"REGISTER", "UNDO"}
+    group: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        for obj in bpy.context.visible_objects:
+            obj.select_set(False)
+            if not obj.BIMObjectProperties.ifc_definition_id:
+                continue
+            product_groups = Data.products.get(obj.BIMObjectProperties.ifc_definition_id, [])
+            if self.group in product_groups:
+                obj.select_set(True)
+        return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/group/ui.py

@@ -24,7 +24,7 @@ class BIM_PT_groups(Panel):
         row.label(text="{} Groups Found".format(len(Data.groups)), icon="OUTLINER")
         if self.props.is_editing:
             row.operator("bim.add_group", text="", icon="ADD")
-            row.operator("bim.disable_group_editing_ui", text="", icon="CHECKMARK")
+            row.operator("bim.disable_group_editing_ui", text="", icon="CANCEL")
         else:
             row.operator("bim.load_groups", text="", icon="GREASEPENCIL")
 
@@ -69,11 +69,17 @@ class BIM_UL_groups(UIList):
                     op.group = item.ifc_definition_id
 
             if context.scene.BIMGroupProperties.active_group_id == item.ifc_definition_id:
+                op = row.operator("bim.select_group_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.group = item.ifc_definition_id
                 row.operator("bim.edit_group", text="", icon="CHECKMARK")
-                row.operator("bim.disable_editing_group", text="", icon="X")
+                row.operator("bim.disable_editing_group", text="", icon="CANCEL")
             elif context.scene.BIMGroupProperties.active_group_id:
+                op = row.operator("bim.select_group_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.group = item.ifc_definition_id
                 row.operator("bim.remove_group", text="", icon="X").group = item.ifc_definition_id
             else:
+                op = row.operator("bim.select_group_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.group = item.ifc_definition_id
                 op = row.operator("bim.enable_editing_group", text="", icon="GREASEPENCIL")
                 op.group = item.ifc_definition_id
                 row.operator("bim.remove_group", text="", icon="X").group = item.ifc_definition_id

src/blenderbim/blenderbim/bim/module/layer/operator.py

@@ -9,6 +9,7 @@ from ifcopenshell.api.layer.data import Data
 class LoadLayers(bpy.types.Operator):
     bl_idname = "bim.load_layers"
     bl_label = "Load Layers"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         self.file = IfcStore.get_file()
@@ -27,6 +28,7 @@ class LoadLayers(bpy.types.Operator):
 class DisableLayerEditingUI(bpy.types.Operator):
     bl_idname = "bim.disable_layer_editing_ui"
     bl_label = "Disable Layer Editing UI"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMLayerProperties.is_editing = False
@@ -36,6 +38,7 @@ class DisableLayerEditingUI(bpy.types.Operator):
 class EnableEditingLayer(bpy.types.Operator):
     bl_idname = "bim.enable_editing_layer"
     bl_label = "Enable Editing Layer"
+    bl_options = {"REGISTER", "UNDO"}
     layer: bpy.props.IntProperty()
 
     def execute(self, context):
@@ -61,6 +64,7 @@ class EnableEditingLayer(bpy.types.Operator):
 class DisableEditingLayer(bpy.types.Operator):
     bl_idname = "bim.disable_editing_layer"
     bl_label = "Disable Editing Layer"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         context.scene.BIMLayerProperties.active_layer_id = 0
@@ -70,8 +74,12 @@ class DisableEditingLayer(bpy.types.Operator):
 class AddPresentationLayer(bpy.types.Operator):
     bl_idname = "bim.add_presentation_layer"
     bl_label = "Add Layer"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         result = ifcopenshell.api.run("layer.add_layer", IfcStore.get_file())
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_layers()
@@ -82,8 +90,12 @@ class AddPresentationLayer(bpy.types.Operator):
 class EditPresentationLayer(bpy.types.Operator):
     bl_idname = "bim.edit_presentation_layer"
     bl_label = "Edit Layer"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMLayerProperties
         attributes = {}
         for attribute in props.layer_attributes:
@@ -103,9 +115,13 @@ class EditPresentationLayer(bpy.types.Operator):
 class RemovePresentationLayer(bpy.types.Operator):
     bl_idname = "bim.remove_presentation_layer"
     bl_label = "Remove Presentation Layer"
+    bl_options = {"REGISTER", "UNDO"}
     layer: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         props = context.scene.BIMLayerProperties
         self.file = IfcStore.get_file()
         ifcopenshell.api.run("layer.remove_layer", self.file, **{"layer": self.file.by_id(self.layer)})
@@ -117,10 +133,14 @@ class RemovePresentationLayer(bpy.types.Operator):
 class AssignPresentationLayer(bpy.types.Operator):
     bl_idname = "bim.assign_presentation_layer"
     bl_label = "Assign Presentation Layer"
+    bl_options = {"REGISTER", "UNDO"}
     item: bpy.props.StringProperty()
     layer: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         item = bpy.data.meshes.get(self.item) if self.item else context.active_object.data
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
@@ -135,10 +155,14 @@ class AssignPresentationLayer(bpy.types.Operator):
 class UnassignPresentationLayer(bpy.types.Operator):
     bl_idname = "bim.unassign_presentation_layer"
     bl_label = "Unassign Presentation Layer"
+    bl_options = {"REGISTER", "UNDO"}
     item: bpy.props.StringProperty()
     layer: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         item = bpy.data.meshes.get(self.item) if self.item else context.active_object.data
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(

src/blenderbim/blenderbim/bim/module/material/operator.py

@@ -2,6 +2,7 @@ import bpy
 import json
 import ifcopenshell.api
 import ifcopenshell.util.attribute
+import blenderbim.bim.helper
 from blenderbim.bim.module.material.prop import purge as material_prop_purge
 from blenderbim.bim.ifc import IfcStore
 from ifcopenshell.api.material.data import Data
@@ -26,7 +27,7 @@ class AssignParameterizedProfile(bpy.types.Operator):
         ifcopenshell.api.run(
             "material.assign_profile",
             self.file,
-            **{"material_profile": self.file.by_id(self.material_profile), "profile": profile}
+            **{"material_profile": self.file.by_id(self.material_profile), "profile": profile},
         )
         Data.load_profiles()
         ProfileData.load(self.file)
@@ -42,7 +43,7 @@ class AddMaterial(bpy.types.Operator):
     def execute(self, context):
         obj = bpy.data.materials.get(self.obj) if self.obj else bpy.context.active_object.active_material
         self.file = IfcStore.get_file()
-        result = ifcopenshell.api.run("material.add_material", self.file, **{"Name": obj.name})
+        result = ifcopenshell.api.run("material.add_material", self.file, **{"name": obj.name})
         obj.BIMObjectProperties.ifc_definition_id = result.id()
         Data.load(IfcStore.get_file())
         material_prop_purge()
@@ -175,9 +176,7 @@ class RemoveProfile(bpy.types.Operator):
     def execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
         self.file = IfcStore.get_file()
-        ifcopenshell.api.run(
-            "material.remove_profile", self.file, **{"profile": self.file.by_id(self.profile)}
-        )
+        ifcopenshell.api.run("material.remove_profile", self.file, **{"profile": self.file.by_id(self.profile)})
         Data.load_profiles()
         return {"FINISHED"}
 
@@ -313,20 +312,28 @@ class EnableEditingAssignedMaterial(bpy.types.Operator):
         elif product_data["type"] == "IfcMaterialLayerSet":
             material_set_data = Data.layer_sets[product_data["id"]]
         elif product_data["type"] == "IfcMaterialLayerSetUsage":
-            layer_set_usage = Data.layer_set_usages[product_data["id"]]
-            material_set_data = Data.layer_sets[layer_set_usage["ForLayerSet"]]
+            material_set_usage = Data.layer_set_usages[product_data["id"]]
+            material_set_data = Data.layer_sets[material_set_usage["ForLayerSet"]]
             material_set_class = "IfcMaterialLayerSet"
         elif product_data["type"] == "IfcMaterialProfileSet":
             material_set_data = Data.profile_sets[product_data["id"]]
         elif product_data["type"] == "IfcMaterialProfileSetUsage":
-            profile_set_usage = Data.profile_set_usages[product_data["id"]]
-            material_set_data = Data.profile_sets[profile_set_usage["ForProfileSet"]]
+            material_set_usage = Data.profile_set_usages[product_data["id"]]
+            material_set_data = Data.profile_sets[material_set_usage["ForProfileSet"]]
             material_set_class = "IfcMaterialProfileSet"
         elif product_data["type"] == "IfcMaterialList":
             material_set_data = Data.lists[product_data["id"]]
         else:
             material_set_data = {}
 
+        while len(props.material_set_usage_attributes) > 0:
+            props.material_set_usage_attributes.remove(0)
+
+        if "Usage" in product_data["type"]:
+            blenderbim.bim.helper.import_attributes(
+                product_data["type"], props.material_set_usage_attributes, material_set_usage, self.import_attributes
+            )
+
         while len(props.material_set_attributes) > 0:
             props.material_set_attributes.remove(0)
 
@@ -340,6 +347,36 @@ class EnableEditingAssignedMaterial(bpy.types.Operator):
                 new.string_value = "" if new.is_null else material_set_data[attribute.name()]
         return {"FINISHED"}
 
+    def import_attributes(self, name, prop, data):
+        if name == "CardinalPoint":
+            # TODO: complain to buildingSMART
+            cardinal_point_map = {
+                1: "bottom left",
+                2: "bottom centre",
+                3: "bottom right",
+                4: "mid-depth left",
+                5: "mid-depth centre",
+                6: "mid-depth right",
+                7: "top left",
+                8: "top centre",
+                9: "top right",
+                10: "geometric centroid",
+                11: "bottom in line with the geometric centroid",
+                12: "left in line with the geometric centroid",
+                13: "right in line with the geometric centroid",
+                14: "top in line with the geometric centroid",
+                15: "shear centre",
+                16: "bottom in line with the shear centre",
+                17: "left in line with the shear centre",
+                18: "right in line with the shear centre",
+                19: "top in line with the shear centre",
+            }
+            prop.data_type = "enum"
+            prop.enum_items = json.dumps(cardinal_point_map)
+            if data[name]:
+                prop.enum_value = str(data[name])
+            return True
+
 
 class DisableEditingAssignedMaterial(bpy.types.Operator):
     bl_idname = "bim.disable_editing_assigned_material"
@@ -358,6 +395,7 @@ class EditAssignedMaterial(bpy.types.Operator):
     bl_label = "Edit Assigned Material"
     obj: bpy.props.StringProperty()
     material_set: bpy.props.IntProperty()
+    material_set_usage: bpy.props.IntProperty()
 
     def execute(self, context):
         self.file = IfcStore.get_file()
@@ -379,12 +417,24 @@ class EditAssignedMaterial(bpy.types.Operator):
         ifcopenshell.api.run(
             "material.edit_assigned_material",
             self.file,
-            **{
-                "element": material_set,
-                "attributes": attributes,
-            },
+            **{"element": material_set, "attributes": attributes},
         )
         Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
+
+        if self.material_set_usage:
+            material_set_usage = self.file.by_id(self.material_set_usage)
+            attributes = blenderbim.bim.helper.export_attributes(props.material_set_usage_attributes)
+            attributes["CardinalPoint"] = int(attributes["CardinalPoint"]) if attributes["CardinalPoint"] else None
+            ifcopenshell.api.run(
+                "material.edit_profile_usage",
+                self.file,
+                **{"usage": material_set_usage, "attributes": attributes},
+            )
+            if material_set_usage.is_a("IfcMaterialLayerSetUsage"):
+                Data.load_layer_usages()
+            elif material_set_usage.is_a("IfcMaterialProfileSetUsage"):
+                Data.load_profile_usages()
+
         if material_set.is_a("IfcMaterialConstituentSet"):
             Data.load_constituents()
         elif material_set.is_a("IfcMaterialLayerSet"):

src/blenderbim/blenderbim/bim/module/material/prop.py

@@ -1,5 +1,4 @@
 import bpy
-import blenderbim.bim.schema  # refactor
 from ifcopenshell.api.material.data import Data
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty, Attribute
@@ -84,6 +83,7 @@ class BIMObjectMaterialProperties(PropertyGroup):
     material_type: EnumProperty(items=getMaterialTypes, name="Material Type")
     material: EnumProperty(items=getMaterials, name="Material")
     is_editing: BoolProperty(name="Is Editing", default=False)
+    material_set_usage_attributes: CollectionProperty(name="Material Set Usage Attributes", type=Attribute)
     material_set_attributes: CollectionProperty(name="Material Set Attributes", type=Attribute)
     active_material_set_item_id: IntProperty(name="Active Material Set ID")
     material_set_item_attributes: CollectionProperty(name="Material Set Item Attributes", type=Attribute)

src/blenderbim/blenderbim/bim/module/material/ui.py

@@ -1,3 +1,4 @@
+import blenderbim.bim.helper
 from bpy.types import Panel
 from ifcopenshell.api.material.data import Data
 from ifcopenshell.api.profile.data import Data as ProfileData
@@ -35,6 +36,8 @@ class BIM_PT_object_material(Panel):
         props = context.active_object.BIMObjectProperties
         if not props.ifc_definition_id:
             return False
+        if not IfcStore.get_element(props.ifc_definition_id):
+            return False
         if not hasattr(IfcStore.get_file().by_id(props.ifc_definition_id), "HasAssociations"):
             return False
         return True
@@ -109,7 +112,9 @@ class BIM_PT_object_material(Panel):
         if self.props.is_editing:
             op = row.operator("bim.edit_assigned_material", icon="CHECKMARK", text="")
             op.material_set = self.material_set_id
-            row.operator("bim.disable_editing_assigned_material", icon="X", text="")
+            if "Usage" in self.product_data["type"]:
+                op.material_set_usage = self.product_data["id"]
+            row.operator("bim.disable_editing_assigned_material", icon="CANCEL", text="")
         else:
             row.operator("bim.enable_editing_assigned_material", icon="GREASEPENCIL", text="")
             row.operator("bim.unassign_material", icon="X", text="")
@@ -140,6 +145,8 @@ class BIM_PT_object_material(Panel):
         self.draw_read_only_set_ui()
 
     def draw_editable_set_ui(self):
+        blenderbim.bim.helper.draw_attributes(self.props.material_set_usage_attributes, self.layout)
+
         for attribute in self.props.material_set_attributes:
             row = self.layout.row(align=True)
             row.prop(attribute, "string_value", text=attribute.name)
@@ -168,7 +175,7 @@ class BIM_PT_object_material(Panel):
         row.prop(self.props, "material_set_item_material", icon="MATERIAL")
         op = row.operator("bim.edit_material_set_item", icon="CHECKMARK", text="")
         op.material_set_item = set_item_id
-        row.operator("bim.disable_editing_material_set_item", icon="X", text="")
+        row.operator("bim.disable_editing_material_set_item", icon="CANCEL", text="")
 
         for attribute in self.props.material_set_item_attributes:
             row = box.row(align=True)
@@ -197,7 +204,7 @@ class BIM_PT_object_material(Panel):
         else:
             # TODO: support non parametric profiles by showing a list of named profiles to select from, or an
             # eyedropper to pick profile geometry from the scene
-            row.operator("bim.disable_editing_material_set_item", icon="X", text="")
+            row.operator("bim.disable_editing_material_set_item", icon="CANCEL", text="")
 
     def draw_editable_profile_ui(self, layout, item):
         for attribute in self.props.material_set_item_profile_attributes:
@@ -224,7 +231,11 @@ class BIM_PT_object_material(Panel):
         else:
             item = self.set_data[set_item_id]
             row = self.layout.row(align=True)
-            row.label(text=item.get("Name", "Unnamed") or "Unnamed", icon="ALIGN_CENTER")
+            item_name = item.get("Name", "Unnamed") or "Unnamed"
+            thickness = item.get("LayerThickness")
+            if thickness:
+                item_name += f" ({thickness})"
+            row.label(text=item_name, icon="ALIGN_CENTER")
             row.label(text=Data.materials[item["Material"]]["Name"], icon="MATERIAL")
 
         if not is_first:
@@ -261,6 +272,39 @@ class BIM_PT_object_material(Panel):
             row.label(text="Description")
             row.label(text=str(self.material_set_data["Description"]))
 
+        if self.product_data["type"] == "IfcMaterialProfileSetUsage":
+            # TODO: complain to buildingSMART
+            cardinal_point_map = {
+                1: "bottom left",
+                2: "bottom centre",
+                3: "bottom right",
+                4: "mid-depth left",
+                5: "mid-depth centre",
+                6: "mid-depth right",
+                7: "top left",
+                8: "top centre",
+                9: "top right",
+                10: "geometric centroid",
+                11: "bottom in line with the geometric centroid",
+                12: "left in line with the geometric centroid",
+                13: "right in line with the geometric centroid",
+                14: "top in line with the geometric centroid",
+                15: "shear centre",
+                16: "bottom in line with the shear centre",
+                17: "left in line with the shear centre",
+                18: "right in line with the shear centre",
+                19: "top in line with the shear centre",
+            }
+            if self.material_set_usage["CardinalPoint"]:
+                row = self.layout.row(align=True)
+                row.label(text="CardinalPoint")
+                row.label(text=cardinal_point_map[self.material_set_usage["CardinalPoint"]])
+            if self.material_set_usage["ReferenceExtent"]:
+                row = self.layout.row(align=True)
+                row.label(text="ReferenceExtent")
+                row.label(text=str(self.material_set_usage["ReferenceExtent"]))
+
+        total_thickness = 0
         for item_id in self.set_items:
             if self.product_data["type"] == "IfcMaterialList":
                 row = self.layout.row(align=True)
@@ -269,5 +313,14 @@ class BIM_PT_object_material(Panel):
             else:
                 item = self.set_data[item_id]
                 row = self.layout.row(align=True)
-                row.label(text=item.get("Name", "Unnamed") or "Unnamed", icon="ALIGN_CENTER")
+                item_name = item.get("Name", "Unnamed") or "Unnamed"
+                thickness = item.get("LayerThickness")
+                if thickness:
+                    item_name += f" ({thickness})"
+                    total_thickness += thickness
+                row.label(text=item_name, icon="ALIGN_CENTER")
                 row.label(text=Data.materials[item["Material"]]["Name"], icon="MATERIAL")
+
+        if total_thickness:
+            row = self.layout.row(align=True)
+            row.label(text=f"Total Thickness: {total_thickness}")

src/blenderbim/blenderbim/bim/module/model/__init__.py

@@ -1,13 +1,21 @@
 import bpy
-from . import grid, wall, stair, door, window, slab, opening, pie
+from . import handler, prop, ui, grid, product, wall, slab, stair, door, window, opening, pie, workspace
 
 classes = (
+    product.AddTypeInstance,
+    wall.AddWall,
+    wall.JoinWall,
+    wall.AlignWall,
+    wall.FlipWall,
+    wall.SplitWall,
+    prop.BIMModelProperties,
+    ui.BIM_PT_authoring,
+    ui.BIM_PT_authoring_architectural,
+    ui.BIM_PT_misc_utilities,
     grid.BIM_OT_add_object,
-    wall.BIM_OT_add_object,
     stair.BIM_OT_add_object,
     door.BIM_OT_add_object,
     window.BIM_OT_add_object,
-    slab.BIM_OT_add_object,
     opening.BIM_OT_add_object,
     pie.OpenPieClass,
     pie.PieUpdateContainer,
@@ -27,13 +35,14 @@ addon_keymaps = []
 
 
 def register():
+    bpy.utils.register_tool(workspace.BimTool, after={"builtin.scale_cage"}, separator=True, group=True)
+    bpy.types.Scene.BIMModelProperties = bpy.props.PointerProperty(type=prop.BIMModelProperties)
     bpy.types.VIEW3D_MT_mesh_add.append(grid.add_object_button)
-    bpy.types.VIEW3D_MT_mesh_add.append(wall.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.append(stair.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.append(door.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.append(window.add_object_button)
-    bpy.types.VIEW3D_MT_mesh_add.append(slab.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.append(opening.add_object_button)
+    bpy.app.handlers.load_post.append(handler.load_post)
     wm = bpy.context.window_manager
     if wm.keyconfigs.addon:
         km = wm.keyconfigs.addon.keymaps.new(name="3D View", space_type="VIEW_3D")
@@ -43,12 +52,13 @@ def register():
 
 
 def unregister():
+    bpy.utils.unregister_tool(workspace.BimTool)
+    del bpy.types.Scene.BIMModelProperties
+    bpy.app.handlers.load_post.remove(handler.load_post)
     bpy.types.VIEW3D_MT_mesh_add.remove(grid.add_object_button)
-    bpy.types.VIEW3D_MT_mesh_add.remove(wall.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.remove(stair.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.remove(door.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.remove(window.add_object_button)
-    bpy.types.VIEW3D_MT_mesh_add.remove(slab.add_object_button)
     bpy.types.VIEW3D_MT_mesh_add.remove(opening.add_object_button)
     wm = bpy.context.window_manager
     kc = wm.keyconfigs.addon

src/blenderbim/blenderbim/bim/module/model/column.py

@@ -0,0 +1,168 @@
+import bpy
+import bmesh
+import math
+import ifcopenshell
+import ifcopenshell.util.type
+import ifcopenshell.util.unit
+import ifcopenshell.util.element
+import mathutils.geometry
+import blenderbim.bim.handler
+from blenderbim.bim.ifc import IfcStore
+from math import pi, degrees
+from mathutils import Vector, Matrix
+from ifcopenshell.api.pset.data import Data as PsetData
+from ifcopenshell.api.material.data import Data as MaterialData
+from blenderbim.bim.module.geometry.helper import Helper
+
+
+def element_listener(element, obj):
+    blenderbim.bim.handler.subscribe_to(obj, "mode", mode_callback)
+
+
+def mode_callback(obj, data):
+    for obj in bpy.context.selected_objects + [bpy.context.active_object]:
+        if (
+            obj.mode != "EDIT"
+            or not obj.data
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
+            or not bpy.context.scene.BIMProjectProperties.is_authoring
+        ):
+            return
+        product = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+        parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+        if not parametric or parametric["Engine"] != "BlenderBIM.DumbColumn":
+            return
+        IfcStore.edited_objs.add(obj)
+        bm = bmesh.from_edit_mesh(obj.data)
+        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
+        bmesh.update_edit_mesh(obj.data)
+        bm.free()
+
+
+def ensure_solid(usecase_path, ifc_file, settings):
+    product = ifc_file.by_id(settings["blender_object"].BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbColumn":
+        return
+    material = ifcopenshell.util.element.get_material(product)
+    if material and material.is_a("IfcMaterialProfileSetUsage"):
+        settings["profile_set_usage"] = material
+    else:
+        return
+    settings["ifc_representation_class"] = "IfcExtrudedAreaSolid/IfcMaterialProfileSetUsage"
+
+
+class DumbColumnGenerator:
+    def __init__(self, relating_type):
+        self.relating_type = relating_type
+
+    def generate(self):
+        self.file = IfcStore.get_file()
+        unit_scale = ifcopenshell.util.unit.calculate_unit_scale(IfcStore.get_file())
+        material = ifcopenshell.util.element.get_material(self.relating_type)
+        if material and material.is_a("IfcMaterialProfileSet"):
+            self.profile_set = material
+        else:
+            return
+
+        self.collection = bpy.context.view_layer.active_layer_collection.collection
+        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.length = 3
+        self.rotation = 0
+        self.location = Vector((0, 0, 0))
+        return self.derive_from_cursor()
+
+    def derive_from_cursor(self):
+        self.location = bpy.context.scene.cursor.location
+        return self.create_column()
+
+    def create_column(self):
+        # A cube
+        verts = [
+            Vector((-1, -1, -1)),
+            Vector((-1, -1, 1)),
+            Vector((-1, 1, -1)),
+            Vector((-1, 1, 1)),
+            Vector((1, -1, -1)),
+            Vector((1, -1, 1)),
+            Vector((1, 1, -1)),
+            Vector((1, 1, 1)),
+        ]
+        edges = []
+        faces = [
+            [0, 2, 3, 1],
+            [2, 3, 7, 6],
+            [4, 5, 7, 6],
+            [0, 1, 5, 4],
+            [1, 3, 7, 5],
+            [0, 2, 6, 4],
+        ]
+
+        mesh = bpy.data.meshes.new(name="Dumb Column")
+        mesh.from_pydata(verts, edges, faces)
+        obj = bpy.data.objects.new("Column", mesh)
+        obj.name = "Column"
+        obj.location = self.location
+        if self.collection_obj and self.collection_obj.BIMObjectProperties.ifc_definition_id:
+            obj.location[2] = self.collection_obj.location[2]
+        self.collection.objects.link(obj)
+        bpy.ops.bim.assign_class(
+            obj=obj.name, ifc_class="IfcColumn", predefined_type="COLUMN", should_add_representation=False
+        )
+        element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+        bpy.ops.bim.assign_type(relating_type=self.relating_type.id(), related_object=obj.name)
+        profile_set_usage = ifcopenshell.util.element.get_material(element)
+        bpy.ops.bim.add_representation(
+            obj=obj.name,
+            context_id=ifcopenshell.util.representation.get_context(self.file, "Model", "Body", "MODEL_VIEW").id(),
+            ifc_representation_class="IfcExtrudedAreaSolid/IfcMaterialProfileSetUsage",
+            profile_set_usage=profile_set_usage.id(),
+        )
+        representation = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
+        bpy.ops.bim.switch_representation(obj=obj.name, ifc_definition_id=representation.id(), should_reload=True)
+        pset = ifcopenshell.api.run("pset.add_pset", self.file, product=element, name="EPset_Parametric")
+        ifcopenshell.api.run("pset.edit_pset", self.file, pset=pset, properties={"Engine": "BlenderBIM.DumbColumn"})
+        MaterialData.load(self.file)
+        obj.select_set(True)
+        return obj
+
+
+class DumbColumnRegenerator:
+    def regenerate_from_profile(self, usecase_path, ifc_file, settings):
+        self.file = IfcStore.get_file()
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        profile = settings["profile"].Profile
+        if not profile:
+            return
+        for profile_set in [
+            mp.ToMaterialProfileSet[0] for mp in self.file.get_inverse(profile) if mp.is_a("IfcMaterialProfile")
+        ]:
+            for inverse in ifc_file.get_inverse(profile_set):
+                if not inverse.is_a("IfcMaterialProfileSetUsage"):
+                    continue
+                if ifc_file.schema == "IFC2X3":
+                    for rel in ifc_file.get_inverse(inverse):
+                        if not rel.is_a("IfcRelAssociatesMaterial"):
+                            continue
+                        for element in rel.RelatedObjects:
+                            self.change_profile(element)
+                else:
+                    for rel in inverse.AssociatedTo:
+                        for element in rel.RelatedObjects:
+                            self.change_profile(element)
+
+    def regenerate_from_type(self, usecase_path, ifc_file, settings):
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        if not new_material or not new_material.is_a("IfcMaterialProfileSet"):
+            return
+        self.change_profile(settings["related_object"])
+
+    def change_profile(self, element):
+        obj = IfcStore.get_element(element.id())
+        if not obj:
+            return
+        representation = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
+        if representation:
+            bpy.ops.bim.switch_representation(obj=obj.name, ifc_definition_id=representation.id(), should_reload=True)

src/blenderbim/blenderbim/bim/module/model/grid.py

@@ -28,6 +28,7 @@ def add_object(self, context):
     self.file = IfcStore.get_file()
     if self.file:
         bpy.ops.bim.assign_class(obj=obj.name, ifc_class="IfcGrid")
+        collection.name = obj.name
         grid = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
         if has_site_collection:
             site_obj = bpy.data.objects.get(grandchild.name)
@@ -56,9 +57,10 @@ def add_object(self, context):
             result = ifcopenshell.api.run(
                 "grid.create_grid_axis",
                 self.file,
-                **{"AxisTag": tag, "AxisCurve": obj, "UVWAxes": "UAxes", "Grid": grid},
+                **{"axis_tag": tag, "uvw_axes": "UAxes", "grid": grid},
             )
-            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"AxisCurve": obj, "grid_axis": result})
+            IfcStore.link_element(result, obj)
+            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"axis_curve": obj, "grid_axis": result})
             obj.BIMObjectProperties.ifc_definition_id = result.id()
 
     axes_collection = bpy.data.collections.new("VAxes")
@@ -77,13 +79,14 @@ def add_object(self, context):
 
         axes_collection.objects.link(obj)
 
-        if IfcStore.get_file():
+        if self.file:
             result = ifcopenshell.api.run(
                 "grid.create_grid_axis",
                 self.file,
-                **{"AxisTag": tag, "AxisCurve": obj, "UVWAxes": "VAxes", "Grid": grid},
+                **{"axis_tag": tag, "uvw_axes": "VAxes", "grid": grid},
             )
-            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"AxisCurve": obj, "grid_axis": result})
+            IfcStore.link_element(result, obj)
+            ifcopenshell.api.run("grid.create_axis_curve", self.file, **{"axis_curve": obj, "grid_axis": result})
             obj.BIMObjectProperties.ifc_definition_id = result.id()
 
 

src/blenderbim/blenderbim/bim/module/model/handler.py

@@ -0,0 +1,67 @@
+import bpy
+import ifcopenshell
+import ifcopenshell.api
+from blenderbim.bim.module.model import product, wall, slab, column
+from blenderbim.bim.ifc import IfcStore
+from bpy.app.handlers import persistent
+
+
+@persistent
+def load_post(*args):
+    ifcopenshell.api.add_post_listener(
+        "geometry.add_representation", "BlenderBIM.Product.GenerateBox", product.generate_box
+    )
+    ifcopenshell.api.add_post_listener(
+        "material.edit_profile_usage",
+        "BlenderBIM.Product.RegenerateProfileUsage",
+        product.regenerate_profile_usage,
+    )
+
+    IfcStore.add_element_listener(wall.element_listener)
+    ifcopenshell.api.add_pre_listener(
+        "geometry.add_representation", "BlenderBIM.DumbWall.EnsureSolid", wall.ensure_solid
+    )
+    ifcopenshell.api.add_post_listener(
+        "geometry.add_representation", "BlenderBIM.DumbWall.GenerateAxis", wall.generate_axis
+    )
+    ifcopenshell.api.add_post_listener(
+        "geometry.add_representation", "BlenderBIM.DumbWall.CalculateQuantities", wall.calculate_quantities
+    )
+    ifcopenshell.api.add_pre_listener(
+        "material.edit_layer", "BlenderBIM.DumbWall.RegenerateFromLayer", wall.DumbWallPlaner().regenerate_from_layer
+    )
+    ifcopenshell.api.add_pre_listener(
+        "type.assign_type", "BlenderBIM.DumbWall.RegenerateFromType", wall.DumbWallPlaner().regenerate_from_type
+    )
+
+    IfcStore.add_element_listener(slab.element_listener)
+    ifcopenshell.api.add_pre_listener(
+        "geometry.add_representation", "BlenderBIM.DumbSlab.EnsureSolid", slab.ensure_solid
+    )
+    ifcopenshell.api.add_post_listener(
+        "geometry.add_representation", "BlenderBIM.DumbSlab.GenerateFootprint", slab.generate_footprint
+    )
+    ifcopenshell.api.add_post_listener(
+        "geometry.add_representation", "BlenderBIM.DumbSlab.CalculateQuantities", slab.calculate_quantities
+    )
+    ifcopenshell.api.add_pre_listener(
+        "material.edit_layer", "BlenderBIM.DumbSlab.RegenerateFromLayer", slab.DumbSlabPlaner().regenerate_from_layer
+    )
+    ifcopenshell.api.add_pre_listener(
+        "type.assign_type", "BlenderBIM.DumbSlab.RegenerateFromType", slab.DumbSlabPlaner().regenerate_from_type
+    )
+
+    IfcStore.add_element_listener(column.element_listener)
+    ifcopenshell.api.add_pre_listener(
+        "geometry.add_representation", "BlenderBIM.DumbColumn.EnsureSolid", column.ensure_solid
+    )
+    ifcopenshell.api.add_post_listener(
+        "material.edit_profile",
+        "BlenderBIM.DumbColumn.RegenerateFromProfile",
+        column.DumbColumnRegenerator().regenerate_from_profile,
+    )
+    ifcopenshell.api.add_post_listener(
+        "type.assign_type",
+        "BlenderBIM.DumbColumn.RegenerateFromType",
+        column.DumbColumnRegenerator().regenerate_from_type,
+    )

src/blenderbim/blenderbim/bim/module/model/pie.py

@@ -116,7 +116,7 @@ class VIEW3D_MT_PIE_bim(bpy.types.Menu):
     def draw(self, context):
         pie = self.layout.menu_pie()
         pie.operator("bim.edit_object_placement")
-        pie.operator("bim.update_mesh_representation")
+        pie.operator("bim.update_representation")
         pie.operator("bim.pie_add_opening")
         pie.operator("bim.pie_update_container")
         pie.operator("bim.open_pie_class", text="Assign IFC Class")

src/blenderbim/blenderbim/bim/module/model/product.py

@@ -0,0 +1,117 @@
+import bpy
+import ifcopenshell
+import ifcopenshell.api
+import ifcopenshell.util.element
+import ifcopenshell.util.representation
+from . import wall, slab, column
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.pset.data import Data as PsetData
+from mathutils import Vector
+
+
+class AddTypeInstance(bpy.types.Operator):
+    bl_idname = "bim.add_type_instance"
+    bl_label = "Add Type Instance"
+    bl_options = {"REGISTER", "UNDO"}
+    ifc_class: bpy.props.StringProperty()
+    relating_type: bpy.props.IntProperty()
+
+    def execute(self, context):
+        tprops = context.scene.BIMTypeProperties
+        ifc_class = self.ifc_class or tprops.ifc_class
+        relating_type = self.relating_type or tprops.relating_type
+        if not ifc_class or not relating_type:
+            return {"FINISHED"}
+        self.file = IfcStore.get_file()
+        instance_class = ifcopenshell.util.type.get_applicable_entities(ifc_class, self.file.schema)[0]
+        if ifc_class == "IfcWallType":
+            obj = wall.DumbWallGenerator(self.file.by_id(int(relating_type))).generate()
+            if obj:
+                return {"FINISHED"}
+        elif ifc_class == "IfcSlabType":
+            obj = slab.DumbSlabGenerator(self.file.by_id(int(relating_type))).generate()
+            if obj:
+                return {"FINISHED"}
+        elif ifc_class == "IfcColumnType":
+            obj = column.DumbColumnGenerator(self.file.by_id(int(relating_type))).generate()
+            if obj:
+                return {"FINISHED"}
+        # A cube
+        verts = [
+            Vector((-1, -1, -1)),
+            Vector((-1, -1, 1)),
+            Vector((-1, 1, -1)),
+            Vector((-1, 1, 1)),
+            Vector((1, -1, -1)),
+            Vector((1, -1, 1)),
+            Vector((1, 1, -1)),
+            Vector((1, 1, 1)),
+        ]
+        edges = []
+        faces = [
+            [0, 2, 3, 1],
+            [2, 3, 7, 6],
+            [4, 5, 7, 6],
+            [0, 1, 5, 4],
+            [1, 3, 7, 5],
+            [0, 2, 6, 4],
+        ]
+        mesh = bpy.data.meshes.new(name="Instance")
+        mesh.from_pydata(verts, edges, faces)
+        obj = bpy.data.objects.new("Instance", mesh)
+        obj.location = context.scene.cursor.location
+        collection = bpy.context.view_layer.active_layer_collection.collection
+        collection.objects.link(obj)
+        collection_obj = bpy.data.objects.get(collection.name)
+        bpy.ops.bim.assign_class(obj=obj.name, ifc_class=instance_class)
+        bpy.ops.bim.assign_type(relating_type=int(tprops.relating_type), related_object=obj.name)
+        if collection_obj and collection_obj.BIMObjectProperties.ifc_definition_id:
+            obj.location[2] = collection_obj.location[2] - min([v[2] for v in obj.bound_box])
+        return {"FINISHED"}
+
+
+def generate_box(usecase_path, ifc_file, settings):
+    box_context = ifcopenshell.util.representation.get_context(ifc_file, "Model", "Box", "MODEL_VIEW")
+    if not box_context:
+        return
+    obj = settings["blender_object"]
+    if 0 in list(obj.dimensions):
+        return
+    product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+    old_box = ifcopenshell.util.representation.get_representation(product, "Model", "Box", "MODEL_VIEW")
+    if settings["context"].ContextType == "Model" and getattr(settings["context"], "ContextIdentifier") == "Body":
+        if old_box:
+            bpy.ops.bim.remove_representation(representation_id=old_box.id(), obj=obj.name)
+
+        new_settings = settings.copy()
+        new_settings["context"] = box_context
+        new_box = ifcopenshell.api.run(
+            "geometry.add_representation", ifc_file, should_run_listeners=False, **new_settings
+        )
+        ifcopenshell.api.run(
+            "geometry.assign_representation",
+            ifc_file,
+            should_run_listeners=False,
+            **{"product": product, "representation": new_box}
+        )
+
+def regenerate_profile_usage(usecase_path, ifc_file, settings):
+    elements = []
+    if ifc_file.schema == "IFC2X3":
+        for rel in ifc_file.get_inverse(settings["usage"]):
+            if not rel.is_a("IfcRelAssociatesMaterial"):
+                continue
+            for element in rel.RelatedObjects:
+                elements.append(element)
+    else:
+        for rel in settings["usage"].AssociatedTo:
+            for element in rel.RelatedObjects:
+                elements.append(element)
+
+    for element in elements:
+        obj = IfcStore.get_element(element.id())
+        if not obj:
+            continue
+        representation = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
+        if representation:
+            bpy.ops.bim.switch_representation(obj=obj.name, ifc_definition_id=representation.id(), should_reload=True)

src/blenderbim/blenderbim/bim/module/model/prop.py

@@ -0,0 +1,32 @@
+import bpy
+import ifcopenshell.util.type
+from blenderbim.bim.prop import StrProperty, Attribute
+from blenderbim.bim.ifc import IfcStore
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+relating_types_enum = []
+
+
+def purge():
+    global relating_types_enum
+    relating_types_enum = []
+
+def getRelatingTypes(self, context):
+    global relating_types_enum
+    if len(relating_types_enum) < 1:
+        elements = IfcStore.get_file().by_type("IfcWallType")
+        relating_types_enum.extend((str(e.id()), e.Name, "") for e in elements)
+    return relating_types_enum
+
+class BIMModelProperties(PropertyGroup):
+    relating_type: EnumProperty(items=getRelatingTypes, name="Relating Type")

src/blenderbim/blenderbim/bim/module/model/slab.py

@@ -1,46 +1,319 @@
 import bpy
-from bpy.types import Operator
-from bpy.props import FloatProperty
-from mathutils import Vector
+import bmesh
+import math
+import ifcopenshell
+import ifcopenshell.util.type
+import ifcopenshell.util.unit
+import ifcopenshell.util.element
+import mathutils.geometry
+import blenderbim.bim.handler
 from blenderbim.bim.ifc import IfcStore
+from math import pi, degrees
+from mathutils import Vector, Matrix
+from ifcopenshell.api.pset.data import Data as PsetData
+from ifcopenshell.api.material.data import Data as MaterialData
+from blenderbim.bim.module.geometry.helper import Helper
 
 
-def add_object(self, context):
-    verts = [
-        Vector((0, 0, 0)),
-        Vector((0, self.width, 0)),
-        Vector((self.length, self.width, 0)),
-        Vector((self.length, 0, 0)),
-    ]
-    edges = []
-    faces = [[0, 1, 2, 3]]
-
-    mesh = bpy.data.meshes.new(name="Dumb Slab")
-    mesh.from_pydata(verts, edges, faces)
-    obj = bpy.data.objects.new("Slab", mesh)
-    modifier = obj.modifiers.new("Slab Depth", "SOLIDIFY")
-    modifier.use_even_offset = True
-    modifier.offset = 1
-    modifier.thickness = self.depth
-    obj.name = "Slab"
-    context.view_layer.active_layer_collection.collection.objects.link(obj)
-    if IfcStore.get_file():
-        bpy.ops.bim.assign_class(obj=obj.name, ifc_class="IfcSlab", predefined_type="FLOOR")
-    obj.location = context.scene.cursor.location
+def element_listener(element, obj):
+    blenderbim.bim.handler.subscribe_to(obj, "mode", mode_callback)
 
 
-class BIM_OT_add_object(Operator):
-    bl_idname = "mesh.add_slab"
-    bl_label = "Dumb Slab"
-
-    length: FloatProperty(name="Length", default=2)
-    width: FloatProperty(name="Width", default=2)
-    depth: FloatProperty(name="Depth", default=0.2)
-
-    def execute(self, context):
-        add_object(self, context)
-        return {"FINISHED"}
+def mode_callback(obj, data):
+    for obj in bpy.context.selected_objects + [bpy.context.active_object]:
+        if (
+            obj.mode != "EDIT"
+            or not obj.data
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
+            or not bpy.context.scene.BIMProjectProperties.is_authoring
+        ):
+            return
+        product = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+        parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+        if not parametric or parametric["Engine"] != "BlenderBIM.DumbSlab":
+            return
+        IfcStore.edited_objs.add(obj)
+        modifier = [m for m in obj.modifiers if m.type == "SOLIDIFY"]
+        if modifier:
+            return
+        depth = obj.dimensions.z
+        bm = bmesh.from_edit_mesh(obj.data)
+        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
+        bm.faces.ensure_lookup_table()
+        non_bottom_faces = []
+        for face in bm.faces:
+            if face.normal.z > -0.9:
+                non_bottom_faces.append(face)
+            else:
+                face.normal_flip()
+        bmesh.ops.delete(bm, geom=non_bottom_faces, context="FACES")
+        bmesh.update_edit_mesh(obj.data)
+        bm.free()
+        modifier = obj.modifiers.new("Slab Depth", "SOLIDIFY")
+        modifier.use_even_offset = True
+        modifier.offset = 1
+        modifier.thickness = depth
 
 
-def add_object_button(self, context):
-    self.layout.operator(BIM_OT_add_object.bl_idname, icon="PLUGIN")
+def ensure_solid(usecase_path, ifc_file, settings):
+    product = ifc_file.by_id(settings["blender_object"].BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbSlab":
+        return
+    settings["ifc_representation_class"] = "IfcExtrudedAreaSolid/IfcArbitraryProfileDefWithVoids"
+
+
+def generate_footprint(usecase_path, ifc_file, settings):
+    footprint_context = ifcopenshell.util.representation.get_context(ifc_file, "Plan", "FootPrint", "SKETCH_VIEW")
+    if not footprint_context:
+        return
+    obj = settings["blender_object"]
+    product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbSlab":
+        return
+    old_footprint = ifcopenshell.util.representation.get_representation(product, "Plan", "FootPrint", "SKETCH_VIEW")
+    if settings["context"].ContextType == "Model" and getattr(settings["context"], "ContextIdentifier") == "Body":
+        if old_footprint:
+            bpy.ops.bim.remove_representation(representation_id=old_footprint.id(), obj=obj.name)
+
+        helper = Helper(ifc_file)
+        indices = helper.auto_detect_arbitrary_profile_with_voids_extruded_area_solid(settings["geometry"])
+
+        bm = bmesh.new()
+        bm.from_mesh(settings["geometry"])
+        bm.verts.ensure_lookup_table()
+        bm.edges.ensure_lookup_table()
+
+        profile_edges = []
+
+        def append_profile_edges(profile_edges, indices):
+            indices.append(indices[0]) # Close the loop
+            edge_vert_pairs = list(zip(indices, indices[1:]))
+            for p in edge_vert_pairs:
+                profile_edges.append(
+                    [e for e in bm.verts[p[0]].link_edges if e.other_vert(bm.verts[p[0]]).index == p[1]][0]
+                )
+
+        append_profile_edges(profile_edges, indices["profile"])
+        for inner_indices in indices["inner_curves"]:
+            append_profile_edges(profile_edges, inner_indices)
+
+        irrelevant_edges = [e for e in bm.edges if e not in profile_edges]
+        bmesh.ops.delete(bm, geom=irrelevant_edges, context="EDGES")
+        mesh = bpy.data.meshes.new("Temporary Footprint")
+        bm.to_mesh(mesh)
+        bm.free()
+
+        new_settings = settings.copy()
+        new_settings["context"] = footprint_context
+        new_settings["geometry"] = mesh
+        new_footprint = ifcopenshell.api.run(
+            "geometry.add_representation", ifc_file, should_run_listeners=False, **new_settings
+        )
+
+        ifcopenshell.api.run(
+            "geometry.assign_representation",
+            ifc_file,
+            should_run_listeners=False,
+            **{"product": product, "representation": new_footprint}
+        )
+        bpy.data.meshes.remove(mesh)
+
+
+def calculate_quantities(usecase_path, ifc_file, settings):
+    unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+    obj = settings["blender_object"]
+    product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbSlab":
+        return
+    qto = ifcopenshell.api.run(
+        "pset.add_qto", ifc_file, should_run_listeners=False, product=product, name="Qto_SlabBaseQuantities"
+    )
+    length = obj.dimensions[0] / unit_scale
+    width = obj.dimensions[1] / unit_scale
+    depth = obj.dimensions[2] / unit_scale
+
+    perimeter = 0
+    helper = Helper(ifc_file)
+    indices = helper.auto_detect_arbitrary_profile_with_voids_extruded_area_solid(settings["geometry"])
+
+    bm = bmesh.new()
+    bm.from_mesh(settings["geometry"])
+    bm.verts.ensure_lookup_table()
+
+    def calculate_profile_length(indices):
+        indices.append(indices[0]) # Close the loop
+        edge_vert_pairs = list(zip(indices, indices[1:]))
+        return sum([(bm.verts[p[1]].co - bm.verts[p[0]].co).length for p in edge_vert_pairs])
+
+    perimeter += calculate_profile_length(indices["profile"])
+    for inner_indices in indices["inner_curves"]:
+        perimeter += calculate_profile_length(inner_indices)
+
+    bm.free()
+
+    if product.HasOpenings:
+        # TODO: calculate gross / net
+        gross_area = 0
+        net_area = 0
+        gross_volume = 0
+        net_volume = 0
+    else:
+        bm = bmesh.new()
+        bm.from_object(obj, bpy.context.evaluated_depsgraph_get())
+        bm.faces.ensure_lookup_table()
+        gross_area = sum([f.calc_area() for f in bm.faces if f.normal.z > 0.9])
+        net_area = gross_area
+        gross_volume = bm.calc_volume()
+        net_volume = gross_volume
+        bm.free()
+
+    properties={
+        "Depth": round(depth, 2),
+        "Perimeter": round(perimeter, 2),
+        "GrossArea": round(gross_area, 2),
+        "NetArea": round(net_area, 2),
+        "GrossVolume": round(gross_volume, 2),
+        "NetVolume": round(net_volume, 2),
+    }
+
+    if round(obj.dimensions[0] * obj.dimensions[1] * obj.dimensions[2], 2) == round(gross_volume, 2):
+        properties.update({
+            "Length": round(length, 2),
+            "Width": round(width, 2),
+        })
+    else:
+        properties.update({
+            "Length": None,
+            "Width": None,
+        })
+
+    ifcopenshell.api.run( "pset.edit_qto", ifc_file, should_run_listeners=False, qto=qto, properties=properties)
+    PsetData.load(ifc_file, obj.BIMObjectProperties.ifc_definition_id)
+
+
+class DumbSlabGenerator:
+    def __init__(self, relating_type):
+        self.relating_type = relating_type
+
+    def generate(self):
+        self.file = IfcStore.get_file()
+        unit_scale = ifcopenshell.util.unit.calculate_unit_scale(IfcStore.get_file())
+        thicknesses = []
+        for rel in self.relating_type.HasAssociations:
+            if rel.is_a("IfcRelAssociatesMaterial"):
+                material = rel.RelatingMaterial
+                if material.is_a("IfcMaterialLayerSet"):
+                    thicknesses = [l.LayerThickness for l in material.MaterialLayers]
+                    break
+        if not thicknesses:
+            return
+
+        self.collection = bpy.context.view_layer.active_layer_collection.collection
+        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.depth = sum(thicknesses) * unit_scale
+        self.width = 3
+        self.length = 3
+        self.rotation = 0
+        self.location = Vector((0, 0, 0))
+        return self.derive_from_cursor()
+
+    def derive_from_cursor(self):
+        self.location = bpy.context.scene.cursor.location
+        return self.create_slab()
+
+    def create_slab(self):
+        verts = [
+            Vector((0, 0, 0)),
+            Vector((0, self.width, 0)),
+            Vector((self.length, self.width, 0)),
+            Vector((self.length, 0, 0)),
+        ]
+        edges = []
+        faces = [[0, 3, 2, 1]]
+
+        mesh = bpy.data.meshes.new(name="Dumb Slab")
+        mesh.from_pydata(verts, edges, faces)
+        obj = bpy.data.objects.new("Slab", mesh)
+        modifier = obj.modifiers.new("Slab Depth", "SOLIDIFY")
+        modifier.use_even_offset = True
+        modifier.offset = 1
+        modifier.thickness = self.depth
+        obj.name = "Slab"
+        obj.location = self.location
+        if self.collection_obj and self.collection_obj.BIMObjectProperties.ifc_definition_id:
+            obj.location[2] = self.collection_obj.location[2] - self.depth
+        else:
+            obj.location[2] -= self.depth
+        self.collection.objects.link(obj)
+        bpy.ops.bim.assign_class(
+            obj=obj.name,
+            ifc_class="IfcSlab",
+            predefined_type="FLOOR",
+            ifc_representation_class="IfcExtrudedAreaSolid/IfcArbitraryProfileDefWithVoids",
+        )
+        bpy.ops.bim.assign_type(relating_type=self.relating_type.id(), related_object=obj.name)
+        element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+        pset = ifcopenshell.api.run("pset.add_pset", self.file, product=element, name="EPset_Parametric")
+        ifcopenshell.api.run("pset.edit_pset", self.file, pset=pset, properties={"Engine": "BlenderBIM.DumbSlab"})
+        MaterialData.load(self.file)
+        obj.select_set(True)
+        return obj
+
+
+class DumbSlabPlaner:
+    def regenerate_from_layer(self, usecase_path, ifc_file, settings):
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        layer = settings["layer"]
+        thickness = settings["attributes"].get("LayerThickness")
+        if thickness is None:
+            return
+        for layer_set in layer.ToMaterialLayerSet:
+            total_thickness = sum([l.LayerThickness for l in layer_set.MaterialLayers])
+            if not total_thickness:
+                continue
+            for inverse in ifc_file.get_inverse(layer_set):
+                if not inverse.is_a("IfcMaterialLayerSetUsage"):
+                    continue
+                if ifc_file.schema == "IFC2X3":
+                    for rel in ifc_file.get_inverse(inverse):
+                        if not rel.is_a("IfcRelAssociatesMaterial"):
+                            continue
+                        for element in rel.RelatedObjects:
+                            self.change_thickness(element, thickness)
+                else:
+                    for rel in inverse.AssociatedTo:
+                        for element in rel.RelatedObjects:
+                            self.change_thickness(element, thickness)
+
+    def regenerate_from_type(self, usecase_path, ifc_file, settings):
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        if not new_material or not new_material.is_a("IfcMaterialLayerSet"):
+            return
+        new_thickness = sum([l.LayerThickness for l in new_material.MaterialLayers])
+        self.change_thickness(settings["related_object"], new_thickness)
+
+    def change_thickness(self, element, thickness):
+        parametric = ifcopenshell.util.element.get_psets(element).get("EPset_Parametric")
+        if not parametric or parametric["Engine"] != "BlenderBIM.DumbSlab":
+            return
+
+        obj = IfcStore.get_element(element.id())
+        if not obj:
+            return
+
+        delta_thickness = (thickness * self.unit_scale) - obj.dimensions.z
+        if round(delta_thickness, 2) == 0:
+            return
+
+        modifier = [m for m in obj.modifiers if m.type == "SOLIDIFY"]
+        if modifier:
+            modifier = modifier[0]
+        else:
+            pass
+        modifier.thickness += delta_thickness
+        obj.location[2] -= delta_thickness

src/blenderbim/blenderbim/bim/module/model/ui.py

@@ -0,0 +1,63 @@
+from bpy.types import Panel
+from blenderbim.bim.ifc import IfcStore
+
+
+class BIM_PT_authoring(Panel):
+    bl_idname = "BIM_PT_authoring"
+    bl_label = "Authoring"
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+    bl_category = "BlenderBIM"
+
+    def draw(self, context):
+        tprops = context.scene.BIMTypeProperties
+        col = self.layout.column(align=True)
+        col.prop(tprops, "ifc_class", text="", icon="FILE_VOLUME")
+        col.prop(tprops, "relating_type", text="", icon="FILE_3D")
+        col.operator("bim.add_type_instance", icon="ADD")
+
+
+class BIM_PT_authoring_architectural(Panel):
+    bl_label = "Architectural"
+    bl_idname = "BIM_PT_authoring_architectural"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+    bl_category = "BlenderBIM"
+    bl_parent_id = "BIM_PT_authoring"
+
+    def draw(self, context):
+        row = self.layout.row(align=True)
+        row.operator("bim.join_wall", icon="MOD_SKIN", text="T").join_type = "T"
+        row.operator("bim.join_wall", icon="MOD_SKIN", text="L").join_type = "L"
+        row.operator("bim.join_wall", icon="MOD_SKIN", text="V").join_type = "V"
+        row.operator("bim.join_wall", icon="X", text="").join_type = ""
+        row = self.layout.row(align=True)
+        row.operator("bim.align_wall", icon="ANCHOR_TOP", text="Ext.").align_type = "EXTERIOR"
+        row.operator("bim.align_wall", icon="ANCHOR_CENTER", text="C/L").align_type = "CENTERLINE"
+        row.operator("bim.align_wall", icon="ANCHOR_BOTTOM", text="Int.").align_type = "INTERIOR"
+        row = self.layout.row(align=True)
+        row.operator("bim.flip_wall", icon="ORIENTATION_NORMAL", text="Flip")
+        row.operator("bim.split_wall", icon="MOD_PHYSICS", text="Split")
+
+
+class BIM_PT_misc_utilities(Panel):
+    bl_idname = "BIM_PT_misc_utilities"
+    bl_label = "Miscellaneous"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+    bl_category = "BlenderBIM"
+
+    def draw(self, context):
+        layout = self.layout
+        props = context.scene.BIMProperties
+
+        row = layout.row()
+        row.prop(props, "override_colour", text="")
+        row = layout.row(align=True)
+        row.operator("bim.set_override_colour")
+        row = layout.row(align=True)
+        row.operator("bim.set_viewport_shadow_from_sun")
+        row = layout.row(align=True)
+        row.operator("bim.snap_spaces_together")

src/blenderbim/blenderbim/bim/module/model/wall.py

@@ -1,64 +1,911 @@
 import bpy
-from bpy.types import Operator
-from bpy.props import FloatProperty, BoolProperty
-from mathutils import Vector
+import math
+import bmesh
+import ifcopenshell
+import ifcopenshell.api
+import ifcopenshell.util.unit
+import ifcopenshell.util.element
+import ifcopenshell.util.representation
+import mathutils.geometry
+import blenderbim.bim.handler
 from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.pset.data import Data as PsetData
+from ifcopenshell.api.material.data import Data as MaterialData
+from math import pi, degrees
+from mathutils import Vector, Matrix
 
 
-def add_object(self, context):
-    if self.use_plane:
-        verts = [
-            Vector((0, 0, 0)),
-            Vector((0, 0, self.height)),
-            Vector((self.length, 0, self.height)),
-            Vector((self.length, 0, 0)),
-        ]
-        edges = []
-        faces = [[0, 1, 2, 3]]
-    else:
-        verts = [
-            Vector((0, 0, 0)),
-            Vector((self.length, 0, 0)),
-        ]
-        edges = [[0, 1]]
-        faces = []
-
-    mesh = bpy.data.meshes.new(name="Dumb Wall")
-    mesh.from_pydata(verts, edges, faces)
-    obj = bpy.data.objects.new("Wall", mesh)
-    context.view_layer.active_layer_collection.collection.objects.link(obj)
-    if not self.use_plane:
-        modifier = obj.modifiers.new("Wall Height", "SCREW")
-        modifier.angle = 0
-        modifier.screw_offset = self.height
-        modifier.use_smooth_shade = False
-        modifier.use_normal_calculate = True
-        modifier.use_normal_flip = True
-        modifier.steps = 1
-        modifier.render_steps = 1
-    modifier = obj.modifiers.new("Wall Width", "SOLIDIFY")
-    modifier.use_even_offset = True
-    modifier.thickness = self.width
-    obj.name = "Wall"
-    if IfcStore.get_file():
-        bpy.ops.bim.assign_class(obj=obj.name, ifc_class="IfcWall")
-    obj.location = context.scene.cursor.location
-    return obj
+def element_listener(element, obj):
+    blenderbim.bim.handler.subscribe_to(obj, "mode", mode_callback)
 
 
-class BIM_OT_add_object(Operator):
-    bl_idname = "mesh.add_wall"
-    bl_label = "Dumb Wall"
+def mode_callback(obj, data):
+    for obj in bpy.context.selected_objects + [bpy.context.active_object]:
+        if (
+            obj.mode != "EDIT"
+            or not obj.data
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
+            or not bpy.context.scene.BIMProjectProperties.is_authoring
+        ):
+            return
+        product = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+        parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+        if not parametric or parametric["Engine"] != "BlenderBIM.DumbWall":
+            return
+        IfcStore.edited_objs.add(obj)
 
-    height: FloatProperty(name="Height", default=3)
-    length: FloatProperty(name="Length", default=1)
-    width: FloatProperty(name="Width", default=0.2)
-    use_plane: BoolProperty(name="Use Plane", default=False)
+
+class AddWall(bpy.types.Operator):
+    bl_idname = "bim.add_wall"
+    bl_label = "Add Wall"
+    bl_options = {"REGISTER", "UNDO"}
+    join_type: bpy.props.StringProperty()
 
     def execute(self, context):
-        add_object(self, context)
+        props = context.scene.BIMModelProperties
+        bpy.ops.bim.add_type_instance(ifc_class="IfcWallType", relating_type=int(props.relating_type))
         return {"FINISHED"}
 
 
-def add_object_button(self, context):
-    self.layout.operator(BIM_OT_add_object.bl_idname, icon="PLUGIN")
+class JoinWall(bpy.types.Operator):
+    bl_idname = "bim.join_wall"
+    bl_label = "Join Wall"
+    bl_options = {"REGISTER", "UNDO"}
+    join_type: bpy.props.StringProperty()
+
+    def execute(self, context):
+        selected_objs = context.selected_objects
+        if len(selected_objs) == 0:
+            return {"FINISHED"}
+        if not self.join_type:
+            for obj in selected_objs:
+                DumbWallJoiner(obj, obj).unjoin()
+            return {"FINISHED"}
+        if len(selected_objs) < 2 or not context.active_object:
+            return {"FINISHED"}
+        for obj in selected_objs:
+            if obj == context.active_object:
+                continue
+            joiner = DumbWallJoiner(obj, context.active_object)
+            if self.join_type == "T":
+                joiner.join_T()
+            elif self.join_type == "L":
+                joiner.join_L()
+            elif self.join_type == "V":
+                joiner.join_V()
+            IfcStore.edited_objs.add(obj)
+        if self.join_type != "T":
+            IfcStore.edited_objs.add(context.active_object)
+        return {"FINISHED"}
+
+
+class AlignWall(bpy.types.Operator):
+    bl_idname = "bim.align_wall"
+    bl_label = "Align Wall"
+    bl_options = {"REGISTER", "UNDO"}
+    align_type: bpy.props.StringProperty()
+
+    def execute(self, context):
+        selected_objs = context.selected_objects
+        if len(selected_objs) < 2 or not context.active_object:
+            return {"FINISHED"}
+        for obj in selected_objs:
+            if obj == context.active_object:
+                continue
+            aligner = DumbWallAligner(obj, context.active_object)
+            if self.align_type == "CENTERLINE":
+                aligner.align_centerline()
+            elif self.align_type == "EXTERIOR":
+                aligner.align_first_layer()
+            elif self.align_type == "INTERIOR":
+                aligner.align_last_layer()
+            IfcStore.edited_objs.add(obj)
+        return {"FINISHED"}
+
+
+class FlipWall(bpy.types.Operator):
+    bl_idname = "bim.flip_wall"
+    bl_label = "Flip Wall"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        selected_objs = context.selected_objects
+        if len(selected_objs) == 0:
+            return {"FINISHED"}
+        for obj in selected_objs:
+            DumbWallFlipper(obj).flip()
+            IfcStore.edited_objs.add(obj)
+        return {"FINISHED"}
+
+
+class SplitWall(bpy.types.Operator):
+    bl_idname = "bim.split_wall"
+    bl_label = "Split Wall"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        selected_objs = context.selected_objects
+        if len(selected_objs) == 0:
+            return {"FINISHED"}
+        for obj in selected_objs:
+            DumbWallSplitter(obj, bpy.context.scene.cursor.location).split()
+            IfcStore.edited_objs.add(obj)
+        return {"FINISHED"}
+
+
+def recalculate_dumb_wall_origin(wall, new_origin=None):
+    if new_origin is None:
+        new_origin = wall.matrix_world @ Vector(wall.bound_box[0])
+    if (wall.matrix_world.translation - new_origin).length < 0.001:
+        return
+    wall.data.transform(
+        Matrix.Translation(
+            (wall.matrix_world.inverted().to_quaternion() @ (wall.matrix_world.translation - new_origin))
+        )
+    )
+    wall.matrix_world.translation = new_origin
+
+
+class DumbWallSplitter:
+    def __init__(self, wall, point):
+        self.wall = wall
+        self.point = point
+
+    def split(self):
+        recalculate_dumb_wall_origin(self.wall)
+        self.point = self.determine_split_point()
+        if not self.point:
+            return
+        new_wall = self.duplicate_wall()
+        self.snap_end_face_to_point(self.wall, "max")
+        self.snap_end_face_to_point(new_wall, "min")
+
+    def determine_split_point(self):
+        start = self.wall.matrix_world @ Vector(self.wall.bound_box[0])
+        end = self.wall.matrix_world @ Vector(self.wall.bound_box[4])
+        point, distance = mathutils.geometry.intersect_point_line(self.point, start, end)
+        if round(distance, 2) <= 0 or round(distance, 2) >= 1:
+            return  # The split point is not on the wall
+        return point
+
+    def duplicate_wall(self):
+        new = self.wall.copy()
+        self.wall.users_collection[0].objects.link(new)
+        bpy.ops.bim.copy_class(obj=new.name)
+        return new
+
+    def snap_end_face_to_point(self, wall, which_end):
+        bm = bmesh.new()
+        bm.from_mesh(wall.data)
+        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
+        min_face, max_face = self.get_wall_end_faces(wall, bm)
+        face = min_face if which_end == "min" else max_face
+        local_point = wall.matrix_world.inverted() @ self.point
+        for vert in face.verts:
+            vert.co.x = local_point.x
+        bm.to_mesh(wall.data)
+        wall.data.update()
+        bm.free()
+        IfcStore.edited_objs.add(wall)
+
+    # An end face is a quad that is on one end of the wall or the other. It must
+    # have at least one vertex on either extreme X-axis, and a non-insignificant
+    # X component of its face normal
+    def get_wall_end_faces(self, wall, bm):
+        min_face = None
+        max_face = None
+        min_x = min([v[0] for v in wall.bound_box])
+        max_x = max([v[0] for v in wall.bound_box])
+        bm.faces.ensure_lookup_table()
+        for f in bm.faces:
+            for v in f.verts:
+                if v.co.x == min_x and abs(f.normal.x) > 0.1:
+                    min_face = f
+                elif v.co.x == max_x and abs(f.normal.x) > 0.1:
+                    max_face = f
+            if min_face and max_face:
+                break
+        return min_face, max_face
+
+
+class DumbWallFlipper:
+    # A flip switches the origin from the min XY corner to the max XY corner, and rotates the origin by 180.
+    def __init__(self, wall):
+        self.wall = wall
+
+    def flip(self):
+        if (
+            self.wall.matrix_world.translation - self.wall.matrix_world @ Vector(self.wall.bound_box[0])
+        ).length < 0.001:
+            recalculate_dumb_wall_origin(self.wall, self.wall.matrix_world @ Vector(self.wall.bound_box[7]))
+            self.rotate_wall_180()
+        else:
+            recalculate_dumb_wall_origin(self.wall)
+
+    def rotate_wall_180(self):
+        flip_matrix = Matrix.Rotation(pi, 4, "Z")
+        self.wall.data.transform(flip_matrix)
+        self.wall.rotation_euler.rotate(flip_matrix)
+
+
+class DumbWallAligner:
+    # An alignment shifts the origin of all walls to the closest point on the
+    # local X axis of the reference wall. In addition, the Z rotation is copied.
+    # Z translations are ignored for alignment.
+    def __init__(self, wall, reference_wall):
+        self.wall = wall
+        self.reference_wall = reference_wall
+
+    def align_centerline(self):
+        recalculate_dumb_wall_origin(self.wall)
+        recalculate_dumb_wall_origin(self.reference_wall)
+        self.align_rotation()
+
+        width = (Vector(self.wall.bound_box[3]) - Vector(self.wall.bound_box[0])).y
+        reference_width = (Vector(self.reference_wall.bound_box[3]) - Vector(self.reference_wall.bound_box[0])).y
+
+        if self.is_rotation_flipped():
+            offset = self.wall.matrix_world.to_quaternion() @ Vector((0, -(reference_width / 2) - (width / 2), 0))
+        else:
+            offset = self.wall.matrix_world.to_quaternion() @ Vector((0, (reference_width / 2) - (width / 2), 0))
+
+        self.align(
+            self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[0]),
+            self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[4]),
+            offset,
+        )
+
+    def align_last_layer(self):
+        recalculate_dumb_wall_origin(self.wall)
+        recalculate_dumb_wall_origin(self.reference_wall)
+        self.align_rotation()
+
+        if self.is_rotation_flipped():
+            DumbWallFlipper(self.wall).flip()
+            bpy.context.view_layer.update()
+        start = self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[3])
+        end = self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[7])
+
+        wall_width = (Vector(self.wall.bound_box[3]) - Vector(self.wall.bound_box[0])).y
+
+        offset = self.wall.matrix_world.to_quaternion() @ Vector((0, -wall_width, 0))
+        self.align(start, end, offset)
+
+    def align_first_layer(self):
+        recalculate_dumb_wall_origin(self.wall)
+        recalculate_dumb_wall_origin(self.reference_wall)
+        self.align_rotation()
+
+        if self.is_rotation_flipped():
+            DumbWallFlipper(self.wall).flip()
+            bpy.context.view_layer.update()
+
+        start = self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[0])
+        end = self.reference_wall.matrix_world @ Vector(self.reference_wall.bound_box[4])
+
+        self.align(start, end)
+
+    def align(self, start, end, offset=None):
+        if offset is None:
+            offset = Vector((0, 0, 0))
+        point, distance = mathutils.geometry.intersect_point_line(self.wall.matrix_world.translation, start, end)
+        new_origin = point + offset
+        self.wall.matrix_world.translation[0] = new_origin[0]
+        self.wall.matrix_world.translation[1] = new_origin[1]
+
+    def align_rotation(self):
+        reference = (self.reference_wall.matrix_world.to_quaternion() @ Vector((1, 0, 0))).to_2d()
+        wall = (self.wall.matrix_world.to_quaternion() @ Vector((1, 0, 0))).to_2d()
+        angle = reference.angle_signed(wall)
+        if round(degrees(angle) % 360) in (0, 180):
+            return
+        elif angle > (pi / 2):
+            self.wall.rotation_euler[2] -= pi - angle
+        else:
+            self.wall.rotation_euler[2] += angle
+        bpy.context.view_layer.update()
+
+    def is_rotation_flipped(self):
+        reference = (self.reference_wall.matrix_world.to_quaternion() @ Vector((1, 0, 0))).to_2d()
+        wall = (self.wall.matrix_world.to_quaternion() @ Vector((1, 0, 0))).to_2d()
+        angle = reference.angle_signed(wall)
+        return round(degrees(angle) % 360) == 180
+
+
+class DumbWallJoiner:
+    # A dumb wall is a prismatic wall along its local X axis.
+    # Given two dumb walls, there are three types of wall joints.
+    #  1. T-junction joints
+    #  2. L-junction "butt" joints
+    #  3. V-junction "mitre" joints
+    # The algorithms that handle all joints rely on three fundamental functions.
+    #  1. Identify faces at either end of the wall, called "end faces".
+    #  2. Given an "end face", identify a side "target face" of the other wall
+    #     to project towards.
+    #  3. Project the vertices of an "end face" to the "target face".
+    def __init__(self, wall1, wall2):
+        self.wall1 = wall1
+        self.wall2 = wall2
+        self.should_project_to_frontface = True
+        self.should_attempt_v_junction_projection = False
+        self.initialise_convenience_variables()
+
+    def initialise_convenience_variables(self):
+        self.wall1_matrix = self.wall1.matrix_world
+        self.wall2_matrix = self.wall2.matrix_world
+        self.pos_x = self.wall1_matrix.to_quaternion() @ Vector((1, 0, 0))
+        self.neg_x = self.wall1_matrix.to_quaternion() @ Vector((-1, 0, 0))
+
+    # Unjoining a wall geometrically means to flatten the ends of the wall to
+    # remove any mitred angle from it.
+    def unjoin(self):
+        wall1_min_faces, wall1_max_faces = self.get_wall_end_faces(self.wall1)
+        min_x = min([v[0] for v in self.wall1.bound_box])
+        max_x = max([v[0] for v in self.wall1.bound_box])
+        for face in wall1_min_faces:
+            for v in face.vertices:
+                self.wall1.data.vertices[v].co[0] = min_x
+        for face in wall1_max_faces:
+            for v in face.vertices:
+                self.wall1.data.vertices[v].co[0] = max_x
+        self.recalculate_origins()
+
+    # A T-junction is an ordered operation where a single end of wall1 is joined
+    # to wall2 if possible (i.e. walls aren't parallel). Wall2 is not modified.
+    # First, wall1 end faces are identified. We attempt to project an end face
+    # at both ends to a front face of wall2. We then choose the end face that
+    # has the shortest projection distance, and project it.
+    def join_T(self):
+        self._join_T()
+        self.recalculate_origins()
+
+    def _join_T(self):
+        wall1_min_faces, wall1_max_faces = self.get_wall_end_faces(self.wall1)
+        wall2_end_faces1, wall2_end_faces2 = self.get_wall_end_faces(self.wall2)
+        self.wall2_end_faces = wall2_end_faces1 + wall2_end_faces2
+        ef1_distance, ef1_target_frontface, ef1_target_backface = self.get_projection_target(wall1_min_faces, 1)
+        ef2_distance, ef2_target_frontface, ef2_target_backface = self.get_projection_target(wall1_max_faces, 2)
+
+        # Large distances probably means rounding issues which lead to very long projections
+        if ef1_distance and ef1_distance > 50:
+            ef1_distance = None
+        if ef2_distance and ef2_distance > 50:
+            ef2_distance = None
+
+        # Project only the end faces that are closer to their target
+        if ef1_distance and ef2_distance is None:
+            self.project_end_faces(wall1_min_faces, ef1_target_frontface, ef1_target_backface)
+            return (wall1_min_faces, ef1_target_frontface, ef1_target_backface)
+        elif ef2_distance and ef1_distance is None:
+            self.project_end_faces(wall1_max_faces, ef2_target_frontface, ef2_target_backface)
+            return (wall1_max_faces, ef2_target_frontface, ef2_target_backface)
+        elif ef1_distance is None and ef2_distance is None:
+            return (None, None, None)  # Life is short. BIM is hard.
+        elif ef1_distance < ef2_distance:
+            self.project_end_faces(wall1_min_faces, ef1_target_frontface, ef1_target_backface)
+            return (wall1_min_faces, ef1_target_frontface, ef1_target_backface)
+        else:
+            self.project_end_faces(wall1_max_faces, ef2_target_frontface, ef2_target_backface)
+            return (wall1_max_faces, ef2_target_frontface, ef2_target_backface)
+
+    # An L-junction is ordered operation where a single end of wall1 is joined
+    # to the backface of a side of wall2, and then a single end of wall2 is
+    # joined back to wall1 as a regular T-junction.
+    def join_L(self):
+        self.should_project_to_frontface = False
+        self._join_T()
+        self.swap_walls()
+        self.should_project_to_frontface = True
+        self._join_T()
+        self.recalculate_origins()
+
+    # A V-junction is an unordered operation where wall1 is joined to wall2,
+    # then vice versa. First, we do a T-junction from wall1 to wall2, then vice
+    # versa. This creates a junction where the inner vertices of the mitre joint
+    # touches, but the outer vertices do not. So, we just loop through the end
+    # point vertices of each wall, find outer vertices (i.e. vertices that don't
+    # touch the other wall), then continue projecting those to the back face of
+    # the other wall.
+    def join_V(self):
+        wall2_end_faces, wall2_target_frontface, wall2_target_backface = self._join_T()
+        self.swap_walls()
+        wall1_end_faces, wall1_target_frontface, wall1_target_backface = self._join_T()
+
+        for face in wall1_end_faces or []:
+            for v in face.vertices:
+                global_co = self.wall1_matrix @ self.wall1.data.vertices[v].co
+                if self.wall2.closest_point_on_mesh(self.wall2_matrix.inverted() @ global_co, distance=0.001)[0]:
+                    continue  # Vertex is already coincident with other wall, do not mitre
+                target_face_center = self.wall2_matrix @ wall1_target_backface.center
+                target_face_normal = (self.wall2_matrix.to_quaternion() @ wall1_target_backface.normal).normalized()
+                self.project_vertex(v, target_face_center, target_face_normal, self.wall1, self.wall1_matrix)
+
+        self.swap_walls()
+
+        for face in wall2_end_faces or []:
+            for v in face.vertices:
+                global_co = self.wall1_matrix @ self.wall1.data.vertices[v].co
+                if self.wall2.closest_point_on_mesh(self.wall2_matrix.inverted() @ global_co, distance=0.001)[0]:
+                    continue  # Vertex is already coincident with other wall, do not mitre
+                target_face_center = self.wall2_matrix @ wall2_target_backface.center
+                target_face_normal = (self.wall2_matrix.to_quaternion() @ wall2_target_backface.normal).normalized()
+                self.project_vertex(v, target_face_center, target_face_normal, self.wall1, self.wall1_matrix)
+        self.recalculate_origins()
+
+    def recalculate_origins(self):
+        bpy.context.view_layer.update()
+        recalculate_dumb_wall_origin(self.wall1)
+        recalculate_dumb_wall_origin(self.wall2)
+
+    def swap_walls(self):
+        self.wall1, self.wall2 = self.wall2, self.wall1
+        self.initialise_convenience_variables()
+
+    def project_end_faces(self, end_faces, target_frontface, target_backface):
+        target_face = target_frontface if self.should_project_to_frontface else target_backface
+        target_face_center = self.wall2_matrix @ target_face.center
+        target_face_normal = (self.wall2_matrix.to_quaternion() @ target_face.normal).normalized()
+
+        for end_face in end_faces:
+            for v in end_face.vertices:
+                self.project_vertex(v, target_face_center, target_face_normal, self.wall1, self.wall1_matrix)
+
+    def project_vertex(self, v, target_face_center, target_face_normal, wall, wall_matrix):
+        original_point = wall_matrix @ wall.data.vertices[v].co
+        point = mathutils.geometry.intersect_line_plane(
+            original_point,
+            (original_point) + self.pos_x,
+            target_face_center,
+            target_face_normal,
+        )
+        if not point or (point - original_point).length > 50:
+            return
+        local_point = wall_matrix.inverted() @ point
+        wall.data.vertices[v].co = local_point
+
+    # A projection target face is a side face on the target wall that has a
+    # significant local Y component to its normal (i.e. is not pointing up or
+    # down or something). In addition, its plane must intersect with the
+    # projection vector of an end face. Finally, the projection vector and the
+    # normal of the target face must not be acute.
+    def get_projection_target(self, end_faces, which_end):
+        if not end_faces:
+            return (None, None, None)
+
+        # Get a single end face as a sample.
+        f1 = end_faces[0]
+        f1_center = self.wall1_matrix @ f1.center
+
+        if which_end == 1:
+            outwards = self.neg_x
+            inwards = self.pos_x
+        elif which_end == 2:
+            outwards = self.pos_x
+            inwards = self.neg_x
+
+        distance = None
+        target_frontface = None
+        target_backface = None
+
+        for f2 in self.wall2.data.polygons:
+            if abs(f2.normal.y) < 0.75:
+                continue  # Probably not a side wall
+            if f2 in self.wall2_end_faces:
+                continue
+            # Can we project the end face to the target face?
+            f2_center = self.wall2_matrix @ f2.center
+            f1_center_offset_x = f1_center + outwards
+            f2_normal = (self.wall2_matrix.to_quaternion() @ f2.normal).normalized()
+            point = mathutils.geometry.intersect_line_plane(
+                f1_center,
+                f1_center_offset_x,
+                f2_center,
+                f2_normal,
+            )
+            if not point:
+                continue  # We can't project to the face at all
+            intersection_point, signed_distance = mathutils.geometry.intersect_point_line(
+                point, f1_center, f1_center_offset_x
+            )
+            raycast_direction = outwards if signed_distance > 0 else inwards
+
+            if raycast_direction == outwards and f2_normal.angle(raycast_direction) < math.pi / 2:
+                target_backface = f2  # f2 is on the wrong side of the wall
+            elif raycast_direction == inwards and f2_normal.angle(raycast_direction) > math.pi / 2:
+                target_backface = f2  # f2 is on the wrong side of the wall
+            else:
+                target_frontface = f2
+
+            distance = (point - f1_center).length
+
+            if distance is not None and target_frontface is not None and target_backface is not None:
+                return (distance, target_frontface, target_backface)
+        return (None, None, None)
+
+    # An end face is a set of faces that represents either one end of the wall or
+    # the other. There is typically only 1 quad or 2 tris for each end.
+    # An end face is defined as having at least one vertex on either extreme
+    # X-axis, and a non-insignificant X component of its face normal
+    def get_wall_end_faces(self, wall):
+        min_faces = []
+        max_faces = []
+        min_x = min([v[0] for v in wall.bound_box])
+        max_x = max([v[0] for v in wall.bound_box])
+        for f in wall.data.polygons:
+            end_face_index = self.get_wall_face_end(wall, f, min_x, max_x)
+            if end_face_index == 1:
+                min_faces.append(f)
+            elif end_face_index == 2:
+                max_faces.append(f)
+        return (min_faces, max_faces)
+
+    # 1 is the leftmost (minimum local X axis) end, and 2 is the rightmost end
+    def get_wall_face_end(self, wall, face, min_x, max_x):
+        for v in face.vertices:
+            if wall.data.vertices[v].co.x == min_x and abs(face.normal.x) > 0.1:
+                return 1
+            if wall.data.vertices[v].co.x == max_x and abs(face.normal.x) > 0.1:
+                return 2
+
+
+class DumbWallGenerator:
+    def __init__(self, relating_type):
+        self.relating_type = relating_type
+
+    def generate(self):
+        self.file = IfcStore.get_file()
+        unit_scale = ifcopenshell.util.unit.calculate_unit_scale(IfcStore.get_file())
+        thicknesses = []
+        for rel in self.relating_type.HasAssociations:
+            if rel.is_a("IfcRelAssociatesMaterial"):
+                material = rel.RelatingMaterial
+                if material.is_a("IfcMaterialLayerSet"):
+                    thicknesses = [l.LayerThickness for l in material.MaterialLayers]
+                    break
+        if not thicknesses:
+            return
+
+        self.collection = bpy.context.view_layer.active_layer_collection.collection
+        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.width = sum(thicknesses) * unit_scale
+        self.height = 3
+        self.length = 1
+        self.rotation = 0
+        self.location = Vector((0, 0, 0))
+
+        if self.has_sketch():
+            return self.derive_from_sketch()
+        return self.derive_from_cursor()
+
+    def has_sketch(self):
+        return (
+            bpy.context.scene.grease_pencil
+            and len(bpy.context.scene.grease_pencil.layers) == 1
+            and bpy.context.scene.grease_pencil.layers[0].active_frame.strokes
+        )
+
+    def derive_from_sketch(self):
+        objs = []
+        strokes = []
+        layer = bpy.context.scene.grease_pencil.layers[0]
+
+        for stroke in layer.active_frame.strokes:
+            if len(stroke.points) == 1:
+                continue
+            coords = (stroke.points[0].co, stroke.points[-1].co)
+            direction = coords[1] - coords[0]
+            length = direction.length
+            if length < 0.1:
+                continue
+            data = {"coords": coords}
+
+            # Round to nearest 50mm (yes, metric for now)
+            self.length = 0.05 * round(length / 0.05)
+            self.rotation = math.atan2(direction[1], direction[0])
+            # Round to nearest 5 degrees
+            nearest_degree = (math.pi / 180) * 5
+            self.rotation = nearest_degree * round(self.rotation / nearest_degree)
+            self.location = coords[0]
+            data["obj"] = self.create_wall()
+            strokes.append(data)
+            objs.append(data["obj"])
+
+        if len(objs) < 2:
+            return objs
+
+        l_joins = set()
+        for stroke in strokes:
+            if not stroke["obj"]:
+                continue
+            for stroke2 in strokes:
+                if stroke2 == stroke or not stroke2["obj"]:
+                    continue
+                if self.has_nearby_ends(stroke, stroke2):
+                    wall_join = "-JOIN-".join(sorted([stroke["obj"].name, stroke2["obj"].name]))
+                    if wall_join not in l_joins:
+                        l_joins.add(wall_join)
+                        DumbWallJoiner(stroke["obj"], stroke2["obj"]).join_L()
+                elif self.has_end_near_stroke(stroke, stroke2):
+                    DumbWallJoiner(stroke["obj"], stroke2["obj"]).join_T()
+        bpy.context.scene.grease_pencil.layers.remove(layer)
+        return objs
+
+    def has_end_near_stroke(self, stroke, stroke2):
+        point, distance = mathutils.geometry.intersect_point_line(stroke["coords"][0], *stroke2["coords"])
+        if distance > 0 and distance < 1 and self.is_near(point, stroke["coords"][0]):
+            return True
+        point, distance = mathutils.geometry.intersect_point_line(stroke["coords"][1], *stroke2["coords"])
+        if distance > 0 and distance < 1 and self.is_near(point, stroke["coords"][1]):
+            return True
+
+    def has_nearby_ends(self, stroke, stroke2):
+        return (
+            self.is_near(stroke["coords"][0], stroke2["coords"][0])
+            or self.is_near(stroke["coords"][0], stroke2["coords"][1])
+            or self.is_near(stroke["coords"][1], stroke2["coords"][0])
+            or self.is_near(stroke["coords"][1], stroke2["coords"][1])
+        )
+
+    def is_near(self, point1, point2):
+        return (point1 - point2).length < 0.1
+
+    def derive_from_cursor(self):
+        self.location = bpy.context.scene.cursor.location
+        if self.collection:
+            for sibling_obj in self.collection.objects:
+                if not isinstance(sibling_obj.data, bpy.types.Mesh):
+                    continue
+                if "IfcWall" not in sibling_obj.name:
+                    continue
+                local_location = sibling_obj.matrix_world.inverted() @ self.location
+                raycast = sibling_obj.closest_point_on_mesh(local_location, distance=0.01)
+                if not raycast[0]:
+                    continue
+                for face in sibling_obj.data.polygons:
+                    if (
+                        abs(face.normal.y) >= 0.75
+                        and abs(mathutils.geometry.distance_point_to_plane(local_location, face.center, face.normal))
+                        < 0.01
+                    ):
+                        # Rotate the wall in the direction of the face normal
+                        normal = (sibling_obj.matrix_world.to_quaternion() @ face.normal).normalized()
+                        self.rotation = math.atan2(normal[1], normal[0])
+                        break
+        return self.create_wall()
+
+    def create_wall(self):
+        verts = [
+            Vector((0, self.width, 0)),
+            Vector((0, 0, 0)),
+            Vector((0, self.width, self.height)),
+            Vector((0, 0, self.height)),
+            Vector((self.length, self.width, 0)),
+            Vector((self.length, 0, 0)),
+            Vector((self.length, self.width, self.height)),
+            Vector((self.length, 0, self.height)),
+        ]
+        faces = [
+            [1, 3, 2, 0],
+            [4, 6, 7, 5],
+            [1, 0, 4, 5],
+            [3, 7, 6, 2],
+            [0, 2, 6, 4],
+            [1, 5, 7, 3],
+        ]
+        mesh = bpy.data.meshes.new(name="Wall")
+        mesh.from_pydata(verts, [], faces)
+        obj = bpy.data.objects.new("Wall", mesh)
+        obj.location = self.location
+        obj.rotation_euler[2] = self.rotation
+        if self.collection_obj and self.collection_obj.BIMObjectProperties.ifc_definition_id:
+            obj.location[2] = self.collection_obj.location[2]
+        self.collection.objects.link(obj)
+        bpy.ops.bim.assign_class(
+            obj=obj.name,
+            ifc_class="IfcWall",
+            ifc_representation_class="IfcExtrudedAreaSolid/IfcArbitraryClosedProfileDef",
+        )
+        bpy.ops.bim.assign_type(relating_type=self.relating_type.id(), related_object=obj.name)
+        element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+        pset = ifcopenshell.api.run("pset.add_pset", self.file, product=element, name="EPset_Parametric")
+        ifcopenshell.api.run("pset.edit_pset", self.file, pset=pset, properties={"Engine": "BlenderBIM.DumbWall"})
+        MaterialData.load(self.file)
+        obj.select_set(True)
+        return obj
+
+
+def ensure_solid(usecase_path, ifc_file, settings):
+    product = ifc_file.by_id(settings["blender_object"].BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbWall":
+        return
+    settings["ifc_representation_class"] = "IfcExtrudedAreaSolid/IfcArbitraryClosedProfileDef"
+
+
+def generate_axis(usecase_path, ifc_file, settings):
+    axis_context = ifcopenshell.util.representation.get_context(ifc_file, "Model", "Axis", "GRAPH_VIEW")
+    if not axis_context:
+        return
+    obj = settings["blender_object"]
+    product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbWall":
+        return
+    old_axis = ifcopenshell.util.representation.get_representation(product, "Model", "Axis", "GRAPH_VIEW")
+    if settings["context"].ContextType == "Model" and getattr(settings["context"], "ContextIdentifier") == "Body":
+        if old_axis:
+            bpy.ops.bim.remove_representation(representation_id=old_axis.id(), obj=obj.name)
+
+        new_settings = settings.copy()
+        new_settings["context"] = axis_context
+
+        mesh = bpy.data.meshes.new("Temporary Axis")
+        start = Vector(obj.bound_box[0])
+        end = Vector(obj.bound_box[4])
+        mesh.from_pydata([start, end], [(0, 1)], [])
+
+        new_settings["geometry"] = mesh
+        new_axis = ifcopenshell.api.run(
+            "geometry.add_representation", ifc_file, should_run_listeners=False, **new_settings
+        )
+        ifcopenshell.api.run(
+            "geometry.assign_representation",
+            ifc_file,
+            should_run_listeners=False,
+            **{"product": product, "representation": new_axis}
+        )
+        bpy.data.meshes.remove(mesh)
+
+
+def calculate_quantities(usecase_path, ifc_file, settings):
+    unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+    obj = settings["blender_object"]
+    product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+    parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
+    if not parametric or parametric["Engine"] != "BlenderBIM.DumbWall":
+        return
+    qto = ifcopenshell.api.run(
+        "pset.add_qto", ifc_file, should_run_listeners=False, product=product, name="Qto_WallBaseQuantities"
+    )
+    length = obj.dimensions[0] / unit_scale
+    width = obj.dimensions[1] / unit_scale
+    height = obj.dimensions[2] / unit_scale
+
+    if product.HasOpenings:
+        # TODO: calculate gross / net
+        gross_footprint_area = 0
+        net_footprint_area = 0
+        gross_side_area = 0
+        net_side_area = 0
+        gross_volume = 0
+        net_volume = 0
+    else:
+        bm = bmesh.new()
+        bm.from_mesh(obj.data)
+        bm.faces.ensure_lookup_table()
+        gross_footprint_area = sum([f.calc_area() for f in bm.faces if f.normal.z < -0.9])
+        net_footprint_area = gross_footprint_area
+        gross_side_area = sum([f.calc_area() for f in bm.faces if f.normal.y > 0.9])
+        net_side_area = gross_side_area
+        gross_volume = bm.calc_volume()
+        net_volume = gross_volume
+        bm.free()
+
+    ifcopenshell.api.run(
+        "pset.edit_qto",
+        ifc_file,
+        should_run_listeners=False,
+        qto=qto,
+        properties={
+            "Length": round(length, 2),
+            "Width": round(width, 2),
+            "Height": round(height, 2),
+            "GrossFootprintArea": round(gross_footprint_area, 2),
+            "NetFootprintArea": round(net_footprint_area, 2),
+            "GrossSideArea": round(gross_side_area, 2),
+            "NetSideArea": round(net_side_area, 2),
+            "GrossVolume": round(gross_volume, 2),
+            "NetVolume": round(net_volume, 2),
+        },
+    )
+    PsetData.load(ifc_file, obj.BIMObjectProperties.ifc_definition_id)
+
+
+class DumbWallPlaner:
+    def regenerate_from_layer(self, usecase_path, ifc_file, settings):
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        layer = settings["layer"]
+        thickness = settings["attributes"].get("LayerThickness")
+        if thickness is None:
+            return
+        for layer_set in layer.ToMaterialLayerSet:
+            total_thickness = sum([l.LayerThickness for l in layer_set.MaterialLayers])
+            if not total_thickness:
+                continue
+            for inverse in ifc_file.get_inverse(layer_set):
+                if not inverse.is_a("IfcMaterialLayerSetUsage"):
+                    continue
+                if ifc_file.schema == "IFC2X3":
+                    for rel in ifc_file.get_inverse(inverse):
+                        if not rel.is_a("IfcRelAssociatesMaterial"):
+                            continue
+                        for element in rel.RelatedObjects:
+                            self.change_thickness(element, thickness)
+                else:
+                    for rel in inverse.AssociatedTo:
+                        for element in rel.RelatedObjects:
+                            self.change_thickness(element, thickness)
+
+    def regenerate_from_type(self, usecase_path, ifc_file, settings):
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        if not new_material or not new_material.is_a("IfcMaterialLayerSet"):
+            return
+        new_thickness = sum([l.LayerThickness for l in new_material.MaterialLayers])
+        self.change_thickness(settings["related_object"], new_thickness)
+
+    def change_thickness(self, element, thickness):
+        parametric = ifcopenshell.util.element.get_psets(element).get("EPset_Parametric")
+        if not parametric or parametric["Engine"] != "BlenderBIM.DumbWall":
+            return
+
+        obj = IfcStore.get_element(element.id())
+        if not obj:
+            return
+
+        delta_thickness = (thickness * self.unit_scale) - obj.dimensions.y
+        if round(delta_thickness, 2) == 0:
+            return
+
+        bm = bmesh.new()
+        bm.from_mesh(obj.data)
+        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
+
+        min_face, max_face = self.get_wall_end_faces(obj, bm)
+
+        self.thicken_face(min_face, delta_thickness)
+        self.thicken_face(max_face, delta_thickness)
+
+        bm.to_mesh(obj.data)
+        obj.data.update()
+        bm.free()
+        IfcStore.edited_objs.add(obj)
+
+    def thicken_face(self, face, delta_thickness):
+        slide_magnitude = abs(delta_thickness) / 2
+        for vert in face.verts:
+            slide_vector = None
+            for edge in vert.link_edges:
+                other_vert = edge.verts[1] if edge.verts[0] == vert else edge.verts[0]
+                if delta_thickness > 0:
+                    potential_slide_vector = vert.co - other_vert.co
+                else:
+                    potential_slide_vector = other_vert.co - vert.co
+                if abs(potential_slide_vector.x) > 0.9 or abs(potential_slide_vector.z) > 0.9:
+                    continue
+                slide_vector = potential_slide_vector
+                break
+            if not slide_vector:
+                continue
+            slide_vector *= slide_magnitude / abs(slide_vector.y)
+            vert.co += slide_vector
+
+    # An end face is a quad that is on one end of the wall or the other. It must
+    # have at least one vertex on either extreme X-axis, and a non-insignificant
+    # X component of its face normal
+    def get_wall_end_faces(self, wall, bm):
+        min_face = None
+        max_face = None
+        min_x = min([v[0] for v in wall.bound_box])
+        max_x = max([v[0] for v in wall.bound_box])
+        bm.faces.ensure_lookup_table()
+        for f in bm.faces:
+            for v in f.verts:
+                if v.co.x == min_x and abs(f.normal.x) > 0.1:
+                    min_face = f
+                elif v.co.x == max_x and abs(f.normal.x) > 0.1:
+                    max_face = f
+            if min_face and max_face:
+                break
+        return min_face, max_face

src/blenderbim/blenderbim/bim/module/model/workspace.py

@@ -0,0 +1,59 @@
+import os
+import bpy
+from bpy.types import WorkSpaceTool
+
+
+class BimTool(WorkSpaceTool):
+    bl_space_type = "VIEW_3D"
+    bl_context_mode = "OBJECT"
+
+    bl_idname = "bim.bim_tool"
+    bl_label = "BIM Tool"
+    bl_description = "Gives you BIM authoring related superpowers"
+    bl_icon = os.path.join(os.path.dirname(__file__), "ops.authoring.bim")
+    bl_widget = None
+    # https://docs.blender.org/api/current/bpy.types.KeyMapItems.html
+    bl_keymap = (
+        # ("bim.wall_tool_op", {"type": 'MOUSEMOVE', "value": 'ANY'}, {"properties": []}),
+        # ("mesh.add_wall", {"type": 'LEFTMOUSE', "value": 'PRESS'}, {"properties": []}),
+        ("bim.add_wall", {"type": "A", "value": "PRESS", "shift": True}, {"properties": []}),
+        ("bim.join_wall", {"type": "E", "value": "PRESS", "shift": True}, {"properties": [("join_type", "T")]}),
+        ("bim.join_wall", {"type": "T", "value": "PRESS", "shift": True}, {"properties": [("join_type", "L")]}),
+        ("bim.join_wall", {"type": "Y", "value": "PRESS", "shift": True}, {"properties": [("join_type", "V")]}),
+        ("bim.flip_wall", {"type": "F", "value": "PRESS", "shift": True}, {"properties": []}),
+        ("bim.split_wall", {"type": "S", "value": "PRESS", "shift": True}, {"properties": []}),
+        (
+            "bim.align_wall",
+            {"type": "X", "value": "PRESS", "shift": True},
+            {"properties": [("align_type", "EXTERIOR")]},
+        ),
+        (
+            "bim.align_wall",
+            {"type": "C", "value": "PRESS", "shift": True},
+            {"properties": [("align_type", "CENTERLINE")]},
+        ),
+        (
+            "bim.align_wall",
+            {"type": "V", "value": "PRESS", "shift": True},
+            {"properties": [("align_type", "INTERIOR")]},
+        ),
+    )
+
+    def draw_settings(context, layout, tool):
+        props = context.scene.BIMModelProperties
+        row = layout.row(align=True)
+        row.prop(props, "relating_type", text="")
+
+        row.label(text="", icon="BLANK1")
+
+        row.label(text="", icon="EVENT_SHIFT")
+        row.label(text="Add", icon="EVENT_A")
+        row.label(text="Extend", icon="EVENT_E")
+        row.label(text="Butt", icon="EVENT_T")
+        row.label(text="Mitre", icon="EVENT_Y")
+        row.label(text="Flip", icon="EVENT_F")
+        row.label(text="Split", icon="EVENT_S")
+        row.label(text="", icon="EVENT_X")
+        row.label(text="", icon="EVENT_C")
+        row.label(text="", icon="EVENT_V")
+        row.label(text="Align")

src/blenderbim/blenderbim/bim/module/parametric/__init__.py

@@ -0,0 +1,15 @@
+import bpy
+from . import ui, operator
+
+classes = (
+    operator.ActivateParametricEngine,
+    ui.BIM_PT_parametric,
+)
+
+
+def register():
+    pass
+
+
+def unregister():
+    pass

src/blenderbim/blenderbim/bim/module/parametric/operator.py

@@ -0,0 +1,10 @@
+import bpy
+from blenderbim.bim.ifc import IfcStore
+
+
+class ActivateParametricEngine(bpy.types.Operator):
+    bl_idname = "bim.activate_parametric_engine"
+    bl_label = "Activate Parametric Engine"
+
+    def execute(self, context):
+        return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/parametric/ui.py

@@ -0,0 +1,22 @@
+from bpy.types import Panel
+from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.api.type.data import Data
+
+
+class BIM_PT_parametric(Panel):
+    bl_label = "IFC Parametric Engines"
+    bl_idname = "BIM_PT_parametric"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        #props = context.active_object.BIMTypeProperties
+        row = self.layout.row(align=True)
+        #row.prop(props, "relating_type_class", text="")
+        row.operator("bim.activate_parametric_engine", icon="PLUGIN")

src/blenderbim/blenderbim/bim/module/patch/operator.py

@@ -1,3 +1,4 @@
+import os
 import bpy
 import json
 
@@ -46,7 +47,7 @@ class ExecuteIfcPatch(bpy.types.Operator):
                 "output": context.scene.BIMPatchProperties.ifc_patch_output,
                 "recipe": context.scene.BIMPatchProperties.ifc_patch_recipes,
                 "arguments": json.loads(context.scene.BIMPatchProperties.ifc_patch_args or "[]"),
-                "log": context.scene.BIMProperties.data_dir + "process.log",
+                "log": os.path.join(context.scene.BIMProperties.data_dir, "process.log"),
             }
         )
         return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/project/__init__.py

@@ -4,7 +4,6 @@ from . import ui, prop, operator
 classes = (
     operator.CreateProject,
     operator.CreateProjectLibrary,
-    operator.ValidateIfcFile,
     operator.SelectLibraryFile,
     operator.ChangeLibraryElement,
     operator.RefreshLibrary,
@@ -13,6 +12,9 @@ classes = (
     operator.UnassignLibraryDeclaration,
     operator.SaveLibraryFile,
     operator.AppendLibraryElement,
+    operator.EnableEditingHeader,
+    operator.DisableEditingHeader,
+    operator.EditHeader,
     prop.LibraryElement,
     prop.BIMProjectProperties,
     ui.BIM_PT_project,

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -2,7 +2,9 @@ import bpy
 import logging
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.representation
 import bpy
+import blenderbim.bim.handler
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim import import_ifc
 
@@ -10,8 +12,18 @@ from blenderbim.bim import import_ifc
 class CreateProject(bpy.types.Operator):
     bl_idname = "bim.create_project"
     bl_label = "Create Project"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        IfcStore.begin_transaction(self)
+        IfcStore.add_transaction_operation(self, rollback=self.rollback, commit=lambda data: True)
+        result = self._execute(context)
+        self.transaction_data = {"file": self.file}
+        IfcStore.add_transaction_operation(self, rollback=lambda data: True, commit=self.commit)
+        IfcStore.end_transaction(self)
+        return result
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         if self.file:
             return {"FINISHED"}
@@ -37,10 +49,9 @@ class CreateProject(bpy.types.Operator):
         bpy.ops.bim.add_subcontext(context="Plan")
         bpy.ops.bim.add_subcontext(context="Plan", subcontext="Annotation", target_view="PLAN_VIEW")
 
-        for subcontext in self.file.by_type("IfcGeometricRepresentationSubContext"):
-            if subcontext.ContextIdentifier == "Body":
-                bpy.context.scene.BIMProperties.contexts = str(subcontext.id())
-                break
+        bpy.context.scene.BIMProperties.contexts = str(
+            ifcopenshell.util.representation.get_context(self.file, "Model", "Body", "MODEL_VIEW").id()
+        )
 
         bpy.ops.bim.assign_class(obj=site.name, ifc_class="IfcSite")
         bpy.ops.bim.assign_class(obj=building.name, ifc_class="IfcBuilding")
@@ -48,15 +59,33 @@ class CreateProject(bpy.types.Operator):
         bpy.ops.bim.assign_object(related_object=site.name, relating_object=project.name)
         bpy.ops.bim.assign_object(related_object=building.name, relating_object=site.name)
         bpy.ops.bim.assign_object(related_object=building_storey.name, relating_object=building.name)
-        # Data.load()
+
         return {"FINISHED"}
 
+    def rollback(self, data):
+        IfcStore.file = None
+        blenderbim.bim.handler.purge_module_data()
+
+    def commit(self, data):
+        blenderbim.bim.handler.purge_module_data()
+        IfcStore.file = data["file"]
+
 
 class CreateProjectLibrary(bpy.types.Operator):
     bl_idname = "bim.create_project_library"
     bl_label = "Create Project Library"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        IfcStore.begin_transaction(self)
+        IfcStore.add_transaction_operation(self, rollback=self.rollback, commit=lambda data: True)
+        result = self._execute(context)
+        self.transaction_data = {"file": self.file}
+        IfcStore.add_transaction_operation(self, rollback=lambda data: True, commit=self.commit)
+        IfcStore.end_transaction(self)
+        return result
+
+    def _execute(self, context):
         self.file = IfcStore.get_file()
         if self.file:
             return {"FINISHED"}
@@ -75,27 +104,30 @@ class CreateProjectLibrary(bpy.types.Operator):
         bpy.ops.bim.assign_unit()
         return {"FINISHED"}
 
+    def rollback(self, data):
+        IfcStore.file = None
+        blenderbim.bim.handler.purge_module_data()
 
-class ValidateIfcFile(bpy.types.Operator):
-    bl_idname = "bim.validate_ifc_file"
-    bl_label = "Validate IFC File"
-
-    def execute(self, context):
-        import ifcopenshell.validate
-
-        logger = logging.getLogger("validate")
-        logger.setLevel(logging.DEBUG)
-        ifcopenshell.validate.validate(IfcStore.get_file(), logger)
-        return {"FINISHED"}
+    def commit(self, data):
+        blenderbim.bim.handler.purge_module_data()
+        IfcStore.file = data["file"]
 
 
 class SelectLibraryFile(bpy.types.Operator):
     bl_idname = "bim.select_library_file"
     bl_label = "Select Library File"
+    bl_options = {"REGISTER", "UNDO"}
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
 
     def execute(self, context):
+        old_filepath = IfcStore.library_path
+        result = self._execute(context)
+        self.transaction_data = {"old_filepath": old_filepath, "filepath": self.filepath}
+        IfcStore.add_transaction_operation(self)
+        return result
+
+    def _execute(self, context):
         IfcStore.library_path = self.filepath
         IfcStore.library_file = ifcopenshell.open(self.filepath)
         bpy.ops.bim.refresh_library()
@@ -105,6 +137,18 @@ class SelectLibraryFile(bpy.types.Operator):
         context.window_manager.fileselect_add(self)
         return {"RUNNING_MODAL"}
 
+    def rollback(self, data):
+        if data["old_filepath"]:
+            IfcStore.library_path = data["old_filepath"]
+            IfcStore.library_file = ifcopenshell.open(data["old_filepath"])
+        else:
+            IfcStore.library_path = ""
+            IfcStore.library_file = None
+
+    def commit(self, data):
+        IfcStore.library_path = data["filepath"]
+        IfcStore.library_file = ifcopenshell.open(data["filepath"])
+
 
 class RefreshLibrary(bpy.types.Operator):
     bl_idname = "bim.refresh_library"
@@ -131,6 +175,7 @@ class RefreshLibrary(bpy.types.Operator):
 class ChangeLibraryElement(bpy.types.Operator):
     bl_idname = "bim.change_library_element"
     bl_label = "Change Library Element"
+    bl_options = {"REGISTER", "UNDO"}
     element_name: bpy.props.StringProperty()
 
     def execute(self, context):
@@ -143,7 +188,7 @@ class ChangeLibraryElement(bpy.types.Operator):
         [ifc_classes.add(e.is_a()) for e in elements]
         while len(self.props.library_elements) > 0:
             self.props.library_elements.remove(0)
-        if len(ifc_classes) == 1:
+        if len(ifc_classes) == 1 and list(ifc_classes)[0] == self.element_name:
             for element in elements:
                 new = self.props.library_elements.add()
                 new.name = element.Name or "Unnamed"
@@ -162,6 +207,7 @@ class ChangeLibraryElement(bpy.types.Operator):
 class RewindLibrary(bpy.types.Operator):
     bl_idname = "bim.rewind_library"
     bl_label = "Rewind Library"
+    bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
         self.props = context.scene.BIMProjectProperties
@@ -179,40 +225,70 @@ class RewindLibrary(bpy.types.Operator):
 class AssignLibraryDeclaration(bpy.types.Operator):
     bl_idname = "bim.assign_library_declaration"
     bl_label = "Assign Library Declaration"
+    bl_options = {"REGISTER", "UNDO"}
     definition: bpy.props.IntProperty()
 
     def execute(self, context):
+        IfcStore.library_file.begin_transaction()
+        result = self._execute(context)
+        IfcStore.library_file.end_transaction()
+        IfcStore.add_transaction_operation(self)
+        return result
+
+    def _execute(self, context):
         self.props = context.scene.BIMProjectProperties
+        self.file = IfcStore.library_file
         ifcopenshell.api.run(
             "project.assign_declaration",
-            IfcStore.library_file,
-            definition=IfcStore.library_file.by_id(self.definition),
-            relating_context=IfcStore.library_file.by_type("IfcProjectLibrary")[0],
+            self.file,
+            definition=self.file.by_id(self.definition),
+            relating_context=self.file.by_type("IfcProjectLibrary")[0],
         )
         element_name = self.props.active_library_element
         bpy.ops.bim.rewind_library()
-        bpy.ops.bim.change_library_element(element_name = element_name)
+        bpy.ops.bim.change_library_element(element_name=element_name)
         return {"FINISHED"}
 
+    def rollback(self, data):
+        IfcStore.library_file.undo()
+
+    def commit(self, data):
+        IfcStore.library_file.redo()
+
 
 class UnassignLibraryDeclaration(bpy.types.Operator):
     bl_idname = "bim.unassign_library_declaration"
     bl_label = "Unassign Library Declaration"
+    bl_options = {"REGISTER", "UNDO"}
     definition: bpy.props.IntProperty()
 
     def execute(self, context):
+        IfcStore.library_file.begin_transaction()
+        result = self._execute(context)
+        IfcStore.library_file.end_transaction()
+        IfcStore.add_transaction_operation(self)
+        return result
+
+    def _execute(self, context):
         self.props = context.scene.BIMProjectProperties
+        self.file = IfcStore.library_file
         ifcopenshell.api.run(
             "project.unassign_declaration",
-            IfcStore.library_file,
-            definition=IfcStore.library_file.by_id(self.definition),
-            relating_context=IfcStore.library_file.by_type("IfcProjectLibrary")[0],
+            self.file,
+            definition=self.file.by_id(self.definition),
+            relating_context=self.file.by_type("IfcProjectLibrary")[0],
         )
         element_name = self.props.active_library_element
         bpy.ops.bim.rewind_library()
-        bpy.ops.bim.change_library_element(element_name = element_name)
+        bpy.ops.bim.change_library_element(element_name=element_name)
         return {"FINISHED"}
 
+    def rollback(self, data):
+        IfcStore.library_file.undo()
+
+    def commit(self, data):
+        IfcStore.library_file.redo()
+
 
 class SaveLibraryFile(bpy.types.Operator):
     bl_idname = "bim.save_library_file"
@@ -226,15 +302,22 @@ class SaveLibraryFile(bpy.types.Operator):
 class AppendLibraryElement(bpy.types.Operator):
     bl_idname = "bim.append_library_element"
     bl_label = "Append Library Element"
+    bl_options = {"REGISTER", "UNDO"}
     definition: bpy.props.IntProperty()
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
+        self.file = IfcStore.get_file()
         element = ifcopenshell.api.run(
             "project.append_asset",
-            IfcStore.get_file(),
+            self.file,
+            library=IfcStore.library_file,
             element=IfcStore.library_file.by_id(self.definition),
         )
         self.import_type_from_ifc(element)
+        blenderbim.bim.handler.purge_module_data()
         return {"FINISHED"}
 
     def import_type_from_ifc(self, element):
@@ -255,3 +338,94 @@ class AppendLibraryElement(bpy.types.Operator):
         ifc_importer.type_collection = type_collection
         ifc_importer.create_type_product(element)
         ifc_importer.place_objects_in_spatial_tree()
+
+
+class EnableEditingHeader(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_header"
+    bl_label = "Enable Editing Header"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        props = context.scene.BIMProjectProperties
+        props.is_editing = True
+
+        mvd = "".join(IfcStore.get_file().wrapped_data.header.file_description.description)
+        if "[" in mvd:
+            props.mvd = mvd.split("[")[1][0:-1]
+        else:
+            props.mvd = ""
+
+        author = self.file.wrapped_data.header.file_name.author
+        if author:
+            props.author_name = author[0]
+            if len(author) > 1:
+                props.author_email = author[1]
+
+        organisation = self.file.wrapped_data.header.file_name.organization
+        if organisation:
+            props.organisation_name = organisation[0]
+            if len(organisation) > 1:
+                props.organisation_email = organisation[1]
+
+        props.authorisation = self.file.wrapped_data.header.file_name.authorization
+        return {"FINISHED"}
+
+
+class EditHeader(bpy.types.Operator):
+    bl_idname = "bim.edit_header"
+    bl_label = "Edit Header"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        self.transaction_data = {}
+        self.transaction_data["old"] = self.record_state()
+        result = self._execute(context)
+        self.transaction_data["new"] = self.record_state()
+        IfcStore.add_transaction_operation(self)
+        return result
+
+    def _execute(self, context):
+        self.file = IfcStore.get_file()
+        props = context.scene.BIMProjectProperties
+        props.is_editing = True
+
+        self.file.wrapped_data.header.file_description.description = (f"ViewDefinition[{props.mvd}]",)
+        self.file.wrapped_data.header.file_name.author = (props.author_name, props.author_email)
+        self.file.wrapped_data.header.file_name.organization = (props.organisation_name, props.organisation_email)
+        self.file.wrapped_data.header.file_name.authorization = props.authorisation
+        bpy.ops.bim.disable_editing_header()
+        return {"FINISHED"}
+
+    def record_state(self):
+        self.file = IfcStore.get_file()
+        return {
+            "description": self.file.wrapped_data.header.file_description.description,
+            "author": self.file.wrapped_data.header.file_name.author,
+            "organisation": self.file.wrapped_data.header.file_name.organization,
+            "authorisation": self.file.wrapped_data.header.file_name.authorization,
+        }
+
+    def rollback(self, data):
+        file = IfcStore.get_file()
+        file.wrapped_data.header.file_description.description = data["old"]["description"]
+        file.wrapped_data.header.file_name.author = data["old"]["author"]
+        file.wrapped_data.header.file_name.organization = data["old"]["organisation"]
+        file.wrapped_data.header.file_name.authorization = data["old"]["authorisation"]
+
+    def commit(self, data):
+        file = IfcStore.get_file()
+        file.wrapped_data.header.file_description.description = data["new"]["description"]
+        file.wrapped_data.header.file_name.author = data["new"]["author"]
+        file.wrapped_data.header.file_name.organization = data["new"]["organisation"]
+        file.wrapped_data.header.file_name.authorization = data["new"]["authorisation"]
+
+
+class DisableEditingHeader(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_header"
+    bl_label = "Disable Editing Header"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        context.scene.BIMProjectProperties.is_editing = False
+        return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/project/prop.py

@@ -21,6 +21,13 @@ class LibraryElement(PropertyGroup):
 
 class BIMProjectProperties(PropertyGroup):
     is_authoring: BoolProperty(name="Enable Authoring Mode", default=True)
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    mvd: StringProperty(name="MVD")
+    author_name: StringProperty(name="Author")
+    author_email: StringProperty(name="Author Email")
+    organisation_name: StringProperty(name="Organisation")
+    organisation_email: StringProperty(name="Organisation Email")
+    authorisation: StringProperty(name="Authoriser")
     active_library_element: StringProperty(name="Enable Authoring Mode", default="")
     library_breadcrumb: CollectionProperty(name="Library Breadcrumb", type=StrProperty)
     library_elements: CollectionProperty(name="Library Elements", type=LibraryElement)