material.unassign_material - support batching #4474

material.assign_material - support batching #4474
material.assign_material - update owner history
2026-08-21 04:32:23 +00:00 · 2024-04-12 17:41:37 +05:00 · 2024-04-12 17:41:37 +05:00 · 2024-04-12 17:41:37 +05:00 · 2024-04-12 17:41:36 +05:00 · 2024-04-12 17:41:36 +05:00
573 changed files with 40263 additions and 8827 deletions
@@ -16,7 +16,7 @@ jobs:
    - run: echo ok go

  build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
    needs: activate
    steps:
    - uses: actions/checkout@v2
@@ -80,7 +80,7 @@ jobs:
        path: build/assets/Ifc*

  deliver:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
    needs: build
    name: Docker Build, Tag, Push

@@ -0,0 +1,48 @@
+name: ci-bsdd-pypi
+
+on:
+  schedule:
+    #         ┌───────────── minute (0 - 59)
+    #         │  ┌───────────── hour (0 - 23)
+    #         │  │ ┌───────────── day of the month (1 - 31)
+    #         │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #         │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #         *  * * * *
+    - cron: "0 0 18 * *"
+  workflow_dispatch:
+
+env:
+  major: 0
+  minor: 0
+  name: ifcopenshell
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell'
+    steps:
+    - name: Set env
+      run: echo ok go
+
+  build:
+    needs: activate
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
+        with:
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+      - name: Compile
+        run: |
+          pip install build
+          cd src/bsdd &&
+          make dist
+      - name: Publish a Python distribution to PyPI
+        uses: ortega2247/pypi-upload-action@master
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: src/bsdd/dist
@@ -0,0 +1,48 @@
+name: ci-ifcclash-pypi
+
+on:
+  schedule:
+    #         ┌───────────── minute (0 - 59)
+    #         │  ┌───────────── hour (0 - 23)
+    #         │  │ ┌───────────── day of the month (1 - 31)
+    #         │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #         │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #         *  * * * *
+    - cron: "0 0 18 * *"
+  workflow_dispatch:
+
+env:
+  major: 0
+  minor: 0
+  name: ifcopenshell
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell'
+    steps:
+    - name: Set env
+      run: echo ok go
+
+  build:
+    needs: activate
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
+        with:
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+      - name: Compile
+        run: |
+          pip install build
+          cd src/ifcclash &&
+          make dist
+      - name: Publish a Python distribution to PyPI
+        uses: ortega2247/pypi-upload-action@master
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: src/ifcclash/dist
@@ -0,0 +1,48 @@
+name: ci-ifccsv-pypi
+
+on:
+  schedule:
+    #         ┌───────────── minute (0 - 59)
+    #         │  ┌───────────── hour (0 - 23)
+    #         │  │ ┌───────────── day of the month (1 - 31)
+    #         │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #         │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #         *  * * * *
+    - cron: "0 0 18 * *"
+  workflow_dispatch:
+
+env:
+  major: 0
+  minor: 0
+  name: ifcopenshell
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell'
+    steps:
+    - name: Set env
+      run: echo ok go
+
+  build:
+    needs: activate
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
+        with:
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+      - name: Compile
+        run: |
+          pip install build
+          cd src/ifccsv &&
+          make dist
+      - name: Publish a Python distribution to PyPI
+        uses: ortega2247/pypi-upload-action@master
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: src/ifccsv/dist
@@ -1,6 +1,7 @@
 name: ci-ifcopenshell-pypi

 on:
+  workflow_dispatch:
  schedule:
    #         ┌───────────── minute (0 - 59)
    #         │  ┌───────────── hour (0 - 23)
@@ -35,7 +36,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        pyver: [py36, py37, py38, py39, py310, py311]
+        pyver: [py39, py310, py311, py312]
        config:
          - {
            name: "Windows Build",
@@ -57,7 +58,7 @@ jobs:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
        with:
-          python-version: '3.10' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
          architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
      - run: echo ${{ env.DATE }}
      - name: Get current date
@@ -0,0 +1,48 @@
+name: ci-ifcpatch-pypi
+
+on:
+  schedule:
+    #         ┌───────────── minute (0 - 59)
+    #         │  ┌───────────── hour (0 - 23)
+    #         │  │ ┌───────────── day of the month (1 - 31)
+    #         │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #         │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #         *  * * * *
+    - cron: "0 0 18 * *"
+  workflow_dispatch:
+
+env:
+  major: 0
+  minor: 0
+  name: ifcopenshell
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell'
+    steps:
+    - name: Set env
+      run: echo ok go
+
+  build:
+    needs: activate
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
+        with:
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+      - name: Compile
+        run: |
+          pip install build
+          cd src/ifcpatch &&
+          make dist
+      - name: Publish a Python distribution to PyPI
+        uses: ortega2247/pypi-upload-action@master
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: src/ifcpatch/dist
@@ -9,9 +9,6 @@ on:
    #         │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
    #         *  * * * *
    - cron: "0 0 18 * *"
-  push:
-    paths:
-      - '.github/workflows/ci-ifctester-pypi.yml'
  workflow_dispatch:

 env:
@@ -30,7 +27,6 @@ jobs:

  build:
    needs: activate
-    name: ${{ matrix.config.name }}-${{ matrix.pyver }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
@@ -38,12 +34,7 @@ jobs:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
        with:
-          python-version: '3.10' # Version range or exact version of a Python version to use, using SemVer's version range syntax
-          architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
-      - run: echo ${{ env.DATE }}
-      - name: Get current date
-        id: date
-        run: echo "::set-output name=date::$(date +'%y%m%d')"
+          python-version: '3.11' # Version range or exact version of a Python version to use, using SemVer's version range syntax
      - name: Compile
        run: |
          pip install build
@@ -76,8 +76,14 @@ src/ifcopenshell-python/test/build
 # blenderbim libs
 src/blenderbim/blenderbim/libs

+# blenderbim i18n
+src/blenderbim/blenderbim/translations.py
+
 # blenderbim test temp files
 src/blenderbim/test/files/temp
+src/blenderbim/test/files/basic.ifc.cache.blend
+src/blenderbim/test/files/basic.ifc.cache.sqlite
+
 src/blenderbim/drawings
 src/blenderbim/layouts

@@ -18,14 +18,14 @@ and many other libraries, CLI apps, and more. Support is also provided for auxil
 For more information, see:

 * [IfcOpenShell Website](http://ifcopenshell.org)
-* [IfcOpenShell Documentation](http://blenderbim.org/docs-python)
-  * [IfcOpenShell C++ Installation](https://blenderbim.org/docs-python/ifcopenshell/installation.html)
-  * [IfcOpenShell Python Installation](https://blenderbim.org/docs-python/ifcopenshell-python/installation.html)
-  * [IfcOpenShell Python Hello World Tutorial](https://blenderbim.org/docs-python/ifcopenshell-python/hello_world.html)
+* [IfcOpenShell Documentation](https://docs.ifcopenshell.org)
+  * [IfcOpenShell C++ Installation](https://docs.ifcopenshell.org/ifcopenshell/installation.html)
+  * [IfcOpenShell Python Installation](https://docs.ifcopenshell.org/ifcopenshell-python/installation.html)
+  * [IfcOpenShell Python Hello World Tutorial](https://docs.ifcopenshell.org/ifcopenshell-python/hello_world.html)
 * [BlenderBIM Add-on Website](https://blenderbim.org)
-* [BlenderBIM Add-on Documentation](http://blenderbim.org/docs)
-  * [Add-on Installation](https://blenderbim.org/docs/users/installation.html)
-  * [Exploring an IFC model](https://blenderbim.org/docs/users/exploring_an_ifc_model.html)
+* [BlenderBIM Add-on Documentation](https://docs.blenderbim.org/index.html)
+  * [Add-on Installation](https://docs.blenderbim.org/users/installation.html)
+  * [Exploring an IFC model](https://docs.blenderbim.org/users/exploring_an_ifc_model.html)

 | Service                                         | Status                                                                                                                                       |
 | ----------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
@@ -17,7 +17,7 @@
 #                                                                              #
 ################################################################################

-cmake_minimum_required(VERSION 3.1.3)
+cmake_minimum_required(VERSION 3.5)
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON) # not necessary, but encouraged

@@ -27,6 +27,9 @@ cmake_policy(SET CMP0048 NEW)
 cmake_policy(SET CMP0074 NEW)
 cmake_policy(SET CMP0078 OLD)
 cmake_policy(SET CMP0086 NEW)
+if (POLICY CMP0144)
+cmake_policy(SET CMP0144 NEW) # find_package() uses upper-case <PACKAGENAME>_ROOT variables.
+endif()

 if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release")
@@ -186,7 +189,7 @@ if(GLTF_SUPPORT AND BUILD_CONVERT)
    set(SWIG_DEFINES ${SWIG_DEFINES} -DWITH_GLTF)
 endif()

-# Add USD support to serializers 
+# Add USD support to serializers
 if(USD_SUPPORT)
    UNIFY_ENVVARS_AND_CACHE(USD_INCLUDE_DIR)
    UNIFY_ENVVARS_AND_CACHE(USD_LIBRARY_DIR)
@@ -209,13 +212,13 @@ if(USD_SUPPORT)
    endif()

    set(USD_LIBRARIES
-            usd_usd 
+            usd_usd
            usd_usdGeom
-            usd_usdShade 
-            usd_usdLux 
-            usd_vt 
-            usd_sdf 
-            usd_tf 
+            usd_usdShade
+            usd_usdLux
+            usd_vt
+            usd_sdf
+            usd_tf
            usd_gf
        )

@@ -373,13 +376,34 @@ if(BUILD_IFCGEOM)
        message(STATUS "Looking for Open CASCADE include files in: ${OCC_INCLUDE_DIR}")
    endif()

+    if(OCC_INCLUDE_DIR)
+        file(STRINGS ${OCC_INCLUDE_DIR}/Standard_Version.hxx OCC_MAJOR
+            REGEX "#define OCC_VERSION_MAJOR.*"
+        )
+        string(REGEX MATCH "[0-9]+" OCC_MAJOR ${OCC_MAJOR})
+        file(STRINGS ${OCC_INCLUDE_DIR}/Standard_Version.hxx OCC_MINOR
+          REGEX "#define OCC_VERSION_MINOR.*"
+        )
+        string(REGEX MATCH "[0-9]+" OCC_MINOR ${OCC_MINOR})
+        file(STRINGS ${OCC_INCLUDE_DIR}/Standard_Version.hxx OCC_MAINT
+          REGEX "#define OCC_VERSION_MAINTENANCE.*"
+        )
+        string(REGEX MATCH "[0-9]+" OCC_MAINT ${OCC_MAINT})     
+        set(OCC_VERSION_STRING "${OCC_MAJOR}.${OCC_MINOR}.${OCC_MAINT}")
+    endif(OCC_INCLUDE_DIR)
+
    set(OPENCASCADE_LIBRARY_NAMES
        TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO
-        TKFillet TKSTEP TKSTEPBase TKSTEPAttr TKXSBase TKSTEP209 TKIGES TKOffset TKHLR
+        TKFillet TKXSBase TKOffset TKHLR

        # @todo investigate the exact conditions when this is necessary
        TKBin
    )
+    if(OCC_VERSION_STRING VERSION_LESS 7.8.0)
+        list(APPEND OPENCASCADE_LIBRARY_NAMES  TKIGES TKSTEPBase TKSTEPAttr TKSTEP209 TKSTEP)
+    else(OCC_VERSION_STRING VERSION_LESS 7.8.0)
+        list(APPEND OPENCASCADE_LIBRARY_NAMES TKDESTEP TKDEIGES)
+    endif(OCC_VERSION_STRING VERSION_LESS 7.8.0)

    if("${OCC_LIBRARY_DIR}" STREQUAL "")
        find_library(OCC_LIBRARY TKernel
@@ -435,7 +459,7 @@ if(BUILD_IFCGEOM)

    if(OCCT_STATIC)
        find_package(Threads)
-        
+
        if(WASM_BUILD)
            set(OPENCASCADE_LIBRARIES ${OPENCASCADE_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
        else()
@@ -447,7 +471,7 @@ if(BUILD_IFCGEOM)
                set(OPENCASCADE_LIBRARIES -Wl,--start-group ${OPENCASCADE_LIBRARIES} -Wl,--end-group ${CMAKE_THREAD_LIBS_INIT})
            endif()
        endif()
-        
+
        if (NOT APPLE AND NOT WIN32)
            set(OPENCASCADE_LIBRARIES ${OPENCASCADE_LIBRARIES} "rt")
        endif()
@@ -656,6 +680,10 @@ if(ENABLE_BUILD_OPTIMIZATIONS)
        set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELEASE} -O3")
    endif()
+else()
+    if(MSVC)
+        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Od")
+    endif()
 endif()

 if(MSVC)
@@ -755,6 +783,8 @@ if(NOT SCHEMA_VERSIONS)
    endif()
 endif()

+message(STATUS "IFC SCHEMA_VERSIONS that will be used for the build: ${SCHEMA_VERSIONS}.")
+
 foreach(schema ${SCHEMA_VERSIONS})
    add_definitions(-DHAS_SCHEMA_${schema})
 endforeach()
@@ -837,7 +867,7 @@ if (BUILD_IFCGEOM)
 	if (WASM_BUILD)
 	    set(IFCOPENSHELL_LIBRARIES ${IFCOPENSHELL_LIBRARIES} IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES})
 	else()
-	    set(IFCOPENSHELL_LIBRARIES ${IFCOPENSHELL_LIBRARIES} IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES} IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES})	
+	    set(IFCOPENSHELL_LIBRARIES ${IFCOPENSHELL_LIBRARIES} IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES} IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES})
 	endif()
 endif()

@@ -900,7 +930,7 @@ if(BUILD_IFCGEOM)
        add_library(IfcGeom_ifc${schema} STATIC ${IFCGEOM_FILES})
        set_target_properties(IfcGeom_ifc${schema} PROPERTIES COMPILE_FLAGS "-DIFC_GEOM_EXPORTS -DIfcSchema=Ifc${schema}")
        if (NOT WASM_BUILD)
-            target_link_libraries(IfcGeom_ifc${schema} IfcParse ${OPENCASCADE_LIBRARIES})	    
+            target_link_libraries(IfcGeom_ifc${schema} IfcParse ${OPENCASCADE_LIBRARIES})
        endif()
    endforeach()

@@ -936,7 +966,7 @@ if(BUILD_CONVERT OR BUILD_IFCPYTHON)
    foreach(schema ${SCHEMA_VERSIONS})
        add_library(Serializers_ifc${schema} STATIC ${SERIALIZERS_S_FILES})
        set_target_properties(Serializers_ifc${schema} PROPERTIES COMPILE_FLAGS "-DIFC_GEOM_EXPORTS -DIfcSchema=Ifc${schema}")
-        
+
        if (WASM_BUILD)
            target_link_libraries(Serializers_ifc${schema} ${HDF5_LIBRARIES})
        else()
@@ -1142,7 +1172,7 @@ endforeach(COMPONENT)

 set(CPACK_DEBIAN_PACKAGE_NAME "${PROJECT_NAME}")
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${CPACK_PACKAGE_CONTACT}")
-set(CPACK_DEBIAN_PACKAGE_DEPENDS "python3, libxml2, libocct-foundation-dev, libocct-modeling-algorithms-dev, libocct-modeling-data-dev, libocct-ocaf-dev, libocct-visualization-dev, libocct-data-exchange-dev, libhdf5-serial-dev, libpython3.8, python3-pytest ${BOOST_DEPS}")
+set(CPACK_DEBIAN_PACKAGE_DEPENDS "python3, libxml2, libocct-foundation-dev, libocct-modeling-algorithms-dev, libocct-modeling-data-dev, libocct-ocaf-dev, libocct-visualization-dev, libocct-data-exchange-dev, libhdf5-serial-dev, libpython3-dev, python3-pytest ${BOOST_DEPS}")
 set(CPACK_DEBIAN_PACKAGE_DESCRIPTION_SUMMARY "${CPACK_PACKAGE_DESCRIPTION_SUMMARY}")
 set(CPACK_DEBIAN_PACKAGE_DESCRIPTION "${CPACK_PACKAGE_DESCRIPTION}")
 set(CPACK_DEBIAN_PACKAGE_PRIORITY "optional")
@@ -76,7 +76,7 @@ PROJECT_NAME = "IfcOpenShell"
 USE_CURRENT_PYTHON_VERSION = os.getenv("USE_CURRENT_PYTHON_VERSION")
 ADD_COMMIT_SHA = os.getenv("ADD_COMMIT_SHA")

-PYTHON_VERSIONS = ["3.6.14", "3.7.13", "3.8.13", "3.9.11", "3.10.3", "3.11.7", "3.12.1"]
+PYTHON_VERSIONS = ["3.9.11", "3.10.3", "3.11.8", "3.12.1"]
 JSON_VERSION = "v3.6.1"
 OCE_VERSION = "0.18.3"
 OCCT_VERSION = "7.5.3"
@@ -254,6 +254,11 @@ if not os.path.exists(LOG_FILE):
    open(LOG_FILE, "w").close()
 logger.info(f"using command log file '{LOG_FILE}'")

+# Causing havoc in python 3.11 build
+try:
+    del os.environ['__PYVENV_LAUNCHER__']
+except: pass
+
 def run(cmds, cwd=None, can_fail=False):

    """
@@ -284,8 +289,9 @@ if platform.system() == "Darwin":
        # Apparently not supported
        PYTHON_VERSIONS = [pv for pv in PYTHON_VERSIONS if tuple(map(int, pv.split("."))) >= (3, 7)]
    if run(["sw_vers", "-productVersion"]) < "10.16":
-        # Apparently not supported
-        PYTHON_VERSIONS = [pv for pv in PYTHON_VERSIONS if tuple(map(int, pv.split("."))) < (3, 11)]
+        # This is now solved with the '__PYVENV_LAUNCHER__' hack
+        # PYTHON_VERSIONS = [pv for pv in PYTHON_VERSIONS if tuple(map(int, pv.split("."))) < (3, 11)]
+        pass

 BOOST_VERSION_UNDERSCORE = BOOST_VERSION.replace(".", "_")

@@ -61,26 +61,6 @@ PYPI_PLATFORM:=--platform manylinux_2_17_x86_64
 LXML_ARCH:=manylinux_2_28_x86_64
 SHAPELY_ARCH:=manylinux_2_17_x86_64.manylinux2014_x86_64
 PILLOW_ARCH:=manylinux_2_28_x86_64
-ifeq ($(PYVERSION), py39)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/linux-64/hpp-fcl-2.4.0-py39h359ec1e_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/linux-64/eigenpy-3.2.0-py39hb1babde_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/linux-64/boost-1.78.0-py39h7c9e3ff_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py310)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/linux-64/hpp-fcl-2.4.0-py310hd002f03_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/linux-64/eigenpy-3.2.0-py310hcfe0b05_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/linux-64/boost-1.78.0-py310hc4a4660_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py311)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/linux-64/hpp-fcl-2.4.0-py311h04f086a_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/linux-64/eigenpy-3.2.0-py311h995a085_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/linux-64/boost-1.78.0-py311h59ea3da_3.tar.bz2
-endif
-ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/linux-64/assimp-5.0.1-hedfc422_6.tar.bz2
-QHULL_URL:=https://anaconda.org/conda-forge/qhull/2020.2/download/linux-64/qhull-2020.2-h4bd325d_2.tar.bz2
-OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.8/download/linux-64/octomap-1.9.8-h924138e_0.tar.bz2
-BOOSTCPP_URL:=https://anaconda.org/conda-forge/boost-cpp/1.78.0/download/linux-64/boost-cpp-1.78.0-h6582d0a_3.conda
-ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/linux-64/zlib-1.2.11-h516909a_1010.tar.bz2
 endif

 ifeq ($(PLATFORM), macos)
@@ -89,27 +69,13 @@ SHAPELY_ARCH:=macosx_10_9_x86_64
 PILLOW_ARCH:=macosx_10_10_x86_64
 ifeq ($(PYVERSION), py39)
 LXML_ARCH:=macosx_11_0_x86_64
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-64/hpp-fcl-2.4.0-py39h26350b9_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-64/eigenpy-3.2.0-py39h3323527_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-64/boost-1.78.0-py39h953a6b8_4.tar.bz2
 endif
 ifeq ($(PYVERSION), py310)
 LXML_ARCH:=macosx_11_0_x86_64
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-64/hpp-fcl-2.4.0-py310ha216469_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-64/eigenpy-3.2.0-py310h33a8c9b_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-64/boost-1.78.0-py310h3e792ce_4.tar.bz2
 endif
 ifeq ($(PYVERSION), py311)
 LXML_ARCH:=macosx_11_0_universal2
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-64/hpp-fcl-2.4.0-py311hebdd1a2_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-64/eigenpy-3.2.0-py311h62e90b6_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-64/boost-1.78.0-py311h349b758_4.tar.bz2
 endif
-ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/osx-64/assimp-5.0.1-h1224e73_6.tar.bz2
-QHULL_URL:=https://anaconda.org/conda-forge/qhull/2020.2/download/osx-64/qhull-2020.2-h940c156_2.tar.bz2
-OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.8/download/osx-64/octomap-1.9.8-hb8565cd_0.tar.bz2
-BOOSTCPP_URL:=https://anaconda.org/conda-forge/boost-cpp/1.78.0/download/osx-64/boost-cpp-1.78.0-hf5ba120_3.conda
-ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/osx-64/zlib-1.2.11-h7795811_1010.tar.bz2
 endif

 ifeq ($(PLATFORM), macosm1)
@@ -117,26 +83,6 @@ PYPI_PLATFORM:=--platform macosx_11_0_arm64
 LXML_ARCH:=macosx_11_0_universal2
 SHAPELY_ARCH:=macosx_11_0_arm64
 PILLOW_ARCH:=macosx_11_0_arm64
-ifeq ($(PYVERSION), py39)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-arm64/hpp-fcl-2.4.0-py39h82b2ff2_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-arm64/eigenpy-3.2.0-py39h3a9e884_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-arm64/boost-1.78.0-py39h99de9ae_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py310)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-arm64/hpp-fcl-2.4.0-py310hdb6c3eb_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-arm64/eigenpy-3.2.0-py310h96e9823_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-arm64/boost-1.78.0-py310h629746b_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py311)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/osx-arm64/hpp-fcl-2.4.0-py311hc0c29b9_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/osx-arm64/eigenpy-3.2.0-py311h24fa84d_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/osx-arm64/boost-1.78.0-py311h5c64717_4.tar.bz2
-endif
-ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/osx-arm64/assimp-5.0.1-h0f81e16_7.tar.bz2
-QHULL_URL:=https://anaconda.org/conda-forge/qhull/2020.2/download/osx-arm64/qhull-2020.2-hc021e02_2.tar.bz2
-OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.8/download/osx-arm64/octomap-1.9.8-hffc8910_0.tar.bz2
-BOOSTCPP_URL:=https://anaconda.org/conda-forge/boost-cpp/1.78.0/download/osx-arm64/boost-cpp-1.78.0-h9ed8d21_3.conda
-ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/osx-arm64/zlib-1.2.11-h90dfc92_1014.tar.bz2
 endif

 ifeq ($(PLATFORM), win)
@@ -144,26 +90,6 @@ PYPI_PLATFORM:=--platform win_amd64
 LXML_ARCH:=win_amd64
 SHAPELY_ARCH:=win_amd64
 PILLOW_ARCH:=win_amd64
-ifeq ($(PYVERSION), py39)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/win-64/hpp-fcl-2.4.0-py39hf3ebc58_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/win-64/eigenpy-3.2.0-py39ha1f6a47_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/win-64/boost-1.78.0-py39hea4d8d1_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py310)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/win-64/hpp-fcl-2.4.0-py310h1bf3f0a_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/win-64/eigenpy-3.2.0-py310h7fb871d_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/win-64/boost-1.78.0-py310h220cb41_4.tar.bz2
-endif
-ifeq ($(PYVERSION), py311)
-HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/2.4.0/download/win-64/hpp-fcl-2.4.0-py311hd263b2c_0.conda
-EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/3.2.0/download/win-64/eigenpy-3.2.0-py311hd354db1_0.conda
-BOOST_URL:=https://anaconda.org/conda-forge/boost/1.78.0/download/win-64/boost-1.78.0-py311h12feb9d_3.tar.bz2
-endif
-ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.2.5/download/win-64/assimp-5.2.5-h4dcb625_0.tar.bz2
-QHULL_URL:=https://anaconda.org/conda-forge/qhull/2020.2/download/win-64/qhull-2020.2-h70d2c02_2.tar.bz2
-OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.8/download/win-64/octomap-1.9.8-h91493d7_0.tar.bz2
-BOOSTCPP_URL:=https://anaconda.org/conda-forge/boost-cpp/1.78.0/download/win-64/boost-cpp-1.78.0-h9f4b32c_3.conda
-ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/win-64/zlib-1.2.11-h62dcd97_1010.tar.bz2
 endif

 LXML_NAME:=lxml
@@ -211,7 +137,7 @@ endif
 	cp -r blenderbim/* dist/blenderbim/

 	# Provides IfcOpenShell Python functionality
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v0.7.0-6c9e130-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v0.7.0-f7c03db-$(PLATFORM)64.zip
 	cd dist/working && unzip ifcopenshell-python*
 	cp -r dist/working/ifcopenshell dist/blenderbim/libs/site/packages/

@@ -427,6 +353,8 @@ endif
 	cd dist/working && mkdir site-packages
 	# Required by IfcCSV
 	cd dist/working && . env/bin/activate && $(PIP) install pandas $(PYPI_PLATFORM) --python-version $(PYPI_VERSION) --implementation $(PYPI_IMP) --only-binary=:all: --target=./site-packages
+	# Pandas ships with very heavy tests
+	cd dist/working/site-packages/pandas && rm -rf tests
 	cd dist/working && . env/bin/activate && $(PIP) install openpyxl --target=./site-packages
 	cd dist/working && . env/bin/activate && $(PIP) install odfpy --target=./site-packages
 	# Required by IFCCityJSON
@@ -434,161 +362,12 @@ endif
 	# Provides express rule validation for ifcopenshell.validate
 	cd dist/working && . env/bin/activate && $(PIP) install pytest --target=./site-packages
 	# Provides Brickschema functionality
-	cd dist/working && . env/bin/activate && $(PIP) install brickschema[persistence] --target=./site-packages
+	cd dist/working && . env/bin/activate && $(PIP) install "brickschema[persistence]==0.7.6a2" --target=./site-packages
+	# Required for SVG to DXF conversion
+	cd dist/working && . env/bin/activate && $(PIP) install "ezdxf" --target=./site-packages
 	cp -r dist/working/site-packages/* dist/blenderbim/libs/site/packages/
 	rm -rf dist/working

-	# Required by IFCClash
-	mkdir dist/working
-	cd dist/working && wget $(HPPFCL_URL)
-	cd dist/working && unzip hpp-fcl*
-	cd dist/working && tar -I zstd -xvf pkg*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/$(PYLIBDIR)/site-packages/hppfcl dist/blenderbim/libs/site/packages/
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/$(PYLIBDIR)/site-packages/hppfcl dist/blenderbim/libs/site/packages/
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/$(PYLIBDIR)/site-packages/hppfcl dist/blenderbim/libs/site/packages/
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Lib/site-packages/hppfcl dist/blenderbim/libs/site/packages/
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(ASSIMP_URL)
-	cd dist/working && tar -xf assimp*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(QHULL_URL)
-	cd dist/working && tar -xf qhull*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(EIGENPY_URL)
-	cd dist/working && unzip eigenpy*
-	cd dist/working && tar -I zstd -xvf pkg*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(OCTOMAP_URL)
-	cd dist/working && tar -xf octomap*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(BOOST_URL)
-	cd dist/working && tar -xf boost*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(BOOSTCPP_URL)
-	cd dist/working && unzip boost-cpp*
-	cd dist/working && tar -I zstd -xvf pkg*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/libboost_serialization.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/libboost_serialization.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/libboost_serialization.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/boost_serialization.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
-	# Required by hpp-fcl
-	mkdir dist/working
-	cd dist/working && wget $(ZLIB_URL)
-	cd dist/working && tar -xf zlib*
-ifeq ($(PLATFORM), linux)
-	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macos)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), macosm1)
-	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
-endif
-ifeq ($(PLATFORM), win)
-	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
-endif
-	rm -rf dist/working
-
 	# Required by BIMTester
 	mkdir dist/working
 	cd dist/working && wget https://files.pythonhosted.org/packages/c8/4b/d0a8c23b6c8985e5544ea96d27105a273ea22051317f850c2cdbf2029fe4/behave-1.2.6.tar.gz
@@ -636,34 +415,6 @@ endif
 	cd dist/working/parse_type-0.5.2/ && cp -r parse_type ../../blenderbim/libs/site/packages/
 	rm -rf dist/working

-	# Required by augin
-	mkdir dist/working
-	cd dist/working && wget https://files.pythonhosted.org/packages/76/b4/b7baffbda025efd5dc8fcd8d2e953e3aa939c236a484084fa8f4c3588ee9/boto3-1.17.17.tar.gz
-	cd dist/working && tar -xzvf boto3*
-	cd dist/working/boto3-1.17.17/ && cp -r boto3 ../../blenderbim/libs/site/packages/
-	rm -rf dist/working
-
-	# Required by boto3
-	mkdir dist/working
-	cd dist/working && wget https://files.pythonhosted.org/packages/7f/2e/e02fdfd0f0377c4e44e61de27b05d5cfe93575770661ef9ded80ed90fa88/botocore-1.20.17.tar.gz
-	cd dist/working && tar -xzvf botocore*
-	cd dist/working/botocore-1.20.17/ && cp -r botocore ../../blenderbim/libs/site/packages/
-	rm -rf dist/working
-
-	# Required by boto3
-	mkdir dist/working
-	cd dist/working && wget https://files.pythonhosted.org/packages/3c/56/3f325b1eef9791759784aa5046a8f6a1aff8f7c898a2e34506771d3b99d8/jmespath-0.10.0.tar.gz
-	cd dist/working && tar -xzvf jmespath*
-	cd dist/working/jmespath-0.10.0/ && cp -r jmespath ../../blenderbim/libs/site/packages/
-	rm -rf dist/working
-
-	# Required by boto3
-	mkdir dist/working
-	cd dist/working && wget https://files.pythonhosted.org/packages/08/e1/3ee2096ebaeeb8c186d20ed16c8faf4a503913e5c9a0e14cd6b8ffc405a3/s3transfer-0.3.4.tar.gz
-	cd dist/working && tar -xzvf s3transfer*
-	cd dist/working/s3transfer-0.3.4/ && cp -r s3transfer ../../blenderbim/libs/site/packages/
-	rm -rf dist/working
-
 	# Provides IFCJSON functionality
 	mkdir dist/working
 	cd dist/working && wget https://github.com/IFCJSON-Team/IFC2JSON_python/archive/master.zip
@@ -681,7 +432,7 @@ endif
 	# Required by brickschema
 	# This is a bit of a dodgy one, it should be provided by setuptools which Blender doesn't ship.
 	mkdir dist/working
-	cd dist/working && wget https://blenderbim.org/builds/pkg_resources.tar.gz
+	cd dist/working && wget https://github.com/IfcOpenShell/IfcOpenShell/raw/v0.7.0/src/blenderbim/scripts/pkg_resources.tar.gz
 	cd dist/working && tar -xzvf pkg_resources*
 	cd dist/working/ && cp -r pkg_resources ../blenderbim/libs/site/packages/
 	rm -rf dist/working
@@ -696,9 +447,9 @@ endif
 	# Required for Desktop icon and file association
 	cp -r blenderbim/libs/desktop dist/blenderbim/libs/

-	# generate translations module for BBIM build
+	# Generate translations module for BBIM build
 	git clone https://github.com/IfcOpenShell/blenderbim-translations.git dist/working
-	python scripts/bbim_translations.py -i "dist/working" -o "dist/blenderbim"
+	$(PYTHON) scripts/bbim_translations.py -i "dist/working" -o "dist/blenderbim"
 	rm -rf dist/working

 	# Remove dependencies also bundled with Blender
@@ -706,6 +457,7 @@ endif
 	rm -rf dist/blenderbim/libs/site/packages/numpy.libs

 	cd dist/blenderbim && $(SED) "s/999999/$(VERSION)/" __init__.py
+	cd dist/blenderbim && $(SED) "s/999999/$(VERSION)/" blender_manifest.toml
 	cd dist/blenderbim/bim && $(SED) "s/8888888/$(LAST_COMMIT_HASH)/" __init__.py
 	cd dist && zip -r blenderbim-$(VERSION)-$(PYVERSION)-$(PLATFORM).zip ./*
 	rm -rf dist/blenderbim
@@ -23,6 +23,7 @@ import bpy.utils.previews
 import blenderbim
 import importlib
 from . import handler, ui, prop, operator, helper
+from typing import Callable, Union

 try:
    from blenderbim.translations import translations_dict
@@ -96,9 +97,12 @@ for name in modules.keys():
 classes = [
    operator.AddIfcFile,
    operator.BIM_OT_add_section_plane,
+    operator.BIM_OT_delete_object,
    operator.BIM_OT_open_webbrowser,
    operator.BIM_OT_remove_section_plane,
+    operator.BIM_OT_select_object,
    operator.BIM_OT_show_description,
+    operator.ClippingPlaneCutWithCappings,
    operator.EditBlenderCollection,
    operator.FileAssociate,
    operator.FileUnassociate,
@@ -106,6 +110,7 @@ classes = [
    operator.OpenUri,
    operator.ReloadIfcFile,
    operator.RemoveIfcFile,
+    operator.RevertClippingPlaneCut,
    operator.SelectDataDir,
    operator.SelectIfcFile,
    operator.SelectSchemaDir,
@@ -128,6 +133,7 @@ classes = [
    prop.BIMMeshProperties,
    prop.BIMFacet,
    prop.BIMFilterGroup,
+    ui.BIM_UL_clipping_plane,
    ui.BIM_UL_generic,
    ui.BIM_UL_topics,
    ui.BIM_ADDON_preferences,
@@ -175,6 +181,7 @@ classes = [
    ui.BIM_PT_tab_sandbox,
    # TODO: move this somewhere else and clean it up
    ui.BIM_PT_section_plane,
+    ui.BIM_PT_section_with_cappings,
 ]

 for mod in modules.values():
@@ -184,7 +191,7 @@ addon_keymaps = []
 icons = None
 is_registering = False
 last_commit_hash = "8888888"
-overridden_scene_panels = dict()
+original_scene_panels_polls: dict[bpy.types.Panel, Union[Callable, None]] = dict()


 def on_register(scene):
@@ -292,10 +299,10 @@ def unregister():
            km.keymap_items.remove(kmi)
    addon_keymaps.clear()

-    for panel in tuple(overridden_scene_panels.keys()):
-        original_panel, override_panel = overridden_scene_panels[panel]
-        bpy.utils.unregister_class(override_panel)
-        bpy.utils.register_class(original_panel)
-        del overridden_scene_panels[panel]
+    import blenderbim.tool as tool
+
+    # use tuple() as method will be removing keys from dict
+    for panel in tuple(original_scene_panels_polls.keys()):
+        tool.Blender.remove_scene_panel_override(panel)

    bpy.app.translations.unregister("blenderbim")
@@ -10,7 +10,7 @@
 * (at your option) any later version.
 *
 * BlenderBIM Add-on is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
@@ -10,7 +10,7 @@
 * (at your option) any later version.
 *
 * BlenderBIM Add-on is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
@@ -1,17 +1,17 @@
 ISO-10303-21;
 HEADER;
 FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
-FILE_NAME('/dev/null','2023-09-07T13:40:06+10:00',(),(),'IfcOpenShell v0.7.0-fbd8ea1ed','IfcOpenShell v0.7.0-fbd8ea1ed','Nobody');
+FILE_NAME('/dev/null','2024-03-03T16:03:58+11:00',(),(),'IfcOpenShell v0.7.0-eaa2aa05a','IfcOpenShell v0.7.0-eaa2aa05a','Nobody');
 FILE_SCHEMA(('IFC4'));
 ENDSEC;
 DATA;
-#1=IFCPROJECT('1arVsMni92iPUaaryGTUz2',$,'BlenderBIM Demo',$,$,$,$,(#12,#16),#7);
-#2=IFCPROJECTLIBRARY('1FfDG5b21DuBDOO4eUE9rF',$,'BlenderBIM Demo Library',$,$,$,$,$,$);
-#3=IFCRELDECLARES('3tfDIC3Tf9wP8EUOoFeycK',$,$,$,#1,(#2));
+#1=IFCPROJECT('3NJUxHyTzEv96oezyDYEqf',$,'BlenderBIM Demo',$,$,$,$,(#12,#16),#7);
+#2=IFCPROJECTLIBRARY('0D39k7hbT5ce$jWaCd2niG',$,'BlenderBIM Demo Library',$,$,$,$,$,$);
+#3=IFCRELDECLARES('2RWVohyP57PBHT9zCs4H2O',$,$,$,#1,(#2));
 #4=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);
 #5=IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.);
 #6=IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.);
-#7=IFCUNITASSIGNMENT((#5,#6,#4));
+#7=IFCUNITASSIGNMENT((#6,#4,#5));
 #8=IFCCARTESIANPOINT((0.,0.,0.));
 #9=IFCDIRECTION((0.,0.,1.));
 #10=IFCDIRECTION((1.,0.,0.));
@@ -23,84 +23,84 @@ DATA;
 #16=IFCGEOMETRICREPRESENTATIONCONTEXT($,'Plan',2,1.E-05,#15,$);
 #17=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Body','Model',*,*,*,*,#12,$,.MODEL_VIEW.,$);
 #18=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Body','Plan',*,*,*,*,#16,$,.PLAN_VIEW.,$);
-#19=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Annotation','Plan',*,*,*,*,#16,$,.PLAN_VIEW.,$);
+#19=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Annotation','Model',*,*,*,*,#16,$,.MODEL_VIEW.,$);
 #20=IFCMATERIAL('Unknown',$,$);
-#21=IFCWALLTYPE('2o8NqQQbHA5BeErrgwfr7d',$,'WAL50',$,$,$,$,$,$,.NOTDEFINED.);
+#21=IFCWALLTYPE('2F1k78lI53fwS0rg3rqrRb',$,'WAL50',$,$,$,$,$,$,.NOTDEFINED.);
 #22=IFCMATERIALLAYERSET((#24),$,$);
-#23=IFCRELASSOCIATESMATERIAL('1Q$5DZKr98n82Eitz2dWey',$,$,$,(#21),#22);
+#23=IFCRELASSOCIATESMATERIAL('0khP_Smdj12f2JrOTRbRKj',$,$,$,(#21),#22);
 #24=IFCMATERIALLAYER(#20,0.05,$,$,$,$,$);
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-#26=IFCWALLTYPE('3KlIOv_P9A79tkt8D_jq_m',$,'WAL100',$,$,$,$,$,$,.NOTDEFINED.);
+#25=IFCRELDECLARES('31JriXdev6BP2sC9lcxdC1',$,$,$,#2,(#26,#48,#72,#59,#92,#30,#96,#63,#21,#54,#87,#210,#153,#34,#67,#38,#82,#77,#42));
+#26=IFCWALLTYPE('3R5onkTtX1IxdCMPoThRaw',$,'WAL100',$,$,$,$,$,$,.NOTDEFINED.);
 #27=IFCMATERIALLAYERSET((#29),$,$);
-#28=IFCRELASSOCIATESMATERIAL('32B9Wx8Z1FxhIN7m77MiHG',$,$,$,(#26),#27);
+#28=IFCRELASSOCIATESMATERIAL('0$mXRPCT16nP6Q70XFNvZv',$,$,$,(#26),#27);
 #29=IFCMATERIALLAYER(#20,0.1,$,$,$,$,$);
-#30=IFCWALLTYPE('2DqrSeel1AGw6h3b$ujafZ',$,'WAL200',$,$,$,$,$,$,.NOTDEFINED.);
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 #31=IFCMATERIALLAYERSET((#33),$,$);
-#32=IFCRELASSOCIATESMATERIAL('2FeYUpt3D4tAvwgGmwXWZn',$,$,$,(#30),#31);
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 #33=IFCMATERIALLAYER(#20,0.2,$,$,$,$,$);
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 #35=IFCMATERIALLAYERSET((#37),$,$);
-#36=IFCRELASSOCIATESMATERIAL('2bFeM6xevAwucuwMlauX77',$,$,$,(#34),#35);
+#36=IFCRELASSOCIATESMATERIAL('2FYhYrvmv4SBoZHVWDTTte',$,$,$,(#34),#35);
 #37=IFCMATERIALLAYER(#20,0.3,$,$,$,$,$);
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 #39=IFCMATERIALLAYERSET((#41),$,$);
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+#40=IFCRELASSOCIATESMATERIAL('0yvFX0zgb9uvJ3ARnf4mfe',$,$,$,(#38),#39);
 #41=IFCMATERIALLAYER(#20,0.01,$,$,$,$,$);
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 #43=IFCMATERIALLAYERSET((#45),$,$);
-#44=IFCRELASSOCIATESMATERIAL('36rl5NddT1ux6ejkQAkT2z',$,$,$,(#42),#43);
+#44=IFCRELASSOCIATESMATERIAL('1iAOG6NK9FBxitFtzN9qP5',$,$,$,(#42),#43);
 #45=IFCMATERIALLAYER(#20,0.02,$,$,$,$,$);
-#46=IFCPROPERTYSET('2VZJ9xfdn1NeOY6uEmnnYW',$,'EPset_Parametric',$,(#47));
+#46=IFCPROPERTYSET('18ICCZ0fjDG9UXMyzrsFBA',$,'EPset_Parametric',$,(#47));
 #47=IFCPROPERTYSINGLEVALUE('LayerSetDirection',$,IFCLABEL('AXIS2'),$);
-#48=IFCCOVERINGTYPE('1uU6rxt95AC91lZ0jTRG6G',$,'COV30',$,$,(#52),$,$,$,.NOTDEFINED.);
+#48=IFCCOVERINGTYPE('0gEOtYULD0F9KD9zPoA6cJ',$,'COV30',$,$,(#52),$,$,$,.NOTDEFINED.);
 #49=IFCMATERIALLAYERSET((#51),$,$);
-#50=IFCRELASSOCIATESMATERIAL('2lFv4xQYr5bwtiSsMTVCgz',$,$,$,(#48),#49);
+#50=IFCRELASSOCIATESMATERIAL('0xd6dsjf13JA98q9fnAMpQ',$,$,$,(#48),#49);
 #51=IFCMATERIALLAYER(#20,0.03,$,$,$,$,$);
-#52=IFCPROPERTYSET('0HnrRhcd16Yfbgtci4sqCG',$,'EPset_Parametric',$,(#53));
+#52=IFCPROPERTYSET('3qCbs1tuDCvuOXam5RrA$a',$,'EPset_Parametric',$,(#53));
 #53=IFCPROPERTYSINGLEVALUE('LayerSetDirection',$,IFCLABEL('AXIS3'),$);
-#54=IFCRAMPTYPE('3nonXCVn58jhVV08N8c97B',$,'RAM200',$,$,$,$,$,$,.NOTDEFINED.);
+#54=IFCRAMPTYPE('2yW1ePlyb8cOR6HdEntpRh',$,'RAM200',$,$,$,$,$,$,.NOTDEFINED.);
 #55=IFCMATERIALLAYERSET((#57),$,$);
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 #57=IFCMATERIALLAYER(#20,0.2,$,$,$,$,$);
 #58=IFCCIRCLEPROFILEDEF(.AREA.,$,$,0.3);
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+#59=IFCPILETYPE('25MTkMtaH5QeCf$gFbvSSw',$,'P1',$,$,$,$,$,$,.NOTDEFINED.);
 #60=IFCMATERIALPROFILESET($,$,(#62),$);
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+#61=IFCRELASSOCIATESMATERIAL('09FXUZCnrFEffxBrtg16gx',$,$,$,(#59),#60);
 #62=IFCMATERIALPROFILE($,$,#20,#58,$,$);
-#63=IFCSLABTYPE('2janmz3nH4P9IHaOVvGY_B',$,'FLR150',$,$,$,$,$,$,.NOTDEFINED.);
+#63=IFCSLABTYPE('1Akbal7tP5DAPW0ti$Qp30',$,'FLR150',$,$,$,$,$,$,.NOTDEFINED.);
 #64=IFCMATERIALLAYERSET((#66),$,$);
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+#65=IFCRELASSOCIATESMATERIAL('0jzkXlkBL4HhmQ_FTWW6Cj',$,$,$,(#63),#64);
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+#67=IFCSLABTYPE('0$gpYNi3T08BrxaR67CxgI',$,'FLR250',$,$,$,$,$,$,.NOTDEFINED.);
 #68=IFCMATERIALLAYERSET((#70),$,$);
-#69=IFCRELASSOCIATESMATERIAL('1BeBXPqen9TQEE42SxzhjF',$,$,$,(#67),#68);
+#69=IFCRELASSOCIATESMATERIAL('3a6kjEM29DleYTlSkA8_DK',$,$,$,(#67),#68);
 #70=IFCMATERIALLAYER(#20,0.3,$,$,$,$,$);
 #71=IFCRECTANGLEPROFILEDEF(.AREA.,'500x600',$,0.5,0.6);
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+#72=IFCCOLUMNTYPE('278sjptdDDzgOZseERj390',$,'C1',$,$,$,$,$,$,.NOTDEFINED.);
 #73=IFCMATERIALPROFILESET($,$,(#75),$);
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+#74=IFCRELASSOCIATESMATERIAL('1ppYXw39v6kBwi3rrIm4ZE',$,$,$,(#72),#73);
 #75=IFCMATERIALPROFILE($,$,#20,#71,$,$);
 #76=IFCCIRCLEHOLLOWPROFILEDEF(.AREA.,'500.0x5.0 CHS',$,0.25,0.005);
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+#77=IFCCOLUMNTYPE('3aSZOvGmr7jggSNwsq5PJE',$,'C2',$,$,$,$,$,$,.NOTDEFINED.);
 #78=IFCMATERIALPROFILESET($,$,(#80),$);
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 #80=IFCMATERIALPROFILE($,$,#20,#76,$,$);
 #81=IFCRECTANGLEHOLLOWPROFILEDEF(.AREA.,'150x75x2.0 RHS',$,0.075,0.15,0.002,0.005,0.005);
-#82=IFCCOLUMNTYPE('21YcNdKNj2$95U55yNx1Nw',$,'C3',$,$,$,$,$,$,.NOTDEFINED.);
+#82=IFCCOLUMNTYPE('28iv3Kru12yQ7R7RRwNjvD',$,'C3',$,$,$,$,$,$,.NOTDEFINED.);
 #83=IFCMATERIALPROFILESET($,$,(#85),$);
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+#84=IFCRELASSOCIATESMATERIAL('2M_oL$n3j6rBRnOW5RSk87',$,$,$,(#82),#83);
 #85=IFCMATERIALPROFILE($,$,#20,#81,$,$);
 #86=IFCISHAPEPROFILEDEF(.AREA.,'DEMO-I',$,0.1,0.2,0.005,0.01,0.005,$,$);
-#87=IFCBEAMTYPE('2CsGpD$6nDCxWv9jXTtvq9',$,'B1',$,$,$,$,$,$,.NOTDEFINED.);
+#87=IFCBEAMTYPE('2E$V5l4b54dxuToJ1A6IHp',$,'B1',$,$,$,$,$,$,.NOTDEFINED.);
 #88=IFCMATERIALPROFILESET($,$,(#90),$);
-#89=IFCRELASSOCIATESMATERIAL('2LJExc74j9rgBSBx51HDPK',$,$,$,(#87),#88);
+#89=IFCRELASSOCIATESMATERIAL('3PUNnY7cj8LhyXbHKVqZnf',$,$,$,(#87),#88);
 #90=IFCMATERIALPROFILE($,$,#20,#86,$,$);
 #91=IFCCSHAPEPROFILEDEF(.AREA.,'DEMO-C',$,0.2,0.1,0.0015,0.03,0.005);
-#92=IFCBEAMTYPE('32pHN2b0P0awGw$U8PpneO',$,'B2',$,$,$,$,$,$,.NOTDEFINED.);
+#92=IFCBEAMTYPE('3qutoZTvP0lvLWNXyjPhPm',$,'B2',$,$,$,$,$,$,.NOTDEFINED.);
 #93=IFCMATERIALPROFILESET($,$,(#95),$);
-#94=IFCRELASSOCIATESMATERIAL('2wg8R1Drb2xhQ2Y_pRSh3c',$,$,$,(#92),#93);
+#94=IFCRELASSOCIATESMATERIAL('3dGyQf42H2ahch2bSYPPHP',$,$,$,(#92),#93);
 #95=IFCMATERIALPROFILE($,$,#20,#91,$,$);
-#96=IFCWINDOWTYPE('1Gg9HfZEr69u8SdWfDs2J3',$,'WT01',$,$,$,(#135,#152),$,$,.NOTDEFINED.,.NOTDEFINED.,$,$);
+#96=IFCWINDOWTYPE('0bK3c4PWL3eOMNwkPN$rlg',$,'WT01',$,$,$,(#135,#152),$,$,.NOTDEFINED.,.NOTDEFINED.,$,$);
 #97=IFCINDEXEDPOLYGONALFACE((13,17,18,14));
 #98=IFCINDEXEDPOLYGONALFACE((5,6,3,4));
 #99=IFCINDEXEDPOLYGONALFACE((7,8,2,1));
@@ -157,7 +157,7 @@ DATA;
 #150=IFCDIRECTION((0.,0.,1.));
 #151=IFCAXIS2PLACEMENT3D(#148,#150,#149);
 #152=IFCREPRESENTATIONMAP(#151,#147);
-#153=IFCDOORTYPE('0NBUmPKyT9WecsIeYJrEqg',$,'DT01',$,$,$,(#196,#209),$,$,.NOTDEFINED.,.NOTDEFINED.,$,$);
+#153=IFCDOORTYPE('2j0vIBgkH0ERnBCP0cpcCz',$,'DT01',$,$,$,(#196,#209),$,$,.NOTDEFINED.,.NOTDEFINED.,$,$);
 #154=IFCINDEXEDPOLYGONALFACE((17,16,15,14));
 #155=IFCINDEXEDPOLYGONALFACE((2,3,29,28));
 #156=IFCINDEXEDPOLYGONALFACE((27,28,29,30,32,31));
@@ -214,7 +214,7 @@ DATA;
 #207=IFCDIRECTION((0.,0.,1.));
 #208=IFCAXIS2PLACEMENT3D(#205,#207,#206);
 #209=IFCREPRESENTATIONMAP(#208,#204);
-#210=IFCFURNITURETYPE('3Kyc6IyarAUw3_8fkNtXIg',$,'BUN01',$,$,$,(#931,#952),$,$,.NOTDEFINED.,.NOTDEFINED.);
+#210=IFCFURNITURETYPE('02XxQ_3oT0SPrmFPATrt7o',$,'BUN01',$,$,$,(#931,#952),$,$,.NOTDEFINED.,.NOTDEFINED.);
 #211=IFCINDEXEDPOLYGONALFACE((187,278,44));
 #212=IFCINDEXEDPOLYGONALFACE((21,52,60));
 #213=IFCINDEXEDPOLYGONALFACE((91,100,31));
@@ -957,35 +957,35 @@ DATA;
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-#954=IFCPROPERTYSET('2dQzX_K4r1Xet6dz9zBlgs',$,'EPset_Annotation',$,(#955));
+#953=IFCTYPEPRODUCT('0UrP0fLdD5OwzwD41aRKao',$,'SETOUT-POINT',$,'IfcAnnotation/SYMBOL',(#954),$,$);
+#954=IFCPROPERTYSET('27lmSbeAXC08EWkEq8XdUG',$,'EPset_Annotation',$,(#955));
 #955=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('setout-point'),$);
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-#957=IFCPROPERTYSET('3APQOw$FP1ivxp08UxHsl6',$,'EPset_Annotation',$,(#958));
+#956=IFCTYPEPRODUCT('3IQrQOSFP0WfkuLk0ak7_0',$,'CONTROL-POINT',$,'IfcAnnotation/SYMBOL',(#957),$,$);
+#957=IFCPROPERTYSET('23aN9DsdjFcfWq8KGSIVoN',$,'EPset_Annotation',$,(#958));
 #958=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('control-point'),$);
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-#960=IFCPROPERTYSET('0cTSYXMc9B$PTXVDrhBYYW',$,'EPset_Annotation',$,(#961));
+#959=IFCTYPEPRODUCT('3wvbaiaIz8agQgDRzt01vz',$,'TRAVERSE-POINT',$,'IfcAnnotation/SYMBOL',(#960),$,$);
+#960=IFCPROPERTYSET('1j7aFM1Rb9BRuKgUEn1U10',$,'EPset_Annotation',$,(#961));
 #961=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('traverse-point'),$);
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 #964=IFCPROPERTYSINGLEVALUE('Classes',$,IFCLABEL('dashed'),$);
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 #970=IFCPROPERTYSINGLEVALUE('Classes',$,IFCLABEL('thin'),$);
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 #973=IFCPROPERTYSINGLEVALUE('Classes',$,IFCLABEL('medium'),$);
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+#975=IFCPROPERTYSET('2XQxgO16v9vxjvuIJpaPpG',$,'EPset_Annotation',$,(#976));
 #976=IFCPROPERTYSINGLEVALUE('Classes',$,IFCLABEL('thick'),$);
-#977=IFCTYPEPRODUCT('1T5C$$ONTBB8A9a7vv0Gn6',$,'STRONG',$,'IfcAnnotation/LINEWORK',(#978),$,$);
-#978=IFCPROPERTYSET('1gRomAS1L2WguA51ZI0E40',$,'EPset_Annotation',$,(#979));
+#977=IFCTYPEPRODUCT('3G2s7ZLzfDJh5J$2iIzHw9',$,'STRONG',$,'IfcAnnotation/LINEWORK',(#978),$,$);
+#978=IFCPROPERTYSET('0TcB8Gal96vebTrLWa5CEw',$,'EPset_Annotation',$,(#979));
 #979=IFCPROPERTYSINGLEVALUE('Classes',$,IFCLABEL('strong'),$);
-#980=IFCTYPEPRODUCT('2LmKYrAEr2K8EwJyCAsyc4',$,'SETOUT-TAG',$,'IfcAnnotation/TEXT',(#981),(#1000),$);
-#981=IFCPROPERTYSET('0nF9du8qDAF9aldqjCUsbX',$,'EPset_Annotation',$,(#982));
+#980=IFCTYPEPRODUCT('3pq2B$0k52ZOv2bFuRYkxO',$,'SETOUT-TAG',$,'IfcAnnotation/TEXT',(#981),(#1000),$);
+#981=IFCPROPERTYSET('39$oNFI052cBhtpZCVVLfj',$,'EPset_Annotation',$,(#982));
 #982=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('setout-tag'),$);
 #983=IFCCARTESIANPOINT((0.,0.,0.));
 #984=IFCDIRECTION((0.,0.,1.));
@@ -1005,8 +1005,8 @@ DATA;
 #998=IFCDIRECTION((0.,0.,1.));
 #999=IFCAXIS2PLACEMENT3D(#996,#998,#997);
 #1000=IFCREPRESENTATIONMAP(#999,#995);
-#1001=IFCTYPEPRODUCT('1cdhVmqEPF6e13_TFOdlQw',$,'DOOR-TAG',$,'IfcAnnotation/TEXT',(#1002),(#1021),$);
-#1002=IFCPROPERTYSET('1MUPGQolnDEgp0NxcMN56E',$,'EPset_Annotation',$,(#1003));
+#1001=IFCTYPEPRODUCT('11M3ahhrr9NBdB29YEazzw',$,'DOOR-TAG',$,'IfcAnnotation/TEXT',(#1002),(#1021),$);
+#1002=IFCPROPERTYSET('3xUNoLKPT9kB4LMdoctm5k',$,'EPset_Annotation',$,(#1003));
 #1003=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('door-tag'),$);
 #1004=IFCCARTESIANPOINT((0.,0.,0.));
 #1005=IFCDIRECTION((0.,0.,1.));
@@ -1026,8 +1026,8 @@ DATA;
 #1019=IFCDIRECTION((0.,0.,1.));
 #1020=IFCAXIS2PLACEMENT3D(#1017,#1019,#1018);
 #1021=IFCREPRESENTATIONMAP(#1020,#1016);
-#1022=IFCTYPEPRODUCT('0OuDi3gRH2CxW9mrtE0vXw',$,'WINDOW-TAG',$,'IfcAnnotation/TEXT',(#1023),(#1036),$);
-#1023=IFCPROPERTYSET('2X7dAo_1P5ruRnlKA4kIl6',$,'EPset_Annotation',$,(#1024));
+#1022=IFCTYPEPRODUCT('1eE8Y$BVDFDgG8Fj6d9wiV',$,'WINDOW-TAG',$,'IfcAnnotation/TEXT',(#1023),(#1036),$);
+#1023=IFCPROPERTYSET('2MqzSGkXDBcPSolaAQvYO4',$,'EPset_Annotation',$,(#1024));
 #1024=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('window-tag'),$);
 #1025=IFCCARTESIANPOINT((0.,0.,0.));
 #1026=IFCDIRECTION((0.,0.,1.));
@@ -1041,8 +1041,8 @@ DATA;
 #1034=IFCDIRECTION((0.,0.,1.));
 #1035=IFCAXIS2PLACEMENT3D(#1032,#1034,#1033);
 #1036=IFCREPRESENTATIONMAP(#1035,#1031);
-#1037=IFCTYPEPRODUCT('3WEV_9wQn6AQTESgjW36PH',$,'SPACE-TAG',$,'IfcAnnotation/TEXT',(#1038),(#1063),$);
-#1038=IFCPROPERTYSET('02FAX8dIzAlunWD5ak$6sU',$,'EPset_Annotation',$,(#1039));
+#1037=IFCTYPEPRODUCT('0vvfHSiaPBxewA$32C4LdW',$,'SPACE-TAG',$,'IfcAnnotation/TEXT',(#1038),(#1063),$);
+#1038=IFCPROPERTYSET('2zKuFdTPj3DhNdQ0U2kd5u',$,'EPset_Annotation',$,(#1039));
 #1039=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('space-tag'),$);
 #1040=IFCCARTESIANPOINT((0.,0.,0.));
 #1041=IFCDIRECTION((0.,0.,1.));
@@ -1068,8 +1068,8 @@ DATA;
 #1061=IFCDIRECTION((0.,0.,1.));
 #1062=IFCAXIS2PLACEMENT3D(#1059,#1061,#1060);
 #1063=IFCREPRESENTATIONMAP(#1062,#1058);
-#1064=IFCTYPEPRODUCT('1evqvQLLL1zxdsIWqEn0lK',$,'MATERIAL-TAG',$,'IfcAnnotation/TEXT',(#1065),(#1078),$);
-#1065=IFCPROPERTYSET('2KPJlGyer0UBmphfR7952k',$,'EPset_Annotation',$,(#1066));
+#1064=IFCTYPEPRODUCT('36lTcd9yT8UBNDejQUNWrq',$,'MATERIAL-TAG',$,'IfcAnnotation/TEXT',(#1065),(#1078),$);
+#1065=IFCPROPERTYSET('1x86VNVk1Drwe5XOj$GZX3',$,'EPset_Annotation',$,(#1066));
 #1066=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('rectangle-tag'),$);
 #1067=IFCCARTESIANPOINT((0.,0.,0.));
 #1068=IFCDIRECTION((0.,0.,1.));
@@ -1083,8 +1083,8 @@ DATA;
 #1076=IFCDIRECTION((0.,0.,1.));
 #1077=IFCAXIS2PLACEMENT3D(#1074,#1076,#1075);
 #1078=IFCREPRESENTATIONMAP(#1077,#1073);
-#1079=IFCTYPEPRODUCT('3Nem6d4xX87O3deyWDi3AW',$,'TYPE-TAG',$,'IfcAnnotation/TEXT',(#1080),(#1093),$);
-#1080=IFCPROPERTYSET('15bspgnA9CEuFox6xFjoTL',$,'EPset_Annotation',$,(#1081));
+#1079=IFCTYPEPRODUCT('1rxhEX6I16oPqglXaGZ7Sw',$,'TYPE-TAG',$,'IfcAnnotation/TEXT',(#1080),(#1093),$);
+#1080=IFCPROPERTYSET('3BeqEbDzX0xORamqqSx_kZ',$,'EPset_Annotation',$,(#1081));
 #1081=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('capsule-tag'),$);
 #1082=IFCCARTESIANPOINT((0.,0.,0.));
 #1083=IFCDIRECTION((0.,0.,1.));
@@ -1098,8 +1098,8 @@ DATA;
 #1091=IFCDIRECTION((0.,0.,1.));
 #1092=IFCAXIS2PLACEMENT3D(#1089,#1091,#1090);
 #1093=IFCREPRESENTATIONMAP(#1092,#1088);
-#1094=IFCTYPEPRODUCT('0klFX9AjnEnPBkdIURv8XD',$,'NAME-TAG',$,'IfcAnnotation/TEXT',(#1095),(#1108),$);
-#1095=IFCPROPERTYSET('1d53tifbv2rwcoFFJosiHf',$,'EPset_Annotation',$,(#1096));
+#1094=IFCTYPEPRODUCT('0sws1hxNb2Og1etXqyoEh1',$,'NAME-TAG',$,'IfcAnnotation/TEXT',(#1095),(#1108),$);
+#1095=IFCPROPERTYSET('11L$PtdnX8LfYigzRZ$g0a',$,'EPset_Annotation',$,(#1096));
 #1096=IFCPROPERTYSINGLEVALUE('Symbol',$,IFCLABEL('capsule-tag'),$);
 #1097=IFCCARTESIANPOINT((0.,0.,0.));
 #1098=IFCDIRECTION((0.,0.,1.));
@@ -5,7 +5,7 @@ FILE_NAME('EPset_Drawing.ifc','2020-01-01T00:00:00',(),(),'EPset_Drawing','EPset
 FILE_SCHEMA(('IFC4'));
 ENDSEC;
 DATA;
-#1=IFCPROPERTYSETTEMPLATE('2JhNIvqZrFnAgxfhK0XVQX',$,'EPset_Drawing','',.PSET_OCCURRENCEDRIVEN.,'IfcAnnotation',(#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13,#14,#15,#16,#17,#18,#19,#20,#21,#22));
+#1=IFCPROPERTYSETTEMPLATE('2JhNIvqZrFnAgxfhK0XVQX',$,'EPset_Drawing','',.PSET_OCCURRENCEDRIVEN.,'IfcAnnotation',(#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13,#14,#15,#16,#17,#18,#19,#20,#21,#22,#23));
 #2=IFCSIMPLEPROPERTYTEMPLATE('23JavTMk98ZxXhrUEnjAcf',$,'TargetView','',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
 #3=IFCSIMPLEPROPERTYTEMPLATE('1yVWUt5H9DAOuu0OaMMLpe',$,'Scale','The scale of this drawing represented as a numerator and denominator, such as 1/100',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
 #4=IFCSIMPLEPROPERTYTEMPLATE('3gsuPBtU93b8f0gg1pjkq6',$,'HumanScale','The scale of this drawing in human readable format, such as 1:100',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
@@ -27,5 +27,6 @@ DATA;
 #20=IFCSIMPLEPROPERTYTEMPLATE('0joEq0Rd10cxweEh0NeHT6',$,'JoinCriteria','Comma separated selection keys which determine what cut objects are to be joined.',.P_SINGLEVALUE.,'IfcText',$,$,$,$,$,.READWRITE.);
 #21=IFCSIMPLEPROPERTYTEMPLATE('0nYMT3OSj5gArVniCWZRtv',$,'ShadingStyles','',.P_SINGLEVALUE.,'IfcText',$,$,$,$,$,.READWRITE.);
 #22=IFCSIMPLEPROPERTYTEMPLATE('3VWG22eZXBdQwdKlzMeVQH',$,'CurrentShadingStyle','',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
+#23=IFCSIMPLEPROPERTYTEMPLATE('28mJ$GDxb7kBbKFH_rACMQ',$,'AngleDecimalPlaces','',.P_SINGLEVALUE.,'IfcInteger',$,$,$,$,$,.READWRITE.);
 ENDSEC;
 END-ISO-10303-21;
@@ -27,6 +27,7 @@ import addon_utils
 import ifcopenshell
 import ifcopenshell.api
 import ifcopenshell.util.placement
+import ifcopenshell.util.unit
 import blenderbim.tool as tool
 import blenderbim.core.geometry
 import blenderbim.core.aggregate
@@ -34,6 +35,7 @@ import blenderbim.core.spatial
 import blenderbim.core.style
 from blenderbim.bim.ifc import IfcStore
 from mathutils import Vector
+from typing import Union


 class IfcExporter:
@@ -85,8 +87,8 @@ class IfcExporter:
            self.get_application_name(), tool.Blender.get_blenderbim_version()
        )

-    def sync_all_objects(self):
-        results = []
+    def sync_all_objects(self, skip_unlinking=False) -> list[ifcopenshell.entity_instance]:
+        results: list[ifcopenshell.entity_instance] = []
        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(self.file)
        for ifc_definition_id in list(IfcStore.id_map.keys()):
            obj = IfcStore.id_map[ifc_definition_id]
@@ -95,19 +97,21 @@ class IfcExporter:
                    continue
                if obj.library:
                    continue
-                tool.Collector.sync(obj)
+                tool.Collector.sync(obj, skip_unlinking)
                result = self.sync_object_placement(obj)
                if result:
                    results.append(result)
                result = self.sync_object_material(obj)
+                # TODO: sync_object_material always returns None
+                # so it's never really appended
                if result:
                    results.append(result)
            except ReferenceError:
                pass  # The object is likely deleted
        return results

-    def sync_edited_objects(self):
-        results = []
+    def sync_edited_objects(self) -> list[ifcopenshell.entity_instance]:
+        results: list[ifcopenshell.entity_instance] = []
        for obj in IfcStore.edited_objs.copy():
            if not obj:
                continue
@@ -125,7 +129,7 @@ class IfcExporter:
        IfcStore.edited_objs.clear()
        return results

-    def sync_object_material(self, obj):
+    def sync_object_material(self, obj: bpy.types.Object) -> None:
        if not obj.data or not isinstance(obj.data, bpy.types.Mesh):
            return
        if not self.has_changed_materials(obj):
@@ -136,11 +140,10 @@ class IfcExporter:
        checksum = obj.data.BIMMeshProperties.material_checksum
        return checksum != str([s.id() for s in tool.Geometry.get_styles(obj) if s])

-    def sync_object_placement(self, obj):
+    def sync_object_placement(self, obj: bpy.types.Object) -> Union[ifcopenshell.entity_instance, None]:
        element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
        if not tool.Ifc.is_moved(obj):
            return
-        blender_matrix = np.array(obj.matrix_world)
        if (obj.scale - Vector((1.0, 1.0, 1.0))).length > 1e-4:
            bpy.ops.bim.update_representation(obj=obj.name)
            return element
@@ -151,7 +154,7 @@ class IfcExporter:
        blenderbim.core.geometry.edit_object_placement(tool.Ifc, tool.Geometry, tool.Surveyor, obj=obj)
        return element

-    def sync_grid_axis_object_placement(self, obj, element):
+    def sync_grid_axis_object_placement(self, obj: bpy.types.Object, element: ifcopenshell.entity_instance) -> None:
        grid = (element.PartOfU or element.PartOfV or element.PartOfW)[0]
        grid_obj = tool.Ifc.get_object(grid)
        if grid_obj:
@@ -31,6 +31,7 @@ from blenderbim.bim.module.model.data import AuthoringData
 from blenderbim.bim.module.model.workspace import LIST_OF_TOOLS, TOOLS_TO_CLASSES_MAP
 from mathutils import Vector
 from math import cos, degrees
+from typing import Union


 cwd = os.path.dirname(os.path.realpath(__file__))
@@ -254,60 +255,6 @@ def viewport_shading_changed_callback(area):
        bpy.context.scene.BIMStylesProperties.active_style_type = "External"


-@classmethod
-def poll_check_blender_tab(cls, context):
-    return tool.Blender.is_tab(context, "BLENDER")
-
-
-def get_override_scene_panel(panel_name):
-    original_panel = getattr(bpy.types, panel_name)
-
-    override_panel = type(f"Override_{panel_name}", (original_panel,), {})
-    override_panel.bl_idname = f"{panel_name}_override"
-
-    # some blender panel depend on other and register_class will throw an error
-    # if we won't override their `bl_parent_id`
-    bl_parent_id = getattr(override_panel, "bl_parent_id", None)
-    if bl_parent_id is not None:
-        override_panel.bl_parent_id = f"{bl_parent_id}_override"
-
-    # override poll method
-    poll = getattr(override_panel, "poll", None)
-    if poll is None:
-        override_panel.poll = poll_check_blender_tab
-    else:
-
-        @classmethod
-        def wrapped_poll(cls, context):
-            return super(override_panel, cls).poll(context) and poll_check_blender_tab.__func__(cls, context)
-
-        override_panel.poll = wrapped_poll
-
-    return override_panel
-
-
-# TODO: possibly override scene panels from other addons too?
-# list can be updated from
-# https://projects.blender.org/blender/blender/src/branch/main/scripts/startup/bl_ui/properties_scene.py#L421
-OVERRIDE_SCENE_PANELS = (
-    "SCENE_PT_scene",
-    "SCENE_PT_unit",
-    "SCENE_PT_physics",
-    "SCENE_PT_rigid_body_world",
-    "SCENE_PT_rigid_body_world_settings",
-    "SCENE_PT_rigid_body_cache",
-    "SCENE_PT_rigid_body_field_weights",
-    "SCENE_PT_audio",
-    "SCENE_PT_keying_sets",
-    "SCENE_PT_custom_props",
-    # after SCENE_PT_keying_sets
-    "SCENE_PT_keying_set_paths",
-    "SCENE_PT_keyframing_settings",
-)
-if bpy.app.version >= (4, 0):
-    OVERRIDE_SCENE_PANELS += ("SCENE_PT_simulation",)
-
-
@persistent
 def load_post(scene):
    global global_subscription_owner
@@ -343,15 +290,11 @@ def load_post(scene):
        else:
            bpy.ops.workspace.append_activate(idname="BIM", filepath=os.path.join(cwd, "data", "workspace.blend"))

-        # To improve usability for new users, we hijack the scene properties
-        # tab. We override default scene properties panels with our own poll
-        # to hide them unless the user has chosen to view Blender properties.
-        for panel in OVERRIDE_SCENE_PANELS:
-            if panel in blenderbim.bim.overridden_scene_panels:
-                continue
-            override_panel = get_override_scene_panel(panel)
-            original_panel = getattr(bpy.types, panel)
-            bpy.utils.register_class(override_panel)
-            bpy.utils.unregister_class(original_panel)
-            blenderbim.bim.overridden_scene_panels[panel] = (original_panel, override_panel)
+    # To improve usability for new users, we hijack the scene properties
+    # tab. We override default scene properties panels with our own poll
+    # to hide them unless the user has chosen to view Blender properties.
+    for panel in tool.Blender.get_scene_panels_list():
+        if panel in blenderbim.bim.original_scene_panels_polls:
+            continue
+        tool.Blender.override_scene_panel(panel)
    tool.Blender.setup_tabs()
@@ -29,6 +29,7 @@ from mathutils import geometry
 from mathutils import Vector
 import blenderbim.tool as tool
 from blenderbim.bim.ifc import IfcStore
+from typing import Optional, Callable, Any


 def draw_attributes(props, layout, copy_operator=None, popup_active_attribute=None):
@@ -75,6 +76,10 @@ def draw_attribute(attribute, layout, copy_operator=None):
        op.data_path = attribute.path_from_id("string_value")
    if attribute.is_optional:
        layout.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+    if attribute.name == "GlobalId":
+        layout.operator("bim.generate_global_id", icon="FILE_REFRESH", text="")
+
    if copy_operator:
        op = layout.operator(f"{copy_operator}", text="", icon="COPYDOWN")
        op.name = attribute.name
@@ -116,7 +121,7 @@ def import_attribute(attribute, props, data, callback=None):
    elif is_handled_by_callback is False:
        props.remove(len(props) - 1)
    elif data_type == "string":
-        new.string_value = "" if new.is_null else str(data[attribute.name()])
+        new.string_value = "" if new.is_null else str(data[attribute.name()]).replace("\n", "\\n")
        if attribute.type_of_attribute().declared_type().name() == "IfcURIReference":
            new.is_uri = True
    elif data_type == "boolean":
@@ -178,7 +183,7 @@ def add_attribute_description(attribute_blender, attribute_ifc=None):
        attribute_blender.description = description


-def export_attributes(props, callback=None):
+def export_attributes(props, callback: Optional[Callable] = None) -> dict[str, Any]:
    attributes = {}
    for prop in props:
        is_handled_by_callback = callback(attributes, prop) if callback else False
@@ -216,39 +221,6 @@ def get_enum_items(data, prop_name, context=None):
    return items


-def get_obj_ifc_definition_id(context, obj, obj_type):
-    if obj_type == "Object":
-        return bpy.data.objects.get(obj).BIMObjectProperties.ifc_definition_id
-    elif obj_type == "Material":
-        return bpy.data.materials.get(obj).BIMObjectProperties.ifc_definition_id
-    elif obj_type == "MaterialSet":
-        return ifcopenshell.util.element.get_material(
-            tool.Ifc.get_entity(bpy.data.objects.get(obj)), should_skip_usage=True
-        ).id()
-    elif obj_type == "MaterialSetItem":
-        return bpy.data.objects.get(obj).BIMObjectMaterialProperties.active_material_set_item_id
-    elif obj_type == "Task":
-        return context.scene.BIMTaskTreeProperties.tasks[
-            context.scene.BIMWorkScheduleProperties.active_task_index
-        ].ifc_definition_id
-    elif obj_type == "Cost":
-        return context.scene.BIMCostProperties.cost_items[
-            context.scene.BIMCostProperties.active_cost_item_index
-        ].ifc_definition_id
-    elif obj_type == "Resource":
-        return context.scene.BIMResourceTreeProperties.resources[
-            context.scene.BIMResourceProperties.active_resource_index
-        ].ifc_definition_id
-    elif obj_type == "Profile":
-        return context.scene.BIMProfileProperties.profiles[
-            context.scene.BIMProfileProperties.active_profile_index
-        ].ifc_definition_id
-    elif obj_type == "WorkSchedule":
-        return context.scene.BIMWorkScheduleProperties.active_work_schedule_id
-    elif obj_type == "Group":
-        prop = context.scene.BIMGroupProperties
-        return prop.groups[prop.active_group_index].ifc_definition_id
-
 # hack to close popup
 # https://blender.stackexchange.com/a/202576/130742
 def close_operator_panel(event):
@@ -304,6 +276,9 @@ def draw_filter(layout, filter_groups, data, module):
        op.type = sprops.facet
        op.index = i
        op.module = module
+        op = row.operator("bim.remove_filter_group", text="", icon="X")
+        op.index = i
+        op.module = module

        for j, ifc_filter in enumerate(filter_group.filters):
            if ifc_filter.type == "entity":
@@ -350,11 +325,6 @@ def draw_filter(layout, filter_groups, data, module):
            op.index = j
            op.module = module

-        row = box.row()
-        op = row.operator("bim.remove_filter_group", icon="X")
-        op.index = i
-        op.module = module
-

 # TODO this should move into ifcopenshell.util

@@ -23,33 +23,39 @@ import hashlib
 import zipfile
 import tempfile
 import ifcopenshell
+import ifcopenshell.geom
+import ifcopenshell.ifcopenshell_wrapper
 import blenderbim.bim.handler
 import blenderbim.tool as tool
 from pathlib import Path
 from blenderbim.tool.brick import BrickStore
+from typing import Set, Union, Optional
+
+
+IFC_CONNECTED_TYPE = Union[bpy.types.Material, bpy.types.Object]


 class IfcStore:
-    path = ""
-    file = None
-    schema = None
-    cache = None
-    cache_path = None
-    id_map = {}
-    guid_map = {}
-    edited_objs = set()
-    pset_template_path = ""
-    pset_template_file = None
-    classification_path = ""
-    classification_file = None
-    library_path = ""
-    library_file = None
+    path: str = ""
+    file: ifcopenshell.file = None
+    schema: ifcopenshell.ifcopenshell_wrapper.schema_definition = None
+    cache: ifcopenshell.ifcopenshell_wrapper.HdfSerializer = None
+    cache_path: str = None
+    id_map: dict[int, IFC_CONNECTED_TYPE] = {}
+    guid_map: dict[str, IFC_CONNECTED_TYPE] = {}
+    edited_objs: Set[bpy.types.Object] = set()
+    pset_template_path: str = ""
+    pset_template_file: ifcopenshell.file = None
+    classification_path: str = ""
+    classification_file: ifcopenshell.file = None
+    library_path: str = ""
+    library_file: ifcopenshell.file = None
    current_transaction = ""
    last_transaction = ""
    history = []
    future = []
    schema_identifiers = ["IFC4", "IFC2X3", "IFC4X3"]
-    session_files = {}
+    session_files: dict[str, ifcopenshell.file] = {}

    @staticmethod
    def purge():
@@ -80,8 +86,8 @@ class IfcStore:
            if IfcStore.path:
                try:
                    IfcStore.load_file(IfcStore.path)
-                except:
-                    pass
+                except Exception as e:
+                    print(f"Failed to load file {IfcStore.path}. Error details: {e}")
        return IfcStore.file

    @staticmethod
@@ -117,7 +123,7 @@ class IfcStore:
        IfcStore.get_cache()

    @staticmethod
-    def load_file(path):
+    def load_file(path) -> None:
        if not os.path.isfile(path):
            return
        extension = path.split(".")[-1]
@@ -146,7 +152,7 @@ class IfcStore:
        return IfcStore.schema

    @staticmethod
-    def get_element(id_or_guid):
+    def get_element(id_or_guid: Union[int, str]) -> IFC_CONNECTED_TYPE:
        if isinstance(id_or_guid, int):
            map_object = IfcStore.id_map
        else:
@@ -159,7 +165,7 @@ class IfcStore:
        return obj

    @staticmethod
-    def relink_all_objects():
+    def relink_all_objects() -> None:
        if not IfcStore.get_file():
            return
        for obj in bpy.data.objects:
@@ -172,7 +178,7 @@ class IfcStore:
            IfcStore.relink_object(obj)

    @staticmethod
-    def relink_object(obj):
+    def relink_object(obj: IFC_CONNECTED_TYPE) -> None:
        if not obj:
            return
        if obj.BIMObjectProperties.ifc_definition_id:
@@ -193,7 +199,7 @@ class IfcStore:
            IfcStore.commit_link_element(data)

    @staticmethod
-    def link_element(element, obj):
+    def link_element(element: ifcopenshell.entity_instance, obj: IFC_CONNECTED_TYPE) -> None:
        # Please use tool.Ifc.link() instead of this method. We want to
        # refactor this class and deprecate usage of IfcStore in favour of
        # tools.
@@ -259,7 +265,7 @@ class IfcStore:
        # TODO We're handling id_map and guid_map, but what about edited_objs? This might cause big problems.

    @staticmethod
-    def rollback_unlink_element(data):
+    def rollback_unlink_element(data) -> None:
        if "id" not in data or "obj" not in data:
            return
        obj = bpy.data.objects.get(data["obj"])
@@ -268,13 +274,15 @@ class IfcStore:
            IfcStore.guid_map[data["guid"]] = obj

    @staticmethod
-    def commit_unlink_element(data):
+    def commit_unlink_element(data) -> None:
        del IfcStore.id_map[data["id"]]
        if data["guid"]:
            del IfcStore.guid_map[data["guid"]]

    @staticmethod
-    def unlink_element(element=None, obj=None):
+    def unlink_element(
+        element: Optional[ifcopenshell.entity_instance] = None, obj: Optional[IFC_CONNECTED_TYPE] = None
+    ) -> None:
        if element is None:
            try:
                element = tool.Ifc.get_entity(obj)
@@ -320,7 +328,7 @@ class IfcStore:
            )

    @staticmethod
-    def execute_ifc_operator(operator, context, is_invoke=False):
+    def execute_ifc_operator(operator: bpy.types.Operator, context: bpy.types.Context, is_invoke=False):
        bpy.context.scene.BIMProperties.is_dirty = True
        is_top_level_operator = not bool(IfcStore.current_transaction)

@@ -354,17 +362,17 @@ class IfcStore:
        return result

    @staticmethod
-    def begin_transaction(operator):
+    def begin_transaction(operator: bpy.types.Operator) -> None:
        IfcStore.current_transaction = str(uuid.uuid4())
        operator.transaction_key = IfcStore.current_transaction

    @staticmethod
-    def end_transaction(operator):
+    def end_transaction(operator: bpy.types.Operator) -> None:
        IfcStore.current_transaction = ""
        operator.transaction_key = ""

    @staticmethod
-    def add_transaction_operation(operator, rollback=None, commit=None):
+    def add_transaction_operation(operator: bpy.types.Operator, rollback=None, commit=None) -> None:
        key = getattr(operator, "transaction_key", None)
        data = getattr(operator, "transaction_data", None)
        bpy.context.scene.BIMProperties.last_transaction = key
@@ -380,7 +388,7 @@ class IfcStore:
        IfcStore.future = []

    @staticmethod
-    def undo(until_key=None):
+    def undo(until_key=None) -> None:
        BrickStore.undo()
        if not IfcStore.history:
            return
@@ -395,7 +403,7 @@ class IfcStore:
            IfcStore.future.append(event)

    @staticmethod
-    def redo(until_key=None):
+    def redo(until_key=None) -> None:
        BrickStore.redo()

        if not IfcStore.future:
@@ -32,23 +32,28 @@ import ifcopenshell.geom
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
 import ifcopenshell.util.geolocation
+import ifcopenshell.util.placement
+import ifcopenshell.util.representation
 import blenderbim.tool as tool
+import ifcopenshell.ifcopenshell_wrapper as ifcopenshell_wrapper
 from itertools import chain, accumulate
-from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.ifc import IfcStore, IFC_CONNECTED_TYPE
+from blenderbim.tool.loader import OBJECT_DATA_TYPE
 from blenderbim.bim.module.drawing.prop import ANNOTATION_TYPES_DATA
+from typing import Dict, Union, Optional, Any


 class MaterialCreator:
    def __init__(self, ifc_import_settings: IfcImportSettings, ifc_importer: IfcImporter):
-        self.mesh = None
-        self.obj = None
-        self.materials = {}
-        self.styles = {}
-        self.parsed_meshes = set()
+        self.mesh: bpy.types.Mesh = None
+        self.obj: bpy.types.Object = None
+        self.materials: Dict[int, bpy.types.Material] = {}
+        self.styles: Dict[int, bpy.types.Material] = {}
+        self.parsed_meshes: set[str] = set()
        self.ifc_import_settings = ifc_import_settings
        self.ifc_importer = ifc_importer

-    def create(self, element, obj, mesh):
+    def create(self, element: ifcopenshell.entity_instance, obj: bpy.types.Object, mesh: bpy.types.Mesh) -> None:
        self.mesh = mesh
        # as ifcopenshell triangulates the mesh, we need to merge it to quads again
        self.obj = obj
@@ -64,7 +69,7 @@ class MaterialCreator:
            self.assign_material_slots_to_faces()
        tool.Geometry.record_object_materials(obj)

-    def add_default_material(self, element):
+    def add_default_material(self, element: ifcopenshell.entity_instance) -> None:
        element_material = ifcopenshell.util.element.get_material(element)
        if not element_material:
            return
@@ -82,14 +87,17 @@ class MaterialCreator:
            self.mesh.materials.append(self.materials[material.id()])
            return

-    def load_existing_materials(self):
+    def load_existing_materials(self) -> None:
        for material in bpy.data.materials:
            if material.BIMObjectProperties.ifc_definition_id:
                self.materials[material.BIMObjectProperties.ifc_definition_id] = material
            if material.BIMMaterialProperties.ifc_style_id:
                self.styles[material.BIMMaterialProperties.ifc_style_id] = material

-    def parse_representations(self, element):
+    def parse_representations(self, element: ifcopenshell.entity_instance) -> bool:
+        """Search for styles in in all `element`'s representation items
+        and adds them to `self.mesh.materials`.\n
+        Returns `True` if any styles were found and added, returns `False` otherwise."""
        has_parsed = False
        if hasattr(element, "Representation"):
            for representation in element.Representation.Representations:
@@ -103,7 +111,7 @@ class MaterialCreator:
                    has_parsed = True
        return has_parsed

-    def parse_representation(self, representation):
+    def parse_representation(self, representation: ifcopenshell.entity_instance) -> bool:
        has_parsed = False
        representation_items = self.resolve_all_stylable_representation_items(representation)
        for item in representation_items:
@@ -111,9 +119,9 @@ class MaterialCreator:
                has_parsed = True
        return has_parsed

-    def parse_representation_item(self, item):
+    def parse_representation_item(self, item: ifcopenshell.entity_instance) -> bool:
        if not item.StyledByItem:
-            return
+            return False
        style_ids = []
        styles = list(item.StyledByItem[0].Styles)
        while styles:
@@ -123,11 +131,12 @@ class MaterialCreator:
            elif style.is_a("IfcPresentationStyleAssignment"):
                styles.extend(style.Styles)
        if not style_ids:
-            return
+            return False
        for style_id in style_ids:
            material = self.styles[style_id]

-            def get_ifc_coordinate(material):
+            def get_ifc_coordinate(material: ifcopenshell.entity_instance) -> Union[ifcopenshell.entity_instance, None]:
+                """returns IfcTextureCoordinate"""
                texture_style = tool.Style.get_texture_style(material)
                if not texture_style:
                    return
@@ -148,7 +157,7 @@ class MaterialCreator:
                self.mesh.materials.append(material)
        return True

-    def assign_material_slots_to_faces(self):
+    def assign_material_slots_to_faces(self) -> None:
        if "ios_materials" not in self.mesh or not self.mesh["ios_materials"]:
            return
        if len(self.mesh.materials) == 1:
@@ -156,8 +165,12 @@ class MaterialCreator:
        material_to_slot = {}

        if len(self.mesh.polygons) == len(self.mesh["ios_material_ids"]):
-            for i, material in enumerate(self.mesh["ios_materials"]):
-                slot_index = self.mesh.materials.find(self.styles[material].name)
+            for i, style_or_material_id in enumerate(self.mesh["ios_materials"]):
+                if style_or_material_id in self.styles:
+                    blender_material = self.styles[style_or_material_id]
+                else:
+                    blender_material = self.materials[style_or_material_id]
+                slot_index = self.mesh.materials.find(blender_material.name)
                material_to_slot[i] = slot_index

            material_index = [
@@ -165,7 +178,10 @@ class MaterialCreator:
            ]
            self.mesh.polygons.foreach_set("material_index", material_index)

-    def resolve_all_stylable_representation_items(self, representation):
+    def resolve_all_stylable_representation_items(
+        self, representation: ifcopenshell.entity_instance
+    ) -> list[ifcopenshell.entity_instance]:
+        """returns list of resolved IfcRepresentationItems"""
        items = []
        for item in representation.Items:
            if item.is_a("IfcMappedItem"):
@@ -186,21 +202,27 @@ class IfcImporter:
    def __init__(self, ifc_import_settings):
        self.ifc_import_settings = ifc_import_settings
        self.diff = None
-        self.file = None
-        self.context_settings = []
-        self.gross_context_settings = []
+        self.file: ifcopenshell.file = None
+        self.context_settings: list[ifcopenshell.geom.main.settings] = []
+        self.gross_context_settings: list[ifcopenshell.geom.main.settings] = []
        self.contexts = []
        self.project = None
        self.has_existing_project = False
-        self.collections = {}
-        self.elements = set()
-        self.type_collection = None
+        # element guids to blender collections mapping
+        self.collections: dict[str, bpy.types.Collection] = {}
+        self.elements: set[ifcopenshell.entity_instance] = set()
+        self.annotations: set[ifcopenshell.entity_instance] = set()
+        self.gross_elements: set[ifcopenshell.entity_instance] = set()
+        self.element_types: set[ifcopenshell.entity_instance] = set()
+        self.spatial_elements: set[ifcopenshell.entity_instance] = set()
+        self.type_collection: bpy.types.Collection = None
        self.type_products = {}
        self.meshes = {}
        self.mesh_shapes = {}
        self.time = 0
        self.unit_scale = 1
-        self.added_data = {}
+        # ifc definition ids to blender elements mapping
+        self.added_data: dict[int, IFC_CONNECTED_TYPE] = {}
        self.native_elements = set()
        self.native_data = {}
        self.progress = 0
@@ -439,7 +461,9 @@ class IfcImporter:
            for element in self.gross_elements:
                print(element)

-    def get_spatial_elements_filtered_by_elements(self, elements):
+    def get_spatial_elements_filtered_by_elements(
+        self, elements: set[ifcopenshell.entity_instance]
+    ) -> set[ifcopenshell.entity_instance]:
        leaf_spatial_elements = set([ifcopenshell.util.element.get_container(e) for e in elements])
        results = set()
        for spatial_element in leaf_spatial_elements:
@@ -775,7 +799,7 @@ class IfcImporter:
                continue
            self.create_element_type(element_type)

-    def create_element_type(self, element):
+    def create_element_type(self, element: ifcopenshell.entity_instance) -> None:
        self.ifc_import_settings.logger.info("Creating object %s", element)
        mesh = None
        if self.ifc_import_settings.should_load_geometry:
@@ -832,17 +856,19 @@ class IfcImporter:
            self.create_product(element, mesh=mesh)
        print("Done creating geometry")

-    def create_spatial_elements(self):
-        self.create_generic_elements(self.spatial_elements)
+    def create_spatial_elements(self) -> None:
+        self.create_generic_elements(self.spatial_elements, unselectable=True)

-    def create_elements(self):
+    def create_elements(self) -> None:
        self.create_generic_elements(self.elements)
        tmp = self.context_settings
        self.context_settings = self.gross_context_settings
        self.create_generic_elements(self.gross_elements)
        self.context_settings = tmp

-    def create_generic_shape(self, element):
+    def create_generic_shape(
+        self, element: ifcopenshell.entity_instance
+    ) -> Union[ifcopenshell_wrapper.TriangulationElement, None]:
        for settings in self.context_settings:
            try:
                result = ifcopenshell.geom.create_shape(settings, element)
@@ -851,7 +877,7 @@ class IfcImporter:
            except:
                pass

-    def create_generic_elements(self, elements):
+    def create_generic_elements(self, elements: set[ifcopenshell.entity_instance], unselectable=False) -> None:
        if isinstance(self.file, ifcopenshell.sqlite):
            return self.create_generic_sqlite_elements(elements)

@@ -865,12 +891,17 @@ class IfcImporter:
            elements -= products

        total = len(elements)
+        objects = set()
        for i, element in enumerate(elements):
            if i % 250 == 0:
                print("{} / {} elements processed ...".format(i, total))
-            self.create_product(element)
+            objects.add(self.create_product(element))

-    def create_generic_sqlite_elements(self, elements):
+        if unselectable:
+            for obj in objects:
+                obj.hide_select = True
+
+    def create_generic_sqlite_elements(self, elements: set[ifcopenshell.entity_instance]) -> None:
        self.geometry_cache = self.file.get_geometry([e.id() for e in elements])
        for geometry_id, geometry in self.geometry_cache["geometry"].items():
            mesh_name = tool.Loader.get_mesh_name(type("Geometry", (), {"id": geometry_id}))
@@ -917,7 +948,9 @@ class IfcImporter:
                mesh = self.meshes.get(mesh_name)
            self.create_product(element, mesh=mesh)

-    def create_products(self, products, settings=None):
+    def create_products(
+        self, products, settings: Optional[ifcopenshell.geom.main.settings] = None
+    ) -> set[ifcopenshell.entity_instance]:
        results = set()
        if not products:
            return results
@@ -1040,7 +1073,7 @@ class IfcImporter:
                        return mapped_representation
        return None

-    def create_pointclouds(self, products):
+    def create_pointclouds(self, products: set[ifcopenshell.entity_instance]) -> set[ifcopenshell.entity_instance]:
        result = set()
        for product in products:
            representation = self.get_pointcloud_representation(product)
@@ -1051,7 +1084,9 @@ class IfcImporter:

        return result

-    def create_pointcloud(self, product, representation):
+    def create_pointcloud(
+        self, product: ifcopenshell.entity_instance, representation: ifcopenshell.entity_instance
+    ) -> Union[ifcopenshell.entity_instance, None]:
        placement_matrix = self.get_element_matrix(product)
        vertex_list = []
        for item in representation.Items:
@@ -1079,7 +1114,12 @@ class IfcImporter:
        self.link_element(product, obj)
        return product

-    def create_product(self, element, shape=None, mesh=None):
+    def create_product(
+        self,
+        element: ifcopenshell.entity_instance,
+        shape: Optional[Any] = None,
+        mesh: Optional[OBJECT_DATA_TYPE] = None,
+    ) -> Union[bpy.types.Object, None]:
        if element is None:
            return

@@ -1124,6 +1164,9 @@ class IfcImporter:

        return obj

+    def load_existing_meshes(self) -> None:
+        self.meshes.update({m.name: m for m in bpy.data.meshes})
+
    def get_representation_item_material_name(self, item):
        if not item.StyledByItem:
            return
@@ -1530,18 +1573,19 @@ class IfcImporter:
            "{}/{}".format(self.project["ifc"].is_a(), self.project["ifc"].Name)
        )
        obj = self.create_product(self.project["ifc"])
+        obj.hide_select = True
        self.project["blender"].objects.link(obj)
        self.project["blender"].BIMCollectionProperties.obj = obj
        obj.BIMObjectProperties.collection = self.collections[project.GlobalId] = self.project["blender"]

-    def create_collections(self):
+    def create_collections(self) -> None:
        self.create_spatial_decomposition_collections()
        if self.ifc_import_settings.collection_mode == "DECOMPOSITION":
            self.create_aggregate_and_nest_collections()
        elif self.ifc_import_settings.collection_mode == "SPATIAL_DECOMPOSITION":
            pass

-    def create_spatial_decomposition_collections(self):
+    def create_spatial_decomposition_collections(self) -> None:
        for rel_aggregate in self.project["ifc"].IsDecomposedBy or []:
            self.create_spatial_decomposition_collection(self.project["blender"], rel_aggregate.RelatedObjects)

@@ -1554,7 +1598,9 @@ class IfcImporter:
        tool.Loader.create_project_collection("Views")
        self.type_collection = tool.Loader.create_project_collection("Types")

-    def create_spatial_decomposition_collection(self, parent, related_objects):
+    def create_spatial_decomposition_collection(
+        self, parent: Union[bpy.types.Collection, bpy.types.Object], related_objects: list[ifcopenshell.entity_instance]
+    ) -> None:
        for element in related_objects:
            if element not in self.spatial_elements:
                continue
@@ -1594,7 +1640,11 @@ class IfcImporter:
            ] + [
                r
                for r in self.file.by_type("IfcRelNests")
-                if (r.RelatingObject.is_a("IfcElement") or r.RelatingObject.is_a("IfcElementType"))
+                if (
+                    r.RelatingObject.is_a("IfcElement")
+                    or r.RelatingObject.is_a("IfcElementType")
+                    or (r.RelatingObject.is_a("IfcPositioningElement") and not r.RelatingObject.is_a("IfcGrid"))
+                )
                and [e for e in r.RelatedObjects if not e.is_a("IfcPort")]
            ]

@@ -1604,9 +1654,9 @@ class IfcImporter:
            self.ifc_import_settings.collection_mode = "SPATIAL_DECOMPOSITION"
            return

-        aggregates = {}
+        aggregates: dict[str, dict] = {}
        for rel_aggregate in rel_aggregates:
-            element = rel_aggregate.RelatingObject
+            element: ifcopenshell.entity_instance = rel_aggregate.RelatingObject
            collection = bpy.data.collections.new(tool.Loader.get_name(element))
            aggregates[element.GlobalId] = {"element": element, "collection": collection}
            self.collections[element.GlobalId] = collection
@@ -1658,7 +1708,9 @@ class IfcImporter:
                continue
            self.create_style(style)

-    def create_style(self, style, blender_material=None):
+    def create_style(
+        self, style: ifcopenshell.entity_instance, blender_material: Optional[bpy.types.Material] = None
+    ) -> None:
        if not blender_material:
            name = style.Name or str(style.id())
            blender_material = bpy.data.materials.new(name)
@@ -1675,18 +1727,20 @@ class IfcImporter:
        else:
            blender_material.BIMStyleProperties.active_style_type = "Shading"

-    def place_objects_in_collections(self):
+    def place_objects_in_collections(self) -> None:
        for ifc_definition_id, obj in self.added_data.items():
            if isinstance(obj, bpy.types.Object):
                self.place_object_in_collection(self.file.by_id(ifc_definition_id), obj)

-    def place_object_in_collection(self, element, obj):
+    def place_object_in_collection(self, element: ifcopenshell.entity_instance, obj: bpy.types.Object) -> None:
        if self.ifc_import_settings.collection_mode == "DECOMPOSITION":
            self.place_object_in_decomposition_collection(element, obj)
        elif self.ifc_import_settings.collection_mode == "SPATIAL_DECOMPOSITION":
            self.place_object_in_spatial_decomposition_collection(element, obj)

-    def place_object_in_decomposition_collection(self, element, obj):
+    def place_object_in_decomposition_collection(
+        self, element: ifcopenshell.entity_instance, obj: bpy.types.Object
+    ) -> None:
        if element.is_a("IfcProject"):
            return
        elif element.is_a("IfcGridAxis"):
@@ -1703,10 +1757,12 @@ class IfcImporter:
        elif getattr(element, "Nests", None) and not element.is_a("IfcPort"):
            nest = ifcopenshell.util.element.get_nest(element)
            return self.collections[nest.GlobalId].objects.link(obj)
-        else:
-            return self.place_object_in_spatial_decomposition_collection(element, obj)

-    def place_object_in_spatial_decomposition_collection(self, element, obj):
+        return self.place_object_in_spatial_decomposition_collection(element, obj)
+
+    def place_object_in_spatial_decomposition_collection(
+        self, element: ifcopenshell.entity_instance, obj: bpy.types.Object
+    ) -> None:
        if element.is_a("IfcProject"):
            return
        elif element.is_a("IfcGridAxis"):
@@ -1750,7 +1806,7 @@ class IfcImporter:
            if rel.is_a("IfcRelAssignsToGroup") and rel.RelatingGroup.ObjectType == "DRAWING":
                return rel.RelatingGroup

-    def get_element_matrix(self, element):
+    def get_element_matrix(self, element: ifcopenshell.entity_instance) -> np.array:
        if isinstance(element, ifcopenshell.sqlite_entity):
            result = self.geometry_cache["shapes"][element.id()]["matrix"]
        else:
@@ -1760,7 +1816,7 @@ class IfcImporter:
        result[2][3] *= self.unit_scale
        return result

-    def scale_matrix(self, matrix):
+    def scale_matrix(self, matrix: np.array) -> np.array:
        matrix[0][3] *= self.unit_scale
        matrix[1][3] *= self.unit_scale
        matrix[2][3] *= self.unit_scale
@@ -1792,7 +1848,7 @@ class IfcImporter:
            ):
                return representation.Items[0].MappingTarget

-    def create_curve(self, element, shape):
+    def create_curve(self, element: ifcopenshell.entity_instance, shape) -> bpy.types.Curve:
        if hasattr(shape, "geometry"):
            geometry = shape.geometry
        else:
@@ -1817,12 +1873,13 @@ class IfcImporter:
            polyline.points[-1].co = mathutils.Vector(v2)
        return curve

-    def create_mesh(self, element, shape):
+    def create_mesh(self, element: ifcopenshell.entity_instance, shape) -> bpy.types.Mesh:
        try:
            if hasattr(shape, "geometry"):
-                geometry = shape.geometry
+                # shape is ifcopenshell_wrapper.TriangulationElement
+                geometry: ifcopenshell_wrapper.Triangulation = shape.geometry
            else:
-                geometry = shape
+                geometry: ifcopenshell_wrapper.Triangulation = shape

            mesh = bpy.data.meshes.new(tool.Loader.get_mesh_name(geometry))

@@ -1988,7 +2045,7 @@ class IfcImportSettings:
        self.has_filter = None
        self.should_filter_spatial_elements = True
        self.should_setup_viewport_camera = True
-        self.elements = set()
+        self.elements: set[ifcopenshell.entity_instance] = set()
        self.collection_mode = "DECOMPOSITION"

    @staticmethod
@@ -28,8 +28,11 @@ classes = (
    operator.BIM_OT_select_aggregate,
    operator.BIM_OT_select_parts,
    operator.BIM_OT_aggregate_unassign_object,
+    operator.BIM_OT_break_link_to_other_aggregates,
+    operator.BIM_OT_select_linked_aggregates,
    prop.BIMObjectAggregateProperties,
    ui.BIM_PT_aggregate,
+    ui.BIM_PT_linked_aggregate,
 )


@@ -37,6 +37,7 @@ class AggregateData:
            "has_related_objects": cls.has_related_objects(),
            "total_parts": cls.total_parts(),
            "ifc_class": cls.ifc_class(),
+            "total_linked_aggregate": cls.total_linked_aggregate(),
        }
        cls.is_loaded = True

@@ -72,3 +73,26 @@ class AggregateData:
        element = tool.Ifc.get_entity(bpy.context.active_object)
        if element:
            return element.is_a()
+
+    @classmethod
+    def total_linked_aggregate(cls):
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        aggregate = ifcopenshell.util.element.get_aggregate(element)
+        if not aggregate:
+            return []
+        if not element:
+            return []
+        
+        product_linked_agg_group = [
+            r
+            for r in getattr(aggregate, "HasAssignments", []) or []
+            if r.is_a("IfcRelAssignsToGroup")
+            if "BBIM_Linked_Aggregate" in r.RelatingGroup.Name
+        ]
+
+        if not product_linked_agg_group:
+            return []
+        
+        total = len(product_linked_agg_group[0].RelatedObjects)
+        return total
+        
@@ -44,7 +44,12 @@ class BIM_OT_aggregate_assign_object(bpy.types.Operator, Operator):
    def _execute(self, context):
        relating_obj = None
        if self.relating_object:
-            relating_obj = tool.Ifc.get_object(tool.Ifc.get().by_id(self.relating_object))
+            element = tool.Ifc.get().by_id(self.relating_object)
+            if element.IsDecomposedBy:
+                relating_obj = tool.Ifc.get_object(element)
+            else:
+                assembly = element.Decomposes[0].RelatingObject
+                relating_obj = tool.Ifc.get_object(assembly)
        elif context.active_object:
            relating_obj = context.active_object
        if not relating_obj:
@@ -90,6 +95,12 @@ class BIM_OT_aggregate_unassign_object(bpy.types.Operator, Operator):
                related_obj=tool.Ifc.get_object(element),
            )

+            # Removes Pset related to Linked Aggregates
+            pset = ifcopenshell.util.element.get_pset(element, "BBIM_Linked_Aggregate")
+            if pset:
+                pset = tool.Ifc.get().by_id(pset["id"])
+                ifcopenshell.api.run("pset.remove_pset", tool.Ifc.get(), pset=pset)
+

 class BIM_OT_enable_editing_aggregate(bpy.types.Operator, Operator):
    """Enable editing aggregation relationship"""
@@ -195,15 +206,29 @@ class BIM_OT_select_aggregate(bpy.types.Operator):
    bl_label = "Select Aggregate"
    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
+    select_parts: bpy.props.BoolProperty(default=False)
+
+    @classmethod
+    def description(cls, context, properties):
+        if properties.select_parts:
+            return "Select Aggregate and Parts"
+        else:
+            return "Select Aggregate"

    def execute(self, context):
        self.file = IfcStore.get_file()
        obj = bpy.data.objects.get(self.obj) or context.active_object
        aggregate = ifcopenshell.util.element.get_aggregate(tool.Ifc.get_entity(obj))
        aggregate_obj = tool.Ifc.get_object(aggregate)
+        if self.select_parts:
+            bpy.ops.bim.select_parts(obj=aggregate_obj.name)
        if aggregate_obj in context.selectable_objects:
-            aggregate_obj.select_set(True)
-            bpy.context.view_layer.objects.active = aggregate_obj
+            tool.Blender.set_objects_selection(
+                context,
+                aggregate_obj,
+                [aggregate_obj],
+                clear_previous_selection=not self.select_parts,
+            )
        return {"FINISHED"}


@@ -230,3 +255,65 @@ class BIM_OT_add_part_to_object(bpy.types.Operator, Operator):
            part_class=self.part_class,
            part_name=self.part_name,
        )
+
+
+class BIM_OT_break_link_to_other_aggregates(bpy.types.Operator, Operator):
+    bl_idname = "bim.break_link_to_other_aggregates"
+    bl_label = "Break link to other aggregates"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        aggregate = ifcopenshell.util.element.get_aggregate(element)
+        if not aggregate:
+            return []
+        if not element:
+            return []
+
+        parts = ifcopenshell.util.element.get_parts(aggregate)
+
+        for part in parts:
+            pset = ifcopenshell.util.element.get_pset(part, "BBIM_Linked_Aggregate")
+            pset = tool.Ifc.get().by_id(pset["id"])
+            ifcopenshell.api.run("pset.remove_pset", tool.Ifc.get(), pset=pset)
+
+        linked_aggregate_group = [
+            r.RelatingGroup
+            for r in getattr(aggregate, "HasAssignments", []) or []
+            if r.is_a("IfcRelAssignsToGroup")
+            if "BBIM_Linked_Aggregate" in r.RelatingGroup.Name
+        ]
+        tool.Ifc.run("group.unassign_group", group=linked_aggregate_group[0], products=[aggregate])
+
+        return {"FINISHED"}
+
+
+class BIM_OT_select_linked_aggregates(bpy.types.Operator, Operator):
+    bl_idname = "bim.select_linked_aggregates"
+    bl_label = "Select linked aggregates"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        aggregate = ifcopenshell.util.element.get_aggregate(element)
+        if not aggregate:
+            return []
+        if not element:
+            return []
+
+        linked_aggregate_group = [
+            r.RelatingGroup
+            for r in getattr(aggregate, "HasAssignments", []) or []
+            if r.is_a("IfcRelAssignsToGroup")
+            if "BBIM_Linked_Aggregate" in r.RelatingGroup.Name
+        ]
+
+        for obj in context.selected_objects:
+            obj.select_set(False)
+
+        for rel in linked_aggregate_group[0].IsGroupedBy or []:
+            for element in rel.RelatedObjects:
+                obj = tool.Ifc.get_object(element)
+                obj.select_set(True)
+
+        return {"FINISHED"}
@@ -18,6 +18,7 @@

 from bpy.types import Panel
 from blenderbim.bim.module.aggregate.data import AggregateData
+from blenderbim.bim.module.group.data import GroupsData, ObjectGroupsData
 from blenderbim.bim.ifc import IfcStore


@@ -61,8 +62,12 @@ class BIM_PT_aggregate(Panel):
            row = layout.row(align=True)
            if AggregateData.data["has_relating_object"]:
                row.label(text=AggregateData.data["relating_object_label"], icon="TRIA_UP")
+                op = row.operator("bim.select_aggregate", icon="OBJECT_DATA", text="")
+                op.obj = context.active_object.name
+                op.select_parts = False
                op = row.operator("bim.select_aggregate", icon="RESTRICT_SELECT_OFF", text="")
                op.obj = context.active_object.name
+                op.select_parts = True
                row.operator("bim.enable_editing_aggregate", icon="GREASEPENCIL", text="")
                row.operator("bim.add_aggregate", icon="ADD", text="")
                op = row.operator("bim.aggregate_unassign_object", icon="X", text="")
@@ -96,3 +101,49 @@ class BIM_PT_aggregate(Panel):
            op = layout.operator("bim.add_part_to_object", text="Add " + part_class.lstrip("Ifc"))
            op.part_class = part_class
            op.obj = context.active_object.name
+            
+            
+class BIM_PT_linked_aggregate(Panel):
+    bl_label = "Linked Aggregates"
+    bl_idname = "BIM_PT_linked_aggregate"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+    bl_order = 2
+    bl_parent_id = "BIM_PT_aggregate"
+
+    @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 not IfcStore.get_file().by_id(props.ifc_definition_id).is_a("IfcObjectDefinition"):
+            return False
+        return True
+
+    def draw(self, context):
+        layout = self.layout
+        if not AggregateData.is_loaded:
+            AggregateData.load()
+
+        props = context.active_object.BIMObjectAggregateProperties
+        row = layout.row(align=True)
+        row.label(text="Advanced Users Only", icon="ERROR")
+        row = layout.row(align=True)
+        
+        if type(AggregateData.data['total_linked_aggregate']) is int:
+            if AggregateData.data['total_linked_aggregate'] > 0:
+                row.label(text=f"{AggregateData.data['total_linked_aggregate']} Linked Aggregates")
+                row.operator("bim.select_linked_aggregates", text="", icon="RESTRICT_SELECT_OFF")
+                row.operator("bim.refresh_linked_aggregate", text="", icon="FILE_REFRESH")
+                op = row.operator("bim.break_link_to_other_aggregates", text="", icon="X")
+        else:
+            row.label(text="No Linked Aggregates")
+            
+        
+
@@ -120,20 +120,46 @@ class EditAttributes(bpy.types.Operator, Operator):
        return {"FINISHED"}


-class GenerateGlobalId(bpy.types.Operator):
+class GenerateGlobalId(bpy.types.Operator, Operator):
    bl_idname = "bim.generate_global_id"
    bl_label = "Regenerate GlobalId"
+    bl_description = "Regenerate GlobalId\n\nSHIFT+CLICK to regenerate GlobalIds for all selected objects"
    bl_options = {"REGISTER", "UNDO"}

-    def execute(self, context):
-        index = context.active_object.BIMAttributeProperties.attributes.find("GlobalId")
-        if index >= 0:
-            global_id = context.active_object.BIMAttributeProperties.attributes[index]
+    use_selected: bpy.props.BoolProperty(name="Use All Selected Objects", default=False, options={"SKIP_SAVE"})
+
+    def invoke(self, context, event):
+        # using all selected objects on shift+click
+        # make sure to use SKIP_SAVE on property, otherwise it might get stuck
+        if event.type == "LEFTMOUSE" and event.shift:
+            self.use_selected = True
+        return self.execute(context)
+
+    def _execute(self, context):
+        if self.use_selected:
+            for obj in context.selected_objects:
+                element = tool.Ifc.get_entity(obj)
+                if not element or not element.is_a("IfcRoot"):
+                    continue
+                element.GlobalId = ifcopenshell.guid.new()
+
+        obj = context.active_object
+        if not obj or not obj.BIMAttributeProperties.is_editing_attributes:
+            return {"FINISHED"}
+
+        props = obj.BIMAttributeProperties
+        element = tool.Ifc.get_entity(obj)
+
+        if not element.is_a("IfcRoot"):
+            return {"FINISHED"}
+
+        if self.use_selected and obj in context.selected_objects:
+            # guid value was already regenerated, just update the ui prop
+            guid_value = element.GlobalId
        else:
-            global_id = context.active_object.BIMAttributeProperties.attributes.add()
-        global_id.name = "GlobalId"
-        global_id.data_type = "string"
-        global_id.string_value = ifcopenshell.guid.new()
+            guid_value = ifcopenshell.guid.new()
+
+        props.attributes["GlobalId"].string_value = guid_value
        return {"FINISHED"}


@@ -22,6 +22,7 @@ from . import ui, operator, prop
 classes = (
    operator.AddBoundary,
    operator.ColourByRelatedBuildingElement,
+    operator.DecorateBoundaries,
    operator.DisableEditingBoundary,
    operator.DisableEditingBoundaryGeometry,
    operator.EditBoundaryAttributes,
@@ -24,6 +24,7 @@ import mathutils
 import numpy as np
 import multiprocessing
 import ifcopenshell.api
+import ifcopenshell.geom
 import ifcopenshell.util.unit
 import ifcopenshell.util.shape
 import ifcopenshell.util.element
@@ -37,6 +38,7 @@ from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.module.model.decorator import ProfileDecorator
 from blenderbim.bim.module.boundary.decorator import BoundaryDecorator
 import blenderbim.core
+import blenderbim.core.geometry


 def get_boundaries_collection(blender_space):
@@ -147,7 +149,9 @@ class Loader:
        self.ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
        self.ifc_importer.file = self.ifc_file

-    def load_boundary(self, boundary, blender_space=None):
+    def load_boundary(
+        self, boundary: ifcopenshell.entity_instance, blender_space: bpy.types.Object = None
+    ) -> bpy.types.Object:
        if not blender_space:
            if not boundary.RelatingSpace:
                self.operator.report(
@@ -509,10 +513,10 @@ class DisableEditingBoundaryGeometry(bpy.types.Operator, tool.Ifc.Operator):
 class ShowBoundaries(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.show_boundaries"
    bl_label = "Show Boundaries"
+    bl_description = "Load selected objects boundaries if they are not loaded"
    bl_options = {"REGISTER", "UNDO"}

    def _execute(self, context):
-        props = bpy.context.scene.BIMBoundaryProperties
        loader = Loader(self)
        for obj in context.selected_objects:
            element = tool.Ifc.get_entity(obj)
@@ -524,7 +528,7 @@ class ShowBoundaries(bpy.types.Operator, tool.Ifc.Operator):
            for rel in element.BoundedBy or []:
                boundary_obj = loader.load_boundary(rel, obj)
                tool.Boundary.decorate_boundary(boundary_obj)
-        BoundaryDecorator.install(bpy.context)
+        BoundaryDecorator.install(context)
        return {"FINISHED"}


@@ -557,6 +561,36 @@ class HideBoundaries(bpy.types.Operator, tool.Ifc.Operator):
        return {"FINISHED"}


+class DecorateBoundaries(bpy.types.Operator, tool.Ifc.Operator):
+    bl_idname = "bim.decorate_boundaries"
+    bl_label = "Toggle Boundaries Decorations"
+    bl_description = "Add special decorations for all boundaries in the scene or hide them if they are already added"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        props = context.scene.BIMBoundaryProperties
+        # filter not decorated boundaries and add decorations for them
+        decorated_boundaries = set([i.obj for i in props.boundaries])
+        active_boundaries = set()
+        for element in tool.Ifc.get().by_type("IfcRelSpaceBoundary"):
+            obj = tool.Ifc.get_object(element)
+            if obj is not None:
+                active_boundaries.add(obj)
+
+        boundaries_to_decorate = active_boundaries - decorated_boundaries
+        if boundaries_to_decorate:
+            for obj in boundaries_to_decorate:
+                tool.Boundary.decorate_boundary(obj)
+            BoundaryDecorator.install(context)
+        else:
+            for obj in decorated_boundaries:
+                tool.Boundary.undecorate_boundary(obj)
+            props.boundaries.clear()
+            BoundaryDecorator.uninstall()
+            tool.Blender.update_viewport()
+        return {"FINISHED"}
+
+
 class AddBoundary(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.add_boundary"
    bl_label = "Add Boundary"
@@ -37,7 +37,7 @@ classes = (

 def register():
    if not bpy.app.background:
-        bpy.utils.register_tool(workspace.CadTool, after={"builtin.transform"}, separator=True, group=True)
+        bpy.utils.register_tool(workspace.CadTool, after={"builtin.transform"}, separator=True, group=False)
    bpy.types.Scene.BIMCadProperties = bpy.props.PointerProperty(type=prop.BIMCadProperties)


@@ -24,10 +24,10 @@ from math import pi

 class BIMCadProperties(PropertyGroup):
    resolution: bpy.props.IntProperty(name="Arc Resolution", min=1, default=1)
-    radius: bpy.props.FloatProperty(name="Radius", default=0.1)
-    distance: bpy.props.FloatProperty(name="Distance", default=0.1)
-    x: bpy.props.FloatProperty(name="X", default=0.2)
-    y: bpy.props.FloatProperty(name="Y", default=0.1)
+    radius: bpy.props.FloatProperty(name="Radius", default=0.1, subtype="DISTANCE")
+    distance: bpy.props.FloatProperty(name="Distance", default=0.1, subtype="DISTANCE")
+    x: bpy.props.FloatProperty(name="X", default=0.2, subtype="DISTANCE")
+    y: bpy.props.FloatProperty(name="Y", default=0.1, subtype="DISTANCE")
    gable_roof_edge_angle: bpy.props.FloatProperty(
        name="Gable Roof Edge Angle", default=pi / 2, soft_min=0, soft_max=pi / 2, subtype="ANGLE"
    )
@@ -20,6 +20,7 @@ import os
 import bpy
 import blenderbim.tool as tool
 import blenderbim.bim.module.type.prop as type_prop
+import ifcopenshell.util.unit
 from bpy.types import WorkSpaceTool
 from blenderbim.bim.module.model.data import AuthoringData, RailingData, RoofData

@@ -239,8 +240,9 @@ class CadHotkey(bpy.types.Operator):
                row.prop(props, "resolution")

    def hotkey_S_C(self):
+        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
        if self.is_profile():
-            bpy.ops.bim.add_ifccircle(radius=self.props.radius)
+            bpy.ops.bim.add_ifccircle(radius=self.props.radius / si_conversion)
        else:
            bpy.ops.bim.cad_arc_from_2_points()

@@ -248,13 +250,15 @@ class CadHotkey(bpy.types.Operator):
        bpy.ops.bim.cad_trim_extend()

    def hotkey_S_F(self):
+        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
        if self.is_profile():
-            bpy.ops.bim.add_ifcarcindex_fillet(radius=self.props.radius)
+            bpy.ops.bim.add_ifcarcindex_fillet(radius=self.props.radius / si_conversion)
        else:
-            bpy.ops.bim.cad_fillet(resolution=self.props.resolution, radius=self.props.radius)
+            bpy.ops.bim.cad_fillet(resolution=self.props.resolution, radius=self.props.radius / si_conversion)

    def hotkey_S_O(self):
-        bpy.ops.bim.cad_offset(distance=self.props.distance)
+        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
+        bpy.ops.bim.cad_offset(distance=self.props.distance / si_conversion)

    def hotkey_S_Q(self):
        element = tool.Ifc.get_entity(bpy.context.active_object)
@@ -270,7 +274,8 @@ class CadHotkey(bpy.types.Operator):

    def hotkey_S_R(self):
        if self.is_profile():
-            bpy.ops.bim.add_rectangle(x=self.props.x, y=self.props.y)
+            si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
+            bpy.ops.bim.add_rectangle(x=self.props.x / si_conversion, y=self.props.y / si_conversion)
        elif (
            (RoofData.is_loaded or not RoofData.load())
            and RoofData.data["pset_data"]
@@ -25,15 +25,12 @@ classes = (
    operator.ExecuteIfcClash,
    operator.ExportClashSets,
    operator.ImportClashSets,
-    operator.LoadIfcClashes,
-    operator.SaveIfcClashes,
    operator.LoadSmartGroupsForActiveClashSet,
    operator.RemoveClashSet,
    operator.RemoveClashSource,
    operator.SelectClash,
    operator.SelectClashResults,
    operator.SelectClashSource,
-    operator.SelectIfcClashResults,
    operator.SelectSmartGroup,
    operator.SelectSmartGroupedClashesPath,
    operator.SmartClashGroup,
@@ -44,7 +41,6 @@ classes = (
    prop.BIMClashProperties,
    ui.BIM_PT_ifcclash,
    ui.BIM_PT_clash_manager,
-    ui.BIM_PT_dumb_clash_manager,
    ui.BIM_PT_smart_clash_manager,
    ui.BIM_UL_clashes,
    ui.BIM_UL_clash_sets,
@@ -0,0 +1,52 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import json
+import ifcopenshell.util.element
+import blenderbim.tool as tool
+
+
+def refresh():
+    ClashData.is_loaded = False
+
+
+class ClashData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.is_loaded = True
+        cls.data = {}
+        cls.data["saved_searches"] = cls.saved_searches()
+
+    @classmethod
+    def saved_searches(cls):
+        if not tool.Ifc.get():
+            return []
+        groups = tool.Ifc.get().by_type("IfcGroup")
+        results = []
+        for group in groups:
+            try:
+                data = json.loads(group.Description)
+                if isinstance(data, dict) and data.get("type", None) == "BBIM_Search" and data.get("query", None):
+                    results.append(group)
+            except:
+                pass
+        return [(str(g.id()), g.Name or "Unnamed", "") for g in sorted(results, key=lambda x: x.Name or "Unnamed")]
@@ -0,0 +1,102 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import blf
+import gpu
+import bmesh
+import blenderbim.tool as tool
+from bpy.types import SpaceView3D
+from mathutils import Vector
+from gpu_extras.batch import batch_for_shader
+from bpy_extras.view3d_utils import location_3d_to_region_2d
+
+
+class ClashDecorator:
+    is_installed = False
+    handlers = []
+
+    @classmethod
+    def install(cls, context):
+        if cls.is_installed:
+            cls.uninstall()
+        handler = cls()
+        cls.handlers.append(SpaceView3D.draw_handler_add(handler.draw_text, (context,), "WINDOW", "POST_PIXEL"))
+        cls.handlers.append(SpaceView3D.draw_handler_add(handler.draw_geometry, (context,), "WINDOW", "POST_VIEW"))
+        cls.is_installed = True
+
+    @classmethod
+    def uninstall(cls):
+        for handler in cls.handlers:
+            try:
+                SpaceView3D.draw_handler_remove(handler, "WINDOW")
+            except ValueError:
+                pass
+        cls.is_installed = False
+
+    def draw_batch(self, shader_type, content_pos, color, indices=None):
+        shader = self.line_shader if shader_type == "LINES" else self.shader
+        batch = batch_for_shader(shader, shader_type, {"pos": content_pos}, indices=indices)
+        shader.uniform_float("color", color)
+        batch.draw(shader)
+
+    def draw_text(self, context):
+        self.addon_prefs = context.preferences.addons["blenderbim"].preferences
+        selected_elements_color = self.addon_prefs.decorator_color_selected
+        unselected_elements_color = self.addon_prefs.decorator_color_unselected
+        special_elements_color = self.addon_prefs.decorator_color_special
+
+        text = context.scene.BIMClashProperties.active_clash_text
+        p = context.scene.BIMClashProperties.p1.lerp(context.scene.BIMClashProperties.p2, 0.5)
+
+        font_id = 0
+        blf.size(font_id, 12)
+        coords_2d = location_3d_to_region_2d(context.region, context.region_data, p)
+        color = self.addon_prefs.decorations_colour
+        blf.color(font_id, *color)
+        if coords_2d:
+            w, h = blf.dimensions(font_id, text)
+            coords_2d -= Vector((w * .5, 0))
+            blf.position(font_id, coords_2d[0], coords_2d[1], 0)
+            blf.draw(font_id, text)  # Set your text here
+
+    def draw_geometry(self, context):
+        self.addon_prefs = context.preferences.addons["blenderbim"].preferences
+        selected_elements_color = self.addon_prefs.decorator_color_selected
+        unselected_elements_color = self.addon_prefs.decorator_color_unselected
+        special_elements_color = self.addon_prefs.decorator_color_special
+
+        gpu.state.point_size_set(6)
+        gpu.state.blend_set("ALPHA")
+
+        self.line_shader = gpu.shader.from_builtin("POLYLINE_UNIFORM_COLOR")
+        self.line_shader.bind()  # required to be able to change uniforms of the shader
+        # POLYLINE_UNIFORM_COLOR specific uniforms
+        self.line_shader.uniform_float("viewportSize", (context.region.width, context.region.height))
+        self.line_shader.uniform_float("lineWidth", 2.0)
+
+        # general shader
+        self.shader = gpu.shader.from_builtin("UNIFORM_COLOR")
+
+        selected_vertices = [context.scene.BIMClashProperties.p1, context.scene.BIMClashProperties.p2]
+        selected_edges = []
+        if selected_vertices[0] != selected_vertices[1]:
+            selected_edges = [[0, 1]]
+
+        self.draw_batch("POINTS", selected_vertices, special_elements_color)
+        if selected_edges:
+            self.draw_batch("LINES", selected_vertices, special_elements_color, selected_edges)
@@ -23,10 +23,11 @@ import bmesh
 import logging
 import numpy as np
 import ifcopenshell
-from mathutils import Matrix, Vector
-from math import radians
-from blenderbim.bim.ifc import IfcStore
 import blenderbim.tool as tool
+from math import radians
+from mathutils import Matrix, Vector
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.clash.decorator import ClashDecorator


 class ExportClashSets(bpy.types.Operator):
@@ -45,18 +46,7 @@ class ExportClashSets(bpy.types.Operator):

    def execute(self, context):
        self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
-        clash_sets = []
-        for clash_set in context.scene.BIMClashProperties.clash_sets:
-            self.a = []
-            self.b = []
-            for ab in ["a", "b"]:
-                for data in getattr(clash_set, ab):
-                    clash_source = {"file": data.name}
-                    if data.selector:
-                        clash_source["selector"] = data.selector
-                        clash_source["mode"] = data.mode
-                    getattr(self, ab).append(clash_source)
-            clash_sets.append({"name": clash_set.name, "tolerance": clash_set.tolerance, "a": self.a, "b": self.b})
+        clash_sets = tool.Clash.export_clash_sets()
        with open(self.filepath, "w") as destination:
            destination.write(json.dumps(clash_sets, indent=4))
        return {"FINISHED"}
@@ -78,25 +68,34 @@ class ImportClashSets(bpy.types.Operator):
        return {"RUNNING_MODAL"}

    def execute(self, context):
-        with open(self.filepath) as f:
-            clash_sets = json.load(f)
-        for clash_set in clash_sets:
+        tool.Clash.load_clash_sets(self.filepath)
+        context.scene.BIMClashProperties.clash_sets.clear()
+        for clash_set in tool.Clash.get_clash_sets():
            new = context.scene.BIMClashProperties.clash_sets.add()
            new.name = clash_set["name"]
-            new.tolerance = clash_set["tolerance"]
+            new.mode = clash_set["mode"]
+            if new.mode == "intersection":
+                new.tolerance = clash_set["tolerance"]
+                new.check_all = clash_set["check_all"]
+            elif new.mode == "collision":
+                new.allow_touching = clash_set["allow_touching"]
+            elif new.mode == "clearance":
+                new.clearance = clash_set["clearance"]
+                new.check_all = clash_set["check_all"]
            for clash_source in clash_set["a"]:
                new_source = new.a.add()
                new_source.name = clash_source["file"]
                if "selector" in clash_source:
-                    new_source.selector = clash_source["selector"]
+                    tool.Search.import_filter_query(clash_source["selector"], new_source.filter_groups)
                    new_source.mode = clash_source["mode"]
-            if clash_set["b"]:
+            if "b" in clash_set and clash_set["b"]:
                for clash_source in clash_set["b"]:
                    new_source = new.b.add()
                    new_source.name = clash_source["file"]
                    if "selector" in clash_source:
-                        new_source.selector = clash_source["selector"]
+                        tool.Search.import_filter_query(clash_source["selector"], new_source.filter_groups)
                        new_source.mode = clash_source["mode"]
+        tool.Clash.import_active_clashes()
        return {"FINISHED"}


@@ -109,7 +108,6 @@ class AddClashSet(bpy.types.Operator):
    def execute(self, context):
        new = context.scene.BIMClashProperties.clash_sets.add()
        new.name = "New Clash Set"
-        new.tolerance = 0.01
        return {"FINISHED"}


@@ -211,8 +209,11 @@ class ExecuteIfcClash(bpy.types.Operator):

    def invoke(self, context, event):
        _, extension = os.path.splitext(self.filepath)
-        if extension != ".json":
-            self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".bcf")
+        if extension != ".bcf":
+            self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".json")
+        # TODO Temporarily until BCF support comes back
+        # if extension != ".json":
+        #     self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".bcf")
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {"RUNNING_MODAL"}
@@ -220,7 +221,12 @@ class ExecuteIfcClash(bpy.types.Operator):
    def execute(self, context):
        from ifcclash import ifcclash

+        self.props = context.scene.BIMClashProperties
+
        _, extension = os.path.splitext(self.filepath)
+        if extension != ".bcf":
+            self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
+        # TODO Temporarily until BCF support comes back
        if extension != ".json":
            self.filepath = bpy.path.ensure_ext(self.filepath, ".bcf")

@@ -230,7 +236,7 @@ class ExecuteIfcClash(bpy.types.Operator):
        settings.logger.setLevel(logging.DEBUG)
        clasher = ifcclash.Clasher(settings)

-        if context.scene.BIMClashProperties.should_create_clash_snapshots:
+        if self.props.should_create_clash_snapshots:

            def get_viewpoint_snapshot(viewpoint):
                camera = bpy.data.objects.get("IFC Clash Camera")
@@ -271,23 +277,13 @@ class ExecuteIfcClash(bpy.types.Operator):

            clasher.get_viewpoint_snapshot = get_viewpoint_snapshot

-        clasher.clash_sets = []
-        for clash_set in context.scene.BIMClashProperties.clash_sets:
-            self.a = []
-            self.b = []
-            for ab in ["a", "b"]:
-                for data in getattr(clash_set, ab):
-                    clash_source = {"file": data.name}
-                    if data.selector:
-                        clash_source["selector"] = data.selector
-                        clash_source["mode"] = data.mode
-                    getattr(self, ab).append(clash_source)
-            clash_set_data = {"name": clash_set.name, "tolerance": clash_set.tolerance, "a": self.a}
-            if self.b:
-                clash_set_data["b"] = self.b
-            clasher.clash_sets.append(clash_set_data)
+        clasher.clash_sets = tool.Clash.export_clash_sets()
        clasher.clash()
        clasher.export()
+
+        if extension == ".json":
+            tool.Clash.load_clash_sets(self.filepath)
+            tool.Clash.import_active_clashes()
        return {"FINISHED"}


@@ -306,6 +302,7 @@ class SelectIfcClashResults(bpy.types.Operator):
        return {"RUNNING_MODAL"}

    def execute(self, context):
+        # TODO refactor into new clash results system
        self.file = IfcStore.get_file()
        self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
        with open(self.filepath) as f:
@@ -352,83 +349,6 @@ class SelectIfcClashResults(bpy.types.Operator):
        return {"FINISHED"}


-class LoadIfcClashes(bpy.types.Operator):
-    bl_idname = "bim.load_ifc_clashes"
-    bl_label = "Load IFC Clashes"
-    bl_options = {"REGISTER", "UNDO"}
-    bl_description = "Load the clashing IFC geometry stored in a file"
-    filename_ext = ".json"
-    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
-
-    def invoke(self, context, event):
-        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".json")
-        WindowManager = context.window_manager
-        WindowManager.fileselect_add(self)
-        return {"RUNNING_MODAL"}
-
-    def execute(self, context):
-        self.file = IfcStore.get_file()
-        self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
-        with open(self.filepath) as f:
-            clash_sets_json = json.load(f)
-        active_clash_set = context.scene.BIMClashProperties.active_clash_set
-
-        for clash_set in clash_sets_json:
-            if not "clashes" in clash_set.keys():
-                self.report({"WARNING"}, "No clashes found for the selected Clash Set.")
-                return {"CANCELLED"}
-            active_clash_set.clashes.clear()
-            for clash in clash_set["clashes"].values():
-                blender_clash = active_clash_set.clashes.add()
-                blender_clash.a_global_id = clash["a_global_id"]
-                blender_clash.b_global_id = clash["b_global_id"]
-                blender_clash.a_name = "{}/{}".format(clash["a_ifc_class"], clash["a_name"])
-                blender_clash.b_name = "{}/{}".format(clash["b_ifc_class"], clash["b_name"])
-                blender_clash.status = False if not "status" in clash.keys() else clash["status"]
-        return {"FINISHED"}
-
-
-class SaveIfcClashes(bpy.types.Operator):
-    bl_idname = "bim.save_ifc_clashes"
-    bl_label = "Save IFC Clashes"
-    bl_options = {"REGISTER", "UNDO"}
-    bl_description = "Save the clashing IFC geometry stored in a file"
-    filename_ext = ".json"
-    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
-
-    def invoke(self, context, event):
-        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".json")
-        WindowManager = context.window_manager
-        WindowManager.fileselect_add(self)
-        return {"RUNNING_MODAL"}
-
-    def execute(self, context):
-        self.file = IfcStore.get_file()
-        self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
-        clash_sets_json = self.load_json()
-        active_clash_set = context.scene.BIMClashProperties.active_clash_set
-        self.update_clash_sets(clash_sets_json, active_clash_set)
-        self.save_json(clash_sets_json)
-        return {"FINISHED"}
-
-    def load_json(self):
-        with open(self.filepath) as f:
-            return json.load(f)
-
-    def update_clash_sets(self, clash_sets_json, active_clash_set):
-        for clash_set in clash_sets_json:
-            if clash_set["name"] != active_clash_set.name or "clashes" not in clash_set.keys():
-                continue
-            for clash in active_clash_set.clashes:
-                clash_key = clash.a_global_id + "-" + clash.b_global_id
-                if clash_set.get("clashes", {}).get(clash_key, None) is not None:
-                    clash_set["clashes"][clash_key]["status"] = clash.status
-
-    def save_json(self, clash_sets_json):
-        with open(self.filepath, "w") as destination:
-            json.dump(clash_sets_json, destination, indent=4)
-
-
 class SelectClash(bpy.types.Operator):
    bl_idname = "bim.select_clash"
    bl_label = "Select Clash"
@@ -437,31 +357,29 @@ class SelectClash(bpy.types.Operator):
    index: bpy.props.IntProperty()

    def execute(self, context):
-        clash = context.scene.BIMClashProperties.active_clash
+        self.props = context.scene.BIMClashProperties
+        clash_set = tool.Clash.get_clash_set(self.props.active_clash_set.name)
+        active_clash = self.props.active_clash
+        clash = tool.Clash.get_clash(clash_set, active_clash.a_global_id, active_clash.b_global_id)
+
+        if not clash:
+            return {"FINISHED"}

        products = []
-        linked_objects = []
-        try:
-            products.append(tool.Ifc.get().by_guid(clash.a_global_id))
-        except:
-            linked_objects.append(clash.a_name)
-        try:
-            products.append(tool.Ifc.get().by_guid(clash.b_global_id))
-        except:
-            linked_objects.append(clash.b_name)
+
+        for global_id in (clash["a_global_id"], clash["b_global_id"]):
+            try:
+                products.append(tool.Ifc.get().by_guid(global_id))
+            except:
+                pass

        tool.Spatial.select_products(products, unhide=True)
-        print(linked_objects)
-        for obj_name in linked_objects:
-            obj = bpy.data.objects.get(obj_name)
-            if obj:
-                obj.select_set(True)
-            else:
-                print("Object not found:", obj_name)
-        if context.scene.BIMClashProperties.sould_focus_on_clash:
-            context_override = tool.Blender.get_viewport_context()
-            with bpy.context.temp_override(**context_override):
-                bpy.ops.view3d.view_selected()
+        ClashDecorator.install(bpy.context)
+        target = Vector(clash["p1"])
+        tool.Clash.look_at(target, target + Vector((5, 5, 5)))
+        self.props.p1 = clash["p1"]
+        self.props.p2 = clash["p2"]
+        self.props.active_clash_text = clash["type"].title() + " " + str(round(clash["distance"] * 1000)) + "mm"
        return {"FINISHED"}


@@ -17,7 +17,7 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import bpy
-from blenderbim.bim.prop import StrProperty, Attribute
+from blenderbim.bim.prop import StrProperty, Attribute, BIMFilterGroup
 from bpy.types import PropertyGroup
 from bpy.props import (
    PointerProperty,
@@ -33,11 +33,12 @@ from bpy.props import (

 class ClashSource(PropertyGroup):
    name: StringProperty(name="File")
-    selector: StringProperty(name="Selector")
+    filter_groups: CollectionProperty(type=BIMFilterGroup, name="Filter Groups")
    mode: EnumProperty(
        items=[
-            ("i", "Include", "Only the selected objects are included for clashing"),
-            ("e", "Exclude", "All objects except the selected objects are included for clashing"),
+            ("a", "All Elements", "All elements will be used for clashing"),
+            ("i", "Include", "Only the selected elements are included for clashing"),
+            ("e", "Exclude", "All elements except the selected elements are included for clashing"),
        ],
        name="Mode",
    )
@@ -53,7 +54,24 @@ class Clash(PropertyGroup):

 class ClashSet(PropertyGroup):
    name: StringProperty(name="Name")
-    tolerance: FloatProperty(name="Tolerance")
+    mode: EnumProperty(
+        items=[
+            (
+                "intersection",
+                "Intersection",
+                "Detect objects that protrude or pierce another object",
+                "PIVOT_MEDIAN",
+                1,
+            ),
+            ("collision", "Collision", "Detect touching objects with any surface collision", "PIVOT_INDIVIDUAL", 2),
+            ("clearance", "Clearance", "Detect objects within a proximity threshold", "PIVOT_ACTIVE", 3),
+        ],
+        name="Mode",
+    )
+    tolerance: FloatProperty(name="Tolerance", default=0.002)
+    clearance: FloatProperty(name="Clearance", default=0.01)
+    allow_touching: BoolProperty(name="Allow Touching", default=False)
+    check_all: BoolProperty(name="Check All", default=False)
    a: CollectionProperty(name="Group A", type=ClashSource)
    b: CollectionProperty(name="Group B", type=ClashSource)
    clashes: CollectionProperty(name="Clashes", type=Clash)
@@ -78,22 +96,21 @@ class BIMClashProperties(PropertyGroup):
    smart_clash_grouping_max_distance: IntProperty(
        name="Smart Clash Grouping Max Distance", default=3, soft_min=1, soft_max=10
    )
-    sould_focus_on_clash: BoolProperty(name="Show Focus Clash", default=False)
+    p1: FloatVectorProperty(name="P1", default=(0.0, 0.0, 0.0), subtype="XYZ")
+    p2: FloatVectorProperty(name="P2", default=(0.0, 0.0, 0.0), subtype="XYZ")
+    active_clash_text: StringProperty(name="Active Clash Text")

    @property
    def active_clash_set(self):
-        if not self.clash_sets:
-            return None
-        return self.clash_sets[self.active_clash_set_index]
+        if self.active_clash_set_index < len(self.clash_sets):
+            return self.clash_sets[self.active_clash_set_index]

    @property
    def active_smart_group(self):
-        if not self.smart_clash_groups:
-            return None
-        return self.smart_clash_groups[self.active_smart_group_index]
+        if self.active_smart_group_index < len(self.smart_clash_groups):
+            return self.smart_clash_groups[self.active_smart_group_index]

    @property
    def active_clash(self):
-        if not self.active_clash_set:
-            return None
-        return self.active_clash_set.clashes[self.active_clash_index]
+        if self.active_clash_index < len(self.active_clash_set.clashes):
+            return self.active_clash_set.clashes[self.active_clash_index]
@@ -17,7 +17,9 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import bpy
+import blenderbim.bim.helper
 from bpy.types import Panel
+from blenderbim.bim.module.clash.data import ClashData


 class BIM_PT_ifcclash(Panel):
@@ -30,6 +32,9 @@ class BIM_PT_ifcclash(Panel):
    bl_parent_id = "BIM_PT_tab_clash_detection"

    def draw(self, context):
+        if not ClashData.is_loaded:
+            ClashData.load()
+
        layout = self.layout

        scene = context.scene
@@ -45,57 +50,83 @@ class BIM_PT_ifcclash(Panel):

        layout.template_list("BIM_UL_clash_sets", "", props, "clash_sets", props, "active_clash_set_index")

-        if props.active_clash_set_index < len(props.clash_sets):
-            clash_set = props.active_clash_set
+        if not props.active_clash_set:
+            return

-            row = layout.row(align=True)
-            row.prop(clash_set, "name")
-            row.operator("bim.remove_clash_set", icon="X", text="").index = props.active_clash_set_index
+        clash_set = props.active_clash_set

-            row = layout.row(align=True)
+        row = layout.row(align=True)
+        row.prop(clash_set, "name")
+        row.operator("bim.remove_clash_set", icon="X", text="").index = props.active_clash_set_index
+
+        row = layout.row()
+        row.prop(clash_set, "mode")
+
+        if clash_set.mode == "intersection":
+            row = layout.row()
            row.prop(clash_set, "tolerance")
-
-            layout.label(text="Group A:")
            row = layout.row()
-            row.operator("bim.add_clash_source").group = "a"
-
-            for index, source in enumerate(clash_set.a):
-                row = layout.row(align=True)
-                row.prop(source, "name", text="")
-                op = row.operator("bim.select_clash_source", icon="FILE_FOLDER", text="")
-                op.index = index
-                op.group = "a"
-                op = row.operator("bim.remove_clash_source", icon="X", text="")
-                op.index = index
-                op.group = "a"
-
-                row = layout.row(align=True)
-                row.prop(source, "mode", text="")
-                row.prop(source, "selector", text="")
-
-            layout.label(text="Group B:")
+            row.prop(clash_set, "check_all")
+        elif clash_set.mode == "collision":
            row = layout.row()
-            row.operator("bim.add_clash_source").group = "b"
-
-            for index, source in enumerate(clash_set.b):
-                row = layout.row(align=True)
-                row.prop(source, "name", text="")
-                op = row.operator("bim.select_clash_source", icon="FILE_FOLDER", text="")
-                op.index = index
-                op.group = "b"
-                op = row.operator("bim.remove_clash_source", icon="X", text="")
-                op.index = index
-                op.group = "b"
-
-                row = layout.row(align=True)
-                row.prop(source, "mode", text="")
-                row.prop(source, "selector", text="")
-
+            row.prop(clash_set, "allow_touching")
+        elif clash_set.mode == "clearance":
            row = layout.row()
-            row.prop(props, "should_create_clash_snapshots")
+            row.prop(clash_set, "clearance")
+            row = layout.row()
+            row.prop(clash_set, "check_all")
+
+        row = layout.row(align=True)
+        row.label(text="Group A:", icon="OUTLINER_OB_POINTCLOUD")
+        row.operator("bim.add_clash_source", icon="ADD", text="").group = "a"
+
+        for index, source in enumerate(clash_set.a):
            row = layout.row(align=True)
-            row.operator("bim.execute_ifc_clash")
-            row.operator("bim.select_ifc_clash_results")
+            row.prop(source, "name", text="")
+            row.prop(source, "mode", text="")
+            op = row.operator("bim.select_clash_source", icon="FILE_FOLDER", text="")
+            op.index = index
+            op.group = "a"
+            op = row.operator("bim.remove_clash_source", icon="X", text="")
+            op.index = index
+            op.group = "a"
+
+            if source.mode != "a":
+                blenderbim.bim.helper.draw_filter(
+                    layout, source.filter_groups, ClashData, f"clash_{props.active_clash_set_index}_a_{index}"
+                )
+
+        row = layout.row(align=True)
+        row.label(text="Group B:", icon="OUTLINER_OB_POINTCLOUD")
+        row.operator("bim.add_clash_source", icon="ADD", text="").group = "b"
+
+        for index, source in enumerate(clash_set.b):
+            row = layout.row(align=True)
+            row.prop(source, "name", text="")
+            row.prop(source, "mode", text="")
+            op = row.operator("bim.select_clash_source", icon="FILE_FOLDER", text="")
+            op.index = index
+            op.group = "b"
+            op = row.operator("bim.remove_clash_source", icon="X", text="")
+            op.index = index
+            op.group = "b"
+
+            if source.mode != "a":
+                blenderbim.bim.helper.draw_filter(
+                    layout, source.filter_groups, ClashData, f"clash_{props.active_clash_set_index}_b_{index}"
+                )
+
+        row = layout.row()
+        row.prop(props, "should_create_clash_snapshots")
+        row = layout.row()
+        row.operator("bim.execute_ifc_clash")
+
+        row = layout.row()
+        row.label(text=f"{len(clash_set.clashes)} Clashes Found", icon="PIVOT_CURSOR")
+
+        layout.template_list("BIM_UL_clashes", "", props.active_clash_set, "clashes", props, "active_clash_index")
+        row = layout.row()
+        row.operator("bim.select_clash")


 class BIM_PT_clash_manager(Panel):
@@ -111,29 +142,6 @@ class BIM_PT_clash_manager(Panel):
        pass


-class BIM_PT_dumb_clash_manager(Panel):
-    bl_idname = "BIM_PT_dumb_clash_manager"
-    bl_label = "Dumb Manager"
-    bl_options = {"DEFAULT_CLOSED"}
-    bl_space_type = "PROPERTIES"
-    bl_region_type = "WINDOW"
-    bl_context = "scene"
-    bl_parent_id = "BIM_PT_clash_manager"
-
-    def draw(self, context):
-        layout = self.layout
-        props = context.scene.BIMClashProperties
-
-        row = layout.row(align=True)
-        row.operator("bim.load_ifc_clashes", text="LOAD IFC CLASHES", icon="IMPORT")
-        row.operator("bim.save_ifc_clashes", text="SAVE CLASH RESULTS", icon="EXPORT")
-        layout.template_list("BIM_UL_clashes", "", props.active_clash_set, "clashes", props, "active_clash_index")
-        # bim.select_clash
-        row = layout.row(align=True)
-        row.operator("bim.select_clash", text="SELECT CLASH", icon="IMPORT")
-        row.prop(props, "sould_focus_on_clash", icon="RESTRICT_VIEW_OFF")
-
-
 class BIM_PT_smart_clash_manager(Panel):
    bl_idname = "BIM_PT_smart_clash_manager"
    bl_label = "Smart Clash Manager"
@@ -293,7 +293,7 @@ class RemoveClassificationReference(bpy.types.Operator, tool.Ifc.Operator):
        identification = active_reference[1]

        for obj in objects:
-            ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, obj, self.obj_type)
+            ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(obj, self.obj_type, context)
            element = tool.Ifc.get().by_id(ifc_definition_id)
            references = ifcopenshell.util.classification.get_references(element, should_inherit=False)
            for reference in references:
@@ -358,7 +358,7 @@ class AddClassificationReference(bpy.types.Operator, tool.Ifc.Operator):
                break

        for obj in objects:
-            ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, obj, self.obj_type)
+            ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(obj, self.obj_type, context)
            if not ifc_definition_id:
                continue
            ifcopenshell.api.run(
@@ -406,7 +406,7 @@ class AddClassificationReferenceFromBSDD(bpy.types.Operator, tool.Ifc.Operator):
            classification.Location = bsdd_classification.domain_namespace_uri

        for obj in objects:
-            ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, obj, self.obj_type)
+            ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(obj, self.obj_type, context)
            if not ifc_definition_id:
                continue
            element = tool.Ifc.get().by_id(ifc_definition_id)
@@ -191,11 +191,11 @@ class CoveringToolUI:
            row = cls.layout.row(align=True)
            row.label(text="", icon="FILE_3D")
            prop_with_search(row, cls.props, "relating_type_id", text="")
-            row.operator("bim.launch_type_manager", icon="LIGHTPROBE_GRID", text="")
+            row.operator("bim.launch_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="")
        else:
            row.label(text=f"No {AuthoringData.data['ifc_element_type']} Found", icon="ERROR")
            row = cls.layout.row()
-            row.operator("bim.launch_type_manager", icon="LIGHTPROBE_GRID", text="Launch Type Manager")
+            row.operator("bim.launch_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="Launch Type Manager")

    @classmethod
    def draw_basic_bim_tool_interface(cls):
@@ -24,22 +24,24 @@ classes = (
    operator.CopyDebugInformation,
    operator.CreateAllShapes,
    operator.CreateShapeFromStepId,
+    operator.DebugActiveDrawing,
    operator.InspectFromObject,
    operator.InspectFromStepId,
    operator.OverrideDisplayType,
    operator.ParseExpress,
+    operator.PipInstall,
    operator.PrintIfcFile,
    operator.PrintObjectPlacement,
+    operator.PrintUnusedElementStats,
    operator.ProfileImportIFC,
    operator.PurgeHdf5Cache,
    operator.PurgeIfcLinks,
+    operator.PurgeUnusedElementsByClass,
    operator.RewindInspector,
    operator.SelectExpressFile,
    operator.SelectHighPolygonMeshes,
    operator.SelectHighestPolygonMeshes,
    operator.ValidateIfcFile,
-    operator.PrintUnusedElementStats,
-    operator.PurgeUnusedElementsByClass,
    prop.BIMDebugProperties,
    ui.BIM_PT_debug,
 )
@@ -17,13 +17,17 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import os
+import sys
 import bpy
 import time
+import random
 import logging
 import platform
 import subprocess
 import addon_utils
 import ifcopenshell
+import ifcopenshell.api
+import ifcopenshell.util.element
 import ifcopenshell.util.placement
 import ifcopenshell.util.representation
 import blenderbim.tool as tool
@@ -623,3 +627,140 @@ class PurgeUnusedElementsByClass(bpy.types.Operator, tool.Ifc.Operator):
                print("Finished 20 batches. Manually stopping in case of infinite loop.")
        self.report({"INFO"}, f"Auto purged {total_purged} orphaned elements")
        tool.Ifc.get().write(self.filepath)
+
+
+class PipInstall(bpy.types.Operator):
+    bl_idname = "bim.pip_install"
+    bl_label = "Pip Install"
+    bl_description = "Installs a package from PyPI"
+    name: bpy.props.StringProperty()
+
+    def execute(self, context):
+        import blenderbim.bim
+
+        target = [p for p in sys.path if p.endswith("packages") and "addons" in p][0]
+        py_exec = str(sys.executable)
+
+        print("Detected executable:", py_exec)
+        print("Installing to:", target)
+
+        subprocess.call([py_exec, "-m", "ensurepip", "--user"])
+        subprocess.call([py_exec, "-m", "pip", "install", "--upgrade", "pip"])
+        # Trusted host to make things simpler due to some enterprise network restrictions
+        subprocess.call(
+            [
+                py_exec,
+                "-m",
+                "pip",
+                "install",
+                f"--target={target}",
+                "--upgrade",
+                self.name,
+                "--trusted-host",
+                "pypi.org",
+                "--trusted-host",
+                "files.pythonhosted.org",
+            ]
+        )
+        return {"FINISHED"}
+
+
+class DebugActiveDrawing(bpy.types.Operator):
+    bl_idname = "bim.debug_active_drawing"
+    bl_label = "Search Active Drawing For Failing Elements"
+    bl_description = (
+        "Will iterate over all visible drawing's objects, trying to narrow down the list of possible failing objects"
+    )
+
+    def execute(self, context: bpy.types.Context):
+        props = context.scene.DocProperties
+        drawing_item = props.drawings[props.active_drawing_index]
+        drawing = tool.Ifc.get().by_id(drawing_item.ifc_definition_id)
+
+        GREEN = "\033[92m"
+        CYAN = "\033[96m"
+        END = "\033[0m"
+        ATTEMPS = 10
+
+        # run create drawing with sync for once
+        # to make sure everything is actually in sync
+        try:
+            bpy.ops.bim.create_drawing(sync=True)
+        except:
+            pass
+        else:
+            self.report({"INFO"}, "No errors creating drawing, nothing to investigate.")
+            return {"FINISHED"}
+
+        all_elements = [e for obj in context.visible_objects if (e := tool.Ifc.get_entity(obj))]
+        all_elements = set(all_elements)
+
+        original_exclude = ifcopenshell.util.element.get_pset(drawing, "EPset_Drawing", "Exclude")
+        pset = tool.Pset.get_element_pset(drawing, "EPset_Drawing")
+
+        def drawing_fails_to_load(chunk_to_include: set) -> bool:
+            current_elements = all_elements - chunk_to_include
+            excluded_guids = ", ".join([e.GlobalId for e in current_elements if hasattr(e, "GlobalId")])
+            tool.Ifc.run("pset.edit_pset", pset=pset, properties={"Exclude": f"{original_exclude}, {excluded_guids}"})
+
+            try:
+                bpy.ops.bim.create_drawing(sync=False)
+                result = False
+            except Exception as e:
+                # print(e)
+                result = True
+
+            tool.Ifc.run("pset.edit_pset", pset=pset, properties={"Exclude": original_exclude})
+            return result
+
+        def test_elements(elements: list[ifcopenshell.entity_instance], attempts: int = ATTEMPS) -> None:
+            print(f"{CYAN}processing {len(elements)} elements{END}")
+            if not elements:
+                print(f"Empty list of elements, will stop...")
+                return
+
+            n_elements = len(elements)
+            middle = int(n_elements / 2)
+            chunk1, chunk2 = elements[:middle], elements[middle:]
+            test_chunk_1 = drawing_fails_to_load(set(chunk1))
+            test_chunk_2 = drawing_fails_to_load(set(chunk2))
+
+            if (
+                # both chunks do not fail anymore
+                (not test_chunk_1 and not test_chunk_2)
+                # or we have 1 element chunk that is still failing
+                or (test_chunk_1 and not chunk2)
+                or (test_chunk_2 and not chunk1)
+            ):
+                if attempts == 0 or n_elements in (1, 2):
+                    print(f"{GREEN}Couldn't narrow it down any further.{END}")
+                    print(f"It's some of the {n_elements} elements:")
+                    print(elements)
+
+                    print("Let's test excluding them...")
+                    for element in elements:
+                        test = drawing_fails_to_load(all_elements - {element})
+                        if test:
+                            print(f"{CYAN}Excluding element didn't fixed the drawing: {END}")
+                            print(element)
+                        else:
+                            print(f"{GREEN}Excluding element fixed the drawing: {END}")
+                            print(element)
+                else:
+                    print(f"{CYAN}Will try to reshuffle elements and try again, attempt {ATTEMPS-attempts+1}/{ATTEMPS}")
+                    attempts -= 1
+                    random.shuffle(elements)
+                    test_elements(elements, attempts)
+                return
+
+            # if chunk fails we need to investigate it further
+            if test_chunk_1:
+                test_elements(chunk1)
+
+            if test_chunk_2:
+                test_elements(chunk2)
+
+        test_elements(list(all_elements))
+
+        self.report({"INFO"}, "See system console for the results")
+        return {"FINISHED"}
@@ -51,3 +51,4 @@ class BIMDebugProperties(PropertyGroup):
        default="BOUNDS",
    )
    ifc_class_purge: StringProperty(name="Unused Elements IFC Class", default="")
+    package_name: StringProperty(name="Package Name", default="")
@@ -44,6 +44,10 @@ class BIM_PT_debug(Panel):
        row.operator("bim.parse_express", icon="IMPORT", text="")
        row.operator("bim.select_express_file", icon="FILE_FOLDER", text="")

+        row = self.layout.row(align=True)
+        row.prop(props, "package_name", text="")
+        row.operator("bim.pip_install", icon="EVENT_PAGEDOWN").name = props.package_name
+
        row = layout.row()
        row.operator("bim.reload_ifc_file", text="Incrementally Reload Changes")

@@ -71,6 +75,9 @@ class BIM_PT_debug(Panel):
        row = layout.row()
        row.operator("bim.profile_import_ifc")

+        row = layout.row()
+        row.operator("bim.debug_active_drawing")
+
        row = layout.split(factor=0.5, align=True)
        row.operator("bim.create_shape_from_step_id").should_include_curves = False
        row.operator("bim.create_shape_from_step_id", text="", icon="IPO_ELASTIC").should_include_curves = True
@@ -38,6 +38,7 @@ class DiffData:
        cls.data["total_deleted"] = cls.total_deleted()
        cls.data["total_changed"] = cls.total_changed()
        cls.data["changes"] = cls.changes()
+        cls.data["saved_searches"] = cls.saved_searches()
        cls.is_loaded = True

    @classmethod
@@ -84,3 +85,18 @@ class DiffData:
        elif element.GlobalId in diff["deleted"]:
            changes["Deleted"] = True
        return changes
+
+    @classmethod
+    def saved_searches(cls):
+        if not tool.Ifc.get():
+            return []
+        groups = tool.Ifc.get().by_type("IfcGroup")
+        results = []
+        for group in groups:
+            try:
+                data = json.loads(group.Description)
+                if isinstance(data, dict) and data.get("type", None) == "BBIM_Search" and data.get("query", None):
+                    results.append(group)
+            except:
+                pass
+        return [(str(g.id()), g.Name or "Unnamed", "") for g in sorted(results, key=lambda x: x.Name or "Unnamed")]
@@ -135,6 +135,7 @@ class ExecuteIfcDiff(bpy.types.Operator):
    bl_label = "Execute IFC Diff"
    filename_ext = ".json"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
+    filter_glob: bpy.props.StringProperty(default="*.json", options={"HIDDEN"})

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".json")
@@ -162,7 +163,7 @@ class ExecuteIfcDiff(bpy.types.Operator):
            new = ifcopenshell.open(self.props.new_file)

        relationships = [r.relationship for r in self.props.diff_relationships]
-        query = self.props.diff_filter_elements
+        query = tool.Search.export_filter_query(self.props.filter_groups) or None

        ifc_diff = ifcdiff.IfcDiff(old, new, relationships=relationships, filter_elements=query)
        ifc_diff.diff()
@@ -17,7 +17,7 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import bpy
-from blenderbim.bim.prop import StrProperty
+from blenderbim.bim.prop import StrProperty, BIMFilterGroup
 from blenderbim.bim.module.diff.data import DiffData
 from bpy.types import PropertyGroup
 from bpy.props import (
@@ -48,7 +48,7 @@ class DiffProperties(PropertyGroup):
    old_file: StringProperty(default="", name="Old IFC File")
    new_file: StringProperty(default="", name="New IFC File")
    diff_relationships: CollectionProperty(type=Relationships, name="Relationships")
-    diff_filter_elements: StringProperty(default="", name="Filter")
+    filter_groups: CollectionProperty(type=BIMFilterGroup, name="Filter Groups")
    should_load_changed_elements: BoolProperty(name="Load Changed Elements", default=True)
    active_file: EnumProperty(
        items=[
@@ -19,8 +19,8 @@
 from bpy.types import Panel
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.module.diff.data import DiffData
+import blenderbim.bim.helper
 import blenderbim.tool as tool
-import json


 class BIM_PT_diff(Panel):
@@ -93,9 +93,7 @@ class BIM_PT_diff(Panel):
            remove.collection = "diff_relationships"
            remove.index = index

-        row = layout.row(align=True)
-        row.prop(props, "diff_filter_elements")
-        row.operator("bim.ifc_selector", icon="FILTER", text="")
+        blenderbim.bim.helper.draw_filter(self.layout, props.filter_groups, DiffData, "diff")

        row = layout.row()
        row.operator("bim.execute_ifc_diff")
@@ -41,6 +41,7 @@ classes = (
    operator.CleanWireframes,
    operator.ContractSheet,
    operator.ContractTargetView,
+    operator.ConvertSVGToDXF,
    operator.CreateDrawing,
    operator.CreateSheets,
    operator.DisableAddAnnotationType,
@@ -23,6 +23,7 @@ import ifcopenshell.util.element
 import ifcopenshell.util.representation
 import blenderbim.tool as tool
 from pathlib import Path
+from typing import Any, Union


 def refresh():
@@ -234,9 +235,9 @@ class DecoratorData:
    cut_cache = {}
    layerset_cache = {}

-    # used by Ifc Annotations with ObjectType = "BATTING"
    @classmethod
    def get_batting_thickness(cls, obj):
+        """used by IfcAnnotations with ObjectType = "BATTING" """
        result = cls.data.get(obj.name, None)
        if result is not None:
            return result
@@ -248,9 +249,9 @@ class DecoratorData:
            cls.data[obj.name] = thickness
            return thickness

-    # used by Ifc Annotations with ObjectType = "SECTION"
    @classmethod
    def get_section_markers_display_data(cls, obj):
+        """used by IfcAnnotations with ObjectType = "SECTION" """
        result = cls.data.get(obj.name, None)
        if result is not None:
            return result
@@ -290,10 +291,10 @@ class DecoratorData:
        cls.data[obj.name] = display_data
        return display_data

-    # used by Ifc Annotations with ObjectType = "TEXT" / "TEXT_LEADER"
    @classmethod
-    def get_ifc_text_data(cls, obj):
-        """returns font size in mm for current ifc text object"""
+    def get_ifc_text_data(cls, obj: bpy.types.Object) -> dict[str, Any]:
+        """used by Ifc Annotations with ObjectType = "TEXT" / "TEXT_LEADER"\n
+        returns font size in mm for current ifc text object"""
        result = cls.data.get(obj.name, None)
        if result is not None:
            return result
@@ -317,7 +318,7 @@ class DecoratorData:
        font_size = FONT_SIZES[font_size_type]

        # get symbol
-        symbol = pset_data.get("Symbol", None)
+        symbol = tool.Drawing.get_annotation_symbol(element)

        # other attributes
        props_literals = props.literals
@@ -340,6 +341,11 @@ class DecoratorData:
        cls.data[obj.name] = text_data
        return text_data

+    @classmethod
+    def get_symbol(cls, obj: bpy.types.Object) -> Union[str, None]:
+        """used by IfcAnnotations with ObjectType MULTI_SYMBOL"""
+        return tool.Drawing.get_annotation_symbol(tool.Ifc.get_entity(obj))
+
    @classmethod
    def get_dimension_data(cls, obj):
        """used by Ifc Annotations with ObjectType:
@@ -412,10 +418,12 @@ class AnnotationData:
        relating_types = []
        for relating_type in tool.Ifc.get().by_type("IfcTypeProduct"):
            if tool.Drawing.is_annotation_object_type(relating_type, object_type):
-                relating_types.append({
-                    "id": relating_type.id(),
-                    "name": relating_type.Name or "Unnamed",
-                    "description": relating_type.Description or "No Description",
-                })
+                relating_types.append(
+                    {
+                        "id": relating_type.id(),
+                        "name": relating_type.Name or "Unnamed",
+                        "description": relating_type.Description or "No Description",
+                    }
+                )

        return sorted(relating_types, key=lambda x: x["name"])
@@ -37,6 +37,7 @@ from blenderbim.bim.module.drawing.shaders import add_verts_sequence, add_offset
 from blenderbim.bim.module.drawing.helper import format_distance
 from timeit import default_timer as timer
 from functools import lru_cache
+from typing import Optional, Iterator, Type, Union

 UNSPECIAL_ELEMENT_COLOR = (0.2, 0.2, 0.2, 1)  # GREY

@@ -69,7 +70,7 @@ class profile_consequential:
        cls.lines = []


-def worldspace_to_winspace(verts, context):
+def worldspace_to_winspace(verts: list[Vector], context: bpy.types.Context) -> list[Vector]:
    """Convert world space verts to window space"""
    region = context.region
    region3d = context.region_data
@@ -80,7 +81,7 @@ def worldspace_to_winspace(verts, context):
    return winspace_verts


-def winspace_to_worldspace(verts, context):
+def winspace_to_worldspace(verts: list[Vector], context: bpy.types.Context) -> list[Vector]:
    """Convert winspace verts to world space"""
    region = context.region
    region3d = context.region_data
@@ -121,17 +122,18 @@ def get_callout_head(edge_dir, edge_side, callout_size, callout_gap):
    return head


-def get_circle_head(size, segments=20):
+def get_circle_head(size: float, segments: int = 20, rotation: float = 0.0) -> list[Vector]:
+    """`rotation` value in radians"""
    angle_d = 2 * pi / segments
    head = []
    for i in range(segments):
-        angle = angle_d * i
+        angle = angle_d * i + rotation
        head.append(Vector([cos(angle), sin(angle), 0]) * size)
    return head


-def get_circle_head_asterisk(size, segments=6):
-    circle_head = get_circle_head(size, segments)
+def get_circle_head_asterisk(size: float, segments: int = 6, rotation: float = 0.0) -> Iterator[tuple[Vector, Vector]]:
+    circle_head = get_circle_head(size, segments, rotation)
    middle = segments // 2
    return zip(circle_head[:middle], circle_head[middle:])

@@ -264,7 +266,7 @@ class BaseDecorator:
        vertices = [obj.matrix_world @ v.co for v in bm.verts]
        return vertices, indices

-    def decorate(self, context, obj):
+    def decorate(self, context: bpy.types.Context, obj: bpy.types.Object):
        """perform actual drawing stuff"""
        raise NotImplementedError()

@@ -310,13 +312,28 @@ class BaseDecorator:

        self.draw_lines(context, obj, output_verts, output_edges)

-    def draw_batch(self, shader_type, content_pos, color, indices=None):
+    def draw_batch(
+        self,
+        shader_type: str,
+        content_pos: list[Vector],
+        color: tuple[float, float, float, float],
+        indices: Optional[list[tuple[int, int]]] = None,
+    ) -> None:
        shader = self.line_shader if shader_type == "LINES" else self.base_shader
        batch = batch_for_shader(shader, shader_type, {"pos": content_pos}, indices=indices)
        shader.uniform_float("color", color)
        batch.draw(shader)

-    def draw_lines(self, context, obj, vertices, indices, color=None, line_width=1.0):
+    def draw_lines(
+        self,
+        context: bpy.types.Context,
+        obj: Optional[bpy.types.Object],
+        vertices: list[Vector],
+        indices: list[tuple[int, int]],
+        color: Optional[tuple[float, float, float, float]] = None,
+        line_width: float = 1.0,
+    ) -> None:
+        # TODO: `obj` is actually never used, need to remove it
        """`verts` should be in winspace with `(0,0,0)` in the screen left bottom corner, not in the center"""
        region = context.region
        if not color:
@@ -329,7 +346,7 @@ class BaseDecorator:
        gpu.state.blend_set("ALPHA")
        self.draw_batch("LINES", vertices, color, indices)

-    def get_viewport_drawing_scale(self, context):
+    def get_viewport_drawing_scale(self, context: bpy.types.Context) -> float:
        # Horrific prototype code
        factor = self.camera_zoom_to_factor(context.space_data.region_3d.view_camera_zoom)
        camera_width_px = factor * context.region.width
@@ -485,14 +502,16 @@ class BaseDecorator:
        decimal_places = drawing_pset_data.get("DecimalPlaces", None)
        return format_distance(value, precision=precision, decimal_places=decimal_places)

-    def draw_asterisk(self, context, obj):
+    def draw_asterisk(self, context: bpy.types.Context, pos: Vector, rotation: float = 0.0, scale: float = 1.0) -> None:
+        """`pos` is a world space position\n
+        `rotation` value in radians"""
        # gather geometry data and convert to winspace
-        verts = [obj.location]
+        verts = [pos]
        viewportDrawingScale = self.get_viewport_drawing_scale(context)
        winspace_verts = worldspace_to_winspace(verts, context)

        # setup geometry parameters
-        circle_size = viewportDrawingScale * 4
+        circle_size = viewportDrawingScale * 4 * scale

        output_verts = []
        output_edges = []
@@ -502,20 +521,13 @@ class BaseDecorator:
        }

        v0 = winspace_verts[0]
-        asterisk_head = get_circle_head_asterisk(circle_size)
+        asterisk_head = get_circle_head_asterisk(circle_size, rotation=rotation)
        start_i = 0
        for segment in asterisk_head:
            start_i = add_verts_sequence(add_offsets(v0, segment), start_i, **out_kwargs)
-        self.draw_lines(context, obj, output_verts, output_edges)
+        self.draw_lines(context, None, output_verts, output_edges)

-    def draw_text(self, context, obj, text_world_position=None, reverse_lines_order=False):
-        """if `text_world_position` is not provided, the object's location will be used"""
-
-        if not text_world_position:
-            text_world_position = obj.location
-
-        region = context.region
-        region3d = context.region_data
+    def get_annotation_direction(self, context: bpy.types.Context, obj: bpy.types.Object) -> Vector:
        camera = context.scene.camera

        def get_basis_vector(matrix, i=0):
@@ -523,10 +535,57 @@ class BaseDecorator:
            return matrix.inverted()[i].to_3d().normalized()

        text_dir_world_x_axis = get_basis_vector(obj.matrix_world)
-
        camera_matrix = tool.Drawing.get_camera_matrix(camera)
-
        text_dir = (camera_matrix.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
+        return text_dir
+
+    def draw_symbol(self, context: bpy.types.Context, obj: bpy.types.Object, annotation_dir: Vector) -> None:
+        if obj.type not in ("MESH", "EMPTY"):
+            return
+
+        if obj.type == "MESH":
+            mesh: bpy.types.Mesh = obj.data
+
+            if len(mesh.vertices) == 0:
+                return
+
+            if mesh.edges:
+                MiscDecorator.decorate(self, context, obj)
+                return
+
+            symbol = DecoratorData.get_symbol(obj)
+            if not symbol:
+                return
+
+            for vert in mesh.vertices:
+                self.draw_asterisk(context, obj.matrix_world @ vert.co)
+
+            return
+
+        # EMPTY objects
+        symbol = DecoratorData.get_symbol(obj)
+        if not symbol:
+            return
+
+        rotation = -Vector((1, 0)).angle_signed(annotation_dir)
+        # NOTE: for now we assume that scale is uniform
+        self.draw_asterisk(context, obj.location, rotation, obj.scale.x)
+
+    def draw_text(
+        self,
+        context: bpy.types.Context,
+        obj: bpy.types.Object,
+        text_world_position: Optional[Vector] = None,
+        reverse_lines_order=False,
+    ) -> None:
+        """if `text_world_position` is not provided, the object's location will be used"""
+
+        if not text_world_position:
+            text_world_position = obj.location
+
+        region = context.region
+        region3d = context.region_data
+        text_dir = self.get_annotation_direction(context, obj)

        pos = location_3d_to_region_2d(region, region3d, text_world_position)
        props = obj.BIMTextProperties
@@ -539,8 +598,7 @@ class BaseDecorator:

        # draw asterisk symbol to indicate that there is some symbol that's not shown in viewport
        if symbol:
-            self.draw_asterisk(context, obj)
-            # NOTE: for now we assume that scale is uniform
+            self.draw_symbol(context, obj, text_dir)
            text_scale = obj.scale.x

        line_i = 0
@@ -548,7 +606,7 @@ class BaseDecorator:
        for literal_data in literals_data:
            box_alignment = literal_data["BoxAlignment"]

-            for line in literal_data["CurrentValue"].split("\\n"):
+            for line in literal_data["CurrentValue"].split("\n"):
                self.draw_label(
                    context,
                    line,
@@ -812,8 +870,9 @@ class AngleDecorator(BaseDecorator):
            base_edge = edge0 if tool.Cad.is_counter_clockwise_order(p0, p1, p2) else edge1
            text_offset = (Matrix.Rotation(-angle_rad / 2, 2) @ base_edge).normalized() * (radius + ANGLE_LABEL_OFFSET)
            label_position = p1 + text_offset
-
-            text = f"{int(angle)}deg"
+            drawing_pset_data = DrawingsData.data["active_drawing_pset_data"]
+            decimal_places = drawing_pset_data.get("AngleDecimalPlaces", None)
+            text = f"{round(angle, decimal_places)}°"
            label_dir = Vector((1, 0))
            self.draw_label(context, text, label_position, label_dir, box_alignment="center")

@@ -1003,7 +1062,7 @@ class StairDecorator(BaseDecorator):
 class MiscDecorator(BaseDecorator):
    objecttype = "MISC"

-    def decorate(self, context, obj):
+    def decorate(self, context: bpy.types.Context, obj: bpy.types.Object):
        if obj.data.is_editmode:
            verts, idxs = self.get_editmesh_geom(obj)
        else:
@@ -1505,6 +1564,14 @@ class TextDecorator(BaseDecorator):
        self.draw_text(context, obj)


+class SymbolDecorator(BaseDecorator):
+    objecttype = "SYMBOL"
+
+    def decorate(self, context: bpy.types.Context, obj: bpy.types.Object) -> None:
+        annotation_dir = self.get_annotation_direction(context, obj)
+        self.draw_symbol(context, obj, annotation_dir)
+
+
 class CutDecorator:
    installed = None
    cache = {}
@@ -1901,7 +1968,7 @@ class CutDecorator:


 class DecorationsHandler:
-    decorators_classes = [
+    decorators_classes: list[Type[BaseDecorator]] = [
        DimensionDecorator,
        AngleDecorator,
        GridDecorator,
@@ -1918,6 +1985,7 @@ class DecorationsHandler:
        SectionDecorator,
        ElevationDecorator,
        TextDecorator,
+        SymbolDecorator,
        BattingDecorator,
        FallDecorator,
    ]
@@ -1945,6 +2013,7 @@ class DecorationsHandler:
        self.decorators = {cls.objecttype: cls() for cls in self.decorators_classes}
        for object_type in ("SLOPE_ANGLE", "SLOPE_FRACTION", "SLOPE_PERCENT"):
            self.decorators[object_type] = self.decorators["FALL"]
+        self.decorators["MULTI_SYMBOL"] = self.decorators["SYMBOL"]

    def get_objects_and_decorators(self, collection):
        # TODO: do it in data instead of the handler for performance?
@@ -1962,7 +2031,7 @@ class DecorationsHandler:
            if not element.is_a("IfcAnnotation"):
                continue

-            object_type = element.ObjectType
+            object_type: Union[str, None] = element.ObjectType
            if object_type == "DRAWING":
                continue

@@ -188,7 +188,6 @@ def format_distance(
                feet += 1
                inches = 0

-
        if not isArea:
            add_inches = bool(inches) or not suppress_zero_inches
            tx_dist = ""
@@ -299,7 +298,9 @@ def parse_diagram_scale(camera):
    return float(numerator) / float(denominator)


-def ortho_view_frame(camera, margin=0.015):
+def ortho_view_frame(
+    camera: bpy.types.Camera, margin: float = 0.015
+) -> tuple[float, float, float, float, float, float]:
    """Calculates 2d bounding box of camera view area.

    Similar to `bpy.types.Camera.view_frame`
@@ -44,6 +44,7 @@ import blenderbim.bim.module.drawing.helper as helper
 import blenderbim.bim.export_ifc
 from blenderbim.bim.module.drawing.decoration import CutDecorator
 from blenderbim.bim.module.drawing.data import DecoratorData, DrawingsData
+from typing import NamedTuple, List, Union, Optional
 from lxml import etree
 from mathutils import Vector, Color, Matrix
 from timeit import default_timer as timer
@@ -77,6 +78,11 @@ class Operator:
        return {"FINISHED"}


+class LineworkContexts(NamedTuple):
+    body: List[List[int]]
+    annotation: List[List[int]]
+
+
 class AddAnnotationType(bpy.types.Operator, Operator):
    bl_idname = "bim.add_annotation_type"
    bl_label = "Add Annotation Type"
@@ -193,6 +199,11 @@ class CreateDrawing(bpy.types.Operator):
        + "SHIFT+CLICK to print all selected drawings"
    )
    print_all: bpy.props.BoolProperty(name="Print All", default=False, options={"SKIP_SAVE"})
+    sync: bpy.props.BoolProperty(
+        name="Sync Before Creating Drawing",
+        description="Could save some time if you're sure IFC and current Blender session are already in sync",
+        default=True,
+    )

    @classmethod
    def poll(cls, context):
@@ -214,7 +225,8 @@ class CreateDrawing(bpy.types.Operator):
        else:
            drawings_to_print = [self.props.active_drawing_id]

-        for drawing_id in drawings_to_print:
+        for drawing_i, drawing_id in enumerate(drawings_to_print):
+            self.drawing_index = drawing_i
            if self.print_all:
                bpy.ops.bim.activate_drawing(drawing=drawing_id, camera_view_point=False)

@@ -329,6 +341,13 @@ class CreateDrawing(bpy.types.Operator):
        if not ifcopenshell.util.element.get_pset(self.drawing, "EPset_Drawing", "HasUnderlay"):
            return
        svg_path = self.get_svg_path(cache_type="underlay")
+        if os.path.isfile(svg_path) and self.props.should_use_underlay_cache:
+            return svg_path
+
+        visible_object_names = {obj.name for obj in bpy.context.visible_objects}
+        for obj in bpy.context.view_layer.objects:
+            obj.hide_render = obj.name not in visible_object_names
+
        context.scene.render.filepath = svg_path[0:-4] + ".png"
        drawing_style = context.scene.DocProperties.drawing_styles[self.cprops.active_drawing_style_index]

@@ -367,20 +386,129 @@ class CreateDrawing(bpy.types.Operator):
        self.svg_writer.create_blank_svg(svg_path).draw_underlay(context.scene.render.filepath).save()
        return svg_path

-    def generate_linework(self, context):
+    def get_linework_contexts(self, ifc, target_view) -> LineworkContexts:
+        plan_body_target_contexts = []
+        plan_body_model_contexts = []
+        model_body_target_contexts = []
+        model_body_model_contexts = []
+
+        plan_annotation_target_contexts = []
+        plan_annotation_model_contexts = []
+        model_annotation_target_contexts = []
+        model_annotation_model_contexts = []
+
+        for rep_context in ifc.by_type("IfcGeometricRepresentationContext"):
+            if rep_context.is_a("IfcGeometricRepresentationSubContext"):
+                if rep_context.ContextType == "Plan":
+                    if rep_context.ContextIdentifier in ["Body", "Facetation"]:
+                        if rep_context.TargetView == target_view:
+                            plan_body_target_contexts.append(rep_context.id())
+                        elif rep_context.TargetView == "MODEL_VIEW":
+                            plan_body_model_contexts.append(rep_context.id())
+                    elif rep_context.ContextIdentifier == "Annotation":
+                        if rep_context.TargetView == target_view:
+                            plan_annotation_target_contexts.append(rep_context.id())
+                        elif rep_context.TargetView == "MODEL_VIEW":
+                            plan_annotation_model_contexts.append(rep_context.id())
+                elif rep_context.ContextType == "Model":
+                    if rep_context.ContextIdentifier in ["Body", "Facetation"]:
+                        if rep_context.TargetView == target_view:
+                            model_body_target_contexts.append(rep_context.id())
+                        elif rep_context.TargetView == "MODEL_VIEW":
+                            model_body_model_contexts.append(rep_context.id())
+                    elif rep_context.ContextIdentifier == "Annotation":
+                        if rep_context.TargetView == target_view:
+                            model_annotation_target_contexts.append(rep_context.id())
+                        elif rep_context.TargetView == "MODEL_VIEW":
+                            model_annotation_model_contexts.append(rep_context.id())
+            elif rep_context.ContextType == "Model":
+                # You should never purely assign to a "Model" context, but
+                # if you do, this is what we assume your intention is.
+                model_body_model_contexts.append(rep_context.id())
+                continue
+
+        body_contexts = (
+            [
+                plan_body_target_contexts,
+                plan_body_model_contexts,
+                model_body_target_contexts,
+                model_body_model_contexts,
+            ]
+            if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
+            else [
+                model_body_target_contexts,
+                model_body_model_contexts,
+            ]
+        )
+
+        annotation_contexts = (
+            [
+                plan_annotation_target_contexts,
+                plan_annotation_model_contexts,
+                model_annotation_target_contexts,
+                model_annotation_model_contexts,
+            ]
+            if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
+            else [
+                model_annotation_target_contexts,
+                model_annotation_model_contexts,
+            ]
+        )
+
+        return LineworkContexts(body_contexts, annotation_contexts)
+
+    def serialize_contexts_elements(
+        self,
+        ifc: ifcopenshell.file,
+        tree: ifcopenshell.geom.tree,
+        contexts: LineworkContexts,
+        context_type: str,
+        drawing_elements: set[ifcopenshell.entity_instance],
+        target_view: str,
+    ) -> None:
+        drawing_elements = drawing_elements.copy()
+        contexts = getattr(contexts, context_type)
+        for context in contexts:
+            with profile(f"Processing {context_type} context"):
+                if not context or not drawing_elements:
+                    continue
+                geom_settings = ifcopenshell.geom.settings(
+                    DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
+                )
+                if ifc.by_id(context[0]).ContextType == "Plan" and "PLAN_VIEW" in target_view:
+                    offset = ifcopenshell.ifcopenshell_wrapper.float_array_3()
+                    # A 2mm Z offset to combat Z-fighting in plan or RCPs
+                    offset[2] = 0.002 if target_view == "PLAN_VIEW" else -0.002
+                    geom_settings.offset = offset
+                geom_settings.set_context_ids(context)
+                it = ifcopenshell.geom.iterator(
+                    geom_settings, ifc, multiprocessing.cpu_count(), include=drawing_elements
+                )
+                processed = set()
+                for elem in it:
+                    processed.add(ifc.by_id(elem.id))
+                    self.serialiser.write(elem)
+                    tree.add_element(elem)
+                drawing_elements -= processed
+
+    def generate_linework(self, context: bpy.types.Context) -> Union[str, None]:
        if not ifcopenshell.util.element.get_pset(self.drawing, "EPset_Drawing", "HasLinework"):
            return
        svg_path = self.get_svg_path(cache_type="linework")
        if os.path.isfile(svg_path) and self.props.should_use_linework_cache:
            return svg_path

-        with profile("sync"):
-            # All very hackish whilst prototyping
-            exporter = blenderbim.bim.export_ifc.IfcExporter(None)
-            exporter.file = tool.Ifc.get()
-            invalidated_elements = exporter.sync_all_objects()
-            invalidated_elements += exporter.sync_edited_objects()
-            invalidated_guids = [e.GlobalId for e in invalidated_elements if hasattr(e, "GlobalId")]
+        # in case of printing multiple drawings we need to sync just once
+        if self.sync and self.drawing_index == 0:
+            with profile("sync"):
+                # All very hackish whilst prototyping
+                exporter = blenderbim.bim.export_ifc.IfcExporter(None)
+                exporter.file = tool.Ifc.get()
+                invalidated_elements = exporter.sync_all_objects(skip_unlinking=True)
+                invalidated_elements += exporter.sync_edited_objects()
+                invalidated_guids = [e.GlobalId for e in invalidated_elements if hasattr(e, "GlobalId")]
+                cache = IfcStore.get_cache()
+                [cache.remove(guid) for guid in invalidated_guids]

        # If we have already calculated it in the SVG in the past, don't recalculate
        edited_guids = set()
@@ -401,6 +529,7 @@ class CreateDrawing(bpy.types.Operator):

        for ifc_path, ifc in files.items():
            # Don't use draw.main() just whilst we're prototyping and experimenting
+            # TODO: hash paths are never used
            ifc_hash = hashlib.md5(ifc_path.encode("utf-8")).hexdigest()
            ifc_cache_path = os.path.join(context.scene.BIMProperties.data_dir, "cache", f"{ifc_hash}.h5")

@@ -408,139 +537,23 @@ class CreateDrawing(bpy.types.Operator):
            # Drawings only draw bodies and annotations (and facetation, due to a Revit bug).
            # A drawing prioritises a target view context first, followed by a model view context as a fallback.
            # Specifically for PLAN_VIEW and REFLECTED_PLAN_VIEW, any Plan context is also prioritised.
-
-            plan_body_target_contexts = []
-            plan_body_model_contexts = []
-            model_body_target_contexts = []
-            model_body_model_contexts = []
-
-            plan_annotation_target_contexts = []
-            plan_annotation_model_contexts = []
-            model_annotation_target_contexts = []
-            model_annotation_model_contexts = []
-
            target_view = ifcopenshell.util.element.get_psets(self.camera_element)["EPset_Drawing"]["TargetView"]
-
-            for rep_context in ifc.by_type("IfcGeometricRepresentationContext"):
-                if rep_context.is_a("IfcGeometricRepresentationSubContext"):
-                    if rep_context.ContextType == "Plan":
-                        if rep_context.ContextIdentifier in ["Body", "Facetation"]:
-                            if rep_context.TargetView == target_view:
-                                plan_body_target_contexts.append(rep_context.id())
-                            elif rep_context.TargetView == "MODEL_VIEW":
-                                plan_body_model_contexts.append(rep_context.id())
-                        elif rep_context.ContextIdentifier == "Annotation":
-                            if rep_context.TargetView == target_view:
-                                plan_annotation_target_contexts.append(rep_context.id())
-                            elif rep_context.TargetView == "MODEL_VIEW":
-                                plan_annotation_model_contexts.append(rep_context.id())
-                    elif rep_context.ContextType == "Model":
-                        if rep_context.ContextIdentifier in ["Body", "Facetation"]:
-                            if rep_context.TargetView == target_view:
-                                model_body_target_contexts.append(rep_context.id())
-                            elif rep_context.TargetView == "MODEL_VIEW":
-                                model_body_model_contexts.append(rep_context.id())
-                        elif rep_context.ContextIdentifier == "Annotation":
-                            if rep_context.TargetView == target_view:
-                                model_annotation_target_contexts.append(rep_context.id())
-                            elif rep_context.TargetView == "MODEL_VIEW":
-                                model_annotation_model_contexts.append(rep_context.id())
-                elif rep_context.ContextType == "Model":
-                    # You should never purely assign to a "Model" context, but
-                    # if you do, this is what we assume your intention is.
-                    model_body_model_contexts.append(rep_context.id())
-                    continue
-
-            body_contexts = (
-                [
-                    plan_body_target_contexts,
-                    plan_body_model_contexts,
-                    model_body_target_contexts,
-                    model_body_model_contexts,
-                ]
-                if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
-                else [
-                    model_body_target_contexts,
-                    model_body_model_contexts,
-                ]
-            )
-
-            annotation_contexts = (
-                [
-                    plan_annotation_target_contexts,
-                    plan_annotation_model_contexts,
-                    model_annotation_target_contexts,
-                    model_annotation_model_contexts,
-                ]
-                if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
-                else [
-                    model_annotation_target_contexts,
-                    model_annotation_model_contexts,
-                ]
-            )
-
+            contexts = self.get_linework_contexts(ifc, target_view)
            drawing_elements = tool.Drawing.get_drawing_elements(self.camera_element)

            self.setup_serialiser(ifc, target_view)
-            cache = IfcStore.get_cache()
-            [cache.remove(guid) for guid in invalidated_guids]
            tree = ifcopenshell.geom.tree()
            tree.enable_face_styles(True)

-            elements = drawing_elements.copy()
-            for body_context in body_contexts:
-                with profile("Processing body context"):
-                    if body_context and elements:
-                        geom_settings = ifcopenshell.geom.settings(
-                            DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
-                        )
-                        if ifc.by_id(body_context[0]).ContextType == "Plan" and "PLAN_VIEW" in target_view:
-                            offset = ifcopenshell.ifcopenshell_wrapper.float_array_3()
-                            # A 2mm Z offset to combat Z-fighting in plan or RCPs
-                            offset[2] = 0.002 if target_view == "PLAN_VIEW" else -0.002
-                            geom_settings.offset = offset
-                        geom_settings.set_context_ids(body_context)
-                        it = ifcopenshell.geom.iterator(
-                            geom_settings, ifc, multiprocessing.cpu_count(), include=elements
-                        )
-                        it.set_cache(cache)
-                        processed = set()
-                        for elem in self.yield_from_iterator(it):
-                            processed.add(ifc.by_id(elem.id))
-                            self.serialiser.write(elem)
-                            tree.add_element(elem)
-                        elements -= processed
-
-            elements = drawing_elements.copy()
-            for annotation_context in annotation_contexts:
-                with profile("Processing annotation context"):
-                    if annotation_context and elements:
-                        geom_settings = ifcopenshell.geom.settings(
-                            DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
-                        )
-                        if ifc.by_id(annotation_context[0]).ContextType == "Plan" and "PLAN_VIEW" in target_view:
-                            offset = ifcopenshell.ifcopenshell_wrapper.float_array_3()
-                            # A 2mm Z offset to combat Z-fighting in plan or RCPs
-                            offset[2] = 0.002 if target_view == "PLAN_VIEW" else -0.002
-                            geom_settings.offset = offset
-                        geom_settings.set_context_ids(annotation_context)
-                        it = ifcopenshell.geom.iterator(
-                            geom_settings, ifc, multiprocessing.cpu_count(), include=elements
-                        )
-                        it.set_cache(cache)
-                        processed = set()
-                        for elem in self.yield_from_iterator(it):
-                            processed.add(ifc.by_id(elem.id))
-                            self.serialiser.write(elem)
-                            tree.add_element(elem)
-                        elements -= processed
+            self.serialize_contexts_elements(ifc, tree, contexts, "body", drawing_elements, target_view)
+            self.serialize_contexts_elements(ifc, tree, contexts, "annotation", drawing_elements, target_view)

            if self.camera_element not in drawing_elements:
                with profile("Camera element"):
                    # The camera must always be included, regardless of any include/exclude filters.
                    geom_settings = ifcopenshell.geom.settings(DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True)
                    it = ifcopenshell.geom.iterator(geom_settings, ifc, include=[self.camera_element])
-                    for elem in self.yield_from_iterator(it):
+                    for elem in it:
                        self.serialiser.write(elem)

        with profile("Finalizing"):
@@ -588,8 +601,7 @@ class CreateDrawing(bpy.types.Operator):
                if global_id not in elements_with_faces:
                    continue
                for path in projection.findall("./{http://www.w3.org/2000/svg}path"):
-                    # Rounding is necessary to ensure coincident points are coincident
-                    start, end = [[round(float(o), 1) for o in co[1:].split(",")] for co in path.attrib["d"].split()]
+                    start, end = [[float(o) for o in co[1:].split(",")] for co in path.attrib["d"].split()]
                    if start == end:
                        continue
                    # Extension by 0.5mm is necessary to ensure lines overlap with other diagonal lines
@@ -884,13 +896,6 @@ class CreateDrawing(bpy.types.Operator):
        # the style of the face when running tree.select_ray()
        # tree.enable_face_styles(True)

-    def yield_from_iterator(self, it):
-        if it.initialize():
-            while True:
-                yield it.get()
-                if not it.next():
-                    break
-
    def get_svg_classes(self, element):
        classes = [element.is_a()]
        material = ifcopenshell.util.element.get_material(element, should_skip_usage=True)
@@ -970,7 +975,7 @@ class CreateDrawing(bpy.types.Operator):
            for path in el.findall("{http://www.w3.org/2000/svg}path"):
                for subpath in path.attrib["d"].split("M")[1:]:
                    subpath = "M" + subpath.strip()
-                    coords = [[round(float(o), 1) for o in co[1:].split(",")] for co in subpath.split()]
+                    coords = [[float(o) for o in co[1:].split(",")] for co in subpath.split()]
                    if coords[0] != coords[-1]:
                        has_open_paths = True
                    line_strings.append(shapely.LineString(coords))
@@ -1034,7 +1039,7 @@ class CreateDrawing(bpy.types.Operator):
                for path in el.findall("{http://www.w3.org/2000/svg}path"):
                    for subpath in path.attrib["d"].split("M")[1:]:
                        subpath_co = "M" + subpath.strip(" Z")
-                        coords = [[round(float(o), 1) for o in co[1:].split(",")] for co in subpath_co.split()]
+                        coords = [[float(o) for o in co[1:].split(",")] for co in subpath_co.split()]
                        if subpath.strip().lower().endswith("z"):
                            coords.append(coords[0])
                        if len(coords) > 2 and coords[0] == coords[-1]:
@@ -1132,14 +1137,14 @@ class CreateDrawing(bpy.types.Operator):
                    continue
                return space

-    def get_material_name(self, element):
+    def get_material_name(self, element: ifcopenshell.entity_instance) -> str:
        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_svg_path(self, cache_type=None):
+    def get_svg_path(self, cache_type: Optional[str] = None) -> str:
        drawing_path = tool.Drawing.get_document_uri(self.camera_document)
        drawings_dir = os.path.dirname(drawing_path)

@@ -1362,7 +1367,7 @@ class SelectAllDrawings(bpy.types.Operator):
    bl_label = "Select All Drawings"
    view: bpy.props.StringProperty()
    bl_description = "Select all drawings in the drawing list.\n\n" + "SHIFT+CLICK to deselect all drawings"
-    select_all: bpy.props.BoolProperty(name="Open All", default=False, options={"SKIP_SAVE"})
+    select_all: bpy.props.BoolProperty(name="Open All", default=True, options={"SKIP_SAVE"})

    def invoke(self, context, event):
        # deselect all drawings on shift+click
@@ -1468,10 +1473,6 @@ class ActivateModel(bpy.types.Operator):


 class ActivateDrawing(bpy.types.Operator):
-    """
-    Activates the selected drawing view
-    """
-
    bl_idname = "bim.activate_drawing"
    bl_label = "Activate Drawing"
    bl_options = {"REGISTER", "UNDO"}
@@ -1617,8 +1618,14 @@ class ReloadDrawingStyles(bpy.types.Operator):

        json_path = Path(tool.Ifc.resolve_uri(rel_path))
        if not json_path.exists():
-            self.report({"ERROR"}, "Shading styles file not found: {}".format(json_path))
-            return {"CANCELLED"}
+            ootb_resource = Path(context.scene.BIMProperties.data_dir) / "assets" / "shading_styles.json"
+            print(
+                f"WARNING. Couldn't find shading_styles for the drawing by the path: {json_path}. "
+                f"Default BBIM resource will be copied from {ootb_resource}"
+            )
+            if ootb_resource.exists():
+                os.makedirs(json_path.parent, exist_ok=True)
+                shutil.copy(ootb_resource, json_path)

        with open(json_path, "r") as fi:
            shading_styles_json = json.load(fi)
@@ -2299,8 +2306,16 @@ class AssignSelectedObjectAsProduct(bpy.types.Operator):

    def execute(self, context):
        objs = context.selected_objects[:]
-        objs.remove(context.active_object)
-        other_selected_object = next(obj for obj in context.selected_objects if obj != context.active_object)
+        obj1 = objs[0]
+        element1 = tool.Ifc.get_entity(obj1)
+        obj2 = objs[1]
+        element2 = tool.Ifc.get_entity(obj2)
+        if element1.is_a("IfcAnnotation"):
+            other_selected_object = obj2
+            bpy.context.view_layer.objects.active = obj1
+        elif element2.is_a("IfcAnnotation"):
+            other_selected_object = obj1
+            bpy.context.view_layer.objects.active = obj2
        context.active_object.BIMAssignedProductProperties.relating_product = other_selected_object
        bpy.ops.bim.edit_assigned_product()
        return {"FINISHED"}
@@ -2698,3 +2713,50 @@ class AddReferenceImage(bpy.types.Operator, Operator):
        )
        tool.Style.reload_material_from_ifc(material)
        tool.Geometry.record_object_materials(obj)
+
+
+class ConvertSVGToDXF(bpy.types.Operator):
+    bl_idname = "bim.convert_svg_to_dxf"
+    bl_label = "Convert SVG to DXF"
+    bl_options = {"REGISTER", "UNDO"}
+    view: bpy.props.StringProperty()
+    bl_description = "Convert current drawing's .svg to .dxf.\n\nSHIFT+CLICK to convert all selected drawings"
+    convert_all: bpy.props.BoolProperty(name="Convert All", default=False, options={"SKIP_SAVE"})
+
+    def invoke(self, context, event):
+        # convert all drawings on shift+click
+        # make sure to use SKIP_SAVE on property, otherwise it might get stuck
+        if event.type == "LEFTMOUSE" and event.shift:
+            self.open_all = True
+        return self.execute(context)
+
+    def execute(self, context):
+        if self.convert_all:
+            drawings = [
+                tool.Ifc.get().by_id(d.ifc_definition_id) for d in context.scene.DocProperties.drawings if d.is_selected
+            ]
+        else:
+            drawings = [tool.Ifc.get().by_id(context.scene.DocProperties.drawings.get(self.view).ifc_definition_id)]
+
+        drawing_uris: list[Path] = []
+        drawings_not_found: list[str] = []
+
+        for drawing in drawings:
+            drawing_uri = tool.Drawing.get_document_uri(tool.Drawing.get_drawing_document(drawing))
+            if drawing_uri is None or not os.path.exists(drawing_uri):
+                drawings_not_found.append(drawing.Name)
+            else:
+                drawing_uris.append(Path(drawing_uri))
+
+        if drawings_not_found:
+            msg = "Some drawings .svg files were not found, need to print them first: \n{}.".format(
+                "\n".join(drawings_not_found)
+            )
+            self.report({"ERROR"}, msg)
+            return {"CANCELLED"}
+
+        for drawing_uri in drawing_uris:
+            tool.Drawing.convert_svg_to_dxf(drawing_uri, drawing_uri.with_suffix(".dxf"))
+
+        self.report({"INFO"}, f"{len(drawing_uris)} drawings were converted to .dxf.")
+        return {"FINISHED"}
@@ -194,7 +194,7 @@ def update_document_name(self, context):
 def update_has_underlay(self, context):
    update_layer(self, context, "HasUnderlay", self.has_underlay)
    # making sure that camera is active
-    if self.has_underlay and (context.active_object and context.active_object.data == self.id_data):
+    if self.has_underlay and (context.scene.camera and context.scene.camera.data == self.id_data):
        bpy.ops.bim.reload_drawing_styles()
        bpy.ops.bim.activate_drawing_style()

@@ -208,10 +208,12 @@ def update_has_annotation(self, context):


 def update_layer(self, context, name, value):
-    element = tool.Ifc.get_entity(context.active_object)
+    if not context.scene.camera or context.scene.camera.data != self.id_data:
+        return
+    element = tool.Ifc.get_entity(context.scene.camera)
    if not element:
        return
-    pset = ifcopenshell.util.element.get_psets(element).get("EPset_Drawing")
+    pset = ifcopenshell.util.element.get_pset(element, "EPset_Drawing")
    if pset:
        pset = tool.Ifc.get().by_id(pset["id"])
    else:
@@ -29,9 +29,11 @@ import svgwrite
 import ifcopenshell
 import ifcopenshell.util.element
 import ifcopenshell.util.representation
+import ifcopenshell.util.selector
 import blenderbim.tool as tool
 import blenderbim.bim.module.drawing.helper as helper
 import blenderbim.bim.module.drawing.annotation as annotation
+from blenderbim.bim.module.drawing.data import DrawingsData

 from blenderbim.bim.module.drawing.data import DecoratorData
 from blenderbim.bim.ifc import IfcStore
@@ -39,6 +41,7 @@ from blenderbim.bim.ifc import IfcStore
 from math import pi, ceil, atan, degrees, acos
 from mathutils import geometry, Vector
 from bpy_extras import view3d_utils
+from typing import Optional


 class External(svgwrite.container.Group):
@@ -322,7 +325,7 @@ class SvgWriter:
                )
            )

-    def draw_misc_annotation(self, obj):
+    def draw_misc_annotation(self, obj: bpy.types.Object) -> None:
        # We have to decide whether this should come from Blender or from IFC.
        # For the moment, for convenience of experimenting with ideas, it comes
        # from Blender. In the future, it should probably come from IFC.
@@ -356,14 +359,14 @@ class SvgWriter:
            d = "M{}".format(d[1:])
            path = self.svg.add(self.svg.path(d=d, class_=" ".join(classes)))

-    def get_attribute_classes(self, obj):
+    def get_attribute_classes(self, obj: bpy.types.Object) -> list[str]:
        element = tool.Ifc.get_entity(obj)
        global_id = "GlobalId-{}".format(element.GlobalId)
        predefined_type = "PredefinedType-" + tool.Drawing.canonicalise_class_name(
            str(ifcopenshell.util.element.get_predefined_type(element))
        )
        classes = [global_id, element.is_a(), predefined_type]
-        custom_classes = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Classes")
+        custom_classes: str = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Classes")
        if custom_classes:
            classes.extend(custom_classes.split())
        for key in self.metadata:
@@ -787,7 +790,7 @@ class SvgWriter:
        attrib["filter"] = "url(#fill-background)"
        return element

-    def draw_text_annotation(self, text_obj, position):
+    def draw_text_annotation(self, text_obj: bpy.types.Object, position: Vector) -> None:
        x_offset = self.raw_width / 2
        y_offset = self.raw_height / 2
        element = tool.Ifc.get_entity(text_obj)
@@ -799,17 +802,7 @@ class SvgWriter:
        text_position_svg = text_position * self.svg_scale
        text_position_svg_str = ", ".join(map(str, text_position_svg))

-        def get_basis_vector(matrix, i=0):
-            """returns basis vector for i in world space, unaffected by object scale"""
-            return matrix.inverted()[i].to_3d().normalized()
-
-        text_dir_world_x_axis = get_basis_vector(text_obj.matrix_world)
-
-        # RCP cameras may be scaled, so reset scales.
-        camera_matrix = tool.Drawing.get_camera_matrix(self.camera)
-        text_dir = (camera_matrix.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
-        angle = math.degrees(-text_dir.angle_signed(Vector((1, 0))))
-
+        angle = self.get_empty_object_angle(text_obj)
        classes = self.get_attribute_classes(text_obj)
        classes_str = " ".join(classes)
        fill_bg = "fill-bg" in classes
@@ -817,8 +810,7 @@ class SvgWriter:
        symbol = tool.Drawing.get_annotation_symbol(element)
        template_text_fields = []
        if symbol:
-            # NOTE: for now we assume that scale is uniform
-            symbol_transform = f"translate({text_position_svg_str}) rotate({angle}) scale({text_obj.scale.x})"
+            symbol_transform = self.get_symbol_transform(text_position_svg_str, angle, text_obj)

            symbol_svg = self.find_xml_symbol_by_id(symbol)
            if symbol_svg:
@@ -847,7 +839,7 @@ class SvgWriter:
                    return None

            if not symbol_svg or not template_text_fields:
-                self.svg.add(self.svg.use(f"#{symbol}", transform=symbol_transform))
+                self.draw_symbol(symbol, symbol_transform)

        line_number = 0
        for text_literal in text_literals:
@@ -865,17 +857,14 @@ class SvgWriter:
                self.svg.add(tag)
            line_number += len(tag.elements)

-    def draw_empty_annotation(self, obj, classes):
+    def draw_empty_annotation(self, obj: bpy.types.Object, classes: list[str]) -> None:
        x_offset = self.raw_width / 2
        y_offset = self.raw_height / 2

        point = self.project_point_onto_camera(obj.matrix_world.translation)

        element = tool.Ifc.get_entity(obj)
-        svg_id = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Symbol")
-        if not svg_id:
-            # EPset_AnnotationSurveyArea is not standard! See bSI-4.3 proposal #660.
-            svg_id = ifcopenshell.util.element.get_pset(element, "EPset_AnnotationSurveyArea", "PointType")
+        svg_id = tool.Drawing.get_annotation_symbol(element)
        if not svg_id:
            svg_id = str(ifcopenshell.util.element.get_predefined_type(element))
        if not svg_id:
@@ -883,9 +872,37 @@ class SvgWriter:

        point = Vector(((x_offset + point.x), (y_offset - point.y)))
        symbol_position_svg = point * self.svg_scale
-        self.svg.add(self.svg.use(f"#{svg_id}", insert=symbol_position_svg))
+        svg_position_str = ", ".join(map(str, symbol_position_svg))

-    def draw_point_annotation(self, obj, classes):
+        angle = self.get_empty_object_angle(obj)
+        symbol_transform = self.get_symbol_transform(svg_position_str, angle, obj)
+        self.draw_symbol(svg_id, symbol_transform)
+
+    def get_empty_object_angle(self, obj: bpy.types.Object) -> float:
+        def get_basis_vector(matrix: bpy.types.Object, i: int = 0) -> Vector:
+            """returns basis vector for i in world space, unaffected by object scale"""
+            return matrix.inverted()[i].to_3d().normalized()
+
+        text_dir_world_x_axis = get_basis_vector(obj.matrix_world)
+
+        # RCP cameras may be scaled, so reset scales.
+        camera_matrix = tool.Drawing.get_camera_matrix(self.camera)
+        text_dir = (camera_matrix.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
+        return math.degrees(-text_dir.angle_signed(Vector((1, 0))))
+
+    def get_symbol_transform(
+        self, svg_position_str: str, angle: float = 0.0, obj: Optional[bpy.types.Object] = None
+    ) -> str:
+        """`obj` will be used to identify symbol scale,
+        ignore it if object scale doesn't match the symbol scale"""
+        # NOTE: for now we assume that scale is uniform
+        scale = 1.0 if not obj else obj.scale.x
+        return f"translate({svg_position_str}) rotate({angle}) scale({scale})"
+
+    def draw_symbol(self, symbol_id: str, symbol_transform: str) -> None:
+        self.svg.add(self.svg.use(f"#{symbol_id}", transform=symbol_transform))
+
+    def draw_point_annotation(self, obj: bpy.types.Object, classes: list[str]) -> None:
        x_offset = self.raw_width / 2
        y_offset = self.raw_height / 2

@@ -893,10 +910,7 @@ class SvgWriter:
        projected_points = [self.project_point_onto_camera(matrix_world @ v.co) for v in obj.data.vertices]

        element = tool.Ifc.get_entity(obj)
-        svg_id = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Symbol")
-        if not svg_id:
-            # EPset_AnnotationSurveyArea is not standard! See bSI-4.3 proposal #660.
-            svg_id = ifcopenshell.util.element.get_pset(element, "EPset_AnnotationSurveyArea", "PointType")
+        svg_id = tool.Drawing.get_annotation_symbol(element)
        if not svg_id:
            svg_id = str(ifcopenshell.util.element.get_predefined_type(element))
        if not svg_id:
@@ -905,7 +919,10 @@ class SvgWriter:
        for symbol_position in projected_points:
            symbol_position = Vector(((x_offset + symbol_position.x), (y_offset - symbol_position.y)))
            symbol_position_svg = symbol_position * self.svg_scale
-            self.svg.add(self.svg.use(f"#{svg_id}", insert=symbol_position_svg))
+            svg_position_str = ", ".join(map(str, symbol_position_svg))
+
+            symbol_transform = self.get_symbol_transform(svg_position_str)
+            self.draw_symbol(svg_id, symbol_transform)

    def draw_break_annotations(self, obj):
        x_offset = self.raw_width / 2
@@ -1066,7 +1083,9 @@ class SvgWriter:
        # calculating text parameters and adding text
        text_position = arc_mid_point + arc_mid_dir * 5
        text_style = SvgWriter.get_box_alignment_parameters("center")
-        angle_text = f"{int(angle)}deg"
+        drawing_pset_data = DrawingsData.data["active_drawing_pset_data"]
+        decimal_places = drawing_pset_data.get("AngleDecimalPlaces", None)
+        angle_text = f"{round(angle, decimal_places)}°"
        self.svg.add(self.svg.text(angle_text, insert=text_position, class_="ANGLE", **text_style))

        # Draw SVG arc, see for details: http://xahlee.info/js/svg_circle_arc.html
@@ -1402,7 +1421,7 @@ class SvgWriter:

        return text_tags

-    def project_point_onto_camera(self, point):
+    def project_point_onto_camera(self, point: Vector) -> Vector:
        # TODO is this needlessly complex?
        return self.camera.matrix_world.inverted() @ geometry.intersect_line_plane(
            point.xyz,
@@ -268,6 +268,11 @@ class BIM_PT_drawings(Panel):
                col = row.column()
                col.alignment = "RIGHT"

+                convert_to_dxf = row.row(align=True)
+                op = convert_to_dxf.operator("bim.convert_svg_to_dxf", text="", icon="IMAGE_DATA")
+                op.view = active_drawing.name
+                convert_to_dxf.enabled = active_drawing.ifc_definition_id > 0
+
                op = row.operator("bim.select_all_drawings", icon="SELECT_SUBTRACT", text="")

                open_drawing_button = row.row(align=True)
@@ -250,7 +250,7 @@ class AnnotationToolUI:
        row = cls.layout.row(align=True)
        row.label(text="", icon="FILE_3D")
        prop_with_search(row, cls.props, "relating_type_id", text="")
-        row.operator("bim.launch_annotation_type_manager", icon="LIGHTPROBE_GRID", text="")
+        row.operator("bim.launch_annotation_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="")

        add_layout_hotkey_operator(cls.layout, "Add", "S_A", "Create a new annotation")

@@ -49,7 +49,17 @@ classes = (
    operator.SwitchRepresentation,
    operator.UpdateParametricRepresentation,
    operator.UpdateRepresentation,
+    operator.RemoveRepresentationItem,
+    operator.EnableEditingRepresentationItemStyle,
+    operator.EditRepresentationItemStyle,
+    operator.DisableEditingRepresentationItemStyle,
+    operator.UnassignRepresentationItemStyle,
+    operator.EnableEditingRepresentationItemShapeAspect,
+    operator.EditRepresentationItemShapeAspect,
+    operator.DisableEditingRepresentationItemShapeAspect,
+    operator.RemoveRepresentationItemFromShapeAspect,
    prop.RepresentationItem,
+    prop.ShapeAspect,
    prop.BIMObjectGeometryProperties,
    prop.BIMGeometryProperties,
    ui.BIM_PT_placement,
@@ -93,7 +103,9 @@ def register():
        addon_keymaps.append((km, kmi))
        kmi = km.keymap_items.new("bim.override_object_duplicate_move_linked_macro", "D", "PRESS", alt=True)
        addon_keymaps.append((km, kmi))
-        kmi = km.keymap_items.new("bim.object_duplicate_move_linked_aggregate_macro", "D", "PRESS", ctrl=True, shift=True)
+        kmi = km.keymap_items.new(
+            "bim.object_duplicate_move_linked_aggregate_macro", "D", "PRESS", ctrl=True, shift=True
+        )
        addon_keymaps.append((km, kmi))
        kmi = km.keymap_items.new("bim.override_paste_buffer", "V", "PRESS", ctrl=True)
        addon_keymaps.append((km, kmi))
@@ -38,6 +38,7 @@ class RepresentationsData:
    def load(cls):
        cls.data = {"representations": cls.representations()}
        cls.data["contexts"] = cls.contexts()
+        cls.data["shape_aspects"] = cls.shape_aspects()
        cls.is_loaded = True

    @classmethod
@@ -92,6 +93,26 @@ class RepresentationsData:
            )
        return results

+    @classmethod
+    def shape_aspects(cls):
+        obj = bpy.context.active_object
+        if not obj.data:
+            return []
+        element = tool.Ifc.get_entity(obj)
+        active_representation_id = obj.data.BIMMeshProperties.ifc_definition_id
+        base_representation = tool.Ifc.get().by_id(active_representation_id)
+
+        # shape aspects matching context of the active representation
+        matching_shape_aspects = []
+        for shape_aspect in ifcopenshell.util.element.get_shape_aspects(element):
+            matching_representation = tool.Geometry.get_shape_aspect_representation(shape_aspect, base_representation)
+            if matching_representation:
+                matching_shape_aspects.append(shape_aspect)
+
+        # blender enum items
+        new_shape_aspect = [("NEW", "Create A New Shape Aspect", "")]
+        return new_shape_aspect + [(str(s.id()), s.Name or "Unnamed", "") for s in matching_shape_aspects]
+

 class RepresentationItemsData:
    data = {}
@@ -21,12 +21,14 @@ import bmesh
 import mathutils
 import ifcopenshell
 import ifcopenshell.util.unit
+import blenderbim.tool as tool
 from math import pi, pow
 from mathutils import Vector, Matrix, geometry
+from typing import Union


 class Helper:
-    def __init__(self, file):
+    def __init__(self, file: ifcopenshell.file):
        self.file = file
        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(self.file)

@@ -34,7 +36,7 @@ class Helper:
    # edge that shares a single vertex only with that face to find the extrusion
    # edge. A face with the normal facing down is prioritised. A limited
    # dissolve ensure that faces are quads and not tris.
-    def auto_detect_rectangle_profile_extruded_area_solid(self, mesh):
+    def auto_detect_rectangle_profile_extruded_area_solid(self, mesh: bpy.types.Mesh) -> dict:
        bm = bmesh.new()
        bm.from_mesh(mesh)
        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
@@ -115,7 +117,9 @@ class Helper:

        return {"profile": profile, "extrusion": extrusion}

-    def auto_detect_arbitrary_profile_with_voids(self, obj, mesh):
+    def auto_detect_arbitrary_profile_with_voids(
+        self, obj: bpy.types.Object, mesh: bpy.types.Mesh
+    ) -> Union[tuple, dict]:
        groups = {"IFCARCINDEX": [], "IFCCIRCLE": []}
        for i, group in enumerate(obj.vertex_groups):
            if "IFCARCINDEX" in group.name:
@@ -138,28 +142,31 @@ class Helper:
            total_groups = 0
            is_circle = False
            for group_type, group_indices in groups.items():
-                for group_index in group_indices:
-                    if group_index in vert[deform_layer]:
-                        if group_type == "IFCCIRCLE":
-                            is_circle = True
-                        group_verts[group_type].setdefault(group_index, 0)
-                        group_verts[group_type][group_index] += 1
-                        total_groups += 0
+                if not group_indices:
+                    continue
+                is_special, group_index = tool.Blender.bmesh_check_vertex_in_groups(vert, deform_layer, group_indices)
+                if not is_special:
+                    continue
+                if group_type == "IFCCIRCLE":
+                    is_circle = True
+                group_verts[group_type].setdefault(group_index, 0)
+                group_verts[group_type][group_index] += 1
+                total_groups += 0
            if total_groups > 1:  # A vert can only belong to one group
                return (False, "AMBIGUOUS_SPECIAL_VERTEX")
            elif is_circle:
-                pass # Circles are allowed to be unclosed
+                pass  # Circles are allowed to be unclosed
            elif total_groups == 0 and len(vert.link_edges) != 2:  # Unclosed loop or forked loop
                return (False, "UNCLOSED_LOOP")

        for group_type, group_counts in group_verts.items():
            if group_type == "IFCARCINDEX":
                for group_count in group_counts.values():
-                    if group_count != 3: # Each arc needs 3 verts
+                    if group_count != 3:  # Each arc needs 3 verts
                        return (False, "3POINT_ARC")
            elif group_type == "IFCCIRCLE":
                for group_count in group_counts.values():
-                    if group_count != 2: # Each circle needs 2 verts
+                    if group_count != 2:  # Each circle needs 2 verts
                        return (False, "CIRCLE")

        loop_edges = set(bm.edges)
@@ -269,7 +276,7 @@ class Helper:
        inner_loops.remove(outer_loop)

        # Copy vectors to prevent random data mangling after bmesh is freed.
-        points = [Vector(list(v.co)) for v in bm.verts]
+        points = [v.co.copy() for v in bm.verts]

        bm.to_mesh(mesh)
        mesh.update()
@@ -21,10 +21,12 @@ import bmesh
 import logging
 import numpy as np
 import json
+import re
 import ifcopenshell
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
 import ifcopenshell.util.representation
+import ifcopenshell.util.placement
 import ifcopenshell.api
 import blenderbim.core.geometry as core
 import blenderbim.core.aggregate
@@ -36,6 +38,7 @@ import blenderbim.bim.handler
 from mathutils import Vector, Matrix
 from time import time
 from blenderbim.bim.ifc import IfcStore
+from ifcopenshell.util.shape_builder import ShapeBuilder


 class Operator:
@@ -321,8 +324,8 @@ class UpdateRepresentation(bpy.types.Operator, Operator):
                # We are explicitly casting to a tessellation, so remove all parametric materials.
                element_type = ifcopenshell.util.element.get_type(product)
                if element_type:  # Some invalid IFCs use material sets without a type.
-                    ifcopenshell.api.run("material.unassign_material", tool.Ifc.get(), product=element_type)
-                ifcopenshell.api.run("material.unassign_material", tool.Ifc.get(), product=product)
+                    ifcopenshell.api.run("material.unassign_material", tool.Ifc.get(), products=[element_type])
+                ifcopenshell.api.run("material.unassign_material", tool.Ifc.get(), products=[product])
            else:
                # These objects are parametrically based on an axis and should not be modified as a mesh
                return
@@ -767,11 +770,13 @@ class OverrideDuplicateMove(bpy.types.Operator):
            element = tool.Ifc.get_entity(obj)
            if element:
                if element.is_a("IfcAnnotation") and element.ObjectType == "DRAWING":
-                    self.report({'INFO'}, "Did not duplicate. Duplicate drawings through the Drawings and Documents UI.")
+                    self.report(
+                        {"INFO"}, "Did not duplicate. Duplicate drawings through the Drawings and Documents UI."
+                    )
                    obj.select_set(False)
                    continue  # For now, don't copy drawings until we stabilise a bit more. It's tricky.
                elif element.is_a("IfcProject"):
-                    self.report({'INFO'}, "Did not duplicate. IFC can only have one project.")
+                    self.report({"INFO"}, "Did not duplicate. IFC can only have one project.")
                    obj.select_set(False)
                    continue  # Only one IfcProject is allowed.

@@ -838,6 +843,7 @@ class OverrideDuplicateMove(bpy.types.Operator):

        # Recreate decompositions
        tool.Root.recreate_decompositions(decomposition_relationships, old_to_new)
+        OverrideDuplicateMove.handle_linked_aggregates(old_to_new)
        blenderbim.bim.handler.refresh_ui_data()
        return old_to_new

@@ -890,6 +896,26 @@ class OverrideDuplicateMove(bpy.types.Operator):
                if entity in old_to_new.keys():
                    core.remove_connection(tool.Geometry, connection=connection)

+    @staticmethod
+    def handle_linked_aggregates(old_to_new):
+        for old, new in old_to_new.items():
+            pset = ifcopenshell.util.element.get_pset(new[0], "BBIM_Linked_Aggregate")
+            if pset:
+                old_aggregate = ifcopenshell.util.element.get_aggregate(old)
+                new_aggregate = ifcopenshell.util.element.get_aggregate(new[0])
+                if old_aggregate == new_aggregate:
+                    parts = ifcopenshell.util.element.get_parts(new_aggregate)
+                    if parts:
+                        index = DuplicateMoveLinkedAggregate.get_max_index(parts)
+                        index += 1
+                        pset = tool.Ifc.get().by_id(pset["id"])
+                        ifcopenshell.api.run(
+                            "pset.edit_pset",
+                            tool.Ifc.get(),
+                            pset=pset,
+                            properties={"Index": index},
+                        )
+

 class OverrideDuplicateMoveLinkedMacro(bpy.types.Macro):
    bl_idname = "bim.override_object_duplicate_move_linked_macro"
@@ -948,17 +974,36 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):
            obj.select_set(True)
            parts = ifcopenshell.util.element.get_parts(element)
            if parts:
-                index = 0
+                index = DuplicateMoveLinkedAggregate.get_max_index(parts)
+                add_linked_aggregate_pset(element, index)
+                index += 1
                for part in parts:
                    if part.is_a("IfcElementAssembly"):
                        select_objects_and_add_data(part)
-
-                    add_linked_aggregate_pset(part, index)
-                    index += 1
+                    else:
+                        add_linked_aggregate_pset(part, index)
+                        index += 1

                    obj = tool.Ifc.get_object(part)
                    obj.select_set(True)

+        def add_linked_aggregate_pset(part, index):
+            pset = ifcopenshell.util.element.get_pset(part, self.pset_name)
+
+            if not pset:
+                pset = ifcopenshell.api.run("pset.add_pset", tool.Ifc.get(), product=part, name=self.pset_name)
+
+                ifcopenshell.api.run(
+                    "pset.edit_pset",
+                    tool.Ifc.get(),
+                    pset=pset,
+                    properties={"Index": index},
+                )
+            else:
+                pass
+
+            return index
+
        def add_linked_aggregate_group(element):
            linked_aggregate_group = None
            product_groups_name = [
@@ -970,24 +1015,32 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):
                return

            linked_aggregate_group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), Name=self.group_name)
-            ifcopenshell.api.run("group.assign_group", tool.Ifc.get(), products=[element], group=linked_aggregate_group)
-
-        def add_linked_aggregate_pset(part, index):
-            pset = ifcopenshell.util.element.get_pset(part, self.pset_name)
-
-            if not pset:
-                pset = ifcopenshell.api.run("pset.add_pset", tool.Ifc.get(), product=part, name=self.pset_name)
-            else:
-                pset = tool.Ifc.get().by_id(pset["id"])
-
            ifcopenshell.api.run(
-                "pset.edit_pset",
-                tool.Ifc.get(),
-                pset=pset,
-                properties={"Index": index},
+                "group.assign_group", tool.Ifc.get(), products=[element], group=linked_aggregate_group
            )

-            return index
+        def custom_incremental_naming_for_element_assembly(old_to_new):
+            for new in old_to_new.values():
+                if new[0].is_a("IfcElementAssembly"):
+                    group_elements = [
+                        r.RelatedObjects
+                        for r in getattr(new[0], "HasAssignments", []) or []
+                        if r.is_a("IfcRelAssignsToGroup")
+                        if "BBIM_Linked_Aggregate" in r.RelatingGroup.Name
+                    ][0]
+
+                    number = len(group_elements) - 1
+                    number = f"{number:02d}"
+                    new_obj = tool.Ifc.get_object(new[0])
+                    pattern1 = r"_\d"
+                    if re.findall(pattern1, new_obj.name):
+                        split_name = new_obj.name.split("_")
+                        new_obj.name = split_name[0] + "_" + number
+                        continue
+                    pattern2 = r"\.\d{3}"
+                    if re.findall(pattern2, new_obj.name):
+                        split_name = new_obj.name.split(".")
+                        new_obj.name = split_name[0] + "_" + number

        if len(context.selected_objects) != 1:
            return {"FINISHED"}
@@ -1009,6 +1062,8 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):

        old_to_new = OverrideDuplicateMove.execute_ifc_duplicate_operator(self, context, linked=True)

+        custom_incremental_naming_for_element_assembly(old_to_new)
+
        # Recreate aggregate relationship
        for old in old_to_new.keys():
            if old.is_a("IfcElementAssembly"):
@@ -1018,6 +1073,16 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):

        return old_to_new

+    @staticmethod
+    def get_max_index(parts):
+        psets = [ifcopenshell.util.element.get_pset(p, "BBIM_Linked_Aggregate") for p in parts]
+        index = [i["Index"] for i in psets if i]
+        if len(index) > 0:
+            index = max(index)
+            return index
+        else:
+            return 0
+

 class RefreshLinkedAggregate(bpy.types.Operator):
    bl_idname = "bim.refresh_linked_aggregate"
@@ -1042,6 +1107,7 @@ class RefreshLinkedAggregate(bpy.types.Operator):
        self.pset_name = "BBIM_Linked_Aggregate"
        refresh_start_time = time()
        old_to_new = {}
+        original_names = {}

        def delete_objects(element):
            parts = ifcopenshell.util.element.get_parts(element)
@@ -1054,6 +1120,61 @@ class RefreshLinkedAggregate(bpy.types.Operator):

            tool.Geometry.delete_ifc_object(tool.Ifc.get_object(element))

+        def get_original_names(element):
+            group = [
+                r.RelatingGroup
+                for r in getattr(element, "HasAssignments", []) or []
+                if r.is_a("IfcRelAssignsToGroup")
+                if self.group_name in r.RelatingGroup.Name
+            ][0].id()
+            original_names[group] = {}
+
+            pset = ifcopenshell.util.element.get_pset(element, self.pset_name)
+            index = pset["Index"]
+            original_names[group][index] = tool.Ifc.get_object(element).name
+
+            parts = ifcopenshell.util.element.get_parts(element)
+            if parts:
+                for part in parts:
+                    if part.is_a("IfcElementAssembly"):
+                        original_names | get_original_names(part)
+                    else:
+                        try:
+                            pset = ifcopenshell.util.element.get_pset(part, self.pset_name)
+                        except:
+                            continue
+                        index = pset["Index"]
+                        original_names[group][index] = tool.Ifc.get_object(part).name
+
+            return original_names
+
+        def set_original_name(obj, original_names):
+            element = tool.Ifc.get_entity(obj)
+            aggregate = ifcopenshell.util.element.get_aggregate(element)
+            if ifcopenshell.util.element.get_parts(
+                element
+            ):  # if element has parts it means it is the base of and aggregate or sub-aggregate
+                aggregate = element
+
+            group = [
+                r.RelatingGroup
+                for r in getattr(aggregate, "HasAssignments", []) or []
+                if r.is_a("IfcRelAssignsToGroup")
+                if self.group_name in r.RelatingGroup.Name
+            ]
+            if not group:
+                return
+
+            group = group[0].id()
+
+            pset = ifcopenshell.util.element.get_pset(element, self.pset_name)
+            index = pset["Index"]
+
+            try:
+                obj.name = original_names[group][index]
+            except:
+                return
+
        def get_element_assembly(element):
            if element.is_a("IfcElementAssembly"):
                return element
@@ -1139,6 +1260,8 @@ class RefreshLinkedAggregate(bpy.types.Operator):
                object_duplicate = tool.Ifc.get_object(element)
                duplicate_matrix = object_duplicate.matrix_world.decompose()

+                original_names = get_original_names(element)
+
                delete_objects(element)

                for obj in context.selected_objects:
@@ -1146,7 +1269,9 @@ class RefreshLinkedAggregate(bpy.types.Operator):

                tool.Ifc.get_object(base_instance).select_set(True)

-                old_to_new = DuplicateMoveLinkedAggregate.execute_ifc_duplicate_linked_aggregate_operator(self, context)
+                old_to_new = DuplicateMoveLinkedAggregate.execute_ifc_duplicate_linked_aggregate_operator(
+                    self, context
+                )
                for old, new in old_to_new.items():
                    new_obj = tool.Ifc.get_object(new[0])
                    new_base_matrix = Matrix.LocRotScale(*duplicate_matrix)
@@ -1154,6 +1279,7 @@ class RefreshLinkedAggregate(bpy.types.Operator):
                    new_obj_matrix = new_base_matrix @ matrix_diff
                    new_obj.matrix_world = new_obj_matrix

+                for old, new in old_to_new.items():
                    if element_aggregate and new[0].is_a("IfcElementAssembly"):
                        new_aggregate = ifcopenshell.util.element.get_aggregate(new[0])

@@ -1166,6 +1292,10 @@ class RefreshLinkedAggregate(bpy.types.Operator):
                                related_obj=tool.Ifc.get_object(new[0]),
                            )

+                for old, new in old_to_new.items():
+                    new_obj = tool.Ifc.get_object(new[0])
+                    set_original_name(new_obj, original_names)
+
        blenderbim.bim.handler.refresh_ui_data()

        operator_time = time() - refresh_start_time
@@ -1198,18 +1328,23 @@ class OverrideJoin(bpy.types.Operator, Operator):
        return self.join_blender_obj()

    def join_ifc_obj(self):
-        representation = tool.Ifc.get().by_id(self.target.data.BIMMeshProperties.ifc_definition_id)
+        ifc_file = tool.Ifc.get()
+        builder = ShapeBuilder(ifc_file)
+        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        representation = ifc_file.by_id(self.target.data.BIMMeshProperties.ifc_definition_id)
        if representation.RepresentationType in ("Tessellation", "Brep"):
            for obj in bpy.context.selected_objects:
                if obj == self.target:
                    continue
                element = tool.Ifc.get_entity(obj)
                if element:
-                    ifcopenshell.api.run("root.remove_product", tool.Ifc.get(), product=element)
+                    ifcopenshell.api.run("root.remove_product", ifc_file, product=element)
            bpy.ops.object.join()
            bpy.ops.bim.update_representation(obj=self.target.name, ifc_representation_class="")
        elif representation.RepresentationType == "SweptSolid":
            target_placement = np.array(self.target.matrix_world)
+            target_placement[:, 3][:3] /= si_conversion
+
            items = list(representation.Items)
            for obj in bpy.context.selected_objects:
                if obj == self.target:
@@ -1222,31 +1357,28 @@ class OverrideJoin(bpy.types.Operator, Operator):
                    continue

                # Only objects of the same representation type can be joined
-                obj_rep = tool.Ifc.get().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
+                obj_rep = ifc_file.by_id(obj.data.BIMMeshProperties.ifc_definition_id)
                if obj_rep.RepresentationType != "SweptSolid":
                    obj.select_set(False)
                    continue

                placement = np.array(obj.matrix_world)
+                placement[:, 3][:3] /= si_conversion

                for item in obj_rep.Items:
-                    copied_item = ifcopenshell.util.element.copy_deep(tool.Ifc.get(), item)
+                    copied_item = ifcopenshell.util.element.copy_deep(ifc_file, item)
                    for style in item.StyledByItem:
-                        copied_style = ifcopenshell.util.element.copy(tool.Ifc.get(), style)
+                        copied_style = ifcopenshell.util.element.copy(ifc_file, style)
                        copied_style.Item = copied_item
                    if copied_item.Position:
                        position = ifcopenshell.util.placement.get_axis2placement(copied_item.Position)
                    else:
-                        position = np.eye(4)
+                        position = np.eye(4, dtype=float)
                    position = placement @ position
                    position = np.linalg.inv(target_placement) @ position
-                    copied_item.Position = tool.Ifc.get().createIfcAxis2Placement3D(
-                        tool.Ifc.get().createIfcCartesianPoint([float(n) for n in position[:, 3][:3]]),
-                        tool.Ifc.get().createIfcDirection([float(n) for n in position[:, 2][:3]]),
-                        tool.Ifc.get().createIfcDirection([float(n) for n in position[:, 0][:3]]),
-                    )
+                    copied_item.Position = builder.create_axis2_placement_3d_from_matrix(position)
                    items.append(copied_item)
-                ifcopenshell.api.run("root.remove_product", tool.Ifc.get(), product=element)
+                ifcopenshell.api.run("root.remove_product", ifc_file, product=element)
            representation.Items = items
            bpy.ops.object.join()
            core.switch_representation(
@@ -1311,7 +1443,9 @@ class OverrideModeSetEdit(bpy.types.Operator):
        for obj in selected_objs:
            if not obj:
                continue
-            if not obj.data:
+            obj_supports_edit_mode, message = tool.Blender.object_supports_edit_mode(obj)
+            if not obj_supports_edit_mode:
+                self.report({"INFO"}, message)
                obj.select_set(False)
                continue
            element = tool.Ifc.get_entity(obj)
@@ -1590,6 +1724,16 @@ class EnableEditingRepresentationItems(bpy.types.Operator, Operator):
                                    new.surface_style = style.Name or "Unnamed"
                        elif inverse.is_a("IfcPresentationLayerAssignment"):
                            new.layer = inverse.Name or "Unnamed"
+                        elif inverse.is_a("IfcShapeRepresentation"):
+                            if inverse.OfShapeAspect:
+                                shape_aspect = inverse.OfShapeAspect[0]
+                                new.shape_aspect = shape_aspect.Name
+                                new.shape_aspect_id = shape_aspect.id()
+
+            # sort created items
+            sorted_items = sorted(props.items[:], key=lambda i: (not i.shape_aspect, i.shape_aspect))
+            for i, item in enumerate(sorted_items[:-1]):  # last item is sorted automatically
+                props.items.move(props.items[:].index(item), i)


 class DisableEditingRepresentationItems(bpy.types.Operator, Operator):
@@ -1600,3 +1744,270 @@ class DisableEditingRepresentationItems(bpy.types.Operator, Operator):
    def _execute(self, context):
        obj = context.active_object
        obj.BIMGeometryProperties.is_editing = False
+
+
+class RemoveRepresentationItem(bpy.types.Operator, Operator):
+    bl_idname = "bim.remove_representation_item"
+    bl_label = "Remove Representation Item"
+    bl_options = {"REGISTER", "UNDO"}
+
+    representation_item_id: bpy.props.IntProperty()
+
+    @classmethod
+    def poll(cls, context):
+        if context.active_object is None or len(context.active_object.BIMGeometryProperties.items) <= 1:
+            cls.poll_message_set(
+                "Active object need to have more than 1 representation items to keep representation valid"
+            )
+            return False
+        return True
+
+    def _execute(self, context):
+        obj = context.active_object
+        props = obj.BIMGeometryProperties
+        ifc_file = tool.Ifc.get()
+
+        representation_item = ifc_file.by_id(self.representation_item_id)
+        tool.Geometry.remove_representation_item(representation_item)
+        tool.Geometry.reload_representation(obj)
+
+        # reload items ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
+
+
+def poll_editing_representaiton_item_style(cls, context):
+    if not (obj := getattr(context, "active_object", None)):
+        return False
+    props = obj.BIMGeometryProperties
+    if not props.is_editing:
+        return False
+    if not 0 <= props.active_item_index < len(props.items):
+        return False
+    item = props.items[props.active_item_index]
+    shape_aspect = item.shape_aspect
+    if shape_aspect == "":
+        return True
+
+    from blenderbim.bim.module.material.data import ObjectMaterialData
+
+    if not ObjectMaterialData.is_loaded:
+        ObjectMaterialData.load()
+    constituents = ObjectMaterialData.data["active_material_constituents"]
+    if any(c for c in constituents if c == shape_aspect):
+        cls.poll_message_set(
+            "Style comes from item's shape aspect related to the material constituent "
+            "with the same name and cannot be edited on representation item directly - "
+            "you can change it from the material constituent"
+        )
+        return False
+    return True
+
+
+class EnableEditingRepresentationItemStyle(bpy.types.Operator, Operator):
+    bl_idname = "bim.enable_editing_representation_item_style"
+    bl_label = "Enable Editing Representation Item Style"
+    bl_options = {"REGISTER", "UNDO"}
+
+    @classmethod
+    def poll(cls, context):
+        return poll_editing_representaiton_item_style(cls, context)
+
+    def _execute(self, context):
+        props = context.active_object.BIMGeometryProperties
+        props.is_editing_item_style = True
+        ifc_file = tool.Ifc.get()
+
+        # set dropdown to currently active style
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = ifc_file.by_id(representation_item_id)
+        style = tool.Style.get_representation_item_style(representation_item)
+        if style:
+            props.representation_item_style = str(style.id())
+
+
+class EditRepresentationItemStyle(bpy.types.Operator, Operator):
+    bl_idname = "bim.edit_representation_item_style"
+    bl_label = "Edit Representation Item Style"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        obj = context.active_object
+        props = obj.BIMGeometryProperties
+        props.is_editing_item_style = False
+        ifc_file = tool.Ifc.get()
+
+        surface_style = ifc_file.by_id(int(props.representation_item_style))
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = ifc_file.by_id(representation_item_id)
+
+        tool.Style.assign_style_to_representation_item(representation_item, surface_style)
+        tool.Geometry.reload_representation(obj)
+        # reload items ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
+
+
+class DisableEditingRepresentationItemStyle(bpy.types.Operator, Operator):
+    bl_idname = "bim.disable_editing_representation_item_style"
+    bl_label = "Disable Editing Representation Item Style"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        props = context.active_object.BIMGeometryProperties
+        props.is_editing_item_style = False
+
+
+class UnassignRepresentationItemStyle(bpy.types.Operator, Operator):
+    bl_idname = "bim.unassign_representation_item_style"
+    bl_label = "Unassign Representation Item Style"
+    bl_options = {"REGISTER", "UNDO"}
+
+    @classmethod
+    def poll(cls, context):
+        return poll_editing_representaiton_item_style(cls, context)
+
+    def _execute(self, context):
+        obj = context.active_object
+        props = obj.BIMGeometryProperties
+        props.is_editing_item_style = False
+
+        # get active representation item
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = tool.Ifc.get_entity_by_id(representation_item_id)
+        if not representation_item:
+            self.report({"ERROR"}, f"Couldn't find representation item by id {representation_item_id}.")
+            return {"CANCELLED"}
+
+        tool.Style.assign_style_to_representation_item(representation_item, None)
+        tool.Geometry.reload_representation(obj)
+        # reload items ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
+
+
+class EnableEditingRepresentationItemShapeAspect(bpy.types.Operator, Operator):
+    bl_idname = "bim.enable_editing_representation_item_shape_aspect"
+    bl_label = "Enable Editing Representation Item Shape Aspect"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        props = context.active_object.BIMGeometryProperties
+        props.is_editing_item_shape_aspect = True
+
+        # set dropdown to currently active shape aspect
+        shape_aspect_id = props.items[props.active_item_index].shape_aspect_id
+        if shape_aspect_id != 0:
+            props.representation_item_shape_aspect = str(shape_aspect_id)
+
+
+class EditRepresentationItemShapeAspect(bpy.types.Operator, Operator):
+    bl_idname = "bim.edit_representation_item_shape_aspect"
+    bl_label = "Edit Representation Item Shape Aspect"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        obj = context.active_object
+        element = tool.Ifc.get_entity(obj)
+        props = obj.BIMGeometryProperties
+        props.is_editing_item_shape_aspect = False
+        ifc_file = tool.Ifc.get()
+
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = ifc_file.by_id(representation_item_id)
+
+        if props.representation_item_shape_aspect == "NEW":
+            active_representation = tool.Geometry.get_active_representation(obj)
+            # find IfcProductRepresentationSelect based on current representation
+            if hasattr(element, "Representation"):  # IfcProduct
+                product_shape = element.Representation
+            else:  # IfcTypeProduct
+                for representation_map in element.RepresentationMaps:
+                    if representation_map.MappedRepresentation == active_representation:
+                        product_shape = representation_map
+            previous_shape_aspect_id = props.items[props.active_item_index].shape_aspect_id
+            # will be None if item didn't had a shape aspect
+            previous_shape_aspect = tool.Ifc.get_entity_by_id(previous_shape_aspect_id)
+            shape_aspect = tool.Geometry.create_shape_aspect(
+                product_shape, active_representation, [representation_item], previous_shape_aspect
+            )
+        else:
+            shape_aspect = ifc_file.by_id(int(props.representation_item_shape_aspect))
+            tool.Geometry.add_representation_item_to_shape_aspect([representation_item], shape_aspect)
+
+        # set attributes from UI
+        shape_aspect_attrs = props.shape_aspect_attrs
+        shape_aspect.Name = shape_aspect_attrs.name
+        shape_aspect.Description = shape_aspect_attrs.description
+
+        shape_aspect_representation = tool.Geometry.get_shape_aspect_representation_for_item(
+            shape_aspect, representation_item
+        )
+        styles = tool.Geometry.get_shape_aspect_styles(element, shape_aspect, representation_item)
+        tool.Ifc.run(
+            "style.assign_representation_styles",
+            shape_representation=shape_aspect_representation,
+            styles=styles,
+        )
+        tool.Geometry.get_shape_aspect_styles(element, shape_aspect, representation_item)
+        tool.Geometry.reload_representation(obj)
+
+        # reload items ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
+
+
+class DisableEditingRepresentationItemShapeAspect(bpy.types.Operator, Operator):
+    bl_idname = "bim.disable_editing_representation_item_shape_aspect"
+    bl_label = "Disable Editing Representation Item Shape Aspect"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        props = context.active_object.BIMGeometryProperties
+        props.is_editing_item_shape_aspect = False
+
+
+class RemoveRepresentationItemFromShapeAspect(bpy.types.Operator, Operator):
+    bl_idname = "bim.remove_representation_item_from_shape_aspect"
+    bl_label = "Remove Representation Item From Shape Aspect"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        obj = context.active_object
+        element = tool.Ifc.get_entity(obj)
+        props = obj.BIMGeometryProperties
+        ifc_file = tool.Ifc.get()
+
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = ifc_file.by_id(representation_item_id)
+        shape_aspect = ifc_file.by_id(props.items[props.active_item_index].shape_aspect_id)
+
+        # unassign items before removing items as removing items
+        # might remove shape aspect
+        if representation_item.StyledByItem:
+            styles = tool.Geometry.get_shape_aspect_styles(element, shape_aspect, representation_item)
+            self.remove_styles_from_item(representation_item, styles)
+            tool.Geometry.reload_representation(obj)
+
+        tool.Geometry.remove_representation_items_from_shape_aspect([representation_item], shape_aspect)
+
+        # reload items ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
+
+    def remove_styles_from_item(self, representation_item, styles):
+        ifc_file = tool.Ifc.get()
+        styled_item = representation_item.StyledByItem[0]
+        new_styles = [s for s in styled_item.Styles if s not in styles]
+        styled_item.Styles = new_styles
+
+        for style_ in new_styles:
+            if style_.is_a("IfcPresentationStyleAssignment"):
+                new_assignment_styles = [s for s in styled_item.Styles if s not in styles]
+                if not new_assignment_styles:
+                    ifc_file.remove(style_)
+                else:
+                    style_.Styles = new_assignment_styles
+
+        if not styled_item.Styles:
+            ifc_file.remove(styled_item)
@@ -17,6 +17,7 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import bpy
+import blenderbim.tool as tool
 from blenderbim.bim.prop import StrProperty, Attribute
 from blenderbim.bim.module.geometry.data import RepresentationsData
 from bpy.types import PropertyGroup
@@ -47,11 +48,63 @@ def update_mode(self, context):
        bpy.ops.bim.override_mode_set_edit("INVOKE_DEFAULT")


+def get_styles(self, context):
+    # postponed import to avoid circular import
+    from blenderbim.bim.module.material.data import MaterialsData
+
+    if not MaterialsData.is_loaded:
+        MaterialsData.load()
+    return MaterialsData.data["styles"]
+
+
+def get_shape_aspects(self, context):
+    if not RepresentationsData.is_loaded:
+        RepresentationsData.load()
+    return RepresentationsData.data["shape_aspects"]
+
+
+def get_material_constituents(self, context, edit_text):
+    from blenderbim.bim.module.material.data import ObjectMaterialData
+
+    if not ObjectMaterialData.is_loaded:
+        ObjectMaterialData.load()
+    return ObjectMaterialData.data["active_material_constituents"]
+
+
+def update_shape_aspect(self, context):
+    shape_aspect_id = self.representation_item_shape_aspect
+    attrs = self.shape_aspect_attrs
+
+    if shape_aspect_id == "NEW":  # new shape aspect
+        attrs.name = tool.Blender.get_blender_prop_default_value(attrs, "name")
+        attrs.description = tool.Blender.get_blender_prop_default_value(attrs, "description")
+    else:
+        shape_aspect = tool.Ifc.get().by_id(int(shape_aspect_id))
+        attrs.name = shape_aspect.Name or ""
+        attrs.description = shape_aspect.Description or ""
+
+
 class RepresentationItem(PropertyGroup):
    name: StringProperty(name="Name")
    surface_style: StringProperty(name="Surface Style")
    layer: StringProperty(name="Layer")
    ifc_definition_id: IntProperty(name="IFC Definition ID")
+    shape_aspect: StringProperty(name="Shape Aspect")
+    shape_aspect_id: IntProperty(name="Shape Aspect IFC ID")
+
+
+class ShapeAspect(PropertyGroup):
+    name: StringProperty(
+        name="Name",
+        description=(
+            "Note that IfcMaterialConstituent is applied based on shape aspects using the same name as material constituent.\n"
+            "In dropdown suggestions you can see names of existing material constituents."
+        ),
+        **({} if bpy.app.version < (3, 3, 0) else {"search": get_material_constituents}),
+    )
+    description: StringProperty(
+        name="Description",
+    )


 class BIMObjectGeometryProperties(PropertyGroup):
@@ -59,6 +112,13 @@ class BIMObjectGeometryProperties(PropertyGroup):
    is_editing: BoolProperty(name="Is Editing", default=False)
    items: CollectionProperty(name="Representation Items", type=RepresentationItem)
    active_item_index: IntProperty(name="Active Representation Item Index")
+    is_editing_item_style: BoolProperty(name="Is Editing Item's Style", default=False)
+    representation_item_style: EnumProperty(items=get_styles, name="Representation Item Style")
+    is_editing_item_shape_aspect: BoolProperty(name="Is Editing Item's Shape Aspect", default=False)
+    representation_item_shape_aspect: EnumProperty(
+        items=get_shape_aspects, name="Representation Item Shape Aspect", update=update_shape_aspect
+    )
+    shape_aspect_attrs: PointerProperty(type=ShapeAspect)


 class BIMGeometryProperties(PropertyGroup):
@@ -29,6 +29,7 @@ from blenderbim.bim.module.geometry.data import (
    PlacementData,
    DerivedCoordinatesData,
 )
+from blenderbim.bim.module.layer.data import LayersData


 def mode_menu(self, context):
@@ -133,6 +134,7 @@ class BIM_PT_representations(Panel):

        if not RepresentationsData.data["representations"]:
            layout.label(text="No Representations Found")
+            return

        for representation in RepresentationsData.data["representations"]:
            row = self.layout.row(align=True)
@@ -150,6 +152,18 @@ class BIM_PT_representations(Panel):
            op.ifc_definition_id = representation["id"]
            op.disable_opening_subtractions = False
            row.operator("bim.remove_representation", icon="X", text="").representation_id = representation["id"]
+            if representation["is_active"]:
+                active_representation = representation
+
+        layout.separator()
+        if not LayersData.is_loaded:
+            LayersData.load()
+        if LayersData.data["active_layers"]:
+            layout.label(text="Representation Presentation Layers:")
+            for layer_name in LayersData.data["active_layers"].values():
+                layout.label(text=layer_name, icon="STICKY_UVS_LOC")
+        else:
+            layout.label(text="Representation Has No Presentation Layers", icon="STICKY_UVS_LOC")


 class BIM_PT_representation_items(Panel):
@@ -187,20 +201,47 @@ class BIM_PT_representation_items(Panel):
        self.layout.template_list("BIM_UL_representation_items", "", props, "items", props, "active_item_index")

        item_is_active = props.active_item_index < len(props.items)
-        if item_is_active:
-            surface_style = props.items[props.active_item_index].surface_style
-            presentation_layer = props.items[props.active_item_index].layer
+        if not item_is_active:
+            return
+
+        active_item = props.items[props.active_item_index]
+        surface_style = active_item.surface_style
+        shape_aspect = active_item.shape_aspect
+
+        row = self.layout.row(align=True)
+        if props.is_editing_item_style:
+            # NOTE: we currently support 1 item having just 1 style
+            # when IfcStyledItem can actually have multiple styles
+            prop_with_search(row, props, "representation_item_style", icon="SHADING_RENDERED", text="")
+            row.operator("bim.edit_representation_item_style", icon="CHECKMARK", text="")
+            row.operator("bim.disable_editing_representation_item_style", icon="CANCEL", text="")
        else:
-            surface_style, presentation_layer = None, None
+            if surface_style:
+                row.label(text=surface_style, icon="SHADING_RENDERED")
+            else:
+                row.label(text="No Surface Style", icon="MESH_UVSPHERE")
+            row.operator("bim.enable_editing_representation_item_style", icon="GREASEPENCIL", text="")
+            if surface_style:
+                row.operator("bim.unassign_representation_item_style", icon="X", text="")

        row = self.layout.row()
-        if surface_style:
-            row.label(text=surface_style, icon="SHADING_RENDERED")
-        else:
-            row.label(text="No Surface Style", icon="MESH_UVSPHERE")
+        row.label(text=active_item.layer or "No Presentation Layer", icon="STICKY_UVS_LOC")

-        row = self.layout.row()
-        row.label(text=presentation_layer or "No Presentation Layer", icon="STICKY_UVS_LOC")
+        row = self.layout.row(align=True)
+        if props.is_editing_item_shape_aspect:
+            row.prop(props, "representation_item_shape_aspect", icon="SHAPEKEY_DATA", text="")
+            row.operator("bim.edit_representation_item_shape_aspect", icon="CHECKMARK", text="")
+            row.operator("bim.disable_editing_representation_item_shape_aspect", icon="CANCEL", text="")
+
+            shape_aspect_attrs = props.shape_aspect_attrs
+            self.layout.label(text="Shape Aspect Attributes:")
+            self.layout.prop(shape_aspect_attrs, "name")
+            self.layout.prop(shape_aspect_attrs, "description")
+        else:
+            row.label(text=shape_aspect or "No Shape Aspect", icon="SHAPEKEY_DATA")
+            row.operator("bim.enable_editing_representation_item_shape_aspect", icon="GREASEPENCIL", text="")
+            if shape_aspect:
+                row.operator("bim.remove_representation_item_from_shape_aspect", icon="X", text="")


 class BIM_PT_connections(Panel):
@@ -466,6 +507,11 @@ class BIM_UL_representation_items(UIList):
        if item:
            icon = "MATERIAL" if item.surface_style else "MESH_UVSPHERE"
            row = layout.row(align=True)
-            row.label(text=item.name, icon=icon)
+            item_name = item.name
+            if item.shape_aspect:
+                item_name = f"{item.shape_aspect} {item_name}"
+            row.label(text=item_name, icon=icon)
            if item.layer:
                row.label(text="", icon="STICKY_UVS_LOC")
+            op = row.operator("bim.remove_representation_item", icon="X", text="")
+            op.representation_item_id = item.ifc_definition_id
@@ -212,7 +212,7 @@ class UnassignGroup(bpy.types.Operator, tool.Ifc.Operator):
                "group.unassign_group",
                self.file,
                **{
-                    "product": self.file.by_id(product.BIMObjectProperties.ifc_definition_id),
+                    "products": [self.file.by_id(product.BIMObjectProperties.ifc_definition_id)],
                    "group": self.file.by_id(self.group),
                }
            )
@@ -40,14 +40,15 @@ class LayersData:

    @classmethod
    def active_layers(cls):
+        if not bpy.context.active_object:
+            return []
        data = bpy.context.active_object.data
        if not data:
            return []
        if not isinstance(data, bpy.types.Mesh) or not data.BIMMeshProperties.ifc_definition_id:
            return []
-        results = []
+        results = dict()
        shape = tool.Ifc.get().by_id(data.BIMMeshProperties.ifc_definition_id)
-        for inverse in tool.Ifc.get().get_inverse(shape):
-            if inverse.is_a("IfcPresentationLayerAssignment"):
-                results.append(inverse.id())
+        for inverse in shape.LayerAssignments:
+            results[inverse.id()] = inverse.Name or "Unnamed"
        return results
@@ -137,6 +137,7 @@ class RemovePresentationLayer(bpy.types.Operator):
 class AssignPresentationLayer(bpy.types.Operator):
    bl_idname = "bim.assign_presentation_layer"
    bl_label = "Assign Presentation Layer"
+    bl_description = "Assign presentation layer to the active representation of the active object"
    bl_options = {"REGISTER", "UNDO"}
    item: bpy.props.StringProperty()
    layer: bpy.props.IntProperty()
@@ -150,7 +151,10 @@ class AssignPresentationLayer(bpy.types.Operator):
        ifcopenshell.api.run(
            "layer.assign_layer",
            self.file,
-            **{"item": self.file.by_id(item.BIMMeshProperties.ifc_definition_id), "layer": self.file.by_id(self.layer)}
+            **{
+                "items": [self.file.by_id(item.BIMMeshProperties.ifc_definition_id)],
+                "layer": self.file.by_id(self.layer),
+            }
        )
        return {"FINISHED"}

@@ -158,6 +162,7 @@ class AssignPresentationLayer(bpy.types.Operator):
 class UnassignPresentationLayer(bpy.types.Operator):
    bl_idname = "bim.unassign_presentation_layer"
    bl_label = "Unassign Presentation Layer"
+    bl_description = "Unassign presentation layer from the active representation of the active object"
    bl_options = {"REGISTER", "UNDO"}
    item: bpy.props.StringProperty()
    layer: bpy.props.IntProperty()
@@ -171,7 +176,10 @@ class UnassignPresentationLayer(bpy.types.Operator):
        ifcopenshell.api.run(
            "layer.unassign_layer",
            self.file,
-            **{"item": self.file.by_id(item.BIMMeshProperties.ifc_definition_id), "layer": self.file.by_id(self.layer)}
+            **{
+                "items": [self.file.by_id(item.BIMMeshProperties.ifc_definition_id)],
+                "layer": self.file.by_id(self.layer),
+            }
        )
        return {"FINISHED"}

@@ -84,6 +84,7 @@ class BIM_UL_layers(UIList):
                    op = row.operator("bim.assign_presentation_layer", text="", icon="KEYFRAME", emboss=False)
                    op.layer = item.ifc_definition_id

+            # TODO: replace placeholder UI for hiding presentation layers
            row.operator("bim.disable_editing_layer", text="", icon="HIDE_OFF", emboss=False)
            row.operator("bim.disable_editing_layer", text="", icon="FREEZE", emboss=False)

@@ -19,6 +19,7 @@
 import os
 import bpy
 import ifcopenshell
+import ifcopenshell.util.doc
 import ifcopenshell.util.schema
 import blenderbim.tool as tool

@@ -109,29 +110,41 @@ class MaterialsData:
    def active_styles(cls):
        props = bpy.context.scene.BIMMaterialProperties
        results = []
-        if props.materials and props.active_material_index < len(props.materials):
-            material = props.materials[props.active_material_index].ifc_definition_id
-            if not material:
-                return results
-            material = tool.Ifc.get().by_id(material)
-            for definition in material.HasRepresentation:
-                for representation in definition.Representations:
-                    if not representation.is_a("IfcStyledRepresentation"):
+        if not props.materials or props.active_material_index >= len(props.materials):
+            return results
+
+        material = props.materials[props.active_material_index].ifc_definition_id
+        if not material:
+            return results
+
+        material = tool.Ifc.get_entity_by_id(material)
+
+        # NOTE: it's possible that data will be refreshed during material removal
+        # (when it will try to fetch active material type and will reach for material_types)
+        # and props.materials[i].ifc_definition_id will contain already removed id
+        if not material or not material.is_a("IfcMaterial"):
+            return results
+
+        for definition in material.HasRepresentation:
+            for representation in definition.Representations:
+                if not representation.is_a("IfcStyledRepresentation"):
+                    continue
+                context = representation.ContextOfItems
+                for item in representation.Items:
+                    if not item.is_a("IfcStyledItem"):
                        continue
-                    context = representation.ContextOfItems
-                    for item in representation.Items:
-                        if not item.is_a("IfcStyledItem"):
-                            continue
-                        for style in item.Styles:
-                            if style.is_a("IfcSurfaceStyle"):
-                                results.append({
+                    for style in item.Styles:
+                        if style.is_a("IfcSurfaceStyle"):
+                            results.append(
+                                {
                                    "context_type": context.ContextType,
                                    "context_identifier": getattr(context, "ContextIdentifier", ""),
                                    "target_view": getattr(context, "TargetView", ""),
                                    "name": style.Name or "Unnamed",
                                    "id": style.id(),
                                    "context_id": context.id(),
-                                })
+                                }
+                            )
        return results


@@ -152,6 +165,7 @@ class ObjectMaterialData:
        cls.data["materials"] = cls.materials()
        cls.data["type_material"] = cls.type_material()
        cls.data["material_type"] = cls.material_type()
+        cls.data["active_material_constituents"] = cls.active_material_constituents()
        cls.is_loaded = True

    @classmethod
@@ -318,3 +332,10 @@ class ObjectMaterialData:
        if version == "IFC2X3":
            material_types = ["IfcMaterial", "IfcMaterialLayerSet", "IfcMaterialList"]
        return [(m, m, ifcopenshell.util.doc.get_entity_doc(version, m).get("description", "")) for m in material_types]
+
+    @classmethod
+    def active_material_constituents(cls):
+        material = cls.material
+        if not cls.material or not material.is_a("IfcMaterialConstituentSet"):
+            return []
+        return [m.Name for m in material.MaterialConstituents if m.Name]
@@ -34,6 +34,7 @@ from blenderbim.bim.ifc import IfcStore
 class LoadMaterials(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.load_materials"
    bl_label = "Load Materials"
+    bl_description = "Display list of named materials"
    bl_options = {"REGISTER", "UNDO"}

    def _execute(self, context):
@@ -117,7 +118,7 @@ class AddMaterial(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.add_material"
    bl_label = "Add Material"
    bl_options = {"REGISTER", "UNDO"}
-    obj: bpy.props.StringProperty()
+    obj: bpy.props.StringProperty(name="Material Name")
    name: bpy.props.StringProperty(default="Default")

    def invoke(self, context, event):
@@ -151,7 +152,10 @@ class RemoveMaterial(bpy.types.Operator, tool.Ifc.Operator):
    material: bpy.props.IntProperty()

    def _execute(self, context):
-        core.remove_material(tool.Ifc, tool.Material, tool.Style, material=tool.Ifc.get().by_id(self.material))
+        res = core.remove_material(tool.Ifc, tool.Material, tool.Style, material=tool.Ifc.get().by_id(self.material))
+        if not res:
+            self.report({"ERROR"}, "Material is used in material sets and cannot be removed.")
+            return {"CANCELLED"}


 class RemoveMaterialSet(bpy.types.Operator, tool.Ifc.Operator):
@@ -270,6 +274,7 @@ class RemoveProfile(bpy.types.Operator, tool.Ifc.Operator):
 class AddLayer(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.add_layer"
    bl_label = "Add Layer"
+    bl_description = "The List is Ordered From Origin Point"
    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
    layer_set: bpy.props.IntProperty()
@@ -294,6 +299,7 @@ class AddLayer(bpy.types.Operator, tool.Ifc.Operator):
 class ReorderMaterialSetItem(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.reorder_material_set_item"
    bl_label = "Reorder Material Set Item"
+    bl_description = "The List is Ordered From Origin Point"
    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
    old_index: bpy.props.IntProperty()
@@ -728,6 +734,20 @@ class EnableEditingMaterialStyle(bpy.types.Operator, tool.Ifc.Operator):
        props.active_material_id = self.material
        props.editing_material_type = "STYLE"

+        # set already applied style and context if possible
+        if not 0 <= props.active_material_index < len(props.materials):
+            return
+
+        material = tool.Ifc.get().by_id(props.materials[props.active_material_index].ifc_definition_id)
+        if not material.HasRepresentation:
+            return
+
+        rep = material.HasRepresentation[0].Representations[0]  # IfcStyledRepresentation
+        props.contexts = str(rep.ContextOfItems.id())
+        style = rep.Items[0].Styles[0]
+        if style.Name:  # props.styles only has named styles
+            props.styles = str(rep.Items[0].Styles[0].id())
+

 class EditMaterialStyle(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.edit_material_style"
@@ -736,14 +756,19 @@ class EditMaterialStyle(bpy.types.Operator, tool.Ifc.Operator):

    def _execute(self, context):
        props = bpy.context.scene.BIMMaterialProperties
-        material = tool.Ifc.get().by_id(props.active_material_id)
-        style = tool.Ifc.get().by_id(int(props.styles))
-        context = tool.Ifc.get().by_id(int(props.contexts))
-        ifcopenshell.api.run(
-            "style.assign_material_style", tool.Ifc.get(), material=material, style=style, context=context
-        )
+        ifc_file = tool.Ifc.get()
+        material = ifc_file.by_id(props.active_material_id)
+        style = ifc_file.by_id(int(props.styles))
+        context = ifc_file.by_id(int(props.contexts))
+        ifcopenshell.api.run("style.assign_material_style", ifc_file, material=material, style=style, context=context)
        tool.Material.disable_editing_material()
        core.load_materials(tool.Material, props.material_type)
+        # NOTE: Update all elements that has this material and
+        # not just the ones that are using it in IfcMaterialConstituent,
+        # to handle cases where Style is connected to geometry implicitly:
+        # e.g. RepItem->IfcElement->IfcMaterial->Style
+        # instead of RepItem->ShapeAspect->Constituent->Style.
+        tool.Material.update_elements_using_material(material)


 class UnassignMaterialStyle(bpy.types.Operator, tool.Ifc.Operator):
@@ -762,3 +787,4 @@ class UnassignMaterialStyle(bpy.types.Operator, tool.Ifc.Operator):
            "style.unassign_material_style", tool.Ifc.get(), material=material, style=style, context=context
        )
        core.load_materials(tool.Material, props.material_type)
+        tool.Material.update_elements_using_material(material)
@@ -81,6 +81,8 @@ class BIM_PT_materials(Panel):

        self.layout.template_list("BIM_UL_materials", "", self.props, "materials", self.props, "active_material_index")

+        # TODO: data.py is not updated on changing active_material_index
+        # so the active material styles go out of sync with the active material
        for style in MaterialsData.data["active_styles"]:
            row = self.layout.row(align=True)
            row.label(text="", icon="SHADING_RENDERED")
@@ -228,7 +230,7 @@ class BIM_PT_object_material(Panel):
            row = self.layout.row(align=True)
            row.label(text="No Profiles Available")
            row.operator("bim.add_profile_def", icon="ADD", text="")
-        else:
+        else:            
            row = self.layout.row(align=True)
            if ObjectMaterialData.data["set_item_name"] == "profile":
                prop_with_search(row, self.mprops, "profiles", icon="ITALIC", text="")
@@ -113,6 +113,7 @@ classes = (
    covering.AddInstanceCeilingCoveringFromCursor,
    covering.RegenSelectedCoveringObject,
    space.ToggleSpaceVisibility,
+    space.ToggleHideSpaces,
    mep.FitFlowSegments,
    mep.RegenerateDistributionElement,
    prop.BIMModelProperties,
@@ -193,15 +194,18 @@ addon_keymaps = []

 def register():
    if not bpy.app.background:
-        bpy.utils.register_tool(workspace.WallTool, after={"builtin.transform"}, separator=True, group=False)
+        bpy.utils.register_tool(workspace.WallTool, after={"bim.explore_tool"}, separator=True, group=False)
        bpy.utils.register_tool(workspace.SlabTool, after={"bim.wall_tool"}, separator=False, group=False)
        bpy.utils.register_tool(workspace.DoorTool, after={"bim.slab_tool"}, separator=False, group=False)
        bpy.utils.register_tool(workspace.WindowTool, after={"bim.door_tool"}, separator=False, group=False)
        bpy.utils.register_tool(workspace.ColumnTool, after={"bim.window_tool"}, separator=False, group=False)
        bpy.utils.register_tool(workspace.BeamTool, after={"bim.column_tool"}, separator=False, group=False)
-        bpy.utils.register_tool(workspace.DuctTool, after={"bim.beam_tool"}, separator=False, group=False)
+        bpy.utils.register_tool(workspace.BimTool, after={"bim.beam_tool"}, separator=False, group=False)
+        bpy.utils.register_tool(workspace.DuctTool, after={"bim.beam_tool"}, separator=False, group=True)
        bpy.utils.register_tool(workspace.PipeTool, after={"bim.duct_tool"}, separator=False, group=False)
-        bpy.utils.register_tool(workspace.BimTool, after={"bim.pipe_tool"}, separator=False, group=False)
+        bpy.utils.register_tool(workspace.CableCarrierTool, after={"bim.pipe_tool"}, separator=False, group=False)
+        bpy.utils.register_tool(workspace.CableTool, after={"bim.cable_carrier_tool"}, separator=False, group=False)
+
    bpy.types.Scene.BIMModelProperties = bpy.props.PointerProperty(type=prop.BIMModelProperties)
    bpy.types.Object.BIMArrayProperties = bpy.props.PointerProperty(type=prop.BIMArrayProperties)
    bpy.types.Object.BIMStairProperties = bpy.props.PointerProperty(type=prop.BIMStairProperties)
@@ -210,6 +214,7 @@ def register():
    bpy.types.Object.BIMDoorProperties = bpy.props.PointerProperty(type=prop.BIMDoorProperties)
    bpy.types.Object.BIMRailingProperties = bpy.props.PointerProperty(type=prop.BIMRailingProperties)
    bpy.types.Object.BIMRoofProperties = bpy.props.PointerProperty(type=prop.BIMRoofProperties)
+
    bpy.types.VIEW3D_MT_mesh_add.append(ui.add_mesh_object_menu)
    bpy.types.VIEW3D_MT_add.append(ui.add_menu)
    bpy.app.handlers.load_post.append(handler.load_post)
@@ -231,6 +236,8 @@ def unregister():
        bpy.utils.unregister_tool(workspace.BeamTool)
        bpy.utils.unregister_tool(workspace.DuctTool)
        bpy.utils.unregister_tool(workspace.PipeTool)
+        bpy.utils.unregister_tool(workspace.CableCarrierTool)
+        bpy.utils.unregister_tool(workspace.CableTool)
        bpy.utils.unregister_tool(workspace.BimTool)
    del bpy.types.Scene.BIMModelProperties
    del bpy.types.Object.BIMArrayProperties
@@ -23,6 +23,7 @@ from math import sin, cos, radians
 from bpy.types import SpaceView3D
 from mathutils import Vector, Matrix
 from gpu_extras.batch import batch_for_shader
+from typing import Union


 ERROR_ELEMENTS_COLOR = (1, 0.2, 0.322, 1)  # RED
@@ -35,15 +36,6 @@ def transparent_color(color, alpha=0.1):
    return color


-def bm_check_vertex_in_groups(vertex, deform_layer, groups):
-    """returns tuple boolean (whether vertex is in any of the groups)
-    and related group index"""
-    for group_index in vertex[deform_layer].keys():
-        if group_index in groups:
-            return True, group_index
-    return False, None
-
-
 class ProfileDecorator:
    installed = None

@@ -148,12 +140,12 @@ class ProfileDecorator:
            # deform_layer is None if there are no verts assigned to vertex groups
            # even if there are vertex groups in the obj.vertex_groups
            if deform_layer:
-                is_arc, group_index = bm_check_vertex_in_groups(vertex, deform_layer, arc_groups)
+                is_arc, group_index = tool.Blender.bmesh_check_vertex_in_groups(vertex, deform_layer, arc_groups)
                if is_arc:
                    arcs.setdefault(group_index, []).append(vertex)
                    special_vertex_indices[vertex.index] = group_index

-                is_circle, group_index = bm_check_vertex_in_groups(vertex, deform_layer, circle_groups)
+                is_circle, group_index = tool.Blender.bmesh_check_vertex_in_groups(vertex, deform_layer, circle_groups)
                if is_circle:
                    circles.setdefault(group_index, []).append(vertex)
                    special_vertex_indices[vertex.index] = group_index
@@ -542,7 +542,7 @@ class MEPGenerator:
            ifc_representation_class=None,
        )

-        rel = ifcopenshell.api.run("material.assign_material", ifc_file, product=element, type="IfcMaterialProfileSet")
+        rel = ifcopenshell.api.run("material.assign_material", ifc_file, products=[element], type="IfcMaterialProfileSet")
        profile_set = rel.RelatingMaterial
        material_profile = ifcopenshell.api.run(
            "material.add_profile", ifc_file, profile_set=profile_set, material=material
@@ -24,16 +24,20 @@ import shapely
 import logging
 import numpy as np
 import ifcopenshell
+import ifcopenshell.api
+import ifcopenshell.geom
 import ifcopenshell.util.shape
 import ifcopenshell.util.element
 import ifcopenshell.util.shape_builder
+import ifcopenshell.util.placement
 import ifcopenshell.util.representation
+import ifcopenshell.util.unit
 import blenderbim.tool as tool
 import blenderbim.core.geometry
 import blenderbim.bim.import_ifc as import_ifc
 import blenderbim.bim.handler
 from blenderbim.bim.ifc import IfcStore
-from math import pi
+from math import pi, radians
 from mathutils import Vector, Matrix
 from bpy.types import Operator
 from bpy.types import SpaceView3D
@@ -87,20 +91,28 @@ class FilledOpeningGenerator:

            # In this prototype, we assume openings are only added to axis-based elements
            layers = tool.Model.get_material_layer_parameters(element)
-            axis = tool.Model.get_wall_axis(voided_obj, layers=layers)["base"]
+            if layers["layer_set_direction"] == "AXIS2":
+                axis = tool.Model.get_wall_axis(voided_obj, layers=layers)["base"]
+                new_matrix = voided_obj.matrix_world.copy()
+                point_on_axis = tool.Cad.point_on_edge(target, axis)
+                new_matrix.translation.x = point_on_axis.x
+                new_matrix.translation.y = point_on_axis.y

-            new_matrix = voided_obj.matrix_world.copy()
-            point_on_axis = tool.Cad.point_on_edge(target, axis)
-            new_matrix.translation.x = point_on_axis.x
-            new_matrix.translation.y = point_on_axis.y
-
-            if should_set_z_level:
-                if filling.is_a("IfcDoor"):
-                    new_matrix.translation.z = voided_obj.matrix_world.translation.z
+                if should_set_z_level:
+                    if filling.is_a("IfcDoor"):
+                        new_matrix.translation.z = voided_obj.matrix_world.translation.z
+                    else:
+                        new_matrix.translation.z = voided_obj.matrix_world.translation.z + props.rl2
                else:
-                    new_matrix.translation.z = voided_obj.matrix_world.translation.z + props.rl2
-            else:
-                new_matrix.translation.z = filling_obj.matrix_world.copy().translation.z
+                    new_matrix.translation.z = filling_obj.matrix_world.copy().translation.z
+            elif layers["layer_set_direction"] == "AXIS3":
+                new_matrix = voided_obj.matrix_world.copy()
+                local_position_on_voided_obj = raycast[1]
+                # Equivalent to "side Z" for a wall axis, so that stuff like skylights appear on the top.
+                local_position_on_voided_obj.z = layers["offset"] + layers["thickness"]
+                new_matrix.translation.xyz = voided_obj.matrix_world @ local_position_on_voided_obj
+                rotation_matrix = Matrix.Rotation(radians(-90), 4, "X")
+                new_matrix @= rotation_matrix

            filling_obj.matrix_world = new_matrix
            bpy.context.view_layer.update()
@@ -176,7 +188,13 @@ class FilledOpeningGenerator:
                )

    def regenerate_from_type(self, usecase_path, ifc_file, settings):
-        filling = settings["related_object"]
+        relating_type = settings["relating_type"]
+
+        for related_object in settings["related_objects"]:
+            self._regenerate_from_type(related_object)
+
+    def _regenerate_from_type(self, related_object: ifcopenshell.entity_instance) -> None:
+        filling = related_object
        if not getattr(filling, "FillsVoids", None):
            return

@@ -521,6 +539,7 @@ class AddBoolean(Operator, tool.Ifc.Operator):
            return {"FINISHED"}
        if element2 and not element1:
            obj1, obj2 = obj2, obj1
+            element1, element2 = element2, element1
        if not obj1.data or not hasattr(obj1.data, "BIMMeshProperties"):
            return {"FINISHED"}
        representation = tool.Ifc.get().by_id(obj1.data.BIMMeshProperties.ifc_definition_id)
@@ -668,17 +687,17 @@ class RemoveBooleans(Operator, tool.Ifc.Operator, AddObjectHelper):
            except:
                continue

-            boolean = None
+            boolean_id = None
            for inverse in tool.Ifc.get().get_inverse(item):
                if inverse.is_a("IfcBooleanResult"):
-                    boolean = inverse
+                    boolean_id = inverse.id()
                    break
            ifcopenshell.api.run("geometry.remove_boolean", tool.Ifc.get(), item=item)

            if obj.data.BIMMeshProperties.obj:
                upstream_obj = obj.data.BIMMeshProperties.obj
                element = tool.Ifc.get_entity(upstream_obj)
-                bbim_boolean_updates.setdefault(element, []).append(boolean)
+                bbim_boolean_updates.setdefault(element, []).append(boolean_id)
                body = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
                if body:
                    blenderbim.core.geometry.switch_representation(
@@ -692,8 +711,8 @@ class RemoveBooleans(Operator, tool.Ifc.Operator, AddObjectHelper):
                    )
            bpy.data.objects.remove(obj)

-        for element, booleans in bbim_boolean_updates.items():
-            tool.Model.unmark_manual_booleans(element, booleans)
+        for element, boolean_ids in bbim_boolean_updates.items():
+            tool.Model.unmark_manual_booleans(element, boolean_ids)

        tool.Blender.set_active_object(upstream_obj)
        return {"FINISHED"}
@@ -761,8 +780,6 @@ class EditOpenings(Operator, tool.Ifc.Operator):
    def _execute(self, context):
        props = bpy.context.scene.BIMModelProperties
        building_objs = set()
-        model = tool.Ifc.get()
-        all_openings = model.by_type("IfcOpeningElement")

        for obj in context.selected_objects:
            element = tool.Ifc.get_entity(obj)
@@ -773,23 +790,32 @@ class EditOpenings(Operator, tool.Ifc.Operator):
                obj = tool.Ifc.get_object(element)
            openings = [r.RelatedOpeningElement for r in element.HasOpenings]
            for opening in openings:
-                similar_openings = [o for o in all_openings if o.ObjectPlacement == opening.ObjectPlacement]
                opening_obj = tool.Ifc.get_object(opening)
                building_objs.add(obj)
+
+                similar_openings = blenderbim.core.geometry.get_similar_openings(tool.Ifc, opening)
+                similar_openings_building_objs = blenderbim.core.geometry.get_similar_openings_building_objs(
+                    tool.Ifc, similar_openings
+                )
+                building_objs.update(similar_openings_building_objs)
+
                if opening_obj:
                    if tool.Ifc.is_edited(opening_obj):
                        tool.Geometry.run_geometry_update_representation(obj=opening_obj)
+                        blenderbim.core.geometry.edit_similar_opening_placement(
+                            tool.Geometry, opening, similar_openings
+                        )
                    elif tool.Ifc.is_moved(opening_obj):
                        blenderbim.core.geometry.edit_object_placement(
                            tool.Ifc, tool.Geometry, tool.Surveyor, obj=opening_obj
                        )
-                    for similar_opening in similar_openings:
-                        similar_opening.ObjectPlacement = opening.ObjectPlacement
-                        element = similar_opening.VoidsElements[0].RelatingBuildingElement
-                        obj = tool.Ifc.get_object(element)
-                        building_objs.add(obj)
+                        blenderbim.core.geometry.edit_similar_opening_placement(
+                            tool.Geometry, opening, similar_openings
+                        )

-                    building_objs.update(self.get_all_building_objects_of_similar_openings(opening))
+                    building_objs.update(
+                        self.get_all_building_objects_of_similar_openings(opening)
+                    )  # NB this has nothing to do with clone similar_opening
                    tool.Ifc.unlink(element=opening, obj=opening_obj)
                    bpy.data.objects.remove(opening_obj)

@@ -25,9 +25,13 @@ import ifcopenshell.util.system
 import ifcopenshell.util.element
 import ifcopenshell.util.placement
 import ifcopenshell.util.representation
+import ifcopenshell.util.type
+import ifcopenshell.util.unit
 import blenderbim.tool as tool
+import blenderbim.core.aggregate
 import blenderbim.core.type
 import blenderbim.core.geometry
+import blenderbim.core.spatial
 from . import wall, slab, profile, mep
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.module.model.data import AuthoringData
@@ -273,7 +277,7 @@ class AddConstrTypeInstance(bpy.types.Operator):
            obj.location[2] = collection_obj.location[2] + bpy.context.scene.BIMModelProperties.rl2

    @staticmethod
-    def generate_layered_element(ifc_class, relating_type):
+    def generate_layered_element(ifc_class: str, relating_type: ifcopenshell.entity_instance) -> bool:
        layer_set_direction = None

        parametric = ifcopenshell.util.element.get_psets(relating_type).get("EPset_Parametric")
@@ -297,6 +301,7 @@ class AddConstrTypeInstance(bpy.types.Operator):
            material = ifcopenshell.util.element.get_material(tool.Ifc.get_entity(obj))
            material.LayerSetDirection = layer_set_direction
            return True
+        return False


 class ChangeTypePage(bpy.types.Operator, tool.Ifc.Operator):
@@ -510,7 +515,7 @@ def ensure_material_assigned(usecase_path, ifc_file, settings):
    if usecase_path == "material.assign_material":
        if not settings.get("material", None):
            return
-        elements = [settings["product"]]
+        elements = settings["products"]
    else:
        elements = []
        for rel in ifc_file.by_type("IfcRelAssociatesMaterial"):
@@ -546,7 +551,7 @@ def ensure_material_assigned(usecase_path, ifc_file, settings):


 def ensure_material_unassigned(usecase_path, ifc_file, settings):
-    elements = [settings["product"]]
+    elements = settings["products"]
    if elements[0].is_a("IfcElementType"):
        elements.extend(ifcopenshell.util.element.get_types(elements[0]))
    for element in elements:
@@ -21,14 +21,18 @@ import copy
 import bmesh
 import mathutils.geometry
 import ifcopenshell
+import ifcopenshell.api
 import ifcopenshell.util.type
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
+import ifcopenshell.util.placement
+import ifcopenshell.util.representation
 import blenderbim.bim.handler
 import blenderbim.tool as tool
 import blenderbim.core.type
 import blenderbim.core.geometry
 import blenderbim.core.material
+import blenderbim.core.root
 from math import pi, degrees, inf
 from mathutils import Vector, Matrix, Quaternion
 from blenderbim.bim.module.geometry.helper import Helper
@@ -92,7 +96,7 @@ class DumbProfileGenerator:
            should_add_representation=False,
            context=self.body_context,
        )
-        ifcopenshell.api.run("type.assign_type", self.file, related_object=element, relating_type=self.relating_type)
+        ifcopenshell.api.run("type.assign_type", self.file, related_objects=[element], relating_type=self.relating_type)

        material = ifcopenshell.util.element.get_material(element)
        material.CardinalPoint = self.cardinal_point
@@ -207,12 +211,19 @@ class DumbProfileRegenerator:
        return results

    def regenerate_from_type(self, usecase_path, ifc_file, settings):
-        obj = tool.Ifc.get_object(settings["related_object"])
-        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
-            return
-        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        relating_type = settings["relating_type"]
+
+        new_material = ifcopenshell.util.element.get_material(relating_type)
        if not new_material or not new_material.is_a("IfcMaterialProfileSet"):
            return
+
+        for related_object in settings["related_objects"]:
+            self._regenerate_from_type(related_object)
+
+    def _regenerate_from_type(self, related_object: ifcopenshell.entity_instance) -> None:
+        obj = tool.Ifc.get_object(related_object)
+        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
+            return
        DumbProfileRecalculator().recalculate([obj])


@@ -1013,17 +1024,30 @@ class EditExtrusionAxis(bpy.types.Operator, tool.Ifc.Operator):
        obj = context.active_object
        element = tool.Ifc.get_entity(obj)

-        start = obj.matrix_world @ obj.data.vertices[0].co.copy()
-        end = obj.matrix_world @ obj.data.vertices[1].co.copy()
+        matrix = obj.matrix_world
+        previous_z_axis = matrix.col[2].to_3d().normalized()
+
+        start = matrix @ obj.data.vertices[0].co
+        end = matrix @ obj.data.vertices[1].co
        depth = (end - start).length
        z_axis = (end - start).normalized()
-        y_axis = Vector((0, 0, 1))
-        # making sure z_axis != y_axis
-        if z_axis == y_axis:
-            y_axis = Vector((0, 1, 0))

-        x_axis = y_axis.cross(z_axis).normalized()
-        y_axis = z_axis.cross(x_axis).normalized()
+        # if z-axis didn't changed we can just reuse the previous rotation
+        if not tool.Cad.are_vectors_equal(previous_z_axis, z_axis):
+            y_axis = Vector((0, 0, 1))
+            # making sure z_axis != y_axis
+            if z_axis == y_axis:
+                y_axis = Vector((0, 1, 0))
+
+            x_axis = y_axis.cross(z_axis).normalized()
+            y_axis = z_axis.cross(x_axis).normalized()
+
+            # update basises
+            matrix.col[0].xyz = x_axis
+            matrix.col[1].xyz = y_axis
+            matrix.col[2].xyz = z_axis
+
+        matrix.translation = start

        body = ifcopenshell.util.representation.get_representation(element, "Model", "Body", "MODEL_VIEW")
        blenderbim.core.geometry.switch_representation(
@@ -1036,16 +1060,6 @@ class EditExtrusionAxis(bpy.types.Operator, tool.Ifc.Operator):
            should_sync_changes_first=False,
        )

-        matrix = Matrix(
-            (
-                [x_axis[0], y_axis[0], z_axis[0], start.x],
-                [x_axis[1], y_axis[1], z_axis[1], start.y],
-                [x_axis[2], y_axis[2], z_axis[2], start.z],
-                [0, 0, 0, 1],
-            )
-        )
-
-        obj.matrix_world = matrix
        bpy.context.view_layer.update()

        joiner = DumbProfileJoiner()
@@ -99,7 +99,10 @@ class BIMModelProperties(PropertyGroup):
        items=[("CLASS", "By Class", ""), ("TYPE", "By Type", ""), ("CUSTOM", "Custom", "")],
        name="Occurrence Name Style",
    )
-    occurrence_name_function: bpy.props.StringProperty(name="Occurrence Name Function")
+    occurrence_name_function: bpy.props.StringProperty(
+        name="Occurrence Name Function",
+        description="Code that will be evaluated to generate occurrence name for CUSTOM occurrence name style",
+    )
    getter_enum = {"ifc_class": get_ifc_class, "relating_type": get_relating_type_id}
    extrusion_depth: bpy.props.FloatProperty(min=0.001, default=42.0, subtype="DISTANCE")
    cardinal_point: bpy.props.EnumProperty(
@@ -234,7 +237,6 @@ class BIMStairProperties(PropertyGroup):
        unit="LENGTH",
        size=2,
    )
-    # TODO: need to clamp at zero for non WOOD/STEEL
    nosing_length: bpy.props.FloatProperty(
        name="Nosing Length",
        description=(
@@ -712,8 +714,15 @@ class BIMRoofProperties(PropertyGroup):
    height: bpy.props.FloatProperty(
        name="Height", default=1.0, description="Maximum height of the roof to be generated.", subtype="DISTANCE"
    )
-    angle: bpy.props.FloatProperty(name="Slope Angle", default=pi / 18, subtype="ANGLE", update=lambda self, context: self.update_percentage())
-    percentage: bpy.props.FloatProperty(name="Slope %", default=17.63269754733197, subtype="PERCENTAGE", update=lambda self, context: self.update_angle())
+    angle: bpy.props.FloatProperty(
+        name="Slope Angle", default=pi / 18, subtype="ANGLE", update=lambda self, context: self.update_percentage()
+    )
+    percentage: bpy.props.FloatProperty(
+        name="Slope %",
+        default=math.tan(pi / 18) * 100,
+        subtype="PERCENTAGE",
+        update=lambda self, context: self.update_angle(),
+    )
    roof_thickness: bpy.props.FloatProperty(name="Roof Thickness", default=0.1, subtype="DISTANCE")
    rafter_edge_angle: bpy.props.FloatProperty(name="Rafter Edge Angle", min=0, max=pi, default=pi / 2, subtype="ANGLE")

@@ -745,4 +754,4 @@ class BIMRoofProperties(PropertyGroup):
        self.angle = math.atan(self.percentage / 100)

    def update_percentage(self):
-        self.percentage = math.tan(self.angle)*100
+        self.percentage = math.tan(self.angle) * 100
@@ -20,17 +20,22 @@ import bpy
 import json
 import bmesh
 import ifcopenshell
-import ifcopenshell.util.type
-import ifcopenshell.util.unit
+import ifcopenshell.api
 import ifcopenshell.util.element
+import ifcopenshell.util.placement
+import ifcopenshell.util.representation
+import ifcopenshell.util.unit
+import ifcopenshell.util.type
 import blenderbim.bim.handler
 import blenderbim.core.type
 import blenderbim.core.geometry
+import blenderbim.core.root
 import blenderbim.tool as tool
 from math import radians
 from mathutils import Vector, Matrix
 from blenderbim.bim.module.geometry.helper import Helper
 from blenderbim.bim.module.model.decorator import ProfileDecorator
+from typing import Optional


 def calculate_quantities(usecase_path, ifc_file, settings):
@@ -110,7 +115,7 @@ def calculate_quantities(usecase_path, ifc_file, settings):


 class DumbSlabGenerator:
-    def __init__(self, relating_type):
+    def __init__(self, relating_type: ifcopenshell.entity_instance):
        self.relating_type = relating_type

    def generate(self):
@@ -173,7 +178,7 @@ class DumbSlabGenerator:
            should_add_representation=False,
            context=self.body_context,
        )
-        ifcopenshell.api.run("type.assign_type", self.file, related_object=element, relating_type=self.relating_type)
+        ifcopenshell.api.run("type.assign_type", self.file, related_objects=[element], relating_type=self.relating_type)

        blenderbim.core.geometry.edit_object_placement(tool.Ifc, tool.Geometry, tool.Surveyor, obj=obj)
        representation = ifcopenshell.api.run(
@@ -246,27 +251,38 @@ class DumbSlabPlaner:
                            self.change_thickness(element, total_thickness)

    def regenerate_from_type(self, usecase_path, ifc_file, settings):
-        obj = tool.Ifc.get_object(settings["related_object"])
-        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
-            return
-        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
-        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        relating_type = settings["relating_type"]
+
+        new_material = ifcopenshell.util.element.get_material(relating_type)
        if not new_material or not new_material.is_a("IfcMaterialLayerSet"):
            return
+
        parametric = ifcopenshell.util.element.get_psets(settings["relating_type"]).get("EPset_Parametric")
        layer_set_direction = None
        if parametric:
            layer_set_direction = parametric.get("LayerSetDirection", layer_set_direction)
        new_thickness = sum([l.LayerThickness for l in new_material.MaterialLayers])
-        material = ifcopenshell.util.element.get_material(settings["related_object"])
+
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        for related_object in settings["related_objects"]:
+            self._regenerate_from_type(related_object, layer_set_direction, new_thickness)
+
+    def _regenerate_from_type(
+        self, related_object: ifcopenshell.entity_instance, layer_set_direction: Optional[str], new_thickness: float
+    ) -> None:
+        obj = tool.Ifc.get_object(related_object)
+        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
+            return
+
+        material = ifcopenshell.util.element.get_material(related_object)
        if not material or not material.is_a("IfcMaterialLayerSetUsage"):
            return
        if layer_set_direction:
            material.LayerSetDirection = layer_set_direction
        if material.LayerSetDirection == "AXIS3":
-            self.change_thickness(settings["related_object"], new_thickness)
+            self.change_thickness(related_object, new_thickness)

-    def change_thickness(self, element, thickness):
+    def change_thickness(self, element: ifcopenshell.entity_instance, thickness: float) -> None:
        body_context = ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Model", "Body", "MODEL_VIEW")
        obj = tool.Ifc.get_object(element)
        if not obj:
@@ -698,9 +714,7 @@ class EditExtrusionProfile(bpy.types.Operator, tool.Ifc.Operator):
        new_footprint = ifcopenshell.api.run(
            "geometry.add_footprint_representation", tool.Ifc.get(), context=footprint_context, curves=curves
        )
-        old_footprint = ifcopenshell.util.representation.get_representation(
-            element, "Plan", "FootPrint", "SKETCH_VIEW"
-        )
+        old_footprint = ifcopenshell.util.representation.get_representation(element, "Plan", "FootPrint", "SKETCH_VIEW")
        if old_footprint:
            for inverse in tool.Ifc.get().get_inverse(old_footprint):
                ifcopenshell.util.element.replace_attribute(inverse, old_footprint, new_footprint)
@@ -29,13 +29,19 @@ class GenerateSpace(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.generate_space"
    bl_label = "Generate Space"
    bl_options = {"REGISTER"}
-    bl_description = "Create a space from the cursor position. Move the cursor position into the desired position, select the right space collection and run the operator"
+    bl_description = (
+        "Create a space from the cursor position. "
+        "Move the cursor position into the desired position, "
+        "select the right space collection and run the operator"
+    )

    @classmethod
    def poll(cls, context):
        collection = context.view_layer.active_layer_collection.collection
        collection_obj = collection.BIMCollectionProperties.obj
-        return tool.Ifc.get_entity(collection_obj)
+        active_obj = context.active_object
+        element = tool.Ifc.get_entity(active_obj)
+        return tool.Ifc.get_entity(collection_obj) and not element.is_a("IfcWall")

    def _execute(self, context):
        # This works as a 2.5 extruded polygon based on a cutting plane. Note
@@ -45,16 +51,14 @@ class GenerateSpace(bpy.types.Operator, tool.Ifc.Operator):
        def msg(self, context):
            self.layout.label(text="NO ACTIVE STOREY")

-#        props = context.scene.BIMModelProperties
-
        collection = context.view_layer.active_layer_collection.collection
        collection_obj = collection.BIMCollectionProperties.obj
        if not collection_obj:
-            bpy.context.window_manager.popup_menu(msg, title="Error", icon="ERROR")
+            context.window_manager.popup_menu(msg, title="Error", icon="ERROR")
            return
        spatial_element = tool.Ifc.get_entity(collection_obj)
        if not spatial_element:
-            bpy.context.window_manager.popup_menu(msg, title="Error", icon="ERROR")
+            context.window_manager.popup_menu(msg, title="Error", icon="ERROR")
            return

        core.generate_space(tool.Ifc, tool.Spatial, tool.Model, tool.Type)
@@ -68,7 +72,7 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):

    @classmethod
    def poll(cls, context):
-        active_obj = bpy.context.active_object
+        active_obj = context.active_object
        element = tool.Ifc.get_entity(active_obj)
        if element:
            return context.selected_objects and element.is_a("IfcWall")
@@ -79,7 +83,7 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
        # In order to run, the active object must be a wall and
        # there must be selected walls

-        active_obj = bpy.context.active_object
+        active_obj = context.active_object
        element = tool.Ifc.get_entity(active_obj)
        container = tool.Spatial.get_container(element)

@@ -94,19 +98,30 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
        if not container:
            self.report({"ERROR"}, "The wall is not contained.")

-        if not bpy.context.selected_objects:
+        if not context.selected_objects:
            self.report({"ERROR"}, "No selected objects found. Please select walls.")
            return

        core.generate_spaces_from_walls(tool.Ifc, tool.Spatial, tool.Collector)

+
 class ToggleSpaceVisibility(bpy.types.Operator, tool.Ifc.Operator):
    bl_idname = "bim.toggle_space_visibility"
    bl_label = "Toggle Space Visibility"
    bl_options = {"REGISTER"}
    bl_description = "Change the space visibility"

-    def execute(cls, context):
+    def execute(self, context):
        core.toggle_space_visibility(tool.Ifc, tool.Spatial)
        return {"FINISHED"}

+
+class ToggleHideSpaces(bpy.types.Operator, tool.Ifc.Operator):
+    bl_idname = "bim.toggle_hide_spaces"
+    bl_label = "Toggle Hide Spaces"
+    bl_options = {"REGISTER"}
+    bl_description = "Hide or Unhide all spaces"
+
+    def execute(self, context):
+        core.toggle_hide_spaces(tool.Ifc, tool.Spatial)
+        return {"FINISHED"}
@@ -54,8 +54,10 @@ class LaunchTypeManager(bpy.types.Operator):
        props.type_page = 1
        if get_ifc_class(None, context):
            ifc_class = props.ifc_class or AuthoringData.data["ifc_element_type"]
-            props.type_class = ifc_class
-            bpy.ops.bim.load_type_thumbnails(ifc_class=ifc_class, offset=0, limit=9)
+        else:
+            ifc_class = AuthoringData.data["ifc_element_type"]
+        props.type_class = ifc_class
+        bpy.ops.bim.load_type_thumbnails(ifc_class=ifc_class, offset=0, limit=9)
        return context.window_manager.invoke_popup(self, width=550)

    def draw(self, context):
@@ -24,7 +24,9 @@ import ifcopenshell
 import ifcopenshell.api
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
+import ifcopenshell.util.placement
 import ifcopenshell.util.representation
+import ifcopenshell.util.type
 import mathutils.geometry
 import blenderbim.bim.handler
 import blenderbim.core.type
@@ -35,6 +37,7 @@ from blenderbim.bim.ifc import IfcStore
 from math import pi, sin, cos, degrees, radians
 from mathutils import Vector, Matrix
 from blenderbim.bim.module.model.opening import FilledOpeningGenerator
+from typing import Optional


 class JoinWall(bpy.types.Operator, tool.Ifc.Operator):
@@ -555,7 +558,10 @@ class DumbWallGenerator:
                for face in sibling_obj.data.polygons:
                    normal = (sibling_obj.matrix_world.to_quaternion() @ face.normal).normalized()
                    face_center = sibling_obj.matrix_world @ face.center
-                    if normal.z != 0 or abs(mathutils.geometry.distance_point_to_plane(self.location, face_center, normal)) > 0.01:
+                    if (
+                        normal.z != 0
+                        or abs(mathutils.geometry.distance_point_to_plane(self.location, face_center, normal)) > 0.01
+                    ):
                        continue

                    rotation = math.atan2(normal[1], normal[0])
@@ -603,7 +609,7 @@ class DumbWallGenerator:
            should_add_representation=False,
            context=self.body_context,
        )
-        ifcopenshell.api.run("type.assign_type", self.file, related_object=element, relating_type=self.relating_type)
+        ifcopenshell.api.run("type.assign_type", self.file, related_objects=[element], relating_type=self.relating_type)
        if self.axis_context:
            representation = ifcopenshell.api.run(
                "geometry.add_axis_representation",
@@ -724,18 +730,29 @@ class DumbWallPlaner:
        DumbWallRecalculator().recalculate([w for w in set(walls) if w])

    def regenerate_from_type(self, usecase_path, ifc_file, settings):
-        obj = tool.Ifc.get_object(settings["related_object"])
-        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
-            return
-        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
-        new_material = ifcopenshell.util.element.get_material(settings["relating_type"])
+        relating_type = settings["relating_type"]
+
+        new_material = ifcopenshell.util.element.get_material(relating_type)
        if not new_material or not new_material.is_a("IfcMaterialLayerSet"):
            return
-        parametric = ifcopenshell.util.element.get_psets(settings["relating_type"]).get("EPset_Parametric")
+
+        parametric = ifcopenshell.util.element.get_psets(relating_type).get("EPset_Parametric")
        layer_set_direction = None
        if parametric:
            layer_set_direction = parametric.get("LayerSetDirection", layer_set_direction)
-        material = ifcopenshell.util.element.get_material(settings["related_object"])
+
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(ifc_file)
+        for related_object in settings["related_objects"]:
+            self._regenerate_from_type(related_object, layer_set_direction)
+
+    def _regenerate_from_type(
+        self, related_object: ifcopenshell.entity_instance, layer_set_direction: Optional[str]
+    ) -> None:
+        obj = tool.Ifc.get_object(related_object)
+        if not obj or not obj.data or not obj.data.BIMMeshProperties.ifc_definition_id:
+            return
+
+        material = ifcopenshell.util.element.get_material(related_object)
        if not material or not material.is_a("IfcMaterialLayerSetUsage"):
            return
        if layer_set_direction:
@@ -854,11 +871,11 @@ class DumbWallJoiner:
            if (location_on_base - location).length < (location_on_side - location).length:
                axis_offset = location_on_side - location_on_base
                offset_from_axis = location_on_base - location
-                opening_matrix.translation = (location_on_base - axis_offset - offset_from_axis)
+                opening_matrix.translation = location_on_base - axis_offset - offset_from_axis
            else:
                axis_offset = location_on_side - location_on_base
                offset_from_axis = location_on_side - location
-                opening_matrix.translation = (location_on_side - axis_offset - offset_from_axis)
+                opening_matrix.translation = location_on_side - axis_offset - offset_from_axis
            opening_matrixes[opening] = opening_matrix

            for filling in [r.RelatedBuildingElement for r in opening.HasFillings]:
@@ -871,11 +888,11 @@ class DumbWallJoiner:
                if (location_on_base - location).length < (location_on_side - location).length:
                    axis_offset = location_on_side - location_on_base
                    offset_from_axis = location_on_base - location
-                    filling_matrix.translation = (location_on_base - axis_offset - offset_from_axis)
+                    filling_matrix.translation = location_on_base - axis_offset - offset_from_axis
                else:
                    axis_offset = location_on_side - location_on_base
                    offset_from_axis = location_on_side - location
-                    filling_matrix.translation = (location_on_side - axis_offset - offset_from_axis)
+                    filling_matrix.translation = location_on_side - axis_offset - offset_from_axis
                filling_matrixes[filling] = filling_matrix

        self.recreate_wall(element1, wall1, axis1["reference"], axis1["reference"])
@@ -1120,13 +1137,8 @@ class DumbWallJoiner:
                other = tool.Ifc.get_object(rel.RelatedElement)
                if connection not in ["ATPATH", "NOTDEFINED"]:
                    self.join(
-                        obj, 
-                        other, 
-                        connection, 
-                        rel.RelatedConnectionType, 
-                        is_relating=True, 
-                        description=rel.Description
-                  )
+                        obj, other, connection, rel.RelatedConnectionType, is_relating=True, description=rel.Description
+                    )
        for rel in element.ConnectedFrom:
            if rel.is_a("IfcRelConnectsPathElements"):
                connection = rel.RelatedConnectionType
@@ -1226,6 +1238,7 @@ class DumbWallJoiner:
        # If opening has filling then stick to the filling's position
        # We're applying new openings position only after wall position is applied
        for opening in [r.RelatedOpeningElement for r in element.HasOpenings if r.RelatedOpeningElement.HasFillings]:
+            similar_openings = blenderbim.core.geometry.get_similar_openings(tool.Ifc, opening)
            filling_obj = tool.Ifc.get_object(opening.HasFillings[0].RelatedBuildingElement)
            filling_moved = tool.Ifc.is_moved(filling_obj)
            if filling_moved:
@@ -1234,6 +1247,7 @@ class DumbWallJoiner:
                ifcopenshell.api.run(
                    "geometry.edit_object_placement", tool.Ifc.get(), product=opening, matrix=filling_obj.matrix_world
                )
+                blenderbim.core.geometry.edit_similar_opening_placement(tool.Geometry, opening, similar_openings)

        blenderbim.core.geometry.switch_representation(
            tool.Ifc,
@@ -176,6 +176,21 @@ class DuctTool(BimTool):
        BimToolUI.draw(context, layout, ifc_element_type=cls.ifc_element_type)


+class CableCarrierTool(BimTool):
+    bl_space_type = "VIEW_3D"
+    bl_context_mode = "OBJECT"
+    bl_idname = "bim.cable_carrier_tool"
+    bl_label = "Create Cable Carrier"
+    bl_description = "Create and edit cable carriers"
+    bl_icon = os.path.join(os.path.dirname(__file__), "ops.authoring.cablecarrier")
+    bl_widget = None
+    ifc_element_type = "IfcCableCarrierSegmentType"
+
+    @classmethod
+    def draw_settings(cls, context, layout, ws_tool):
+        BimToolUI.draw(context, layout, ifc_element_type=cls.ifc_element_type)
+
+
 class PipeTool(BimTool):
    bl_space_type = "VIEW_3D"
    bl_context_mode = "OBJECT"
@@ -191,6 +206,21 @@ class PipeTool(BimTool):
        BimToolUI.draw(context, layout, ifc_element_type=cls.ifc_element_type)


+class CableTool(BimTool):
+    bl_space_type = "VIEW_3D"
+    bl_context_mode = "OBJECT"
+    bl_idname = "bim.cable_tool"
+    bl_label = "Create Cable"
+    bl_description = "Create and edit cables"
+    bl_icon = os.path.join(os.path.dirname(__file__), "ops.authoring.cable")
+    bl_widget = None
+    ifc_element_type = "IfcCableSegmentType"
+
+    @classmethod
+    def draw_settings(cls, context, layout, ws_tool):
+        BimToolUI.draw(context, layout, ifc_element_type=cls.ifc_element_type)
+
+
 def add_layout_hotkey_operator(layout, text, hotkey, description):
    modifiers = {
        "A": "EVENT_ALT",
@@ -486,20 +516,21 @@ class BimToolUI:
                prop_with_search(row, cls.props, "relating_type_id", text="")
            else:
                row.label(text="No Construction Type", icon="FILE_3D")
-            row.operator("bim.launch_type_manager", icon="LIGHTPROBE_GRID", text="")
+            row.operator("bim.launch_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="")
        else:
            if AuthoringData.data["ifc_element_type"]:
                row.label(text=f"No {AuthoringData.data['ifc_element_type']} Found", icon="ERROR")
                row = cls.layout.row()
                row.prop(cls.props, "type_name")
-                row = cls.layout.row()
+                row = cls.layout.row(align=True)
                op = row.operator(
                    "bim.add_default_type", icon="ADD", text=f"Add {AuthoringData.data['ifc_element_type']}"
                )
                op.ifc_element_type = AuthoringData.data["ifc_element_type"]
+                row.operator("bim.launch_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="")
            else:
                row.label(text="No Element Types Found", icon="ERROR")
-                row.operator("bim.launch_type_manager", icon="LIGHTPROBE_GRID", text="Launch Type Manager")
+                row.operator("bim.launch_type_manager", icon=tool.Blender.TYPE_MANAGER_ICON, text="Launch Type Manager")

    @classmethod
    def draw_basic_bim_tool_interface(cls):
@@ -100,6 +100,7 @@ class ExecuteIfcPatch(bpy.types.Operator):
            }
        )
        ifcpatch.write(output, ifc_patch_output)
+        self.report({"INFO"}, f"{props.ifc_patch_recipes} patch executed successfully")
        return {"FINISHED"}


@@ -18,6 +18,7 @@

 import bpy
 import importlib
+import importlib.util
 from pathlib import Path
 import ifcpatch
 from blenderbim.bim.prop import StrProperty, Attribute
@@ -17,26 +17,35 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

 import bpy
-from . import ui, prop, operator
+from . import ui, prop, operator, workspace, gizmo, decorator

 classes = (
    operator.AppendEntireLibrary,
+    operator.AppendInspectedLinkedElement,
    operator.AppendLibraryElement,
    operator.AppendLibraryElementByQuery,
    operator.AssignLibraryDeclaration,
    operator.ChangeLibraryElement,
+    operator.CreateClippingPlane,
    operator.CreateProject,
+    operator.DisableCulling,
    operator.DisableEditingHeader,
    operator.EditHeader,
+    operator.EnableCulling,
    operator.EnableEditingHeader,
    operator.ExportIFC,
+    operator.FlipClippingPlane,
    operator.ImportIFC,
    operator.LinkIfc,
    operator.LoadLink,
+    operator.LoadLinkedProject,
    operator.LoadProject,
    operator.LoadProjectElements,
    operator.NewProject,
+    operator.QueryLinkedElement,
+    operator.RefreshClippingPlanes,
    operator.RefreshLibrary,
+    operator.ReloadLink,
    operator.RevertProject,
    operator.RewindLibrary,
    operator.SaveLibraryFile,
@@ -48,7 +57,7 @@ classes = (
    operator.UnlinkIfc,
    operator.UnloadLink,
    operator.UnloadProject,
-    operator.ReloadLink,
+    workspace.ExploreHotkey,
    prop.LibraryElement,
    prop.FilterCategory,
    prop.Link,
@@ -62,6 +71,7 @@ classes = (
    ui.BIM_UL_library,
    ui.BIM_UL_filter_categories,
    ui.BIM_UL_links,
+    gizmo.ClippingPlane,
 )


@@ -69,7 +79,10 @@ addon_keymaps = []


 def register():
+    if not bpy.app.background:
+        bpy.utils.register_tool(workspace.ExploreTool, after={"builtin.transform"}, separator=True, group=False)
    bpy.types.Scene.BIMProjectProperties = bpy.props.PointerProperty(type=prop.BIMProjectProperties)
+    bpy.app.handlers.load_post.append(decorator.toggle_decorations_on_load)
    bpy.types.TOPBAR_MT_file.prepend(ui.file_menu)
    bpy.types.TOPBAR_MT_file_context_menu.prepend(ui.file_menu)
    wm = bpy.context.window_manager
@@ -88,9 +101,12 @@ def register():


 def unregister():
+    if not bpy.app.background:
+        bpy.utils.unregister_tool(workspace.ExploreTool)
+    del bpy.types.Scene.BIMProjectProperties
+    bpy.app.handlers.load_post.remove(decorator.toggle_decorations_on_load)
    bpy.types.TOPBAR_MT_file.remove(ui.file_menu)
    bpy.types.TOPBAR_MT_file_context_menu.remove(ui.file_menu)
-    del bpy.types.Scene.BIMProjectProperties

    wm = bpy.context.window_manager
    kc = wm.keyconfigs.addon
@@ -24,6 +24,7 @@ from blenderbim.bim.ifc import IfcStore

 def refresh():
    ProjectData.is_loaded = False
+    LinksData.is_loaded = False


 class ProjectData:
@@ -34,6 +35,7 @@ class ProjectData:
    def load(cls):
        cls.data = {
            "export_schema": cls.get_export_schema(),
+            "library_file": cls.library_file(),
            "template_file": cls.template_file(),
            "last_saved": cls.last_saved(),
        }
@@ -44,10 +46,17 @@ class ProjectData:
        return [(s, s, "") for s in IfcStore.schema_identifiers]

    @classmethod
-    def template_file(cls):
+    def library_file(cls):
        files = os.listdir(os.path.join(bpy.context.scene.BIMProperties.data_dir, "libraries"))
+        results = [("0", "Custom Library", "")]
+        results.extend([(f, os.path.splitext(f)[0], "") for f in files if ".ifc" in f])
+        return results
+
+    @classmethod
+    def template_file(cls):
+        files = os.listdir(os.path.join(bpy.context.scene.BIMProperties.data_dir, "templates", "projects"))
        results = [("0", "Blank Project", "")]
-        results.extend([(f, f.replace(".ifc", ""), "") for f in files if ".ifc" in f])
+        results.extend([(f, os.path.splitext(f)[0], "") for f in files if ".ifc" in f])
        return results

    @classmethod
@@ -61,3 +70,9 @@ class ProjectData:
            return f"{save_date} {':'.join(save_time.split(':')[0:2])}"
        except:
            return ""
+
+
+class LinksData:
+    linked_data = {}
+    enable_culling = False
+    is_loaded = False
@@ -0,0 +1,203 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import gpu
+import bpy
+import bmesh
+import blenderbim.tool as tool
+from bpy.types import SpaceView3D
+from mathutils import Vector
+from gpu_extras.batch import batch_for_shader
+from bpy.app.handlers import persistent
+
+
+@persistent
+def toggle_decorations_on_load(*args):
+    if bpy.context.scene.BIMProjectProperties.clipping_planes:
+        ClippingPlaneDecorator.install(bpy.context)
+    else:
+        ClippingPlaneDecorator.uninstall()
+
+    # NOTE: ProjectDecorator cannot be loaded at reopening .blend file
+    # since selected_vertices and other data is stored in queried object's
+    # custom attributes and they get purged after Blender session is closed
+    # as queried object is linked from separate .blend file.
+
+
+class ProjectDecorator:
+    installed = None
+
+    @classmethod
+    def install(cls, context):
+        if cls.installed:
+            cls.uninstall()
+        handler = cls()
+        cls.installed = SpaceView3D.draw_handler_add(handler, (context,), "WINDOW", "POST_VIEW")
+
+    @classmethod
+    def uninstall(cls):
+        try:
+            SpaceView3D.draw_handler_remove(cls.installed, "WINDOW")
+        except ValueError:
+            pass
+        cls.installed = None
+
+    def draw_batch(self, shader_type, content_pos, color, indices=None):
+        shader = self.line_shader if shader_type == "LINES" else self.shader
+        batch = batch_for_shader(shader, shader_type, {"pos": content_pos}, indices=indices)
+        shader.uniform_float("color", color)
+        batch.draw(shader)
+
+    def __call__(self, context):
+        self.addon_prefs = context.preferences.addons["blenderbim"].preferences
+        selected_elements_color = self.addon_prefs.decorator_color_selected
+        unselected_elements_color = self.addon_prefs.decorator_color_unselected
+        special_elements_color = self.addon_prefs.decorator_color_special
+
+        def transparent_color(color, alpha=0.1):
+            color = [i for i in color]
+            color[3] = alpha
+            return color
+
+        gpu.state.point_size_set(6)
+        gpu.state.blend_set("ALPHA")
+
+        self.line_shader = gpu.shader.from_builtin("POLYLINE_UNIFORM_COLOR")
+        self.line_shader.bind()  # required to be able to change uniforms of the shader
+        # POLYLINE_UNIFORM_COLOR specific uniforms
+        self.line_shader.uniform_float("viewportSize", (context.region.width, context.region.height))
+        self.line_shader.uniform_float("lineWidth", 2.0)
+
+        # general shader
+        self.shader = gpu.shader.from_builtin("UNIFORM_COLOR")
+
+        selected_vertices = []
+        selected_edges = []
+        selected_tris = []
+
+        try:
+            obj = context.scene.BIMProjectProperties.queried_obj
+            selected_vertices = obj["selected_vertices"]
+            selected_edges = obj["selected_edges"]
+            selected_tris = obj["selected_tris"]
+        except:
+            return
+
+        if selected_edges:
+            self.draw_batch("LINES", selected_vertices, selected_elements_color, selected_edges)
+            self.draw_batch("TRIS", selected_vertices, transparent_color(selected_elements_color), selected_tris)
+
+
+class ClippingPlaneDecorator:
+    installed = None
+
+    @classmethod
+    def install(cls, context):
+        if cls.installed:
+            cls.uninstall()
+        handler = cls()
+        cls.installed = SpaceView3D.draw_handler_add(handler, (context,), "WINDOW", "POST_VIEW")
+
+    @classmethod
+    def uninstall(cls):
+        try:
+            SpaceView3D.draw_handler_remove(cls.installed, "WINDOW")
+        except ValueError:
+            pass
+        cls.installed = None
+
+    def draw_batch(self, shader_type, content_pos, color, indices=None):
+        shader = self.line_shader if shader_type == "LINES" else self.shader
+        batch = batch_for_shader(shader, shader_type, {"pos": content_pos}, indices=indices)
+        shader.uniform_float("color", color)
+        batch.draw(shader)
+
+    def __call__(self, context):
+        self.addon_prefs = context.preferences.addons["blenderbim"].preferences
+        selected_elements_color = self.addon_prefs.decorator_color_selected
+        unselected_elements_color = self.addon_prefs.decorator_color_unselected
+        special_elements_color = self.addon_prefs.decorator_color_special
+
+        def transparent_color(color, alpha=0.1):
+            color = [i for i in color]
+            color[3] = alpha
+            return color
+
+        gpu.state.point_size_set(6)
+        gpu.state.blend_set("ALPHA")
+
+        self.line_shader = gpu.shader.from_builtin("POLYLINE_UNIFORM_COLOR")
+        self.line_shader.bind()  # required to be able to change uniforms of the shader
+        # POLYLINE_UNIFORM_COLOR specific uniforms
+        self.line_shader.uniform_float("viewportSize", (context.region.width, context.region.height))
+        self.line_shader.uniform_float("lineWidth", 2.0)
+
+        # general shader
+        self.shader = gpu.shader.from_builtin("UNIFORM_COLOR")
+
+        selected_vertices = []
+        selected_edges = []
+        selected_tris = []
+        unselected_vertices = []
+        unselected_edges = []
+        unselected_tris = []
+
+        for clipping_plane in context.scene.BIMProjectProperties.clipping_planes:
+            obj = clipping_plane.obj
+            if not obj or not obj.data:
+                continue
+
+            if obj.mode == "EDIT":
+                continue  # A profile decorator or something else is used here.
+
+            bm = bmesh.new()
+            bm.from_mesh(obj.data)
+            obj.data.calc_loop_triangles()
+
+            if obj.select_get():
+                offset = len(selected_vertices)
+                selected_vertices.extend([tuple(obj.matrix_world @ v.co) for v in bm.verts])
+                selected_edges.extend([tuple([v.index + offset for v in e.verts]) for e in bm.edges])
+                selected_tris.extend([tuple([i + offset for i in t.vertices]) for t in obj.data.loop_triangles])
+            else:
+                offset = len(unselected_vertices)
+                unselected_vertices.extend([tuple(obj.matrix_world @ v.co) for v in bm.verts])
+                unselected_edges.extend([tuple([v.index + offset for v in e.verts]) for e in bm.edges])
+                unselected_tris.extend([tuple([i + offset for i in t.vertices]) for t in obj.data.loop_triangles])
+
+            verts = [
+                tuple(obj.matrix_world @ Vector((0, 0, 0))),
+                tuple(obj.matrix_world @ Vector((0, 0, -0.5))),
+                tuple(obj.matrix_world @ Vector((-0.05, 0, -0.45))),
+                tuple(obj.matrix_world @ Vector((0.05, 0, -0.45))),
+                tuple(obj.matrix_world @ Vector((0, -0.05, -0.45))),
+                tuple(obj.matrix_world @ Vector((0, 0.05, -0.45))),
+            ]
+            edges = [(0, 1), (1, 2), (1, 3), (1, 4), (1, 5)]
+            color = selected_elements_color if obj in context.selected_objects else special_elements_color
+            self.draw_batch("LINES", verts, color, edges)
+
+            if obj.mode != "EDIT":
+                bm.free()
+
+            if unselected_edges:
+                self.draw_batch("LINES", unselected_vertices, special_elements_color, unselected_edges)
+                self.draw_batch("TRIS", unselected_vertices, transparent_color(special_elements_color), unselected_tris)
+            if selected_edges:
+                self.draw_batch("LINES", selected_vertices, selected_elements_color, selected_edges)
+                self.draw_batch("TRIS", selected_vertices, transparent_color(selected_elements_color), selected_tris)
@@ -0,0 +1,68 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import bpy
+from bpy.types import GizmoGroup
+from mathutils import Matrix
+
+
+class ClippingPlane(GizmoGroup):
+    bl_idname = "OBJECT_GGT_bim_clipping_plane"
+    bl_label = "Clipping Plane"
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "WINDOW"
+    bl_options = {"3D", "PERSISTENT"}
+
+    @classmethod
+    def poll(cls, context):
+        obj = context.object
+        return (
+            context.selected_objects
+            and obj
+            and obj.name.startswith("ClippingPlane")
+            and obj in [sp.obj for sp in context.scene.BIMProjectProperties.clipping_planes]
+        )
+
+    def setup(self, context):
+        self.obj = None
+        self.offset = 0
+        self.mw = Matrix()
+        self.last_mw = Matrix()
+
+        self.gizmo = self.gizmos.new("GIZMO_GT_arrow_3d")
+
+        def move_get_x():
+            return self.offset
+
+        def move_set_x(value):
+            self.obj.matrix_world.col[3] = self.mw.col[3] + (self.mw.col[2] * self.offset)
+            self.last_mw = self.obj.matrix_world.copy()
+            self.offset = value
+
+        self.gizmo.target_set_handler("offset", get=move_get_x, set=move_set_x)
+
+    def refresh(self, context):
+        if self.obj != context.object or self.last_mw != context.object.matrix_world:
+            self.obj = context.object
+            self.offset = 0
+            self.mw = context.object.matrix_world.copy()
+        obj = context.object
+        mw = context.object.matrix_world.normalized()
+        mw.col[3] -= mw.col[2] * self.offset
+        self.gizmo.matrix_basis = mw
@@ -16,11 +16,12 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.

+import os
 import bpy
 import ifcopenshell.util.placement
 from blenderbim.bim.module.project.data import ProjectData
 from blenderbim.bim.ifc import IfcStore
-from blenderbim.bim.prop import StrProperty
+from blenderbim.bim.prop import StrProperty, ObjProperty
 from bpy.types import PropertyGroup
 from bpy.props import (
    PointerProperty,
@@ -45,6 +46,19 @@ def get_template_file(self, context):
    return ProjectData.data["template_file"]


+def get_library_file(self, context):
+    if not ProjectData.is_loaded:
+        ProjectData.load()
+    return ProjectData.data["library_file"]
+
+
+def update_library_file(self, context):
+    if self.library_file != "0":
+        bpy.ops.bim.select_library_file(
+            filepath=os.path.join(bpy.context.scene.BIMProperties.data_dir, "libraries", self.library_file)
+        )
+
+
 def update_filter_mode(self, context):
    self.filter_categories.clear()
    if self.filter_mode == "NONE":
@@ -169,7 +183,15 @@ class BIMProjectProperties(PropertyGroup):
    active_link_index: IntProperty(name="Active Link Index")
    export_schema: EnumProperty(items=get_export_schema, name="IFC Schema")
    template_file: EnumProperty(items=get_template_file, name="Template File")
+    library_file: EnumProperty(items=get_library_file, name="Library File", update=update_library_file)
    use_relative_project_path: BoolProperty(name="Use Relative Project Path", default=False)
+    queried_obj: bpy.props.PointerProperty(type=bpy.types.Object)
+    clipping_planes: bpy.props.CollectionProperty(type=ObjProperty)
+    clipping_planes_active: bpy.props.IntProperty(min=0, default=0, max=5)
+
+    @property
+    def clipping_planes_objs(self):
+        return list({cp.obj for cp in self.clipping_planes if cp.obj})

    def get_library_element_index(self, lib_element):
        return next((i for i in range(len(self.library_elements)) if self.library_elements[i] == lib_element))
@@ -21,7 +21,7 @@ import blenderbim.bim
 from blenderbim.bim.helper import prop_with_search
 from bpy.types import Panel, Menu, UIList
 from blenderbim.bim.ifc import IfcStore
-from blenderbim.bim.module.project.data import ProjectData
+from blenderbim.bim.module.project.data import ProjectData, LinksData


 class BIM_MT_project(Menu):
@@ -255,14 +255,21 @@ class BIM_PT_project_library(Panel):
        self.layout.use_property_split = True
        self.props = context.scene.BIMProjectProperties
        row = self.layout.row(align=True)
-        row.label(text=IfcStore.library_path or "No Library Loaded", icon="ASSET_MANAGER")
+        row.prop(self.props, "library_file", text="")
+        if self.props.library_file == "0":
+            row.operator("bim.select_library_file", icon="FILE_FOLDER", text="")
+        row = self.layout.row(align=True)
        if IfcStore.library_file:
-            row.label(text=IfcStore.library_file.schema)
+            row.label(
+                text=os.path.splitext(os.path.basename(IfcStore.library_path))[0]
+                + f" - {IfcStore.library_file.schema}",
+                icon="ASSET_MANAGER",
+            )
            row.operator("bim.append_library_element_by_query", text="", icon="APPEND_BLEND")
            row.operator("bim.save_library_file", text="", icon="EXPORT")
-        row.operator("bim.select_library_file", icon="FILE_FOLDER", text="")
-        if IfcStore.library_file:
            self.draw_library_ul()
+        else:
+            row.label(text="No Library Loaded", icon="ASSET_MANAGER")

    def draw_library_ul(self):
        if not self.props.library_elements:
@@ -307,6 +314,46 @@ class BIM_PT_links(Panel):
                "active_link_index",
            )

+        if LinksData.enable_culling:
+            row = self.layout.row(align=True)
+            row.label(text="Object Culling Enabled", icon="MOD_TRIANGULATE")
+
+        if not LinksData.linked_data or not self.props.links:
+            if self.props.links:
+                row = self.layout.row(align=True)
+                row.label(text="No Object Selected", icon="QUESTION")
+            return
+
+        row = self.layout.row(align=True)
+        row.label(text="")
+        row.operator("bim.append_inspected_linked_element", icon="APPEND_BLEND", text="")
+
+        for name, value in LinksData.linked_data["attributes"].items():
+            row = self.layout.row(align=True)
+            row.label(text=name)
+            row.label(text=value)
+
+        for pset in LinksData.linked_data["properties"]:
+            box = self.layout.box()
+            row = box.row(align=True)
+            row.label(text=pset[0], icon="COPY_ID")
+            for name, value in pset[1].items():
+                row = box.row(align=True)
+                row.label(text=name)
+                row.label(text=value)
+
+        if LinksData.linked_data["type_properties"]:
+            row = self.layout.row()
+            row.label(icon="LINKED", text="Type Properties")
+            for pset in LinksData.linked_data["type_properties"]:
+                box = self.layout.box()
+                row = box.row(align=True)
+                row.label(text=pset[0], icon="COPY_ID")
+                for name, value in pset[1].items():
+                    row = box.row(align=True)
+                    row.label(text=name)
+                    row.label(text=value)
+

 class BIM_UL_library(UIList):
    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
@@ -0,0 +1,90 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import bpy
+import blenderbim.tool as tool
+from bpy.types import WorkSpaceTool
+from blenderbim.bim.module.project.data import LinksData
+
+
+class ExploreTool(bpy.types.WorkSpaceTool):
+    bl_space_type = "VIEW_3D"
+    bl_context_mode = "OBJECT"
+    bl_idname = "bim.explore_tool"
+    bl_label = "Explore Tool"
+    bl_description = "Fetch data about a linked IFC element"
+    bl_icon = os.path.join(os.path.dirname(__file__), "ops.authoring.explore")
+    bl_widget = None
+    bl_keymap = (
+        ("bim.query_linked_element", {"type": "RIGHTMOUSE", "value": "PRESS"}, None),
+        ("bim.explore_hotkey", {"type": "W", "value": "PRESS", "shift": True}, {"properties": [("hotkey", "S_W")]}),
+        ("bim.explore_hotkey", {"type": "C", "value": "PRESS", "shift": True}, {"properties": [("hotkey", "S_C")]}),
+        ("bim.explore_hotkey", {"type": "F", "value": "PRESS", "shift": True}, {"properties": [("hotkey", "S_F")]}),
+        ("bim.explore_hotkey", {"type": "C", "value": "PRESS", "alt": True}, {"properties": [("hotkey", "A_C")]}),
+    )
+
+    def draw_settings(context, layout, ws_tool):
+        row = layout.row(align=True)
+        row.label(text="Query Object", icon="MOUSE_RMB")
+        row = layout.row(align=True)
+        row.label(text="", icon="EVENT_SHIFT")
+        row.label(text="Walk Mode", icon="EVENT_W")
+        row = layout.row(align=True)
+        row.label(text="", icon="EVENT_SHIFT")
+        row.label(text="Add Clipping Plane", icon="EVENT_C")
+        row = layout.row(align=True)
+        row.label(text="", icon="EVENT_SHIFT")
+        row.label(text="Flip Clipping Plane", icon="EVENT_F")
+        row = layout.row(align=True)
+        row.label(text="", icon="EVENT_ALT")
+        row.label(text="Set Orbit Center", icon="MOUSE_MMB")
+        row = layout.row(align=True)
+        row.label(text="", icon="EVENT_ALT")
+        row.label(text="Disable Culling" if LinksData.enable_culling else "Enable Culling", icon="EVENT_C")
+
+
+class ExploreHotkey(bpy.types.Operator):
+    bl_idname = "bim.explore_hotkey"
+    bl_label = "Explore Hotkey"
+    bl_options = {"REGISTER", "UNDO"}
+    hotkey: bpy.props.StringProperty()
+    description: bpy.props.StringProperty()
+
+    @classmethod
+    def description(cls, context, operator):
+        return operator.description or ""
+
+    def execute(self, context):
+        getattr(self, f"hotkey_{self.hotkey}")()
+        return {"FINISHED"}
+
+    def hotkey_S_W(self):
+        bpy.ops.view3d.walk("INVOKE_DEFAULT")
+
+    def hotkey_S_C(self):
+        bpy.ops.bim.create_clipping_plane("INVOKE_DEFAULT")
+
+    def hotkey_S_F(self):
+        bpy.ops.bim.flip_clipping_plane("INVOKE_DEFAULT")
+
+    def hotkey_A_C(self):
+        if LinksData.enable_culling:
+            bpy.ops.bim.disable_culling()
+        else:
+            bpy.ops.bim.enable_culling("INVOKE_DEFAULT")
@@ -80,10 +80,10 @@ class ObjectPsetsData(Data):
    def inherited_psets(cls):
        element = tool.Ifc.get_entity(bpy.context.active_object)
        if element.is_a("IfcTypeObject"):
-            return
+            return []
        element_type = ifcopenshell.util.element.get_type(element)
        if element_type:
-            return cls.psetqtos(element_type)
+            return cls.psetqtos(element_type, psets_only=True)

    @classmethod
    def pset_name(cls):
@@ -125,9 +125,21 @@ class ObjectQtosData(Data):

    @classmethod
    def load(cls):
-        cls.data = {"qtos": cls.psetqtos(tool.Ifc.get_entity(bpy.context.active_object), qtos_only=True)}
+        cls.data = {
+            "qtos": cls.psetqtos(tool.Ifc.get_entity(bpy.context.active_object), qtos_only=True),
+            "inherited_qsets": cls.inherited_qsets(),
+        }
        cls.is_loaded = True

+    @classmethod
+    def inherited_qsets(cls):
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        if element.is_a("IfcTypeObject"):
+            return []
+        element_type = ifcopenshell.util.element.get_type(element)
+        if element_type:
+            return cls.psetqtos(element_type, qtos_only=True)
+

 class MaterialPsetsData(Data):
    data = {}
@@ -85,7 +85,6 @@ class EnablePsetEditing(bpy.types.Operator):
    def execute(self, context):
        self.props = get_pset_props(context, self.obj, self.obj_type)
        self.props.properties.clear()
-        ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, self.obj, self.obj_type)

        if self.pset_id:
            pset = tool.Ifc.get().by_id(self.pset_id)
@@ -250,7 +249,7 @@ class DisablePsetEditing(bpy.types.Operator, Operator):
        props = get_pset_props(context, self.obj, self.obj_type)
        if props.active_pset_id:
            pset = tool.Ifc.get().by_id(props.active_pset_id)
-            ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, self.obj, self.obj_type)
+            ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(self.obj, self.obj_type, context)
            if tool.Pset.is_pset_empty(pset):
                ifcopenshell.api.run(
                    "pset.remove_pset", tool.Ifc.get(), product=tool.Ifc.get().by_id(ifc_definition_id), pset=pset
@@ -272,7 +271,7 @@ class EditPset(bpy.types.Operator, Operator):
    def _execute(self, context):
        self.file = IfcStore.get_file()
        props = get_pset_props(context, self.obj, self.obj_type)
-        ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, self.obj, self.obj_type)
+        ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(self.obj, self.obj_type, context)
        element = tool.Ifc.get().by_id(ifc_definition_id)
        properties = {}

@@ -343,7 +342,7 @@ class RemovePset(bpy.types.Operator, Operator):
        pset_name = tool.Ifc.get().by_id(self.pset_id).Name
        for obj in objects:
            props = get_pset_props(context, obj, self.obj_type)
-            ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, obj, self.obj_type)
+            ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(obj, self.obj_type, context)
            element = tool.Ifc.get().by_id(ifc_definition_id)
            pset = ifcopenshell.util.element.get_psets(element, should_inherit=False).get(pset_name, None)
            if pset:
@@ -374,7 +373,7 @@ class AddQto(bpy.types.Operator, Operator):
    def _execute(self, context):
        self.file = IfcStore.get_file()
        props = get_pset_props(context, self.obj, self.obj_type)
-        ifc_definition_id = blenderbim.bim.helper.get_obj_ifc_definition_id(context, self.obj, self.obj_type)
+        ifc_definition_id = tool.Blender.get_obj_ifc_definition_id(self.obj, self.obj_type, context)
        element = tool.Ifc.get().by_id(ifc_definition_id)
        bpy.ops.bim.enable_pset_editing(
            pset_id=0, pset_name=props.qto_name, pset_type="QTO", obj=self.obj, obj_type=self.obj_type
--- a/Show More
+++ b/Show More