fix: ifcclash bcfxml export

src/bcf/requirements-dev.txt

@@ -3,5 +3,5 @@ mypy
 pylint
 isort
 xsdata
-tox
+tox==3.27.1
 tox-conda

src/bcf/src/bcf/geometry.py

@@ -1,8 +1,10 @@
+from typing import Optional
+
 import numpy as np
 from numpy.typing import NDArray
 
 
-def calc_camera_vectors(
+def camera_vectors_from_element_placement(
     elem_placement: NDArray[np.float_],
 ) -> tuple[NDArray[np.float_], NDArray[np.float_], NDArray[np.float_]]:
     """
@@ -15,19 +17,37 @@ def calc_camera_vectors(
         Camera position, direction and up vectors
     """
     target_position = elem_placement[:3, 3]
-    camera_position = target_position + np.array((5, 5, 5))
+    return camera_vectors_from_target_position(target_position)
-    camera_direction = unit_vector(camera_position - target_position)
+
+
+def camera_vectors_from_target_position(
+    target_position: NDArray[np.float_], offset: Optional[NDArray[np.float_]] = None
+) -> tuple[NDArray[np.float_], NDArray[np.float_], NDArray[np.float_]]:
+    """
+    Calculate the vectors of a camera pointing to a target point.
+
+    Args:
+        target_position: point the camera is pointing to.
+        camera_offset: offset of the camera from the target point.
+
+    Returns:
+        Camera position, direction and up vectors
+    """
+    camera_offset = np.array((5, 5, 5)) if offset is None else offset
+    camera_position = target_position + camera_offset
+    camera_direction = unit_vector(-camera_offset)  # pylint: disable=invalid-unary-operand-type
     camera_right = unit_vector(np.cross(np.array([0.0, 0.0, 1.0]), camera_direction))
     camera_up = unit_vector(np.cross(camera_direction, camera_right))
-    rotation_transform = np.eye(4)
+    return camera_position, camera_direction, camera_up
-    rotation_transform[0, :3] = camera_right
+    # rotation_transform = np.eye(4)
-    rotation_transform[1, :3] = camera_up
+    # rotation_transform[0, :3] = camera_right
-    rotation_transform[2, :3] = camera_direction
+    # rotation_transform[1, :3] = camera_up
-    translation_transform = np.eye(4)
+    # rotation_transform[2, :3] = camera_direction
-    translation_transform[:3, -1] = -camera_position
+    # translation_transform = np.eye(4)
-    look_at_transform = np.matmul(rotation_transform, translation_transform)
+    # translation_transform[:3, -1] = -camera_position
-    mat = np.linalg.inv(look_at_transform)
+    # look_at_transform = np.matmul(rotation_transform, translation_transform)
-    return camera_position, -mat[:3, 2], mat[:3, 1]
+    # mat = np.linalg.inv(look_at_transform)
+    # return camera_position, -mat[:3, 2], mat[:3, 1]
 
 
 def unit_vector(v: NDArray[np.float_]) -> NDArray[np.float_]:

src/bcf/src/bcf/v2/bcfxml.py

@@ -3,7 +3,7 @@ import uuid
 import warnings
 import zipfile
 from pathlib import Path
-from typing import Any, Optional, TypeVar
+from typing import Any, NoReturn, Optional, TypeVar
 
 import bcf.v2.model as mdl
 from bcf.inmemory_zipfile import InMemoryZipFile, ZipFileInterface
@@ -50,7 +50,7 @@ class BcfXml:
             self._version = (
                 self._xml_handler.parse(self._zip_file.read("bcf.version"), mdl.Version)
                 if self._zip_file
-                else mdl.Version(version_id="3.0")
+                else mdl.Version(version_id="2.1")
             )
         return self._version
 
@@ -210,10 +210,12 @@ class BcfXml:
         self.topics[topic_handler.guid] = topic_handler
         return topic_handler
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: object) -> bool | NoReturn:
-        if not isinstance(other, BcfXml):
+        return (
-            raise TypeError("Equality needs a BcfXml object.")
+            self.version == other.version and self.project_info == other.project_info
-        return self.version == other.version and self.project_info == other.project_info
+            if isinstance(other, BcfXml)
+            else NotImplemented
+        )
 
     # region Deprecated methods
     def new_project(self) -> "BcfXml":

src/bcf/src/bcf/v2/topic.py

@@ -3,9 +3,11 @@ import datetime
 import uuid
 import zipfile
 from pathlib import Path
-from typing import Any, Optional
+from typing import Any, NoReturn, Optional
 
+import numpy as np
 from ifcopenshell import entity_instance
+from numpy.typing import NDArray
 from xsdata.models.datatype import XmlDateTime
 
 import bcf.v2.model as mdl
@@ -226,15 +228,29 @@ class TopicHandler:
         new_viewpoint = VisualizationInfoHandler.create_new(element, self._xml_handler)
         self.add_visinfo_handler(new_viewpoint)
 
+    def add_viewpoint_from_point_and_guids(self, position: NDArray[np.float_], *guids: str) -> None:
+        """
+        Add a viewpoint tergeting an IFC element to the topic.
+
+        Args:
+            element: The IFC element.
+        """
+        vi_handler = VisualizationInfoHandler.create_from_point_and_guids(
+            position, *guids, xml_handler=self._xml_handler
+        )
+        self.add_visinfo_handler(vi_handler)
+
     def add_visinfo_handler(self, new_viewpoint: VisualizationInfoHandler) -> None:
         self.viewpoints[new_viewpoint.guid] = new_viewpoint
         self.markup.viewpoints.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid, guid=new_viewpoint.guid))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: object) -> bool | NoReturn:
-        if not isinstance(other, TopicHandler):
-            raise TypeError("Equality needs a BcfXml object.")
         return (
-            self.markup == other.markup
+            (
-            and self.viewpoints == other.viewpoints
+                self.markup == other.markup
-            and self.bim_snippet == other.bim_snippet
+                and self.viewpoints == other.viewpoints
+                and self.bim_snippet == other.bim_snippet
+            )
+            if isinstance(other, TopicHandler)
+            else NotImplemented
         )

src/bcf/src/bcf/v2/visinfo.py

@@ -9,7 +9,10 @@ from ifcopenshell.util import placement
 from numpy.typing import NDArray
 
 import bcf.v2.model as mdl
-from bcf.geometry import calc_camera_vectors
+from bcf.geometry import (
+    camera_vectors_from_element_placement,
+    camera_vectors_from_target_position,
+)
 from bcf.inmemory_zipfile import ZipFileInterface
 from bcf.xml_parser import AbstractXmlParserSerializer, XmlParserSerializer
 
@@ -169,6 +172,29 @@ class VisualizationInfoHandler:
         xml_handler = xml_handler or XmlParserSerializer()
         return cls(visualization_info=build_viewpoint(element), xml_handler=xml_handler)
 
+    @classmethod
+    def create_from_point_and_guids(
+        cls,
+        position: NDArray[np.float_],
+        *guids: str,
+        xml_handler: Optional[AbstractXmlParserSerializer] = None,
+    ) -> "VisualizationInfoHandler":
+        """
+        Create a new VisualizationInfoHandler object from an IFC element.
+
+        Args:
+            position: target point coordinates.
+            *guids: One or more IFC element GUID.
+            xml_handler: The XML handler to use.
+
+        Returns:
+            The VisualizationInfoHandler object.
+        """
+        xml_handler = xml_handler or XmlParserSerializer()
+        return cls(
+            visualization_info=build_viewpoint_from_position_and_guids(position, *guids), xml_handler=xml_handler
+        )
+
 
 @lru_cache(maxsize=None)
 def build_viewpoint(element: entity_instance) -> mdl.VisualizationInfo:
@@ -192,18 +218,39 @@ def build_viewpoint(element: entity_instance) -> mdl.VisualizationInfo:
     )
 
 
-def build_components(guid: str) -> mdl.Components:
+def build_viewpoint_from_position_and_guids(position: NDArray[np.float_], *guids: str) -> mdl.VisualizationInfo:
+    """
+    Return a BCF viewpoint of an IFC element.
+
+    This function is cached to speedudp the creation of multiple BCF topics regarding the same element.
+
+    Args:
+        position: target point coordinates.
+        *guids: One or more IFC element GUID.
+
+    Returns:
+        The BCF viewpoint definition.
+    """
+    return mdl.VisualizationInfo(
+        guid=str(uuid.uuid4()),
+        components=build_components(*guids),
+        perspective_camera=build_camera_from_vectors(*camera_vectors_from_target_position(position)),
+    )
+
+
+def build_components(*guids: str) -> mdl.Components:
     """
     Return the BCF components from an IFC element GUID.
 
     Args:
-        guid: The IFC element GUID.
+        *guids: One or more IFC element GUID.
 
     Returns:
         The BCF components definition.
     """
+    components = [mdl.Component(ifc_guid=guid) for guid in guids]
     return mdl.Components(
-        selection=mdl.ComponentSelection(component=[mdl.Component(ifc_guid=guid)]),
+        selection=mdl.ComponentSelection(component=components),
         visibility=mdl.ComponentVisibility(default_visibility=True),
     )
 
@@ -218,7 +265,7 @@ def build_camera(elem_placement: NDArray[np.float_]) -> mdl.PerspectiveCamera:
     Returns:
         The BCF camera definition.
     """
-    return build_camera_from_vectors(*calc_camera_vectors(elem_placement))
+    return build_camera_from_vectors(*camera_vectors_from_element_placement(elem_placement))
 
 
 def build_camera_from_vectors(

src/bcf/src/bcf/v3/bcfxml.py

@@ -3,7 +3,7 @@ import uuid
 import warnings
 import zipfile
 from pathlib import Path
-from typing import Any, Optional, TypeVar
+from typing import Any, NoReturn, Optional, TypeVar
 
 import bcf.v3.model as mdl
 from bcf.inmemory_zipfile import InMemoryZipFile, ZipFileInterface
@@ -224,13 +224,13 @@ class BcfXml:
         self.topics[topic_handler.guid] = topic_handler
         return topic_handler
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: object) -> bool | NoReturn:
-        if not isinstance(other, BcfXml):
-            raise TypeError("Equality needs a BcfXml object.")
         return (
             self.version == other.version
             and self.project_info == other.project_info
             and self.extensions == other.extensions
+            if isinstance(other, BcfXml)
+            else NotImplemented
         )
 
     # region Deprecated methods

src/bcf/src/bcf/v3/topic.py

@@ -3,9 +3,11 @@ import datetime
 import uuid
 import zipfile
 from pathlib import Path
-from typing import Any, Optional
+from typing import Any, NoReturn, Optional
 
+import numpy as np
 from ifcopenshell import entity_instance
+from numpy.typing import NDArray
 from xsdata.models.datatype import XmlDateTime
 
 import bcf.v3.model as mdl
@@ -73,7 +75,7 @@ class TopicHandler:
         self._bim_snippet = value
 
     @property
-    def viewpoints(self) -> Optional[VisualizationInfoHandler]:
+    def viewpoints(self) -> dict[str, "VisualizationInfoHandler"]:
         if (
             not self._viewpoints
             and self._topic_dir
@@ -143,7 +145,7 @@ class TopicHandler:
         self._save_viewpoints(destination_zip, topic_dir)
         self._save_bim_snippet(destination_zip)
 
-    def _save_viewpoints(self, destination_zip, topic_dir) -> None:
+    def _save_viewpoints(self, destination_zip: ZipFileInterface, topic_dir: str) -> None:
         if not self.topic.viewpoints or not (viewpoints := self.topic.viewpoints.view_point):
             return
         for vpt in viewpoints:
@@ -172,17 +174,31 @@ class TopicHandler:
         new_viewpoint = VisualizationInfoHandler.create_new(element, self._xml_handler)
         self.add_visinfo_handler(new_viewpoint)
 
+    def add_viewpoint_from_point_and_guids(self, position: NDArray[np.float_], *guids: str) -> None:
+        """
+        Add a viewpoint tergeting an IFC element to the topic.
+
+        Args:
+            element: The IFC element.
+        """
+        vi_handler = VisualizationInfoHandler.create_from_point_and_guids(
+            position, *guids, xml_handler=self._xml_handler
+        )
+        self.add_visinfo_handler(vi_handler)
+
     def add_visinfo_handler(self, new_viewpoint: VisualizationInfoHandler) -> None:
         self.viewpoints[new_viewpoint.guid] = new_viewpoint
         if self.topic.viewpoints is None:
             self.topic.viewpoints = mdl.TopicViewpoints()
         self.topic.viewpoints.view_point.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid, guid=new_viewpoint.guid))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: object) -> bool | NoReturn:
-        if not isinstance(other, TopicHandler):
-            raise TypeError("Equality needs a BcfXml object.")
         return (
-            self.markup == other.markup
+            (
-            and self.viewpoints == other.viewpoints
+                self.markup == other.markup
-            and self.bim_snippet == other.bim_snippet
+                and self.viewpoints == other.viewpoints
+                and self.bim_snippet == other.bim_snippet
+            )
+            if isinstance(other, TopicHandler)
+            else NotImplemented
         )

src/bcf/src/bcf/v3/visinfo.py

@@ -9,7 +9,10 @@ from ifcopenshell.util import placement
 from numpy.typing import NDArray
 
 import bcf.v3.model as mdl
-from bcf.geometry import calc_camera_vectors
+from bcf.geometry import (
+    camera_vectors_from_element_placement,
+    camera_vectors_from_target_position,
+)
 from bcf.inmemory_zipfile import ZipFileInterface
 from bcf.xml_parser import AbstractXmlParserSerializer, XmlParserSerializer
 
@@ -169,6 +172,29 @@ class VisualizationInfoHandler:
         xml_handler = xml_handler or XmlParserSerializer()
         return cls(visualization_info=build_viewpoint(element), xml_handler=xml_handler)
 
+    @classmethod
+    def create_from_point_and_guids(
+        cls,
+        position: NDArray[np.float_],
+        *guids: str,
+        xml_handler: Optional[AbstractXmlParserSerializer] = None,
+    ) -> "VisualizationInfoHandler":
+        """
+        Create a new VisualizationInfoHandler object from an IFC element.
+
+        Args:
+            position: target point coordinates.
+            *guids: One or more IFC element GUID.
+            xml_handler: The XML handler to use.
+
+        Returns:
+            The VisualizationInfoHandler object.
+        """
+        xml_handler = xml_handler or XmlParserSerializer()
+        return cls(
+            visualization_info=build_viewpoint_from_position_and_guids(position, *guids), xml_handler=xml_handler
+        )
+
 
 @lru_cache(maxsize=None)
 def build_viewpoint(element: entity_instance) -> mdl.VisualizationInfo:
@@ -192,18 +218,39 @@ def build_viewpoint(element: entity_instance) -> mdl.VisualizationInfo:
     )
 
 
-def build_components(guid: str) -> mdl.Components:
+def build_viewpoint_from_position_and_guids(position: NDArray[np.float_], *guids: str) -> mdl.VisualizationInfo:
+    """
+    Return a BCF viewpoint of an IFC element.
+
+    This function is cached to speedudp the creation of multiple BCF topics regarding the same element.
+
+    Args:
+        position: target point coordinates.
+        *guids: One or more IFC element GUID.
+
+    Returns:
+        The BCF viewpoint definition.
+    """
+    return mdl.VisualizationInfo(
+        guid=str(uuid.uuid4()),
+        components=build_components(*guids),
+        perspective_camera=build_camera_from_vectors(*camera_vectors_from_target_position(position)),
+    )
+
+
+def build_components(*guids: str) -> mdl.Components:
     """
     Return the BCF components from an IFC element GUID.
 
     Args:
-        guid: The IFC element GUID.
+        *guids: One or more IFC element GUID.
 
     Returns:
         The BCF components definition.
     """
+    components = [mdl.Component(ifc_guid=guid) for guid in guids]
     return mdl.Components(
-        selection=mdl.ComponentSelection(component=[mdl.Component(ifc_guid=guid)]),
+        selection=mdl.ComponentSelection(component=components),
         visibility=mdl.ComponentVisibility(default_visibility=True),
     )
 
@@ -218,7 +265,7 @@ def build_camera(elem_placement: NDArray[np.float_]) -> mdl.PerspectiveCamera:
     Returns:
         The BCF camera definition.
     """
-    return build_camera_from_vectors(*calc_camera_vectors(elem_placement))
+    return build_camera_from_vectors(*camera_vectors_from_element_placement(elem_placement))
 
 
 def build_camera_from_vectors(

src/bcf/tests/v2/test_bcf_xml.py

@@ -47,12 +47,16 @@ def test_bcf_edit_saveas(xml_handler, build_sample) -> None:
             modified_path = Path(tmp_dir) / "edited.bcf"
             parsed.save(modified_path)
             with BcfXml.load(modified_path, xml_handler=xml_handler) as modified_parsed:
-                assert modified_parsed == bcf
+                _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed)
-                parsed_th = modified_parsed.topics[orig_th.guid]
+
-                assert parsed_th.markup != orig_th.markup
+
-                assert parsed_th.markup == parsed.topics[orig_th.guid].markup
+def _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed):
-                assert parsed_th.viewpoints == orig_th.viewpoints
+    assert modified_parsed == bcf
-                assert parsed_th.bim_snippet == orig_th.bim_snippet
+    parsed_th = modified_parsed.topics[orig_th.guid]
+    assert parsed_th.markup != orig_th.markup
+    assert parsed_th.markup == parsed.topics[orig_th.guid].markup
+    assert parsed_th.viewpoints == orig_th.viewpoints
+    assert parsed_th.bim_snippet == orig_th.bim_snippet
 
 
 def test_bcf_edit(xml_handler, build_sample) -> None:
@@ -66,13 +70,8 @@ def test_bcf_edit(xml_handler, build_sample) -> None:
                 th.topic.title = "New Topic Title"
             parsed.save()
             with BcfXml.load(file_path, xml_handler=xml_handler) as modified_parsed:
-                assert modified_parsed == bcf
+                _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed)
                 assert len(modified_parsed.topics) == 1
-                parsed_th = modified_parsed.topics[orig_th.guid]
-                assert parsed_th.markup != orig_th.markup
-                assert parsed_th.markup == parsed.topics[orig_th.guid].markup
-                assert parsed_th.viewpoints == orig_th.viewpoints
-                assert parsed_th.bim_snippet == orig_th.bim_snippet
 
 
 def test_save_no_filename(build_sample) -> None:
@@ -112,11 +111,16 @@ def test_massive_bcf(xml_handler) -> None:
         bcf.save(file_path)
 
 
-def test_equality_with_wrong_object() -> None:
+def test_equality_with_wrong_object(build_sample) -> None:
-    with pytest.raises(TypeError):
+    assert build_sample[0] != "Wrong object"
-        build_sample[0] == "Wrong object"
 
 
-def test_topic_equality_with_wrong_object() -> None:
+def test_topic_equality_with_wrong_object(build_sample) -> None:
-    with pytest.raises(TypeError):
+    assert build_sample[1] != "Wrong object"
-        build_sample[1] == "Wrong object"
+
+
+def test_bcf_get_set_version(build_sample) -> None:
+    bcf = build_sample[0]
+    assert bcf.version.version_id == "2.1"
+    bcf.version.version_id = "2.0"
+    assert bcf.version.version_id == "2.0"

src/bcf/tests/v2/test_ifcclash_api.py

@@ -0,0 +1,36 @@
+import numpy as np
+import pytest
+
+from bcf.v2.bcfxml import BcfXml
+
+
+def test_create_clash_set_bcf() -> None:
+    bcfxml = BcfXml.create_new("Clash Test")
+    topic = bcfxml.add_topic("Test", "Test topic", "IfcClash")
+    topic.add_viewpoint_from_point_and_guids(
+        np.array([10, 10, 10]),
+        "firstId",
+        "secondId",
+    )
+    assert len(topic.viewpoints) == 1
+    guid, vi_handler = next((k, v) for k, v in topic.viewpoints.items())
+    v_info = vi_handler.visualization_info
+    assert v_info.guid == guid
+    components = v_info.components.selection.component
+    assert {c.ifc_guid for c in components} == {"firstId", "secondId"}
+    camera = v_info.perspective_camera
+    viewpoint = camera.camera_view_point
+    assert viewpoint.x == 15
+    assert viewpoint.y == 15
+    assert viewpoint.z == 15
+    # default direction is the unit vector of -1, -1, -1
+    direction = camera.camera_direction
+    assert direction.x == pytest.approx(-1 / 3**0.5)
+    assert direction.y == pytest.approx(-1 / 3**0.5)
+    assert direction.z == pytest.approx(-1 / 3**0.5)
+    # default
+    up_vector = camera.camera_up_vector
+    assert up_vector.x == pytest.approx(-1 / 6**0.5)
+    assert up_vector.y == pytest.approx(-1 / 6**0.5)
+    assert up_vector.z == pytest.approx(1 / 1.5**0.5)
+    assert camera.field_of_view == 60

src/bcf/tests/v3/test_bcf_xml.py

@@ -48,12 +48,16 @@ def test_bcf_edit_saveas(xml_handler, build_sample) -> None:
             modified_path = Path(tmp_dir) / "edited.bcf"
             parsed.save(modified_path)
             with BcfXml.load(modified_path, xml_handler=xml_handler) as modified_parsed:
-                assert modified_parsed == bcf
+                _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed)
-                parsed_th = modified_parsed.topics[orig_th.guid]
+
-                assert parsed_th.markup != orig_th.markup
+
-                assert parsed_th.markup == parsed.topics[orig_th.guid].markup
+def _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed):
-                assert parsed_th.viewpoints == orig_th.viewpoints
+    assert modified_parsed == bcf
-                assert parsed_th.bim_snippet == orig_th.bim_snippet
+    parsed_th = modified_parsed.topics[orig_th.guid]
+    assert parsed_th.markup != orig_th.markup
+    assert parsed_th.markup == parsed.topics[orig_th.guid].markup
+    assert parsed_th.viewpoints == orig_th.viewpoints
+    assert parsed_th.bim_snippet == orig_th.bim_snippet
 
 
 def test_bcf_edit(xml_handler, build_sample) -> None:
@@ -67,13 +71,8 @@ def test_bcf_edit(xml_handler, build_sample) -> None:
                 th.topic.title = "New Topic Title"
             parsed.save()
             with BcfXml.load(file_path, xml_handler=xml_handler) as modified_parsed:
-                assert modified_parsed == bcf
+                _assert_modified_parsed(modified_parsed, bcf, orig_th, parsed)
                 assert len(modified_parsed.topics) == 1
-                parsed_th = modified_parsed.topics[orig_th.guid]
-                assert parsed_th.markup != orig_th.markup
-                assert parsed_th.markup == parsed.topics[orig_th.guid].markup
-                assert parsed_th.viewpoints == orig_th.viewpoints
-                assert parsed_th.bim_snippet == orig_th.bim_snippet
 
 
 def test_save_no_filename(build_sample) -> None:
@@ -88,7 +87,7 @@ def test_load_no_filename() -> None:
 
 
 def test_save_keep_open(build_sample) -> None:
-    bcf, orig_th = build_sample
+    bcf, _ = build_sample
     with TemporaryDirectory() as tmp_dir:
         file_path = Path(tmp_dir) / "test.bcf"
         bcf.save(file_path, keep_open=True)
@@ -96,11 +95,6 @@ def test_save_keep_open(build_sample) -> None:
         bcf._zip_file.close()
 
 
-# image = PIL.Image.new('RGB', size=(100, 100))
-# file = BinaryIO()
-# image.save(file)
-
-
 def test_massive_bcf(xml_handler) -> None:
     ext = mdl.Extensions(topic_types=mdl.ExtensionsTopicTypes(topic_type=["Test type"]))
     bcf = BcfXml.create_new("Test project", extensions=ext, xml_handler=xml_handler)
@@ -119,11 +113,9 @@ def test_massive_bcf(xml_handler) -> None:
         bcf.save(file_path)
 
 
-def test_equality_with_wrong_object() -> None:
+def test_equality_with_wrong_object(build_sample) -> None:
-    with pytest.raises(TypeError):
+    assert build_sample[0] != "Wrong object"
-        build_sample[0] == "Wrong object"
 
 
-def test_topic_equality_with_wrong_object() -> None:
+def test_topic_equality_with_wrong_object(build_sample) -> None:
-    with pytest.raises(TypeError):
+    assert build_sample[1] != "Wrong object"
-        build_sample[1] == "Wrong object"

src/bcf/tests/v3/test_ifcclash_api.py

@@ -0,0 +1,36 @@
+import numpy as np
+import pytest
+
+from bcf.v3.bcfxml import BcfXml
+
+
+def test_create_clash_set_bcf() -> None:
+    bcfxml = BcfXml.create_new("Clash Test")
+    topic = bcfxml.add_topic("Test", "Test topic", "IfcClash")
+    topic.add_viewpoint_from_point_and_guids(
+        np.array([10, 10, 10]),
+        "firstId",
+        "secondId",
+    )
+    assert len(topic.viewpoints) == 1
+    guid, vi_handler = next((k, v) for k, v in topic.viewpoints.items())
+    v_info = vi_handler.visualization_info
+    assert v_info.guid == guid
+    components = v_info.components.selection.component
+    assert {c.ifc_guid for c in components} == {"firstId", "secondId"}
+    camera = v_info.perspective_camera
+    viewpoint = camera.camera_view_point
+    assert viewpoint.x == 15
+    assert viewpoint.y == 15
+    assert viewpoint.z == 15
+    # default direction is the unit vector of -1, -1, -1
+    direction = camera.camera_direction
+    assert direction.x == pytest.approx(-1 / 3**0.5)
+    assert direction.y == pytest.approx(-1 / 3**0.5)
+    assert direction.z == pytest.approx(-1 / 3**0.5)
+    # default
+    up_vector = camera.camera_up_vector
+    assert up_vector.x == pytest.approx(-1 / 6**0.5)
+    assert up_vector.y == pytest.approx(-1 / 6**0.5)
+    assert up_vector.z == pytest.approx(1 / 1.5**0.5)
+    assert camera.field_of_view == 60

src/ifcclash/ifcclash/ifcclash.py

@@ -22,8 +22,6 @@
 import numpy as np
 import json
 import sys
-import argparse
-import logging
 import multiprocessing
 import ifcopenshell
 import ifcopenshell.geom
@@ -117,71 +115,22 @@ class Clasher:
         self.export_json()
 
     def export_bcfxml(self):
-        import bcf
+        from bcf.v2.bcfxml import BcfXml
-        import bcf.v2.bcfxml
 
         for i, clash_set in enumerate(self.clash_sets):
-            bcfxml = bcf.v2.bcfxml.BcfXml()
+            bcfxml = BcfXml.create_new(clash_set["name"])
-            bcfxml.new_project()
+            for clash in clash_set["clashes"].values():
-            bcfxml.project.name = clash_set["name"]
+                title = f'{clash["a_ifc_class"]}/{clash["a_name"]} and {clash["b_ifc_class"]}/{clash["b_name"]}'
-            bcfxml.edit_project()
+                topic = bcfxml.add_topic(title, title, "IfcClash")
-            for key, clash in clash_set["clashes"].items():
+                topic.add_viewpoint_from_point_and_guids(
-                topic = bcf.v2.data.Topic()
+                    np.array(clash["position"]), clash["a_global_id"], clash["b_global_id"],
-                topic.title = "{}/{} and {}/{}".format(
-                    clash["a_ifc_class"], clash["a_name"], clash["b_ifc_class"], clash["b_name"]
                 )
-                topic = bcfxml.add_topic(topic)
+            suffix = f".{i}" if i else ""
-                viewpoint = bcf.v2.data.Viewpoint()
+            bcfxml.save_project(f"{self.settings.output}{suffix}")
-                viewpoint.perspective_camera = bcf.v2.data.PerspectiveCamera()
-                position = np.array(clash["position"])
-                point = position + np.array((5, 5, 5))  # Dumb, but works (for now)!
-                viewpoint.perspective_camera.camera_view_point.x = point[0]
-                viewpoint.perspective_camera.camera_view_point.y = point[1]
-                viewpoint.perspective_camera.camera_view_point.z = point[2]
-                mat = self.get_track_to_matrix(point, position)
-                viewpoint.perspective_camera.camera_direction.x = mat[0][2] * -1
-                viewpoint.perspective_camera.camera_direction.y = mat[1][2] * -1
-                viewpoint.perspective_camera.camera_direction.z = mat[2][2] * -1
-                viewpoint.perspective_camera.camera_up_vector.x = mat[0][1]
-                viewpoint.perspective_camera.camera_up_vector.y = mat[1][1]
-                viewpoint.perspective_camera.camera_up_vector.z = mat[2][1]
-                viewpoint.components = bcf.v2.data.Components()
-                c1 = bcf.v2.data.Component()
-                c1.ifc_guid = clash["a_global_id"]
-                c2 = bcf.v2.data.Component()
-                c2.ifc_guid = clash["b_global_id"]
-                viewpoint.components.selection.append(c1)
-                viewpoint.components.selection.append(c2)
-                viewpoint.components.visibility = bcf.v2.data.ComponentVisibility()
-                viewpoint.components.visibility.default_visibility = True
-                viewpoint.snapshot = self.get_viewpoint_snapshot(viewpoint, mat)
-                bcfxml.add_viewpoint(topic, viewpoint)
-            if i == 0:
-                bcfxml.save_project(self.settings.output)
-            else:
-                bcfxml.save_project(self.settings.output + f".{i}")
 
     def get_viewpoint_snapshot(self, viewpoint, mat):
         return None  # Possible to overload this function in a GUI application if used as a library
 
-    # https://blender.stackexchange.com/questions/68834/recreate-to-track-quat-with-two-vectors-using-python/141706#141706
-    def get_track_to_matrix(self, camera_position, target_position):
-        camera_direction = camera_position - target_position
-        camera_direction = camera_direction / np.linalg.norm(camera_direction)
-        camera_right = np.cross(np.array([0.0, 0.0, 1.0]), camera_direction)
-        camera_right = camera_right / np.linalg.norm(camera_right)
-        camera_up = np.cross(camera_direction, camera_right)
-        camera_up = camera_up / np.linalg.norm(camera_up)
-        rotation_transform = np.zeros((4, 4))
-        rotation_transform[0, :3] = camera_right
-        rotation_transform[1, :3] = camera_up
-        rotation_transform[2, :3] = camera_direction
-        rotation_transform[-1, -1] = 1
-        translation_transform = np.eye(4)
-        translation_transform[:3, -1] = -camera_position
-        look_at_transform = np.matmul(rotation_transform, translation_transform)
-        return np.linalg.inv(look_at_transform)
-
     def export_json(self):
         clash_sets = self.clash_sets.copy()
         for clash_set in clash_sets: