UI for changing representation item's shape aspect

Example - https://imgur.com/a/tN7hCYz
geometry.remove_representation documentation
2026-08-21 04:32:23 +00:00 · 2024-01-26 17:32:46 +05:00 · 2024-01-26 17:20:39 +05:00 · 2024-01-26 17:20:39 +05:00 · 2024-01-26 15:27:05 +05:00 · 2024-01-26 14:54:51 +05:00
19 changed files with 1956 additions and 81 deletions
@@ -0,0 +1,993 @@
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+#961=IFCINDEXEDPOLYGONALFACE((39,40,46,45));
+#962=IFCINDEXEDPOLYGONALFACE((40,41,47,46));
+#963=IFCINDEXEDPOLYGONALFACE((41,42,48,47));
+#964=IFCINDEXEDPOLYGONALFACE((48,43,49,54));
+#965=IFCINDEXEDPOLYGONALFACE((43,44,50,49));
+#966=IFCINDEXEDPOLYGONALFACE((44,45,51,50));
+#967=IFCINDEXEDPOLYGONALFACE((45,46,52,51));
+#968=IFCINDEXEDPOLYGONALFACE((46,47,53,52));
+#969=IFCINDEXEDPOLYGONALFACE((47,48,54,53));
+#970=IFCINDEXEDPOLYGONALFACE((49,50,51,52,53,54));
+#971=IFCPOLYGONALFACESET(#920,$,(#921,#922,#923,#924,#925,#926,#927,#928,#929,#930,#931,#932,#933,#934,#935,#936,#937,#938,#939,#940,#941,#942,#943,#944,#945,#946,#947,#948,#949,#950,#951,#952,#953,#954,#955,#956,#957,#958,#959,#960,#961,#962,#963,#964,#965,#966,#967,#968,#969,#970),$);
+#972=IFCSHAPEREPRESENTATION(#16,'Body','Curve2D',(#919));
+#973=IFCSHAPEREPRESENTATION(#15,'Body','Tessellation',(#971));
+#974=IFCGEOGRAPHICELEMENTTYPE('1t393Epk10ahdDnhnFR8sr',$,'Tree Medium (5m)',$,$,$,(#979,#984),$,$,.NOTDEFINED.);
+#975=IFCCARTESIANPOINT((0.,0.,0.));
+#976=IFCDIRECTION((1.,0.,0.));
+#977=IFCDIRECTION((0.,0.,1.));
+#978=IFCAXIS2PLACEMENT3D(#975,#977,#976);
+#979=IFCREPRESENTATIONMAP(#978,#973);
+#980=IFCCARTESIANPOINT((0.,0.,0.));
+#981=IFCDIRECTION((1.,0.,0.));
+#982=IFCDIRECTION((0.,0.,1.));
+#983=IFCAXIS2PLACEMENT3D(#980,#982,#981);
+#984=IFCREPRESENTATIONMAP(#983,#972);
+ENDSEC;
+END-ISO-10303-21;
@@ -80,8 +80,8 @@ 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
@@ -49,6 +49,14 @@ classes = (
    operator.SwitchRepresentation,
    operator.UpdateParametricRepresentation,
    operator.UpdateRepresentation,
+    operator.EnableEditingRepresentationItemStyle,
+    operator.EditRepresentationItemStyle,
+    operator.DisableEditingRepresentationItemStyle,
+    operator.UnassignRepresentationItemStyle,
+    operator.EnableEditingRepresentationItemShapeAspect,
+    operator.EditRepresentationItemShapeAspect,
+    operator.DisableEditingRepresentationItemShapeAspect,
+    operator.RemoveRepresentationItemFromShapeAspect,
    prop.RepresentationItem,
    prop.BIMObjectGeometryProperties,
    prop.BIMGeometryProperties,
@@ -93,7 +101,9 @@ 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 +93,23 @@ class RepresentationsData:
            )
        return results

+    @classmethod
+    def shape_aspects(cls):
+        obj = bpy.context.active_object
+        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 tool.Geometry.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
+        return [(str(s.id()), s.Name or "Unnamed", "") for s in matching_shape_aspects]
+

 class RepresentationItemsData:
    data = {}
@@ -767,11 +767,13 @@ 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.

@@ -1590,6 +1592,11 @@ 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()


 class DisableEditingRepresentationItems(bpy.types.Operator, Operator):
@@ -1600,3 +1607,143 @@ class DisableEditingRepresentationItems(bpy.types.Operator, Operator):
    def _execute(self, context):
        obj = context.active_object
        obj.BIMGeometryProperties.is_editing = False
+
+
+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"}
+
+    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 style 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"}
+
+    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 style 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 style
+        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
+        props = obj.BIMGeometryProperties
+        props.is_editing_item_shape_aspect = False
+        ifc_file = tool.Ifc.get()
+
+        shape_aspect = ifc_file.by_id(int(props.representation_item_shape_aspect))
+        representation_item_id = props.items[props.active_item_index].ifc_definition_id
+        representation_item = ifc_file.by_id(representation_item_id)
+
+        tool.Geometry.add_representation_item_to_shape_aspect(representation_item, shape_aspect)
+        # reload style 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
+        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)
+
+        tool.Geometry.remove_representation_item_from_shape_aspect(representation_item, shape_aspect)
+        # reload style ui
+        bpy.ops.bim.disable_editing_representation_items()
+        bpy.ops.bim.enable_editing_representation_items()
@@ -47,11 +47,28 @@ 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"]
+
+
 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 BIMObjectGeometryProperties(PropertyGroup):
@@ -59,6 +76,10 @@ 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")


 class BIMGeometryProperties(PropertyGroup):
@@ -187,20 +187,42 @@ 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
+            row.prop(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="")
+        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):
@@ -441,7 +441,7 @@ class Geometry(blenderbim.core.tool.Geometry):
            return styles

        usage_count = [0] * len(obj.material_slots)
-        if not usage_count: # if there are no materials, polygons will still use index 0
+        if not usage_count:  # if there are no materials, polygons will still use index 0
            return []
        for poly in obj.data.polygons:
            usage_count[poly.material_index] += 1
@@ -716,3 +716,94 @@ class Geometry(blenderbim.core.tool.Geometry):
        obj.matrix_world.translation += original_min_point - new_max_point

        bpy.context.view_layer.update()
+
+    @classmethod
+    def reload_representation(cls, obj):
+        representation = tool.Ifc.get().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
+        blenderbim.core.geometry.switch_representation(
+            tool.Ifc,
+            tool.Geometry,
+            obj=obj,
+            representation=representation,
+            should_reload=True,
+            is_global=True,
+            should_sync_changes_first=False,
+            apply_openings=True,
+        )
+
+    @classmethod
+    def get_shape_aspects(cls, element):
+        # IfcProduct
+        if hasattr(element, "Representation"):
+            return element.Representation.ShapeOfProduct
+
+        # IfcTypeProduct
+        shape_aspects = []
+        for repersentation_map in element.RepresentationMaps:
+            shape_aspects += repersentation_map.HasShapeAspects
+        return shape_aspects
+
+    @classmethod
+    def remove_representation_item_from_shape_aspect(cls, representation_item, shape_aspect):
+        ifc_file = tool.Ifc.get()
+        # as shape aspect might have multiple representations
+        # it's easier to find it from the item
+        for inverse in ifc_file.get_inverse(representation_item):
+            if inverse.is_a("IfcShapeRepresentation") and shape_aspect in inverse.OfShapeAspect:
+                representation = inverse
+                break
+
+        # removing last item would make representation invalid
+        if len(representation.Items) == 1:
+            # removing last representation would make shape aspect invalid.
+            # remove shape aspect first otherwise remove_representation won't remove it because of the inverse
+            if len(shape_aspect.ShapeRepresentations) == 1:
+                ifc_file.remove(shape_aspect)
+            tool.Ifc.run("geometry.remove_representation", representation=representation)
+        else:
+            items = set(representation.Items) - {representation_item}
+            representation.Items = tuple(items)
+
+    @classmethod
+    def add_representation_item_to_shape_aspect(cls, representation_item, shape_aspect):
+        ifc_file = tool.Ifc.get()
+        previous_shape_aspect = None
+        for inverse in ifc_file.get_inverse(representation_item):
+            if inverse.is_a("IfcShapeRepresentation"):
+                if inverse.OfShapeAspect:
+                    # item is already added to the shape aspect
+                    if inverse.OfShapeAspect[0] == shape_aspect:
+                        return
+                    previous_shape_aspect = inverse.OfShapeAspect[0]
+                else:
+                    base_representation = inverse
+
+        # remove item from previous shape aspect
+        if previous_shape_aspect:
+            cls.remove_representation_item_from_shape_aspect(representation_item, previous_shape_aspect)
+        shape_aspect_representation = cls.get_shape_aspect_representation(
+            shape_aspect, base_representation, create_new=True
+        )
+        shape_aspect_representation.Items = shape_aspect_representation.Items + (representation_item,)
+
+    @classmethod
+    def get_shape_aspect_representation(cls, shape_aspect, base_representation, create_new=False):
+        for representation in shape_aspect.ShapeRepresentations:
+            if (
+                representation.ContextOfItems == base_representation.ContextOfItems
+                and representation.RepresentationIdentifier == base_representation.RepresentationIdentifier
+                and representation.RepresentationType == base_representation.RepresentationType
+            ):
+                return representation
+
+        if not create_new:
+            return None
+
+        shape_aspect_representation = tool.Ifc.get().createIfcShapeRepresentation(
+            ContextOfItems=base_representation.ContextOfItems,
+            RepresentationIdentifier=base_representation.RepresentationIdentifier,
+            RepresentationType=base_representation.RepresentationType,
+        )
+        shape_aspect.ShapeRepresentations = shape_aspect.ShapeRepresentations + (shape_aspect_representation,)
+
+        return shape_aspect_representation
@@ -415,24 +415,25 @@ class IfcGit:
    @classmethod
    def config_ifcmerge(cls):
        config_reader = IfcGitRepo.repo.config_reader()
-        config_writer = IfcGitRepo.repo.config_writer()
        section = 'mergetool "ifcmerge"'
        if not config_reader.has_section(section):
-            config_writer.set_value(section, "cmd", "ifcmerge $BASE $LOCAL $REMOTE $MERGED")
-            config_writer.set_value(section, "trustExitCode", True)
+            with IfcGitRepo.repo.config_writer() as config_writer:
+                config_writer.set_value(section, "cmd", "ifcmerge $BASE $LOCAL $REMOTE $MERGED")
+                config_writer.set_value(section, "trustExitCode", True)
        section = 'mergetool "ifcmerge-forward"'
        if not config_reader.has_section(section):
-            config_writer.set_value(section, "cmd", "ifcmerge $BASE $REMOTE $LOCAL $MERGED")
-            config_writer.set_value(section, "trustExitCode", True)
+            with IfcGitRepo.repo.config_writer() as config_writer:
+                config_writer.set_value(section, "cmd", "ifcmerge $BASE $REMOTE $LOCAL $MERGED")
+                config_writer.set_value(section, "trustExitCode", True)

    @classmethod
    def config_push(cls, repo):
        """Set push.autoSetupRemote"""
        config_reader = repo.config_reader()
-        config_writer = repo.config_writer()
        if not config_reader.has_section("push"):
-            config_writer.set_value("push", "default", "current")
-            config_writer.set_value("push", "autoSetupRemote", True)
+            with repo.config_writer() as config_writer:
+                config_writer.set_value("push", "default", "current")
+                config_writer.set_value("push", "autoSetupRemote", True)

    @classmethod
    def config_info_attributes(cls, repo):
@@ -181,7 +181,7 @@ class Qto(blenderbim.core.tool.Qto):
        "quantity_value" : XX,
        "quantity_type" : XX
        }]
-        :rtype list
+        :rtype: list

        Example:

@@ -549,6 +549,27 @@ class Style(blenderbim.core.tool.Style):
        representation = tool.Geometry.get_active_representation(obj)
        tool.Ifc.run("style.assign_representation_styles", shape_representation=representation, styles=[style])

+    @classmethod
+    def assign_style_to_representation_item(cls, representation_item, style=None):
+        ifc_file = tool.Ifc.get()
+        if not representation_item.StyledByItem:
+            if style is None:
+                return
+            ifc_file.createIfcStyledItem(representation_item, (style,))
+
+        styled_item = representation_item.StyledByItem[0]
+        if style is None:
+            ifc_file.remove(styled_item)
+            return
+        styled_item.Styles = (style,)
+
+    @classmethod
+    def get_representation_item_style(cls, representation_item):
+        for inverse in tool.Ifc.get().get_inverse(representation_item):
+            if inverse.is_a("IfcStyledItem"):
+                for style in inverse.Styles:
+                    return style
+
    @classmethod
    def reload_material_from_ifc(cls, blender_material):
        blender_material.BIMStyleProperties.active_style_type = blender_material.BIMStyleProperties.active_style_type
@@ -25,18 +25,16 @@ from ifcopenshell.util.shape_builder import ShapeBuilder, V


 class LibraryGenerator:
-    def generate(self, output_filename="IFC4 EU Steel.ifc"):
+    def generate(self, library_name, output_filename="IFC4 EU Steel.ifc"):
        ifcopenshell.api.pre_listeners = {}
        ifcopenshell.api.post_listeners = {}

        self.materials = {}

        self.file = ifcopenshell.api.run("project.create_file")
-        self.project = ifcopenshell.api.run(
-            "root.create_entity", self.file, ifc_class="IfcProject", name=f"Non-structural assets library"
-        )
+        self.project = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcProject", name=library_name)
        self.library = ifcopenshell.api.run(
-            "root.create_entity", self.file, ifc_class="IfcProjectLibrary", name=f"Non-structural assets library"
+            "root.create_entity", self.file, ifc_class="IfcProjectLibrary", name=library_name
        )
        ifcopenshell.api.run(
            "project.assign_declaration", self.file, definition=self.library, relating_context=self.project
@@ -1876,4 +1874,6 @@ class LibraryGenerator:

 if __name__ == "__main__":
    path = Path(__file__).parents[1] / "blenderbim/bim/data/libraries"
-    LibraryGenerator().generate(output_filename=str(path / "IFC4 Furniture Library.ifc"))
+    LibraryGenerator().generate(
+        "Non-structural assets library", output_filename=str(path / "IFC4 Furniture Library.ifc")
+    )
@@ -0,0 +1,403 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2024 @Andrej730
+#
+# 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 ifcopenshell
+import ifcopenshell.api
+import random
+from math import cos, sin, tan, pi
+from pathlib import Path
+from itertools import chain
+from ifcopenshell.util.shape_builder import ShapeBuilder, V
+from collections import namedtuple
+from mathutils import Vector, Matrix
+from random import uniform
+
+
+SimpleTreeParams = namedtuple("SimpleTreeParams", "plant_height crown_diameter trunk_diameter")
+LowPolyTreeParams = namedtuple(
+    "LowPolyTreeParams", "plant_height crown_diameter crown_max_loc crown_taper trunk_height trunk_diameter random_seed"
+)
+PalmTreeParams = namedtuple("PalmTreeParams", "plant_height crown_diameter trunk_diameter")
+TreePresetData = namedtuple("TreePresetData", "preset_class generator")
+
+
+GeneratedGeometry = namedtuple("GeneratedGeometry", "items_2d items_3d")
+
+
+def generate_low_poly_tree(
+    builder: ShapeBuilder,
+    crown_taper=0.5,
+    crown_max_loc=0.3,
+    plant_height=12.0,
+    trunk_height=2.0,
+    crown_diameter=4,
+    trunk_diameter=0.3,
+    random_seed=10,
+) -> GeneratedGeometry:
+    unit_conversion = 1 / ifcopenshell.util.unit.calculate_unit_scale(builder.file)
+    random.seed(random_seed)
+    res = 6
+    plant_height *= unit_conversion
+    trunk_height *= unit_conversion
+    crown_diameter *= unit_conversion
+    trunk_diameter *= unit_conversion
+    crown_height = plant_height - trunk_height
+
+    def circle(center, r, res):
+        points = []
+        for i in range(res):
+            # fmt: off
+            vert = (
+                cos(i * 2 * pi / res) * r + center[0],
+                sin(i * 2 * pi / res) * r + center[1],
+                0.0 + center[2]
+            )
+            # fmt: on
+            points.append(vert)
+        return points
+
+    def merge_lists(lists):
+        merged_list = []
+        for i in range(len(lists)):
+            merged_list = merged_list + lists[i]
+        return merged_list
+
+    def XY_scale(vert, scale):
+        vert_scaled = (vert[0] * scale, vert[1] * scale, vert[2])
+        return vert_scaled
+
+    def rand_add(vert, amp):
+        # fmt: off
+        vert_new = (
+            vert[0] + uniform(-amp, amp),
+            vert[1] + uniform(-amp, amp),
+            vert[2] + uniform(-amp, amp)
+        )
+        # fmt: on
+        return vert_new
+
+    height_segments_trunk = 2
+    height_segments_crown = 7
+    height_segments_total = height_segments_trunk + height_segments_crown
+
+    verts = []
+
+    # Trunk
+    for i in range(height_segments_trunk):
+        points = circle((0.0, 0.0, i * trunk_height), trunk_diameter / 2, res)
+        verts.append(points)
+
+    # Crown
+    h_crown_max_loc = int((height_segments_crown - 1) * crown_max_loc)
+    crown_indices = []
+    for i in range(0, h_crown_max_loc):
+        crown_indices.append(i)
+    for i in range(0, height_segments_crown - h_crown_max_loc):
+        crown_indices.append(h_crown_max_loc - i)
+
+    my_min_val = min(crown_indices)
+    my_max_val = max(crown_indices)
+
+    n_crown_taper = crown_taper * 0.8
+
+    crown_diameters = []
+    for x in crown_indices:
+        crown_diameters.append(((x - my_min_val) / (my_max_val - my_min_val)) * n_crown_taper + (1 - n_crown_taper))
+
+    randomize_amplitude = plant_height / 50
+
+    crown_segment_height = crown_height / height_segments_crown
+    for i in range(0, height_segments_crown - 1):
+        points = circle(
+            (0.0, 0.0, trunk_height + (i + 1) * crown_segment_height),
+            crown_diameter * crown_diameters[i] / 2,
+            res,
+        )
+        for i in range(0, len(points)):
+            points[i] = rand_add(points[i], randomize_amplitude)
+        verts.append(points)
+
+    # Top
+    verts.append(circle((0.0, 0.0, plant_height), 0.05, res))
+
+    edge_loops = []
+    for i in range(height_segments_total):
+        edge_loops.append(range(i * res, (i + 1) * res))
+
+    verts = merge_lists(verts)
+
+    faces = []
+    bottom = [*edge_loops[0]]
+    faces.append(bottom)
+    for i in range(height_segments_total - 1):
+        for j in range(res):
+            face = (edge_loops[i][j - 1], edge_loops[i][j], edge_loops[i + 1][j], edge_loops[i + 1][j - 1])
+            faces.append(face)
+    top = [*edge_loops[-1]]
+    faces.append(top)
+
+    verts_3D = [verts]
+    faces_3D = [faces]
+
+    verts_2D = [
+        [
+            (-0.5865642428398132, 0.8647078275680542, 0.0),
+            (-0.7583824992179871, 0.6572927236557007, 0.0),
+            (-0.7234422564506531, 0.5865941047668457, 0.0),
+            (-0.8714070916175842, 0.46631893515586853, 0.0),
+            (-0.9203394055366516, 0.15792329609394073, 0.0),
+            (-0.6487269997596741, 0.11522211134433746, 0.0),
+            (-0.9273074269294739, 0.0903107076883316, 0.0),
+            (-0.9606701731681824, -0.2852219343185425, 0.0),
+            (-0.8060722351074219, -0.35055163502693176, 0.0),
+            (-0.8271104693412781, -0.4677186608314514, 0.0),
+            (-0.6899875998497009, -0.6695915460586548, 0.0),
+            (-0.6215555667877197, -0.6767659187316895, 0.0),
+            (-0.4315463900566101, -0.8824808597564697, 0.0),
+            (-0.30316293239593506, -0.9023936986923218, 0.0),
+            (-0.32218849658966064, -0.8037619590759277, 0.0),
+            (-0.21792533993721008, -0.9530860185623169, 0.0),
+            (0.36917445063591003, -0.877334475517273, 0.0),
+            (0.30831706523895264, -0.685136079788208, 0.0),
+            (0.4778200685977936, -0.8094909191131592, 0.0),
+            (0.9163193106651306, -0.368840754032135, 0.0),
+            (0.827597439289093, -0.29377281665802, 0.0),
+            (0.9478662610054016, -0.245104119181633, 0.0),
+            (0.9667968153953552, 0.08458180725574493, 0.0),
+            (0.7529001832008362, 0.05212751030921936, 0.0),
+            (0.9102436900138855, 0.19098728895187378, 0.0),
+            (0.8279229998588562, 0.5522171258926392, 0.0),
+            (0.6635335087776184, 0.6461355686187744, 0.0),
+            (0.5753684639930725, 0.8170149326324463, 0.0),
+            (0.3976244330406189, 0.8779193162918091, 0.0),
+            (0.18733686208724976, 0.7513588666915894, 0.0),
+            (0.338344544172287, 0.910933256149292, 0.0),
+            (-0.013130240142345428, 0.9798095226287842, 0.0),
+            (-0.18649885058403015, 0.9414206743240356, 0.0),
+            (-0.3193224370479584, 0.8835403919219971, 0.0),
+        ]
+    ]
+    edges_2D = []
+    faces_2D = []
+
+    verts_2D_new = []
+    for vert in verts_2D[0]:
+        verts_2D_new.append(XY_scale(vert, crown_diameter / 2))
+
+    range_of_verts = range(0, len(verts_2D[0]))
+    for i in range_of_verts:
+        edges_2D.append([range_of_verts[i - 1], i])
+        faces_2D.append(i)
+
+    verts_2D[0] = verts_2D_new
+    edges_2D = [edges_2D]
+    faces_2D = [[faces_2D]]
+
+    verts_2D = [Vector(v).to_2d() for v in verts_2D[0]]
+    shape_2d = builder.polyline(points=verts_2D, closed=True)
+    shape_3d = builder.polygonal_face_set(points=verts_3D[0], faces=faces_3D[0])
+
+    return GeneratedGeometry((shape_2d,), (shape_3d,))
+
+
+def generate_simple_tree(
+    builder: ShapeBuilder, plant_height=2, crown_diameter=2, trunk_diameter=0.1
+) -> GeneratedGeometry:
+    unit_conversion = 1 / ifcopenshell.util.unit.calculate_unit_scale(builder.file)
+    plant_height *= unit_conversion
+    crown_diameter *= unit_conversion
+    trunk_diameter *= unit_conversion
+
+    crown_radius = crown_diameter / 2
+
+    # 3d shape
+    trunk_base = builder.circle(radius=trunk_diameter / 2)
+    trunk = builder.extrude(trunk_base, magnitude=plant_height - crown_diameter)
+    crown_position = (0.0, 0.0, (plant_height - crown_radius))
+    crown = builder.sphere(radius=crown_radius, center=crown_position)
+
+    # 2d shape
+    shape_2D = builder.circle(radius=crown_radius)
+
+    return GeneratedGeometry((shape_2D,), (trunk, crown))
+
+
+def generate_palm_tree(
+    builder: ShapeBuilder, plant_height=2, crown_diameter=5.8, trunk_diameter=0.1
+) -> GeneratedGeometry:
+    unit_conversion = 1 / ifcopenshell.util.unit.calculate_unit_scale(builder.file)
+
+    palm_verts = [
+        Vector((-3.6415634155273438, -3.8275668621063232, -1.0948246717453003)),
+        Vector((-0.3698049783706665, -1.805966854095459, 0.493910551071167)),
+        Vector((-1.6397790908813477, -0.5056067705154419, 0.04353363811969757)),
+        Vector((0.0, 0.0, 0.0)),
+        Vector((5.023162364959717, -1.6531240940093994, -1.0948246717453003)),
+        Vector((1.8090602159500122, 0.4589407444000244, 0.493910551071167)),
+        Vector((1.1666079759597778, -1.2413609027862549, 0.04353363811969757)),
+        Vector((1.6942416429519653, 5.038582801818848, -1.0948246717453003)),
+        Vector((-0.43215513229370117, 1.833944320678711, 0.493910551071167)),
+        Vector((1.2652605772018433, 1.1839056015014648, 0.04353363811969757)),
+        Vector((-4.577561378479004, 2.689336061477661, -1.0948246717453003)),
+        Vector((-1.8646581172943115, -0.0367276668548584, 0.493910551071167)),
+        Vector((-0.8873085975646973, 1.4957730770111084, 0.04353363811969757)),
+    ]
+    palm_faces = [(2, 1, 0), (2, 3, 1), (6, 5, 4), (6, 3, 5), (9, 8, 7), (9, 3, 8), (12, 11, 10), (12, 3, 11)]
+    # each segment starts with the last point from the previous
+    palm_segments_2d_ifc = [(3, 11, 10, 12, 3), (3, 1, 0, 2, 3), (3, 5, 4, 6, 3), (3, 8, 7, 9, 3)]
+    palm_segments_2d_ifc = [[i + 1 for i in segment] for segment in palm_segments_2d_ifc]  # IFC indices start with 1
+
+    scale = Vector()
+    scale.xyz = crown_diameter / 11.6
+    leaves_height = 0.493910551071167 * scale.z
+    plant_height -= leaves_height
+    for v in palm_verts:
+        v *= scale
+        v.z += plant_height
+        v *= unit_conversion
+
+    plant_height *= unit_conversion
+    crown_diameter *= unit_conversion
+    trunk_diameter *= unit_conversion
+
+    # 3d
+    leaves = builder.polygonal_face_set(palm_verts, palm_faces)
+    trunk_base = builder.circle(radius=trunk_diameter / 2)
+    trunk = builder.extrude(trunk_base, magnitude=plant_height)
+
+    # 2d
+    remove_z = Vector((1, 1, 0))
+    verts_2D = [v * remove_z for v in palm_verts]
+    ifc_points = builder.file.createIfcCartesianPointList2D(verts_2D)
+    ifc_segments = []
+    for segment in palm_segments_2d_ifc:
+        ifc_segments.append(builder.file.createIfcLineIndex(segment))
+    shape_2d = builder.file.createIfcIndexedPolyCurve(Points=ifc_points, Segments=ifc_segments)
+    return GeneratedGeometry((shape_2d,), (leaves, trunk))
+
+
+tree_presets = {
+    "simple": TreePresetData(SimpleTreeParams, generate_simple_tree),
+    "low_poly": TreePresetData(LowPolyTreeParams, generate_low_poly_tree),
+    "palm_tree": TreePresetData(PalmTreeParams, generate_palm_tree),
+}
+
+
+class LibraryGenerator:
+    def generate(self, library_name, output_filename="IFC4 EU Steel.ifc"):
+        ifcopenshell.api.pre_listeners = {}
+        ifcopenshell.api.post_listeners = {}
+
+        self.materials = {}
+
+        self.file = ifcopenshell.api.run("project.create_file")
+        self.project = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcProject", name=library_name)
+        self.library = ifcopenshell.api.run(
+            "root.create_entity", self.file, ifc_class="IfcProjectLibrary", name=library_name
+        )
+        ifcopenshell.api.run(
+            "project.assign_declaration", self.file, definition=self.library, relating_context=self.project
+        )
+        unit = ifcopenshell.api.run("unit.add_si_unit", self.file, unit_type="LENGTHUNIT", prefix="MILLI")
+        ifcopenshell.api.run("unit.assign_unit", self.file, units=[unit])
+
+        model = ifcopenshell.api.run("context.add_context", self.file, context_type="Model")
+        plan = ifcopenshell.api.run("context.add_context", self.file, context_type="Plan")
+        self.representations = {
+            "model_body": ifcopenshell.api.run(
+                "context.add_context",
+                self.file,
+                context_type="Model",
+                context_identifier="Body",
+                target_view="MODEL_VIEW",
+                parent=model,
+            ),
+            "plan_body": ifcopenshell.api.run(
+                "context.add_context",
+                self.file,
+                context_type="Plan",
+                context_identifier="Body",
+                target_view="PLAN_VIEW",
+                parent=plan,
+            ),
+        }
+
+        self.builder = ShapeBuilder(self.file)
+        builder = self.builder
+
+        TreeData = namedtuple("TreeData", "tree_name preset_name preset_data")
+        trees = [
+            TreeData("Cone Tree (1.8m)", "low_poly", (1.8, 1.13, 0.0, 1.0, 0.28, 0.16, 10)),
+            TreeData("Cone Tree (15m)", "low_poly", (15.0, 4.37, 0.0, 1.0, 0.74, 0.44, 10)),
+            TreeData("Cone Tree (5m)", "low_poly", (5.0, 1.7, 0.0, 1.0, 0.32, 0.22, 10)),
+            TreeData("Hedge Small (0.4m)", "low_poly", (0.4, 0.4, 0.49, 0.15, 0.0, 0.0, 10)),
+            TreeData("Hedge Medium (0.8m)", "low_poly", (0.8, 0.8, 0.49, 0.15, 0.0, 0.0, 10)),
+            TreeData("Hedge Big (1.8m)", "low_poly", (1.8, 1.8, 0.49, 0.15, 0.0, 0.0, 10)),
+            TreeData("Palm Tree (5m)", "palm_tree", (5.0, 8.02, 0.2)),
+            TreeData("Palm Tree (15m)", "palm_tree", (15.0, 16.64, 0.4)),
+            TreeData("Shrub Small (0.4m)", "low_poly", (0.4, 0.4, 0.535, 0.524, 0.0, 0.0, 10)),
+            TreeData("Shrum Medium (0.8m)", "low_poly", (0.8, 0.8, 0.535, 0.524, 0.0, 0.0, 10)),
+            TreeData("Shrub Big (1.8m)", "low_poly", (1.8, 1.8, 0.535, 0.524, 0.0, 0.0, 10)),
+            TreeData("Simple Tree (1.8m)", "simple", (1.8, 1.34, 0.2)),
+            TreeData("Simple Tree (5m)", "simple", (5.0, 3.29, 0.2)),
+            TreeData("Simple Tree (15m)", "simple", (15.0, 9.21, 0.44)),
+            TreeData("Tree Small (1.8m)", "low_poly", (1.8, 1.7, 0.5, 0.36, 0.28, 0.16, 10)),
+            TreeData("Tree Big (15m)", "low_poly", (15.0, 10.0, 0.5, 0.36, 1.83, 0.44, 10)),
+            TreeData("Tree Medium (5m)", "low_poly", (5.0, 5.0, 0.5, 0.36, 0.84, 0.22, 10)),
+        ]
+
+        for tree_data in trees:
+            preset = tree_presets.get(tree_data.preset_name)
+            preset_data = preset.preset_class(*tree_data.preset_data)._asdict()
+            tree_geometry = preset.generator(builder, **preset_data)
+            self.create_explicit_type(
+                "IfcGeographicElementType", tree_data.tree_name, **self.get_representations(tree_geometry)
+            )
+
+        self.file.write(output_filename)
+
+    def get_representations(self, generated_geometry: GeneratedGeometry):
+        representation_2d = self.builder.get_representation(
+            self.representations["plan_body"], items=generated_geometry.items_2d
+        )
+        representation_3d = self.builder.get_representation(
+            self.representations["model_body"], items=generated_geometry.items_3d
+        )
+        return {
+            "representation_3d": representation_3d,
+            "representation_2d": representation_2d,
+        }
+
+    def create_explicit_type(self, ifc_class, name, representation_3d, representation_2d, **params):
+        element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class=ifc_class, name=name)
+        for param, value in params.items():
+            setattr(element, param, value)
+
+        ifcopenshell.api.run(
+            "geometry.assign_representation", self.file, product=element, representation=representation_3d
+        )
+        ifcopenshell.api.run(
+            "geometry.assign_representation", self.file, product=element, representation=representation_2d
+        )
+        ifcopenshell.api.run("project.assign_declaration", self.file, definition=element, relating_context=self.library)
+        return element
+
+
+if __name__ == "__main__":
+    path = Path(__file__).parents[1] / "blenderbim/bim/data/libraries"
+    LibraryGenerator().generate("Landscape Assets Library", output_filename=str(path / "IFC4 Landscape Library.ifc"))
@@ -23,6 +23,7 @@ import blenderbim.core.tool
 import blenderbim.tool as tool
 from test.bim.bootstrap import NewFile
 from blenderbim.tool.style import Style as subject
+from ifcopenshell.util.shape_builder import ShapeBuilder


 class TestImplementsTool(NewFile):
@@ -166,7 +167,7 @@ class TestGetSurfaceRenderingAttributes(NewFile):
        output = tool.Blender.get_material_node(obj, "OUTPUT_MATERIAL")
        node = tool.Blender.get_material_node(obj, "BSDF_PRINCIPLED")
        obj.node_tree.nodes.remove(node)
-    
+
        node = obj.node_tree.nodes.new(type="ShaderNodeBsdfGlossy")
        node.inputs["Color"].default_value = [0.5, 0.5, 0.5, 0.5]
        node.inputs["Roughness"].default_value = 0.2
@@ -197,7 +198,7 @@ class TestGetSurfaceRenderingAttributes(NewFile):
        output = tool.Blender.get_material_node(obj, "OUTPUT_MATERIAL")
        node = tool.Blender.get_material_node(obj, "BSDF_PRINCIPLED")
        obj.node_tree.nodes.remove(node)
-        
+
        node = obj.node_tree.nodes.new(type="ShaderNodeBsdfDiffuse")
        node.inputs["Color"].default_value = [0.5, 0.5, 0.5, 0.5]
        node.inputs["Roughness"].default_value = 0.2
@@ -460,3 +461,36 @@ class TestIsEditingStyles(NewFile):
        subject.is_editing_styles() is False
        bpy.context.scene.BIMStylesProperties.is_editing = True
        subject.is_editing_styles() is True
+
+
+class TestGetRepresentationStyleItem(NewFile):
+    def test_run(self):
+        tool.Ifc.set(ifc := ifcopenshell.file())
+        builder = ShapeBuilder(ifc)
+        rectangle = builder.rectangle()
+
+        assert subject.get_representation_item_style(rectangle) == None
+        style = ifc.createIfcSurfaceStyle()
+        subject.assign_style_to_representation_item(rectangle, style)
+        assert subject.get_representation_item_style(rectangle) == style
+
+
+class TestAssignStyleToRepresentationItem(NewFile):
+    def test_run(self):
+        tool.Ifc.set(ifc := ifcopenshell.file())
+        builder = ShapeBuilder(ifc)
+        rectangle = builder.rectangle()
+
+        # assigning new style
+        style1 = ifc.createIfcSurfaceStyle()
+        subject.assign_style_to_representation_item(rectangle, style1)
+        assert subject.get_representation_item_style(rectangle) == style1
+
+        # changing style
+        style2 = ifc.createIfcSurfaceStyle()
+        subject.assign_style_to_representation_item(rectangle, style2)
+        assert subject.get_representation_item_style(rectangle) == style2
+
+        # unassigning styles
+        subject.assign_style_to_representation_item(rectangle, None)
+        assert subject.get_representation_item_style(rectangle) == None
@@ -21,6 +21,19 @@ import ifcopenshell.util.element

 class Usecase:
    def __init__(self, file, **settings):
+        """Remove a representation.
+
+        Also purges representation items and their related elements
+        like IfcStyledItem, tessellated facesets colours and UV map.
+
+        :param representation: IfcRepresentation to remove.
+            Note that it's expected that IfcRepresentation won't be in use
+            before calling this method (in such elements as IfcProductRepresentation, IfcShapeAspect)
+            otherwise representation won't be removed.
+        :type representation: ifcopenshell.entity_instance
+        :return: None
+        :rtype: None
+        """
        self.file = file
        self.settings = {"representation": None}
        for key, value in settings.items():
@@ -34,7 +47,7 @@ class Usecase:
        for subelement in self.file.traverse(self.settings["representation"]):
            if subelement.is_a("IfcRepresentationItem"):
                [styled_items.add(s) for s in subelement.StyledByItem or []]
-                # IfcTesselatedFaceSet inverses
+                # IfcTessellatedFaceSet inverses
                [textures.add(t) for t in getattr(subelement, "HasTextures", []) or []]
                [colours.add(t) for t in getattr(subelement, "HasColours", []) or []]
            elif subelement.is_a("IfcRepresentation"):
@@ -54,7 +54,7 @@ class Usecase:
            the work performed.
        :type resource: ifcopenshell.entity_instance.entity_instance
        :return None:
-        :rtype None:
+        :rtype: None:
        """
        self.file = file
        self.settings = {"resource": resource}
@@ -62,9 +62,7 @@ class Usecase:
    def execute(self):
        if ifcopenshell.util.constraint.is_attribute_locked(self.settings["resource"], "Usage.ScheduleWork"):
            return
-        amount_worked = ifcopenshell.util.resource.get_resource_required_work(
-            self.settings["resource"]
-        )
+        amount_worked = ifcopenshell.util.resource.get_resource_required_work(self.settings["resource"])
        if not amount_worked:
            return
        if not self.settings["resource"].Usage:
@@ -338,7 +338,7 @@ def get_type(element):
    :param element: The element occurrence
    :type: ifcopenshell.entity_instance.entity_instance
    :return: The related type element
-    :rtype ifcopenshell.entity_instance.entity_instance
+    :rtype: ifcopenshell.entity_instance.entity_instance

    Example:

@@ -817,8 +817,9 @@ def get_aggregate(element):
    Example:

    .. code:: python
-    element = file.by_type("IfcBeam")[0]
-    aggregate = ifcopenshell.util.element.get_aggregate(element)
+
+        element = file.by_type("IfcBeam")[0]
+        aggregate = ifcopenshell.util.element.get_aggregate(element)
    """
    if hasattr(element, "Decomposes") and element.Decomposes:
        if element.Decomposes[0].is_a("IfcRelAggregates"):  # IFC2X3
@@ -835,8 +836,9 @@ def get_nest(element):
    Example:

    .. code:: python
-    element = file.by_type("IfcBeam")[0]
-    aggregate = ifcopenshell.util.element.get_nest(element)
+
+        element = file.by_type("IfcBeam")[0]
+        aggregate = ifcopenshell.util.element.get_nest(element)
    """
    if hasattr(element, "Nests"):
        if element.Nests:
@@ -856,9 +858,9 @@ def get_parts(element):
    Example:

    .. code:: python
-    element = file.by_type("IfcElementAssembly")[0]
-    parts = ifcopenshell.util.element.get_parts(element)

+        element = file.by_type("IfcElementAssembly")[0]
+        parts = ifcopenshell.util.element.get_parts(element)
    """
    if hasattr(element, "IsDecomposedBy") and element.IsDecomposedBy:
        if element.IsDecomposedBy[0].is_a("IfcRelAggregates"):
@@ -879,9 +881,9 @@ def get_components(element, include_ports=False):
    Example:

    .. code:: python
-    element = file.by_type("IfcElementAssembly")[0]
-    components = ifcopenshell.util.element.get_components(element)

+        element = file.by_type("IfcElementAssembly")[0]
+        components = ifcopenshell.util.element.get_components(element)
    """
    if hasattr(element, "IsNestedBy"):
        if element.IsNestedBy:
@@ -47,27 +47,44 @@ round_vector_to_precision = lambda v, si_conversion: Vector([round_to_precision(


 class ShapeBuilder:
-    def __init__(self, ifc_file):
+    def __init__(self, ifc_file: ifcopenshell.file):
        self.file = ifc_file

    def polyline(
        self, points: List[Vector], closed: bool = False, position_offset: Vector = None, arc_points: List[int] = []
-    ):
+    ) -> ifcopenshell.entity_instance:
        """
        Generate an IfcIndexedPolyCurve based on the provided points.

-        :param points: List of points formatted as ( (x0, y0), (x1, y1) )
-        :type: List[Vector]
-        :param closed: Whether polyline should be closed. Default is False.
-        :type: bool, optional
-        :param position_offset: Optional offset to be applied to all points.
-        :type: Optional[Vector]
+        :param points: List of 2d or 3d points
+        :type points: List[Vector]
+        :param closed: Whether polyline should be closed. Default is `False`
+        :type closed: bool, optional
+        :param position_offset: offset to be applied to all points
+        :type position_offset: Vector, optional
        :param arc_points: Indices of the middle points for arcs. For creating an arc segment,
-        provide 3 points: `arc_start`, `arc_middle` and `arc_end` and add the `arc_middle`
-        point's index to this list.
-        :type: List[int]
+            provide 3 points: `arc_start`, `arc_middle` and `arc_end` to `points` and add the `arc_middle`
+            point's index to `arc_points`
+        :type arc_points: List[int], optional

        :return: IfcIndexedPolyCurve
+        :rtype: ifcopenshell.entity_instance
+
+        Example:
+
+        .. code:: python
+
+            # rectangle
+            points = Vector((0, 0)), Vector((1, 0)), Vector((1, 1)), Vector((0, 1))
+            position = Vector((2, 0))
+            # #2=IfcIndexedPolyCurve(#1,(IfcLineIndex((1,2,3,4,1))),$)
+            polyline = builder.polyline(points, closed=True, position_offset=position)
+
+            # arc between points (1,0) and (0,1). Second point in the arc should be it's middle
+            points = Vector((1, 0)), Vector((0.707, 0.707)), Vector((0, 1)), Vector((0,2))
+            arc_points = (1,) # point with index 1 is a middle of the arc
+            # 4=IfcIndexedPolyCurve(#3,(IfcArcIndex((1,2,3)),IfcLineIndex((3,4,1))),$)
+            curved_polyline = builder.polyline(points, closed=False, position_offset=position, arc_points=arc_points)
        """

        if arc_points and self.file.schema == "IFC2X3":
@@ -130,9 +147,24 @@ class ShapeBuilder:
        ifc_curve = self.file.createIfcIndexedPolyCurve(Points=ifc_points, Segments=ifc_segments)
        return ifc_curve

-    def get_rectangle_coords(self, size: Vector = Vector((1.0, 1.0)).freeze(), position: Vector = None):
-        """get rectangle coords in counter-clockwise order
-        starting from the bottom left corner"""
+    def get_rectangle_coords(self, size: Vector = Vector((1.0, 1.0)).freeze(), position: Vector = None) -> List[Vector]:
+        """
+        Get rectangle coords arranged as below:
+
+        ::
+
+            3 2
+            0 1
+
+        :param size: rectangle size, could be either 2d or 3d, defaults to `(1,1)`
+        :type size: Vector, optional
+        :param position: rectangle position, default to `None`.
+            if `position` not specified zero-vector will be used
+        :type position: Vector, optional
+
+        :return: list of rectangle coords
+        :rtype: List[Vector]
+        """
        dimensions = len(size)

        if not position:
@@ -150,22 +182,33 @@ class ShapeBuilder:
        ]
        return points

-    def rectangle(self, size: Vector = Vector((1.0, 1.0)).freeze(), position: Vector = None):
+    def rectangle(
+        self, size: Vector = Vector((1.0, 1.0)).freeze(), position: Vector = None
+    ) -> ifcopenshell.entity_instance:
        """
-        Generate a rectangle polyline, method supports both 2d and 3d rectangle sizes.
+        Generate a rectangle polyline.

-        :param size: rectangle size
-        :param type: Vector
-        :param size: rectangle position, default to `None`.
-        if `position` not specified zero-vector will be used
-        :param type: Vector, optional
+        :param size: rectangle size, could be either 2d or 3d, defaults to `(1,1)`
+        :type size: Vector, optional
+        :param position: rectangle position, default to `None`.
+            if `position` not specified zero-vector will be used
+        :type position: Vector, optional

        :return: IfcIndexedPolyCurve
+        :rtype: ifcopenshell.entity_instance
        """
        return self.polyline(self.get_rectangle_coords(size, position), closed=True)

-    def circle(self, center: Vector = Vector((0.0, 0.0)).freeze(), radius=1.0):
-        # < returns IfcCircle
+    def circle(self, center: Vector = Vector((0.0, 0.0)).freeze(), radius: float = 1.0) -> ifcopenshell.entity_instance:
+        """
+        :param center: circle 2D position, defaults to zero-vector
+        :type center: Vector, optional
+        :param radius: radius of the circle, defaults to 1.0
+        :type radius: float, optional
+
+        :return: IfcCircle
+        :rtype: ifcopenshell.entity_instance
+        """
        ifc_center = self.file.createIfcAxis2Placement2D(self.file.createIfcCartesianPoint(center))
        ifc_curve = self.file.createIfcCircle(ifc_center, radius)

@@ -556,6 +599,24 @@ class ShapeBuilder:

        return processed_objects if (multiple_objects or multiple_transformations) else processed_objects[0]

+    def sphere(self, radius: float = 1.0, center: Vector = Vector((0, 0, 0)).freeze()) -> ifcopenshell.entity_instance:
+        """
+        :param radius: radius of the sphere, defaults to 1.0
+        :type radius: float, optional
+        :param center: sphere position, defaults to zero-vector
+        :type center: Vector, optional
+
+        :return: IfcSphere
+        :rtype: ifcopenshell.entity_instance
+        """
+
+        ifc_position = self.file.createIfcAxis2Placement3D(
+            self.file.createIfcCartesianPoint(center),  # position
+            self.file.createIfcDirection((0.0, 0.0, 1.0)),  # Z-axis / Axis
+            self.file.createIfcDirection((1.0, 0.0, 0.0)),  # X-axis / RefDirection
+        )
+        return self.file.createIfcSphere(Radius=radius, Position=ifc_position)
+
    def extrude(
        self,
        profile_or_curve,
@@ -616,16 +677,17 @@ class ShapeBuilder:
        disk_solid = self.file.createIfcSweptDiskSolid(Directrix=path_curve, Radius=radius)
        return disk_solid

-    def get_representation(self, context, items, representation_type: str = None):
+    def get_representation(self, context, items, representation_type: str = None) -> ifcopenshell.entity_instance:
        """Create IFC representation for the specified context and items.

        :param context: IfcGeometricRepresentationSubContext
        :param items: could be a list or single curve/IfcExtrudedAreaSolid
        :param representation_type: Explicitly specified RepresentationType, defaults to `None`.
-        If not provided it will be guessed from the items types.
+            If not provided it will be guessed from the items types
        :type representation_type: str, optional

        :return: IfcRepresentation
+        :rtype: ifcopenshell.entity_instance
        """
        if not isinstance(items, collections.abc.Iterable):
            items = [items]
@@ -726,7 +788,7 @@ class ShapeBuilder:
        > coords:        list of 2d coords. Example: ((x0,y0), (x1,y1), (x2, y2))
        > fillets:       list of points from `coords` to base fillet on. Example: (1,)
        > fillet_radius: list of fillet radius for each of corresponding point form `fillets`. Example: (5.,)
-                            Note: filler_radius could be just 1 float value if it's the same for all fillets.
+        Note: filler_radius could be just 1 float value if it's the same for all fillets.

        Optional arguments:
        > closed:           boolean whether curve should be closed (whether last point connected to first one). Default: True
@@ -1335,23 +1397,23 @@ class ShapeBuilder:
        radius: float,
        bend_vector: Vector,
        flip_z_axis: bool,
-    ):
+    ) -> ifcopenshell.entity_instance:
        """

        :param segment: IfcFlowSegment for a bend.
-        Note that for a bend start and end segments types should match.
-
+            Note that for a bend start and end segments types should match.
+        :type segment: ifcopenshell.entity_instance
        :param angle: bend angle, in radians
-        :param type: float
+        :type angle: float
        :param radius: bend radius
-        :param type: float
+        :type radius: float
        :param bend_vector: offset between start and end segments in local space of start segment
            used mainly to determine the second bend axis and it's direction (positive or negative),
            the actual magnitude of the vector is not important (though near zero values will be ignored).
-        :param type: Vector
+        :type bend_vector: Vector
        :param flip_z_axis: since we cannot determine z axis direction from the profile offset,
-        there is an option to flip it if bend is going by start segment Z- axis.
-        :param type: bool
+            there is an option to flip it if bend is going by start segment Z- axis.
+        :type flip_z_axis: bool

        :return: tuple of Model/Body/MODEL_VIEW IfcRepresentation and transition shape data
        """
@@ -19,11 +19,50 @@
 import pytest
 import test.bootstrap
 import ifcopenshell.api
+import numpy as np
 from ifcopenshell.util.shape_builder import ShapeBuilder, V, is_x
 from math import degrees, radians, tan
 from mathutils import Vector


+class TestCreatePolyline(test.bootstrap.IFC4):
+    def test_simple_polyline(self):
+        builder = ShapeBuilder(self.file)
+
+        # rectangle
+        points = Vector((0, 0)), Vector((1, 0)), Vector((1, 1)), Vector((0, 1))
+        position = Vector((2, 0))
+        polyline = builder.polyline(points, closed=True, position_offset=position)
+
+        points = [p + position for p in points]
+        assert np.allclose(np.array(points), np.array(polyline.Points.CoordList))
+        # use 1 line index if there are no arcs
+        assert len(polyline.Segments) == 1
+        segment = polyline.Segments[0]
+        assert segment.is_a("IfcLineIndex")
+        assert segment.wrappedValue == (1, 2, 3, 4, 1)
+
+    def test_polyline_with_arc(self):
+        builder = ShapeBuilder(self.file)
+
+        points = Vector((1, 0)), Vector((0.707, 0.707)), Vector((0, 1)), Vector((0, 2))
+        position = Vector((2, 0))
+        arc_points = (1,)
+        # 4=IfcIndexedPolyCurve(#3,(IfcArcIndex((1,2,3)),IfcLineIndex((3,4,1))),$)
+        polyline = builder.polyline(points, closed=False, position_offset=position, arc_points=arc_points)
+        points = [p + position for p in points]
+        assert np.allclose(np.array(points), np.array(polyline.Points.CoordList))
+        assert len(polyline.Segments) == 2
+
+        segment = polyline.Segments[0]
+        assert segment.is_a("IfcArcIndex")
+        assert segment.wrappedValue == (1, 2, 3)
+
+        segment = polyline.Segments[1]
+        assert segment.is_a("IfcLineIndex")
+        assert segment.wrappedValue == (3, 4)
+
+
 class TestCalculateTransitions(test.bootstrap.IFC4):
    def calculate_and_test(self, params, length):
        end_profile = params["end_profile"]
Author	SHA1	Message	Date
Andrej730	0da3270c7f	UI for changing representation item's shape aspect Example - https://imgur.com/a/tN7hCYz	2024-01-26 17:32:46 +05:00
Andrej730	fda6fc6c48	geometry.remove_representation documentation	2024-01-26 17:20:39 +05:00
Andrej730	3865f01df9	operator to remove representation item from shape aspect	2024-01-26 17:20:39 +05:00
Andrej730	6bf61d7163	Simple UI to display repr item shape aspect Example - https://i.imgur.com/YEAE9zU.png	2024-01-26 15:27:05 +05:00
Andrej730	b8ad73668f	BBIM to print console errors in case IFC file is failed to load	2024-01-26 14:54:51 +05:00
Andrej730	b7a3dd4164	black format	2024-01-26 14:54:50 +05:00
Bruno Postle	566fd443db	IfcGit avoid leaving stray .git/config.lock files	2024-01-25 23:30:00 +00:00
Andrej730	51b5a507cf	shape builder docs	2024-01-25 16:46:38 +05:00
Andrej730	a44357dad5	shape builder polyline example and tests	2024-01-25 16:46:34 +05:00
Andrej730	8e792ebb50	UI for changing styles for representation items Example - https://imgur.com/a/SQh6rR2	2024-01-25 15:17:44 +05:00
Andrej730	352321364c	fix couple building docs errors / warnings	2024-01-24 16:38:53 +05:00
Andrej730	2ab32e41b2	shape builder docs fixes	2024-01-24 16:38:53 +05:00
Andrej730	3fbd9d7cdf	IFC4 Landscape Library Created IFC library with simple trees, shrubs and hedges - with both 2d and 3d representations. Example - https://i.imgur.com/pOjh1si.png Now it's available along with the furniture library when creating new project - https://i.imgur.com/Ho0B5Gn.png	2024-01-24 16:38:52 +05:00