Fix #1287. Back to IfcOpenShell for booleans. Optional conversion to Blender if the user decides to do so.

src/ifcblenderexport/blenderbim/bim/import_ifc.py

@@ -278,7 +278,6 @@ class IfcImporter:
         self.diff = None
         self.file = None
         self.settings = ifcopenshell.geom.settings()
-        self.settings.set(self.settings.DISABLE_OPENING_SUBTRACTIONS, True)
         self.settings.set_deflection_tolerance(self.ifc_import_settings.deflection_tolerance)
         self.settings.set_angular_tolerance(self.ifc_import_settings.angular_tolerance)
         if self.ifc_import_settings.should_import_curves:
@@ -347,17 +346,15 @@ class IfcImporter:
         self.process_element_filter()
         self.profile_code("Process element filter")
         # TODO: Deprecate
-        #self.parse_native_elements()
-        #self.profile_code("Parsing native elements")
+        # self.parse_native_elements()
+        # self.profile_code("Parsing native elements")
         self.create_grids()
         self.profile_code("Creating grids")
         # TODO: Deprecate
-        #self.create_native_products()
-        #self.profile_code("Creating native products")
+        # self.create_native_products()
+        # self.profile_code("Creating native products")
         self.create_products()
         self.profile_code("Creating meshified products")
-        self.relate_openings()
-        self.profile_code("Relating openings")
         self.place_objects_in_spatial_tree()
         self.profile_code("Placing objects in spatial tree")
         if self.ifc_import_settings.should_merge_by_class:
@@ -1231,16 +1228,6 @@ class IfcImporter:
                 objects_to_purge.append(obj)
         bpy.ops.object.delete({"selected_objects": objects_to_purge})
 
-    def relate_openings(self):
-        for global_id, opening in self.openings.items():
-            building_element_global_id = self.file.by_guid(global_id).VoidsElements[0].RelatingBuildingElement.GlobalId
-            if building_element_global_id not in self.added_data:
-                continue
-            building_element = self.added_data[building_element_global_id]
-            modifier = building_element.modifiers.new("IfcOpeningElement", "BOOLEAN")
-            modifier.operation = "DIFFERENCE"
-            modifier.object = opening
-
     def place_objects_in_spatial_tree(self):
         for ifc_definition_id, obj in IfcStore.id_map.items():
             self.place_object_in_spatial_tree(self.file.by_id(ifc_definition_id), obj)
@@ -1380,9 +1367,7 @@ class IfcImporter:
                 representation_id = int(re.sub(r"\D", "", representation_id))
             representation = self.file.by_id(representation_id)
             context_id = representation.ContextOfItems.id() if hasattr(representation, "ContextOfItems") else 0
-            mesh = bpy.data.meshes.new(
-                "{}/{}".format(context_id, geometry.id)
-            )
+            mesh = bpy.data.meshes.new("{}/{}".format(context_id, representation_id))
 
             props = bpy.context.scene.BIMGeoreferenceProperties
             if props.has_blender_offset and props.blender_offset_type == "CARTESIAN_POINT":

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

@@ -13,6 +13,7 @@ from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim import import_ifc
 from blenderbim.bim.module.geometry.data import Data
 from blenderbim.bim.module.context.data import Data as ContextData
+from blenderbim.bim.module.void.data import Data as VoidData
 
 
 def get_box_context_id():
@@ -142,13 +143,14 @@ class SwitchRepresentation(bpy.types.Operator):
     bl_idname = "bim.switch_representation"
     bl_label = "Switch Representation"
     ifc_definition_id: bpy.props.IntProperty()
+    disable_opening_subtractions: bpy.props.BoolProperty()
 
     def execute(self, context):
         self.obj = bpy.context.active_object
 
         self.file = IfcStore.get_file()
-        context_of_items = self.file.by_id(self.ifc_definition_id).ContextOfItems
-        self.mesh_name = "{}/{}".format(context_of_items.id(), self.ifc_definition_id)
+        self.context_of_items = self.file.by_id(self.ifc_definition_id).ContextOfItems
+        self.mesh_name = "{}/{}".format(self.context_of_items.id(), self.ifc_definition_id)
 
         mesh = bpy.data.meshes.get(self.mesh_name)
         if mesh:
@@ -162,8 +164,18 @@ class SwitchRepresentation(bpy.types.Operator):
         ifc_import_settings = import_ifc.IfcImportSettings.factory(bpy.context, IfcStore.path, logger)
         element = self.file.by_id(self.obj.BIMObjectProperties.ifc_definition_id)
         settings = ifcopenshell.geom.settings()
-        settings.set(settings.INCLUDE_CURVES, True)
-        shape = ifcopenshell.geom.create_shape(settings, self.file.by_id(self.ifc_definition_id))
+
+        if self.context_of_items.ContextIdentifier != "Body":
+            settings.set(settings.INCLUDE_CURVES, True)
+
+        if self.disable_opening_subtractions and self.context_of_items.ContextIdentifier == "Body":
+            settings.set(settings.DISABLE_OPENING_SUBTRACTIONS, True)
+            shape = ifcopenshell.geom.create_shape(settings, self.file.by_id(self.ifc_definition_id))
+        else:
+            shape = ifcopenshell.geom.create_shape(
+                settings, self.file.by_id(self.obj.BIMObjectProperties.ifc_definition_id)
+            )
+
         ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
         ifc_importer.file = self.file
         mesh = ifc_importer.create_mesh(element, shape)
@@ -173,6 +185,20 @@ class SwitchRepresentation(bpy.types.Operator):
         material_creator = import_ifc.MaterialCreator(ifc_import_settings, ifc_importer)
         material_creator.create(element, self.obj, mesh)
 
+        if self.disable_opening_subtractions and self.context_of_items.ContextIdentifier == "Body":
+            if self.obj.BIMObjectProperties.ifc_definition_id not in VoidData.products:
+                VoidData.load(self.obj.BIMObjectProperties.ifc_definition_id)
+            for opening_id in VoidData.products[self.obj.BIMObjectProperties.ifc_definition_id]:
+                if opening_id in IfcStore.id_map:
+                    opening = IfcStore.id_map[opening_id]
+                    modifier = self.obj.modifiers.new("IfcOpeningElement", "BOOLEAN")
+                    modifier.operation = "DIFFERENCE"
+                    modifier.object = opening
+        else:
+            for modifier in self.obj.modifiers:
+                if modifier.type == "BOOLEAN" and "IfcOpeningElement" in modifier.name:
+                    self.obj.modifiers.remove(modifier)
+
 
 class RemoveRepresentation(bpy.types.Operator):
     bl_idname = "bim.remove_representation"

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

@@ -38,7 +38,9 @@ class BIM_PT_representations(Panel):
             row.label(text=representation["ContextOfItems"]["ContextIdentifier"])
             row.label(text=representation["ContextOfItems"]["TargetView"])
             row.label(text=representation["RepresentationType"])
-            row.operator("bim.switch_representation", icon="OUTLINER_DATA_MESH", text="").ifc_definition_id = ifc_definition_id
+            op = row.operator("bim.switch_representation", icon="OUTLINER_DATA_MESH", text="")
+            op.ifc_definition_id = ifc_definition_id
+            op.disable_opening_subtractions = False
             row.operator("bim.remove_representation", icon="X", text="").ifc_definition_id = ifc_definition_id
 
 
@@ -65,11 +67,20 @@ class BIM_PT_mesh(Panel):
         props = context.active_object.data.BIMMeshProperties
 
         row = layout.row()
-        row.operator("bim.get_representation_ifc_parameters")
+        row.operator("bim.map_representation")
+
+        row = layout.row(align=True)
+        op = row.operator("bim.switch_representation", text="Bake Voids", icon="SELECT_SUBTRACT")
+        op.ifc_definition_id = props.ifc_definition_id
+        op.disable_opening_subtractions = False
+        op = row.operator("bim.switch_representation", text="Dynamic Voids", icon="SELECT_INTERSECT")
+        op.ifc_definition_id = props.ifc_definition_id
+        op.disable_opening_subtractions = True
+
         row = layout.row()
         row.operator("bim.update_mesh_representation")
         row = layout.row()
-        row.operator("bim.map_representation")
+        row.operator("bim.get_representation_ifc_parameters")
         for index, ifc_parameter in enumerate(props.ifc_parameters):
             row = layout.row(align=True)
             row.prop(ifc_parameter, "name", text="")