Copying parametric geometry from any source now attempts to preserve parametric geometry when possible.

src/blenderbim/blenderbim/tool/geometry.py

@@ -61,24 +61,6 @@ class Geometry(blenderbim.core.tool.Geometry):
         obj.data = obj.data.copy()
         return obj.data
 
-    @classmethod
-    def get_object_data(cls, obj):
-        return obj.data
-
-    @classmethod
-    def get_object_materials_without_styles(cls, obj):
-        return [
-            s.material for s in obj.material_slots if s.material and not s.material.BIMMaterialProperties.ifc_style_id
-        ]
-
-    @classmethod
-    def get_representation_data(cls, representation):
-        return bpy.data.meshes.get(cls.get_representation_name(representation))
-
-    @classmethod
-    def get_representation_name(cls, representation):
-        return f"{representation.ContextOfItems.id()}/{representation.id()}"
-
     @classmethod
     def get_cartesian_point_coordinate_offset(cls, obj):
         props = bpy.context.scene.BIMGeoreferenceProperties
@@ -91,6 +73,50 @@ class Geometry(blenderbim.core.tool.Geometry):
                 )
             )
 
+    @classmethod
+    def get_ifc_representation_class(cls, element, representation):
+        material = ifcopenshell.util.element.get_material(element)
+        if material and material.is_a("IfcMaterialProfileSetUsage"):
+            return "IfcExtrudedAreaSolid/IfcMaterialProfileSetUsage"
+
+        extruded_areas = [e for e in tool.Ifc.get().traverse(representation) if e.is_a() == "IfcExtrudedAreaSolid"]
+
+        if len(extruded_areas) != 1:
+            return  # It's too complex for us to derive topologically right now
+
+        profile_def = extruded_areas[0].SweptArea
+
+        if profile_def.is_a() == "IfcRectangleProfileDef":
+            return "IfcExtrudedAreaSolid/IfcRectangleProfileDef"
+        elif profile_def.is_a() == "IfcCircleProfileDef":
+            return "IfcExtrudedAreaSolid/IfcCircleProfileDef"
+        return "IfcExtrudedAreaSolid/IfcArbitraryProfileDefWithVoids"
+
+    @classmethod
+    def get_object_data(cls, obj):
+        return obj.data
+
+    @classmethod
+    def get_object_materials_without_styles(cls, obj):
+        return [
+            s.material for s in obj.material_slots if s.material and not s.material.BIMMaterialProperties.ifc_style_id
+        ]
+
+    @classmethod
+    def get_profile_set_usage(cls, element):
+        material = ifcopenshell.util.element.get_material(element)
+        if material:
+            if material.is_a("IfcMaterialProfileSetUsage"):
+                return material
+
+    @classmethod
+    def get_representation_data(cls, representation):
+        return bpy.data.meshes.get(cls.get_representation_name(representation))
+
+    @classmethod
+    def get_representation_name(cls, representation):
+        return f"{representation.ContextOfItems.id()}/{representation.id()}"
+
     @classmethod
     def get_total_representation_items(cls, obj):
         return max(1, len(obj.material_slots))

src/blenderbim/blenderbim/tool/root.py

@@ -49,16 +49,29 @@ class Root(blenderbim.core.tool.Root):
         return ifcopenshell.util.element.get_type(element)
 
     @classmethod
-    def get_object_context(cls, obj):
+    def get_object_representation(cls, obj):
         if obj.data and obj.data.BIMMeshProperties.ifc_definition_id:
-            return tool.Ifc.get().by_id(obj.data.BIMMeshProperties.ifc_definition_id).ContextOfItems
+            return tool.Ifc.get().by_id(obj.data.BIMMeshProperties.ifc_definition_id)
+
+    @classmethod
+    def get_representation_context(cls, representation):
+        return representation.ContextOfItems
 
     @classmethod
     def is_opening_element(cls, element):
         return element.is_a("IfcOpeningElement")
 
     @classmethod
-    def run_geometry_add_representation(cls, obj=None, context=None):
+    def run_geometry_add_representation(
+        cls, obj=None, context=None, ifc_representation_class=None, profile_set_usage=None
+    ):
         return blenderbim.core.geometry.add_representation(
-            tool.Ifc, tool.Geometry, tool.Style, tool.Surveyor, obj=obj, context=context
+            tool.Ifc,
+            tool.Geometry,
+            tool.Style,
+            tool.Surveyor,
+            obj=obj,
+            context=context,
+            ifc_representation_class=ifc_representation_class,
+            profile_set_usage=profile_set_usage,
         )

src/blenderbim/blenderbim/tool/spatial.py

@@ -93,7 +93,7 @@ class Spatial(blenderbim.core.tool.Spatial):
 
     @classmethod
     def run_root_copy_class(cls, obj=None):
-        return blenderbim.core.root.copy_class(tool.Ifc, tool.Collector, tool.Root, obj=obj)
+        return blenderbim.core.root.copy_class(tool.Ifc, tool.Collector, tool.Geometry, tool.Root, obj=obj)
 
     @classmethod
     def run_spatial_assign_container(cls, structure_obj=None, element_obj=None):