Fix bug where adding a representation to a type instance didn't share meshes

src/blenderbim/blenderbim/core/geometry.py

@@ -66,6 +66,7 @@ def add_representation(
     ifc.run("geometry.assign_representation", product=element, representation=representation)
 
     data = geometry.duplicate_object_data(obj)
+    geometry.change_object_data(obj, data, is_global=True)
     name = geometry.get_representation_name(representation)
     geometry.rename_object(data, name)
     geometry.link(representation, data)

src/blenderbim/blenderbim/tool/geometry.py

@@ -63,8 +63,7 @@ class Geometry(blenderbim.core.tool.Geometry):
 
     @classmethod
     def duplicate_object_data(cls, obj):
-        obj.data = obj.data.copy()
-        return obj.data
+        return obj.data.copy()
 
     @classmethod
     def get_cartesian_point_coordinate_offset(cls, obj):

src/blenderbim/test/bim/feature/geometry.feature

@@ -18,10 +18,29 @@ Scenario: Add representation
     And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
     And I press "bim.assign_class"
     And the object "IfcWall/Cube" is selected
+    Then the object "IfcWall/Cube" has a "Tessellation" representation of "Model/Body/MODEL_VIEW"
     When the variable "context" is "{ifc}.by_type('IfcGeometricRepresentationSubContext')[-1].id()"
     And I set "scene.BIMProperties.contexts" to "{context}"
     And I press "bim.add_representation"
-    Then nothing happens
+    Then the object "IfcWall/Cube" has a "Annotation2D" representation of "Plan/Annotation/PLAN_VIEW"
+
+Scenario: Add representation - add a new representation to a typed instance
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_product" to "IfcElementType"
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWallType"
+    And I press "bim.assign_class"
+    And I press "bim.add_type_instance"
+    And I press "bim.add_type_instance"
+    Then the object "IfcWall/Instance" has a "MappedRepresentation" representation of "Model/Body/MODEL_VIEW"
+    And the object "IfcWall/Instance.001" has a "MappedRepresentation" representation of "Model/Body/MODEL_VIEW"
+    When the object "IfcWall/Instance" is selected
+    And the variable "context" is "{ifc}.by_type('IfcGeometricRepresentationSubContext')[-1].id()"
+    And I set "scene.BIMProperties.contexts" to "{context}"
+    And I press "bim.add_representation"
+    Then the object "IfcWall/Instance" has a "MappedRepresentation" representation of "Plan/Annotation/PLAN_VIEW"
+    And the object "IfcWall/Instance.001" has a "MappedRepresentation" representation of "Plan/Annotation/PLAN_VIEW"
 
 Scenario: Switch representation
     Given an empty IFC project

src/blenderbim/test/core/test_geometry.py

@@ -76,6 +76,7 @@ class TestAddRepresentation:
 
         # Update mesh
         geometry.duplicate_object_data("obj").should_be_called().will_return("data")
+        geometry.change_object_data("obj", "data", is_global=True).should_be_called()
         geometry.get_representation_name("representation").should_be_called().will_return("name")
         geometry.rename_object("data", "name").should_be_called()
         geometry.link("representation", "data").should_be_called()
@@ -124,6 +125,7 @@ class TestAddRepresentation:
 
         # Update mesh
         geometry.duplicate_object_data("obj").should_be_called().will_return("data")
+        geometry.change_object_data("obj", "data", is_global=True).should_be_called()
         geometry.get_representation_name("representation").should_be_called().will_return("name")
         geometry.rename_object("data", "name").should_be_called()
         geometry.link("representation", "data").should_be_called()

src/blenderbim/test/tool/test_geometry.py

@@ -112,9 +112,9 @@ class TestDuplicateObjectData(NewFile):
     def test_run(self):
         data = bpy.data.meshes.new("Mesh")
         obj = bpy.data.objects.new("Object", data)
-        assert subject.duplicate_object_data(obj) == obj.data
-        assert obj.data != data
-        assert isinstance(obj.data, bpy.types.Mesh)
+        new_data = subject.duplicate_object_data(obj)
+        assert obj.data == data
+        assert isinstance(new_data, bpy.types.Mesh)
 
 
 class TestGetObjectData(NewFile):