#1153 Fix bugs with importing existing annotations

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -1509,9 +1509,10 @@ class IfcImporter:
             return self.structural_member_collection.objects.link(obj)
         elif element.is_a("IfcStructuralConnection"):
             return self.structural_connection_collection.objects.link(obj)
-        elif element.is_a("IfcAnnotation") and self.is_drawing_annotation(element):
-            group = [r for r in element.HasAssignments if r.is_a("IfcRelAssignsToGroup")][0].RelatingGroup
-            return self.collections[group.GlobalId].objects.link(obj)
+        elif element.is_a("IfcAnnotation"):
+            group = self.get_drawing_group(element)
+            if group:
+                return self.collections[group.GlobalId].objects.link(obj)
 
         container = ifcopenshell.util.element.get_container(element)
         if container:
@@ -1531,32 +1532,16 @@ class IfcImporter:
         return element.ObjectType in [
             "DIMENSION",
             "EQUAL_DIMENSION",
-            "MISC",
             "PLAN_LEVEL",
             "SECTION_LEVEL",
             "STAIR_ARROW",
             "TEXT_LEADER",
         ]
 
-    def is_drawing_annotation(self, element):
-        return element.ObjectType in [
-            "BREAKLINE",
-            "DIMENSION",
-            "DRAWING",
-            "EQUAL_DIMENSION",
-            "GRID",
-            "HIDDEN_LINE",
-            "MISC",
-            "PLAN_LEVEL",
-            "SECTION_LEVEL",
-            "STAIR_ARROW",
-            "TEXT",
-            "TEXT_LEADER",
-            "LEADER",
-            "HATCH",
-            "LINEWORK",
-            "AREA",
-        ]
+    def get_drawing_group(self, element):
+        for rel in element.HasAssignments or []:
+            if rel.is_a("IfcRelAssignsToGroup"):
+                return rel.RelatingGroup
 
     def get_element_matrix(self, element):
         result = ifcopenshell.util.placement.get_local_placement(element.ObjectPlacement)

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -442,13 +442,15 @@ class CreateDrawing(bpy.types.Operator):
         svg_writer.camera_height = height
         svg_writer.camera_projection = tuple(camera.matrix_world.to_quaternion() @ Vector((0, 0, -1)))
 
-        for obj in camera.users_collection[0].objects:
-            if "IfcAnnotation/" not in obj.name:
+        for element in tool.Drawing.get_group_elements(tool.Drawing.get_drawing_group(self.camera_element)):
+            if not element.is_a("IfcAnnotation"):
+                continue
+            obj = tool.Ifc.get_object(element)
+            if not obj:
                 continue
-            element = tool.Ifc.get_entity(obj)
             if element.ObjectType == "GRID":
                 svg_writer.annotations.setdefault("grid_objs", []).append(obj)
-            elif obj.type == "CAMERA":
+            elif element.ObjectType == "DRAWING":
                 continue
             elif element.ObjectType == "TEXT_LEADER":
                 svg_writer.annotations.setdefault("leader_objs", []).append(obj)