Array children now follow their parent with a "child-of" constraint #3492

src/blenderbim/blenderbim/bim/module/model/array.py

@@ -134,6 +134,8 @@ class EditArray(bpy.types.Operator, tool.Ifc.Operator):
         pset = tool.Ifc.get().by_id(pset["id"])
         data = json.dumps(data)
         ifcopenshell.api.run("pset.edit_pset", tool.Ifc.get(), pset=pset, properties={"Data": data})
+
+        tool.Blender.Modifier.Array.constrain_children_to_parent(element)
         return {"FINISHED"}
 
 

src/blenderbim/blenderbim/tool/blender.py

@@ -522,6 +522,16 @@ class Blender:
             return cls.is_stair(element) or cls.is_door(element) or cls.is_window(element)
 
         class Array:
+            @classmethod
+            def constrain_children_to_parent(cls, parent_element):
+                parent_obj = tool.Ifc.get_object(parent_element)
+                children = cls.get_all_children_objects(parent_element)
+                for child in children:
+                    constraint = next(
+                        (c for c in child.constraints if c.type == "CHILD_OF"), None
+                    ) or child.constraints.new("CHILD_OF")
+                    constraint.target = parent_obj
+
             @classmethod
             def get_all_objects(cls, parent_element):
                 parent_obj = tool.Ifc.get_object(parent_element)