Model module walls/slabs/products/mep now use the default container too.

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

@@ -243,7 +243,6 @@ class MEPGenerator:
 
     def setup_ports(self, obj):
         self.file = tool.Ifc.get()
-        self.collection = bpy.context.view_layer.active_layer_collection.collection
 
         segment = tool.Ifc.get_entity(obj)
         representation = ifcopenshell.util.representation.get_representation(segment, "Model", "Body", "MODEL_VIEW")

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

@@ -192,9 +192,9 @@ class AddConstrTypeInstance(bpy.types.Operator):
 
         obj.location = context.scene.cursor.location
 
-        collection = context.view_layer.active_layer_collection.collection
+        self.container_obj = None
-        collection.objects.link(obj)
+        if container := tool.Root.get_default_container():
-        collection_obj = collection.BIMCollectionProperties.obj
+            self.container_obj = tool.Ifc.get_object(container)
 
         bpy.ops.bim.assign_class(obj=obj.name, ifc_class=instance_class)
         tool.Blender.remove_data_block(mesh)  # Remove "Instance" mesh
@@ -248,11 +248,11 @@ class AddConstrTypeInstance(bpy.types.Operator):
                 # TODO For now we are hardcoding windows and doors as a prototype
                 bpy.ops.bim.add_filled_opening(voided_obj=building_obj.name, filling_obj=obj.name)
         else:
-            if collection_obj and tool.Ifc.get_entity(collection_obj):
+            if self.container_obj:
                 if props.rl_mode == "BOTTOM":
-                    obj.location.z = collection_obj.location.z - tool.Blender.get_object_bounding_box(obj)["min_z"]
+                    obj.location.z = self.container_obj.location.z - tool.Blender.get_object_bounding_box(obj)["min_z"]
                 elif props.rl_mode == "CONTAINER":
-                    obj.location.z = collection_obj.location.z
+                    obj.location.z = self.container_obj.location.z
                 elif props.rl_mode == "CURSOR":
                     pass
 
@@ -274,11 +274,8 @@ class AddConstrTypeInstance(bpy.types.Operator):
         return {"FINISHED"}
 
     def set_flow_segment_rl(self, obj):
-        collection = bpy.context.view_layer.active_layer_collection.collection
+        if self.container_obj:
-        collection_obj = collection.BIMCollectionProperties.obj
+            obj.location[2] = self.container_obj.location[2] + bpy.context.scene.BIMModelProperties.rl2
-
-        if collection_obj and tool.Ifc.get_entity(collection_obj):
-            obj.location[2] = collection_obj.location[2] + bpy.context.scene.BIMModelProperties.rl2
 
     @staticmethod
     def generate_layered_element(ifc_class: str, relating_type: ifcopenshell.entity_instance) -> bool:

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

@@ -31,7 +31,6 @@ import blenderbim.core.type
 import blenderbim.core.geometry
 import blenderbim.core.root
 import blenderbim.tool as tool
-from math import radians
 from mathutils import Vector, Matrix
 from blenderbim.bim.module.geometry.helper import Helper
 from blenderbim.bim.module.model.decorator import ProfileDecorator
@@ -137,8 +136,10 @@ class DumbSlabGenerator:
         )
 
         props = bpy.context.scene.BIMModelProperties
-        self.collection = bpy.context.view_layer.active_layer_collection.collection
+        self.container = None
-        self.collection_obj = self.collection.BIMCollectionProperties.obj
+        if container := tool.Root.get_default_container():
+            self.container = container
+            self.container_obj = tool.Ifc.get_object(container)
         self.depth = sum(thicknesses) * unit_scale
         self.width = 3
         self.length = 3
@@ -161,13 +162,12 @@ class DumbSlabGenerator:
 
         matrix_world = Matrix()
         matrix_world.translation = self.location
-        if self.collection_obj and self.collection_obj.BIMObjectProperties.ifc_definition_id:
+        if self.container_obj:
-            matrix_world.translation.z = self.collection_obj.location.z - self.depth
+            matrix_world.translation.z = self.container_obj.location.z - self.depth
         else:
             matrix_world.translation.z -= self.depth
         obj.matrix_world = Matrix.Rotation(self.x_angle, 4, "X") @ matrix_world
         bpy.context.view_layer.update()
-        self.collection.objects.link(obj)
 
         element = blenderbim.core.root.assign_class(
             tool.Ifc,

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

@@ -34,7 +34,7 @@ import blenderbim.core.root
 import blenderbim.core.geometry
 import blenderbim.tool as tool
 from blenderbim.bim.ifc import IfcStore
-from math import pi, sin, cos, degrees, radians
+from math import pi, sin, cos, degrees
 from mathutils import Vector, Matrix
 from blenderbim.bim.module.model.opening import FilledOpeningGenerator
 from typing import Optional
@@ -449,8 +449,10 @@ class DumbWallGenerator:
         self.axis_context = ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Plan", "Axis", "GRAPH_VIEW")
 
         props = bpy.context.scene.BIMModelProperties
-        self.collection = bpy.context.view_layer.active_layer_collection.collection
+        self.container = None
-        self.collection_obj = self.collection.BIMCollectionProperties.obj
+        if container := tool.Root.get_default_container():
+            self.container = container
+            self.container_obj = tool.Ifc.get_object(container)
         self.width = self.layers["thickness"]
         self.height = props.extrusion_depth
         self.length = props.length
@@ -540,11 +542,12 @@ class DumbWallGenerator:
     def derive_from_cursor(self):
         RAYCAST_PRECISION = 0.01
         self.location = bpy.context.scene.cursor.location
-        if self.collection:
+        if self.container:
-            for sibling_obj in self.collection.objects:
+            for subelement in ifcopenshell.util.element.get_decomposition(self.container):
-                if not isinstance(sibling_obj.data, bpy.types.Mesh):
+                if not subelement.is_a("IfcWall"):
                     continue
-                if "IfcWall" not in sibling_obj.name:
+                sibling_obj = tool.Ifc.get_object(subelement)
+                if not sibling_obj or not isinstance(sibling_obj.data, bpy.types.Mesh):
                     continue
                 inv_obj_matrix = sibling_obj.matrix_world.inverted()
                 local_location = inv_obj_matrix @ self.location
@@ -594,11 +597,10 @@ class DumbWallGenerator:
 
         matrix_world = Matrix.Rotation(self.rotation, 4, "Z")
         matrix_world.translation = self.location
-        if self.collection_obj and self.collection_obj.BIMObjectProperties.ifc_definition_id:
+        if self.container_obj:
-            matrix_world.translation.z = self.collection_obj.location.z + props.rl1
+            matrix_world.translation.z = self.container_obj.location.z + props.rl1
         obj.matrix_world = matrix_world
         bpy.context.view_layer.update()
-        self.collection.objects.link(obj)
 
         element = blenderbim.core.root.assign_class(
             tool.Ifc,