New function to add ifc opening relationships

src/ifcblenderexport/blenderbim/bim/__init__.py

@@ -172,6 +172,7 @@ if bpy is not None:
         operator.CalculateEdgeLengths,
         operator.CalculateFaceAreas,
         operator.CalculateObjectVolumes,
+        operator.AddOpening,
         prop.StrProperty,
         prop.Variable,
         prop.Role,
@@ -216,7 +217,6 @@ if bpy is not None:
         ui.BIM_PT_documentation,
         ui.BIM_PT_bim,
         ui.BIM_PT_psets,
-        ui.BIM_PT_qto,
         ui.BIM_PT_classifications,
         ui.BIM_PT_document_information,
         ui.BIM_PT_constraints,
@@ -247,6 +247,8 @@ if bpy is not None:
         ui.BIM_PT_object_structural,
         ui.BIM_PT_camera,
         ui.BIM_PT_text,
+        ui.BIM_PT_modeling_utilities,
+        ui.BIM_PT_qto_utilities,
         ui.BIM_UL_generic,
         ui.BIM_UL_clash_sets,
         ui.BIM_UL_constraints,
@@ -298,6 +300,7 @@ if bpy is not None:
         bpy.types.Camera.BIMCameraProperties = bpy.props.PointerProperty(type=prop.BIMCameraProperties)
         bpy.types.TextCurve.BIMTextProperties = bpy.props.PointerProperty(type=prop.BIMTextProperties)
         bpy.types.Scene.CoveToolProperties = bpy.props.PointerProperty(type=covetool_prop.CoveToolProperties)
+        bpy.types.SCENE_PT_unit.append(ui.ifc_units)
 
     def unregister():
         for cls in reversed(classes):
@@ -316,3 +319,4 @@ if bpy is not None:
         del(bpy.types.Mesh.BIMMeshProperties)
         del(bpy.types.Camera.BIMCameraProperties)
         del(bpy.types.Camera.BIMTextProperties)
+        bpy.types.SCENE_PT_unit.remove(ui.ifc_units)

src/ifcblenderexport/blenderbim/bim/operator.py

@@ -3394,3 +3394,19 @@ class CalculateObjectVolumes(bpy.types.Operator):
             result += qto_calculator.get_volume(obj)
         bpy.context.scene.BIMProperties.qto_result = str(round(result, 3))
         return {'FINISHED'}
+
+
+class AddOpening(bpy.types.Operator):
+    bl_idname = 'bim.add_opening'
+    bl_label = 'Add Opening'
+
+    def execute(self, context):
+        opening = context.active_object
+        if context.selected_objects[0] != context.active_object:
+            obj = context.selected_objects[0]
+        else:
+            obj = context.selected_objects[1]
+        modifier = obj.modifiers.new('IfcOpeningElement', 'BOOLEAN')
+        modifier.operation = 'DIFFERENCE'
+        modifier.object = opening
+        return {'FINISHED'}

src/ifcblenderexport/blenderbim/bim/prop.py

@@ -1088,8 +1088,8 @@ class BIMProperties(PropertyGroup):
     ifc_patch_output: StringProperty(default='', name='IFC Patch Output IFC')
     ifc_patch_args: StringProperty(default='', name='Arguments')
     qto_result: StringProperty(default='', name='Qto Result')
-    area_unit: StringProperty(default='', name='Area Unit')
-    volume_unit: StringProperty(default='', name='Volume Unit')
+    area_unit: StringProperty(default='', name='IFC Area Unit')
+    volume_unit: StringProperty(default='', name='IFC Volume Unit')
 
 
 class BCFProperties(PropertyGroup):

src/ifcblenderexport/blenderbim/bim/ui.py

@@ -498,39 +498,6 @@ class BIM_PT_psets(Panel):
             row.operator('bim.remove_property_template', icon='X', text='').index = index
 
 
-class BIM_PT_qto(Panel):
-    bl_label = 'IFC Quantity Take-off'
-    bl_idname = 'BIM_PT_qto'
-    bl_options = {'DEFAULT_CLOSED'}
-    bl_space_type = 'PROPERTIES'
-    bl_region_type = 'WINDOW'
-    bl_context = 'scene'
-
-    def draw(self, context):
-        layout = self.layout
-        layout.use_property_split = True
-        props = context.scene.BIMProperties
-
-        row = layout.row()
-        layout.label(text="Units:")
-        row = layout.row()
-        row.prop(props, 'area_unit')
-        row = layout.row()
-        row.prop(props, 'volume_unit')
-
-        row = layout.row()
-        layout.label(text="Results:")
-        row = layout.row()
-        row.prop(props, 'qto_result', text='')
-
-        row = layout.row(align=True)
-        row.operator("bim.calculate_edge_lengths")
-        row = layout.row(align=True)
-        row.operator("bim.calculate_face_areas")
-        row = layout.row(align=True)
-        row.operator("bim.calculate_object_volumes")
-
-
 class BIM_PT_classifications(Panel):
     bl_label = 'IFC Classifications References'
     bl_idname = 'BIM_PT_classifications'
@@ -1839,3 +1806,53 @@ class BIM_PT_ifcclash(Panel):
 
             row = layout.row()
             row.operator('bim.select_ifc_clash_results')
+
+
+class BIM_PT_modeling_utilities(Panel):
+    bl_idname = "BIM_PT_modeling_utilities"
+    bl_label = "Architectural"
+    bl_space_type = 'VIEW_3D'
+    bl_region_type = "UI"
+    bl_category = 'BlenderBIM'
+
+    def draw(self, context):
+        layout = self.layout
+
+        row = layout.row(align=True)
+        row.operator("bim.add_opening")
+
+
+class BIM_PT_qto_utilities(Panel):
+    bl_idname = "BIM_PT_qto_utilities"
+    bl_label = "Quantity Take-off"
+    bl_space_type = 'VIEW_3D'
+    bl_region_type = "UI"
+    bl_category = 'BlenderBIM'
+
+    def draw(self, context):
+        layout = self.layout
+        props = context.scene.BIMProperties
+
+        row = layout.row()
+        layout.label(text="Results:")
+        row = layout.row()
+        row.prop(props, 'qto_result', text='')
+
+        row = layout.row(align=True)
+        row.operator("bim.calculate_edge_lengths")
+        row = layout.row(align=True)
+        row.operator("bim.calculate_face_areas")
+        row = layout.row(align=True)
+        row.operator("bim.calculate_object_volumes")
+
+
+def ifc_units(self, context):
+    scene = context.scene
+    props = context.scene.BIMProperties
+    layout = self.layout
+    layout.use_property_decorate = False
+    layout.use_property_split = True
+    row = layout.row()
+    row.prop(props, 'area_unit')
+    row = layout.row()
+    row.prop(props, 'volume_unit')