Add dumb opening feature

src/ifcblenderexport/blenderbim/bim/module/model/opening.py

@@ -0,0 +1,40 @@
+import bpy
+import bmesh
+from bpy.types import Operator
+from bpy.props import FloatVectorProperty, FloatProperty, IntProperty
+from bpy_extras.object_utils import AddObjectHelper, object_data_add
+from mathutils import Vector
+
+def add_object(self, context):
+    bm = bmesh.new()
+    bmesh.ops.create_cube(bm, size=self.size)
+    bm.verts.ensure_lookup_table()
+    bm.edges.ensure_lookup_table()
+    bm.faces.ensure_lookup_table()
+    mesh = bpy.data.meshes.new(name="Dumb Opening")
+    bm.to_mesh(mesh)
+    bm.free()
+    obj = object_data_add(context, mesh, operator=self)
+    obj.name = 'IfcOpening/Dumb Opening'
+    obj.display_type = 'WIRE'
+    attribute = obj.BIMObjectProperties.attributes.add()
+    attribute.name = 'PredefinedType'
+    attribute.string_value = 'OPENING'
+
+
+class BIM_OT_add_object(Operator, AddObjectHelper):
+    bl_idname = "mesh.add_opening"
+    bl_label = "Dumb Opening"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    size: FloatProperty(name='Size', default=2)
+
+    def execute(self, context):
+        add_object(self, context)
+        return {'FINISHED'}
+
+
+def add_object_button(self, context):
+    self.layout.operator(
+        BIM_OT_add_object.bl_idname,
+        icon='PLUGIN')