closes #5086: a preference to assign which classes display as wireframe upon opening the IFC file

src/bonsai/bonsai/bim/import_ifc.py

@@ -203,6 +203,8 @@ class IfcImporter:
         self.progress = 0
 
         self.material_creator = MaterialCreator(ifc_import_settings, self)
+        classes_to_wireframe_str = bpy.context.scene.DocProperties.classes_to_wireframe
+        self.classes_to_wireframe_list = [word.strip() for word in classes_to_wireframe_str.split(",")]
 
     def profile_code(self, message: str) -> None:
         if not self.time:
@@ -815,6 +817,10 @@ class IfcImporter:
         obj = bpy.data.objects.new(tool.Loader.get_name(element), mesh)
         self.link_element(element, obj)
 
+        for ifcclass in self.classes_to_wireframe_list:
+            if element.is_a(ifcclass):
+                obj.display_type = 'WIRE'
+
         if shape:
             # We use numpy here because Blender mathutils.Matrix is not accurate enough
             mat = np.array(shape.transformation.matrix).reshape((4, 4), order="F")

src/bonsai/bonsai/bim/module/drawing/prop.py

@@ -402,6 +402,11 @@ class DocProperties(PropertyGroup):
     magic_font_scale: bpy.props.FloatProperty(default=0.004118616, name="Font Scale Factor")
     imperial_precision: StringProperty(default="1/32", name="Imperial Precision")
     tolerance: bpy.props.FloatProperty(default=0.00001, name="A tolerance used when selecting objects")
+    classes_to_wireframe: StringProperty(
+        default="IfcVirtualelement", 
+        name="Classes to Wireframe", 
+        description = "Upon import, these classes will display as wireframe.\nEx: IfcVirtualelement, IfcSpace"
+        )
 
 
 class BIMCameraProperties(PropertyGroup):

src/bonsai/bonsai/bim/ui.py

@@ -383,6 +383,8 @@ class BIM_ADDON_preferences(bpy.types.AddonPreferences):
         row.prop(context.scene.DocProperties, "imperial_precision")
         row = self.layout.row()
         row.prop(context.scene.DocProperties, "tolerance")
+        row = self.layout.row()
+        row.prop(context.scene.DocProperties, "classes_to_wireframe")       
 
 
 # Scene panel groups