Add new feature to auto-clean mesh on import

src/ifcblenderexport/blenderbim/import_ifc.py

@@ -168,6 +168,8 @@ class IfcImporter():
             self.merge_by_class()
         elif self.ifc_import_settings.should_merge_by_material:
             self.merge_by_material()
+        if self.ifc_import_settings.should_clean_mesh:
+            self.clean_mesh()
 
     def auto_set_workarounds(self):
         applications = self.file.by_type('IfcApplication')
@@ -366,6 +368,17 @@ class IfcImporter():
             context_override['selected_objects'] = context_override['selected_editable_objects'] = objs
             bpy.ops.object.join(context_override)
 
+    def clean_mesh(self):
+        for obj in self.added_objects:
+            obj.select_set(True)
+        bpy.context.view_layer.objects.active = obj
+        context_override = {}
+        bpy.ops.object.editmode_toggle(context_override)
+        bpy.ops.mesh.remove_doubles(context_override)
+        bpy.ops.mesh.tris_convert_to_quads(context_override)
+        bpy.ops.mesh.normals_make_consistent(context_override)
+        bpy.ops.object.editmode_toggle(context_override)
+
     def add_product_psets(self, element, obj):
         if not hasattr(element, 'IsDefinedBy') or not element.IsDefinedBy:
             return
@@ -724,4 +737,5 @@ class IfcImportSettings:
         self.should_merge_by_class = False
         self.should_merge_by_material = False
         self.should_import_aggregates = True
+        self.should_clean_mesh = True
         self.diff_file = None

src/ifcblenderexport/blenderbim/operator.py

@@ -104,6 +104,7 @@ class ImportIFC(bpy.types.Operator, ImportHelper):
         ifc_import_settings.should_import_aggregates = bpy.context.scene.BIMProperties.import_should_import_aggregates
         ifc_import_settings.should_merge_by_class = bpy.context.scene.BIMProperties.import_should_merge_by_class
         ifc_import_settings.should_merge_by_material = bpy.context.scene.BIMProperties.import_should_merge_by_material
+        ifc_import_settings.should_clean_mesh = bpy.context.scene.BIMProperties.import_should_clean_mesh
         ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
         ifc_importer.execute()
         ifc_import_settings.logger.info('Import finished in {:.2f} seconds'.format(time.time() - start))

src/ifcblenderexport/blenderbim/prop.py

@@ -385,6 +385,7 @@ class BIMProperties(PropertyGroup):
     import_should_import_aggregates: BoolProperty(name="Import Aggregates", default=True)
     import_should_merge_by_class: BoolProperty(name="Import and Merge by Class", default=False)
     import_should_merge_by_material: BoolProperty(name="Import and Merge by Material", default=False)
+    import_should_clean_mesh: BoolProperty(name="Import and Clean Mesh", default=True)
     qa_reject_element_reason: StringProperty(name="Element Rejection Reason")
     person: EnumProperty(items=getPersons, name="Person")
     organisation: EnumProperty(items=getOrganisations, name="Organisation")

src/ifcblenderexport/blenderbim/ui.py

@@ -651,6 +651,8 @@ class BIM_PT_mvd(Panel):
         row.prop(bim_properties, 'import_should_merge_by_class')
         row = layout.row()
         row.prop(bim_properties, 'import_should_merge_by_material')
+        row = layout.row()
+        row.prop(bim_properties, 'import_should_clean_mesh')
 
         layout.label(text='Vendor Workarounds:')