Create legacy features to export materials into broken BIM programs like Revit

src/ifcblenderexport/io_export_ifc/export_ifc.py

@@ -618,9 +618,10 @@ class IfcParser():
             if not object.data:
                 continue
             for slot in object.material_slots:
-                if slot.material.name in results \
+                if not self.ifc_export_settings.should_export_all_materials_as_styled_items:
-                    or slot.link == 'DATA':
+                    if slot.material.name in results \
-                    continue
+                        or slot.link == 'DATA':
+                        continue
                 results.append({
                     'ifc': None,
                     'raw': slot.material,
@@ -1101,7 +1102,10 @@ class IfcExporter():
         if item['raw'].BIMMaterialProperties.is_external:
             styles.append(self.file.create_entity('IfcExternallyDefinedSurfaceStyle',
                 **self.get_material_external_definition(item['raw'])))
-        surface_style = self.file.createIfcSurfaceStyle(None, 'BOTH', styles)
+        # Name is filled out because Revit treats this incorrectly as the material name
+        surface_style = self.file.createIfcSurfaceStyle(item['attributes']['Name'], 'BOTH', styles)
+        if self.ifc_export_settings.should_use_presentation_style_assignment:
+            surface_style = self.file.createIfcPresentationStyleAssignment([surface_style])
         return self.file.createIfcStyledItem(representation_item, [surface_style], item['attributes']['Name'])
 
     def create_materials(self):
@@ -1654,6 +1658,8 @@ class IfcExportSettings:
         self.subcontexts = ['Axis', 'FootPrint', 'Reference', 'Body', 'Clearance', 'CoG', 'SurveyPoints']
         self.generated_subcontexts = ['Box']
         self.target_views = ['GRAPH_VIEW', 'SKETCH_VIEW', 'MODEL_VIEW', 'PLAN_VIEW', 'REFLECTED_PLAN_VIEW', 'SECTION_VIEW', 'ELEVATION_VIEW', 'USERDEFINED', 'NOTDEFINED']
+        self.should_export_all_materials_as_styled_items = False
+        self.should_use_presentation_style_assignment = False
         # TODO make this configurable via UI
         self.context_tree = self.build_context_tree()
 

src/ifcblenderexport/io_export_ifc/operator.py

@@ -32,6 +32,8 @@ class ExportIFC(bpy.types.Operator):
         ifc_export_settings.schema_dir = bpy.context.scene.BIMProperties.schema_dir
         ifc_export_settings.output_file = bpy.path.ensure_ext(self.filepath, '.ifc')
         ifc_export_settings.has_representations = bpy.context.scene.BIMProperties.export_has_representations
+        ifc_export_settings.should_export_all_materials_as_styled_items = bpy.context.scene.BIMProperties.export_should_export_all_materials_as_styled_items
+        ifc_export_settings.should_use_presentation_style_assignment = bpy.context.scene.BIMProperties.export_should_use_presentation_style_assignment
         ifc_parser = export_ifc.IfcParser(ifc_export_settings)
         ifc_schema = export_ifc.IfcSchema(ifc_export_settings)
         qto_calculator = export_ifc.QtoCalculator()

src/ifcblenderexport/io_export_ifc/ui.py

@@ -61,6 +61,8 @@ class BIMProperties(bpy.types.PropertyGroup):
         name="Predefined Type", default=None)
     ifc_userdefined_type: bpy.props.StringProperty(name="Userdefined Type")
     export_has_representations: bpy.props.BoolProperty(name="Export Representations", default=True)
+    export_should_export_all_materials_as_styled_items: bpy.props.BoolProperty(name="Export All Materials as Styled Items", default=False)
+    export_should_use_presentation_style_assignment: bpy.props.BoolProperty(name="Export with Presentation Style Assignment", default=False)
     qa_reject_element_reason: bpy.props.StringProperty(name="Element Rejection Reason")
     pset_name: bpy.props.EnumProperty(items=getPsetNames, name="Pset Name")
     pset_file: bpy.props.EnumProperty(items=getPsetFiles, name="Pset File")
@@ -440,3 +442,7 @@ class MVDPanel(bpy.types.Panel):
 
         row = layout.row()
         row.prop(bim_properties, "export_has_representations")
+        row = layout.row()
+        row.prop(bim_properties, "export_should_export_all_materials_as_styled_items")
+        row = layout.row()
+        row.prop(bim_properties, "export_should_use_presentation_style_assignment")