Colour in different IFC viewers?

smr02smr02
in General

I've opened the same IFC in:

  • Solibri
  • OpenIfcViewer
  • BlenderBIM

The colour of the beam is different in each. Is there some way i can fix this?
Attached my IFC file

Comments

  • MoultMoult

    Are you sure that's the same file? It looks grey to me.

  • smr02smr02

    @Moult you are correct. I've tried to replicate my problem in a simple way. Let me try again:

    I'm creating a IfcBeamType with the following code:

    When I'm opening it with BlenderBIM 0.0.240602 the colour is correct.
    When I'm opening it with Bonsai 0.0.240815 the colour is grey.

    With other Viewers it's as above.
    What am I doing wrong?



    import os
import ifcopenshell
import ifcopenshell.api

def main(model):

    material =  model.by_type('IfcMaterial')[0]
    profile = model.create_entity(
        "IfcIShapeProfileDef", ProfileName="I-EXAMPLE", ProfileType="AREA",
        OverallWidth=0.100, OverallDepth=0.200, WebThickness=0.010, FlangeThickness=0.015, FilletRadius=0.010
    )


    profile_set = ifcopenshell.api.run(
        "material.add_material_set", 
        model,
        name="profile_name", 
        set_type="IfcMaterialProfileSet"
    )


    ifcopenshell.api.run(
        "material.add_profile", 
        model, 
        profile_set=profile_set,
        material=material, 
        profile=profile
    )

    beam_type = ifcopenshell.api.run(
        "root.create_entity", 
        model, 
        ifc_class="IfcBeamType", 
        name="beam_type_name"
    )

    ifcopenshell.api.run(
        "material.assign_material", 
        model, 
        products=[beam_type], 
        material=profile_set
    )

    return model



if __name__ == '__main__':

    ifc_name = 'test2.ifc'
    ifc_file_path = os.path.expanduser(f'~/Desktop/{ifc_name}')
    model = ifcopenshell.open(ifc_file_path)

    model = main(model)

    ifc_name = 'test3.ifc'
    ifc_file_path = os.path.expanduser(f'~/Desktop/{ifc_name}')
    model.write(ifc_file_path)
  • MoultMoult

    Your code doesn't do anything related to colours, so not sure what to say about your code.

    However test3.ifc correctly has a blue colour. In the version released on the Blender extensions store, it may show up as grey, and that's just a temporary regression while we switch to v0.8. It's already been fixed but we haven't yet released a version with the fix I think. Blue is the correct colour, the other two IFC viewers have a bug.

  • smr02smr02

    Ok, thank you, @Moult
    So that bug in the other software seems to only exist for Beams/Columns (Extrusions?)
    So if I Tessellated the Beam, it should show correctly? Unfortunately I don't manage to

    import ifcpatch, ifcopenshell
import os

ifc_name_in = 'test3.ifc'
ifc_file_path_in = os.path.expanduser(f'~/Desktop/{ifc_name_in}')

ifc_name_out = 'Tessellated.ifc'
ifc_file_path_out = os.path.expanduser(f'~/Desktop/{ifc_name_out}')

output = ifcpatch.execute({
    "input": ifc_file_path_in,
    "file": ifcopenshell.open(ifc_file_path_in),
    # "recipe": "Optimise",
    "recipe": "TessellateElements",
    "arguments": ['IfcBeam'],
})

ifcpatch.write(output, ifc_file_path_out)

    gives the following error:

    Note: API not available due to missing dependencies: geometry.add_representation - No module named 'bpy'
Note: API not available due to missing dependencies: grid.create_axis_curve - No module named 'bpy'
Traceback (most recent call last):
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/entity_instance.py", line 352, in __setitem__
    self.method_list[idx](self.wrapped_data, idx, entity_instance.unwrap_value(value))
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/ifcopenshell_wrapper.py", line 6570, in setArgumentAsAggregateOfInt
    return _ifcopenshell_wrapper.entity_instance_setArgumentAsAggregateOfInt(self, i, v)
TypeError: Attribute of type AGGREGATE OF INTEGER needs a python sequence of ints

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/smr/Desktop/test2.py", line 15, in <module>
    output = ifcpatch.execute({
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcpatch/__init__.py", line 84, in execute
    patcher.patch()
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcpatch/recipes/TessellateElements.py", line 115, in patch
    mesh = ifcopenshell.api.run(
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/__init__.py", line 92, in run
    return usecase_function(ifc_file, should_run_listeners=should_run_listeners, **settings)
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/__init__.py", line 258, in wrapper
    raise e
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/__init__.py", line 252, in wrapper
    result = usecase(*args, **settings)
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/geometry/add_mesh_representation.py", line 59, in add_mesh_representation
    return usecase.execute()
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/geometry/add_mesh_representation.py", line 66, in execute
    return self.create_mesh_representation()
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/geometry/add_mesh_representation.py", line 71, in create_mesh_representation
    return self.create_polygonal_face_set()
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/geometry/add_mesh_representation.py", line 96, in create_polygonal_face_set
    faces = [self.file.createIfcIndexedPolygonalFace([v + 1 for v in f]) for f in self.settings["faces"][i]]
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/api/geometry/add_mesh_representation.py", line 96, in <listcomp>
    faces = [self.file.createIfcIndexedPolygonalFace([v + 1 for v in f]) for f in self.settings["faces"][i]]
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/file.py", line 379, in create_entity
    e[idx] = arg
  File "/Users/smr/opt/anaconda3/envs/structural/lib/python3.10/site-packages/ifcopenshell/entity_instance.py", line 354, in __setitem__
    raise TypeError(
TypeError: attribute 'CoordIndex' for entity 'IFC4.IfcIndexedPolygonalFace' is expecting value of type 'AGGREGATE OF INT', got 'list'.
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