IfcPatch, Assume Asset Uniqueness By Name

Comments

• theoryshaw

  April 25

  this help?
  https://github.com/IfcOpenShell/IfcOpenShell/blob/52af302bef0b967fa7605bfbe59b903ee81eb919/src/ifcpatch/ifcpatch/recipes/ExtractElements.py#L43-L50

  
• Gorgious

  May 5 edited May 5

  From my understanding profiles, materials and styles do not support global identifiers (GUID) like rooted elements do. GUID are used to identify elements uniquely throughout the life of a project, or when you merge different projects to avoid conflicts. So one of the ways to avoid duplicating these without a global identifier is to assume that if they share the same name, they are the same asset. But it's not always true, two projects can independently define a glass material with different properties but the same name, so you can choose if you want to keep both or merge them.

  
• bernd

  May 27 edited June 18

  thank you guys for the link to the code and for the great explanation ...
• bernd

  June 18 edited June 18

  from python I use this to run ifcpatch ...

  import ifcopenshell
  import ifcpatch
  in_ifcfile = ifcopenshell.open("C:/Users/BHA/Desktop/ifcpatch_work/22149_ING_N_TRW_20250328y_bimtester.ifc")
  out_ifcfile = ifcpatch.execute({
      "input": in_ifcfile,
      "file": in_ifcfile,
      "recipe": "ExtractElements",
      "arguments": ["IfcSlab"],
  })
  ifcpatch.write(out_ifcfile, "C:/Users/BHA/Desktop/ifcpatch_work/BIMPatch/ZZ_Slabs.ifc")
  

  It seams the assume_asset_uniqueness_by_name is activated with the code above.

  On some models I get corupted geometry if it is activated. If I run ifcpatch from Blender Gui and deactivate the pref I get no corrupted geometry. If I activate it, I get corupted geometry or even a run break.

  I would like to help to debugg the problem ... How can I deactivate the setting in the python code above?

  cheers
• bernd

  June 18 edited June 18

  @theoryshaw said:
  this help?
  https://github.com/IfcOpenShell/IfcOpenShell/blob/52af302bef0b967fa7605bfbe59b903ee81eb919/src/ifcpatch/ifcpatch/recipes/ExtractElements.py#L43-L50

  It helped a lot today ... Add Falseto the arguments and assume_asset_uniqueness_by_name is deactivated :-)

  import ifcopenshell
  import ifcpatch
  in_ifcfile = ifcopenshell.open("C:/Users/BHA/Desktop/ifcpatch_work/22149_ING_N_TRW_20250328y_bimtester.ifc")
  out_ifcfile = ifcpatch.execute({
      "input": in_ifcfile,
      "file": in_ifcfile,
      "recipe": "ExtractElements",
      "arguments": ["IfcSlab", False],
  })
  ifcpatch.write(out_ifcfile, "C:/Users/BHA/Desktop/ifcpatch_work/BIMPatch/ZZ_Slabs.ifc")