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ifcpatch ExtractElements recipe for extracting elements with a specific IFCMaterial query

1. S by Saulius on 20 Oct 2022, edited 21 Oct 2022 #

   Anyone had any luck extracting IfcMaterial with IFC Patch in Blender (with the latest BlenderBIM release)?

   The queries that I've tried did not yield any results:

   .IfcMaterial[material.Name="value"]

   .IfcMaterial[Name="value"]

2. T by theoryshaw on 20 Oct 2022 # +2 votes

   It's...

   .IfcElement[material.Name="value"] if you want all the objects that have the material value assigned to them.

   or

   .IfcWall[material.Name="value"] if you want all the ifcwall objects that have the material value assigned to them.

   etc., etc...

3. M by mdjska on 12 Mar 2023 #

   @theoryshaw I tried using that query in a test file that with four walls with different material assignments (single, layered, constituent and profile), that each include the same material, but eg. selector.parse(file, '.IfcWall[material.Name="Material1"]') only returns the wall with single material. If I understand https://github.com/IfcOpenShell/IfcOpenShell/pull/2503 correctly, it should return all four walls, right?

   I'm using ifcopenshell included in blenderbim, noticed there are some minor differences between that util/selector.py and the 'regular' one, but doesn't seem like that would make a difference?

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