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Duct fittings in BlenderBIM (MEP)

1. C by ccrabbit on 3 Jul 2024, edited 4 Jul 2024 # +6 votes

   Dear all,

   I would like to create Fabrication-grade duct fittings in BlenderBIM. It is easy to draw in Blender with meshes, but how can I create parametric models? There is an example done in SketchUp:

   https://github.com/TaviTav/DuctWork?tab=readme-ov-file

   For those who know Revit, I would like to know how to create Revit Family-like models in BlenderBIM.

   I know Python and C# (though C# is not used in BlenderBIM, as far as I see).

   Thanks.

2. G by Gorgious on 3 Jul 2024 # +1 votes

   AFAIK the BlenderBIM addon doesn't support that high level of parametric modelling natively. There are some builtin profile which you can tweak the parameters but you can't define arbitrary profile parameters. I may be wrong so anyone feel free to correct me if so.

   There are other Blender-based possibilities, like Geometry Nodes (node-based, so it's not really as user-friendly as other tools), Sverchok (node-based too, and has a bridge to ifc with Sverchok-ifc) and CAD-Sketcher (which has a parametric workflow similar to other CAD softwares https://www.cadsketcher.com/)

3. C by carlopav on 3 Jul 2024, edited 3 Jul 2024 # +2 votes

   @ccrabbit do you think it is possible to bound a shape generator to specific standard IFC pset? As BB does with doors for example

4. T by theoryshaw on 3 Jul 2024 # +1 votes

   not an expert but i think the current work around intelligent ducts and fittings can be found...

   • https://github.com/IfcOpenShell/IfcOpenShell/blob/4211e7a936c5571af5602f9fff94282990ff8e94/src/blenderbim/blenderbim/bim/module/model/mep.py#L1225

   • https://github.com/IfcOpenShell/IfcOpenShell/tree/4211e7a936c5571af5602f9fff94282990ff8e94/src/ifcopenshell-python/ifcopenshell/api/system

5. T by theoryshaw on 3 Jul 2024 #

   ping @Andrej730

   :)

6. K by KoAra on 3 Jul 2024 # +1 votes

   I understand that BlenderBIM has devised a way to make geometry to conform to IFC, but it would be a good modeling progress if the tools you are creating for Blender graphics could be converted :)

   https://x.com/noveldrum/status/1751546362666324201

   https://noveldrum.com/blender%E7%94%A8%E3%82%B7%E3%82%A7%E3%83%BC%E3%83%80%E3%83%BC%E3%80%81%E3%83%8E%E3%83%BC%E3%83%89%E3%82%B0%E3%83%AB%E3%83%BC%E3%83%97%E9%85%8D%E5%B8%83/

   

7. G by Gorgious on 4 Jul 2024 # +1 votes

   They can be converted. However you will lose the procedural aspect of it.

8. O by Opus on 4 Jul 2024 # +2 votes

   Not BlenderBIM, but FreeCAD :

   https://wiki.freecad.org/OSE_Piping_Workbench

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