patch visible (not hided) elements into a new ifc in Bonsai

B by bernd on 9 Jan 2025, edited 21 Jan 2025 #

load a IFC into Bonsai
hide elements either by the use of the tree or by the use of Colour By Property and Select by Property and H-Button or some other workflow
How is it possible to use patch of all visible elements and save a new ifc out of them?
A temporary workaround could be to get all GUID from all visible elements. With a small code snippet this could be transfered to a query to be used in patch. The question here would be how to get all GUID from all visible elements.

cheers bernd

B by bernd on 9 Jan 2025, edited 9 Jan 2025 #

There is a "Load from Memory" checkbox already on Patch GUI in Bonsai, but it uses all elements from the loaded ifc and not the visible ones.

B by bernd on 21 Jan 2025 #

Noone an idea ... How to get all GUID from all visible objects in Bonsai by python?

S by steverugi on 21 Jan 2025, edited 21 Jan 2025 #

not sure this is correct (just trying to guess here)

visible object can be found with


import bpy

import ifcopenshell

from bonsai import tool

model = tool.Ifc.get()

objlst = bpy.data.objects

for obj in objlst:

    if obj.name.startswith("Ifc") and obj.visible_get():

        print(obj.name)

which prints a list of Blender "turned on" objects in the model returning IfcClass/name, you can make a dictionary out of it or a list

from there maybe you could use ifcopenshell.util.selector(model, query) that accepts name and type in it to narrow them down to valid IfcBuildingElement

after that the GUID comes with element.id()

sorry I am not much of an expert in python, just curious to see how this can be achieved

M by mastrolube on 21 Jan 2025, edited 22 Jan 2025 # +2 votes

Python programmer here.

The best way is to create a new recipe with ifcpatch

Have a look here:

https://docs.ifcopenshell.org/ifcpatch.html

and here

https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.8.0/src/ifcpatch/ifcpatch/recipes

This is the location on your system where you save new recipes: %AppData%\Blender Foundation\Blender\4.2\extensions\.local\lib\python3.11\site-packages\ifcpatch\recipes

Restart blender to make them available :)