Relationships in IFC

M by Moult on 23 Sep 2021 #

D'oh! Missed it! :D

F by FerdiV on 10 Mar 2022 #

I am a beginner Python/IFC user. All of this is pretty overwhelming, however I am enjoying at the same time. I have been able to extract some data, but the geometry stuff is still pretty new to me.

I also am trying to find out how to find all windows belonging to a certain space. As I understand, this not easy. I was wondering, is it possible to search for the closest space in direction (and opposite direction) of the face of a window?

I also tried @aothms last reply. I am getting errors at the "setup BVH tree":

'tree' object has no attribute 'add_iterator'

However I found https://wiki.osarch.org/index.php?title=IfcOpenShell_code_examples

I think I should put some time in understanding geom I guess :)

A by aothms on 10 Mar 2022 # +2 votes

'tree' object has no attribute 'add_iterator'

You're likely running an older version. Try https://github.com/IfcOpenBot/IfcOpenShell/commit/883b8a523c63027f2f6c91650385d47edba5521b#comments

search for the closest space in direction (and opposite direction) of the face of a window?

There's quite a few adhoc things in the latest version of the tree. You can try:

tree.ray_intersect() https://github.com/IfcOpenShell/IfcOpenShell/blob/v0.7.0/src/ifcgeom/IfcGeomTree.h#L435

example usage in python

https://github.com/IfcOpenShell/IfcOpenShell/blob/v0.7.0/src/ifcopenshell-python/ifcopenshell/draw.py#L262