Add_profile_representation and clippings

[maxfb87]

I think that there is a problem with "add_profile_representation" api and clippings.
In order to recreate the problem, try to create a new project with demo library and add a new column on 0,0,0 with the length 5m
After that, run this script

import blenderbim.tool as tool
import numpy as np
import ifcopenshell

model = tool.Ifc.get()
obj = C.active_object
entity = tool.Ifc.get_entity(obj)
representation = entity.Representation[2][1]
matrix = np.eye(4)
matrix = ifcopenshell.util.placement.rotation(45,"X") @ matrix
matrix[:,3][0:3] = (0, 0, 3)
matrix = matrix.tolist()
ifcopenshell.api.run("geometry.add_boolean", model, representation = representation, type = "IfcHalfSpaceSolid", matrix = matrix)

Basically i want to apply a simple clipping plane on the column.
After that, try to regen the object: i get the same error as reported here

I think that the problem is in the "add_profile_representation" api.
I have created a possible solution and, if you want, i'll do a PR but, before that, i wanted to be sure that this is actually a bug...
Thanks,
Massimo

[Moult]

Yes, it's a bug :) PR very welcome!

[Moult]

I ended up doing this slightly simpler and using the ifcopenshell.util.element.copy which preserves the operation type instead of hardcoding DIFFERENCE and also fixing the same bug in the wall representation function.