Window voids Slabs in a weird way

[bdamay]

As discussed here https://community.osarch.org/discussion/2002/irregular-walls#latest
If we select a window and a slab with angle and type "Apply void" the window rotates perpendicular to the plan of the slab instead of Opening the slab

[bdamay]

I made a patch in model/opening.py (around line 100) that assumes the window should bear the void when affecting new_matrix variable

 if element.is_a("IfcSlab") and filling.is_a("IfcWindow"):
                # in this case i think new_matrix should be the filling obj
                # i also wonder in what case it shouldn't be the filling obj that opens the target
                # (in that last case we could unfilter this section ) 
                new_matrix = filling_obj.matrix_world.copy()

This seems to correct things but one have to position the window correctly before applying the void

shall i send a PR ? (i'm not sure of the way you want things done)