The plan triangles of the IfcSpace meshes whose height range overlaps the render-Y band [lo, hi]. toPlan maps a render-frame vertex to the plan frame the rooms are in; live drops meshes of deleted spaces.
[lo, hi]
toPlan
live
The plan triangles of the IfcSpace meshes whose height range overlaps the render-Y band
[lo, hi].toPlanmaps a render-frame vertex to the plan frame the rooms are in;livedrops meshes of deleted spaces.