Similar to --site-local-placement. Motivated by dealing with at least
two examples where IFC files for the same construction site have
inconsistent ObjectPlacement hierarchy:
- MEP models exported from MagiCAD for Revit:
ObjectPlacement.PlacementRelTo of IfcBuilding is empty
- Regular construction models exported from Revit:
ObjectPlacement.PlacementRelTo of IfcBuilding is pointing to
IfcSite's placement
* ifcgeom: Add placement_rel_to for convert()
Change geometry conversion in `convert()` for `ObjectPlacement` such
that we can stop the `PlacementRelTo()` recursion when we hit an
`ObjectPlacement` that places a certain type, e.g. a `IfcSite'.
Introduce a new IteratorSetting `SITE_LOCAL_PLACEMENT` which will be
exposed in `IfcConvert`.
* IfcConvert: Add --site-local-placement
Some IFC authoring tools may put the global origo at a large distance
away from the actual building geometry. Also, the global X- and Y-axes
may be at arbitrary angles with natural building axes. Using
--center-model or --model-offset may place the converted geometry closer
to origo, but will still use the global IFC definition of axis
directions. Also, in a scenario with multiple IFC files for one
construction site, using --center-model on each of them would not
generate consistent geometry across OBJ or DAE files.
Solve this by introducing --site-local-placement which will disregard
the ObjectPlacement at the IfcSite level.
blocovin