implementing GetElbowCentre for https://forums.autodesk.com/t5/revit-api-forum/how-to-calculate-the-center-point-of-elbow/m-p/9803893
implementing GetElbowCentre for https://forums.autodesk.com/t5/revit-api-forum/how-to-calculate-the-center-point-of-elbow/m-p/9803893

jeremytammik/the_building_coder_samples