Hi Frank,
You can use the CWPANEL_HORIZONTAL_DIRECTION and the CWPANEL_VERTICAL_DIRECTION global variables for Curtain Wall Panel subelements, listing and labels. For Curtain Wall Frames the the slant angle is not available, the coordinate system of the frame can be in any position in 3D relatively to the plan file’s coordinate system. I suggest using an editable parameter (or more of them) defined by the User, to provide the needed geometric freedom to the special function.
Csilla Mai
Library Developer, Library Team
GRAPHISOFT SE