CUTPOLY command is the only tool in GDL to make structural objects with variable profile in 2 dimension. In all the version of AC GDL, CUTPOLY cannot cut any shape with an internal angle bigger than 180 degree (concave). This is a big problem in many projects I worked on. I have to create my CUTANYPOLY macro which basically triangulates any concave shape to triangle and then issues the CUTPOLY command on each triangle. This is a really slow process but it works.  I believe that somebody in Graphisoft must be able to fix that CUTPOLY command directly so that it would be much more efficient than my CUTANYPOLY macro.

Webscape Team
Alfred Man

webscape.com