I have a doubt related to the Coordinate System. Looking at the examples files, for instance, the Exercice2C - Solution, used RELATIVE, and the origin of all zones is x = 0, y = 0 and z = 0. I don't understand why, agree with me, in that way the Zone Origin coordinates are not specified relative to the Building Origin.
Using any of them (RELATIVE or WORLD), the vertex of the surfaces continues the same?