Geometry Transform

[c.poupin]

Hi in addition to @francois.picard 's anwser you can check this post

Get bottom 4 corners' coordinate of a family

Hi, Here is an alternative with an aligned BoundingBox. [image] cs = bb.ContextCoordinateSystem; pt1_before_cs = bb.MinPoint.Transform(cs.Inverse()); pt3_before_cs = bb.MaxPoint.Transform(cs.Inverse()); pt2_before_cs = Point.ByCoordinates(pt1_before_cs.X, pt3_before_cs.Y, pt1_before_cs.Z); pt4_before_cs = Point.ByCoordinates(pt3_before_cs.X, pt1_before_cs.Y, pt1_before_cs.Z); // transformed points pt1 = bb.MinPoint; pt2 = pt2_before_cs.Transform(cs); pt3 = Point.ByCoordinates(bb.MaxPoint.X, …