Board Thread:Program Announcements/@comment-25017421-20140603081447/@comment-5334617-20141126030013

There's another case of repeated computations. Every time a face is drawn, the coordinates of its vertices are rotated from the original data to the coordinates used for plotting. Better to rotate all the vertices in a batch before beginning drawing. That way, the rotation calculations for a vertex are performed just once, rather than once per face that uses that vertex.