One of my first uses of _MapTriangle was for drawing solid filled triangles. Once you have that you have any polygon filled and once you have that you can change triangles into rectangles 
see here!
https://qb64phoenix.com/forum/showthread.php?tid=339
Also Rotozooms absolutely need _MapTriangle! as Steve has put together a demo in post above.

see here!
https://qb64phoenix.com/forum/showthread.php?tid=339
Also Rotozooms absolutely need _MapTriangle! as Steve has put together a demo in post above.
724 855 599 923 575 468 400 206 147 564 878 823 652 556 bxor cross forever

