3D graphics on the microcontroller.

I was written a small system of rendering 3D images in real time.
The maximum size of the picture is 256x256 points.
It allows you to draw both the wire graphics and the painted triangles.
There is the possibility of imposing texture, pixel and top shadery,
Z is a buffer, a buffer of trafficate.
Optimized as much as possible. (for #Arduino Mega2560)
2 rotating squares give 25fps, the more geometry the less fps.
Can be improved and used on more powerful controller or to render a quality image not in real time or to create games.