Rearranged ToDo
Added new method of affine interpolation. However, doesn't look so much nicer :\
Fixed a HUGE bug in the projection. Only problem: This bug was there for a long time. That means, EVERY sparrow3d project is maybe incompatible right now. I am very sorry about this, but it was necessary. So, what is new? If you use 3d: Check your spSetPerspective call. If you use the same like in the example, change the field of view from 50 to 130. If you don't change it to a sense making value or use spTranslate to get the same look like before. If you use 2d (even text blitting!) WITH z-Test: The direction of z has changed. That means: Every >= 0 will be drawn now.