Ah thanks Mh, Sadly i cant read the comments. >.\<
If i remember correctly, on #50 he notes and example on how to interpolate on a triangle using the normal vector. HAvent found a similar example, yet.
Some month ago, i did my first try on rasterization on another computer. Currently reqriting, bust most of the source is lost, and i cant remember how the calculation worked correctly >.\<
Created new Thread for the question on how to interpolate on the triangle in the proper category:
This topic is solved