I just asked https://stackoverflow.com/questions/10272204/hidden-line-removal-without-access-to-opengl on SO, however I don't know if SO is the best place to ask it. The question is more asking how to do the math behind Hidden Line Removal. Also I have a strong suspicion that most people on SO will not have had experience drawing 3D without using a library like OpenGL or Direct3D.
Should I close my question and move it to the mathematics site,
open another copy there, or just leave it here as it would not be appropriate there either?