hey ppl plz help in interpolating normals all over each and every triangle of the mesh of the surface …so that I can write a function to implement phongs shading model.
Hiya.
Maybe this article helps (GLSL):
http://www.lighthouse3d.com/opengl/glsl/index.php?dirlightpix
Otherwise look at (CG):
http://http.developer.nvidia.com/CgTutorial/cg_tutorial_chapter05.html