AN ALGORITHM FOR IMPROVED SHADING OF COARSELY TESSELLATED POLYGONAL OBJECTS
Chandan Singh, Ekta Walia · Kluwer Academic Publishers eBooks · 2006
Abstract There are many objects whose shape requires them to be tessellated coarsely for example cone, cube, teapot with its body constituted by large triangles. The existing shading algorithms other than Phong Shading, cannot correctly render the specular highlights on such coarsely tessellated objects. It is known universally that Phong shading is still not used commercially due to its requirement of per-pixel normal vector normalization. In this paper, we present an algorithm that uses cubic bezier triangles for interpolation of diffuse and specular component of intensity. In most of such cases, this algorithm produces better visual results as compared to Phong Shading at comparatively lower cost.