Hidden surface removal algorithms and Phong shading

Question

Briefly discuss the concept of Hidden surface removal algorithms and Phong shading?

Answer 1

i) Hidden surface removal algorithm:

Is the most complete and most versatile technique for display of objects in a realistic fashion. The concept is basically to get one ray at a tune, emanatmg form the viewer’s eye (or in perspective projection) and reaching out to each pixel in the view port, employing the laws of optics.

ii) Phong shading:

Is normal vectors are interpolated and then illumination model is applied to each and surface, for rendering a polygon surface.