CAP 4710 Study Guide - Quiz Guide: Ray Casting, Specular Reflection, 3D Computer Graphics
Document Summary
Problem 1: ray tracing: 1) give the main idea; and 2) describe the difference from ray casting. (10 pt) Answer 1 : ray tracing is a method by which one will be able to generate realistic images in which the path of light is followed from the viewer to the origin. The light interacts in a way that it is very close to the way light interacts in real life. Unlike ray tracing, which is a realistic rendering technique that supports reflections and shadows in true 3d scenes, ray casting is otherwise a semi-3d technique that is able to work in realtime. Problem 2: phong shading model: 1) give the formula and the illustration figure; 2) Explain the meaning of each term. (10 pt) Answer 2 : formula, hi ns, li + s k (n n. I = a a + i=1 k l. H- the halfway vector between l and v. V- the viewer vector represented by an eye.
