The Study Of Ray-Tracing And Its Anti-aliasing

Analogue lamp-house and environment incident light generating specular reflection, refraction and shadow on the surface of object are synthetically taken into account in the technology of ray-tracing. Since it was found, ray-tracing has been one of the major methods of realistic images generating algorithms for the computer. Because principle of this algorithm is simple ,it is convenient to realize and it generate lifelike vision ,therefore can be applied to CAD and graphics fields extensively.Since ray-tracing algorithm need tracing every ray emitted from the viewpoint, it involves a great deal of intersection points calculations between rays and scenery. And owing to ray-tracing algorithm is a typical process of point sampling, serious aliasing problems appear in its rendering pictures.To the computing intersection problems, this paper focus on the discussion of the computing intersection points algorithm between rays and patches, rays and spheres, rays and cuboids. Then it introduces the envelopment-box technology and space subdivision technology of accelerate rays. Furthermore, this paper beginning with forms of sampling, connecting with theory of sampling, illustrates what causes graphic deformation and treats methods of anti-aliasing in the generating of computer graphics . Last it gives the simulation of ray-tracing and anti-aliasing through the 3d software POV-RAY.