Ray casting - polygon rendering and ray tracing methods, Computer Graphics

Ray Casting -polygon rendering and ray tracing methods

It is a method wherein the surfaces of objects visible to the camera are determined by throwing or say casting rays of light from the viewer in the scene. The concept behind this casting is to shoot rays from the eye, one per pixel and get the closest object blocking the path of such ray - think of an image as a screen-door, along with each square in the screen being a pixel.

275_Ray Casting - Polygon Rendering and Ray Tracing Methods.png

It is then the object the eye usually sees by that pixel. By using the material properties and the consequence of the lights in the view, this algorithm can find out the shading of this object. The simple assumption is made when a surface faces a light, then the light will reach such surface and not be blocked or in shadow. The shading of the surface is calculated by using traditional 3-D computer graphics shading models. This type of casting is not a synonym for ray tracing, although can be thought of as an abridged, and considerably faster, version of the ray tracing algorithm. Both images are order algorithms utilized in computer graphics to render 3-dimensional scenes to two dimensional screens by subsequent rays of light from the eye of the observer to a light source. Though ray tracing is as same to ray casting, this may be better consideration of as an extension of ray casting we will discuss such in the next topic in this section.

Posted Date: 4/5/2013 4:09:38 AM | Location : United States







Related Discussions:- Ray casting - polygon rendering and ray tracing methods, Assignment Help, Ask Question on Ray casting - polygon rendering and ray tracing methods, Get Answer, Expert's Help, Ray casting - polygon rendering and ray tracing methods Discussions

Write discussion on Ray casting - polygon rendering and ray tracing methods
Your posts are moderated
Related Questions
1. For the polygon shown in Figure on the next page, how many times will the vertex V 1 appear in the set of intersection points for the scan line passing through that point?  How

Sub Classes of Orthographic Projection There are three ordinary sub-classes of Orthographic (axonometric) projections as: 1) Isometric: The direction of projection makes

determine the tranformation matrix for reflection,computer graphics

pagemaker is a image editor

Line Drawing - Points and lines Line drawing is accomplished through computing the intermediate point coordinates along the line path between two given end points. Since, scre

how can I draw a flower.

what type of animation is produced by the line y=mx+c?

Discuss in detail about rendering Computer animation uses a technique termed as avars (animation variable) where starting point is generally a series of stick figures; for exam

Can you list at least three important applications of computer graphics? There are lots of interesting applications of computer graphics. Three common applications are compute

1. Modify the DDA algorithm for negative sloped lines; discuss both the cases i.e., slope > 1 and 0   Ans. For the generation of lines along with negative slopes as: