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Phong Shading and Gouraud Shading The standard reflection model in computer graphics that compromises between acceptable results and processing cost is the Phong model.
- Essay length: 2557 words
- Submitted: 02/06/2012
The first 200 words of this essay...
Phong Shading and Gouraud Shading
The standard reflection model in computer graphics that compromises between acceptable results and processing cost is the Phong model. The Phong model describes the interaction of light with a surface, in terms of the properties of the surface and the nature of the incident light. The reflection model is the basic factor in the look of a three dimensional shaded object. It enables a two dimensional screen projection of an object to look real. The Phong model reflected light in terms of a diffuse and specular component together with an ambient term. The intensity of a point on a surface is taken to be the linear combination of these three components.
Ambiant - light that comes from all directions equally and is scattered in all directions equally by the polygons in the scene. This isn't quite true of the real world - but it's a good first approximation for light that comes pretty much uniformly from the sky and arrives onto a surface by bouncing off so many other surfaces that it might as well be uniform.
Diffuse - light that comes from a particular point source (like
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