March 2013
Intermediate to advanced
984 pages
26h 18m
English
book
OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition
by Dave Shreiner, Graham Sellers, John M. Kessenich, Bill M. Licea-Kane
Content preview from OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition
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Classic Lighting Model
The classic lighting model adds up a set of independently computed lighting components to get a total lighting effect for a particular spot on a material surface. These components are ambient, diffuse, and specular. Each is described below, and Figure 7.1 shows them visually.
Figure 7.1. Elements of the classic lighting model (Ambient (top left) plus diffuse (top right) plus specular (bottom) light adding to an overall realistic effect.)
Ambient light is light not coming from any specific direction. The classic lighting model considers it a constant throughout the scene, forming a decent first approximation to the scattered ...