OpenGL® SuperBible, Third Edition

Chapter 6. More on Colors and Materials

by Richard S. Wright, Jr.

WHAT YOU'LL LEARN IN THIS CHAPTER:

How To	Functions You'll Use
Blend colors and objects together	glBlendFunc, glBlendFuncSeparate, glBlendEquation, glBlendColor
Use alpha testing to eliminate fragments	glAlphaFunc
Add depth cues with fog	glFog
Render motion-blurred animation	glAccum

In the preceding chapter, you learned that there is more to making a ball appear red than just setting the drawing color to red. Material properties and lighting parameters can go a long way toward adding realism to your graphics, but modeling the real world has a few other challenges that we will address in this chapter. For starters, many effects are accomplished by means of blending colors together. Transparent ...