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An Interactive Introduction to OpenGL Programming

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<strong>OpenGL</strong> and Color<br />

• The <strong>OpenGL</strong> Color Model<br />

– <strong>OpenGL</strong> uses the RGB(A) color model<br />

• There is also a color-index mode, but we won’t<br />

discuss it <strong>to</strong>day<br />

• Colors are specified as floating-point<br />

numbers in the range [ 0.0, 1.0 ]<br />

– for example, <strong>to</strong> set a window’s background<br />

color, you would call<br />

glClearColor( 1.0, 0.3, 0.6, 1.0 );<br />

R G B A

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