Chapter 10. Stored Texture Shaders
Texture mapping is a powerful mechanism built into OpenGL. At the time OpenGL was initially defined (1992), texture-mapping hardware was just starting to be available on commercial products. Nowadays, texture mapping is available on graphics hardware at all price points, even entry-level consumer graphics boards.
When OpenGL 1.0 was defined, texture mapping had a fairly narrow definition. It was simply a way to apply an image to the surface of an object. Since then, hardware has become capable of doing much more in this area, and researchers have come up with a lot of interesting things to do with textures other than just plastering images on surfaces. The scope of texture mapping has also been extended in OpenGL. ...
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