Graphics Reference
In-Depth Information
1
The Fixed-Function
Graphics Pipeline
In your first course in computer graphics, you probably used a graphics API
to help you create your projects. Because this topic focuses on graphics using
OpenGL, we assume that your API was OpenGL, and in this chapter we
review the graphics pipeline as it is expressed in OpenGL versions 1.x. If you
used a different API, especially in a first graphics course, your experience was
probably very close to the OpenGL approach. These APIs used a fixed-function
pipeline , or a pipeline with a fixed set of operations on vertices and fragments.
In the rest of this topic, we will look at the shader capabilities of OpenGL ver-
sions 2.x and how you can use them to create effects that are difficult or impos-
sible with the fixed-function pipeline.
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