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Perlin noise is ubiquitous in modern CGI. Used for procedural
texturing, animation, and enhancing realism, Perlin noise has been
called the "salt" of procedural content. Perlin noise is a type of
gradient noise, smoothly interpolating across a pseudo-random matrix
of values.
The noise library includes native-code implementations of Perlin
"improved" noise and Perlin simplex noise. It also includes a fast
implementation of Perlin noise in GLSL, for use in OpenGL shaders.
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