Are there noise functions in GLSL OpenGL ES 2.0 (iOS)?
fragment-shader, glsl, noise, opengl-es, random
Solution
GLSL ES doesn't come with noise functions, and the desktop GLSL noise functions are almost never implemented.
However, there are some freeware noise functions available. They're supposed to be pretty decent and fast. I've never used them myself, but they should work. It's MIT-licensed code, if you're worried about that.
Problem
Or any counterpart? How can I generate a cheap random number?