Added 3D Noise and Blend Modes to my GLSL Noise library (gl-Noise)! Used it to make a Planet Generator. Demo and GitHub in comments!

• OpenSimplex2

  24 529 4.6 Java

  Successors to OpenSimplex Noise, plus updated OpenSimplex.

/u/ppictures Perhaps the right solution is to use the 2D impl from that repo (there's no evidence my non-lawyer brain can find that 2D simplex has any patent issues), but 3D from here: https://github.com/KdotJPG/OpenSimplex2/tree/master/glsl (two of the actual OpenSimplex algos)

• glNoise

  1 222 2.9 GLSL

  A collection of GLSL noise functions for use with WebGL with an easy to use API.

Here is the GitHub

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• Noise-Extras

  22 23 4.4 Java

  Noise & procedural generation code pieces that I didn't feel needed whole repos all to themselves.

Code for the domain rotation in Java is here. There are various wrappers. You would want one of the methods noise4_ImproveXYZ_ImproveXY, noise4_ImproveXYZ_ImproveXZ, or noise4_ImproveXYZ. You could copy the code from these wrappers directly, or convert it to matrix form to write it compactly in GLSL. For example, noise4_ImproveXYZ_ImproveXZ would be this. Note that I'm using left multiplication so the column-major constructor format can be rearranged to show up the way you would typically write the matrix when doing linear algebra if doing right multiplication.

• webgl-noise

  5 2,691 0.0 C

  Procedural Noise Shader Routines compatible with WebGL

  

Oh I see what you mean now. Not saying https://github.com/KdotJPG/OpenSimplex2 isn't safe, just that https://github.com/ashima/webgl-noise/blob/master/src/noise3D.glsl isn't. Ty for clarifying, makes perfect sense now!

• FastNoise

  57 2,561 7.7 Rust

  Fast Portable Noise Library - C# C++ C Java HLSL GLSL JavaScript Rust Go

There's an HLSL version in here https://github.com/Auburn/FastNoiseLite/blob/master/HLSL/FastNoiseLite.hlsl though it's based on code originally written for the CPU rather than the GPU. It could be worth figuring out which performs better.

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