glsl
"OpenGL Shading Language (GLSL) is a high-level shading language with a syntax based on the C programming language. It was created by the OpenGL ARB (OpenGL Architecture Review Board) to give developers more direct control of the graphics pipeline without having to use ARB assembly language or hardware-specific languages." - https://en.wikipedia.org/wiki/OpenGL_Shading_Language
Links
- https://youtu.be/f4s1h2YETNY: Tutorial
- https://developer.mozilla.org/en-US/docs/Games/Techniques/3D_on_the_web/GLSL_Shaders
- https://www.shadertoy.com
- https://graphtoy.com: Visualize glsl mathematical functions. It's like a glsl oscilloscope.
- https://thebookofshaders.com
- https://iquilezles.org/articles