References:
The Shadertoy: https://www.shadertoy.com/view/fst3DH
Previous Episode of Shader Math:    • Shadertoy Math — CircleRect Intersec...  
Dot Product: https://en.wikipedia.org/wiki/Dot_pro...
OpenGL Template: https://github.com/tsoding/opengltem...
AntiAliasing in Rust:    • AntiAliasing in Rust  

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