WebGL - Drawing a circle in 2d

In this episode, I discuss how to a draw a circle in 2d with WebGL.

Concepts:
* Drawing a circle
* Parametric equation for a circle

Resources:
* https://github.com/davidwparker/programmingtil-webgl/tree/master/0027-drawing-a-circle
* http://www.mathopenref.com/coordparamcircle.html

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