WebGL - Intro to Matrices / 2d translation

In this episode, I discuss Matrices in WebGL and use 2d translation with a Transformation Matrix.

Concepts:
* Matrix multiplication
* Vectors
* APIs
* GLSL `uniform mat4`
* gl.uniformMatrix4fv

Resources:
* https://github.com/davidwparker/programmingtil-webgl/tree/master/0038-intro-matrices

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