title: How can I set the color of a pixel on a canvas using WebGL?
body: <p>I am very new to WebGL, but not Javascript or Canvas.  Essentially, I need a very fast way to be able to change the color of a pixel on a canvas at any coordinate.  I feel like this could be done using WebGL fragment shaders.  Is this possible, and is there a better way?  How would I go about doing this?</p>