funkin.graphics.shaders

A shader that aims to *mostly recreate how Adobe Animate/Flash handles drop shadows, but its main use here is for rim lighting.

Note... not actually gaussian!

Create a little dotting effect.

To use: 1. Create an instance of the class, specifying speed, frequency, and amplitude. 2. Call sprite.shader = wiggleEffect on the target sprite. 3. Call the update() method on the instance every frame.