A godot shader material that draws a voronoi pattern on a surface using a fragment shader.
The code has two parts - voronoi.shader which runs on the GPU and voronoi_driver.gd, which runs on the CPU.
Each frame, voronoi_driver updates the position of 100 points, encodes them in a texture, and passes that texture the voronoi.shader as a uniform.
Voronoi.shader uses the set of points in a fragment shader to decide what color a given pixel should be. If the pixel is on the edge between two points (within a margin of error), it draws the 'edge' color. Otherwise, it draws the color of the nearest point to the pixel.