Wave gradient

After yesterday’s faux shader experiment ( ) I thought it might be nice to actually implement infinite cosine wave gradients as a thing which exists. This is an entirely different type of gradient from the ’coloured-grip’ one, in that the number of grips is fixed, the grips are two-dimensional and the gradient is expressible as a single equation instead of a bunch of complicated interpolation algorithms. @Daniel Hambleton, the background here is drawn us