This is really neat. I was amused by this, though: >I tried to add a skew there, but it turned out to be unnecessary. and then >It should be noted here, by t

This is really neat. I was amused by this, though: >I tried to add a skew there, but it turned out to be unnecessary. and then >It should be noted here, by the way, that the sprite is highly distorted vertically (the shadow sprite original looks like a circle). That’s why its rotation looks like not just a simple rotation but also like a distortion. …which, if I recall my affine transforms, would also be called a "skew". I think I get the point though. This let them construct the skew in a more intuitive way than trying to make it an explicit parameter.