I’m trying to get points from an image, project them onto a sphere, move the points along the sphere, and then convert them back for simulating plate tectonics. The code to get the points from the image works fine, it’s the last four functions, __move_point(), __rotate_point(), __convert_to_spherical(), and __convert_to_equirectangular() that aren’t working. I’m expecting polar distortion, but the shape is just being translated.

I’m trying to move a shape along an equirectangular projection by converting the pixels into spherical coordinates, moving them, and then converting them back. Its been a while since I’ve done any kind of mathematics like this, so I’m sure I’m doing something wrong or using the wrong equations or something, I just don’t know what.