I think it would be interesting to bundle this as a lesson for high school students. Not necessarily because of the trigonometry, but because it seems very engaging.

It could be a good lead-in to a lesson on straight-edge & compass constructions, which is pretty fun.

This is such a wonderful article, I wish there were more like this out. Thank you for a delightful contribution to educational resources.

thanks, I'm glad to hear that

It's very interesting to see a post on drawing from a programmer perspective.

I've just learned about transformation matrix and I'm not sure but I guess so. I would say its essentially about how a human can draw spheres on a paper.