Archive: Sensation and Perception Assignment Assignment

This is a copy of the original demonstration.

The below are a copy of the original description and demo:

Best Illusion of The Year 2019 - First Place Winner

This spinning shape appears to defy logic by rotating around both the horizontal and vertical axis at the same time! To make things even more confusing, the direction of rotation is also ambiguous. This code provides an interactive interface for playing with this illusion.