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This is a simple project I wrote to test out an animation idea. It shows a simple, linear animation whose speed does not vary. It moves in a very robotic manner. Contrast that with a ‘smooth’ animation, using the cosine wave to adjust the speed. It starts slow, moves fastest in the middle, and then slows up toward the end. This animation is much more natural.

History:
I had the idea of using a cosine wave several years before ever coding it up. I never had all the math quite figured out. One night I realized I could slap something together in html/javascript fairly quickly, so I stayed up late, figured out the math, and got it working.