Epicycles calculator

A chain of epicycles, each rotating at constant angular speed, can draw very complex shapes. Ptolemy (90 – 168 A.D.) used this idea to represent planet orbits. Try to draw something yourself!

Click & draw with the mouse in the square area below and draw a closed curve.

Speed:   Zoom:   Min radius: 0  

Source code here. This work is licensed under a MIT Licence.