The green flag and see. You can change the sliders "a" and "n" If n is a positive integer, then the curve is closed, and has n-1 cusps (i.e., sharp corners). n=2— a cardioid 1- sharp corners n=3— a nephroid - 2 sharp corners n=4— a trefoiloid- 3 sharp corners n=5— a quatrefoiloid- 4 sharp corners
Group epicycloid curve parametric equations described: x = r * (n*cos t - cos(n*t)) y = r *(n*sin t - sin(n*t)) + geometric transformations Number n specifies the number of blades hipocycloid when it is integer. n can be given as a decimal, then give beautiful designs and shapes. music: Papa-paparapa-Papa Remix (Solo Players) (Youtube)