curves and associated curves. interactive. in javascript.
cartesian polar
Formulas: t is the generic parameter, ranging from t min to t max, specified below.
S (capital) is the current seconds. To use this, you probably also want a positive vlue in FPS.
pi and e are available, as well as the usual javascript math functions, but no need to prepend "Math.".
x: theta:
y: r:
t min: t max: S:
num pts: max FPS:
normal len: tangent len:  
reflection len:  
curve parallels normals tangents pedal scaled parallels reflection