Classic Spirals

Here are three different mathematically defined spirals.

The same function is used to draw each spiral. It draws a series of curve segments using the curveTo() function, starting in the center, and then working outwards. Each spiral uses a different function which computes the radius (R) , given the current angle around the circle (A).

The value K is a constant that is used to provide the amount of 'tightness' for each spiral.

If you're interested in learning more about the mathematics behind these spirals, two classics to check out are Robert Dixon's Mathographics, and Theodore Cook's The Curves of Live, both published by Dover.