Parametric Spirals

The MakerBot can be sent GCodes which weren't created in skeinforge. The GCodes used to create these spirals were generated on-the-fly at print time; each layer has the formula:

 

X = A * i * sin( i * B)

Y = A * i * cos(i * B)

 

Elliptical spirals can be made by using a different value of A for X and Y. Lisajous figures would result from differing values of B, but I wasn't sure what'd happen to crossovers so I left that experiment for later.

Done