Here's some interesting info on the spiral: http://www.math.hmc.edu/~gu/math142/mellon/curves_and_surfaces/curves/archspiral.html Or, another explanation: spiral of Archimedes n (Mathematics) Maths a spiral having the equation r = aθ, where a is a constant. It is the locus of a point moving to or from the origin at a constant speed along a line rotating around that origin at a constant speed If the above explanation is correct, the easiest way to make one is to not use a curve by cartesian equation as suggested above, but by a cylindrical equation as in: r = t * 1 theta = t * 1 * 360 z = 0 where the "1" in "r = t * 1" means the distance from the Z axis of a coord sys goes evenly from a value of 0 to 1 (or any number you choose), and "theta = t * 1 * 360" means there is a single counterclockwise turn of 360degrees starting at the X axis where you can easily vary the number of turns by substituting any real number (i.e. 1.5 or 3 etc.) for the number of turns. If you wish to enter the degrees of the rotation directly instead of basing it on complete turns as I've shown above, you can simply enter it as: theta = t * 360 for one full turn, 720 for 2 turns etc. Have fun!
