A node assemblage, shamrocknod.nod, was created to test some angle ranges for u.
Note that if the SwRotary node is not in its default (first pole) position when the node program is saved, the SwRotary will not work. (a minor SwRotary node bug).
Theta of PI/3 yields a half curve, from +y to the origin.
Theta of 2*PI/3 yields a full closed curve. It is nicely rounded near the origin. The start point is not quite at the origin, and the midpoint is also slightly away from +Y.
This could be manually corrected...
Higher switch positions have the cusp problem, near the origin.
- Brian
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