I was looking at the ripples pattern some more, scaled to a regular 1 unit
size (also in the y axis). Appears what is happening might be that the phase
suddenly reverses the 0 to 1 bounds into a -1 to 1 zone instead. Why it
would only start to (and end) at a range of phase 0.16 to 0.84 (that's a guess
by the way) and not for all parts of phase 0 to 1 is beyond my understanding.
Perhaps related to sine and/or cosine?
Bob
