Whoops, forget what I said in the previous message. The set-rshift
feature was for something completely different ... it was a bit of a
hack to allow us to change the radius of curvature as a function of
time in a simulation of a waveguide bend.
What you want to do instead, is to just use the (undocumented)
geometry-center variable:
(set! geometry-center (vector3 R 0 0))
This should make the origin in cylindrical coordinates start at r=R
rather than at r=0.
Steven
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