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This may be a duplicate of Control points of offset bezier curve but I am not quite able to say so. Also, the answers linked there are just one level more abstract than is helpful to my limited understanding.

I have a bezier curve. I want to give an offset distance. I would then like to know, given the vertices and control points in the given curve, at what positions should the vertices and control points be in the second, offset curve?

I think that my curve is relatively simple, at its most complex it would approximate an inchworm: start out flat, curve up then back down, and then flat again (left to right).

I am using Processing (vertex() and bezierVertex()) in case that's helpful.

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Michael
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  • My answer there still applies: http://math.stackexchange.com/a/465789/589. – lhf Nov 19 '13 at 23:01
  • So does mine. The Tiller-Hanson algorithm should be easy enough to understand -- all you have to do is offset the control polygon. – bubba Nov 20 '13 at 06:01

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