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I'm attempting to find the length of a NURBS curve, but I'm not having any luck (I'm also not entirely sure if NURBS are more of a programming thing, I initially asked this question over on Stack Overflow then realised it was probably more appropriate here, I hope it's okay to post it again on another stack exchange?).

I have a NURBS line which is always composed of 3 points, 3 weights, the knot vector, and is of degree 2.

It doesn't have to be 100% accurate, converting into a polyline and working out the combined length of the segments would be fine too.

Does anyone have any suggestions for how to approach this?

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Incredidave
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  • Related to http://math.stackexchange.com/questions/330232/approximate-arc-length-of-cubic-bezier-curve and http://math.stackexchange.com/questions/12186/arc-length-of-bézier-curves. – lhf Aug 11 '14 at 15:54
  • huh, seems like searching for NURBS instead of Bezier Curve was my problem. Those links look promising, thanks! – Incredidave Aug 11 '14 at 15:57
  • Hmm, I'm still not quite sure how to approach this. The solutions I've found don't seem to take into account weighted control points. – Incredidave Aug 12 '14 at 08:33

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