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Second derivative of a curve

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  1. baseski

    2008-05-21 09:01:22 UTC
    Once I use the function

    deriveAt(T u, int d, Vector< Point_nD<T,N> >& ders)

    in nurbs.cpp for evaluating derivatives, I get something strange. I fit a curve to sample points of y=x^2 where everyone would expect a constant second derivative of 2. The first derivative looks OK but the second derivative makes no sense at all. Am I doing something wrong or is there a bug?

    Thanks a lot
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