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[Octave-bug-tracker] [bug #45295] Division by Zero in 2nd derivative of
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From: |
Sven |
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Subject: |
[Octave-bug-tracker] [bug #45295] Division by Zero in 2nd derivative of NURBS surface |
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Date: |
Mon, 15 Jun 2015 10:34:21 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0 |
Follow-up Comment #3, bug #45295 (project octave):
Hi Carlo,
yes, my surface has only C0 continuity. Therefore the derivatives at the knots
are undefined in general. However, if I am correctly informed, the derivatives
are defined inside the knot spans as the function is a (piecewise) polynomial.
So shouldn't it be possible to compute the derivative values inside the knot
spans or would I have to separate the surface patch first?
Best regards,
Sven
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