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Actually, since splines are nice and smooth (after all, that's what
they're there for!), if you make sure vlength(T) is very small (say
1e-10 for example), then this method should give you a very good
approximation to the tangent; easily good enough for any purpose I can
think of anyway.
Disnel wrote:
> Thanks, but this is not exact way. My ask was, if there is any hidden
> way how to get thi vector from POV ;-). But is must be sufficient..
> Regards
> Disnel
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