Derivative of CCurve

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 21/12/2008 at 15:02, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   11 
Platform:      Mac OSX  ; 
Language(s) :     C++  ;

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I need the derivative of a CCurve at a random point (not necessarily a key point).

CalcHermite() works fine for the original function but not for the derivative.
If I draw a straight line in the timeline the results of the derivative should be constant but they are not.

Is this a bug or am I missing something?

Thanks in advance
Macm

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 06/01/2009 at 09:02, xxxxxxxx wrote:

Make sure to get the tangents of the keys with CCurve::GetTangents(). Also check for the different interpolation types (linear, step). For these you have to calculate the derivative yourself.

cheers,
Matthias