**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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED**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