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*On 06/02/2003 at 16:04, xxxxxxxx wrote:*

I need to know how the Cubic interpolation on splines is calculated. I need it for an external application I'm doing that needs to calculate any point along a spline with Cubic interpolation.

What I need, is a routine where I can input a set of points (their x,y,z coordinates) and a value between 0 and 1. A value of 0 will return me the coordinate of the first point and a value of 1 will return me the coordinate of the last point. Any value between 0 and 1 would return me the coordinates of the point of the spline at that percentage point.

Also, a way to define if the intermediate points have a distribution of Natural, Uniform or Adaptive, would be nice... but I could live with only one of those... whatever it is.

Any help? Please!!

Thank you in advance.

Rui Batista