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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED**

*On 05/06/2010 at 17:29, xxxxxxxx wrote:*

User Information:

Cinema 4D Version: 11.5

Platform: Windows ; Mac ; Mac OSX ;

Language(s) : C.O.F.F.E.E ;

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I know how to get the coordinates (global or local) of a point along a spline.

But how can I get the plane that is perpendicular to that point in the spline?

Maybe its easier to understand with a picture:

I have a spline (the blue curve). Now imagine that I have the point located at 0.45 along the spline (using UniformToNatural...). How can I calculate the plane that is perpendicular to that specific point? (the red plane, in the picture, perpendicular to the tangent of the spline in that point).

I ask this because I need to calculate points on the surface of that plane (the green dots). Actually, I need to calculate a vector that is coplanar to that plane and that has its origin in the point of the spline that I'm calculating the perpendicular plane from.

Anyone? Please?

Thank you very much in advance.

Rui Batista