I have a precise bezier curve (from Adobe Illustrator) that I want to turn
into a lathe object for POV-Ray.

I know that a cubic spline takes four points to determine the curve.  A
bezier curve also takes four but it doesn't seem to be implemented in the
same way. The main differences are:

* A bezier curve segment has 2 end points and 2 control points.  The curve
doesn't pass through the control points.
* A cubic spline segment has four points; the curve does pass through all 4.

Is there a simple mathematical way to convert the bezier to the spline?
Maybe there is an unofficial POV version that allows lathe objects to be
described with the coordinates of a bezier curve?


---------------------
Anthony C. D'Agostino
sco### [at] csicom
http://ourworld.compuserve.com/homepages/scorpius
Home of the finest ray-traced puzzles rendered with POV-Ray.

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