Hello all,

A little while ago, Richard Bartels posted an algorithm that calculated

the deBoor-Cox recurrance relation, and gave a method for calculating b-spline

curves based on the algorithm. I have had some problems generalizing the

use of the evaluation algorithm to include NURBS patches. If someone out there

can flip my light switch (so to speak), I would be most appreciative. As of

today's date, I am calculating b-splines the old fashioned way. I call

deBoor-Cox recursively and compute a summation. This is tediously slow. I am

just starting with curves and surfaces, and also would like to know if people

have a preference as to the "best" book for curve and surface basics. I

have Farin, and Bartels, and can't decide which one to start to churn through.

-Jeff Nimeroff

.nosig