[comp.graphics] Bartel's basis evaluation function

jeffry@bu-pub.bu.edu (Jeffry Nimeroff) (05/09/90)

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