Ron Parker <ron### [at] povrayorg> wrote:
: Not really.  Bezier patches/bicubic patches are neither non-uniform nor
: rational.

  I think this means in practice that you can fine-tune the parameters
of a NURBS more extensively than those of a bicubic patch.
  I'm not completely sure about this, but I think that with a NURBS you can
control, among other things, the curvature and tangent of the curve at each
control point individually.

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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