"Jide" <jid### [at] kotisoonfi> wrote in
news:3d4ef32d$1@news.povray.org 

>> > Patches (IIRC) are converted into triangles during parsing
>> Are they? I doubt it... that wouldn't be consistent with the
>> functionality of a raytracer.
> 6.5.2.1  Bicubic Patch
> A bicubic_patch is a 3D curved surface created from a mesh of
> triangles. 

there must be function (isosurface) for bicubic path, what is the expresion 
for it ?



-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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