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#declare KuenSurface = parametric {
function (2*sqrt(1+u^2)*cos(u-atan2(u,1))*sin(v))/(1+u^2*sin(v)^2),
(2*sqrt(1+u^2)*sin(u-atan2(u,1))*sin(v))/(1+u^2*sin(v)^2),
log(tan(.5*v))+(2*cos(v))/(1+u^2+sin(v)^2)
<0,0>,<2*pi,pi>
<-5,-5,-5>,<5,5,5>
}
any help appreciated :-)
--
David Fontaine <dav### [at] faricynet> ICQ 55354965
Please visit my website: http://www.faricy.net/~davidf/
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