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David Fontaine <dav### [at] faricynet> wrote in message
news:3928ADAE.15F2E71E@faricy.net...
> #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>
> }
>
In function{}'s it is 'ln' instead of 'log'
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