[pstricks] pst-solides3d

[Herbert Voss]

and the image ...

Herbert

Am 17.11.19 um 21:51 schrieb Herbert Voss:
> Just for fun:
>
> \listfiles
> \documentclass[pstricks]{standalone}
> \usepackage{pst-solides3d}
> \begin{document}
>
> \def\A{3.0}
> \def\B{0.5}
> \begin{pspicture}(-3.5,-3.5)(3.2,13)
> \psset[pst-solides3d]{viewpoint=20 -20 30 
> rtp2xyz,Decran=15,lightsrc=viewpoint}
> \defFunction[algebraic]{shell}(u,v)%
>    {\A*cos(u)*sin(v)}%
>    {\A*sin(u)*sin(v)}%
>    {\A*(cos(v)+ln(tan(v/2))) + \B*u}
> \psSolid[object=surfaceparametree,
>   linecolor={[cmyk]{1,0,1,0.5}},
>   base=0 pi 8 mul  0.1 2, fillcolor=yellow!50,
>   incolor=green!50, function=shell, 
> linewidth=0.5\pslinewidth,ngrid=100 50]%
> \end{pspicture}
> \end{document}
>
>
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