[pstricks] Problems with multido package

[Herbert Voss]

Rafael Castro wrote:
> Thanks Herbert, finally I could use this package (I really don't not 
> how). I have been using this weekend Pstricks in order to get some 
> experience and it is really wonderful. I have tried this code from 
> internet, but I have two questions:
> 
> 1. There is some information about how to write matematical formulas 
> with Postscript, becuase for me it is quite difficult.

It just works like the HP-pocket calculators (postfix notation).
Read the documentation of pstricks-add or infixplot for using
the infix notation (algebraic) for plotting functions.

> 2. I have trouble when I run this code to pdf.

see http://PSTricks.tug.org/main.cgi?file=pdf/pdfoutput

the following example uses pst-pdf and the script ps4pdf
http://perce.de/LaTeX/pst-pdf/

Herbert


\documentclass[12pt]{article}
\usepackage{pstricks}
\definecolor{light}{rgb}{0.3,0.4,0.6}
\usepackage{pst-3dplot}
\usepackage{pst-pdf}
\pagestyle{empty}
\def\drawCircles{%
  \parametricplotThreeD[xPlotpoints=100](80,360)(0,360){%
    /k 2 def /k2 4 def
    t cos k mul 3 u sin k mul add mul
    t sin k mul 3 u sin k mul add mul
    u cos k2 mul
  }
  \parametricplotThreeD[yPlotpoints=75](0,360)(80,360){%
    /k 2 def /k2 4 def
    u cos k mul 3 t sin k mul add mul
    u sin k mul 3 t sin k mul add mul
    t cos k2 mul
  }
\parametricplotThreeD[yPlotpoints=1,linecolor=red,linewidth=2pt](0,360)(80,360){%
    /k 2 def /k2 4 def
    u cos k mul 3 t sin k mul add mul
    u sin k mul 3 t sin k mul add mul
    t cos k2 mul
}}

\begin{document}

\psset{unit=0.75}
\begin{pspicture}(-10,-6)(10,6)
    \psset{Beta=20,Alpha=50,linewidth=0.1pt,linecolor=light}
    \drawCircles
\end{pspicture}

\clearpage
\begin{pspicture}(-10,-10)(10,10)
    \psset{Beta=90,Alpha=50,linewidth=0.1pt,linecolor=light}
    \drawCircles
\end{pspicture}

\clearpage
\begin{pspicture}(-10,-6)(10,6)
    \psset{Beta=0,Alpha=50,linewidth=0.1pt,linecolor=light}
    \drawCircles
\end{pspicture}

\end{document}