Graphics, Figures & Tables ⇒ Coloring regions with Pstricks

[eakyar]

Hi all,

I would like to colored the regions formed by many circles in the plane such a way that any two regions that share a common boundary arc will be colored differently.

It is very difficult task via \pscustom command. Because, first I have to calculate the each intersection point and angles.

Are there another easy way?

Best wishes,
Emrah Akyar

[localghost]

A complete but minimal example would be the first step to get closer to a solution.


Best regards and welcome to the board
Thorsten

[eakyar]

Dear Thorsten,

I have prepared an example with just 3 circles. It was really difficult. I have calculated each intersection point and angle.

I wonder that is it possible to get same output easily?

Emrah

Code: Select all

\listfiles
\documentclass{article}
\usepackage{pstricks}

\begin{document}
  \begin{pspicture}(0,0)(6,5)
    \psset{fillstyle=solid,linewidth=0pt}
    \psframe[fillcolor=blue](0,0)(6,5)
    \pscircle[fillcolor=red](2,2){1.5}
    \pscircle[fillcolor=red](4,2){1.5}
    \pscircle[fillcolor=red](3,3){1.5}

    \pscustom[fillcolor=blue]{
      \psarc[linewidth=3pt](4,2){1.5}{197}{229}
      \psarc[linewidth=3pt](2,2){1.5}{312}{343}
      \psarcn[linewidth=3pt](3,3){1.5}{287}{253}
    }
    
    \pscustom[fillcolor=blue]{
      \psarc(3,3){1.5}{-73}{17}
      \psarc(4,2){1.5}{73}{131}
      \psarcn(2,2){1.5}{48}{-17}
    }

    \pscustom[fillcolor=blue]{    
      \psarcn(4,2){1.5}{-163}{131}
      \psarc(2,2){1.5}{48}{106}
      \psarc(3,3){1.5}{163}{-107}
    }
  \end{pspicture}
\end{document}