# Is it possible to construct more than one stroke with different colors inside a single \pscustom?

Is it possible to get the following output where the upper graph is red and the lower one is blue

\documentclass[pstricks,border=17pt]{standalone}
\usepackage{pst-plot}
\psset{algebraic,linewidth=1pt}

\begin{document}

\begin{psgraph}{->}(0,0)(5,2.5){6cm}{5cm}
\pscustom[linestyle=none,fillstyle=solid,fillcolor=orange]
{
\psplot{1}{4}{sqrt(x)}
\psplot{4}{1}{sqrt(x/2)}
}
\psplot[linecolor=red]{1}{4}{sqrt(x)}
\psplot[linecolor=blue]{4}{1}{sqrt(x/2)}
\end{psgraph}
\end{document}


only by using a single \pscustom inside \psgraph (no \psplot outside \pscustom for sure!)?

My attempt is as follows but it fails because both graphs are blue.

\documentclass[pstricks,border=17pt]{standalone}
\usepackage{pst-plot}
\psset{algebraic,linewidth=1pt}

\begin{document}

\begin{psgraph}{->}(0,0)(5,2.5){6cm}{5cm}
\pscustom[linestyle=none]
{
\psplot{1}{4}{sqrt(x)}
\stroke[linestyle=solid,linecolor=red]
\gsave
\psplot{4}{1}{sqrt(x/2)}
\fill[fillstyle=solid,fillcolor=orange]
\grestore
\psplot[liftpen=2]{4}{1}{sqrt(x/2)}
\stroke[linestyle=solid,linecolor=blue]
}
\end{psgraph}

\end{document}


Is it possible to construct more than one stroke with different colors inside a single \pscustom?

-

\documentclass[pstricks,border=17pt]{standalone}
\usepackage{pst-plot}
\psset{algebraic,linewidth=1pt}

\begin{document}

\begin{psgraph}{->}(0,0)(5,2.5){6cm}{5cm}
\pscustom[linestyle=none]
{
\psplot{1}{4}{sqrt(x)}
\gsave
\stroke[linestyle=solid,linecolor=red]
\psplot{4}{1}{sqrt(x/2)}
\fill[fillstyle=solid,fillcolor=orange]
\grestore
\newpath
\psplot[liftpen=2]{4}{1}{sqrt(x/2)}
\stroke[linestyle=solid,linecolor=blue]
}
\end{psgraph}

\end{document}

-
Can you give some explanation how the code work? Why do we need to swap the first 3 rows? And why do we need a new path? –  kiss my armpit Apr 24 '13 at 12:39
@Bugbusters I guessed and got lucky:-) I can't really remember any pstricks but in postscript if you want to draw two paths with different stroke settings you need a newpath operator somewhere so I guessed there was a pstricks \newpath command and guessed putting it there might help.... –  David Carlisle Apr 24 '13 at 12:44
that is wrong, because "one path -- one stroke". The read line has only the half width because the filling area is above the other half of the line. –  Herbert Apr 24 '13 at 13:10
@Bugbusters if in doubt do what Herbert says:-) –  David Carlisle Apr 24 '13 at 13:22
@Herbert yes I suppose subconsciously I noticed that and ignored it, I assume the red line could be stroked last to get back on top of the fill? –  David Carlisle Apr 24 '13 at 13:36

Using \pscustom with gsave-grestore seems to be overkill.

\documentclass[pstricks,border=17pt]{standalone}
\usepackage{pst-plot}
\psset{algebraic,linewidth=1pt}

\begin{document}

\begin{psgraph}{->}(0,0)(5,2.5){6cm}{5cm}
\pscustom[linestyle=none]
{
\gsave
\psplot{1}{4}{sqrt(x)}
\psplot{4}{1}{sqrt(x/2)}
\fill[fillstyle=solid,fillcolor=orange]
\grestore
\newpath
\psplot{1}{4}{sqrt(x)}
\stroke[linestyle=solid,linecolor=red]
\newpath
\psplot{4}{1}{sqrt(x/2)}
\stroke[linestyle=solid,linecolor=blue]
}
\end{psgraph}

\end{document}

-