是否可以在单个 \pscustom 中构建多个具有不同颜色的笔触？

Question

是否有可能得到以下输出，其中上图为红色，下图为蓝色

\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}

仅使用一个\pscustom内部\psgraph（肯定不使用\psplot外部！）？\pscustom

我的尝试如下，但由于两个图都是蓝色而失败。

\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}

是否可以在单个笔画内构建多个具有不同颜色的笔画\pscustom？

Answer 1

\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}

Answer 2

使用\pscustomwithgsave-grestore似乎有些过度。

\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}