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tikz 图片：绘制不透明度与填充不透明度？

tag-icon • tag-icon tikz-pgf graphics transparency
tikz 图片：绘制不透明度与填充不透明度？ 
\documentclass{article}
\usepackage{tikz}

\begin{document}
\pagenumbering{gobble}

\hskip-1.25in
\begin{tikzpicture}[thick,fill opacity=.4,draw opacity=1]
%\draw[step=1cm] (-9,-9) grid (9,9);
%\filldraw[fill=black,fill opacity=1] (0,0) circle (.5mm);
\draw[fill=yellow] (-9,-8) rectangle (9,8);
\draw[fill=orange,dashed] (-3,-5) rectangle (9,5);
\draw[fill=green,dotted] (-3,-4) rectangle (5,4);
\draw[fill=red] (-9,-6) rectangle (2,6);
\draw[fill=blue] (-6,-2) rectangle (0,2);
\end{tikzpicture}

\end{document}

使叠加矩形的边框具有不同的厚度/不透明度（如下所示）。

在此处输入图片描述

我如何设置每个矩形的厚度以通过更透明的填充显示出来？我认为这就是 draw opacity=1 可以实现的。

答案1

draw opacity=1确实会绘制不透明线，但如果您在该对象前面（顶部？）放置某些东西，外观将受到影响。因此，您可以更改绘制对象的顺序以强调其外观。

\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}[thick,fill opacity=.4,draw opacity=1]
\draw[fill=yellow] (-9,-8) rectangle (9,8);
\draw[fill=red] (-9,-6) rectangle (2,6);
\draw[fill=orange,dashed] (-3,-5) rectangle (9,5);
\draw[fill=green,dotted] (-3,-4) rectangle (5,4);
\draw[fill=blue] (-6,-2) rectangle (0,2);
\end{tikzpicture}
\end{document}

另一种选择是先画填充部分，最后画边框，以确保边框线不被遮挡。

\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}[thick,fill opacity=.4,draw opacity=1]
\fill[yellow] (-9,-8) rectangle (9,8);
\fill[red] (-9,-6) rectangle (2,6);
\fill[orange,] (-3,-5) rectangle (9,5);
\fill[green,dotted] (-3,-4) rectangle (5,4);
\fill[blue] (-6,-2) rectangle (0,2);
%
\draw (-9,-8) rectangle (9,8);
\draw (-9,-6) rectangle (2,6);
\draw[dashed] (-3,-5) rectangle (9,5);
\draw[dotted] (-3,-4) rectangle (5,4);
\draw (-6,-2) rectangle (0,2);
\end{tikzpicture}
\end{document}

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