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Tikz 在循环内绘制前景

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Tikz 在循环内绘制前景

从回答开始这个问题，我修改了代码，以便有 4 种不同类型的单元格（而不是 2 种）。代码如下：

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\tikz[%
        every cell 0/.style={draw=black
                 , opacity=.5
                  ,  minimum height=0.1em
                  , outer sep=0pt},
       every cell 1/.style={draw=black
                  , fill=gray
                  , opacity=.5
                  ,  minimum height=0.1em
                  %, width=0.1em,
                  %,  depth=0.1em
                  , outer sep=0pt},
       every cell 2/.style={draw=red
                  , fill=gray
                  ,  minimum height=0.1em
                  %, width=0.1em,
                  %,  depth=0.1em
                  , outer sep=0pt},
       every cell 3/.style={draw=black
                  , fill=gray
                  ,  minimum height=0.1em
                  %, width=0.1em,
                  %,  depth=0.1em
                  , outer sep=0pt}
]
    \foreach \row [count=\y] in {%
        {0,0,0,0,0,1,1,1,0,0,0},%
        {0,0,0,1,1,1,0,1,1,0,0},%
        {0,0,0,1,0,0,0,0,1,0,0},%
        {0,0,0,2,0,0,0,1,1,0,0},%
        {0,0,0,3,0,0,0,1,0,0,0},%
        {0,0,1,1,0,0,0,1,0,0,0},%
        {0,0,1,1,0,0,0,1,1,1,1},%
        {0,0,1,1,0,0,0,0,0,0,0},%
        {1,1,1,1,0,0,0,0,0,0,0}}%
        \foreach \cell [count=\x] in \row  
            \path [every cell, every cell \cell]
                (\x,-\y) rectangle ++(1,1);
\end{document}

这是输出（缺少两个外部边）：

在此处输入图片描述

我想将对应于 2 的单元格放在前景中。实际上，只有在设置了不透明度参数的地方（即类型为 0,2 而不是 3 的单元格），红色边框才可见。特别是，我希望看到红色矩形，而无需为其他单元格设置不透明度。 这里类似的问题。

答案1

一个想法。创建以单元格值命名的图层，例如：

\pgfdeclarelayer{layer0}
\pgfdeclarelayer{layer1}
\pgfdeclarelayer{layer2}
\pgfdeclarelayer{layer3}

并按所需的顺序设置它们，即：

\pgfsetlayers{layer0,layer1,main,layer3,layer2}

绘制图层中的每个单元格layer\cell。这是实现这个想法的完整代码（请注意，我添加了very thick单元格 2 的样式）：

\documentclass{standalone}
\usepackage{tikz}
\pgfdeclarelayer{layer0}
\pgfdeclarelayer{layer1}
\pgfdeclarelayer{layer2}
\pgfdeclarelayer{layer3}
\pgfsetlayers{layer0,layer1,main,layer3,layer2}

\begin{document}
\tikz[%
      every cell 0/.style={draw=black
                  , opacity=.5
                  ,  minimum height=0.1em
                  , outer sep=0pt},
      every cell 1/.style={draw=black
                  , fill=gray
                  , opacity=.5
                  ,  minimum height=0.1em
                  , outer sep=0pt},
      every cell 2/.style={draw=red, very thick,
                  , fill=gray
                  ,  minimum height=0.1em
                  , outer sep=0pt},
      every cell 3/.style={draw=black
                  , fill=gray
                  ,  minimum height=0.1em
                  %, width=0.1em,
                  %,  depth=0.1em
                  , outer sep=0pt}
] {
\foreach \row [count=\y] in {%
    {0,0,0,0,0,1,1,1,0,0,0},%
    {0,0,0,1,1,1,0,1,1,0,0},%
    {0,0,0,1,0,0,0,0,1,0,0},%
    {0,0,0,2,0,0,0,1,1,0,0},%
    {0,0,0,3,0,0,0,1,0,0,0},%
    {0,0,1,1,0,0,0,1,0,0,0},%
    {0,0,1,1,0,0,0,1,1,1,1},%
    {0,0,1,1,0,0,0,0,0,0,0},%
    {1,1,1,1,0,0,0,0,0,0,0},}%
    \foreach \cell [count=\x] in \row  {
      \begin{pgfonlayer}{layer\cell}
        \path [every cell, every cell \cell]
            (\x,-\y) rectangle ++(1,1);
      \end{pgfonlayer}
    }
}
\end{document}

结果如下：

结果

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