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Tikz；带圆角的装饰

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Tikz；带圆角的装饰

我不知道为什么，但是我不能使用带圆角的装饰。以下 MWE 失败ERROR: Dimension too large.：

\documentclass[beamer,tikz,preview]{standalone}
\usetikzlibrary{positioning,decorations.pathreplacing,decorations.pathmorphing}
\begin{document}
\begin{standaloneframe}
  \begin{tikzpicture}[main style/.style={
        rectangle,draw,fill=blue!30,decorate,
        decoration={zigzag,segment length=1mm,amplitude=.5mm}
      }]
    % Ok
    \node[main style] at (0,0) {ABC};
    % Fails
    \node[main style, rounded corners] at (0,-1) {DEF};
  \end{tikzpicture}
\end{standaloneframe}
\end{document}

答案1

这类装饰可能会发生这种情况。如果您选择的步长或幅度太小，或者执行类似 的操作rounded corners，您可能会收到dimension too large errors。但是，对我来说，zigzag圆角的 看起来像snake。所以也许这是可行的方法。

\documentclass[beamer,tikz,preview]{standalone}
\usetikzlibrary{positioning,decorations.pathreplacing,decorations.pathmorphing}
\begin{document}
\begin{standaloneframe}
  \begin{tikzpicture}[main style/.style={
        rectangle,draw,fill=blue!30,decorate,
        decoration={zigzag,segment length=1mm,amplitude=.5mm}
      },round main style/.style={
        rectangle,draw,fill=blue!30,decorate,
        decoration={snake,segment length=1mm,amplitude=.5mm}}]
    % Ok
    \node[main style] at (0,0) {ABC};
    % Fails
    \node[round main style] at (0,-1) {DEF};
  \end{tikzpicture}
\end{standaloneframe}
\end{document}

在此处输入图片描述

更新：感谢您澄清您的请求。我认为，这里有一些东西可以满足您的要求，并且基于Loop Space 的这个很好的答案也杰克的完整正弦和我对你的伴侣问题的回答。

\documentclass[beamer,tikz,preview,border=3.14mm]{standalone}
\usetikzlibrary{positioning,decorations.pathreplacing,decorations.pathmorphing,shapes.geometric,backgrounds}
\makeatletter % https://tex.stackexchange.com/a/38995/121799
\tikzset{
  use path/.code={\pgfsyssoftpath@setcurrentpath{#1}}
}
\makeatother
% based on https://tex.stackexchange.com/a/25689/121799
% actual code from https://tex.stackexchange.com/a/447546/121799
\pgfdeclaredecoration{zigzag cycle}{initial}{
\state{initial}[
        width=+0pt,
        next state=half up,
        persistent precomputation={\pgfmathsetmacro\matchinglength{
            \pgfdecoratedinputsegmentlength / int(\pgfdecoratedinputsegmentlength/\pgfdecorationsegmentlength)}
            \setlength{\pgfdecorationsegmentlength}{\matchinglength pt}
        }] {}
  \state{half up}[
        width=+.25\pgfdecorationsegmentlength,
        next state=big down]
        {\pgfcoordinate{zigzag-cycle-start}{\pgfqpoint{.25\pgfdecorationsegmentlength}{\pgfdecorationsegmentamplitude}}
        \pgfpathmoveto{\pgfqpoint{.25\pgfdecorationsegmentlength}{\pgfdecorationsegmentamplitude}}
    }
  \state{big down}[switch if less than=+.5\pgfdecorationsegmentlength to center finish,
                   width=+.5\pgfdecorationsegmentlength,
                   next state=big up]
  {
    \pgfpathlineto{\pgfqpoint{.5\pgfdecorationsegmentlength}{-\pgfdecorationsegmentamplitude}}
  }
  \state{big up}[switch if less than=+.5\pgfdecorationsegmentlength to center finish,
                 width=+.5\pgfdecorationsegmentlength,
                 next state=big down]
  {
    \pgfpathlineto{\pgfqpoint{.5\pgfdecorationsegmentlength}{\pgfdecorationsegmentamplitude}}
  }
  \state{center finish}[width=0pt, next state=final]{
  }
  \state{final}
  {
    \pgfpathlineto{\pgfpointanchor{zigzag-cycle-start}{center}}
  }
}



\begin{document}
\begin{standaloneframe}
 \begin{tikzpicture}[main style/.style={
        rectangle,draw=none}]
    % avoids the dimension too large error with ordinary zigzags
    \node[save path=\pathA,main style, rounded corners=3mm,inner sep=5pt] at (0,0) {ABC};
    \node[save path=\pathB,main style, rounded corners=3mm,inner sep=5pt] at (5,0) {ordinary zigzag};
    \begin{scope}[on background layer]
    \draw[decorate,decoration={zigzag,segment length=1mm,amplitude=.5mm},fill=blue!30] [use path=\pathA];
    \draw[decorate,decoration={zigzag,segment length=1mm,amplitude=.5mm},fill=blue!30] [use path=\pathB];
    \end{scope}
    % closed zigzag (it is OK to overwrite \pathA and \pathB after they have done their job)
    \node[save path=\pathA,main style, rounded corners=3mm,inner sep=5pt] at (0,-2) {ABC};
    \node[save path=\pathB,main style, rounded corners=3mm,inner sep=5pt] at (5,-2) {zigzag cycle};
    \begin{scope}[on background layer]
    \draw[decorate,decoration={zigzag cycle,segment length=1mm,amplitude=.5mm},fill=blue!30,sharp corners] [use path=\pathA];
    \draw[decorate,decoration={zigzag cycle,segment length=1mm,amplitude=.5mm},fill=blue!30,sharp corners] [use path=\pathB];
    \end{scope}
  \end{tikzpicture}
\end{standaloneframe}
\end{document}

在此处输入图片描述

答案2

（我知道这是一个老问题，但我刚刚回答了一个类似的问题，这让我想到了这个问题，并且我在 PGF 代码中挖了一些...）

正如其他答案所解释的那样，问题在于rounded corners当应用装饰时， 仍然有效，这会导致问题。使用路径，则可以在rounded corners构建路径后关闭，因为在适当的接合处插入键很容易。使用节点路径，则所有路径构建都在视线之外进行，这使得在正确的位置插入代码变得更加困难。

然而，在阅读有关装饰的文章时，我找到了/pgf/every decoration关键，这就是解决一切简而言之，通过将密钥放入sharp corners此密钥中，我们可以rounded corners在应用装饰之前禁用它，这似乎是银子弹解决这个问题。把它放在文档前言中可能足够安全，但它也可以在每个路径上使用它。

\documentclass{article}
%\url{https://tex.stackexchange.com/q/447533/86}
\usepackage{tikz}
\usetikzlibrary{
  positioning,
  decorations.pathreplacing,
  decorations.pathmorphing
}

\tikzset{
  disable rounded corners for decorations/.style={
    /pgf/every decoration/.style={
      /tikz/sharp corners
    },
  }
}

\begin{document}
\begin{tikzpicture}[
  main style/.style={
    rectangle,
    draw,
    fill=blue!30,
    disable rounded corners for decorations,
    decorate,
    decoration={
      zigzag,
      segment length=1mm,
      amplitude=.5mm
    }
  }
]
% Ok
\node[main style] at (0,0) {ABC};
% Fails
\node[main style, rounded corners] at (0,-1) {DEF};
\end{tikzpicture}
\end{document}

带圆角和锯齿状装饰的节点

（请注意，这并不能修复Dimension too large错误！）

这是一个更明显的例子：

\node[main style, rounded corners=1cm,minimum size=3cm] at (0,-3) {DEF};

更大的节点，带有圆角和 zizzag 装饰

左边是没有禁用键，右边是。

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