迭代重复 tikz 矩形中的节点

Question

所以我想填充一个矩形，像下面这样，但不需要循环和获取坐标的麻烦。

我想要一个神奇的命令，将我的符号重复放置在矩形内。最好给出开始和结束coordinate；

\automagicGrid[step size x=0.1, step size y=0.1]{(rect.south west)}{(rect.north east)}{\node{$\otimes$}}

这是一个手动的、糟糕的操作方法的例子。

\documentclass[margin=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{fit}

\begin{document}
  \begin{tikzpicture}
    \makeatletter
    \tikzset{autofit/.style={
          % autofit: automagically generate awesome anchorpoints
          fit={(\pgf@pathminx,\pgf@pathminy) (\pgf@pathmaxx,\pgf@pathmaxy)},
          inner sep=0pt
        }
    }
    \makeatother
    % Draw my rectangle
    \def\rectH{2}
    \def\rectW{2}
    \draw(0,0) rectangle (\rectW,\rectH) node[autofit](rect){};
    % I want this command
    % \automagicGrid[step size x=0.1, step size y=0.1]{(rect.south west)}{(rect.north east)}{\node{$\otimes$}}

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%  Below is what I DON'T want  %%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \def\xStart{.2}
    \def\xStepSize{.3}
    \edef\paddingX{.1}
    \pgfmathsetmacro\xStep{\xStart+\xStepSize}
    \pgfmathsetmacro\xEnd{\rectH-\paddingX}

    \def\yStart{.2}
    \def\yStepSize{.3}
    \edef\paddingY{.1}
    \pgfmathsetmacro\yStep{\yStart+\xStepSize}
    \pgfmathsetmacro\yEnd{\rectH-\paddingY}

    \foreach \x in {\xStart,\xStep,...,\xEnd}{
        \foreach \y in {\yStart, \yStep,...,\yEnd}{
            \node at (\x+\paddingX/2,\y+\paddingY/2){$\otimes$};
          }
      }
  \end{tikzpicture}
\end{document}

结果如下：

不过，如果有人能找到一种干净的方法来获取所述坐标，我会很高兴，因为这才是真正的麻烦。

Answer 1

我不知道如何去掉，\foreach但可以将它们放入样式中。使用我们path picture现在知道要填充的东西有多大，并且可以相应地拨动循环参数。

\documentclass[margin=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{fit,calc}
\pgfkeys{/automagic/.cd,
  grid/.style={draw=gray!50,thin},
  x distance/.initial=3mm,
  y distance/.initial=3mm,
  x padding/.initial=2.5mm,
  y padding/.initial=2.5mm,
  distance/.code={\pgfkeys{/automagic/x distance=#1,/automagic/y distance=#1}},
  symbol/.initial= $\otimes$
}
\tikzset{automagic grid/.style={/utils/exec=\pgfkeys{/automagic/.cd,#1},
      path picture={
          \path[/automagic/grid]
          let
          \p1=($(path picture bounding box.north east)-(path picture bounding box.south west)$),
          \n1={int(0.5+(\x1-\pgfkeysvalueof{/automagic/x padding})/\pgfkeysvalueof{/automagic/x distance})},
          \n2={int(0.5+(\y1-\pgfkeysvalueof{/automagic/y padding})/\pgfkeysvalueof{/automagic/y distance})}
          in
          foreach \XX in {1,...,\n1}
            {
              foreach \YY in {1,...,\n2} {
                  ([
                      xshift={(\XX-1)*\pgfkeysvalueof{/automagic/x distance}+\pgfkeysvalueof{/automagic/x padding}},
                      yshift={(\YY-1)*\pgfkeysvalueof{/automagic/y distance}+\pgfkeysvalueof{/automagic/y padding}}
                    ]%
                  path picture bounding box.south west%
                  ) node{\pgfkeysvalueof{/automagic/symbol}}
                }
            };
        }}}
\begin{document}
  \begin{tikzpicture}
    % Draw my rectangle
    \def\rectH{2}
    \def\rectW{2}
    \draw[automagic grid](0,0) rectangle ++(\rectW,\rectH);
  \end{tikzpicture}
\end{document}