tikz - 在镜像部分应用奇偶规则

Question

我想应用奇偶规则来填充圆和我的形状之间的区域：

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
    \begin{tikzpicture}[scale=2]
        \draw[fill=gray!30,even odd rule] (0,0) circle (0.5)
        (0,-0.16) to[out=120,in=0]  (-0.131,0) to[out=180,in=70] (-0.27,-0.23) to[out=-45,in=180] (-0.15,-0.3) to[out=0,in=-135] (0,-0.18);
        \begin{scope}[yscale=1,xscale=-1]
            \draw (0,-0.16) to[out=120,in=0]  (-0.131,0) to[out=180,in=70] (-0.27,-0.23) to[out=-45,in=180] (-0.15,-0.3) to[out=0,in=-135] (0,-0.18);
        \end{scope}
    \end{tikzpicture}
\end{document}

但是镜子部分也已经被填满了！

Answer 1

even odd rule仅适用于当前路径，不适用于添加到额外范围的路径。但是，您可以在路径内开启[xscale=-1]。这让您能够及时做好准备，例如为星球大战日做好准备。愿第四个与你同在！

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
    \begin{tikzpicture}[scale=2]
        \draw[fill=gray!30,even odd rule] (0,0) circle (0.5)
        (0,-0.16) to[out=120,in=0]  (-0.131,0) to[out=180,in=70] (-0.27,-0.23)
        to[out=-45,in=180] (-0.15,-0.3) to[out=0,in=-135] %(0,-0.16)
        (0,-0.16) [xscale=-1] to[out=120,in=0]  (-0.131,0) to[out=180,in=70]
            (-0.27,-0.23) to[out=-45,in=180] (-0.15,-0.3) to[out=0,in=-135]
        cycle;
    \end{tikzpicture}
\end{document}