如何使用 Tikz 为两个圆弧之间的区域着色

Question

我必须绘制星形部分，但我不知道如何填充我所绘制的圆弧之间的区域。以下是代码

\documentclass{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
\draw [help lines](0,0) grid (10,10);
\draw [thick] (5,0) -- (1,8);
\draw [thick] (5,0) -- (9,8);
\draw [thick] (5,0) ++(60.43:8.94) arc (60.43:116.57:8.94);
\draw [thick] (5,0) ++(63.43:3) arc (63.43:116.57:3) node[left,sloped,rotate=35,font=\footnotesize]{$\approx2\rho_0$};
\draw [thick] (5,0) ++(59:5) arc (59:116.57:5) node[left,sloped,rotate=35,font=\footnotesize]{$\approx0.5\rho_0$};
\draw [thick] (5,0) ++(63.43:7) arc (63.43:116.57:7);
\draw [thick] (5,0) ++(60.43:8.5) arc (60.43:116.57:8.5);
\draw [thick] (5,0) -- (5.35,-0.22);
\draw  [<->](9,7.518) -- (9.175,7.88) node[midway,right,sloped,rotate=-90] {10 cm};;
\draw  [<->](7.43,4.37) -- (9,7.518) node[midway,below,sloped] {(1-2) km};
\draw  [<->](5.175,-0.11) -- (7.43,4.37) node[midway,below,sloped] {(9-12) km};     
\node at (5, 0) [left,rotate=35,font=\footnotesize]{$(3-9)\rho_0$}; 
\end{tikzpicture}

\end{document}

我是 Tikz 的新手，所以不太熟练，谢谢！

Answer 1

如果每个部分/环都应该填充不同的颜色，那么您可以从外面绘制它们，部分覆盖较大的部分。

我正在使用该siunitx包及其…range宏。

这ρ在原点处有点欺骗性，因为它使用 0.0001（即 1µm）的半径来获得该节点的正确方向。

代码

\documentclass[tikz]{standalone}
\usepackage{siunitx}
\sisetup{range-phrase=\dots, range-units=bracket}
\usetikzlibrary{arrows.meta, calc, quotes}
\tikzset{
  Measure/.tip={Latex[] . Bar[sep=+0pt +-.5]},
  pics/Measure/.style args={#1--#2}{code={
    \path[Measure-Measure, midway, auto=right, sloped, draw, pic actions]
      ($(#1)!5pt!-90:(#2)$) -- node[style/.expand once=\tikzpictextoptions]{\tikzpictext}
      ($(#2)!5pt!90:(#1)$);}}}
\begin{document}
\begin{tikzpicture}[start angle=60, delta angle=60, thick]
\coordinate (O) at (0, 0);
\foreach[count=\i] \r/\t/\c in {
  8.5//red,
  8  //orange,
  6  //yellow,
  4  /\approx 0.5 \rho_0/green,
  2  /\approx 2   \rho_0/blue!50,
  0.001  /\numrange{3}{9}\rho_0/black%
} \draw[fill=\c] (O) -- (\pgfkeysvalueof{/tikz/start angle}:\r) coordinate (s-\i)
     arc[radius=\r] node[at end, sloped, left]{$\t$} -- cycle;
%\foreach \pair/\t/\s in {
\pic["\qtyrange{9}{12}{\kilo\metre}"] {Measure = O--s-4};
\pic["\qtyrange{1} {2}{\kilo\metre}"] {Measure = s-4--s-2};
\pic["\qty{10}{\centi\metre}" {right, rotate=-90}, arrows={[scale length=.5]}] {Measure = s-2--s-1};
\end{tikzpicture}
\end{document}

输出

Answer 2

尝试根据您的需要调整此代码：

\documentclass{article}
\usepackage{tikz}

\begin{document}
    \begin{tikzpicture}
        \draw[fill=red] (0,0)--(50:6) arc (50:130:6)--cycle;
        \draw[fill=white] (0,0)--(50:5) arc (50:130:5)--cycle;
        \draw[fill=green] (0,0)--(50:3.5) arc (50:130:3.55)--cycle;
    \end{tikzpicture}
\end{document}

输出：