我有一组弯曲轴的图。
我想要从中心开始着色轴外轴上的圆圈逐渐变为白色。使用center=red将阴影的中心放在阴影区域的中心，而不是图表的中心，我无法组合top color=red, left color=red, right color=white, bottom color=white。
如何使用 TikZ 实现此目的？我当前的 MWE 如下。
\documentclass[class=minimal,border=0pt]{standalone}
\usepackage{textcomp}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\shade [top color=red] (0,0) -- (6:5) arc (6:-140:5) -- (0,0);
\draw [color=blue] plot [smooth] coordinates {(0,0) (-28:1) (-56:2) (-84:3) (-112:4) (-140:5)}; \fill [fill=white] plot [smooth] coordinates {(0,0) (-28:1) (-56:2) (-84:3) (-112:4) (-140:5)};
\foreach \i in {5,...,1} {
\node [anchor=south] at (10:\i) {W\i};
\draw [black, dashed, very thin] ++(10:\i) arc (10:-195:\i);
}
\foreach \i in {0,...,3} {
\pgfmathsetmacro\angleresult{\i * -60 };
\pgfmathsetmacro\mylabel{\i * 60 };
\draw [gray, dashed] (0,0) -- (\angleresult:5.5);
\node [anchor=north] at (\angleresult:5.5) {\mylabel\textdegree};
}
\draw [black, very thick](0,0) -- (6:5);
\end{tikzpicture}%
\end{document}
答案1
你想要这样的东西吗？
\documentclass[tikz,border=5pt]{standalone}
\usepackage{textcomp}
\begin{document}
\begin{tikzpicture}
\begin{scope}
\clip (0,0) -- (6:5) arc (6:-140:5) -- (0,0);
\shade [inner color=red, outer color=white] (0,0) circle (5);
\end{scope}
\draw [color=blue] plot [smooth] coordinates {(0,0) (-28:1) (-56:2) (-84:3) (-112:4) (-140:5)}; \fill [fill=white] plot [smooth] coordinates {(0,0) (-28:1) (-56:2) (-84:3) (-112:4) (-140:5)};
\foreach \i in {5,...,1} {
\node [anchor=south] at (10:\i) {W\i};
\draw [black, dashed, very thin] ++(10:\i) arc (10:-195:\i);
}
\foreach \i in {0,...,3} {
\pgfmathsetmacro\angleresult{\i * -60 };
\pgfmathsetmacro\mylabel{\i * 60 };
\draw [gray, dashed] (0,0) -- (\angleresult:5.5);
\node [anchor=north] at (\angleresult:5.5) {\mylabel\textdegree};
}
\draw [black, very thick](0,0) -- (6:5);
\end{tikzpicture}%
\end{document}