我希望下面的原子符号颜色和样式与封闭节点样式相同；我该怎么做？有没有办法引用的线条样式\tikzlastnode？
\documentclass[border=3mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning, calc}
\begin{document}
\title{science symbol}
\begin{tikzpicture}[>=latex,
font=\sffamily,
atom/.style = {circle, minimum size=#1,
append after command={%
\pgfextra{
\foreach \ang in {0,120,240}
\draw[rotate around={\ang:(0,0)}] (\tikzlastnode.center) ellipse (0.45*#1 and 0.15*#1);
\fill (\tikzlastnode.center) circle (0.05*#1);
}
}
}
]
\node[draw, atom=10mm] (C1) at (0,0){};
\node[draw, very thin, red, atom=10mm] (C2) at (2cm,0){};
\node[draw, thick, green, atom=10mm] (C3) at (2cm,2cm){};
\draw[->] (C1) -- (C2);
\draw[->] (C1) -- (C3);
\end{tikzpicture}
\end{document}
答案1
我又摸索着解决了这个问题，并找到了一种替代方法，使用\pgfdeclareshape而不是append after command。（为什么当我做这种事时，总感觉像是一次痛苦的胜利？？？）我使用的其他参考问题是
但它基本上只是如何使用形状\pgfdeclareshape来工作circle，看看https://svn.ssec.wisc.edu/repos/geoffc/LaTeX/beamerposter_UW-SSEC/pgfmoduleshapes.code.tex源代码。
\documentclass[border=3mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning, calc}
\begin{document}
\title{science symbol}
\pgfdeclareshape{atomshape}{%
\inheritsavedanchors[from=circle]%
\inheritanchorborder[from=circle]%
\inheritanchor[from=circle]{center}%
%
\backgroundpath{%
\pgfpathcircle{\pgfpointorigin}{0.1*\radius}
\pgfusepath{fill}
\pgfpathcircle{\pgfpointorigin}{\radius}%
\foreach\ang in {0,120,240}{
\pgftransformrotate{\ang}
\pgfpathellipse{\pgfpointorigin}
{\pgfpoint{0.9*\radius}{0cm}}
{\pgfpoint{0cm}{0.3*\radius}}
}
}%
}
\begin{tikzpicture}[>=latex,
font=\sffamily,
atom/.style = {atomshape, minimum size=#1}
]
\node[draw, atom=10mm] (C1) at (0,0){};
\node[draw, very thin, red, atom=10mm] (C2) at (2cm,0){};
\node[draw, thick, green, atom=10mm] (C3) at (2cm,2cm){};
\draw[->] (C1) -- (C2);
\draw[->] (C1) -- (C3);
\end{tikzpicture}
\end{document}
