绘制一个标记四面体

Question

如何编写下图中给出的四面体（避开箭头）的 LaTex 代码：

Answer 1

下面的代码使用了tikz包。

\documentclass{standalone}

\usepackage{tikz}

\begin{document}

\begin{tikzpicture}

    \coordinate (a) at (4,2.5);
    \coordinate (b) at (3,.8);
    \coordinate (c) at (5,0);
    \coordinate (d) at (5.3,1.2);
    \coordinate (e) at (0,0);

    \draw[thick, fill=black!10] (a) -- (b) -- (e) -- cycle;
    \draw[thick, fill=black!20] (a) -- (b) -- (c) -- (d) -- cycle;
    \draw[thick, fill=black!30] (b) -- (c) -- (e) -- cycle;
    \draw[very thick] (a) -- (c);
    \draw[thick, dash dot dot] (b) -- (d);

    \fill[black!20, draw=black, thick] (a) circle (3pt) node[black, above right] {$a$};
    \fill[black!20, draw=black, thick] (b) circle (3pt) node[black, above left] {$b$};
    \fill[black!20, draw=black, thick] (c) circle (3pt) node[black, below right] {$c$};
    \fill[black!20, draw=black, thick] (d) circle (3pt) node[black, above right] {$d$};
    \fill[black!20, draw=black, thick] (e) circle (3pt) node[black, below left] {$e$};

\end{tikzpicture}

\end{document}

结果是

您可以进一步调整位置和anchorsnode以获得您想要的标签对齐方式。

Answer 2

\documentclass{article}
\usepackage{pst-solides3d}

\begin{document}
\psset{viewpoint=40 -10 10 rtp2xyz,lightsrc=viewpoint,Decran=30}
\begin{pspicture}[solidmemory](-2,-2)(3,3)
\psSolid[object=tetrahedron,r=3,action=draw*,name=T]% without 0
\psSolid[object=point,definition=solidgetsommet,args=T 0,text=d,pos=uc]% Point T0 %(top)
\psSolid[object=point,definition=solidgetsommet,args=T 1,text=c,pos=cl]% Point T1
\psSolid[object=point,definition=solidgetsommet,args=T 2,text=b,pos=dc]% Point T1
\psSolid[object=point,definition=solidgetsommet,args=T 3,text=a,pos=cr]% Point T1
\end{pspicture}
\end{document}