使用 tikz 标记三维框的角

Question

我在 Tikz 中有一个长方体。我想标记长方体的角，但我遇到了麻烦。以下是生成长方体的代码：

\begin{tikzpicture}
\pgfmathsetmacro{\cubex}{4}
\pgfmathsetmacro{\cubey}{5}
\pgfmathsetmacro{\cubez}{3}
\draw (0,0,0) -- ++(-\cubex,0,0) -- ++(0,-\cubey,0) -- ++(\cubex,0,0) -- cycle;
\draw (0,0,0) -- ++(0,0,-\cubez) -- ++(0,-\cubey,0) -- ++(0,0,\cubez) -- cycle;
\draw (0,0,0) -- ++(-\cubex,0,0) -- ++(0,0,-\cubez) -- ++(\cubex,0,0) -- cycle;
\draw[dashed] (-\cubex,0,-\cubez) -- ++(0,-\cubey,0);
\draw[dashed] (-\cubex,-\cubey,-\cubez) -- node[below]{A} (-\cubex,-\cubey,0);
\draw[dashed] (-\cubex,-\cubey,-\cubez) -- (0,-\cubey,-\cubez);
\end{tikzpicture}

我想用字母 A 到 H 标记每个角。我该怎么做？另外，我想让 A 位于底部、前部、左角下方。

Answer 1

\documentclass[tikz,border=3mm]{standalone}
\usepackage{tikz-3dplot}

\begin{document}
\begin{tikzpicture}
\pgfmathsetmacro{\cubex}{4}
\pgfmathsetmacro{\cubey}{5}
\pgfmathsetmacro{\cubez}{3}
\draw   (0,0,0) node[right] {C} 
    -- ++(-\cubex,0,0) node[left]  {B} 
    -- ++(0,-\cubey,0) node[left]  {A} 
    -- ++(\cubex,0,0)  node[right] {D} -- cycle;
\draw   (0,0,0) -- ++(0,0,-\cubez) node[right] {G} 
                -- ++(0,-\cubey,0) node[right] {H} -- ++(0,0,\cubez);
\draw   (0,0,0) -- ++(-\cubex,0,0) 
                -- ++(0,0,-\cubez) node[left]  {F} -- ++( \cubex,0,0);
\draw[dashed] (-\cubex,0,-\cubez) -- ++(0,-\cubey,0);
\draw[dashed] (-\cubex,-\cubey,-\cubez) node[left]{E} --  (-\cubex,-\cubey,0);
\draw[dashed] (-\cubex,-\cubey,-\cubez)  -- (0,-\cubey,-\cubez);
\end{tikzpicture}
\end{document}