桌子，即 Tikz 中供人就餐的家具

Question

你会如何用 Tikz 画出一张桌子，也就是人们吃饭的家具，就像下面这样？一如既往，我非常感谢你巧妙的 tikz 构造！

Answer 1

这是一个粗略的解决方案。随着时间和重构，可能会写出一个优雅的解决方案。

关键部分是使用三维坐标系。

我只画了表格。

\begin{tikzpicture}[fill=lightgray]

%legs
\foreach \leg in {(0.3,0,0),(4.9,0,0),(4.9,0,-2.7),(0.3,0,-2.7)}{
\begin{scope}[shift=\leg,draw=red]
\draw[fill] (0,0,0) -- (0,0,-0.2) -- (0,2,-0.2) -- (0,2,0);
\draw[fill] (0,0,0) rectangle (-0.2,2,0);
\end{scope}}

%table
\begin{scope}[draw=blue,shift={(0,2,0)}]
\draw[fill] (0,0,0) -- (5,0,0) -- (5,0,-3) -- (0,0,-3) -- cycle;
\draw[fill] (0,0,0) -- (5,0,0) -- (5,-0.1,0)-- (0,-0.1,0) -- cycle;
\draw[fill] (5,0,0) -- (5,0,-3) -- (5,-0.1,-3)-- (5,-0.1,0) -- cycle;
\end{scope}

\end{tikzpicture}

结果是

Hera 是另一个版本的代码。它比较长，但它使用在开头定义的宏，以便于修改表格。

\begin{tikzpicture}[fill=lightgray]

%table dimensions
\pgfmathsetmacro{\tablelength}{5};
\pgfmathsetmacro{\tablewidth}{3};
\pgfmathsetmacro{\tablethickness}{0.2};

%leg dimensions
\pgfmathsetmacro{\leglength}{\tablewidth};
\pgfmathsetmacro{\halflegwidth}{0.5*\tablethickness};

\pgfmathsetmacro{\shift}{2*\halflegwidth};

%legs
\foreach \leg in {(0+\shift,0,0),(\tablelength-\shift,0,-\shift),
                  (\tablelength-\shift,0,-\tablewidth+\shift),
                  (0+\shift,0,-\tablewidth+\shift)}{
    \path[shift=\leg,draw=red,fill] 
        (\halflegwidth,0,\halflegwidth) -- (\halflegwidth,0,-\halflegwidth) -- 
        (\halflegwidth,\leglength,-\halflegwidth) --    
               (\halflegwidth,\leglength,\halflegwidth)

        (\halflegwidth,0,\halflegwidth) rectangle 
              (-\halflegwidth,\leglength,\halflegwidth);
}

%table
\path[draw=blue,shift={(0,\leglength,0)},fill]
    (0,0,0) -- (\tablelength,0,0) -- (\tablelength,0,-\tablewidth) -- 
     (0,0,-\tablewidth) -- cycle

    (0,0,0) -- (\tablelength,0,0) -- (\tablelength,-\tablethickness,0)--
     (0,-\tablethickness,0) -- cycle

    (\tablelength,0,0) -- (\tablelength,0,-\tablewidth) -- 
     (\tablelength,-\tablethickness,-\tablewidth)--
    (\tablelength,-\tablethickness,0) -- cycle;

\end{tikzpicture}