在 Latex 中使用 Tikz 编辑 2D 绘图

Question

我正在尝试使用 Tikz 编辑 2D 图形。我当前的代码和图如下：

    \usepackage{tikz}
    \usepackage{graphicx}
    \usepackage{amsmath}
    \usepackage{amssymb}
    \usepackage{xcolor}`

    \begin{document}

    \begin{figure}[hbt]
    \centering
    \begin{tikzpicture}[scale=350]
    \centering
    \draw[blue,thick] (0,0) -- (0.0219837,0)-- (0.0219837,0.0168148)-- (0.0056579,0.0168148) -- (0.0052959,0.0127) -- (0.0027051,0.0127) -- (0.0027051,0.0142494)--(0,0.0142494) -- cycle;
    %\filldraw[fill=green!20,draw=green!50!black] 

   \draw[line width=1mm, red] (0.0024, 0.0142495) -- (0.0024, 0.01225);
   \draw[line width=1mm, green] (0.0024, 0.0122495) -- (0.0024, 0.002);
   \draw[line width=1mm, black] (0.0024, 0.002, 0.0) -- (0.0024, 0.0);
   \draw[line width=0.55mm, magenta] (0.0, 4.0E-8) -- (0.0219837, 4.0E-8);

   \end{tikzpicture}
   \caption{2D domain.}
   \label{fig:2D Domain}
   \end{figure}

   \end {document}

这为我提供了下图：

现在，我想按如下方式编辑我的图形：即每条新添加的线（3 条垂直线、1 条水平线）都应具有图中所示的相应颜色的图例。例如，我使用了红色、绿色、蓝色和洋红色。另外，我希望它们对齐。

Answer 1

只需在所需位置绘制线条并在其末端添加一个节点即可。例如：

\draw[line width=1mm, red] (0.005,0.01) -- (0.0075,0.01) node [right] {Line 1};

我不知道您是否需要保留线宽，如果不需要，请将其删除。

这可能是完整的代码：

\documentclass[tikz,border=5mm]{standalone}

\begin{document}
\begin{tikzpicture}[scale=350]
\centering
\draw[black,thick] (0,0) -- (0.0219837,0) -- (0.0219837,0.0168148) -- (0.0056579,0.0168148) --
                   (0.0052959,0.0127) -- (0.0027051,0.0127) -- (0.0027051,0.0142494) -- (0,0.0142494) -- cycle;

\draw[line width=1mm, red]        (0.0024, 0.0142495) -- (0.0024, 0.01225);
\draw[line width=1mm, green]      (0.0024, 0.0122495) -- (0.0024, 0.002);
\draw[line width=1mm, blue]       (0.0024, 0.002)     -- (0.0024, 0.0);
\draw[line width=0.55mm, magenta] (0.0, 4.0E-8)       -- (0.0219837, 4.0E-8);
% Legend
\draw[line width=1mm, red]        (0.005,0.01)   -- (0.0075,0.01)   node [right] {Line 1};
\draw[line width=1mm, green]      (0.005,0.0085) -- (0.0075,0.0085) node [right] {Line 2};
\draw[line width=1mm, blue]       (0.005,0.007)  -- (0.0075,0.007)  node [right] {Line 3};
\draw[line width=0.55mm, magenta] (0.005,0.0055) -- (0.0075,0.0055) node [right] {Line 4};
\end{tikzpicture}
\end{document}