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tikz 错误“文件扫描使用 tikz cc 解析因子”

tag-icon • tag-icon tikz-pgf
tikz 错误“文件扫描使用 tikz cc 解析因子”

如果我执行以下代码，我会收到一条错误消息：

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calc, positioning}

\begin{document}
    \begin{tikzpicture}
    \def\mytheta{23.43}
    \draw (0, 0) -- (3, 0) -- (0, 1.3) -- cycle;
    \draw (3,0) -- +(1, 1.2) -- ($ (0, 1.3)+(1, 1.2) $) -- (0, 1.3);
    \draw (2.5, 0) arc (180:180-\mytheta:0.5);
    \node at ($ (3,0) + (180- 0.5*\mytheta:0.7) $) {$\theta$};
    \coordinate (origin) at (2.5, 1.2);
    \draw[rotate=-\mytheta] (origin) -- +(0.6, 0) node[right] {$x$}
    (origin) node[above] {$y$} -- + (0, -0.6) node[below] {$z$}
    (origin) circle (1.5pt);
    \fill (origin) circle (0.3pt);
    \coordinate (apex) at (1,1.6);
    \draw[dotted] (apex) -- +(10:0.4) coordinate (mup) (apex) -- +(-10:0.4) coordinate (mdown);
    \draw (mup) -- +(10:0.4) (mdown) -- +(-10:0.4);

    \draw ($ .5*(mup) + .5*(mdown) $) circle ({.2*tan(10)} and {.4*tan(10)});
    \draw ($ (apex) + {(.8*tan(10), 0)} $) circle ({.4*tan(10)} and {.8*tan(10)});
    \draw[dotted] (apex) -- +(-\mytheta:1) coordinate (Omega) (apex) -- +(180-\mytheta:0.2);
    \draw ($ (Omega) + (-\mytheta-40:0.3) $) arc (-\mytheta-40:-\mytheta+40:0.2); 
    \node at ($ (Omega) + (-\mytheta:0.5) $) {$\Omega$};
    \end{tikzpicture}
\end{document}

我该如何解决这个问题？也许问题出在代码的后半部分。

答案1

您的问题在于($ (apex) + {.8*tan(10)} $)，因为这是在坐标上添加一个数字。我理解您的意思是写成($ (apex) + ({.8*tan(10)},0) $)，在这种情况下，代码可以正常编译，输出为

在此处输入图片描述

\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{calc, positioning}

\begin{document}
    \begin{tikzpicture}
    \def\mytheta{23.43}
    \draw (0, 0) -- (3, 0) -- (0, 1.3) -- cycle;
    \draw (3,0) -- +(1, 1.2) -- ($ (0, 1.3)+(1, 1.2) $) -- (0, 1.3);
    \draw (2.5, 0) arc (180:180-\mytheta:0.5);
    \node at ($ (3,0) + (180- 0.5*\mytheta:0.7) $) {$\theta$};
    \coordinate (origin) at (2.5, 1.2);
    \draw[rotate=-\mytheta] (origin) -- +(0.6, 0) node[right] {$x$}
    (origin) node[above] {$y$} -- + (0, -0.6) node[below] {$z$}
    (origin) circle (1.5pt);
    \fill (origin) circle (0.3pt);
    \coordinate (apex) at (1,1.6);
    \draw[dotted] (apex) -- +(10:0.4) coordinate (mup) (apex) -- +(-10:0.4) coordinate (mdown);
    \draw (mup) -- +(10:0.4) (mdown) -- +(-10:0.4);

    \draw ($ .5*(mup) + .5*(mdown) $) circle ({.2*tan(10)} and {.4*tan(10)});
    \draw ($ (apex) + ({.8*tan(10)},0) $) circle ({.4*tan(10)} and {.8*tan(10)});
    \draw[dotted] (apex) -- +(-\mytheta:1) coordinate (Omega) (apex) -- +(180-\mytheta:0.2);
    \draw ($ (Omega) + (-\mytheta-40:0.3) $) arc (-\mytheta-40:-\mytheta+40:0.2); 
    \node at ($ (Omega) + (-\mytheta:0.5) $) {$\Omega$};
    \end{tikzpicture}
\end{document}

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