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Tikz 中标记为外角而不是内角？

tag-icon • tag-icon tikz-pgf diagrams tkz-euclide angle tikz-angles
Tikz 中标记为外角而不是内角？

因此，经过大量艰苦的研究（对于一些人们认为应该很简单的事情），我弄清楚了如何在图表中绘制角度！我使用的包是tkz-euclide，它似乎足够简单易用。

但是，每当我绘制力图时，角度都是在图形外部绘制，而不是在图形内部。底部模型角度不正确

有人能帮我得到图内下方的角度吗？我知道可能是箭头让人困惑tkz-euclide，但我需要它们。我的完整代码如下：

\documentclass{article}
%\documentclass[tikz]{standalone}
\usepackage{tikz,tkz-euclide} 
\usetkzobj{all}

\begin{document}

\begin{center}

\begin{tikzpicture}[>=latex]
    \draw[style=help lines] ;

%%  The lines for the figures, going from node to node.
\draw[thick] (-2.2,2.2) -- (0,0);
\draw[thick,->] (-2.2,2.2) -- (2,2.2);
\draw[thick,->] (0,0) -- (0,-3);
\draw[thick,->] (0,0) -- (1.5,-1.5);
\draw[thick,->] (1.5,-1.5) -- (0,-3);
\draw[thick,->] (.12,.12) -- (2,2);
\draw[thick,->] (.12,.12) -- (1.62, -1.38);
%%  First batch of coordinates for the angle with the theta.
\coordinate (A) at (-2.2,2.2);
\coordinate (B) at (2,2.2);
\coordinate (C) at (0,0);
%%  2nd batch of coordinates for the angle with the lower theta.
\coordinate (D) at (1.5, -1.5);
\coordinate (E) at (0,-3);
%%  Nodes set up for the various symbols around the figure.
\node (F) at (1.4,.9) {\(F_N\)};
\node (G) at (1.22,-.4) {\(F_\perp\)};
\node (H) at (1.13,-2.45) {\(F_\top\)};
\node (I) at (-.29, -1.50) {\(w\)};
%%  The two angles are described here.
\tkzMarkAngle[fill=orange,size=0.7,opacity=.4](C,A,B)
\tkzLabelAngle[pos = 0.45](C,A,B){\({\theta}_0\)}

\tkzMarkAngle[fill=orange,size=0.5,opacity=.4](C,E,D)
\tkzLabelAngle[pos = 0.5](C,E,D){\({\theta}_u\)}

\end{tikzpicture}
\end{center}
\end{document}

答案1

它与箭头无关。标记两个可能的角度中的哪一个取决于您在 中指定坐标的顺序\tkzMarkAngle。因此，您只需使用\tkzMarkAngle[fill=orange,size=0.5,opacity=.4](D,E,C)而不是\tkzMarkAngle[fill=orange,size=0.5,opacity=.4](C,E,D)。

在此处输入图片描述

\documentclass{article}
%\documentclass[tikz]{standalone}
\usepackage{tikz,tkz-euclide} 
\usetkzobj{all}

\begin{document}

\begin{center}

\begin{tikzpicture}[>=latex]
    \draw[style=help lines] ;

%%  The lines for the figures, going from node to node.
\draw[thick] (-2.2,2.2) -- (0,0);
\draw[thick,->] (-2.2,2.2) -- (2,2.2);
\draw[thick,->] (0,0) -- (0,-3);
\draw[thick,->] (0,0) -- (1.5,-1.5);
\draw[thick,->] (1.5,-1.5) -- (0,-3);
\draw[thick,->] (.12,.12) -- (2,2);
\draw[thick,->] (.12,.12) -- (1.62, -1.38);
%%  First batch of coordinates for the angle with the theta.
\coordinate (A) at (-2.2,2.2);
\coordinate (B) at (2,2.2);
\coordinate (C) at (0,0);
%%  2nd batch of coordinates for the angle with the lower theta.
\coordinate (D) at (1.5, -1.5);
\coordinate (E) at (0,-3);
%%  Nodes set up for the various symbols around the figure.
\node (F) at (1.4,.9) {\(F_N\)};
\node (G) at (1.22,-.4) {\(F_\perp\)};
\node (H) at (1.13,-2.45) {\(F_\top\)};
\node (I) at (-.29, -1.50) {\(w\)};
%%  The two angles are described here.
\tkzMarkAngle[fill=orange,size=0.7,opacity=.4](C,A,B)
\tkzLabelAngle[pos = 0.45](C,A,B){\({\theta}_0\)}

\tkzMarkAngle[fill=orange,size=0.5,opacity=.4](D,E,C)
\tkzLabelAngle[pos = 0.5](C,E,D){\({\theta}_u\)}

\end{tikzpicture}
\end{center}
\end{document}

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