☰

如何旋转标签使其基线与角平分线平行？

tag-icon • tag-icon pstricks pst-eucl
如何旋转标签使其基线与角平分线平行？

如何逆时针旋转标签，使其基线与角平分线平行？

在此处输入图片描述

\documentclass[border=0pt,pstricks]{standalone}
\usepackage{pst-eucl}
\psset{PointName=none,PointSymbol=none}
\begin{document}

\begin{pspicture}[showgrid=false](6,6)
    \pstGeonode[CurveType=polyline](1,1){A}(5,5){B}(4,1){C}
    \pstBissectBAC[linestyle=dotted,linecolor=red]{A}{B}{C}{C'}
    \pstMarkAngle[MarkAngleRadius=1.5,LabelSep=0.75]{A}{B}{C}{\tiny$180^\circ-\theta$}
\end{pspicture}

\end{document}

答案1

\documentclass[border=0pt,pstricks]{standalone}
\usepackage{pst-eucl}
\psset{PointName=none,PointSymbol=none}
\begin{document}

\begin{pspicture}[showgrid=false](6,6)
    \pstGeonode[CurveType=polyline](1,1){A}(5,5){B}(4,1){C}
    \pstBissectBAC[linestyle=dotted,linecolor=red]{A}{B}{C}{B'}
    \pstMarkAngle[MarkAngleRadius=1.6,LabelSep=1]{A}{B}{C}{}
    \pcline[linestyle=none](B')(B)\ncput[nrot=:U,npos=0.84]{\tiny$180^\circ-\theta$}
\end{pspicture}

\end{document}

不知道的情况下的解决方案B'

\documentclass{article}
\usepackage{pst-eucl}
\begin{document}    
\begin{pspicture}[showgrid=false](6,6)
    \pstGeonode[CurveType=polyline](1,1){A}(5,5){B}(4,1){C}
    \pstMarkAngle[MarkAngleRadius=1.6,LabelSep=1]{A}{B}{C}{}
  \pcline[linestyle=none](!
    \psGetNodeCenter{A} \psGetNodeCenter{B} \psGetNodeCenter{C} 
    
    /LengthBA B.x A.x sub dup mul B.y A.y sub dup mul add sqrt def
    
    /LengthBC C.x A.x sub dup mul C.y A.y sub dup mul add sqrt def
    
    /Factor LengthBC LengthBA div def
    
    A.x B.x sub Factor mul B.x add /A.x ED
    
    A.y B.y sub Factor mul B.y add /A.y ED
    
    A.x C.x add 2 div A.y C.y add 2 div )(B)\ncput[nrot=:U,npos=0.84]{\tiny$180^\circ-\theta$}

\end{pspicture}

\end{document}

答案2

尽管它不够优雅，但我还是得到了解决方案。

在此处输入图片描述

\documentclass[border=0pt,pstricks]{standalone}
\usepackage{pst-eucl}
\psset{PointName=none,PointSymbol=none}
\begin{document}

\begin{pspicture}[showgrid=false](6,6)
    \pstGeonode[CurveType=polyline](1,1){A}(5,5){B}(4,1){C}
    \pstMarkAngle[MarkAngleRadius=1.6,LabelSep=1]{A}{B}{C}{\rput{(B)}(0,0){\tiny$180^\circ-\theta$}}
\end{pspicture}

\end{document}

顺时针旋转：

在此处输入图片描述

\documentclass[border=0pt,pstricks]{standalone}
\usepackage{pst-eucl}
\psset{PointName=none,PointSymbol=none}
\begin{document}

\begin{pspicture}[showgrid=false](6,6)
    \pstGeonode[CurveType=polyline](1,1){A}(5,5){B}(4,1){C}
    \pstMarkAngle[MarkAngleRadius=1.6,LabelSep=1]{A}{B}{C}{\rput{!\psGetNodeCenter{B} B.y B.x atan 180 sub}(0,0){\tiny$180^\circ-\theta$}}
\end{pspicture}

\end{document}

相关内容