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如何将带有 \pstAngleAOB 的代数表达式传递给 RotAngle？

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如何将带有 \pstAngleAOB 的代数表达式传递给 RotAngle？

我尝试分配\i*\pstAngleAOB{A'}{T}{B'}/10而不是手动计算的值\i*16.626，RotAngle如下例所示（参见注释的行）。

平均能量损失

在此处输入图片描述

\documentclass[pstricks,border=12pt,12pt]{standalone}
\usepackage{pst-geometrictools}
\usepackage{pst-eucl}
\usepackage{pst-calculate}
\usepackage{pgffor}

\def\offset{30}
\begin{document}    
\foreach \i in {0,...,10}{%
\begin{pspicture}[showgrid,linewidth=2pt](-6,-4)(6,7)
    \pstGeonode(0,3){T}(-4,0){A}(4,0){B}
    \psset{PointName=none,PointSymbol=none}
    \pstRotation[RotAngle=-\offset]{T}{A}[A']
    \pstRotation[RotAngle=\offset]{T}{B}[B']
    % --------------------------------------------------
    % I don't like the manually-calculated value 16.626
    \pstRotation[RotAngle=\pscalculate{\i*16.626}]{T}{A'}[U]
    % I want to use the following but it does not compile.
    %\pstRotation[RotAngle=\pscalculate{\i*\pstAngleAOB{A'}{T}{B'}/10}]{T}{A'}[U]
    % --------------------------------------------------
    \pstArcOAB{T}{A'}{U}
    \psCompass{}(T)(U)
\end{pspicture}}
\end{document}

\pstAngleAOB如何使用 to传递代数表达式RotAngle？

注意：为了了解其他绘图包（Asymptote、TikZ、Metapost 等）中是否有优雅的技巧或内置宏，请随意提交这些包。

答案1

RotAngle的值直接用作PS代码：

\documentclass[pstricks,border=12pt,12pt]{standalone}
\usepackage{pst-geometrictools}
\usepackage{pst-eucl}
\usepackage{pst-calculate}

\def\offset{30}
\begin{document}    
\pgfforeach \i in {0,...,10}{%
\begin{pspicture}[showgrid,linewidth=2pt](-6,-4)(6,7)
    \pstGeonode(0,3){T}(-4,0){A}(4,0){B}
    \psset{PointName=none,PointSymbol=none}
    \pstRotation[RotAngle=-\offset]{T}{A}[A']
    \pstRotation[RotAngle=\offset]{T}{B}[B']
    \pstRotation[RotAngle={\pstAngleAOB{A'}{T}{B'} 10 div \i\space mul}]{T}{A'}[U]
    \pstArcOAB{T}{A'}{U}
    \psCompass{}(T)(U)
\end{pspicture}}
\end{document}

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