考虑以下 MWE：
\documentclass{standalone}
\usepackage{tikz}
\makeatletter
\pgfdeclareshape{circtest}{ %
\inheritsavedanchors[from={rectangle}] %
\inheritbackgroundpath[from={rectangle}] %
\inheritanchorborder[from={rectangle}] %
\foreach \x in {center,north,north east,north west,south,south east,south west,east,west}{ %
\inheritanchor[from={rectangle}]{\x} %
} %
\foregroundpath{ %
\pgfpathmoveto{\pgfpointanchor{\tikz@fig@name}{center}} %
\begin{pgfscope}[ %
rotate=90, % nope
% rotate around={90:(0,0)}, % nope
] %
\foreach \angle [count=\xi] in {0,3,...,360} %
{%
\draw[ %
rotate=90, % nope
color=blue!\xi] (\angle:2cm) -- (\angle:3cm);
}
\end{pgfscope} %
} % end \foregroundpath
} %
\begin{document}
\begin{tikzpicture}
\node[circtest] (ctest) at (5,0) {};
\begin{scope}[ %
rotate=90, % ok
% rotate around={90:(0,0)}, % ok
] %
\foreach \angle [count=\xi] in {0,3,...,360} %
{%
\draw[ %
% rotate=90, % ok
color=black!\xi] (\angle:1cm) -- (\angle:2cm);
}
\end{scope}
\end{tikzpicture}
\end{document}
{tikzpicture}黑色圆环是/中的圆环{scope}，其坐标系按预期旋转。然而，在 中使用几乎相同的语法 \pgfdeclareshape最终会不是旋转坐标系——可以在蓝色环上看到，这是一个自定义circtest类型的节点。
基本上，我想在这里指定（最终）具有角度维度的参数，但我希望我的 0 度规范指的是“12 点钟”，并且我希望坐标系为逆时针。我知道在这种情况下，我只能说在 -\angle+90内\pgfdeclareshape，但出于易读性原因，我宁愿使用rotate=90在范围内之类的东西。有没有办法将这种语法与自定义\pgfdeclareshaped 节点一起使用？
答案1
好的，我想我明白了——不是使用{pgfscope}，而是使用\pgftransformrotate——和\pgftransformyscale{-1}镜像；所以代码变成：
\documentclass{standalone}
\usepackage{tikz}
\makeatletter
\pgfdeclareshape{circtest}{ %
\inheritsavedanchors[from={rectangle}] %
\inheritbackgroundpath[from={rectangle}] %
\inheritanchorborder[from={rectangle}] %
\foreach \x in {center,north,north east,north west,south,south east,south west,east,west}{ %
\inheritanchor[from={rectangle}]{\x} %
} %
\foregroundpath{ %
\pgfpathmoveto{\pgfpointanchor{\tikz@fig@name}{center}} %
\pgftransformrotate{90} %
\pgftransformyscale{-1} %
\foreach \angle [count=\xi] in {0,3,...,360} %
{%
\draw[ %
% rotate=90, % nope
color=blue!\xi] (\angle:2cm) -- (\angle:3cm);
}
} % end \foregroundpath
} %
\begin{document}
\begin{tikzpicture}
\node[circtest] (ctest) at (5,0) {};
\begin{scope}[ %
rotate=90, % ok
% rotate around={90:(0,0)}, % ok
] %
\foreach \angle [count=\xi] in {0,3,...,360} %
{%
\draw[ %
% rotate=90, % ok
color=black!\xi] (\angle:1cm) -- (\angle:2cm);
}
\end{scope}
\end{tikzpicture}
\end{document}
...输出变成：
