図面の輪郭の一部を省略する

Question

回答からこの質問、次のコードを使用して十字の四分円を描画しました。

\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\usepackage{verbatim}
\usepackage{tikz}
\begin{document}
\begin{frame}[t]
\frametitle{}
\includegraphics[width=6.6cm,keepaspectratio]{./cross_coptic.jpg}
\vskip -6.5cm
\hskip .04cm
\begin{tikzpicture}[scale=.9, transform shape]
\node [red] at (0,0) (o){\bf .}%do not insert empty lines inbetween
([shift={(90.:3.4cm)}]o.center) node [red] (t){\bf .}%topmost
([shift={(180.:3.38cm)}]o.center) node [red] (ol){\bf .}
([shift={(90.:.6cm)}]o.center) node [red] (oua){\bf .}%up 1 level
([shift={(180.:.6cm)}]oua.center) node [red] (oual){\bf .}
([shift={(90.:2.1cm)}]o.center) node [red] (ouaaa){\bf .}%up 3 levels
([shift={(180.:1.6cm)}]ouaaa.center) node [red] (ouaaal){\bf .}
([shift={(90.:2.45cm)}]o.center) node [red] (ouaaaa){\bf .}%up 4 levels
([shift={(180.:.6cm)}]ouaaaa.center) node [red] (ouaaaal){\bf .}
;
\draw[line width=.1cm,red, fill=red!20!white] (oual.center)
 to [out=90,in=-20, looseness=1.] (ouaaal.center)
 to [out=50,in=180, looseness=1.] (ouaaaal.center)
 to [out=90,in=-150, looseness=1.] (t.center)
 to [out=-90,in=90, looseness=1.] (o.center)
 to [out=180,in=0, looseness=1.] ([shift={(-90:.6)}]oual.center)
 -- cycle
;
\end{tikzpicture}
\end{frame}
\end{document}

十字の内側にあるアウトライン（接続ノード t -- o -- shift={(-90:.6)}]oual -- oual）の描画を省略し、象限を塗りつぶし続けることは可能ですか？

Answer 1

\documentclass[tikz, border=1cm]{standalone}
\usetikzlibrary{spath3}
\begin{document}
\begin{tikzpicture}
\path[spath/save=apath] (-1,1) -- (-1,2) to[out=100, in=-20] (-2.6,3.4) to[out=45, in=180] (-1,4.2) to[out=90, in=210] (0,5.6);
\draw[line width=6pt] 
[spath/use={apath}]
[spath/use={apath, move, weld, transform={xscale=-1, rotate=0}, reverse}]
[spath/use={apath, move, weld, transform={scale=-1, rotate=90}}]
[spath/use={apath, move, weld, transform={xscale=-1, rotate=90}, reverse}]
[spath/use={apath, move, weld, transform={scale=-1, rotate=0}}]
[spath/use={apath, move, weld, transform={yscale=-1, rotate=0}, reverse}]
[spath/use={apath, move, weld, transform={scale=-1, rotate=-90}}]
[spath/use={apath, move, weld, transform={xscale=-1, rotate=-90}, reverse}]
-- cycle;
\fill[red!20] (0,0) -- (-1,0) [spath/use={apath, weld}] --cycle;
\draw[red, line width=6pt] [spath/use={apath}];
\end{tikzpicture}
\end{document}

Answer 2

正確に何をしたいのかはわかりませんが、以下のよう\drawに を に置き換えることで\fill、背景の塗りつぶしを維持しながら描画された線を削除することができます。

\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\usepackage{verbatim}
\usepackage{tikz}
\begin{document}
\begin{frame}[t]
\frametitle{}
%\includegraphics[width=6.6cm,keepaspectratio]{./cross_coptic.jpg}
%\vskip -6.5cm
%\hskip .04cm
\begin{tikzpicture}[scale=.9, transform shape]
\node at (0,0) (o){}%do not insert empty lines inbetween
([shift={(90.:3.4cm)}]o.center) node (t){}%topmost
([shift={(180.:3.38cm)}]o.center) node (ol){}
([shift={(90.:.6cm)}]o.center) node (oua){}%up 1 level
([shift={(180.:.6cm)}]oua.center) node  (oual){}
([shift={(90.:2.1cm)}]o.center) node (ouaaa){}%up 3 levels
([shift={(180.:1.6cm)}]ouaaa.center) node (ouaaal){}
([shift={(90.:2.45cm)}]o.center) node (ouaaaa){}%up 4 levels
([shift={(180.:.6cm)}]ouaaaa.center) node (ouaaaal){}
;
\fill[red!20!white] (oual.center)
 to [out=90,in=-20, looseness=1.] (ouaaal.center)
 to [out=50,in=180, looseness=1.] (ouaaaal.center)
 to [out=90,in=-150, looseness=1.] (t.center)
 to [out=-90,in=90, looseness=1.] (o.center)
 to [out=180,in=0, looseness=1.] ([shift={(-90:.6)}]oual.center)
 -- cycle
;

\end{tikzpicture}
\end{frame}
\end{document}

がないので、含まれている図をコメント アウトしていることに注意してくださいcross_coptic.jpg。8 行目から 10 行目のコメントを解除できます。