tikz：沿路径从右到左的文本

Question

我有这个使用库沿路径编写文本的示例decorations.text，并且我想从右到左插入阿拉伯语文本

\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{decorations.text}
\usepackage{fontspec}
\usepackage[rldocument]{bidi}

\setmainfont[Script=Arabic]{Amiri}

\tikzset{decoration={text along path,
text={Very very long text I need to show it from right to left}}} 

\begin{document}

\begin{tikzpicture}
    \path [decorate] (0,0)..controls +(45:4cm) and +(225:4cm)..(8,0); 
\end{tikzpicture}

\end{document}

我希望以同样的方式从右到左显示文本

left to right from it show to need I text long very Very

Answer 1

正如已经提到的，reverse textTikZ 手册中描述的效果就是您想要的。

然而，你也想第一的使用效果对字母进行分组group letters，否则它会反转每一个字母。

请注意，两个键的顺序很重要，在下面提供的示例中，我写了两个顺序来展示差异。

编辑：忘记让文本倾斜以跟随路径。使用时characters={text along path}请确保文本与路径倾斜。

\documentclass[border=5mm]{article}
\usepackage{tikz}
\usetikzlibrary{decorations.text}

\tikzset{
    decoration={
        text effects along path, 
        text={Very very long text I need to show it from right to left}
    }
} 

\begin{document}

\subsection*{Group letters, reverse text}
\begin{tikzpicture}
    \path [
        decorate, 
        decoration= {
            text effects/.cd, 
                    group letters,
                    reverse text, 
                    characters={text along path}
        }] (0,0)..controls +(45:4cm) and +(225:4cm)..(8,0); 
\end{tikzpicture}

\subsection*{Reverse text, group letters}
\begin{tikzpicture}
    \path [
        decorate, 
        decoration= {
            text effects/.cd, 
                    reverse text, 
                    group letters,
                    characters={text along path}
        }] (0,0)..controls +(45:4cm) and +(225:4cm)..(8,0); 
\end{tikzpicture}

\end{document}