如何在树/图表中书写孟加拉语文本？

Question

梅威瑟：

\documentclass[tikz,border=2pt,multi]{standalone}

\usepackage{forest,array}
\usetikzlibrary{shadows}
\newcolumntype{C}[1]{>{\centering}p{#1}}

\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{bengali}
% Replace this with whatever font you're using
\newfontfamily\bengalifont[Script=Bengali]{Akaash}

\begin{document}
    
    \begin{forest}
        for tree={
            if level=0{align=center}{% allow multi-line text and set alignment
                align={@{}C{25mm}@{}},
            },
            draw,
            font=\sffamily\bfseries,
            edge path={
                \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) -- +(0,-5mm) -| (.child anchor)\forestoption{edge label};
            },
            parent anchor=south,
            child anchor=north,
            l sep=10mm,
            tier/.wrap pgfmath arg={tier #1}{level()},
            edge={ultra thick, rounded corners=2pt},
            ultra thick,
            inner color=gray!5,
            outer color=gray!20,
            rounded corners=2pt,
            drop shadow,
        }
        [\textbengali{বাংলা ট্রি}
        [B1]
        [B2
        [C1]
        [C2]
        ]
        [B3]
        [B4]
        ]
    \end{forest}
    
\end{document}

得出：

我想 ：

Answer 1

它与字体有关，正如日志中的错误消息所示。

该文档没有定义 sans 字体，因此使用默认的 sans 字体，并且没有孟加拉语，因此森林的命令font=\sffamily\bfseries具有预期的结果。

Akaash 字体是一种无衬线字体；它有拉丁文和孟加拉文字母；它没有粗体，但可以伪造粗体。这三点很有用。

因此，如果希望保留 Akaash 字体，有两种解决方案可供选择：（A）将 Akaash 设为文档的 sans 字体并继续使用font=\sffamily\bfseries：

\setsansfont{Akaash}[Script=Bengali,AutoFakeBold=4.0]

或者，（B）通过多语方法在森林中使用 Akaash，并将森林字体命令更改为font=\bengalifont\bfseries：

\newfontfamily\bengalifont[AutoFakeBold=4.0,Script=Bengali]{Akaash}

在这两种情况下，都需要假粗体选项。

---

（A）将 Akaash 设置为文档的 sans 字体并为其定义假粗体。

平均能量损失

\documentclass[tikz,border=2pt,multi]{standalone}
\usepackage{forest,array}
\usetikzlibrary{shadows}
\newcolumntype{C}[1]{>{\centering}p{#1}}

\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{bengali}
\setmainfont{Noto Serif}
\setsansfont{Akaash}[Script=Bengali,AutoFakeBold=4.0,Renderer=HarfBuzz]%HarfBuzz for lualatex.
% Replace this with whatever font you're using
\newfontfamily\bengalifont[Script=Bengali,Renderer=HarfBuzz]{Akaash}%HarfBuzz for lualatex.

\begin{document}

    \begin{forest}
        for tree={
            if level=0{align=center}{% allow multi-line text and set alignment
                align={@{}C{25mm}@{}},
            },
            draw,
            font=\sffamily\bfseries\color{blue},
            edge path={
                \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) -- +(0,-5mm) -| (.child anchor)\forestoption{edge label};
            },
            parent anchor=south,
            child anchor=north,
            l sep=10mm,
            tier/.wrap pgfmath arg={tier #1}{level()},
            edge={ultra thick, rounded corners=2pt},
            ultra thick,
            inner color=gray!5,
            outer color=gray!20,
            rounded corners=2pt,
            drop shadow,
        }
        [\textbengali{বাংলা ট্রি}
        [B1]
        [B2
        [C1]
        [C2]
        ]
        [B3]
        [B4]
        ]
    \end{forest}
    
\end{document}

（B）保留文档中未定义字体，但对树木使用粗体 Akaash 字体。

平均能量损失

\documentclass[tikz,border=2pt,multi]{standalone}
\usepackage{forest,array}
\usetikzlibrary{shadows}
\newcolumntype{C}[1]{>{\centering}p{#1}}

\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{bengali}
\setmainfont{Noto Serif}
%\setsansfont{Akaash}[Script=Bengali,AutoFakeBold=4.0,Renderer=HarfBuzz]%HarfBuzz for lualatex.
% Replace this with whatever font you're using
\newfontfamily\bengalifont[AutoFakeBold=4.0,Script=Bengali,Renderer=HarfBuzz]{Akaash}%HarfBuzz for lualatex.

\begin{document}

    \begin{forest}
        for tree={
            if level=0{align=center}{% allow multi-line text and set alignment
                align={@{}C{25mm}@{}},
            },
            draw,
            font=\bengalifont\bfseries\color{red},
            edge path={
                \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) -- +(0,-5mm) -| (.child anchor)\forestoption{edge label};
            },
            parent anchor=south,
            child anchor=north,
            l sep=10mm,
            tier/.wrap pgfmath arg={tier #1}{level()},
            edge={ultra thick, rounded corners=2pt},
            ultra thick,
            inner color=gray!5,
            outer color=gray!20,
            rounded corners=2pt,
            drop shadow,
        }
        [\textbengali{বাংলা ট্রি}
        [B1]
        [B2
        [C1]
        [C2]
        ]
        [B3]
        [B4]
        ]
    \end{forest}
    
\end{document}