画图并不难，有多种方式，麻烦的是高度可定制的样式，这里提供了如何使用`pgfkey`管理样式的例子供参考，简单实现了对三角形以下样式的定制： - 每条边上点的数量 - 相邻点之间的间距 - 边的宽度（会自动计算间距） - 每个重复点的样式 - 三角形下方的文本 更多的样式可以参照着设置。 ```tex \documentclass[tikz, border=1cm]{standalone} \usepackage{xeCJK} \usetikzlibrary{calc} \makeatletter \newlength\triangle@@sep \tikzset{ triangle count/.store in=\triangle@count, triangle count=2, triangle sep/.store in=\triangle@sep, triangle sep=5mm, triangle width/.store in=\triangle@width, triangle width=, triangle pattern/.store in=\triangle@pattern, triangle pattern = {\fill[red] (0, 0) circle (2pt);}, triangle text/.store in=\triangle@text, triangle text=, pics/triangle/.style={ /tikz/transform shape, code = { \pgfmathsetmacro{\triangle@count}{\triangle@count - 1} \ifx\triangle@width\pgfutil@empty \pgfmathsetlength{\triangle@@sep}{\triangle@sep} \else \pgfmathsetlength{\triangle@@sep}{\triangle@width/\triangle@count} \typeout{xyz \the\triangle@@sep} \fi \coordinate (triangle@shift) at (0, 0); \pgfmathsetmacro{\triangle@total}{3 * \triangle@count} \begin{scope}[local bounding box=triangle] \foreach \x [ evaluate=\x as \triangle@ang using {120 * floor((\x - 1) / \triangle@count)} ] in {1, ..., \triangle@total} { \coordinate (triangle@shift) at ($(triangle@shift) + (\triangle@ang:\triangle@@sep)$); \begin{scope}[shift={(triangle@shift)}] \triangle@pattern \end{scope} } \end{scope} \ifx\triangle@text\pgfutil@empty \else \path (0, 0 -| triangle.north) ++(0, -5mm) node {\triangle@text}; \fi } } } \makeatother \begin{document} \begin{tikzpicture} \pic at (0, 0) [triangle count=3, triangle text={test 1}] {triangle}; \pic at (3, 0) [triangle count=4, triangle width=3cm, triangle text={test 2}, triangle pattern={ \node[cyan] at (0, 0) {正}; } ] {triangle}; \pic at (8, 0) [triangle count=5, triangle width=3cm, triangle text={test 3}, triangle pattern={ \fill[teal] (-2pt, -2pt) rectangle (2pt, 2pt); } ] {triangle}; \foreach \x in {2, ..., 5} { \pic at ({(\x - 2)*2.5}, -3) [triangle count=\x, triangle text={$n=\x$}] {triangle}; } \foreach \x [evaluate=\x as \c using 100*(\x-2)/4] in {2, ..., 5} { \pic at ({(\x - 2)*3.5}, -6) [ triangle count=\x, triangle text={$n=\x$}, triangle width=2cm, triangle pattern={ \fill[red!\c!yellow] (-2pt, -2pt) rectangle (2pt, 2pt); } ] {triangle}; \end{tikzpicture} \end{document} ```