下面的代码是用Maple生成的，我发现用这个命令生成的边中\qbezier，只有垂直线和水平线是平滑的，其他的都不平滑。
\documentclass{amsart}
\usepackage{xcolor}
\begin{document}
\begin{picture}(300,300)
\thicklines
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\put(236.81,207.84){\color[rgb]{0.0,0.0,0.0} \circle{5}}
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\put(267.71,175.68){\color[rgb]{0.902,0.902,0.902} \circle*{5}}
\put(267.71,175.68){\color[rgb]{0.0,0.0,0.0} \circle{5}}
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\put(260.70,130.54){\color[rgb]{0.902,0.902,0.902} \circle*{5}}
\put(260.70,130.54){\color[rgb]{0.0,0.0,0.0} \circle{5}}
\put(269.466,128.511){\color[rgb]{0.0,0.0,0.0}\makebox(0,0){60}}
\end{picture}
\end{document}
例如，以下代码创建的水平边缘是好的。
\color[rgb]{0.000,0.000,0.000}\qbezier(130.66,240.67)(150.02,240.69)(169.38,240.70)
但下面这种做法就不好了：
\color[rgb]{0.000,0.000,0.000}\qbezier(60.78,187.36)(62.00,197.59)(63.22,207.82)
我知道转换为 TikZ 代码可能会更好，但是 qbezier 真的没有解决方案吗（因为调整太多也会导致大量工作）？
答案1
同时加载pict2e：
\documentclass{amsart}
\usepackage{pict2e}
\usepackage{xcolor}
\begin{document}
\begin{picture}(300,300)
\thicklines
\linethickness{1pt}
\color[rgb]{0.000,0.000,0.000}\qbezier(60.78,187.36)(62.00,197.59)(63.22,207.82)
[...]
\put(269.466,128.511){\color[rgb]{0.0,0.0,0.0}\makebox(0,0){60}}
\end{picture}
\end{document}
这些点表示代码中缺失的部分没有改变。
