答案1
使用 tikz\shade
命令:
\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\shadedraw[left color=green,right color=red] (0.6315,3.6977) .. controls (0.7398,3.5492) and (0.7503,3.3778) .. (0.6550,3.3151) .. controls (0.5597,3.2523) and (0.3948,3.3219) .. (0.2865,3.4705) .. controls (0.1783,3.6190) and (0.1678,3.7903) .. (0.2631,3.8531) .. controls (0.3583,3.9158) and (0.5233,3.8463) .. (0.6315,3.6977) -- cycle
(0.2221,3.8172) .. controls (0.2221,3.8172) and (0.6084,4.1358) .. (0.8203,4.2755) .. controls (0.8203,4.2755) and (1.1664,5.1021) .. (1.2321,5.1457) .. controls (1.3934,5.2527) and (5.8407,7.6417) .. (6.7093,8.1135) .. controls (6.7482,8.1346) and (6.8111,8.1615) .. (6.8414,8.1290) .. controls (6.8791,8.0885) and (6.8541,7.9998) .. (6.8103,7.9659) .. controls (5.0401,6.5957) and (0.6494,3.3122) .. (0.6494,3.3122);
\end{tikzpicture}
\end{document}