小坐标范围

Gramham法求解凸包。从最基本数据结构定义开始实现

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0.00244953 -0.00250185
0.00691949 -0.00385019
0.00205988 -0.00222189
0.00236412 -0.00212958
0.00192585 -0.00142471
0.00251358 -0.00104252
0.00470319 -0.00114131
0.00153798 -0.000148083
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0.00130253 0.00181969
0.00166905 0.00211758
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0.00252544 0.00450606
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-8.28767e-005 0.00550349
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-0.00497214 0.00414676