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三阶行列式求三角形有向面积,求有向面积的乘积来判断旋转方向

Posted by gtxx at 2011-08-26 10:25:56 on Problem 2653
In Reply To:线段相交判断有什么好方法吗? Posted by:fxlbest at 2005-10-25 16:52:13


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