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相交定义成线段与多边形内部至少有一个交点，如果和边发生不规范相交（按定义那不是相交），那样判断会有问题In Reply To:和每条边判一下，再判一下，是不是在内部。。。 Posted by:jyx at 2006-08-16 20:02:08 Followed by:
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