判断一个点是否在多边形内 射线法判断一个点是否在多边形内,从一直点引一条射线与多边形相交,算其交点个数,交点个数为偶数,则点不在多边形内;奇数则在多边形内。 特殊情况点在多边形顶点和边都属于在多边形内。
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判断一个点是否在多边形内
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