空间点到直线的距离
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posted @ 2010-08-04 15:23 翰墨小生 阅读(4883) 评论(2) 推荐(0) 编辑
Note for cross product
摘要：
The result of dot product is a number The result of cross product is a vector Formula of dot product a•b = |a||b|cosθ Formula of cross product axb = |a||b|sinθ 实际上上面的叉积公式并不完整，因为叉积的结果是一个向量，而向量是既有大小又有... 阅读全文
posted @ 2010-08-04 09:26 翰墨小生 阅读(161) 评论(0) 推荐(0) 编辑
