回复 waynebuaa
顺时针的概念不清,参考点是谁?
guocong89 发表于 2011-8-19 10:06
就是这些点的顺序, a1,a2,...,an 的顺序是正时针旋转就行,或以这个封闭曲线内部的任一点为参考做正时针旋转。
现在的问题是,如何简单有效地把这些点按正时针顺序排列起来呢? 比如下面这些点。- {{168.872, 146.285, 0}, {168.823, 146.594, 0}, {168.681, 146.873,
- 0}, {168.46, 147.094, 0}, {168.181, 147.236, 0}, {167.872, 147.285,
- 0}, {167.563, 147.236, 0}, {167.284, 147.094, 0}, {167.063, 146.873,
- 0}, {166.921, 146.594, 0}, {166.872, 146.285, 0}, {166.921,
- 145.976, 0}, {167.063, 145.697, 0}, {167.284, 145.476, 0}, {167.563,
- 145.334, 0}, {167.872, 145.285, 0}, {168.181, 145.334, 0}, {168.46,
- 145.476, 0}, {168.681, 145.697, 0}, {168.823, 145.976, 0}}
复制代码 多谢各位,意见都很好~ |