两点间直线距离，希望在js里面计算
1.数据类型double；w3cschool看了但是，没有double数据类型；number说的太多，不知道精确到米，能不能用；
2.粉色计算公式
应该怎么写？
x1、y1 是纬度、经度
Dim x1 As Double = 37.856862
Dim y1 As Double = 112.525760
Dim x2 As Double = 37.857587
Dim y2 As Double = 112.525683
Dim rad As Double = 6371
Dim p1X As Double = X1 / 180 * Math.PI
Dim p1Y As Double = Y2 / 180 * Math.PI ’3.这行是y1么？
Dim p2X As Double = X2 / 180 * Math.PI
Dim p2Y As Double = Y2 / 180 * Math.PI
Dim a As Double = p1X - p2X
Dim b As Double = p1Y - p2Y
Dim s As Double = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a/2),2) + Math.Cos(p1X)*Math.Cos(p2X)*Math.Pow(Math.Sin(b/2),2))) * rad
output.show(s)
[此贴子已经被作者于2018/12/5 9:34:55编辑过]
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Post By：2018/12/5 9:11:00 [只看该作者]
