vba 计算航向角代码

在VBA（Visual Basic for Applications）中，你可以编写一些代码来计算两点之间的航向角。这里是一个简单的示例，假设你有两个经纬度变量（lat1, lon1 对应基准点，lat2, lon2 对应目标点）：

Function CalculateHeading(lat1 As Double, lon1 As Double, lat2 As Double, lon2 As Double) As Double
    ' Converting to radians as VBA's atan2 function expects radians
    Dim rLat1 As Double, rLon1 As Double, rLat2 As Double, rLon2 As Double
    Dim dLon As Double
    rLat1 = Radians(lat1)
    rLon1 = Radians(lon1)
    rLat2 = Radians(lat2)
    rLon2 = Radians(lon2)
    
    ' Calculating the horizontal and vertical differences
    dLon = (rLon2 - rLon1)
    If dLon > PI Then ' Adjusting for wrapping around the 180 degrees
        dLon = 2 * PI - dLon
    End If
    
    ' Using the atan2 function to calculate bearing
    CalculateHeading = Degrees(Atan2(Sin(dLon) * Cos(rLat2), Cos(rLat1) * Sin(rLat2) - Sin(rLat1) * Cos(rLat2) * Cos(dLon)))
End Function

在这个函数中，我们首先将经纬度转换为弧度，然后计算纬度差和经度差。由于地球是个圆，我们需要对经度差进行调整。最后，我们使用`Atan2`函数找到航向角。