package com.qr.util;
import java.text.decimalformat;
/**
* //todo uv风速风向数据转换
*/
public class uvandsd {
/**
* uv数据计算速度
*/
public static double vectortospeed(double ums, double vms) {
double windabs = math.sqrt(math.pow(ums, 2) math.pow(vms, 2));
return windabs;
}
/**
* uv数据计算风向
*/
public static double vectortodegrees(double ums, double vms) {
decimalformat df = new decimalformat("#.000");
double windabs = math.sqrt(math.pow(ums, 2) math.pow(vms, 2));
double winddirtrigto = math.atan2(ums / windabs, vms / windabs);
double winddirtrigtodegrees = winddirtrigto * 180 / math.pi;
double winddirtrigfromdegrees = winddirtrigtodegrees 180;
return double.parsedouble(df.format(winddirtrigfromdegrees));
}
}