package com.ruoyi.device.hiksdk.util.hikSdkUtil;
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import org.gavaghan.geodesy.*;
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import java.math.BigDecimal;
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import java.util.Arrays;
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public class GisUtil {
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public static GeodeticCalculator geodeticCalculator = new GeodeticCalculator();
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/**
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* 根据经纬度，计算两点间的距离
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*
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* @param longitudeFrom 第一个点的经度
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* @param latitudeFrom 第一个点的纬度
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* @param longitudeTo 第二个点的经度
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* @param latitudeTo 第二个点的纬度
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* @return 返回距离 单位米
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*/
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public static double getDistance(double longitudeFrom, double latitudeFrom, double longitudeTo, double latitudeTo) {
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GlobalCoordinates source = new GlobalCoordinates(latitudeFrom, longitudeFrom);
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GlobalCoordinates target = new GlobalCoordinates(latitudeTo, longitudeTo);
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return geodeticCalculator.calculateGeodeticCurve(Ellipsoid.WGS84, source, target).getEllipsoidalDistance();
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}
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/**
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* 计算从from到to方向的直线与正北方向夹角
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*
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* @param longitudeFrom 第一个点的经度
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* @param latitudeFrom 第一个点的纬度
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* @param longitudeTo 第二个点的经度
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* @param latitudeTo 第二个点的纬度
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* @return 返回角度
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*/
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public static double getNorthAngle(double longitudeFrom, double latitudeFrom, double longitudeTo, double latitudeTo) {
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GlobalPosition source = new GlobalPosition(latitudeFrom, longitudeFrom, 0);
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GlobalPosition target = new GlobalPosition(latitudeTo, longitudeTo, 0);
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return geodeticCalculator.calculateGeodeticMeasurement(Ellipsoid.WGS84, source, target).getAzimuth();
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}
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/**
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* @param camera 经度,纬度,高度 如:{125.097531, 46.60029, 120};
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* @param lookAt 经度,纬度,高度 如:{125.124731, 46.584808, 0};
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* @param viewAngle 相机可视角度 如:20
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* @param viewWidth 视域宽度 如:150
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* @return ptz 数组 如:[129.5355798969157, -2.5419097807416655, 23.3676043024458]
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*/
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public static double[] getCameraPTZ(double[] camera, double[] lookAt, double viewAngle, double viewWidth) {
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double p = 0, t = 0, z = 0;
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double distance = GisUtil.getDistance(camera[0], camera[1], lookAt[0], lookAt[1]);
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double northAngle = GisUtil.getNorthAngle(camera[0], camera[1], lookAt[0], lookAt[1]);
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double height = camera[2] - lookAt[2];
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p = northAngle;
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t = Angle.toDegrees(Math.atan(height / distance)) * -1+360;
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z = distance * Math.tan(viewAngle / 2) * 2 / viewWidth;
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/* p = new BigDecimal(p).setScale(1,BigDecimal.ROUND_HALF_UP).doubleValue();
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t = new BigDecimal(t).setScale(1,BigDecimal.ROUND_HALF_UP).doubleValue();
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z = new BigDecimal(z).setScale(1,BigDecimal.ROUND_HALF_UP).doubleValue();*/
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return new double[]{p, t, z};
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}
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public static void main(String[] args) {
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// 125.097531,46.60029, 125.124731,46.584808
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//相机位置
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double[] camera = {125.146964331147,46.5580925811216,102};//经度,纬度,高度
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//看向的位置
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double[] lookAt = {125.155449,46.555108,0};//经度,纬度,高度
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double viewAngle = 20;//相机可视角度
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double viewWidth = 150;//相机视域宽度
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double[] ptz = GisUtil.getCameraPTZ(camera, lookAt, viewAngle, viewWidth);
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System.out.println("ptz:" + Arrays.toString(ptz));
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}
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}
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