package com.panzhihua.common.utlis;
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import java.awt.*;
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import java.awt.geom.Point2D;
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import java.util.ArrayList;
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import java.util.List;
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import com.panzhihua.common.model.dtos.community.bigscreen.event.ScreenDrawLngLatDTO;
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/**
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* 判断坐标点位置状态
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*/
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public class GisPointUtil {
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private static double EARTH_RADIUS = 6378137d;
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private static double rad(double d) {
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return d * Math.PI / 180.0;
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}
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/**
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* 通过经纬度获取距离(单位：米)
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*
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* @param lat1
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* @param lng1
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* @param lat2
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* @param lng2
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* @return
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*/
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public static double getDistance(double lat1, double lng1, double lat2, double lng2) {
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double radLat1 = rad(lat1);
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double radLat2 = rad(lat2);
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double a = radLat1 - radLat2;
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double b = rad(lng1) - rad(lng2);
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double s = 2 * Math.asin(Math
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.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
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s = s * EARTH_RADIUS;
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s = Math.round(s * 10000d) / 10000d;
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return s;
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}
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/**
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* 判断一个点是否在圆形区域内
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*
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* @param radius
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* 半径
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* @param lat1
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* 圆心纬度
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* @param lng1
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* 圆心经度
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* @param lat2
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* 坐标纬度
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* @param lng2
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* 坐标经度
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*/
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public static boolean isInCircle(double lng1, double lat1, double lng2, double lat2, String radius) {
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return getDistance(lat1, lng1, lat2, lng2) < Double.parseDouble(radius);
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}
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/**
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* 判断是否在多边形区域内
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*
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* @param pointLon
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* 要判断的点的纵坐标
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* @param pointLat
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* 要判断的点的横坐标 // * @param lon 区域各顶点的纵坐标数组 // * @param lat 区域各顶点的横坐标数组
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* @return
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*/
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public static boolean isInPolygon(double pointLon, double pointLat, List<ScreenDrawLngLatDTO> lngLatList) {
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// 将要判断的横纵坐标组成一个点
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Point2D.Double point = new Point.Double(pointLon, pointLat);
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// 将区域各顶点的横纵坐标放到一个点集合里面
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List<Point2D.Double> pointList = new ArrayList<Point2D.Double>();
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double polygonPoint_x = 0.0, polygonPoint_y = 0.0;
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int len = lngLatList.size();
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for (int i = 0; i < len; i++) {
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polygonPoint_x = lngLatList.get(i).getLng();
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polygonPoint_y = lngLatList.get(i).getLat();
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Point2D.Double polygonPoint = new Point2D.Double(polygonPoint_x, polygonPoint_y);
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pointList.add(polygonPoint);
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}
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return check(point, pointList);
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}
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/**
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* 一个点是否在多边形内
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*
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* @param point
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* 要判断的点的横纵坐标
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* @param polygon
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* 组成的顶点坐标集合
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* @return
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*/
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private static boolean check(Point2D.Double point, List<Point2D.Double> polygon) {
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java.awt.geom.GeneralPath peneralPath = new java.awt.geom.GeneralPath();
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Point2D.Double first = polygon.get(0);
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// 通过移动到指定坐标（以双精度指定），将一个点添加到路径中
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peneralPath.moveTo(first.x, first.y);
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polygon.remove(0);
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for (Point2D.Double d : polygon) {
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// 通过绘制一条从当前坐标到新指定坐标（以双精度指定）的直线，将一个点添加到路径中。
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peneralPath.lineTo(d.x, d.y);
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}
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// 将几何多边形封闭
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peneralPath.lineTo(first.x, first.y);
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peneralPath.closePath();
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// 测试指定的 Point2D 是否在 Shape 的边界内。
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return peneralPath.contains(point);
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}
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public static void main(String[] args) {
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// String points =
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// "[{\"sets\":[{\"name\":\"sswg\",\"value\":\"402881f6681232c00168129b896e0078\"}],\"where\":[{\"name\":\"id\",\"value\":3231735,\"type\":\"=\"}]},{\"sets\":[{\"name\":\"sswg\",\"value\":\"000000006817dd6f0168313b9b89049a\"}],\"where\":[{\"name\":\"id\",\"value\":3231735,\"type\":\"=\"}]}]";
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// JSONArray pointArray = (JSONArray)JSONArray.parse(points);
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// System.out.println(isInPolygon(120.636514,31.341752, pointArray));
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// String points =
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// "[{\"x\":120.61123416,\"y\":31.32889074,\"z\":137.05},{\"x\":120.61312695,\"y\":31.31892631,\"z\":128.61},{\"x\":120.61455616,\"y\":31.30808702,\"z\":43.66},{\"x\":120.62127327,\"y\":31.30899876,\"z\":62.21},{\"x\":120.63003506,\"y\":31.31057071,\"z\":29.43},{\"x\":120.63726235,\"y\":31.31203339,\"z\":92.90},{\"x\":120.64536616,\"y\":31.31334188,\"z\":78.36},{\"x\":120.64402082,\"y\":31.31947999,\"z\":13.19},{\"x\":120.64136126,\"y\":31.32757908,\"z\":87.36},{\"x\":120.63689776,\"y\":31.33287239,\"z\":60.62},{\"x\":120.63502091,\"y\":31.33742080,\"z\":114.21},{\"x\":120.63071787,\"y\":31.33793104,\"z\":32.99},{\"x\":120.62952446,\"y\":31.34483170,\"z\":164.79},{\"x\":120.62710968,\"y\":31.34801804,\"z\":164.15},{\"x\":120.62731359,\"y\":31.34823458,\"z\":189.53},{\"x\":120.62700980,\"y\":31.34894193,\"z\":194.24},{\"x\":120.62700980,\"y\":31.34894193,\"z\":194.24},{\"x\":120.62700980,\"y\":31.34894193,\"z\":194.24},{\"x\":120.62665860,\"y\":31.34861797,\"z\":155.41},{\"x\":120.61706620,\"y\":31.34846463,\"z\":200.05},{\"x\":120.61854348,\"y\":31.34267516,\"z\":138.68},{\"x\":120.62111689,\"y\":31.33313042,\"z\":154.61}]";
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// JSONArray pointArray = (JSONArray)JSONArray.parse(points);
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// System.out.println(isInPolygon(120.66615036,31.33525453, pointArray));//不在范围内
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// System.out.println(isInPolygon(120.62171413,31.32044689, pointArray));//在范围内
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}
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}
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