[2.13.0-arch-opt] locationUtil move

core/mogo-core-utils/src/main/java/com/mogo/eagle/core/utilcode/util/LocationUtils.java

@@ -0,0 +1,74 @@
+package com.mogo.eagle.core.utilcode.util;
+
+public class LocationUtils {
+    /**
+     * 地球半径
+     */
+    private static double EARTH_RADIUS = 6378.137;
+
+    private static double rad( double d ) {
+        return d * Math.PI / 180.0;
+    }
+
+    /**
+     * 计算两点间距离( 单位：米 )
+     * @param lat1
+     * @param lng1
+     * @param lat2
+     * @param lng2
+     * @return
+     */
+    public static double getDistance( double lat1, double lng1, double lat2, double lng2 ) {
+        double radLat1 = rad( lat1 );
+        double radLat2 = rad(lat2);
+        double a = radLat1 - radLat2;
+        double b = rad(lng1) - rad(lng2);
+        double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
+                + Math.cos(radLat1) * Math.cos(radLat2)
+                * Math.pow(Math.sin(b / 2), 2)));
+        s = s * EARTH_RADIUS;
+        s = Math.round(s * 10000d) / 10000d;
+        s = s * 1000;
+        return s;
+    }
+
+
+    /**
+     * 点到直线的最短距离的判断 点（x0,y0） 到由两点组成的线段（x1,y1） ,( x2,y2 )    <br>
+     *     ( 单位：米 )
+     * @param x1
+     * @param y1
+     * @param x2
+     * @param y2
+     * @param x0
+     * @param y0
+     * @return
+     */
+    public static double pointToLine( double x1, double y1, double x2, double y2, double x0, double y0 ) {
+        double space;
+        double a, b, c;
+        a = getDistance(y1, x1, y2, x2);// 线段的长度
+        b = getDistance(y1, x1, y0, x0);// (x1,y1)到点的距离
+        c = getDistance(y2, x2, y0, x0);// (x2,y2)到点的距离
+        if (c <= 0.000001 || b <= 0.000001) {
+            space = 0;
+            return space;
+        }
+        if (a <= 0.000001) {
+            space = b;
+            return space;
+        }
+        if (c * c >= a * a + b * b) {
+            space = b;
+            return space;
+        }
+        if (b * b >= a * a + c * c) {
+            space = c;
+            return space;
+        }
+        double p = (a + b + c) / 2;// 半周长
+        double s = Math.sqrt(p * (p - a) * (p - b) * (p - c));// 海伦公式求面积
+        space = 2 * s / a;// 返回点到线的距离（利用三角形面积公式求高）
+        return space;
+    }
+}