62 lines
1.5 KiB
Java
62 lines
1.5 KiB
Java
package org.insa.graph;
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/**
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* Class representing a point on Earth.
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*
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*/
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public class Point {
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// Earth radius, in meters;
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private static final double EARTH_RADIUS = 6378137.0 ;
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/**
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* Compute the distance between the two given points.
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*
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* @param long1
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* @param lat1
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* @param long2
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* @param lat2
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* @return
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*/
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public static double distance(Point p1, Point p2) {
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double sinLat = Math.sin(Math.toRadians(p1.getLatitude()))*Math.sin(Math.toRadians(p2.getLatitude()));
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double cosLat = Math.cos(Math.toRadians(p1.getLatitude()))*Math.cos(Math.toRadians(p2.getLatitude()));
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double cosLong = Math.cos(Math.toRadians(p2.getLongitude() - p1.getLongitude()));
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return EARTH_RADIUS * Math.acos(sinLat+cosLat*cosLong);
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}
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// Longitude and latitude of the point.
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private float longitude, latitude;
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/**
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*
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* @param longitude Longitude of the point, in degrees.
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* @param latitude Latitude of the point, in degrees.
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*/
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public Point(float longitude, float latitude) {
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this.longitude = longitude;
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this.latitude = latitude;
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}
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/**
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* @return Longitude of this point (in degrees).
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*/
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public float getLongitude() { return longitude; }
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/**
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* @return Latitude of this point (in degrees).
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*/
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public float getLatitude() { return latitude; }
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/**
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* Compute the distance from this point to the given point
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*
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* @param target Target point.
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*
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* @return Distane between this point and the target point, in meters.
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*/
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public double distanceTo(Point target) {
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return distance(this, target);
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}
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}
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