Android Open Source - Mapyst Distance Calculator

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Mapyst//w ww . ja  va 2s .co  m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mapyst.route;

import com.mapyst.campus.Building;

//calculates distances between points and buildings
public class DistanceCalculator {
  
  public static double distance(LatLngPoint p1, LatLngPoint p2) {
    return Math.sqrt(Math.pow(p1.lng - p2.lng, 2) + Math.pow(p1.lat - p2.lat, 2));
  }
  
  public static double buildingDistance(Building b1, Building b2) {
    LatLngPoint p1 = b1.location;
    LatLngPoint p2 = b2.location;
    
    return distance(p1, p2);
  }
  
  //distance from one building to another building plus distance from that building to yet another building
  public static double buildingDistance(Building b1, Building b2, Building b3) {
    LatLngPoint p1 = b1.location;
    LatLngPoint p2 = b2.location;
    LatLngPoint p3 = b3.location;
    
    double dist1 = distance(p1, p2);
    double dist2 = distance(p2, p3);
    return dist1 + dist2;
  }

  /*public static double buildingDistance(Waypoint2D node1, Waypoint2D node2) {
    double dx1, dy1;
    dx1 = node1.getPoint().lngInt() - node2.getPoint().lngInt();
    dy1 = node1.getPoint().latInt() - node2.getPoint().latInt();
    double dist1 = Math.sqrt(Math.pow(dx1, 2.0) + Math.pow(dy1, 2.0));
    return dist1;
  }*/

  /*public static double angle3Points(Waypoint2D p1, Waypoint2D p2, Waypoint2D p3) {
    double a = distance(p2.getPoint(), p3.getPoint());
    double b = distance(p1.getPoint(), p2.getPoint());
    double c = distance(p1.getPoint(), p3.getPoint());
    return Math.acos((Math.pow(a,2) + Math.pow(b,2) - Math.pow(c,2))/(2*a*b));
  }*/
}

Java Source Code List