git.gag.com Git - fw/altos/blob - altoslib/AltosMapPath.java

   1 /*
   2  * Copyright © 2014 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.altoslib_13;
  20
  21 import java.io.*;
  22 import java.lang.Math;
  23 import java.util.*;
  24 import java.util.concurrent.*;
  25
  26 public abstract class AltosMapPath {
  27
  28         public LinkedList<AltosMapPathPoint>    points = new LinkedList<AltosMapPathPoint>();
  29         public AltosMapPathPoint                last_point = null;
  30
  31         static public int stroke_width = 6;
  32
  33         public abstract void paint(AltosMapTransform t);
  34
  35         public AltosMapRectangle add(double lat, double lon, double time, int state) {
  36                 AltosMapPathPoint               point = new AltosMapPathPoint(new AltosLatLon (lat, lon), time, state);
  37                 AltosMapRectangle       rect = null;
  38
  39                 if (!point.equals(last_point)) {
  40                         if (last_point != null)
  41                                 rect = new AltosMapRectangle(last_point.lat_lon, point.lat_lon);
  42                         points.add (point);
  43                         last_point = point;
  44                 }
  45                 return rect;
  46         }
  47
  48         private double dist(AltosLatLon lat_lon, AltosMapPathPoint point) {
  49                 return (new AltosGreatCircle(lat_lon.lat,
  50                                              lat_lon.lon,
  51                                              point.lat_lon.lat,
  52                                              point.lat_lon.lon)).distance;
  53         }
  54
  55         public AltosMapPathPoint nearest(AltosLatLon lat_lon) {
  56                 AltosMapPathPoint nearest = null;
  57                 double nearest_dist = 0;
  58                 for (AltosMapPathPoint point : points) {
  59                         if (nearest == null) {
  60                                 nearest = point;
  61                                 nearest_dist = dist(lat_lon, point);
  62                         } else {
  63                                 double d = dist(lat_lon, point);
  64                                 if (d < nearest_dist) {
  65                                         nearest = point;
  66                                         nearest_dist = d;
  67                                 }
  68                         }
  69                 }
  70                 return nearest;
  71         }
  72
  73         public void clear () {
  74                 points = new LinkedList<AltosMapPathPoint>();
  75         }
  76 }