2 * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 import java.awt.image.*;
22 import java.awt.event.*;
24 import javax.swing.event.MouseInputAdapter;
25 import javax.imageio.ImageIO;
26 import javax.swing.table.*;
30 import java.util.prefs.*;
31 import java.lang.Math;
32 import java.awt.geom.Point2D;
33 import java.awt.geom.Line2D;
34 import java.util.concurrent.*;
35 import org.altusmetrum.AltosLib.*;
37 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
38 // preferred vertical step in a tile in naut. miles
39 // will actually choose a step size between x and 2x, where this
41 static final double tile_size_nmi = 0.75;
43 static final int px_size = 512;
45 static final int MAX_TILE_DELTA = 100;
47 private static Point2D.Double translatePoint(Point2D.Double p,
50 return new Point2D.Double(p.x + d.x, p.y + d.y);
54 public double lat, lng;
55 public LatLng(double lat, double lng) {
62 // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
63 // search for fromLatLngToPoint and fromPointToLatLng
64 private static Point2D.Double pt(LatLng latlng, int zoom) {
65 double scale_x = 256/360.0 * Math.pow(2, zoom);
66 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
67 return pt(latlng, scale_x, scale_y);
70 private static Point2D.Double pt(LatLng latlng,
71 double scale_x, double scale_y)
73 Point2D.Double res = new Point2D.Double();
76 res.x = latlng.lng * scale_x;
78 e = Math.sin(Math.toRadians(latlng.lat));
79 e = Math.max(e,-(1-1.0E-15));
80 e = Math.min(e, 1-1.0E-15 );
82 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
86 static private LatLng latlng(Point2D.Double pt,
87 double scale_x, double scale_y)
93 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
94 lat = Math.toDegrees(rads - Math.PI/2);
96 return new LatLng(lat,lng);
100 double scale_x, scale_y;
102 int radius; /* half width/height of tiles to load */
104 private Point2D.Double pt(double lat, double lng) {
105 return pt(new LatLng(lat, lng), scale_x, scale_y);
108 private LatLng latlng(double x, double y) {
109 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
111 private LatLng latlng(Point2D.Double pt) {
112 return latlng(pt, scale_x, scale_y);
115 ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
116 Point2D.Double centre;
118 private Point2D.Double tileCoordOffset(Point p) {
119 return new Point2D.Double(centre.x - p.x*px_size,
120 centre.y - p.y * px_size);
123 private Point tileOffset(Point2D.Double p) {
124 return new Point((int)Math.floor((centre.x+p.x)/px_size),
125 (int)Math.floor((centre.y+p.y)/px_size));
128 private Point2D.Double getBaseLocation(double lat, double lng) {
129 Point2D.Double locn, north_step;
132 // stupid loop structure to please Java's control flow analysis
135 scale_x = 256/360.0 * Math.pow(2, zoom);
136 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
138 north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
139 if (locn.y - north_step.y > px_size)
142 locn.x = -px_size * Math.floor(locn.x/px_size);
143 locn.y = -px_size * Math.floor(locn.y/px_size);
147 public void reset() {
151 public void set_font() {
155 private void loadMap(final AltosSiteMapTile tile,
156 File pngfile, String pngurl)
158 final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
160 SwingUtilities.invokeLater(new Runnable() {
166 System.out.printf("# Failed to fetch file %s\n", pngfile);
167 System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
174 public int prefetchMap(int x, int y) {
175 LatLng map_latlng = latlng(
176 -centre.x + x*px_size + px_size/2,
177 -centre.y + y*px_size + px_size/2);
178 pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
179 pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
180 if (pngfile.exists()) {
182 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
189 public static void prefetchMaps(double lat, double lng, int w, int h) {
190 AltosSiteMap asm = new AltosSiteMap(true);
191 asm.centre = asm.getBaseLocation(lat, lng);
193 Point2D.Double p = new Point2D.Double();
195 int dx = -w/2, dy = -h/2;
196 for (int y = dy; y < h+dy; y++) {
197 for (int x = dx; x < w+dx; x++) {
198 int r = asm.prefetchMap(x, y);
201 System.out.printf("Already have %s\n", asm.pngfile);
204 System.out.printf("Fetched map %s\n", asm.pngfile);
207 System.out.printf("# Failed to fetch file %s\n", asm.pngfile);
208 System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl);
215 public String initMap(Point offset) {
216 AltosSiteMapTile tile = mapTiles.get(offset);
217 Point2D.Double coord = tileCoordOffset(offset);
219 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
221 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
222 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
223 loadMap(tile, pngfile, pngurl);
224 return pngfile.toString();
227 public void setBaseLocation(double lat, double lng) {
228 for (Point k : mapTiles.keySet()) {
229 AltosSiteMapTile tile = mapTiles.get(k);
233 centre = getBaseLocation(lat, lng);
234 scrollRocketToVisible(pt(lat,lng));
237 private void initMaps(double lat, double lng) {
238 setBaseLocation(lat, lng);
240 Thread thread = new Thread() {
242 for (Point k : mapTiles.keySet())
249 private static File MapFile(double lat, double lng, int zoom) {
250 char chlat = lat < 0 ? 'S' : 'N';
251 char chlng = lng < 0 ? 'W' : 'E';
252 if (lat < 0) lat = -lat;
253 if (lng < 0) lng = -lng;
254 return new File(AltosUIPreferences.mapdir(),
255 String.format("map-%c%.6f,%c%.6f-%d.png",
256 chlat, lat, chlng, lng, zoom));
259 private static String MapURL(double lat, double lng, int zoom) {
260 return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=hybrid&format=png32", lat, lng, zoom, px_size, px_size);
263 boolean initialised = false;
264 Point2D.Double last_pt = null;
267 public void show(double lat, double lon) {
269 scrollRocketToVisible(pt(lat, lon));
271 public void show(final AltosState state, final int crc_errors) {
272 // if insufficient gps data, nothing to update
273 if (!state.gps.locked && state.gps.nsat < 4)
277 if (state.pad_lat != 0 || state.pad_lon != 0) {
278 initMaps(state.pad_lat, state.pad_lon);
280 } else if (state.gps.lat != 0 || state.gps.lon != 0) {
281 initMaps(state.gps.lat, state.gps.lon);
288 final Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
289 if (last_pt == pt && last_state == state.state)
292 if (last_pt == null) {
295 boolean in_any = false;
296 for (Point offset : mapTiles.keySet()) {
297 AltosSiteMapTile tile = mapTiles.get(offset);
298 Point2D.Double ref, lref;
299 ref = translatePoint(pt, tileCoordOffset(offset));
300 lref = translatePoint(last_pt, tileCoordOffset(offset));
301 tile.show(state, crc_errors, lref, ref);
302 if (0 <= ref.x && ref.x < px_size)
303 if (0 <= ref.y && ref.y < px_size)
307 Point offset = tileOffset(pt);
309 Point2D.Double ref, lref;
310 ref = translatePoint(pt, tileCoordOffset(offset));
311 lref = translatePoint(last_pt, tileCoordOffset(offset));
313 AltosSiteMapTile tile = createTile(offset);
314 tile.show(state, crc_errors, lref, ref);
316 finishTileLater(tile, offset);
319 scrollRocketToVisible(pt);
321 if (offset != tileOffset(last_pt)) {
322 ensureTilesAround(offset);
326 last_state = state.state;
329 public void draw_circle(double lat, double lon) {
330 final Point2D.Double pt = pt(lat, lon);
332 for (Point offset : mapTiles.keySet()) {
333 AltosSiteMapTile tile = mapTiles.get(offset);
334 Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
335 tile.draw_circle(ref);
339 private AltosSiteMapTile createTile(Point offset) {
340 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
341 mapTiles.put(offset, tile);
344 private void finishTileLater(final AltosSiteMapTile tile,
347 SwingUtilities.invokeLater( new Runnable() {
349 addTileAt(tile, offset);
354 private void ensureTilesAround(Point base_offset) {
355 for (int x = -radius; x <= radius; x++) {
356 for (int y = -radius; y <= radius; y++) {
357 Point offset = new Point(base_offset.x + x, base_offset.y + y);
358 if (mapTiles.containsKey(offset))
360 AltosSiteMapTile tile = createTile(offset);
362 finishTileLater(tile, offset);
367 private Point topleft = new Point(0,0);
368 private void scrollRocketToVisible(Point2D.Double pt) {
369 Rectangle r = comp.getVisibleRect();
370 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
371 int dx = (int)copt.x - r.width/2 - r.x;
372 int dy = (int)copt.y - r.height/2 - r.y;
373 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
376 comp.scrollRectToVisible(r);
380 private void addTileAt(AltosSiteMapTile tile, Point offset) {
381 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
382 Math.abs(offset.y) >= MAX_TILE_DELTA)
384 System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
389 boolean review = false;
390 Rectangle r = comp.getVisibleRect();
391 if (offset.x < topleft.x) {
392 r.x += (topleft.x - offset.x) * px_size;
393 topleft.x = offset.x;
396 if (offset.y < topleft.y) {
397 r.y += (topleft.y - offset.y) * px_size;
398 topleft.y = offset.y;
401 GridBagConstraints c = new GridBagConstraints();
402 c.anchor = GridBagConstraints.CENTER;
403 c.fill = GridBagConstraints.BOTH;
404 // put some space between the map tiles, debugging only
405 // c.insets = new Insets(5, 5, 5, 5);
407 c.gridx = offset.x + MAX_TILE_DELTA;
408 c.gridy = offset.y + MAX_TILE_DELTA;
409 layout.setConstraints(tile, c);
413 comp.scrollRectToVisible(r);
417 private AltosSiteMap(boolean knowWhatYouAreDoing) {
418 if (!knowWhatYouAreDoing) {
419 throw new RuntimeException("Arggh.");
423 JComponent comp = new JComponent() { };
424 private GridBagLayout layout = new GridBagLayout();
426 public AltosSiteMap(int in_radius) {
429 GrabNDrag scroller = new GrabNDrag(comp);
431 comp.setLayout(layout);
433 for (int x = -radius; x <= radius; x++) {
434 for (int y = -radius; y <= radius; y++) {
435 Point offset = new Point(x, y);
436 AltosSiteMapTile t = createTile(offset);
437 addTileAt(t, offset);
440 setViewportView(comp);
441 setPreferredSize(new Dimension(500,500));
444 public AltosSiteMap() {