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.
23 import java.lang.Math;
24 import java.awt.geom.Point2D;
25 import java.util.concurrent.*;
26 import org.altusmetrum.altoslib_1.*;
27 import org.altusmetrum.altosuilib_1.*;
29 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
30 // preferred vertical step in a tile in naut. miles
31 // will actually choose a step size between x and 2x, where this
33 static final double tile_size_nmi = 0.75;
35 static final int px_size = 512;
37 static final int MAX_TILE_DELTA = 100;
39 private static Point2D.Double translatePoint(Point2D.Double p,
42 return new Point2D.Double(p.x + d.x, p.y + d.y);
46 public double lat, lng;
47 public LatLng(double lat, double lng) {
54 // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
55 // search for fromLatLngToPoint and fromPointToLatLng
57 private static Point2D.Double pt(LatLng latlng, int zoom) {
58 double scale_x = 256/360.0 * Math.pow(2, zoom);
59 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
60 return pt(latlng, scale_x, scale_y);
64 private static Point2D.Double pt(LatLng latlng,
65 double scale_x, double scale_y)
67 Point2D.Double res = new Point2D.Double();
70 res.x = latlng.lng * scale_x;
72 e = Math.sin(Math.toRadians(latlng.lat));
73 e = Math.max(e,-(1-1.0E-15));
74 e = Math.min(e, 1-1.0E-15 );
76 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
80 static private LatLng latlng(Point2D.Double pt,
81 double scale_x, double scale_y)
87 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
88 lat = Math.toDegrees(rads - Math.PI/2);
90 return new LatLng(lat,lng);
94 double scale_x, scale_y;
96 int radius; /* half width/height of tiles to load */
98 private Point2D.Double pt(double lat, double lng) {
99 return pt(new LatLng(lat, lng), scale_x, scale_y);
102 private LatLng latlng(double x, double y) {
103 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
106 private LatLng latlng(Point2D.Double pt) {
107 return latlng(pt, scale_x, scale_y);
111 ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
112 Point2D.Double centre;
114 private Point2D.Double tileCoordOffset(Point p) {
115 return new Point2D.Double(centre.x - p.x*px_size,
116 centre.y - p.y * px_size);
119 private Point tileOffset(Point2D.Double p) {
120 return new Point((int)Math.floor((centre.x+p.x)/px_size),
121 (int)Math.floor((centre.y+p.y)/px_size));
124 private Point2D.Double getBaseLocation(double lat, double lng) {
125 Point2D.Double locn, north_step;
128 // stupid loop structure to please Java's control flow analysis
131 scale_x = 256/360.0 * Math.pow(2, zoom);
132 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
134 north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
135 if (locn.y - north_step.y > px_size)
138 locn.x = -px_size * Math.floor(locn.x/px_size);
139 locn.y = -px_size * Math.floor(locn.y/px_size);
143 public void reset() {
147 public void set_font() {
151 private void loadMap(final AltosSiteMapTile tile,
152 File pngfile, String pngurl)
154 final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
156 SwingUtilities.invokeLater(new Runnable() {
162 System.out.printf("# Failed to fetch file %s\n", pngfile);
163 System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
170 public int prefetchMap(int x, int y) {
171 LatLng map_latlng = latlng(
172 -centre.x + x*px_size + px_size/2,
173 -centre.y + y*px_size + px_size/2);
174 pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
175 pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
176 if (pngfile.exists()) {
178 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
185 public static void prefetchMaps(double lat, double lng, int w, int h) {
186 AltosSiteMap asm = new AltosSiteMap(true);
187 asm.centre = asm.getBaseLocation(lat, lng);
189 //Point2D.Double p = new Point2D.Double();
191 int dx = -w/2, dy = -h/2;
192 for (int y = dy; y < h+dy; y++) {
193 for (int x = dx; x < w+dx; x++) {
194 int r = asm.prefetchMap(x, y);
197 System.out.printf("Already have %s\n", asm.pngfile);
200 System.out.printf("Fetched map %s\n", asm.pngfile);
203 System.out.printf("# Failed to fetch file %s\n", asm.pngfile);
204 System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl);
211 public String initMap(Point offset) {
212 AltosSiteMapTile tile = mapTiles.get(offset);
213 Point2D.Double coord = tileCoordOffset(offset);
215 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
217 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
218 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
219 loadMap(tile, pngfile, pngurl);
220 return pngfile.toString();
223 public void initAndFinishMapAsync (final AltosSiteMapTile tile, final Point offset) {
224 Thread thread = new Thread() {
227 finishTileLater(tile, offset);
233 public void setBaseLocation(double lat, double lng) {
234 for (Point k : mapTiles.keySet()) {
235 AltosSiteMapTile tile = mapTiles.get(k);
239 centre = getBaseLocation(lat, lng);
240 scrollRocketToVisible(pt(lat,lng));
243 private void initMaps(double lat, double lng) {
244 setBaseLocation(lat, lng);
246 Thread thread = new Thread() {
248 for (Point k : mapTiles.keySet())
255 private static File MapFile(double lat, double lng, int zoom) {
256 char chlat = lat < 0 ? 'S' : 'N';
257 char chlng = lng < 0 ? 'W' : 'E';
258 if (lat < 0) lat = -lat;
259 if (lng < 0) lng = -lng;
260 return new File(AltosUIPreferences.mapdir(),
261 String.format("map-%c%.6f,%c%.6f-%d.png",
262 chlat, lat, chlng, lng, zoom));
265 private static String MapURL(double lat, double lng, int zoom) {
266 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);
269 boolean initialised = false;
270 Point2D.Double last_pt = null;
273 public void show(double lat, double lon) {
275 scrollRocketToVisible(pt(lat, lon));
277 public void show(final AltosState state, final AltosListenerState listener_state) {
278 // if insufficient gps data, nothing to update
279 if (!state.gps.locked && state.gps.nsat < 4)
283 if (state.pad_lat != 0 || state.pad_lon != 0) {
284 initMaps(state.pad_lat, state.pad_lon);
286 } else if (state.gps.lat != 0 || state.gps.lon != 0) {
287 initMaps(state.gps.lat, state.gps.lon);
294 final Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
295 if (last_pt == pt && last_state == state.state)
298 if (last_pt == null) {
301 boolean in_any = false;
302 for (Point offset : mapTiles.keySet()) {
303 AltosSiteMapTile tile = mapTiles.get(offset);
304 Point2D.Double ref, lref;
305 ref = translatePoint(pt, tileCoordOffset(offset));
306 lref = translatePoint(last_pt, tileCoordOffset(offset));
307 tile.show(state, listener_state, lref, ref);
308 if (0 <= ref.x && ref.x < px_size)
309 if (0 <= ref.y && ref.y < px_size)
313 Point offset = tileOffset(pt);
315 Point2D.Double ref, lref;
316 ref = translatePoint(pt, tileCoordOffset(offset));
317 lref = translatePoint(last_pt, tileCoordOffset(offset));
319 AltosSiteMapTile tile = createTile(offset);
320 tile.show(state, listener_state, lref, ref);
321 initAndFinishMapAsync(tile, offset);
324 scrollRocketToVisible(pt);
326 if (offset != tileOffset(last_pt)) {
327 ensureTilesAround(offset);
331 last_state = state.state;
334 public void centre(Point2D.Double pt) {
335 Rectangle r = comp.getVisibleRect();
336 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
337 int dx = (int)copt.x - r.width/2 - r.x;
338 int dy = (int)copt.y - r.height/2 - r.y;
341 comp.scrollRectToVisible(r);
344 public void centre(AltosState state) {
345 if (!state.gps.locked && state.gps.nsat < 4)
347 centre(pt(state.gps.lat, state.gps.lon));
350 public void draw_circle(double lat, double lon) {
351 final Point2D.Double pt = pt(lat, lon);
353 for (Point offset : mapTiles.keySet()) {
354 AltosSiteMapTile tile = mapTiles.get(offset);
355 Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
356 tile.draw_circle(ref);
360 private AltosSiteMapTile createTile(Point offset) {
361 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
362 mapTiles.put(offset, tile);
365 private void finishTileLater(final AltosSiteMapTile tile,
368 SwingUtilities.invokeLater( new Runnable() {
370 addTileAt(tile, offset);
375 private void ensureTilesAround(Point base_offset) {
376 for (int x = -radius; x <= radius; x++) {
377 for (int y = -radius; y <= radius; y++) {
378 Point offset = new Point(base_offset.x + x, base_offset.y + y);
379 if (mapTiles.containsKey(offset))
381 AltosSiteMapTile tile = createTile(offset);
382 initAndFinishMapAsync(tile, offset);
387 private Point topleft = new Point(0,0);
388 private void scrollRocketToVisible(Point2D.Double pt) {
389 Rectangle r = comp.getVisibleRect();
390 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
391 int dx = (int)copt.x - r.width/2 - r.x;
392 int dy = (int)copt.y - r.height/2 - r.y;
393 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
396 comp.scrollRectToVisible(r);
400 private void addTileAt(AltosSiteMapTile tile, Point offset) {
401 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
402 Math.abs(offset.y) >= MAX_TILE_DELTA)
404 System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
409 boolean review = false;
410 Rectangle r = comp.getVisibleRect();
411 if (offset.x < topleft.x) {
412 r.x += (topleft.x - offset.x) * px_size;
413 topleft.x = offset.x;
416 if (offset.y < topleft.y) {
417 r.y += (topleft.y - offset.y) * px_size;
418 topleft.y = offset.y;
421 GridBagConstraints c = new GridBagConstraints();
422 c.anchor = GridBagConstraints.CENTER;
423 c.fill = GridBagConstraints.BOTH;
424 // put some space between the map tiles, debugging only
425 // c.insets = new Insets(5, 5, 5, 5);
427 c.gridx = offset.x + MAX_TILE_DELTA;
428 c.gridy = offset.y + MAX_TILE_DELTA;
429 layout.setConstraints(tile, c);
433 comp.scrollRectToVisible(r);
437 private AltosSiteMap(boolean knowWhatYouAreDoing) {
438 if (!knowWhatYouAreDoing) {
439 throw new RuntimeException("Arggh.");
443 JComponent comp = new JComponent() { };
444 private GridBagLayout layout = new GridBagLayout();
446 public AltosSiteMap(int in_radius) {
449 GrabNDrag scroller = new GrabNDrag(comp);
451 comp.setLayout(layout);
453 for (int x = -radius; x <= radius; x++) {
454 for (int y = -radius; y <= radius; y++) {
455 Point offset = new Point(x, y);
456 AltosSiteMapTile t = createTile(offset);
457 addTileAt(t, offset);
460 setViewportView(comp);
461 setPreferredSize(new Dimension(500,500));
464 public AltosSiteMap() {