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.*;
28 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
29 // preferred vertical step in a tile in naut. miles
30 // will actually choose a step size between x and 2x, where this
32 static final double tile_size_nmi = 0.75;
34 static final int px_size = 512;
36 static final int MAX_TILE_DELTA = 100;
38 private static Point2D.Double translatePoint(Point2D.Double p,
41 return new Point2D.Double(p.x + d.x, p.y + d.y);
45 public double lat, lng;
46 public LatLng(double lat, double lng) {
53 // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
54 // search for fromLatLngToPoint and fromPointToLatLng
56 private static Point2D.Double pt(LatLng latlng, int zoom) {
57 double scale_x = 256/360.0 * Math.pow(2, zoom);
58 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
59 return pt(latlng, scale_x, scale_y);
63 private static Point2D.Double pt(LatLng latlng,
64 double scale_x, double scale_y)
66 Point2D.Double res = new Point2D.Double();
69 res.x = latlng.lng * scale_x;
71 e = Math.sin(Math.toRadians(latlng.lat));
72 e = Math.max(e,-(1-1.0E-15));
73 e = Math.min(e, 1-1.0E-15 );
75 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
79 static private LatLng latlng(Point2D.Double pt,
80 double scale_x, double scale_y)
86 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
87 lat = Math.toDegrees(rads - Math.PI/2);
89 return new LatLng(lat,lng);
93 double scale_x, scale_y;
95 int radius; /* half width/height of tiles to load */
97 private Point2D.Double pt(double lat, double lng) {
98 return pt(new LatLng(lat, lng), scale_x, scale_y);
101 private LatLng latlng(double x, double y) {
102 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
105 private LatLng latlng(Point2D.Double pt) {
106 return latlng(pt, scale_x, scale_y);
110 ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
111 Point2D.Double centre;
113 private Point2D.Double tileCoordOffset(Point p) {
114 return new Point2D.Double(centre.x - p.x*px_size,
115 centre.y - p.y * px_size);
118 private Point tileOffset(Point2D.Double p) {
119 return new Point((int)Math.floor((centre.x+p.x)/px_size),
120 (int)Math.floor((centre.y+p.y)/px_size));
123 private Point2D.Double getBaseLocation(double lat, double lng) {
124 Point2D.Double locn, north_step;
127 // stupid loop structure to please Java's control flow analysis
130 scale_x = 256/360.0 * Math.pow(2, zoom);
131 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
133 north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
134 if (locn.y - north_step.y > px_size)
137 locn.x = -px_size * Math.floor(locn.x/px_size);
138 locn.y = -px_size * Math.floor(locn.y/px_size);
142 public void reset() {
146 public void set_font() {
150 private void loadMap(final AltosSiteMapTile tile,
151 File pngfile, String pngurl)
153 final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
155 SwingUtilities.invokeLater(new Runnable() {
161 System.out.printf("# Failed to fetch file %s\n", pngfile);
162 System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
169 public int prefetchMap(int x, int y) {
170 LatLng map_latlng = latlng(
171 -centre.x + x*px_size + px_size/2,
172 -centre.y + y*px_size + px_size/2);
173 pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
174 pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
175 if (pngfile.exists()) {
177 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
184 public static void prefetchMaps(double lat, double lng, int w, int h) {
185 AltosSiteMap asm = new AltosSiteMap(true);
186 asm.centre = asm.getBaseLocation(lat, lng);
188 //Point2D.Double p = new Point2D.Double();
190 int dx = -w/2, dy = -h/2;
191 for (int y = dy; y < h+dy; y++) {
192 for (int x = dx; x < w+dx; x++) {
193 int r = asm.prefetchMap(x, y);
196 System.out.printf("Already have %s\n", asm.pngfile);
199 System.out.printf("Fetched map %s\n", asm.pngfile);
202 System.out.printf("# Failed to fetch file %s\n", asm.pngfile);
203 System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl);
210 public String initMap(Point offset) {
211 AltosSiteMapTile tile = mapTiles.get(offset);
212 Point2D.Double coord = tileCoordOffset(offset);
214 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
216 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
217 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
218 loadMap(tile, pngfile, pngurl);
219 return pngfile.toString();
222 public void setBaseLocation(double lat, double lng) {
223 for (Point k : mapTiles.keySet()) {
224 AltosSiteMapTile tile = mapTiles.get(k);
228 centre = getBaseLocation(lat, lng);
229 scrollRocketToVisible(pt(lat,lng));
232 private void initMaps(double lat, double lng) {
233 setBaseLocation(lat, lng);
235 Thread thread = new Thread() {
237 for (Point k : mapTiles.keySet())
244 private static File MapFile(double lat, double lng, int zoom) {
245 char chlat = lat < 0 ? 'S' : 'N';
246 char chlng = lng < 0 ? 'W' : 'E';
247 if (lat < 0) lat = -lat;
248 if (lng < 0) lng = -lng;
249 return new File(AltosUIPreferences.mapdir(),
250 String.format("map-%c%.6f,%c%.6f-%d.png",
251 chlat, lat, chlng, lng, zoom));
254 private static String MapURL(double lat, double lng, int zoom) {
255 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);
258 boolean initialised = false;
259 Point2D.Double last_pt = null;
262 public void show(double lat, double lon) {
264 scrollRocketToVisible(pt(lat, lon));
266 public void show(final AltosState state, final int crc_errors) {
267 // if insufficient gps data, nothing to update
268 if (!state.gps.locked && state.gps.nsat < 4)
272 if (state.pad_lat != 0 || state.pad_lon != 0) {
273 initMaps(state.pad_lat, state.pad_lon);
275 } else if (state.gps.lat != 0 || state.gps.lon != 0) {
276 initMaps(state.gps.lat, state.gps.lon);
283 final Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
284 if (last_pt == pt && last_state == state.state)
287 if (last_pt == null) {
290 boolean in_any = false;
291 for (Point offset : mapTiles.keySet()) {
292 AltosSiteMapTile tile = mapTiles.get(offset);
293 Point2D.Double ref, lref;
294 ref = translatePoint(pt, tileCoordOffset(offset));
295 lref = translatePoint(last_pt, tileCoordOffset(offset));
296 tile.show(state, crc_errors, lref, ref);
297 if (0 <= ref.x && ref.x < px_size)
298 if (0 <= ref.y && ref.y < px_size)
302 Point offset = tileOffset(pt);
304 Point2D.Double ref, lref;
305 ref = translatePoint(pt, tileCoordOffset(offset));
306 lref = translatePoint(last_pt, tileCoordOffset(offset));
308 AltosSiteMapTile tile = createTile(offset);
309 tile.show(state, crc_errors, lref, ref);
311 finishTileLater(tile, offset);
314 scrollRocketToVisible(pt);
316 if (offset != tileOffset(last_pt)) {
317 ensureTilesAround(offset);
321 last_state = state.state;
324 public void draw_circle(double lat, double lon) {
325 final Point2D.Double pt = pt(lat, lon);
327 for (Point offset : mapTiles.keySet()) {
328 AltosSiteMapTile tile = mapTiles.get(offset);
329 Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
330 tile.draw_circle(ref);
334 private AltosSiteMapTile createTile(Point offset) {
335 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
336 mapTiles.put(offset, tile);
339 private void finishTileLater(final AltosSiteMapTile tile,
342 SwingUtilities.invokeLater( new Runnable() {
344 addTileAt(tile, offset);
349 private void ensureTilesAround(Point base_offset) {
350 for (int x = -radius; x <= radius; x++) {
351 for (int y = -radius; y <= radius; y++) {
352 Point offset = new Point(base_offset.x + x, base_offset.y + y);
353 if (mapTiles.containsKey(offset))
355 AltosSiteMapTile tile = createTile(offset);
357 finishTileLater(tile, offset);
362 private Point topleft = new Point(0,0);
363 private void scrollRocketToVisible(Point2D.Double pt) {
364 Rectangle r = comp.getVisibleRect();
365 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
366 int dx = (int)copt.x - r.width/2 - r.x;
367 int dy = (int)copt.y - r.height/2 - r.y;
368 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
371 comp.scrollRectToVisible(r);
375 private void addTileAt(AltosSiteMapTile tile, Point offset) {
376 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
377 Math.abs(offset.y) >= MAX_TILE_DELTA)
379 System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
384 boolean review = false;
385 Rectangle r = comp.getVisibleRect();
386 if (offset.x < topleft.x) {
387 r.x += (topleft.x - offset.x) * px_size;
388 topleft.x = offset.x;
391 if (offset.y < topleft.y) {
392 r.y += (topleft.y - offset.y) * px_size;
393 topleft.y = offset.y;
396 GridBagConstraints c = new GridBagConstraints();
397 c.anchor = GridBagConstraints.CENTER;
398 c.fill = GridBagConstraints.BOTH;
399 // put some space between the map tiles, debugging only
400 // c.insets = new Insets(5, 5, 5, 5);
402 c.gridx = offset.x + MAX_TILE_DELTA;
403 c.gridy = offset.y + MAX_TILE_DELTA;
404 layout.setConstraints(tile, c);
408 comp.scrollRectToVisible(r);
412 private AltosSiteMap(boolean knowWhatYouAreDoing) {
413 if (!knowWhatYouAreDoing) {
414 throw new RuntimeException("Arggh.");
418 JComponent comp = new JComponent() { };
419 private GridBagLayout layout = new GridBagLayout();
421 public AltosSiteMap(int in_radius) {
424 GrabNDrag scroller = new GrabNDrag(comp);
426 comp.setLayout(layout);
428 for (int x = -radius; x <= radius; x++) {
429 for (int y = -radius; y <= radius; y++) {
430 Point offset = new Point(x, y);
431 AltosSiteMapTile t = createTile(offset);
432 addTileAt(t, offset);
435 setViewportView(comp);
436 setPreferredSize(new Dimension(500,500));
439 public AltosSiteMap() {