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
55 private static Point2D.Double pt(LatLng latlng, int zoom) {
56 double scale_x = 256/360.0 * Math.pow(2, zoom);
57 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
58 return pt(latlng, scale_x, scale_y);
61 private static Point2D.Double pt(LatLng latlng,
62 double scale_x, double scale_y)
64 Point2D.Double res = new Point2D.Double();
67 res.x = latlng.lng * scale_x;
69 e = Math.sin(Math.toRadians(latlng.lat));
70 e = Math.max(e,-(1-1.0E-15));
71 e = Math.min(e, 1-1.0E-15 );
73 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
77 static private LatLng latlng(Point2D.Double pt,
78 double scale_x, double scale_y)
84 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
85 lat = Math.toDegrees(rads - Math.PI/2);
87 return new LatLng(lat,lng);
91 double scale_x, scale_y;
93 int radius; /* half width/height of tiles to load */
95 private Point2D.Double pt(double lat, double lng) {
96 return pt(new LatLng(lat, lng), scale_x, scale_y);
99 private LatLng latlng(double x, double y) {
100 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
102 private LatLng latlng(Point2D.Double pt) {
103 return latlng(pt, scale_x, scale_y);
106 ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
107 Point2D.Double centre;
109 private Point2D.Double tileCoordOffset(Point p) {
110 return new Point2D.Double(centre.x - p.x*px_size,
111 centre.y - p.y * px_size);
114 private Point tileOffset(Point2D.Double p) {
115 return new Point((int)Math.floor((centre.x+p.x)/px_size),
116 (int)Math.floor((centre.y+p.y)/px_size));
119 private Point2D.Double getBaseLocation(double lat, double lng) {
120 Point2D.Double locn, north_step;
123 // stupid loop structure to please Java's control flow analysis
126 scale_x = 256/360.0 * Math.pow(2, zoom);
127 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
129 north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
130 if (locn.y - north_step.y > px_size)
133 locn.x = -px_size * Math.floor(locn.x/px_size);
134 locn.y = -px_size * Math.floor(locn.y/px_size);
138 public void reset() {
142 public void set_font() {
146 private void loadMap(final AltosSiteMapTile tile,
147 File pngfile, String pngurl)
149 final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
151 SwingUtilities.invokeLater(new Runnable() {
157 System.out.printf("# Failed to fetch file %s\n", pngfile);
158 System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
165 public int prefetchMap(int x, int y) {
166 LatLng map_latlng = latlng(
167 -centre.x + x*px_size + px_size/2,
168 -centre.y + y*px_size + px_size/2);
169 pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
170 pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
171 if (pngfile.exists()) {
173 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
180 public static void prefetchMaps(double lat, double lng, int w, int h) {
181 AltosSiteMap asm = new AltosSiteMap(true);
182 asm.centre = asm.getBaseLocation(lat, lng);
184 Point2D.Double p = new Point2D.Double();
186 int dx = -w/2, dy = -h/2;
187 for (int y = dy; y < h+dy; y++) {
188 for (int x = dx; x < w+dx; x++) {
189 int r = asm.prefetchMap(x, y);
192 System.out.printf("Already have %s\n", asm.pngfile);
195 System.out.printf("Fetched map %s\n", asm.pngfile);
198 System.out.printf("# Failed to fetch file %s\n", asm.pngfile);
199 System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl);
206 public String initMap(Point offset) {
207 AltosSiteMapTile tile = mapTiles.get(offset);
208 Point2D.Double coord = tileCoordOffset(offset);
210 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
212 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
213 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
214 loadMap(tile, pngfile, pngurl);
215 return pngfile.toString();
218 public void setBaseLocation(double lat, double lng) {
219 for (Point k : mapTiles.keySet()) {
220 AltosSiteMapTile tile = mapTiles.get(k);
224 centre = getBaseLocation(lat, lng);
225 scrollRocketToVisible(pt(lat,lng));
228 private void initMaps(double lat, double lng) {
229 setBaseLocation(lat, lng);
231 Thread thread = new Thread() {
233 for (Point k : mapTiles.keySet())
240 private static File MapFile(double lat, double lng, int zoom) {
241 char chlat = lat < 0 ? 'S' : 'N';
242 char chlng = lng < 0 ? 'W' : 'E';
243 if (lat < 0) lat = -lat;
244 if (lng < 0) lng = -lng;
245 return new File(AltosUIPreferences.mapdir(),
246 String.format("map-%c%.6f,%c%.6f-%d.png",
247 chlat, lat, chlng, lng, zoom));
250 private static String MapURL(double lat, double lng, int zoom) {
251 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);
254 boolean initialised = false;
255 Point2D.Double last_pt = null;
258 public void show(double lat, double lon) {
260 scrollRocketToVisible(pt(lat, lon));
262 public void show(final AltosState state, final int crc_errors) {
263 // if insufficient gps data, nothing to update
264 if (!state.gps.locked && state.gps.nsat < 4)
268 if (state.pad_lat != 0 || state.pad_lon != 0) {
269 initMaps(state.pad_lat, state.pad_lon);
271 } else if (state.gps.lat != 0 || state.gps.lon != 0) {
272 initMaps(state.gps.lat, state.gps.lon);
279 final Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
280 if (last_pt == pt && last_state == state.state)
283 if (last_pt == null) {
286 boolean in_any = false;
287 for (Point offset : mapTiles.keySet()) {
288 AltosSiteMapTile tile = mapTiles.get(offset);
289 Point2D.Double ref, lref;
290 ref = translatePoint(pt, tileCoordOffset(offset));
291 lref = translatePoint(last_pt, tileCoordOffset(offset));
292 tile.show(state, crc_errors, lref, ref);
293 if (0 <= ref.x && ref.x < px_size)
294 if (0 <= ref.y && ref.y < px_size)
298 Point offset = tileOffset(pt);
300 Point2D.Double ref, lref;
301 ref = translatePoint(pt, tileCoordOffset(offset));
302 lref = translatePoint(last_pt, tileCoordOffset(offset));
304 AltosSiteMapTile tile = createTile(offset);
305 tile.show(state, crc_errors, lref, ref);
307 finishTileLater(tile, offset);
310 scrollRocketToVisible(pt);
312 if (offset != tileOffset(last_pt)) {
313 ensureTilesAround(offset);
317 last_state = state.state;
320 public void draw_circle(double lat, double lon) {
321 final Point2D.Double pt = pt(lat, lon);
323 for (Point offset : mapTiles.keySet()) {
324 AltosSiteMapTile tile = mapTiles.get(offset);
325 Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
326 tile.draw_circle(ref);
330 private AltosSiteMapTile createTile(Point offset) {
331 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
332 mapTiles.put(offset, tile);
335 private void finishTileLater(final AltosSiteMapTile tile,
338 SwingUtilities.invokeLater( new Runnable() {
340 addTileAt(tile, offset);
345 private void ensureTilesAround(Point base_offset) {
346 for (int x = -radius; x <= radius; x++) {
347 for (int y = -radius; y <= radius; y++) {
348 Point offset = new Point(base_offset.x + x, base_offset.y + y);
349 if (mapTiles.containsKey(offset))
351 AltosSiteMapTile tile = createTile(offset);
353 finishTileLater(tile, offset);
358 private Point topleft = new Point(0,0);
359 private void scrollRocketToVisible(Point2D.Double pt) {
360 Rectangle r = comp.getVisibleRect();
361 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
362 int dx = (int)copt.x - r.width/2 - r.x;
363 int dy = (int)copt.y - r.height/2 - r.y;
364 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
367 comp.scrollRectToVisible(r);
371 private void addTileAt(AltosSiteMapTile tile, Point offset) {
372 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
373 Math.abs(offset.y) >= MAX_TILE_DELTA)
375 System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
380 boolean review = false;
381 Rectangle r = comp.getVisibleRect();
382 if (offset.x < topleft.x) {
383 r.x += (topleft.x - offset.x) * px_size;
384 topleft.x = offset.x;
387 if (offset.y < topleft.y) {
388 r.y += (topleft.y - offset.y) * px_size;
389 topleft.y = offset.y;
392 GridBagConstraints c = new GridBagConstraints();
393 c.anchor = GridBagConstraints.CENTER;
394 c.fill = GridBagConstraints.BOTH;
395 // put some space between the map tiles, debugging only
396 // c.insets = new Insets(5, 5, 5, 5);
398 c.gridx = offset.x + MAX_TILE_DELTA;
399 c.gridy = offset.y + MAX_TILE_DELTA;
400 layout.setConstraints(tile, c);
404 comp.scrollRectToVisible(r);
408 private AltosSiteMap(boolean knowWhatYouAreDoing) {
409 if (!knowWhatYouAreDoing) {
410 throw new RuntimeException("Arggh.");
414 JComponent comp = new JComponent() { };
415 private GridBagLayout layout = new GridBagLayout();
417 public AltosSiteMap(int in_radius) {
420 GrabNDrag scroller = new GrabNDrag(comp);
422 comp.setLayout(layout);
424 for (int x = -radius; x <= radius; x++) {
425 for (int y = -radius; y <= radius; y++) {
426 Point offset = new Point(x, y);
427 AltosSiteMapTile t = createTile(offset);
428 addTileAt(t, offset);
431 setViewportView(comp);
432 setPreferredSize(new Dimension(500,500));
435 public AltosSiteMap() {