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;
35 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
36 // preferred vertical step in a tile in naut. miles
37 // will actually choose a step size between x and 2x, where this
39 static final double tile_size_nmi = 0.75;
41 static final int px_size = 512;
43 static final int MAX_TILE_DELTA = 100;
45 private static Point2D.Double translatePoint(Point2D.Double p,
48 return new Point2D.Double(p.x + d.x, p.y + d.y);
52 public double lat, lng;
53 public LatLng(double lat, double lng) {
60 // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
61 // search for fromLatLngToPoint and fromPointToLatLng
62 private static Point2D.Double pt(LatLng latlng, int zoom) {
63 double scale_x = 256/360.0 * Math.pow(2, zoom);
64 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
65 return pt(latlng, scale_x, scale_y);
68 private static Point2D.Double pt(LatLng latlng,
69 double scale_x, double scale_y)
71 Point2D.Double res = new Point2D.Double();
74 res.x = latlng.lng * scale_x;
76 e = Math.sin(Math.toRadians(latlng.lat));
77 e = Math.max(e,-(1-1.0E-15));
78 e = Math.min(e, 1-1.0E-15 );
80 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
84 static private LatLng latlng(Point2D.Double pt,
85 double scale_x, double scale_y)
91 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
92 lat = Math.toDegrees(rads - Math.PI/2);
94 return new LatLng(lat,lng);
98 double scale_x, scale_y;
100 int radius; /* half width/height of tiles to load */
102 private Point2D.Double pt(double lat, double lng) {
103 return pt(new LatLng(lat, lng), scale_x, scale_y);
106 private LatLng latlng(double x, double y) {
107 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
109 private LatLng latlng(Point2D.Double pt) {
110 return latlng(pt, scale_x, scale_y);
113 HashMap<Point,AltosSiteMapTile> mapTiles = new HashMap<Point,AltosSiteMapTile>();
114 Point2D.Double centre;
116 private Point2D.Double tileCoordOffset(Point p) {
117 return new Point2D.Double(centre.x - p.x*px_size,
118 centre.y - p.y * px_size);
121 private Point tileOffset(Point2D.Double p) {
122 return new Point((int)Math.floor((centre.x+p.x)/px_size),
123 (int)Math.floor((centre.y+p.y)/px_size));
126 private Point2D.Double getBaseLocation(double lat, double lng) {
127 Point2D.Double locn, north_step;
130 // stupid loop structure to please Java's control flow analysis
133 scale_x = 256/360.0 * Math.pow(2, zoom);
134 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
136 north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
137 if (locn.y - north_step.y > px_size)
140 locn.x = -px_size * Math.floor(locn.x/px_size);
141 locn.y = -px_size * Math.floor(locn.y/px_size);
145 public void reset() {
149 private void loadMap(final AltosSiteMapTile tile,
150 File pngfile, String pngurl)
152 final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
154 SwingUtilities.invokeLater(new Runnable() {
160 System.out.printf("# Failed to fetch file %s\n", pngfile);
161 System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
168 public int prefetchMap(int x, int y) {
169 LatLng map_latlng = latlng(
170 -centre.x + x*px_size + px_size/2,
171 -centre.y + y*px_size + px_size/2);
172 pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
173 pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
174 if (pngfile.exists()) {
176 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
183 public static void prefetchMaps(double lat, double lng, int w, int h) {
184 AltosSiteMap asm = new AltosSiteMap(true);
185 asm.centre = asm.getBaseLocation(lat, lng);
187 Point2D.Double p = new Point2D.Double();
189 int dx = -w/2, dy = -h/2;
190 for (int y = dy; y < h+dy; y++) {
191 for (int x = dx; x < w+dx; x++) {
192 int r = asm.prefetchMap(x, y);
195 System.out.printf("Already have %s\n", asm.pngfile);
198 System.out.printf("Fetched map %s\n", asm.pngfile);
201 System.out.printf("# Failed to fetch file %s\n", asm.pngfile);
202 System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl);
209 public String initMap(Point offset) {
210 AltosSiteMapTile tile = mapTiles.get(offset);
211 Point2D.Double coord = tileCoordOffset(offset);
213 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
215 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
216 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
217 loadMap(tile, pngfile, pngurl);
218 return pngfile.toString();
221 public void setBaseLocation(double lat, double lng) {
222 for (Point k : mapTiles.keySet()) {
223 AltosSiteMapTile tile = mapTiles.get(k);
227 centre = getBaseLocation(lat, lng);
228 scrollRocketToVisible(pt(lat,lng));
231 private void initMaps(double lat, double lng) {
232 setBaseLocation(lat, lng);
234 Thread thread = new Thread() {
236 for (Point k : mapTiles.keySet())
243 private static File MapFile(double lat, double lng, int zoom) {
244 char chlat = lat < 0 ? 'S' : 'N';
245 char chlng = lng < 0 ? 'W' : 'E';
246 if (lat < 0) lat = -lat;
247 if (lng < 0) lng = -lng;
248 return new File(AltosPreferences.mapdir(),
249 String.format("map-%c%.6f,%c%.6f-%d.png",
250 chlat, lat, chlng, lng, zoom));
253 private static String MapURL(double lat, double lng, int zoom) {
254 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);
257 boolean initialised = false;
258 Point2D.Double last_pt = null;
261 public void show(double lat, double lon) {
263 scrollRocketToVisible(pt(lat, lon));
265 public void show(final AltosState state, final int crc_errors) {
266 // if insufficient gps data, nothing to update
267 if (!state.gps.locked && state.gps.nsat < 4)
271 if (state.pad_lat != 0 || state.pad_lon != 0) {
272 initMaps(state.pad_lat, state.pad_lon);
274 } else if (state.gps.lat != 0 || state.gps.lon != 0) {
275 initMaps(state.gps.lat, state.gps.lon);
282 final Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
283 if (last_pt == pt && last_state == state.state)
286 if (last_pt == null) {
289 boolean in_any = false;
290 for (Point offset : mapTiles.keySet()) {
291 AltosSiteMapTile tile = mapTiles.get(offset);
292 Point2D.Double ref, lref;
293 ref = translatePoint(pt, tileCoordOffset(offset));
294 lref = translatePoint(last_pt, tileCoordOffset(offset));
295 tile.show(state, crc_errors, lref, ref);
296 if (0 <= ref.x && ref.x < px_size)
297 if (0 <= ref.y && ref.y < px_size)
301 Point offset = tileOffset(pt);
303 Point2D.Double ref, lref;
304 ref = translatePoint(pt, tileCoordOffset(offset));
305 lref = translatePoint(last_pt, tileCoordOffset(offset));
307 AltosSiteMapTile tile = createTile(offset);
308 tile.show(state, crc_errors, lref, ref);
310 finishTileLater(tile, offset);
313 scrollRocketToVisible(pt);
315 if (offset != tileOffset(last_pt)) {
316 ensureTilesAround(offset);
320 last_state = state.state;
323 public void draw_circle(double lat, double lon) {
324 final Point2D.Double pt = pt(lat, lon);
326 for (Point offset : mapTiles.keySet()) {
327 AltosSiteMapTile tile = mapTiles.get(offset);
328 Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
329 tile.draw_circle(ref);
333 private AltosSiteMapTile createTile(Point offset) {
334 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
335 mapTiles.put(offset, tile);
338 private void finishTileLater(final AltosSiteMapTile tile,
341 SwingUtilities.invokeLater( new Runnable() {
343 addTileAt(tile, offset);
348 private void ensureTilesAround(Point base_offset) {
349 for (int x = -radius; x <= radius; x++) {
350 for (int y = -radius; y <= radius; y++) {
351 Point offset = new Point(base_offset.x + x, base_offset.y + y);
352 if (mapTiles.containsKey(offset))
354 AltosSiteMapTile tile = createTile(offset);
356 finishTileLater(tile, offset);
361 private Point topleft = new Point(0,0);
362 private void scrollRocketToVisible(Point2D.Double pt) {
363 Rectangle r = comp.getVisibleRect();
364 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
365 int dx = (int)copt.x - r.width/2 - r.x;
366 int dy = (int)copt.y - r.height/2 - r.y;
367 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
370 comp.scrollRectToVisible(r);
374 private void addTileAt(AltosSiteMapTile tile, Point offset) {
375 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
376 Math.abs(offset.y) >= MAX_TILE_DELTA)
378 System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
383 boolean review = false;
384 Rectangle r = comp.getVisibleRect();
385 if (offset.x < topleft.x) {
386 r.x += (topleft.x - offset.x) * px_size;
387 topleft.x = offset.x;
390 if (offset.y < topleft.y) {
391 r.y += (topleft.y - offset.y) * px_size;
392 topleft.y = offset.y;
395 GridBagConstraints c = new GridBagConstraints();
396 c.anchor = GridBagConstraints.CENTER;
397 c.fill = GridBagConstraints.BOTH;
398 // put some space between the map tiles, debugging only
399 // c.insets = new Insets(5, 5, 5, 5);
401 c.gridx = offset.x + MAX_TILE_DELTA;
402 c.gridy = offset.y + MAX_TILE_DELTA;
403 layout.setConstraints(tile, c);
407 comp.scrollRectToVisible(r);
411 private AltosSiteMap(boolean knowWhatYouAreDoing) {
412 if (!knowWhatYouAreDoing) {
413 throw new RuntimeException("Arggh.");
417 JComponent comp = new JComponent() { };
418 private GridBagLayout layout = new GridBagLayout();
420 public AltosSiteMap(int in_radius) {
423 GrabNDrag scroller = new GrabNDrag(comp);
425 comp.setLayout(layout);
427 for (int x = -radius; x <= radius; x++) {
428 for (int y = -radius; y <= radius; y++) {
429 Point offset = new Point(x, y);
430 AltosSiteMapTile t = createTile(offset);
431 addTileAt(t, offset);
434 setViewportView(comp);
435 setPreferredSize(new Dimension(500,500));
438 public AltosSiteMap() {