/* * Copyright © 2010 Anthony Towns * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ package altosui; import java.awt.*; import javax.swing.*; import java.io.*; import java.lang.Math; import java.awt.geom.Point2D; import java.util.concurrent.*; import org.altusmetrum.AltosLib.*; public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay { // preferred vertical step in a tile in naut. miles // will actually choose a step size between x and 2x, where this // is 1.5x static final double tile_size_nmi = 0.75; static final int px_size = 512; static final int MAX_TILE_DELTA = 100; private static Point2D.Double translatePoint(Point2D.Double p, Point2D.Double d) { return new Point2D.Double(p.x + d.x, p.y + d.y); } static class LatLng { public double lat, lng; public LatLng(double lat, double lng) { this.lat = lat; this.lng = lng; } } // based on google js // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js // search for fromLatLngToPoint and fromPointToLatLng /* private static Point2D.Double pt(LatLng latlng, int zoom) { double scale_x = 256/360.0 * Math.pow(2, zoom); double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom); return pt(latlng, scale_x, scale_y); } */ private static Point2D.Double pt(LatLng latlng, double scale_x, double scale_y) { Point2D.Double res = new Point2D.Double(); double e; res.x = latlng.lng * scale_x; e = Math.sin(Math.toRadians(latlng.lat)); e = Math.max(e,-(1-1.0E-15)); e = Math.min(e, 1-1.0E-15 ); res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y; return res; } static private LatLng latlng(Point2D.Double pt, double scale_x, double scale_y) { double lat, lng; double rads; lng = pt.x/scale_x; rads = 2 * Math.atan(Math.exp(-pt.y/scale_y)); lat = Math.toDegrees(rads - Math.PI/2); return new LatLng(lat,lng); } int zoom; double scale_x, scale_y; int radius; /* half width/height of tiles to load */ private Point2D.Double pt(double lat, double lng) { return pt(new LatLng(lat, lng), scale_x, scale_y); } private LatLng latlng(double x, double y) { return latlng(new Point2D.Double(x,y), scale_x, scale_y); } /* private LatLng latlng(Point2D.Double pt) { return latlng(pt, scale_x, scale_y); } */ ConcurrentHashMap mapTiles = new ConcurrentHashMap(); Point2D.Double centre; private Point2D.Double tileCoordOffset(Point p) { return new Point2D.Double(centre.x - p.x*px_size, centre.y - p.y * px_size); } private Point tileOffset(Point2D.Double p) { return new Point((int)Math.floor((centre.x+p.x)/px_size), (int)Math.floor((centre.y+p.y)/px_size)); } private Point2D.Double getBaseLocation(double lat, double lng) { Point2D.Double locn, north_step; zoom = 2; // stupid loop structure to please Java's control flow analysis do { zoom++; scale_x = 256/360.0 * Math.pow(2, zoom); scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom); locn = pt(lat, lng); north_step = pt(lat+tile_size_nmi*4/3/60.0, lng); if (locn.y - north_step.y > px_size) break; } while (zoom < 22); locn.x = -px_size * Math.floor(locn.x/px_size); locn.y = -px_size * Math.floor(locn.y/px_size); return locn; } public void reset() { // nothing } public void set_font() { // nothing } private void loadMap(final AltosSiteMapTile tile, File pngfile, String pngurl) { final ImageIcon res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl); if (res != null) { SwingUtilities.invokeLater(new Runnable() { public void run() { tile.loadMap(res); } }); } else { System.out.printf("# Failed to fetch file %s\n", pngfile); System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl); } } File pngfile; String pngurl; public int prefetchMap(int x, int y) { LatLng map_latlng = latlng( -centre.x + x*px_size + px_size/2, -centre.y + y*px_size + px_size/2); pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom); pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom); if (pngfile.exists()) { return 1; } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) { return 0; } else { return -1; } } public static void prefetchMaps(double lat, double lng, int w, int h) { AltosSiteMap asm = new AltosSiteMap(true); asm.centre = asm.getBaseLocation(lat, lng); //Point2D.Double p = new Point2D.Double(); //Point2D.Double p2; int dx = -w/2, dy = -h/2; for (int y = dy; y < h+dy; y++) { for (int x = dx; x < w+dx; x++) { int r = asm.prefetchMap(x, y); switch (r) { case 1: System.out.printf("Already have %s\n", asm.pngfile); break; case 0: System.out.printf("Fetched map %s\n", asm.pngfile); break; case -1: System.out.printf("# Failed to fetch file %s\n", asm.pngfile); System.out.printf(" wget -O '%s' ''\n", asm.pngfile, asm.pngurl); break; } } } } public String initMap(Point offset) { AltosSiteMapTile tile = mapTiles.get(offset); Point2D.Double coord = tileCoordOffset(offset); LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y); File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom); String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom); loadMap(tile, pngfile, pngurl); return pngfile.toString(); } public void setBaseLocation(double lat, double lng) { for (Point k : mapTiles.keySet()) { AltosSiteMapTile tile = mapTiles.get(k); tile.clearMap(); } centre = getBaseLocation(lat, lng); scrollRocketToVisible(pt(lat,lng)); } private void initMaps(double lat, double lng) { setBaseLocation(lat, lng); Thread thread = new Thread() { public void run() { for (Point k : mapTiles.keySet()) initMap(k); } }; thread.start(); } private static File MapFile(double lat, double lng, int zoom) { char chlat = lat < 0 ? 'S' : 'N'; char chlng = lng < 0 ? 'W' : 'E'; if (lat < 0) lat = -lat; if (lng < 0) lng = -lng; return new File(AltosUIPreferences.mapdir(), String.format("map-%c%.6f,%c%.6f-%d.png", chlat, lat, chlng, lng, zoom)); } private static String MapURL(double lat, double lng, int zoom) { 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); } boolean initialised = false; Point2D.Double last_pt = null; int last_state = -1; public void show(double lat, double lon) { initMaps(lat, lon); scrollRocketToVisible(pt(lat, lon)); } public void show(final AltosState state, final int crc_errors) { // if insufficient gps data, nothing to update if (!state.gps.locked && state.gps.nsat < 4) return; if (!initialised) { if (state.pad_lat != 0 || state.pad_lon != 0) { initMaps(state.pad_lat, state.pad_lon); initialised = true; } else if (state.gps.lat != 0 || state.gps.lon != 0) { initMaps(state.gps.lat, state.gps.lon); initialised = true; } else { return; } } final Point2D.Double pt = pt(state.gps.lat, state.gps.lon); if (last_pt == pt && last_state == state.state) return; if (last_pt == null) { last_pt = pt; } boolean in_any = false; for (Point offset : mapTiles.keySet()) { AltosSiteMapTile tile = mapTiles.get(offset); Point2D.Double ref, lref; ref = translatePoint(pt, tileCoordOffset(offset)); lref = translatePoint(last_pt, tileCoordOffset(offset)); tile.show(state, crc_errors, lref, ref); if (0 <= ref.x && ref.x < px_size) if (0 <= ref.y && ref.y < px_size) in_any = true; } Point offset = tileOffset(pt); if (!in_any) { Point2D.Double ref, lref; ref = translatePoint(pt, tileCoordOffset(offset)); lref = translatePoint(last_pt, tileCoordOffset(offset)); AltosSiteMapTile tile = createTile(offset); tile.show(state, crc_errors, lref, ref); initMap(offset); finishTileLater(tile, offset); } scrollRocketToVisible(pt); if (offset != tileOffset(last_pt)) { ensureTilesAround(offset); } last_pt = pt; last_state = state.state; } public void draw_circle(double lat, double lon) { final Point2D.Double pt = pt(lat, lon); for (Point offset : mapTiles.keySet()) { AltosSiteMapTile tile = mapTiles.get(offset); Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset)); tile.draw_circle(ref); } } private AltosSiteMapTile createTile(Point offset) { AltosSiteMapTile tile = new AltosSiteMapTile(px_size); mapTiles.put(offset, tile); return tile; } private void finishTileLater(final AltosSiteMapTile tile, final Point offset) { SwingUtilities.invokeLater( new Runnable() { public void run() { addTileAt(tile, offset); } } ); } private void ensureTilesAround(Point base_offset) { for (int x = -radius; x <= radius; x++) { for (int y = -radius; y <= radius; y++) { Point offset = new Point(base_offset.x + x, base_offset.y + y); if (mapTiles.containsKey(offset)) continue; AltosSiteMapTile tile = createTile(offset); initMap(offset); finishTileLater(tile, offset); } } } private Point topleft = new Point(0,0); private void scrollRocketToVisible(Point2D.Double pt) { Rectangle r = comp.getVisibleRect(); Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft)); int dx = (int)copt.x - r.width/2 - r.x; int dy = (int)copt.y - r.height/2 - r.y; if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) { r.x += dx; r.y += dy; comp.scrollRectToVisible(r); } } private void addTileAt(AltosSiteMapTile tile, Point offset) { if (Math.abs(offset.x) >= MAX_TILE_DELTA || Math.abs(offset.y) >= MAX_TILE_DELTA) { System.out.printf("Rocket too far away from pad (tile %d,%d)\n", offset.x, offset.y); return; } boolean review = false; Rectangle r = comp.getVisibleRect(); if (offset.x < topleft.x) { r.x += (topleft.x - offset.x) * px_size; topleft.x = offset.x; review = true; } if (offset.y < topleft.y) { r.y += (topleft.y - offset.y) * px_size; topleft.y = offset.y; review = true; } GridBagConstraints c = new GridBagConstraints(); c.anchor = GridBagConstraints.CENTER; c.fill = GridBagConstraints.BOTH; // put some space between the map tiles, debugging only // c.insets = new Insets(5, 5, 5, 5); c.gridx = offset.x + MAX_TILE_DELTA; c.gridy = offset.y + MAX_TILE_DELTA; layout.setConstraints(tile, c); comp.add(tile); if (review) { comp.scrollRectToVisible(r); } } private AltosSiteMap(boolean knowWhatYouAreDoing) { if (!knowWhatYouAreDoing) { throw new RuntimeException("Arggh."); } } JComponent comp = new JComponent() { }; private GridBagLayout layout = new GridBagLayout(); public AltosSiteMap(int in_radius) { radius = in_radius; GrabNDrag scroller = new GrabNDrag(comp); comp.setLayout(layout); for (int x = -radius; x <= radius; x++) { for (int y = -radius; y <= radius; y++) { Point offset = new Point(x, y); AltosSiteMapTile t = createTile(offset); addTileAt(t, offset); } } setViewportView(comp); setPreferredSize(new Dimension(500,500)); } public AltosSiteMap() { this(1); } }