refactor VectorTileMap

src/org/mapsforge/database/json/MapDatabase.java

@@ -0,0 +1,145 @@
+/*
+ * Copyright 2012 Hannes Janetzek
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mapsforge.database.json;
+
+import java.io.File;
+
+import org.mapsforge.core.BoundingBox;
+import org.mapsforge.core.MercatorProjection;
+import org.mapsforge.core.Tag;
+import org.mapsforge.core.Tile;
+import org.mapsforge.database.FileOpenResult;
+import org.mapsforge.database.IMapDatabase;
+import org.mapsforge.database.IMapDatabaseCallback;
+import org.mapsforge.database.MapFileInfo;
+
+/**
+ * 
+ *
+ */
+public class MapDatabase implements IMapDatabase {
+
+	private float[] mCoords = new float[20];
+	private int[] mIndex = new int[1];
+	// private Tag[] mTags = { new Tag("boundary", "administrative"), new Tag("admin_level", "2") };
+	private Tag[] mTags = { new Tag("building", "yes") };
+	private final MapFileInfo mMapInfo =
+			new MapFileInfo(new BoundingBox(-180, -90, 180, 90),
+					new Byte((byte) 0), null, "Mercator", 0, 0, 0, "de", "yo!", "by me");
+
+	private boolean mOpenFile = false;
+
+	private static double radius = 6378137;
+	private static double D2R = Math.PI / 180;
+
+	// private static double HALF_PI = Math.PI / 2;
+
+	@Override
+	public void executeQuery(Tile tile, IMapDatabaseCallback mapDatabaseCallback) {
+
+		long cx = tile.pixelX + (Tile.TILE_SIZE >> 1);
+		long cy = tile.pixelY + (Tile.TILE_SIZE >> 1);
+		// float lon1 = (float) MercatorProjection.pixelXToLongitude(cx - 100, tile.zoomLevel) * 1000000;
+		// float lon2 = (float) MercatorProjection.pixelXToLongitude(cx + 100, tile.zoomLevel) * 1000000;
+		// float lat1 = (float) MercatorProjection.pixelYToLatitude(cy - 100, tile.zoomLevel) * 1000000;
+		// float lat2 = (float) MercatorProjection.pixelYToLatitude(cy + 100, tile.zoomLevel) * 1000000;
+
+		float lon1 = (float) MercatorProjection.pixelXToLongitude(cx - 100, tile.zoomLevel);
+		float lon2 = (float) MercatorProjection.pixelXToLongitude(cx + 100, tile.zoomLevel);
+		float lat1 = (float) MercatorProjection.pixelYToLatitude(cy - 100, tile.zoomLevel);
+		float lat2 = (float) MercatorProjection.pixelYToLatitude(cy + 100, tile.zoomLevel);
+
+		double lonRadians = (D2R * lon1);
+		double latRadians = (D2R * lat1);
+
+		// spherical mercator projection
+		lon1 = (float) (radius * lonRadians);
+		lat1 = (float) (radius * Math.log(Math.tan(Math.PI * 0.25 + latRadians * 0.5)));
+
+		lonRadians = (D2R * lon2);
+		latRadians = (D2R * lat2);
+
+		lon2 = (float) (radius * lonRadians);
+		lat2 = (float) (radius * Math.log(Math.tan(Math.PI * 0.25 + latRadians * 0.5)));
+
+		mCoords[0] = lon1;
+		mCoords[1] = lat1;
+
+		mCoords[2] = lon2;
+		mCoords[3] = lat1;
+
+		mCoords[4] = lon2;
+		mCoords[5] = lat2;
+
+		mCoords[6] = lon1;
+		mCoords[7] = lat2;
+
+		mCoords[8] = lon1;
+		mCoords[9] = lat1;
+
+		mIndex[0] = 10;
+
+		// lon1 = (float) MercatorProjection.pixelXToLongitude(cx - 80, tile.zoomLevel) * 1000000;
+		// lon2 = (float) MercatorProjection.pixelXToLongitude(cx + 80, tile.zoomLevel) * 1000000;
+		// lat1 = (float) MercatorProjection.pixelYToLatitude(cy - 80, tile.zoomLevel) * 1000000;
+		// lat2 = (float) MercatorProjection.pixelYToLatitude(cy + 80, tile.zoomLevel) * 1000000;
+		//
+		// mCoords[10] = lon1;
+		// mCoords[11] = lat1;
+		//
+		// mCoords[12] = lon2;
+		// mCoords[13] = lat1;
+		//
+		// mCoords[14] = lon2;
+		// mCoords[15] = lat2;
+		//
+		// mCoords[16] = lon1;
+		// mCoords[17] = lat2;
+		//
+		// mCoords[18] = lon1;
+		// mCoords[19] = lat1;
+		//
+		// mIndex[1] = 10;
+
+		mapDatabaseCallback.renderWay((byte) 0, mTags, mCoords, mIndex, true);
+	}
+
+	@Override
+	public MapFileInfo getMapFileInfo() {
+		return mMapInfo;
+	}
+
+	@Override
+	public boolean hasOpenFile() {
+		return mOpenFile;
+	}
+
+	@Override
+	public FileOpenResult openFile(File mapFile) {
+		mOpenFile = true;
+		return new FileOpenResult();
+	}
+
+	@Override
+	public void closeFile() {
+		mOpenFile = false;
+	}
+
+	@Override
+	public String readString(int position) {
+		return null;
+	}
+
+}