Moved commons to java root folder.

trunk/java/commons/geodriver/GeoDriver.java

@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2004-2015 L2J Server
+ * 
+ * This file is part of L2J Server.
+ * 
+ * L2J Server 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, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * L2J Server 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, see <http://www.gnu.org/licenses/>.
+ */
+package commons.geodriver;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteOrder;
+import java.nio.channels.FileChannel.MapMode;
+import java.nio.file.Path;
+import java.util.concurrent.atomic.AtomicReferenceArray;
+
+import commons.geodriver.regions.NullRegion;
+import commons.geodriver.regions.Region;
+
+/**
+ * @author HorridoJoho
+ */
+public final class GeoDriver
+{
+	// world dimensions: 1048576 * 1048576 = 1099511627776
+	private static final int WORLD_MIN_X = -655360;
+	private static final int WORLD_MAX_X = 393215;
+	private static final int WORLD_MIN_Y = -589824;
+	private static final int WORLD_MAX_Y = 458751;
+	
+	/** Regions in the world on the x axis */
+	public static final int GEO_REGIONS_X = 32;
+	/** Regions in the world on the y axis */
+	public static final int GEO_REGIONS_Y = 32;
+	/** Region in the world */
+	public static final int GEO_REGIONS = GEO_REGIONS_X * GEO_REGIONS_Y;
+	
+	/** Blocks in the world on the x axis */
+	public static final int GEO_BLOCKS_X = GEO_REGIONS_X * IRegion.REGION_BLOCKS_X;
+	/** Blocks in the world on the y axis */
+	public static final int GEO_BLOCKS_Y = GEO_REGIONS_Y * IRegion.REGION_BLOCKS_Y;
+	/** Blocks in the world */
+	public static final int GEO_BLOCKS = GEO_REGIONS * IRegion.REGION_BLOCKS;
+	
+	/** Cells in the world on the x axis */
+	public static final int GEO_CELLS_X = GEO_BLOCKS_X * IBlock.BLOCK_CELLS_X;
+	/** Cells in the world in the y axis */
+	public static final int GEO_CELLS_Y = GEO_BLOCKS_Y * IBlock.BLOCK_CELLS_Y;
+	
+	/** The regions array */
+	private final AtomicReferenceArray<IRegion> _regions = new AtomicReferenceArray<>(GEO_REGIONS);
+	
+	public GeoDriver()
+	{
+		for (int i = 0; i < _regions.length(); i++)
+		{
+			_regions.set(i, NullRegion.INSTANCE);
+		}
+	}
+	
+	private void checkGeoX(int geoX)
+	{
+		if ((geoX < 0) || (geoX >= GEO_CELLS_X))
+		{
+			throw new IllegalArgumentException();
+		}
+	}
+	
+	private void checkGeoY(int geoY)
+	{
+		if ((geoY < 0) || (geoY >= GEO_CELLS_Y))
+		{
+			throw new IllegalArgumentException();
+		}
+	}
+	
+	private IRegion getRegion(int geoX, int geoY)
+	{
+		checkGeoX(geoX);
+		checkGeoY(geoY);
+		return _regions.get(((geoX / IRegion.REGION_CELLS_X) * GEO_REGIONS_Y) + (geoY / IRegion.REGION_CELLS_Y));
+	}
+	
+	public void loadRegion(Path filePath, int regionX, int regionY) throws IOException
+	{
+		final int regionOffset = (regionX * GEO_REGIONS_Y) + regionY;
+		
+		try (RandomAccessFile raf = new RandomAccessFile(filePath.toFile(), "r"))
+		{
+			_regions.set(regionOffset, new Region(raf.getChannel().map(MapMode.READ_ONLY, 0, raf.length()).order(ByteOrder.LITTLE_ENDIAN)));
+		}
+	}
+	
+	public void unloadRegion(int regionX, int regionY)
+	{
+		_regions.set((regionX * GEO_REGIONS_Y) + regionY, NullRegion.INSTANCE);
+	}
+	
+	public boolean hasGeoPos(int geoX, int geoY)
+	{
+		return getRegion(geoX, geoY).hasGeo();
+	}
+	
+	public boolean checkNearestNswe(int geoX, int geoY, int worldZ, int nswe)
+	{
+		return getRegion(geoX, geoY).checkNearestNswe(geoX, geoY, worldZ, nswe);
+	}
+	
+	public int getNearestZ(int geoX, int geoY, int worldZ)
+	{
+		return getRegion(geoX, geoY).getNearestZ(geoX, geoY, worldZ);
+	}
+	
+	public int getNextLowerZ(int geoX, int geoY, int worldZ)
+	{
+		return getRegion(geoX, geoY).getNextLowerZ(geoX, geoY, worldZ);
+	}
+	
+	public int getNextHigherZ(int geoX, int geoY, int worldZ)
+	{
+		return getRegion(geoX, geoY).getNextHigherZ(geoX, geoY, worldZ);
+	}
+	
+	public int getGeoX(int worldX)
+	{
+		if ((worldX < WORLD_MIN_X) || (worldX > WORLD_MAX_X))
+		{
+			throw new IllegalArgumentException();
+		}
+		return (worldX - WORLD_MIN_X) / 16;
+	}
+	
+	public int getGeoY(int worldY)
+	{
+		if ((worldY < WORLD_MIN_Y) || (worldY > WORLD_MAX_Y))
+		{
+			throw new IllegalArgumentException();
+		}
+		return (worldY - WORLD_MIN_Y) / 16;
+	}
+	
+	public int getWorldX(int geoX)
+	{
+		checkGeoX(geoX);
+		return (geoX * 16) + WORLD_MIN_X + 8;
+	}
+	
+	public int getWorldY(int geoY)
+	{
+		checkGeoY(geoY);
+		return (geoY * 16) + WORLD_MIN_Y + 8;
+	}
+}