Thread: Regions

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Code:

import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel.MapMode;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Region {

	private static MappedByteBuffer buffer;

	private static final Region[] regions = new Region[20];
	private static final int[][] indices = new int[474][1290];

	private final List<GameObject> objects = new ArrayList<GameObject>();

	private int x;
	private int y;

	private static int index;

	public Region(int x, int y) {
		this.x = x;
		this.y = y;
	}

	public static void initialize() throws Exception {
		RandomAccessFile raf =  new RandomAccessFile("data/worldmap.dat", "r");
		buffer = raf.getChannel().map(MapMode.READ_ONLY, 0, raf.length());
		RandomAccessFile idxFile = new RandomAccessFile("data/worldmap.idx", "r");
		MappedByteBuffer idxBuffer = idxFile.getChannel().map(MapMode.READ_ONLY, 0, idxFile.length());
		while(idxBuffer.hasRemaining()) {
			int x = idxBuffer.getShort();
			int y = idxBuffer.getShort();
			int offset = idxBuffer.getInt();
			indices[x][y] = offset;
		}
	}

	public static Region loadRegion(int x, int y) {
		x = (x >> 3) - 6;
		y = (y >> 3) - 6;
		for(Region region : regions) {
			if(region != null && region.getX() == x && region.getY() == y) {
				return region;
			}
		}
		index = (index + 1) % regions.length;
		Region region = new Region(x, y);
		loadRegion(region);
		regions[index] = region;
		return region;
	}

	public GameObject getObject(int x, int y) {
		for(Iterator<GameObject> it$ = objects.iterator(); it$.hasNext(); ){
			GameObject obj = it$.next();
			if(obj.getX() == x && obj.getY() == y) {
				return obj;
			}
		}
		return null;
	}

	private static void loadRegion(Region region) {
		buffer.position(indices[region.getX()][region.getY()]);
		while(true) {
			int opcode = buffer.get() & 0xFF;
			if(opcode == 0) {
				break;
			} else if(opcode == 1) {
				int id = buffer.getShort();
				int x = buffer.getShort();
				int y = buffer.getShort();
				int height = buffer.get();
				int type = buffer.get();
				int face = buffer.get();
				GameObject obj = new GameObject(id, type, x, y, face, height);
				region.getObjects().add(obj);
			}
		}
	}

	public void setX(int x) {
		this.x = x;
	}

	public int getX() {
		return x;
	}

	public void setY(int y) {
		this.y = y;
	}

	public int getY() {
		return y;
	}

	public List<GameObject> getObjects() {
		return objects;
	}

}

Now, if you have for example woodcutting or mining and you want to replace the rock with an object facing the same direction, you would simply do:

Code:

		Region region = Region.loadRegion(tree.getX(), tree.getY());
		GameObject object = region.getObject(tree.getX(), tree.getY());
		Client.createObject(tree.getX(), tree.getY(), tree.getDepletedId(), object.getFace(), 10);

You might want to check for NullPointers or anything, since I don't know if my dump is complete.

If you are experiencing lag with loading the worldmap ondemand or you have a large amount of ram, you can increase the size of the regions loaded into memory. (It shouldn't be a problem, since it takes less than a ms to load it for me on 1024m and 1.4Ghz)

PS: this can used for other stuff as well, as no-clip prevention or following.

If you have any errors, please post.

This is done for WinterLove, I don't know why.