add Tile/TileChunk serialization helpers

src/com/blarg/gdx/tilemap3d/TileChunk.java

@@ -23,6 +23,10 @@ public class TileChunk extends TileContainer implements Disposable {
 	public TileChunkMesh alphaMesh;
 	public final TileMap tileMap;
 
+	public Tile[] getData() {
+		return data;
+	}
+
 	@Override
 	public int getWidth() {
 		return width;

src/com/blarg/gdx/tilemap3d/serialization/TileChunkSerializer.java

@@ -0,0 +1,36 @@
+package com.blarg.gdx.tilemap3d.serialization;
+
+import com.blarg.gdx.tilemap3d.Tile;
+import com.blarg.gdx.tilemap3d.TileChunk;
+
+import java.nio.ByteBuffer;
+
+public class TileChunkSerializer {
+	public static void serialize(TileChunk chunk, ByteBuffer buffer) {
+		Tile[] tiles = chunk.getData();
+		for (int i = 0; i < tiles.length; ++i)
+			serialize(tiles[i], buffer);
+	}
+
+	public static void deserialize(ByteBuffer buffer, TileChunk out) {
+		Tile[] tiles = out.getData();
+		for (int i = 0; i < tiles.length; ++i)
+			deserialize(buffer, tiles[i]);
+	}
+
+	public static void serialize(Tile tile, ByteBuffer buffer) {
+		buffer.putShort(tile.tile);
+		buffer.putShort(tile.flags);
+		buffer.put(tile.tileLight);
+		buffer.put(tile.skyLight);
+		buffer.putInt(tile.color);
+	}
+
+	public static void deserialize(ByteBuffer buffer, Tile out) {
+		out.tile = buffer.getShort();
+		out.flags = buffer.getShort();
+		out.tileLight = buffer.get();
+		out.skyLight = buffer.get();
+		out.color = buffer.getInt();
+	}
+}