private static void buildCache(String arg) throws Exception { System.out.println("Loading map..."); List<Chunk> chunks = loadChunks(arg); Rectangle boundingBox = findBoundingBox(chunks); // Convert the chunk bounding box to coordinates bounding box. boundingBox = new Rectangle( boundingBox.getX1() * 16, boundingBox.getY1() * 16, boundingBox.getX2() * 16, boundingBox.getY2() * 16); System.out.println( "Active bounding box: " + boundingBox.getX1() + "x" + boundingBox.getY1() + " " + boundingBox.getX2() + "x" + boundingBox.getY2()); // Build a map of all blocks located at the target coordinates. We add // room to Y. System.out.println("Building block cache..."); BlockMap blockMap = BlockMap.build(chunks, boundingBox, MIN_Y, MAX_Y); blockMap.save(new File(CACHE_FILE)); }