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));
}