public Chunk loadChunk(int cx, int cy) {
Chunk c = getChunk(cx, cy);
if (c == null) {
c = new Chunk(this, cx, cy);
chunks.put(c.chunkIndex, c);
}
return c;
}
public Chunk getChunk(int cx, int cy) {
return chunks.get(Chunk.getChunkIndex(cx, cy));
}