public void setMeta(int x, int y, int m) {
Chunk chunk = getChunkI(x, y);
if (chunk == null) return;
TileInstance t = chunk.getTileInstance(x, y);
if (t != null) {
int m0 = t.metadata;
t.metadata = (byte) m;
if (m0 != m) chunk.markDirty();
}
}
public TileInstance getTileInstance(int x, int y) {
Chunk chunk = getChunkI(x, y);
return (chunk != null) ? chunk.getTileInstance(x, y) : null;
}