public void addOre(Ore ore) {
		switch (ore) {
		case STONE: xStone++; break;
		case IRON: xIron++; break;
		case GOLD: xGold++; break;
		case DIAMOND: xDiamond++; break;
		case EMERALD: xEmerald++; break;
		case LAPIS: xLapis++; break;
		default: break;
		}
		
		if (xLevelUpdate == XLEVEL_UPDATE_INTERVAL) {
			calcXlevel();
			xLevelUpdate = 0;
		} else xLevelUpdate++;
	}