public boolean addCharacter(Character character){
		int positionX=character.getXPosition();
		int positionY=character.getYPosition();
		
		if (mapObjectGrid[positionX][positionY]==null && characterGrid[positionX][positionY]==null){
			characterGrid[positionX][positionY]=character;
			return true;
		}
		else
			return false;
		
	}