private void MoveCamera()
	{
		float xPos = Input.mousePosition.x;
		float yPos = Input.mousePosition.y;
		Vector3 movement = new Vector3(0,0,0);

		//horizontal movement
		if(xPos >= 0 && xPos < ResourceManager.scrollWidth)
		{
			movement.x=-Time.deltaTime*ResourceManager.scrollSpeed;
		}
		else if(xPos <= Screen.width && xPos > Screen.width - ResourceManager.scrollWidth)
		{
			movement.x=Time.deltaTime*ResourceManager.scrollSpeed;
		}

		//vertical movement
		if(yPos >= 0 && yPos < ResourceManager.scrollWidth)
		{
			movement.z=-Time.deltaTime*ResourceManager.scrollSpeed;
		}
		else if (yPos <= Screen.height && yPos > Screen.height-ResourceManager.scrollWidth)
		{
			movement.z=Time.deltaTime*ResourceManager.scrollSpeed;
		}

		//makes the movement take the rotation of the camera into account
		movement = Camera.main.transform.TransformDirection(movement);
		movement.y=0;

		//find movement direction
		Vector3 origin = Camera.main.transform.position;
		Vector3 destination = origin;
		destination.x+=movement.x;
		destination.z+=movement.z;

		//move camera if the XZ-position has changed
		if(destination!=origin)
		{
			Camera.main.transform.position = Vector3.MoveTowards(origin, destination, ResourceManager.maxCameraMoveSpeed);
		}

		//set zoom
		movement.y-=ResourceManager.zoomSpeed*Input.GetAxis("Mouse ScrollWheel");

		destination=origin;
		destination.y+=movement.y;
		destination.y=Mathf.Clamp (destination.y, ResourceManager.minCameraHeight, ResourceManager.maxCameraHeight);

		//move camera if Y-position has changed
		if(destination!=origin)
		{
			Camera.main.transform.position = destination;
		}
	}