這種方式是通過控制相機的旋轉，位置來檢視物體。

下面的程式碼是通過修改官方的MouseOrbit程式碼產生，加了縮放功能，以及縮放，旋轉，位移的緩動，讓它不再那麼生硬。

需要將下面的程式碼放到相機上面。

using UnityEngine;
using System.Collections;

public class MouseOrbitImproved : MonoBehaviour {
	
	public Transform target;
	public float distance = 8.0f;
	public float xSpeed = 70.0f;
	public float ySpeed = 50.0f;
	
	public float yMinLimit = 0f;
	public float yMaxLimit = 90f;
	
	public float distanceMin = 8f;
	public float distanceMax = 15f;
	public float zoomSpeed=0.5f;
	
	private Rigidbody rigidbody;
	
	private float x = 0.0f;
	private float y = 0.0f;

	private float fx=0f;
	private float fy=0f;
	private float fDistance=0;
	
	// Use this for initialization
	void Start () 
	{
		Vector3 angles = transform.eulerAngles;
		x = angles.y;
		y = angles.x;
		fx = x;
		fy = y;
		
		rigidbody = GetComponent<Rigidbody>();
		
		// Make the rigid body not change rotation
		if (rigidbody != null)
		{
			rigidbody.freezeRotation = true;
		}
		UpdateRotaAndPos ();
		fDistance = distance;
	}

	void Update()
	{
		// If there are two touches on the device...
		if (Input.touchCount == 2) {
			// Store both touches.
			Touch touchZero = Input.GetTouch (0);
			Touch touchOne = Input.GetTouch (1);
			
			// Find the position in the previous frame of each touch.
			Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
			Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;
			
			// Find the magnitude of the vector (the distance) between the touches in each frame.
			float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
			float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;
			
			// Find the difference in the distances between each frame.
			float deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;
			fDistance = Mathf.Clamp ( distance+ deltaMagnitudeDiff * zoomSpeed , distanceMin, distanceMax);
		}
		distance = Mathf.Lerp (distance, fDistance, 0.25f);
	}

	void LateUpdate () 
	{
		if (Input.GetMouseButton(0)&&Input.touchCount<2)
		{
			if (target) {
				float dx = Input.GetAxis("Mouse X");
				float dy = Input.GetAxis("Mouse Y");
				if (Input.touchCount > 0)
				{
					dx = Input.touches[0].deltaPosition.x;
					dy = Input.touches[0].deltaPosition.y;
				}
				
				x += dx * xSpeed  * Time.deltaTime;//*distance
				y -= dy * ySpeed * Time.deltaTime;
				
				y = ClampAngle(y, yMinLimit, yMaxLimit);
			}
		}

		fx = Mathf.Lerp (fx, x, 0.2f);
		fy = Mathf.Lerp (fy, y, 0.2f);

		UpdateRotaAndPos ();
	}


	void UpdateRotaAndPos(){
		if (target) {
			Quaternion rotation = Quaternion.Euler(fy, fx, 0);
			Vector3 negDistance = new Vector3(0.0f, 0.0f, -distance);
			Vector3 position = rotation * negDistance + target.position;
			
			transform.rotation = rotation;
			transform.position = position;
		}
	}
	
	public static float ClampAngle(float angle, float min, float max)
	{
		if (angle < -360F)
			angle += 360F;
		if (angle > 360F)
			angle -= 360F;
		return Mathf.Clamp(angle, min, max);
	}
}