1 public Transform target;
 2
 3
 4     public float minDistance = 1.5f;
 5     public float maxDistance = 10.0f;
 6
 7     public float yawSensitivity =30f;
 8     public float pinchSensitivity = 5.0f;
 9
10     public float smoothZoomSpeed = 30.0f;
11     public float smoothOrbitSpeed = 10.0f;
12
13     float distance = 5.0f;
14     float yaw = 0;
15     float pitch = 0;
16
17     float idealDistance = 0;
18
19     bool rotate;
20
21     public float IdealDistance
22     {
23         get { return idealDistance; }
24         set { idealDistance = Mathf.Clamp( value, minDistance, maxDistance ); }
25     }
26
27     public float Yaw
28     {
29         get { return yaw; }
30     }
31
32     void Start()
33     {
34         Vector3 angles = transform.eulerAngles;
35
36         distance = IdealDistance = 5f;
37         yaw =  angles.y;
38         pitch = 25;
39
40         UpdateCamera();
41     }
42
43
44     void Update()
45     {
46         if (Input.GetMouseButtonDown (1))
47             rotate = true;
48         if (Input.GetMouseButtonUp (1))
49             rotate = false;
50
51         if( rotate )
52         {
53             yaw += Input.GetAxis ("Mouse X") * yawSensitivity;
54             pitch -=  Input.GetAxis ("Mouse Y") *pinchSensitivity;
55         }
56
57         IdealDistance -= Mathf.Lerp (0, Input.GetAxis ("Mouse ScrollWheel") * smoothZoomSpeed, Time.deltaTime);
58         IdealDistance = Mathf.Clamp (IdealDistance, minDistance, maxDistance);
59     }
60
61     void LateUpdate()
62     {
63         UpdateCamera ();
64     }
65
66     void UpdateCamera()
67     {
68         distance = Mathf.Lerp (distance, IdealDistance, Time.deltaTime * smoothZoomSpeed);
69
70         Vector3 lookAtPos = target.position;
71         Quaternion rotaetAngle = Quaternion.Euler (pitch, yaw, 0);
72
73         Vector3 desiredPos = lookAtPos - rotaetAngle * new Vector3 (0, 0, distance);
74
75         transform.position = desiredPos;
76         transform.rotation = rotaetAngle;
77
78         transform.LookAt (target);
79     }
80
81     static float ClampAngle( float angle, float min, float max )
82     {
83         if( angle < -360 )
84             angle += 360;
85
86         if( angle > 360 )
87             angle -= 360;
88
89         return Mathf.Clamp( angle, min, max );
90     }