MouseOrbit not working with touch drag

hi folks, I am trying to use the MouseOrbit script, it works fine if i use my mouse (click and drag to orbit) but i got this touchscreen and when i touch and drag on screen it does nothing. its a "single touch" screen, im using the touch to emulate mouse click, it works fine in other places such as clicking a button etc. any idea how to fix this problem?
btw i tried another script by cyb3rmaniak from this thread
http://forum.unity3d.com/threads/19846-Smooth-Camera-Orbit-Script-on-mouse-click-%28help%29
and it works with touch drag but it resets the cam position if i retouch the screen.

Code (csharp):

1. var target : Transform;
2. var distance = 10.0;
3.  
4. var xSpeed = 250.0;
5. var ySpeed = 120.0;
6.  
7. var yMinLimit = -20;
8. var yMaxLimit = 80;
9.  
10. private var x = 0.0;
11. private var y = 0.0;
12.  
13. @script AddComponentMenu("Camera-Control/Mouse Orbit")
14.  
15. function Start () {
16.     var angles = transform.eulerAngles;
17.     x = angles.y;
18.     y = angles.x;
19.  
20.     // Make the rigid body not change rotation
21.     if (rigidbody)
22.         rigidbody.freezeRotation = true;
23. }
24.  
25. function LateUpdate () {
26.  
27.             if(Input.GetMouseButton(0)) { //Mouse button is down
28.                 //Change the angles by the mouse movement
29.                 x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
30.                 y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
31.         y = ClampAngle(y, yMinLimit, yMaxLimit);
32.                    
33.         var rotation = Quaternion.Euler(y, x, 0);
34.         var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
35.        
36.         transform.rotation = rotation;
37.         transform.position = position;
38.        
39.                     //Zooming with mouse
40.     distance += Input.GetAxis("Mouse ScrollWheel")*distance;
41.     }
42.    
43.  
44. }
45.  
46. static function ClampAngle (angle : float, min : float, max : float) {
47.     if (angle < -360)
48.         angle += 360;
49.     if (angle > 360)
50.         angle -= 360;
51.     return Mathf.Clamp (angle, min, max);
52. }

 

I got this idea from another post and wrote the following script, it partially solved my problem, the touch drag works but now i have another problem, if i take my finger off or even stop dragging the mouse (button down) and then on the next touch or click, it doesnt read it as a neutral point but instead the moment you do the next touch or click it starts to orbit relative to the first click/touch that you did the moment simulation started. any suggestions?

Code (csharp):

1. var target : Transform;
2.  
3. var distance = 10.0;
4.  
5. var xSpeed = 250.0;
6.  
7. var ySpeed = 120.0;
8.  
9. var startX;
10.  
11. var startY;
12.  
13. var yMinLimit = -20;
14.  
15. var yMaxLimit = 80;
16.  
17. private var x = 0.0;
18.  
19. private var y = 0.0;
20.  
21.  
22.  
23. @script AddComponentMenu("Camera-Control/Mouse Orbit")
24.  
25.  
26.  
27. function Start () {
28.  
29.     startX = Input.mousePosition.x;
30.  
31.     startY = Input.mousePosition.y;
32.  
33.     var angles = transform.eulerAngles;
34.  
35.     x = angles.y;
36.  
37.     y = angles.x;
38.  
39.  
40.  
41.     // Make the rigid body not change rotation
42.  
43.     if (rigidbody)
44.  
45.         rigidbody.freezeRotation = true;
46.  
47. }
48.  
49.  
50.  
51. function LateUpdate () {
52.  
53.  
54.  
55.          if(Input.GetMouseButton(0)) { //Mouse button is down
56.  
57.                  
58.  
59.             var currentX = Input.mousePosition.x;
60.  
61.             var differenceX = currentX-startX;
62.  
63.             var currentY = Input.mousePosition.y;
64.  
65.             var differenceY = currentY-startY;
66.  
67.                 x +=  differenceX*xSpeed*Time.deltaTime*0.01;
68.  
69.                 y -=  differenceY*ySpeed*Time.deltaTime*0.01;
70.  
71.                      
72.  
73.         y = ClampAngle(y, yMinLimit, yMaxLimit);
74.  
75.                    
76.  
77.         var rotation = Quaternion.Euler(y, x, 0);
78.  
79.         var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
80.  
81.        
82.  
83.         transform.rotation = rotation;
84.  
85.         transform.position = position;
86.  
87.        
88.  
89.                     //Zooming with mouse
90.  
91.     distance += Input.GetAxis("Mouse ScrollWheel")*distance;
92.  
93.     }
94.  
95. }
96.  
97.  
98.  
99. static function ClampAngle (angle : float, min : float, max : float) {
100.  
101.     if (angle < -360)
102.  
103.         angle += 360;
104.  
105.     if (angle > 360)
106.  
107.         angle -= 360;
108.  
109.     return Mathf.Clamp (angle, min, max);
110.  
111. }

 

adding the following code solved the problem for the mouse but not with the touch. for touch i have to touch twice in the new places to initiate orbiting from that point... weird

Code (csharp):

1.  else if (Input.GetMouseButtonUp) {
2.  
3.     startX = Input.mousePosition.x;
4.  
5.     startY = Input.mousePosition.y;
6.  
7.     }

p.s. why is that copy pasting code add extra blank line in between two lines.