Resolved How do I make touch to behave similarly to mouse in my ClickToDrag acript?

Hi,

I have a script that controls the rotation of a plane. Click to drag and the drag decides the rotation. Keeping it level is the target of this script so as the ball does not fall off. I have written below script for this to work:

Code (CSharp):

1.  public float rotSpeed = 20;
2.     float zDeg;
3.     float xDeg;
4.     Quaternion fromRotation;
5.     Quaternion toRotation;
6.  
7.     void Start()
8.     {
9.        
10.     }
11.  
12.     void Update()
13.     {
14.         if (Input.GetMouseButton(0))
15.         {
16.             zDeg += Input.GetAxis("Mouse X") * rotSpeed;        // I had to add Mouse X to the input manager for this to work, use mouse movement only and remove gravity etc and other settings
17.             xDeg -= Input.GetAxis("Mouse Y") * rotSpeed;
18.  
19.             zDeg = Mathf.Clamp(zDeg, -40f, 40f);
20.             xDeg = Mathf.Clamp(xDeg, -40f, 40f);
21.  
22.             fromRotation = transform.rotation;
23.             toRotation = Quaternion.Euler(xDeg, 0, zDeg);       // no wwanting to rotate the table around y-axis, so setting 0
24.             transform.rotation = Quaternion.Lerp(fromRotation, toRotation, Time.deltaTime * 5.0f);
25.         }
26.  
27.     }

It works great on mouse and is easy to control as well. But when I built for mobile the behavior is very different.

At times, when I touch the screen the plane will jump to an extreme starting position causing the ball on it to fall off. Looks like depending on where I touch the plane will take that as its starting position. Can I ensure that does not happen?

Thanks

 

Do you use this for mobile, or do you actually replace mouse inputs with touch inputs? I would recommend actually using the provided Touch interface instead of GetAxis(Mouse). Then you have access to all finger coordinates and can determine a delta between the current and last position to get your zDeg and xDeg.

 

Look up Input.TouchPhase.Moved: https://docs.unity3d.com/ScriptReference/TouchPhase.Moved.html

 

Thank you for letting me know about mouse not same as touch

I simply re-wrote my above script with touch to make it work as expected on mobile

Code (CSharp):

1. if (Input.touchCount == 1)
2.         {
3.             Touch touch = Input.GetTouch(0);
4.             if (touch.phase == TouchPhase.Moved)
5.             {
6.                 zDeg += touch.deltaPosition.x * rotSpeed;
7.                 xDeg -= touch.deltaPosition.y * rotSpeed;
8.  
9.                 zDeg = Mathf.Clamp(zDeg, -40f, 40f);
10.                 xDeg = Mathf.Clamp(xDeg, -40f, 40f);
11.  
12.                 fromRotation = transform.rotation;
13.                 toRotation = Quaternion.Euler(xDeg, 0, zDeg);       // no wwanting to rotate the table around y-axis, so setting 0
14.                 transform.rotation = Quaternion.Lerp(fromRotation, toRotation, Time.deltaTime * 5.0f);
15.             }
16.         }