Rotating object with touch.

I have already script for rotating object with touch but it don't works how i want. I know in what is problem but i can't solve it. How can i "reset" cursor position to 0 on place where i touched? Because when i tap on one place and then on another, cursor does line between these places makes my rotation hmm... strange and fast. But when i hold one place and move finger everything is ok, until i want to tap on another place.
Sorry for bad english.

 

Are you rotating a 2d or 3d object? What type of rotation are you doing?

 

3D

 

Any Ideas?

 

Probably need to show some code, because I don't know how you're doing your rotation. I've done rotation with 3D models and I'm not experiencing your problem.

 

if (Input.GetMouseButton (0)) {
transform.Rotate (new Vector3 (Input.GetAxis ("Mouse Y") * 1, Input.GetAxis ("Mouse X") * -1, 0) * Time.deltaTime * rotation_speed, Space.World);
}

It works correctly only on pc but on android it instant changes position.

 

Please, see Touch.Phase documentation: https://docs.unity3d.com/ScriptReference/Touch-phase.html

You have began, moved, and ended touch phases to rotate mesh.

 

As @IsGreen posted. You'll want to look into the touch system. Also keep in mind you may want to disable multitouch if you don't need it, else you'll have to account for it as well.

https://docs.unity3d.com/ScriptReference/Touch-deltaPosition.html

You can utilize touch deltaPosition to help with calculating your rotation.

 

It's exactly what i need, but i don't know what to do on start.

Should i do something like:
case TouchPhase.Moved:
transform.Rotate (new Vector3 (touch.position.y, touch.position.x, 0) * Time.deltaTime, Space.World);
or
case TouchPhase.Began:
startRot = new Vector3 (touch.position.y, touch.position.x, 0);

case TouchPhase.Moved:
moveRot = moveRot - startRot;
transform.Rotate (moveRot);
I don't know if it's bad or i don't know where i should put it in code.

or
try something with raycasts