Why are the physics different between the editor and device (iOS)?

Questions & Answers
1

I have noticed a bit of a difference between the physics in the editor and the physics in the iOS device. Here is the code I am using to apply a force to a ball so that it moves in the direction of the touch:

    void FixedUpdate()
 {
 if (Input.touchCount > 0)
 {
 OnTap(Input.touches[Input.touchCount - 1].position); 
 }
 if (Input.GetButton("Fire1") == true)
 {
 OnTap(Input.mousePosition); 
 }
 }
 
 void OnTap(Vector2 pt)
 {
 Ray ray = Camera.main.ScreenPointToRay(pt);
 RaycastHit hit;
 if (Physics.Raycast(ray, out hit) )
 {
   Vector3 kForce = KickForce(hit.point); // calculate the force and kick!
   rigidbody.AddForce(kForce * forceMultiplier);//, ForceMode.Acceleration);
 }
 }
 
 Vector3 KickForce(Vector3 dest)
 {
   Vector3 dir = dest - transform.position;  // get target direction
 dir.y = 0; // Zero-ize the vertical aspect
    return  dir.normalized * rigidbody.mass;
 }

The ball moves much faster on the device as if FixedUpdate() is being called more often than in the editor. Does anyone know why this is happening?

2

So your problem is, on the device, the code is running once for the touch and the touch is also triggering your Fire1 iteration. I suggest an else in front of your Fire1 test…