Simple solution to rotate an object with touch/mouse drag without using OnMouseDrag()

Unity Engine
1

Hello all,

I have those lines of code:

   void Update()
    {
        if (Input.GetMouseButton(0))
        {
            posDelta = Input.mousePosition - mousePrevPos;

            target.Rotate(transform.up, -Vector3.Dot(posDelta, Camera.main.transform.right) / 5f, Space.World);
            target.Rotate(Camera.main.transform.right, Vector3.Dot(posDelta, Camera.main.transform.up) / 5f, Space.World);
           
        }
        mousePrevPos = Input.mousePosition;
    }

They work flawless in the editor, but as soon as I build for iOS it shows weird behavior.
Every time you release your finger from screen and put it back on, the object to rotate jumps back to its original rotation.

I can´t explain why, because like I said, it works in Unity.
Could anybody help me out on this “little” problem?
Thanks in advance!

2

Not sure if it’s actually related, and i cant explain why it works in Unity but not on iOS, but you could try using Input.GetAxis(“Mouse X”) (or Y) to get the current mouse input on that axis. There is also a Input.GetTouch, which is probably more fit for an iOS build. A “Touch” struct seemingly also directly features a deltaPosition by default.

Hope this helps at all.

3

Hey hey,

i will give it a try! Thanks a lot!

4

But touch means touching the Screen! Or you mean for IPhone?