Making a FPV script for mobile

Hi!
I've watched this tutorial on Youtube,

and I want to make a script that takes mouse inputs and rotates the camera and player according to the mouse's position. My problem is that when I run the script from the tutorial in a mobile game I can't drag to change the rotation, like the upper left corner always give the same rotation for the camera and player. I want it so I can drag to change the position wherever on the mobile screen I am. Like in Minecraft PE
Here's my code so far:

Code (CSharp):

1.     void Update()
2.     {
3.         mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
4.         mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;
5.  
6.         xRotation -= mouseY;
7.         xRotation = Mathf.Clamp(xRotation, -90f, 90f);
8.  
9.         transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
10.         playerBody.Rotate(Vector3.up*mouseX);
11.     }

Sorry for the bad explination.

 

You need to track your own notion of "heading," probably in a float variable.

Then when the finger touches sweep left/right, you would scale them appropriately for your screen pixel width and your camera view frustum, and (here is the key part), you would add that sweep offset to the heading, then use the heading to turn the camera.

Screen width in pixels is given by

Screen.width

Camera frustum height in degrees is going to be your

camera.fieldOfView * 2

, and you would need to multiply it by the

Screen.width

, then divide it by the

Screen.height

in order to calculate frustum width in degrees.

When the finger goes down, mark the position so that the heading doesn't jerk, then on subsequent frames that the finger is down, subtract the new position from the previous one.

 

Thanks! I'll try it and reply if I need any more help