Question Camera touch rotation Pokemon Go style

Hello everyone!

Recently I have been trying to get my camera to rotate the same way it does in Pokemon Go and by that I mean whenever the player does a circular touch gesture(like the below picture) the camera rotates that way too and if they reach back to the original point where they started, the rotation keeps going. Also the ability to rotate like this both to the right and the left is something I have yet to replicate.

Code (CSharp):

1.  if(Input.touchCount==1 && inputsPaused == false)
2.         {
3.  
4.  
5.             Touch firstTouch = Input.GetTouch(0);
6.  
7.  
8.  
9.             //if (firstTouch.deltaPosition.y > 0)
10.             //{
11.             //    if (firstTouch.deltaPosition.x < 0)
12.             //    {
13.             //        transform.eulerAngles += new Vector3(0, 0, -40f * Time.deltaTime);
14.             //        compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
15.             //    }
16.             //    else
17.             //         if (firstTouch.deltaPosition.x > 0)
18.             //    {
19.             //        transform.eulerAngles += new Vector3(0, 0, 40f * Time.deltaTime);
20.             //        compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
21.             //    }
22.  
23.             //}
24.             //else
25.             //    if (firstTouch.deltaPosition.y < 0)
26.             //{
27.             //    if (firstTouch.deltaPosition.x < 0)
28.             //    {
29.             //        transform.eulerAngles += new Vector3(0, 0, 40f * Time.deltaTime);
30.             //        compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
31.             //    }
32.             //    else
33.             //         if (firstTouch.deltaPosition.x > 0)
34.             //    {
35.             //        transform.eulerAngles += new Vector3(0, 0, -40f * Time.deltaTime);
36.             //        compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
37.             //    }
38.             //}
39.  
40.             if (firstTouch.position.y > 0)
41.             {
42.                
43.                     transform.eulerAngles += new Vector3(0, 0, -40f * Time.deltaTime);
44.                     compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
45.              
46.  
47.             }
48.             else
49.                    if (firstTouch.position.y < 0)
50.             {
51.                
52.                
53.                     transform.eulerAngles += new Vector3(0, 0, 40f * Time.deltaTime);
54.                     compas.Rotate(new Vector3(0, 0, -4f * Time.deltaTime));
55.                
56.              
57.             }
58.  
59.  
60.  
61.             text.text = "X: " + firstTouch.position.x + " Y: " + firstTouch.position.y;
62.  
63.  
64.  
65.             //if (Input.GetTouch(0).phase == TouchPhase.Began)
66.             //{
67.             //    startAngle = Mathf.Atan2(touchPos.y, touchPos.x) * Mathf.Rad2Deg;
68.             //    if (startAngle <= 0)
69.             //    {
70.             //        startAngle += 360;
71.             //    }
72.             //}
73.             //angle = Mathf.Atan2(touchPos.y, touchPos.x) * Mathf.Rad2Deg;
74.             //if (angle < 0)
75.             //    angle += 360;
76.             //distanceAngle = startAngle - endAngle;
77.             //angle -= distanceAngle;
78.             //if (angle < 0)
79.             //    angle += 360;
80.             //else if (angle > 360)
81.             //    angle -= 360;
82.             //if (Input.GetTouch(0).phase == TouchPhase.Ended)
83.             //{
84.             //    endAngle = angle;
85.             //}
86.  
87.             //transform.rotation = Quaternion.Euler(transform.rotation.x, transform.rotation.y, angle);
88.  
89.         }
90.  
91.      
92.  
93.  
94.  
95.  
96.  
97.  
98.  
99.     }

I have tried various code pieces but to no avail. I am trying to get my camera to rotate only on the Z axis, as I need my X rotation as 90* and Y as 0.

If anybody has a clue on how to do this I would appreciate it

 

Camera stuff is pretty tricky... you may wish to consider using Cinemachine from the Unity Package Manager.

There's even a dedicated forum: https://forum.unity.com/forums/cinemachine.136/

If you want to do it yourself, definitely get away from any use of the .eulerAngles property, especially additive uses. That will almost certainly lead to undesirable results. Here's why:

Notes on clamping camera rotation and NOT using .eulerAngles because of gimbal lock:

https://forum.unity.com/threads/implement-a-limit-in-camera-movement.1100038/#post-7082380
https://forum.unity.com/threads/implement-a-limit-in-camera-movement.1100038/#post-7083097

How to instantly see gimbal lock for yourself:

https://forum.unity.com/threads/confusing-bug.1165789/#post-7471441

All about Euler angles and rotations, by StarManta:

https://starmanta.gitbooks.io/unitytipsredux/content/second-question.html

You will always have better luck by:

1. setting the camera position (transform.position = ...)
2. telling the camera to look at another position (transform.LookAt( ...))

 

Thank you for taking the time to compile all this information! It has been very helpful, the last thing that I am stuck on now is figuring out how to keep rotating to the direction determined by the circular touch gesture

 

You need to keep a short list of the last n places that your touch has registered each frame. Every frame you're touching, throw out the oldest and add the newest. Then you can examine them when the touch ends, and extrapolate. Let's say that the last point is H, and the point before that is G. The next point in a line is H + (H-G). You can figure out the next point along a curve from F->G->H->? the same way.