Rotate Turret towards touch point

in

 

Calculate the angle of the vector between the pivot and the touch point. Check out http://docs.unity3d.com/ScriptReference/Transform.Rotate.html

 

I think you could use the lookAt function http://docs.unity3d.com/ScriptReference/Transform.LookAt.html

 

I dug up an old prototype I made. Dumping the code. Hope it helps.

The tracking is a loop contained in a co-routine. In the AngleToPlayer function I correct the angle by 90 degrees. This is because there was a miscommunication with my artist and I was too lazy to rotate the sprites. You might not need this.

I don't know if this is the most elegant way though, it's from my second or third Unity game.

Code (CSharp):

1.     IEnumerator TrackPlayer()
2.     {
3.         isTracking = true;
4.         float rotateSpeed = 1f;
5.  
6.         while(true) {
7.  
8.             // Rotate
9.             float targetHeading = AngleToPlayer();
10.  
11.             Quaternion q = Quaternion.AngleAxis(targetHeading, Vector3.forward);
12.             transform.rotation = Quaternion.Slerp(transform.rotation, q, Time.deltaTime * rotateSpeed);
13.  
14.             yield return 0;
15.         }
16.     }
17.  
18. // -------
19.  
20.     float AngleToPlayer()
21.     {
22.         Vector3 p2 = GameManager.player.transform.position;
23.         Vector3 p1 = transform.position;
24.         return Mathf.Atan2(p2.y-p1.y, p2.x-p1.x)*180 / Mathf.PI - 90;
25.     }