Rotate Character 90 Degrees

I'm trying to make my character rotate 90 degrees each time a player presses an arrow key, but I'm having trouble with the rotation. Currently, the player moves extremely quickly between -90, 90, and 180. My code is below. if anyone can help me understand why this approach isn't working and what would be a better approach, I'd greatly appreciate it.

Code (CSharp):

1. public class PlayerMovement : MonoBehaviour {
2.  
3.     void Update()
4.     {
5.         float h = Input.GetAxisRaw ("Horizontal");
6.  
7.         if (h != 0)
8.         {
9.             Turn ();  
10.         }
11.     }
12.  
13.     void Turn ()
14.     {
15.         Vector3 angles = transform.eulerAngles;
16.         float y = angles.y + 90;
17.         transform.rotation = Quaternion.AngleAxis(y, Vector3.up);
18.     }
19. }

 

Try using GetKeyDown or GetButtonDown instead of GetAxis. That will only return true for the first frame its 'down'.

Also, I'd recommend that you not use euler angles that way. You can do:

Code (csharp):

1. transform.rotation *= Quaternion.Euler(0,90,0);

 

Thanks so much for your help! The problem was indeed caused by the GetAxisRaw.