Rotate object back and forth x degrees

I have an object as child of another that casts and draw rays in front of it in a chape of a cone (2D)
I want to rotate the children (vision cone) 45 degrees to the left and right to represent his vision.

The thing is....when rotating counter clockwise, the numbers increase making it impossible to control the rotation.

For better understanding i will post my code:

Code (csharp):

1.  
2. public void RotateVision()
3.   {
4.   if (rotateClockWise)
5.   {
6.   transform.Rotate(new Vector3(0, rotationAmount, 0));
7.   if (transform.rotation.eulerAngles.y >= 45)
8.   {
9.   rotateClockWise = false;
10.   }
11.   }
12.   else
13.   {
14.   transform.Rotate(new Vector3(0, -rotationAmount, 0));
15.   if (transform.rotation.eulerAngles.y <= 315)
16.   {
17.   rotateClockWise = true;
18.   }
19.   }
20.   }
21.  
22.  

 

First, refer to this post, it makes your code more readable:
http://forum.unity3d.com/threads/using-code-tags-properly.143875/

As for the answer, instead of allow the quaternion in the transform to store the state of rotation (which can come back with wildly different values as it loops around 360 degrees). Instead have a field/variable in your script that maintains the state, and you just update your rotation value with that.

 

Try this.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class Rotate : MonoBehaviour {
5.     [SerializeField] protected Vector3 m_from = new Vector3(0.0F, 45.0F, 0.0F);
6.     [SerializeField] protected Vector3 m_to = new Vector3(0.0F, -45.0F, 0.0F);
7.     [SerializeField] protected float m_frequency = 1.0F;
8.  
9.     protected virtual void Update() {
10.         Quaternion from = Quaternion.Euler(this.m_from);
11.         Quaternion to = Quaternion.Euler(this.m_to);
12.  
13.         float lerp = 0.5F * (1.0F + Mathf.Sin(Mathf.PI * Time.realtimeSinceStartup * this.m_frequency));
14.         this.transform.localRotation = Quaternion.Lerp(from, to, lerp);
15.     }
16. }

 

Thank you. It works!

 

Glad I could help

 

can you explain the formula that you used after float lerp equations ı mean like this part float lerp = 0.5F * (1.0F + Mathf.Sin(Mathf.PI * Time.realtimeSinceStartup * this.m_frequency));

 

Thanks Polymorphik works great!

 

Thanks Guys works perfectly!

 

Currently this rotates, stops and rotates back.
Can you please help provide the solution for rotate, stop (x time) rotate back?