Unity3D - How to control Light.Intensity without animation (script)

I have the following animation:

Note: Below image of animation control


How can I get the same result using a script? My intention is that the script has no "if".

Don't like this:

Code (CSharp):

1.  
2.         public float minIntensity;
3.         public float maxIntensity;
4.  
5.         public float intensityAmount;
6.  
7.         private Light light;
8.  
9.         void Awake(){
10.             light  = GetComponent<Light>();
11.         }
12.  
13.         void Update(){
14.  
15.              if (light.intensity > maxIntensity) {
16.                  light.intensity -= intensityAmount * Time.deltaTime;
17.              }
18.              else if (light.intensity < minIntensity) {
19.                 light.intensity += intensityAmount * Time.deltaTime;
20.              }
21.  
22.           }
23.  

I wonder if there is any possibility to do this using some native function ... like: (Math.Clamp, Math.Lerp, Quaternion.Slerp) without any condition as "if" in the code.

Thank you in advance.

 

http://docs.unity3d.com/ScriptReference/Mathf.PingPong.html

 

@LeftyRighty Sorry, But this function always starts from 0

 

Maybe use an animationCurve

light.intensity = curve.Evaluate(Time.time);

 

Use the PingPong value as your control variable in Mathf.Lerp

 

PingPong method always starts from 0. I need values between 4 and 7.

Code (CSharp):

1.  
2. public float minIntensity = 4;
3. public float maxIntensity = 7;

 

well, if pingpong goes between 0-1 you can multiply that value by 3 then add 4.

ie, use the pingpong value as a percentage value

 

I can not understand what you meant, you could give me an example, Please?

 

Code (csharp):

1.  
2.  
3. float value = Mathf.PingPong(Time.time, 1) * 3 +4;
4.  
5.  

 

Like a boss @JamesLeeNZ :

Code (CSharp):

1. light.intensity = Mathf.PingPong(Time.time * 2, 1) * 3 + 4;

Works perfectly! Thanks so much!

 

glad to be of help

 

What I was getting at, by the way, was this:

Code (csharp):

1. light.intensity = Mathf.Lerp (minIntensity, maxIntensity, Mathf.PingPong(Time.time * 2, 1) );

The advantage over JamesLeeNZ's is that it would allow you to easily change the min and max values in the inspector.

 

Nice too, @StarManta UP