Unity3D Unity3D Flickering Light Tutorial 14
THIS IS C# scrip: GOOD 4 2D GAMES AND 3D GAMES !
Name c# script : FlickeringLight
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using UnityEngine;
using System.Collections;
[AddComponentMenu("Utilities/Flickering Light")]
public class FlickeringLight : MonoBehaviour
{
public float cycleDuration = 2f; // How long before looping back to the beginning of the curve
public int keysCount = 10; // The number of keys
public float startVal = 1f; // The value around which the intensity will be randomized
public float randMin = -1f, randMax = 1f; // The min and max of the curve
public float flickrIntensity = 1f; // The curve will be multiplied by that value and added to startVal
// You could use only the curve, but to change the light's behaviour you would need to
// Resample the keys. It involves Random calls, and can be expensive.
// By using intensity and startVal, you can modulate it at any time for no cost.
private AnimationCurve curve;
private IEnumerator Start ()
{
ResampleKeys();
while( Application.isPlaying )
{
float t = 0f;
float cycleInv = 1f / cycleDuration;
while( t < 1f )
{
light.intensity = startVal + curve.Evaluate( t ) * flickrIntensity;
yield return null;
t += Time.deltaTime * cycleInv;
}
}
}
// Can be called from outside if you want a different seed and new settings
public void ResampleKeys( float _startVal, float _randMin, float _randMax, float _intensity )
{
startVal = _startVal;
flickrIntensity = _intensity;
randMin = _randMin;
randMax = _randMax;
ResampleKeys();
}
// Can be called from outside if you want a different seed
public void ResampleKeys()
{
// Make sure there is at least 2 keys
keysCount = Mathf.Max( keysCount, 2 );
// Generate the keys randomly
Keyframe[] keys = new Keyframe[keysCount];
float inv = 1f / (keysCount-1);
for( int i = 0; i < keysCount; i++ )
keys[i] = new Keyframe( i * inv, Random.Range(randMin, randMax) );
// Make sure the first and last value matches to have a proper loop
float firstVal = keys[0].value;
float lastVal = keys[ keys.Length-1 ].value;
float middle = (firstVal + lastVal) * .5f;
keys[0].value = middle;
keys[ keys.Length-1 ].value = middle;
// Commit
curve = new AnimationCurve( keys );
}
}
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