using UnityEngine;
using System.Collections;
using System.Collections.Generic;

//Coded by ninjapretzel
//Flicker behaviour
//Add to a GameObject to make its renderer 'flicker'
public class Flicker : MonoBehaviour {
	
	public bool animate = true;
	
	public float tickTime = .1f; 	//Time in seconds per 'tick' (.1 = .1sec full alpha, .1sec reduced alpha, .1sec full, etc)
	public float alphaScale = .3f;	//How transparent are the 'faded' ticks?
	
	float timeout = 0;				//timer to keep track of current time this tick.
	float fullAlpha = 1; 			//Keep track of full alpha. We will grab this info from the material on start.
	bool full = true;				//Flag to keep track of if we should use the full or reduced alpha
	
	void Start() {
		fullAlpha = renderer.material.color.a;
		timeout = 0;
		full = true;
	}
	
	void Update() {
		Color c = renderer.material.color;
		c.a = fullAlpha;
		
		//Is the effect animating?
		if (animate) { 
			//Accumulate time into the timer
			timeout += Time.deltaTime;
			
			//Process all ticks that would have happened over the deltaTime 
			//(incase of a delay, we don't want it to instantly flip for a few frames)
			while (timeout > tickTime) {
				timeout -= tickTime;
				full = !full;
				//Subtract the time for that tick, and flip the fade flag.
			}
			
			//If we are not full this frame, set the reduced alpha value.
			if (!full) { 
				c.a *= alphaScale;
			}
			
		}
		
		//This will apply the full alpha if we are not animating,
		//And then partial alpha half the time if we are.
		renderer.material.color = c;
	}
	
}