WaveEffect.cs

using UnityEngine;


#pragma warning disable 414

/*
 *
 * By: hww
 *
 */ 

[System.Serializable]
public class WaveModulator
{
	public enum Mode 
	{
		DISABLED,
		SQUARE,
		SINE
	}
	
	public Mode mode;           // Mode.SINE, Mode.SQUARE or nothing DISABLED
	public float speed = 1;     // modulation speed
	public float power = 1;	    // modulation power (amplitude)	
	public int time_on = 1;     // enabled time (Mode.SQUARE)
	public int time_off = 3;    // disable time (Mode.SQUARE)
	
	static float PI2 = 2.0f * Mathf.PI;
	
	public WaveModulator() {
		mode = Mode.SQUARE;	
	}
	
	public float Update (float time)
	{
		switch (mode)
		{
		case Mode.DISABLED:
			return 1;
		case Mode.SQUARE:
			
			int wave_number = Mathf.FloorToInt((time * speed) / PI2);
			int wave_phase = wave_number % (time_on + time_off);	
			if (wave_phase >= time_off)
				return power;
			else
				return 0;
		case Mode.SINE:
			return Mathf.Sin (time * speed) * power;
		}
		return 0;
	}
}

[System.Serializable]
public class WaveEffect
{
	public float speed = 12;	      // each character animation speed
	public float power = 2;		      // each character animation power (amplitude)
	public float delay = 5;		      // each character animation	delay between characters
	public WaveModulator modulator;       // LFO - low frequence oscilator 
	
	public WaveEffect () {
		modulator = new WaveModulator();	
	}
	
	/// <summary>
	/// Update the specified time and index.
	/// </summary>
	/// <param name="time">Usualy Time.time</param>
	/// <param name="index">
	/// Index per character. 
	///   Can be positive or negative. 
	///   It change dirrection of the effect
	///   It can be constant that make effect same for each character
	/// </param>

	public float Update (float time, float index)
	{
		float phase = delay * index;
		float ctime = time * speed - phase; 
		return Mathf.Sin (ctime) * power * modulator.Update(ctime);
	}
}