using System;
using UnityEngine;

[AddComponentMenu("Modifiers/Warps/Waving")]
public class MegaWavingWarp : MegaWarp
{
	public float amp = 0.01f;

	public float flex = 1f;

	public float wave = 1f;

	public float phase;

	public bool animate;

	public float Speed = 1f;

	public MegaAxis waveaxis;

	private float time;

	private float dy;

	private int ix;

	private int iz = 2;

	private float t;

	public override string WarpName()
	{
		return "Waving";
	}

	public override string GetHelpURL()
	{
		return "?page_id=308";
	}

	public static float WaveFunc(float radius, float t, float amp, float waveLen, float phase, float decay)
	{
		float f = (float)Math.PI * 2f * (radius / waveLen + phase);
		return amp * Mathf.Sin(f) * Mathf.Exp((0f - decay) * Mathf.Abs(radius));
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		p = tm.MultiplyPoint3x4(p);
		float num = Mathf.Abs(2f * p[iz]);
		num *= num;
		p[ix] += flex * WaveFunc(p[iz], time, amp * num, wave, phase, totaldecay);
		return invtm.MultiplyPoint3x4(p);
	}

	private void Update()
	{
		if (animate)
		{
			float num = Time.deltaTime;
			if (num == 0f)
			{
				num = 0.01f;
			}
			t += num * Speed;
			phase = t;
		}
	}

	public override bool Prepare(float decay)
	{
		tm = base.transform.worldToLocalMatrix;
		invtm = tm.inverse;
		if (wave == 0f)
		{
			wave = 1E-06f;
		}
		dy = Decay / 1000f;
		totaldecay = dy + decay;
		if (totaldecay < 0f)
		{
			totaldecay = 0f;
		}
		switch (waveaxis)
		{
		case MegaAxis.X:
			ix = 0;
			iz = 2;
			break;
		case MegaAxis.Y:
			ix = 1;
			iz = 2;
			break;
		case MegaAxis.Z:
			ix = 2;
			iz = 0;
			break;
		}
		return true;
	}
}