using System;
using UnityEngine;

[AddComponentMenu("Modifiers/Warps/Skew")]
public class MegaSkewWarp : MegaWarp
{
	public float amount;

	public bool doRegion;

	public float to;

	public float from;

	public float dir;

	public MegaAxis axis;

	private Matrix4x4 mat = default(Matrix4x4);

	private float amountOverLength;

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

	public override string GetIcon()
	{
		return "MegaSkew icon.png";
	}

	public override string GetHelpURL()
	{
		return "?page_id=2571";
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		p = tm.MultiplyPoint3x4(p);
		Vector3 a = p;
		float magnitude = p.magnitude;
		float t = Mathf.Exp((0f - totaldecay) * Mathf.Abs(magnitude));
		float num = p.y;
		if (doRegion)
		{
			if (p.y < from)
			{
				num = from;
			}
			else if (p.y > to)
			{
				num = to;
			}
		}
		p.x -= num * amountOverLength;
		p = Vector3.Lerp(a, p, t);
		return invtm.MultiplyPoint3x4(p);
	}

	public override bool Prepare(float decay)
	{
		tm = base.transform.worldToLocalMatrix;
		invtm = tm.inverse;
		if (from > 0f)
		{
			from = 0f;
		}
		if (to < 0f)
		{
			to = 0f;
		}
		mat = Matrix4x4.identity;
		switch (axis)
		{
		case MegaAxis.X:
			MegaMatrix.RotateZ(ref mat, (float)Math.PI / 2f);
			break;
		case MegaAxis.Y:
			MegaMatrix.RotateX(ref mat, -(float)Math.PI / 2f);
			break;
		}
		MegaMatrix.RotateY(ref mat, (float)Math.PI / 180f * dir);
		SetAxis(mat);
		float num = 0f;
		if (!doRegion)
		{
			switch (axis)
			{
			case MegaAxis.X:
				num = Width;
				break;
			case MegaAxis.Z:
				num = Height;
				break;
			case MegaAxis.Y:
				num = Length;
				break;
			}
		}
		else
		{
			num = to - from;
		}
		if (num == 0f)
		{
			num = 1E-06f;
		}
		amountOverLength = amount / num;
		totaldecay = Decay + decay;
		if (totaldecay < 0f)
		{
			totaldecay = 0f;
		}
		return true;
	}

	public override void ExtraGizmo()
	{
		if (doRegion)
		{
			DrawFromTo(axis, from, to);
		}
	}
}