using System;
using UnityEngine;

[AddComponentMenu("Modifiers/Warps/Bend")]
public class MegaBendWarp : MegaWarp
{
	public float angle;

	public float dir;

	public MegaAxis axis;

	public bool doRegion;

	public float from;

	public float to;

	private Matrix4x4 mat = default(Matrix4x4);

	private Matrix4x4 tmAbove = default(Matrix4x4);

	private Matrix4x4 tmBelow = default(Matrix4x4);

	private float r;

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

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

	public override string GetHelpURL()
	{
		return "?page_id=2551";
	}

	private void CalcR(MegaAxis axis, float ang)
	{
		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 (Mathf.Abs(ang) < 1E-06f)
		{
			r = 0f;
		}
		else
		{
			r = num / ang;
		}
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		if (r == 0f && !doRegion)
		{
			return p;
		}
		p = tm.MultiplyPoint3x4(p);
		if (doRegion)
		{
			if (p.y <= from)
			{
				return invtm.MultiplyPoint3x4(tmBelow.MultiplyPoint3x4(p));
			}
			if (p.y >= to)
			{
				return invtm.MultiplyPoint3x4(tmAbove.MultiplyPoint3x4(p));
			}
		}
		if (r == 0f)
		{
			return invtm.MultiplyPoint3x4(p);
		}
		Vector3 a = p;
		float magnitude = p.magnitude;
		float t = Mathf.Exp((0f - totaldecay) * Mathf.Abs(magnitude));
		float x = p.x;
		float y = p.y;
		float num = y / r;
		float num2 = Mathf.Cos((float)Math.PI - num);
		float num3 = Mathf.Sin((float)Math.PI - num);
		float x2 = r * num2 + r - x * num2;
		p.x = x2;
		float y2 = r * num3 - x * num3;
		p.y = y2;
		p = Vector3.Lerp(a, p, t);
		p = invtm.MultiplyPoint3x4(p);
		return p;
	}

	private void Calc()
	{
		tm = base.transform.worldToLocalMatrix;
		invtm = tm.inverse;
		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);
		CalcR(axis, (float)Math.PI / 180f * (0f - angle));
		if (doRegion)
		{
			doRegion = false;
			float num = to - from;
			float num2;
			float num3;
			if (num == 0f)
			{
				num2 = (num3 = 1f);
			}
			else
			{
				num2 = to / num;
				num3 = from / num;
			}
			tmAbove = Matrix4x4.identity;
			MegaMatrix.Translate(ref tmAbove, 0f, 0f - to, 0f);
			MegaMatrix.RotateZ(ref tmAbove, -(float)Math.PI / 180f * angle * num2);
			MegaMatrix.Translate(ref tmAbove, 0f, to, 0f);
			Vector3 vector = new Vector3(0f, to, 0f);
			MegaMatrix.Translate(ref tmAbove, tm.MultiplyPoint3x4(Map(0, invtm.MultiplyPoint3x4(vector))) - vector);
			tmBelow = Matrix4x4.identity;
			MegaMatrix.Translate(ref tmBelow, 0f, 0f - from, 0f);
			MegaMatrix.RotateZ(ref tmBelow, -(float)Math.PI / 180f * angle * num3);
			MegaMatrix.Translate(ref tmBelow, 0f, from, 0f);
			vector = new Vector3(0f, from, 0f);
			MegaMatrix.Translate(ref tmBelow, tm.MultiplyPoint3x4(Map(0, invtm.MultiplyPoint3x4(vector))) - vector);
			doRegion = true;
		}
	}

	public override bool Prepare(float decay)
	{
		Calc();
		totaldecay = Decay + decay;
		if (totaldecay < 0f)
		{
			totaldecay = 0f;
		}
		return true;
	}

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