using System;
using UnityEngine;

[AddComponentMenu("Modifiers/Page Flip")]
public class MegaPageFlip : MegaModifier
{
	public bool animT;

	public bool autoMode = true;

	public bool lockRho = true;

	public bool lockTheta = true;

	public float timeStep = 0.01f;

	public float rho;

	public float theta;

	public float deltaT;

	public float kT = 1f;

	public float turn;

	public float ap1 = -15f;

	public float ap2 = -2.5f;

	public float ap3 = -3.5f;

	public bool flipx = true;

	private Vector3 apex = new Vector3(0f, 0f, -3f);

	private Vector3 _cornerP;

	private Vector3 _pageOrigin;

	private float fx = 1f;

	public void calcAuto(float t)
	{
		float num = (float)Math.PI / 2f;
		if (t == 0f)
		{
			rho = 0f;
			theta = num;
			apex.z = ap1;
		}
		else if (t <= 0.15f)
		{
			float f = t / 0.15f;
			float ft = Mathf.Sin((float)Math.PI * Mathf.Pow(f, 0.05f) / 2f);
			float ft2 = Mathf.Sin((float)Math.PI * Mathf.Pow(f, 0.5f) / 2f);
			rho = t * 180f;
			theta = funcLinear(ft, (float)Math.PI / 2f, (float)Math.PI * 2f / 45f);
			apex.z = funcLinear(ft2, ap1, ap2);
		}
		else if (t <= 0.4f)
		{
			float f = (t - 0.15f) / 0.25f;
			rho = t * 180f;
			theta = funcLinear(f, (float)Math.PI * 2f / 45f, (float)Math.PI / 30f);
			apex.z = funcLinear(f, ap2, ap3);
		}
		else if (t <= 1f)
		{
			float f = (t - 0.4f) / 0.6f;
			rho = t * 180f;
			float ft = Mathf.Sin((float)Math.PI * Mathf.Pow(f, 10f) / 2f);
			float ft2 = Mathf.Sin((float)Math.PI * Mathf.Pow(f, 2f) / 2f);
			theta = funcLinear(ft, (float)Math.PI / 30f, (float)Math.PI / 2f);
			apex.z = funcLinear(ft2, ap3, ap1);
		}
	}

	public float calcTheta(float _rho)
	{
		int num = 0;
		float num2 = 1f;
		float num3 = 0.05f;
		float num4 = (float)Math.PI / 2f;
		float num5 = (num2 - num3) * num4;
		float num6 = _rho / 180f;
		if (num6 < 0.25f)
		{
			num = (int)(num6 / 0.25f);
		}
		else if (num6 < 0.5f)
		{
			num = 1;
		}
		else if (num6 <= 1f)
		{
			num = (int)((1f - num6) * 0.5f);
		}
		return num4 - (float)num * num5;
	}

	public float calcTheta2(float t)
	{
		float num = 0.1f;
		float num2 = (float)Math.PI / 4f;
		float num3 = Mathf.Abs(1f - t * 2f);
		return num * num2 + num3 * num2;
	}

	public Vector3 curlTurn(Vector3 p)
	{
		float num = Mathf.Sqrt(p.x * p.x + Mathf.Pow(p.z - apex.z, 2f));
		float num2 = num * Mathf.Sin(theta);
		float f = Mathf.Asin(p.x / num) / Mathf.Sin(theta);
		p.x = num2 * Mathf.Sin(f);
		p.z = num + apex.z - num2 * (1f - Mathf.Cos(f)) * Mathf.Sin(theta);
		p.y = num2 * (1f - Mathf.Cos(f)) * Mathf.Cos(theta);
		return p;
	}

	public float funcLinear(float ft, float f0, float f1)
	{
		return f0 + (f1 - f0) * ft;
	}

	public float funcQuad(float ft, float f0, float f1, float p)
	{
		return f0 + (f1 - f0) * Mathf.Pow(ft, p);
	}

	public override string ModName()
	{
		return "PageFlip";
	}

	public override string GetHelpURL()
	{
		return "?page_id=271";
	}

	public Vector3 flatTurn1(Vector3 p)
	{
		float x = p.x;
		p.x = Mathf.Cos(rho * ((float)Math.PI / 180f)) * x;
		p.y = Mathf.Sin(rho * ((float)Math.PI / 180f)) * (0f - x);
		return p;
	}

	public Vector3 rotpage(Vector3 p)
	{
		float x = p.x;
		float y = p.y;
		p.x = Mathf.Cos(rho * ((float)Math.PI / 180f)) * x + Mathf.Sin(rho * ((float)Math.PI / 180f)) * y;
		p.y = Mathf.Sin(rho * ((float)Math.PI / 180f)) * (0f - x) + Mathf.Cos(rho * ((float)Math.PI / 180f)) * y;
		return p;
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		p = tm.MultiplyPoint3x4(p);
		p = curlTurn(p);
		p.x *= fx;
		p = rotpage(p);
		p.x *= fx;
		return invtm.MultiplyPoint3x4(p);
	}

	public override bool ModLateUpdate(MegaModContext mc)
	{
		return Prepare(mc);
	}

	public override bool Prepare(MegaModContext mc)
	{
		if (flipx)
		{
			fx = -1f;
		}
		else
		{
			fx = 1f;
		}
		theta = (float)Math.PI / 12f;
		if (turn < 0f)
		{
			turn = 0f;
		}
		if (turn > 100f)
		{
			turn = 100f;
		}
		deltaT = turn / 100f;
		if (animT)
		{
			deltaT = kT * Time.time % 1f;
		}
		if (autoMode)
		{
			calcAuto(deltaT);
		}
		return true;
	}
}