using System;
using UnityEngine;

[AddComponentMenu("Modifiers/Attractor Shape")]
public class MegaAttractorShape : MegaModifier
{
	public MegaShape shape;

	public int curve;

	public MegaAttractType attractType;

	public float distance;

	public float rotate;

	public float force;

	public float slide;

	public AnimationCurve crv = new AnimationCurve(new Keyframe(0f, 0f), new Keyframe(1f, 1f));

	public int itercount = 4;

	private int k;

	private Vector3 tangent;

	private float alpha;

	private Vector3 delta;

	private Vector3 nvp;

	private Vector3 dir = Vector3.zero;

	private Matrix4x4 rottm = Matrix4x4.identity;

	private float slidealpha;

	private Matrix4x4 swtm;

	private Matrix4x4 swltm;

	private Matrix4x4 lwtm;

	private Matrix4x4 wltm;

	public float limit = 1f;

	private float limit2;

	private Vector3 shapepos;

	public bool flat = true;

	public bool splinechanged = true;

	private float positiveInfinity;

	private float num2;

	public Vector3[] points;

	private Vector3 tp = Vector3.zero;

	private Vector3 qc = Vector3.zero;

	public override string ModName()
	{
		return "Attractor Shape";
	}

	public override string GetHelpURL()
	{
		return "?page_id=338";
	}

	public Vector3 FindNearestPointWorld(Vector3 p, int iterations, ref float alpha)
	{
		return swtm.MultiplyPoint3x4(FindNearestPoint(swltm.MultiplyPoint3x4(p), iterations, ref alpha));
	}

	private void Start()
	{
		PrepareShape();
	}

	private void PrepareShape()
	{
		if (points == null || points.Length == 0)
		{
			points = new Vector3[101];
		}
		int num = 0;
		int num2 = 0;
		for (float num3 = 0f; num3 <= 1f; num3 += 0.01f)
		{
			points[num2++] = shape.splines[curve].Interpolate(num3, true, ref num);
		}
	}

	private void Find(Vector3 p)
	{
		positiveInfinity = float.PositiveInfinity;
		num2 = 0f;
		for (int i = 0; i < 101; i++)
		{
			float num = (float)i / 100f;
			float sqrMagnitude = (points[i] - p).sqrMagnitude;
			if (positiveInfinity > sqrMagnitude)
			{
				positiveInfinity = sqrMagnitude;
				num2 = num;
			}
		}
	}

	public Vector3 FindNearestPoint(Vector3 p, int iterations, ref float alpha)
	{
		int num = 0;
		Find(p);
		MegaSpline megaSpline = shape.splines[curve];
		for (int i = 0; i < itercount; i++)
		{
			float num2 = 0.01f * Mathf.Pow(10f, 0f - (float)i);
			float num3 = num2 * 0.1f;
			for (float num4 = Mathf.Clamp01(this.num2 - num2); num4 <= Mathf.Clamp01(this.num2 + num2); num4 += num3)
			{
				float sqrMagnitude = (megaSpline.Interpolate(num4, true, ref num) - p).sqrMagnitude;
				if (positiveInfinity > sqrMagnitude)
				{
					positiveInfinity = sqrMagnitude;
					this.num2 = num4;
				}
			}
		}
		alpha = this.num2;
		return shape.InterpCurve3D(curve, this.num2, true);
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		p = tm.MultiplyPoint3x4(p);
		Vector3 vector = lwtm.MultiplyPoint3x4(p);
		qc.x = vector.x - shapepos.x;
		qc.y = vector.y - shapepos.y;
		qc.z = vector.z - shapepos.z;
		if (qc.sqrMagnitude < limit2)
		{
			Vector3 point = FindNearestPointWorld(vector, itercount, ref alpha);
			if (attractType == MegaAttractType.Repulse)
			{
				delta.x = vector.x - point.x;
				delta.y = vector.y - point.y;
				delta.z = vector.z - point.z;
			}
			else
			{
				delta.x = point.x - vector.x;
				delta.y = point.y - vector.y;
				delta.z = point.z - vector.z;
			}
			float magnitude = delta.magnitude;
			if (magnitude < distance)
			{
				float num = distance - magnitude;
				float time = num / distance;
				float num2 = crv.Evaluate(time);
				if (attractType == MegaAttractType.Attract || attractType == MegaAttractType.Repulse)
				{
					Vector3 vector2 = delta.normalized * num * num2 * force;
					if (attractType == MegaAttractType.Attract)
					{
						if (vector2.magnitude <= magnitude)
						{
							nvp = wltm.MultiplyPoint3x4(vector + vector2);
						}
						else
						{
							nvp = wltm.MultiplyPoint3x4(point);
						}
					}
					else
					{
						nvp = wltm.MultiplyPoint3x4(vector + vector2);
					}
				}
				else
				{
					float num3 = ((!(slide >= 0f)) ? (alpha + alpha * slidealpha * num2) : (alpha + (1f - alpha) * slidealpha * num2));
					if (num3 < 0f)
					{
						num3 = 0f;
					}
					else if (num3 >= 1f)
					{
						num3 = 0.99999f;
					}
					Vector3 vector3 = swtm.MultiplyPoint3x4(shape.splines[curve].InterpCurve3D(num3, true, ref k));
					float num4 = num3 + 0.01f;
					if (num3 + 0.01f >= 1f)
					{
						num4 = num3 - 0.01f;
					}
					Vector3 vector4 = swtm.MultiplyPoint3x4(shape.splines[curve].InterpCurve3D(num4, true, ref k));
					if (alpha + 0.01f < 1f)
					{
						dir = (vector3 - vector4).normalized;
					}
					else
					{
						dir = (vector4 - vector3).normalized;
					}
					Vector3 normalized = Vector3.Cross(delta, dir).normalized;
					rottm.SetColumn(0, normalized);
					rottm.SetColumn(1, Vector3.Cross(-normalized, dir));
					rottm.SetColumn(2, dir);
					rottm.SetColumn(3, vector3);
					float f = (-90f + rotate * num * num2) * ((float)Math.PI / 180f);
					tp.x = magnitude * Mathf.Cos(f);
					tp.y = magnitude * Mathf.Sin(f);
					tp.z = ((!flat) ? p.z : 0f);
					nvp = rottm.MultiplyPoint3x4(tp);
					nvp = wltm.MultiplyPoint3x4(nvp);
				}
			}
			else
			{
				nvp = p;
			}
			p = nvp;
		}
		return invtm.MultiplyPoint3x4(p);
	}

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

	public override bool Prepare(MegaModContext mc)
	{
		if ((bool)shape)
		{
			if (splinechanged || points == null || points.Length == 0)
			{
				PrepareShape();
				splinechanged = false;
			}
			limit2 = limit * limit;
			shapepos = shape.transform.position;
			slidealpha = slide * 0.01f;
			swtm = shape.transform.localToWorldMatrix;
			swltm = shape.transform.worldToLocalMatrix;
			lwtm = base.transform.localToWorldMatrix;
			wltm = base.transform.worldToLocalMatrix;
			return true;
		}
		return false;
	}
}