using System.Collections.Generic;
using UnityEngine;

[ExecuteInEditMode]
public class MegaWrapRef : MonoBehaviour
{
	public float gap;

	public float shrink = 1f;

	public Vector3[] skinnedVerts;

	public Mesh mesh;

	public Vector3 offset = Vector3.zero;

	public bool targetIsSkin;

	public bool sourceIsSkin;

	public int nomapcount;

	public Matrix4x4[] bindposes;

	public Transform[] bones;

	public float size = 0.01f;

	public int vertindex;

	public Vector3[] verts;

	public MegaModifyObject target;

	public float maxdist = 0.25f;

	public int maxpoints = 4;

	public bool WrapEnabled = true;

	public MegaWrap source;

	public MegaNormalMethod NormalMethod;

	[HideInInspector]
	public MegaNormMap[] mapping;

	[HideInInspector]
	public int[] tris;

	[HideInInspector]
	public Vector3[] facenorms;

	[HideInInspector]
	public Vector3[] norms;

	[ContextMenu("Help")]
	public void Help()
	{
		Application.OpenURL("http://www.west-racing.com/mf/?page_id=3709");
	}

	private Vector4 Plane(Vector3 v1, Vector3 v2, Vector3 v3)
	{
		Vector3 vector = Vector4.zero;
		vector.x = (v2.y - v1.y) * (v3.z - v1.z) - (v2.z - v1.z) * (v3.y - v1.y);
		vector.y = (v2.z - v1.z) * (v3.x - v1.x) - (v2.x - v1.x) * (v3.z - v1.z);
		vector.z = (v2.x - v1.x) * (v3.y - v1.y) - (v2.y - v1.y) * (v3.x - v1.x);
		vector = vector.normalized;
		return new Vector4(vector.x, vector.y, vector.z, 0f - Vector3.Dot(v2, vector));
	}

	private float PlaneDist(Vector3 p, Vector4 plane)
	{
		Vector3 lhs = plane;
		return Vector3.Dot(lhs, p) + plane.w;
	}

	private float GetDistance(Vector3 p, Vector3 p0, Vector3 p1, Vector3 p2)
	{
		return MegaNearestPointTest.DistPoint3Triangle3Dbl(p, p0, p1, p2);
	}

	private float GetPlaneDistance(Vector3 p, Vector3 p0, Vector3 p1, Vector3 p2)
	{
		Vector4 plane = Plane(p0, p1, p2);
		return PlaneDist(p, plane);
	}

	public Vector3 MyBary(Vector3 p, Vector3 p0, Vector3 p1, Vector3 p2)
	{
		Vector3 zero = Vector3.zero;
		Vector3 lhs = FaceNormal(p0, p1, p2);
		float num = Vector3.Dot(lhs, Vector3.Cross(p1 - p0, p2 - p0));
		float num2 = Vector3.Dot(lhs, Vector3.Cross(p1 - p, p2 - p));
		float num3 = Vector3.Dot(lhs, Vector3.Cross(p2 - p, p0 - p));
		zero.x = num2 / num;
		zero.y = num3 / num;
		zero.z = 1f - zero.x - zero.y;
		return zero;
	}

	public Vector3 MyBary1(Vector3 p, Vector3 a, Vector3 b, Vector3 c)
	{
		Vector3 vector = b - a;
		Vector3 vector2 = c - a;
		Vector3 lhs = p - a;
		float num = Vector3.Dot(vector, vector);
		float num2 = Vector3.Dot(vector, vector2);
		float num3 = Vector3.Dot(vector2, vector2);
		float num4 = Vector3.Dot(lhs, vector);
		float num5 = Vector3.Dot(lhs, vector2);
		float num6 = num * num3 - num2 * num2;
		float num7 = (num3 * num4 - num2 * num5) / num6;
		float num8 = (num * num5 - num2 * num4) / num6;
		float x = 1f - num8 - num7;
		return new Vector3(x, num8, num7);
	}

	public Vector3 CalcBary(Vector3 p, Vector3 p0, Vector3 p1, Vector3 p2)
	{
		return MyBary(p, p0, p1, p2);
	}

	public float CalcArea(Vector3 p0, Vector3 p1, Vector3 p2)
	{
		Vector3 lhs = p1 - p0;
		Vector3 rhs = p2 - p0;
		return 0.5f * Vector3.Cross(lhs, rhs).magnitude;
	}

	public Vector3 FaceNormal(Vector3 p0, Vector3 p1, Vector3 p2)
	{
		Vector3 lhs = p1 - p0;
		Vector3 rhs = p2 - p0;
		return Vector3.Cross(lhs, rhs);
	}

	private static void CopyBlendShapes(Mesh mesh1, Mesh clonemesh)
	{
	}

	private Mesh CloneMesh(Mesh m)
	{
		Mesh mesh = new Mesh();
		mesh.vertices = m.vertices;
		mesh.uv2 = m.uv2;
		mesh.uv2 = m.uv2;
		mesh.uv = m.uv;
		mesh.normals = m.normals;
		mesh.tangents = m.tangents;
		mesh.colors = m.colors;
		mesh.subMeshCount = m.subMeshCount;
		for (int i = 0; i < m.subMeshCount; i++)
		{
			mesh.SetTriangles(m.GetTriangles(i), i);
		}
		CopyBlendShapes(m, mesh);
		mesh.boneWeights = m.boneWeights;
		mesh.bindposes = m.bindposes;
		mesh.name = m.name;
		mesh.RecalculateBounds();
		return mesh;
	}

	[ContextMenu("Reset Mesh")]
	public void ResetMesh()
	{
		if ((bool)mesh && (bool)source)
		{
			mesh.vertices = source.startverts;
			mesh.RecalculateBounds();
			RecalcNormals();
		}
		target = null;
	}

	public void Attach(MegaModifyObject modobj)
	{
		targetIsSkin = false;
		sourceIsSkin = false;
		nomapcount = 0;
		MeshFilter component = GetComponent<MeshFilter>();
		Mesh m = null;
		if (component != null)
		{
			m = component.mesh;
		}
		else
		{
			SkinnedMeshRenderer skinnedMeshRenderer = (SkinnedMeshRenderer)GetComponent(typeof(SkinnedMeshRenderer));
			if (skinnedMeshRenderer != null)
			{
				m = skinnedMeshRenderer.sharedMesh;
				sourceIsSkin = true;
			}
		}
		if (mesh == null)
		{
			mesh = CloneMesh(m);
		}
		if ((bool)component)
		{
			component.mesh = mesh;
		}
		else
		{
			SkinnedMeshRenderer skinnedMeshRenderer2 = (SkinnedMeshRenderer)GetComponent(typeof(SkinnedMeshRenderer));
			skinnedMeshRenderer2.sharedMesh = mesh;
		}
		if (!sourceIsSkin)
		{
			SkinnedMeshRenderer skinnedMeshRenderer3 = (SkinnedMeshRenderer)modobj.GetComponent(typeof(SkinnedMeshRenderer));
			if (skinnedMeshRenderer3 != null)
			{
				targetIsSkin = true;
				if (!sourceIsSkin)
				{
					Mesh sharedMesh = skinnedMeshRenderer3.sharedMesh;
					bindposes = sharedMesh.bindposes;
					bones = skinnedMeshRenderer3.bones;
					skinnedVerts = sharedMesh.vertices;
				}
			}
		}
		verts = mesh.vertices;
	}

	private void LateUpdate()
	{
		DoUpdate();
	}

	private Vector3 GetSkinPos(MegaWrap src, int i)
	{
		Vector3 point = target.sverts[i];
		Vector3 position = bindposes[src.boneweights[i].boneIndex0].MultiplyPoint(point);
		Vector3 vector = bones[src.boneweights[i].boneIndex0].TransformPoint(position) * src.boneweights[i].weight0;
		position = bindposes[src.boneweights[i].boneIndex1].MultiplyPoint(point);
		vector += bones[src.boneweights[i].boneIndex1].TransformPoint(position) * src.boneweights[i].weight1;
		position = bindposes[src.boneweights[i].boneIndex2].MultiplyPoint(point);
		vector += bones[src.boneweights[i].boneIndex2].TransformPoint(position) * src.boneweights[i].weight2;
		position = bindposes[src.boneweights[i].boneIndex3].MultiplyPoint(point);
		return vector + bones[src.boneweights[i].boneIndex3].TransformPoint(position) * src.boneweights[i].weight3;
	}

	public Vector3 GetCoordMine(Vector3 A, Vector3 B, Vector3 C, Vector3 bary)
	{
		Vector3 zero = Vector3.zero;
		zero.x = bary.x * A.x + bary.y * B.x + bary.z * C.x;
		zero.y = bary.x * A.y + bary.y * B.y + bary.z * C.y;
		zero.z = bary.x * A.z + bary.y * B.z + bary.z * C.z;
		return zero;
	}

	private void DoUpdate()
	{
		if (source == null || !WrapEnabled || target == null || source.bindverts == null)
		{
			return;
		}
		if (targetIsSkin && source.neededVerts != null && source.neededVerts.Count > 0)
		{
			if (source.boneweights == null)
			{
				SkinnedMeshRenderer skinnedMeshRenderer = (SkinnedMeshRenderer)target.GetComponent(typeof(SkinnedMeshRenderer));
				if (skinnedMeshRenderer != null && !sourceIsSkin)
				{
					Mesh sharedMesh = skinnedMeshRenderer.sharedMesh;
					bindposes = sharedMesh.bindposes;
					source.boneweights = sharedMesh.boneWeights;
				}
			}
			for (int i = 0; i < source.neededVerts.Count; i++)
			{
				skinnedVerts[source.neededVerts[i]] = GetSkinPos(source, source.neededVerts[i]);
			}
		}
		Vector3 zero = Vector3.zero;
		if (targetIsSkin && !sourceIsSkin)
		{
			for (int j = 0; j < source.bindverts.Length; j++)
			{
				if (source.bindverts[j].verts.Count > 0)
				{
					zero = Vector3.zero;
					for (int k = 0; k < source.bindverts[j].verts.Count; k++)
					{
						MegaBindInf megaBindInf = source.bindverts[j].verts[k];
						Vector3 vector = skinnedVerts[megaBindInf.i0];
						Vector3 vector2 = skinnedVerts[megaBindInf.i1];
						Vector3 vector3 = skinnedVerts[megaBindInf.i2];
						Vector3 coordMine = GetCoordMine(vector, vector2, vector3, megaBindInf.bary);
						Vector3 vector4 = FaceNormal(vector, vector2, vector3);
						coordMine += (megaBindInf.dist * shrink + gap) * vector4.normalized;
						zero += coordMine * (megaBindInf.weight / source.bindverts[j].weight);
					}
					verts[j] = base.transform.InverseTransformPoint(zero) + offset;
				}
			}
		}
		else
		{
			for (int l = 0; l < source.bindverts.Length; l++)
			{
				if (source.bindverts[l].verts.Count > 0)
				{
					zero = Vector3.zero;
					for (int m = 0; m < source.bindverts[l].verts.Count; m++)
					{
						MegaBindInf megaBindInf2 = source.bindverts[l].verts[m];
						Vector3 vector5 = target.sverts[megaBindInf2.i0];
						Vector3 vector6 = target.sverts[megaBindInf2.i1];
						Vector3 vector7 = target.sverts[megaBindInf2.i2];
						Vector3 coordMine2 = GetCoordMine(vector5, vector6, vector7, megaBindInf2.bary);
						Vector3 vector8 = FaceNormal(vector5, vector6, vector7);
						coordMine2 += (megaBindInf2.dist * shrink + gap) * vector8.normalized;
						zero += coordMine2 * (megaBindInf2.weight / source.bindverts[l].weight);
					}
				}
				else
				{
					zero = source.freeverts[l];
				}
				zero = target.transform.TransformPoint(zero);
				verts[l] = base.transform.InverseTransformPoint(zero) + offset;
			}
		}
		mesh.vertices = verts;
		RecalcNormals();
		mesh.RecalculateBounds();
	}

	private int[] FindFacesUsing(Vector3 p, Vector3 n)
	{
		List<int> list = new List<int>();
		Vector3 zero = Vector3.zero;
		for (int i = 0; i < tris.Length; i += 3)
		{
			zero = verts[tris[i]];
			if (zero.x == p.x && zero.y == p.y && zero.z == p.z)
			{
				if (n.Equals(norms[tris[i]]))
				{
					list.Add(i / 3);
				}
				continue;
			}
			zero = verts[tris[i + 1]];
			if (zero.x == p.x && zero.y == p.y && zero.z == p.z)
			{
				if (n.Equals(norms[tris[i + 1]]))
				{
					list.Add(i / 3);
				}
				continue;
			}
			zero = verts[tris[i + 2]];
			if (zero.x == p.x && zero.y == p.y && zero.z == p.z && n.Equals(norms[tris[i + 2]]))
			{
				list.Add(i / 3);
			}
		}
		return list.ToArray();
	}

	public void BuildNormalMapping(Mesh mesh, bool force)
	{
		if (mapping == null || mapping.Length == 0 || force)
		{
			tris = mesh.triangles;
			norms = mesh.normals;
			facenorms = new Vector3[tris.Length / 3];
			mapping = new MegaNormMap[verts.Length];
			for (int i = 0; i < verts.Length; i++)
			{
				mapping[i] = new MegaNormMap();
				mapping[i].faces = FindFacesUsing(verts[i], norms[i]);
			}
		}
	}

	public void RecalcNormals()
	{
		if (NormalMethod == MegaNormalMethod.Unity)
		{
			mesh.RecalculateNormals();
			return;
		}
		if (mapping == null)
		{
			BuildNormalMapping(mesh, false);
		}
		RecalcNormals(mesh, verts);
	}

	public void RecalcNormals(Mesh ms, Vector3[] _verts)
	{
		int num = 0;
		Vector3 zero = Vector3.zero;
		Vector3 zero2 = Vector3.zero;
		Vector3 zero3 = Vector3.zero;
		Vector3 zero4 = Vector3.zero;
		Vector3 zero5 = Vector3.zero;
		for (int i = 0; i < tris.Length; i += 3)
		{
			zero = _verts[tris[i]];
			zero2 = _verts[tris[i + 1]];
			zero3 = _verts[tris[i + 2]];
			zero4.x = zero2.x - zero.x;
			zero4.y = zero2.y - zero.y;
			zero4.z = zero2.z - zero.z;
			zero5.x = zero3.x - zero2.x;
			zero5.y = zero3.y - zero2.y;
			zero5.z = zero3.z - zero2.z;
			zero.x = zero4.y * zero5.z - zero4.z * zero5.y;
			zero.y = zero4.z * zero5.x - zero4.x * zero5.z;
			zero.z = zero4.x * zero5.y - zero4.y * zero5.x;
			facenorms[num++] = zero;
		}
		for (int j = 0; j < norms.Length; j++)
		{
			if (mapping[j].faces.Length > 0)
			{
				Vector3 vector = facenorms[mapping[j].faces[0]];
				for (int k = 1; k < mapping[j].faces.Length; k++)
				{
					zero = facenorms[mapping[j].faces[k]];
					vector.x += zero.x;
					vector.y += zero.y;
					vector.z += zero.z;
				}
				float f = vector.x * vector.x + vector.y * vector.y + vector.z * vector.z;
				f = 1f / Mathf.Sqrt(f);
				vector.x *= f;
				vector.y *= f;
				vector.z *= f;
				norms[j] = vector;
			}
			else
			{
				norms[j] = Vector3.up;
			}
		}
		ms.normals = norms;
	}
}