using System;
using TriangleNet.Data;
using TriangleNet.Geometry;
using TriangleNet.Log;

namespace TriangleNet.Algorithm
{
	// Token: 0x0200003D RID: 61
	internal class Incremental
	{
		// Token: 0x0600022A RID: 554 RVA: 0x0001A694 File Offset: 0x00018894
		private void GetBoundingBox()
		{
			Otri otri = default(Otri);
			BoundingBox bounds = this.mesh.bounds;
			double num = bounds.Width;
			if (bounds.Height > num)
			{
				num = bounds.Height;
			}
			if (num == 0.0)
			{
				num = 1.0;
			}
			this.mesh.infvertex1 = new Vertex(bounds.MinX - 50.0 * num, bounds.MinY - 40.0 * num);
			this.mesh.infvertex2 = new Vertex(bounds.MaxX + 50.0 * num, bounds.MinY - 40.0 * num);
			this.mesh.infvertex3 = new Vertex(0.5 * (bounds.MinX + bounds.MaxX), bounds.MaxY + 60.0 * num);
			this.mesh.MakeTriangle(ref otri);
			otri.SetOrg(this.mesh.infvertex1);
			otri.SetDest(this.mesh.infvertex2);
			otri.SetApex(this.mesh.infvertex3);
			Mesh.dummytri.neighbors[0] = otri;
		}

		// Token: 0x0600022B RID: 555 RVA: 0x0001A7D8 File Offset: 0x000189D8
		private int RemoveBox()
		{
			Otri otri = default(Otri);
			Otri otri2 = default(Otri);
			Otri otri3 = default(Otri);
			Otri otri4 = default(Otri);
			Otri otri5 = default(Otri);
			Otri otri6 = default(Otri);
			bool flag = !this.mesh.behavior.Poly;
			otri4.triangle = Mesh.dummytri;
			otri4.orient = 0;
			otri4.SymSelf();
			otri4.Lprev(ref otri5);
			otri4.LnextSelf();
			otri4.SymSelf();
			otri4.Lprev(ref otri2);
			otri2.SymSelf();
			otri4.Lnext(ref otri3);
			otri3.SymSelf();
			if (otri3.triangle == Mesh.dummytri)
			{
				otri2.LprevSelf();
				otri2.SymSelf();
			}
			Mesh.dummytri.neighbors[0] = otri2;
			int num = -2;
			while (!otri4.Equal(otri5))
			{
				num++;
				otri4.Lprev(ref otri6);
				otri6.SymSelf();
				if (flag && otri6.triangle != Mesh.dummytri)
				{
					Vertex vertex = otri6.Org();
					if (vertex.mark == 0)
					{
						vertex.mark = 1;
					}
				}
				otri6.Dissolve();
				otri4.Lnext(ref otri);
				otri.Sym(ref otri4);
				this.mesh.TriangleDealloc(otri.triangle);
				if (otri4.triangle == Mesh.dummytri)
				{
					otri6.Copy(ref otri4);
				}
			}
			this.mesh.TriangleDealloc(otri5.triangle);
			return num;
		}

		// Token: 0x0600022C RID: 556 RVA: 0x0001A958 File Offset: 0x00018B58
		public int Triangulate(Mesh mesh)
		{
			this.mesh = mesh;
			Otri otri = default(Otri);
			this.GetBoundingBox();
			foreach (Vertex vertex in mesh.vertices.Values)
			{
				otri.triangle = Mesh.dummytri;
				Osub osub = default(Osub);
				if (mesh.InsertVertex(vertex, ref otri, ref osub, false, false) == InsertVertexResult.Duplicate)
				{
					if (Behavior.Verbose)
					{
						SimpleLog.Instance.Warning("A duplicate vertex appeared and was ignored.", "Incremental.IncrementalDelaunay()");
					}
					vertex.type = VertexType.UndeadVertex;
					mesh.undeads++;
				}
			}
			return this.RemoveBox();
		}

		// Token: 0x04000130 RID: 304
		private Mesh mesh;
	}
}