using System;
using System.Collections.Generic;
using TriangleNet.Data;
using TriangleNet.Geometry;

namespace TriangleNet.Tools
{
	// Token: 0x0200001B RID: 27
	public class Voronoi : IVoronoi
	{
		// Token: 0x060000F6 RID: 246 RVA: 0x00014852 File Offset: 0x00012A52
		public Voronoi(Mesh mesh)
		{
			this.mesh = mesh;
			this.Generate();
		}

		// Token: 0x17000044 RID: 68
		// (get) Token: 0x060000F7 RID: 247 RVA: 0x00014867 File Offset: 0x00012A67
		public Point[] Points
		{
			get
			{
				return this.points;
			}
		}

		// Token: 0x17000045 RID: 69
		// (get) Token: 0x060000F8 RID: 248 RVA: 0x0001486F File Offset: 0x00012A6F
		public ICollection<VoronoiRegion> Regions
		{
			get
			{
				return this.regions.Values;
			}
		}

		// Token: 0x060000F9 RID: 249 RVA: 0x0001487C File Offset: 0x00012A7C
		private void Generate()
		{
			this.mesh.Renumber();
			this.mesh.MakeVertexMap();
			this.points = new Point[this.mesh.triangles.Count + this.mesh.hullsize];
			this.regions = new Dictionary<int, VoronoiRegion>(this.mesh.vertices.Count);
			this.rayPoints = new Dictionary<int, Point>();
			this.rayIndex = 0;
			this.bounds = new BoundingBox();
			this.ComputeCircumCenters();
			foreach (Vertex vertex in this.mesh.vertices.Values)
			{
				this.regions.Add(vertex.id, new VoronoiRegion(vertex));
			}
			foreach (VoronoiRegion voronoiRegion in this.regions.Values)
			{
				this.ConstructVoronoiRegion(voronoiRegion);
			}
		}

		// Token: 0x060000FA RID: 250 RVA: 0x000149AC File Offset: 0x00012BAC
		private void ComputeCircumCenters()
		{
			Otri otri = default(Otri);
			double num = 0.0;
			double num2 = 0.0;
			foreach (Triangle triangle in this.mesh.triangles.Values)
			{
				otri.triangle = triangle;
				Point point = Primitives.FindCircumcenter(otri.Org(), otri.Dest(), otri.Apex(), ref num, ref num2);
				point.id = triangle.id;
				this.points[triangle.id] = point;
				this.bounds.Expand(point.x, point.y);
			}
			double num3 = Math.Max(this.bounds.Width, this.bounds.Height);
			this.bounds.Resize(num3, num3);
		}

		// Token: 0x060000FB RID: 251 RVA: 0x00014AA8 File Offset: 0x00012CA8
		private void ConstructVoronoiRegion(VoronoiRegion region)
		{
			Vertex vertex = region.Generator as Vertex;
			List<Point> list = new List<Point>();
			Otri otri = default(Otri);
			Otri otri2 = default(Otri);
			Otri otri3 = default(Otri);
			Otri otri4 = default(Otri);
			Osub osub = default(Osub);
			vertex.tri.Copy(ref otri2);
			otri2.Copy(ref otri);
			otri2.Onext(ref otri3);
			if (otri3.triangle == Mesh.dummytri)
			{
				otri2.Oprev(ref otri4);
				if (otri4.triangle != Mesh.dummytri)
				{
					otri2.Copy(ref otri3);
					otri2.OprevSelf();
					otri2.Copy(ref otri);
				}
			}
			while (otri3.triangle != Mesh.dummytri)
			{
				list.Add(this.points[otri.triangle.id]);
				region.AddNeighbor(otri.triangle.id, this.regions[otri.Apex().id]);
				if (otri3.Equal(otri2))
				{
					region.Add(list);
					return;
				}
				otri3.Copy(ref otri);
				otri3.OnextSelf();
			}
			region.Bounded = false;
			int count = this.mesh.triangles.Count;
			otri.Lprev(ref otri3);
			otri3.SegPivot(ref osub);
			int num = osub.seg.hash;
			list.Add(this.points[otri.triangle.id]);
			region.AddNeighbor(otri.triangle.id, this.regions[otri.Apex().id]);
			Point point;
			if (!this.rayPoints.TryGetValue(num, out point))
			{
				Vertex vertex2 = otri.Org();
				Vertex vertex3 = otri.Apex();
				this.BoxRayIntersection(this.points[otri.triangle.id], vertex2.y - vertex3.y, vertex3.x - vertex2.x, out point);
				point.id = count + this.rayIndex;
				this.points[count + this.rayIndex] = point;
				this.rayIndex++;
				this.rayPoints.Add(num, point);
			}
			list.Add(point);
			list.Reverse();
			otri2.Copy(ref otri);
			otri.Oprev(ref otri4);
			while (otri4.triangle != Mesh.dummytri)
			{
				list.Add(this.points[otri4.triangle.id]);
				region.AddNeighbor(otri4.triangle.id, this.regions[otri4.Apex().id]);
				otri4.Copy(ref otri);
				otri4.OprevSelf();
			}
			otri.SegPivot(ref osub);
			num = osub.seg.hash;
			if (!this.rayPoints.TryGetValue(num, out point))
			{
				Vertex vertex2 = otri.Org();
				Vertex vertex4 = otri.Dest();
				this.BoxRayIntersection(this.points[otri.triangle.id], vertex4.y - vertex2.y, vertex2.x - vertex4.x, out point);
				point.id = count + this.rayIndex;
				this.rayPoints.Add(num, point);
				this.points[count + this.rayIndex] = point;
				this.rayIndex++;
			}
			list.Add(point);
			region.AddNeighbor(point.id, this.regions[otri.Dest().id]);
			list.Reverse();
			region.Add(list);
		}

		// Token: 0x060000FC RID: 252 RVA: 0x00014E44 File Offset: 0x00013044
		private bool BoxRayIntersection(Point pt, double dx, double dy, out Point intersect)
		{
			double x = pt.X;
			double y = pt.Y;
			double minX = this.bounds.MinX;
			double maxX = this.bounds.MaxX;
			double minY = this.bounds.MinY;
			double maxY = this.bounds.MaxY;
			if (x < minX || x > maxX || y < minY || y > maxY)
			{
				intersect = null;
				return false;
			}
			double num;
			double num2;
			double num3;
			if (dx < 0.0)
			{
				num = (minX - x) / dx;
				num2 = minX;
				num3 = y + num * dy;
			}
			else if (dx > 0.0)
			{
				num = (maxX - x) / dx;
				num2 = maxX;
				num3 = y + num * dy;
			}
			else
			{
				num = double.MaxValue;
				num3 = (num2 = 0.0);
			}
			double num4;
			double num5;
			double num6;
			if (dy < 0.0)
			{
				num4 = (minY - y) / dy;
				num5 = x + num4 * dx;
				num6 = minY;
			}
			else if (dy > 0.0)
			{
				num4 = (maxY - y) / dy;
				num5 = x + num4 * dx;
				num6 = maxY;
			}
			else
			{
				num4 = double.MaxValue;
				num6 = (num5 = 0.0);
			}
			if (num < num4)
			{
				intersect = new Point(num2, num3);
			}
			else
			{
				intersect = new Point(num5, num6);
			}
			return true;
		}

		// Token: 0x040000C9 RID: 201
		private Mesh mesh;

		// Token: 0x040000CA RID: 202
		private Point[] points;

		// Token: 0x040000CB RID: 203
		private Dictionary<int, VoronoiRegion> regions;

		// Token: 0x040000CC RID: 204
		private Dictionary<int, Point> rayPoints;

		// Token: 0x040000CD RID: 205
		private int rayIndex;

		// Token: 0x040000CE RID: 206
		private BoundingBox bounds;
	}
}