using System;
using System.Collections.Generic;

namespace Parabox.CSG
{
	// Token: 0x02000017 RID: 23
	internal class CSG_Node
	{
		// Token: 0x060000AB RID: 171 RVA: 0x0000D7F5 File Offset: 0x0000BBF5
		public CSG_Node()
		{
			this.front = null;
			this.back = null;
		}

		// Token: 0x060000AC RID: 172 RVA: 0x0000D80B File Offset: 0x0000BC0B
		public CSG_Node(List<CSG_Polygon> list)
		{
			this.Build(list);
		}

		// Token: 0x060000AD RID: 173 RVA: 0x0000D81A File Offset: 0x0000BC1A
		public CSG_Node(List<CSG_Polygon> list, CSG_Plane plane, CSG_Node front, CSG_Node back)
		{
			this.polygons = list;
			this.plane = plane;
			this.front = front;
			this.back = back;
		}

		// Token: 0x060000AE RID: 174 RVA: 0x0000D840 File Offset: 0x0000BC40
		public CSG_Node Clone()
		{
			return new CSG_Node(this.polygons, this.plane, this.front, this.back);
		}

		// Token: 0x060000AF RID: 175 RVA: 0x0000D86C File Offset: 0x0000BC6C
		public void ClipTo(CSG_Node other)
		{
			this.polygons = other.ClipPolygons(this.polygons);
			if (this.front != null)
			{
				this.front.ClipTo(other);
			}
			if (this.back != null)
			{
				this.back.ClipTo(other);
			}
		}

		// Token: 0x060000B0 RID: 176 RVA: 0x0000D8BC File Offset: 0x0000BCBC
		public void Invert()
		{
			for (int i = 0; i < this.polygons.Count; i++)
			{
				this.polygons[i].Flip();
			}
			this.plane.Flip();
			if (this.front != null)
			{
				this.front.Invert();
			}
			if (this.back != null)
			{
				this.back.Invert();
			}
			CSG_Node csg_Node = this.front;
			this.front = this.back;
			this.back = csg_Node;
		}

		// Token: 0x060000B1 RID: 177 RVA: 0x0000D948 File Offset: 0x0000BD48
		public void Build(List<CSG_Polygon> list)
		{
			if (list.Count < 1)
			{
				return;
			}
			if (this.plane == null || !this.plane.Valid())
			{
				this.plane = new CSG_Plane();
				this.plane.normal = list[0].plane.normal;
				this.plane.w = list[0].plane.w;
			}
			if (this.polygons == null)
			{
				this.polygons = new List<CSG_Polygon>();
			}
			List<CSG_Polygon> list2 = new List<CSG_Polygon>();
			List<CSG_Polygon> list3 = new List<CSG_Polygon>();
			for (int i = 0; i < list.Count; i++)
			{
				this.plane.SplitPolygon(list[i], this.polygons, this.polygons, list2, list3);
			}
			if (list2.Count > 0)
			{
				if (this.front == null)
				{
					this.front = new CSG_Node();
				}
				this.front.Build(list2);
			}
			if (list3.Count > 0)
			{
				if (this.back == null)
				{
					this.back = new CSG_Node();
				}
				this.back.Build(list3);
			}
		}

		// Token: 0x060000B2 RID: 178 RVA: 0x0000DA78 File Offset: 0x0000BE78
		public List<CSG_Polygon> ClipPolygons(List<CSG_Polygon> list)
		{
			if (!this.plane.Valid())
			{
				return list;
			}
			List<CSG_Polygon> list2 = new List<CSG_Polygon>();
			List<CSG_Polygon> list3 = new List<CSG_Polygon>();
			for (int i = 0; i < list.Count; i++)
			{
				this.plane.SplitPolygon(list[i], list2, list3, list2, list3);
			}
			if (this.front != null)
			{
				list2 = this.front.ClipPolygons(list2);
			}
			if (this.back != null)
			{
				list3 = this.back.ClipPolygons(list3);
			}
			else
			{
				list3.Clear();
			}
			list2.AddRange(list3);
			return list2;
		}

		// Token: 0x060000B3 RID: 179 RVA: 0x0000DB14 File Offset: 0x0000BF14
		public List<CSG_Polygon> AllPolygons()
		{
			List<CSG_Polygon> list = this.polygons;
			List<CSG_Polygon> list2 = new List<CSG_Polygon>();
			List<CSG_Polygon> list3 = new List<CSG_Polygon>();
			if (this.front != null)
			{
				list2 = this.front.AllPolygons();
			}
			if (this.back != null)
			{
				list3 = this.back.AllPolygons();
			}
			list.AddRange(list2);
			list.AddRange(list3);
			return list;
		}

		// Token: 0x060000B4 RID: 180 RVA: 0x0000DB74 File Offset: 0x0000BF74
		public static CSG_Node Union(CSG_Node a1, CSG_Node b1)
		{
			CSG_Node csg_Node = a1.Clone();
			CSG_Node csg_Node2 = b1.Clone();
			csg_Node.ClipTo(csg_Node2);
			csg_Node2.ClipTo(csg_Node);
			csg_Node2.Invert();
			csg_Node2.ClipTo(csg_Node);
			csg_Node2.Invert();
			csg_Node.Build(csg_Node2.AllPolygons());
			return new CSG_Node(csg_Node.AllPolygons());
		}

		// Token: 0x060000B5 RID: 181 RVA: 0x0000DBCC File Offset: 0x0000BFCC
		public static CSG_Node Subtract(CSG_Node a1, CSG_Node b1)
		{
			CSG_Node csg_Node = a1.Clone();
			CSG_Node csg_Node2 = b1.Clone();
			csg_Node.Invert();
			csg_Node.ClipTo(csg_Node2);
			csg_Node2.ClipTo(csg_Node);
			csg_Node2.Invert();
			csg_Node2.ClipTo(csg_Node);
			csg_Node2.Invert();
			csg_Node.Build(csg_Node2.AllPolygons());
			csg_Node.Invert();
			return new CSG_Node(csg_Node.AllPolygons());
		}

		// Token: 0x060000B6 RID: 182 RVA: 0x0000DC30 File Offset: 0x0000C030
		public static CSG_Node Intersect(CSG_Node a1, CSG_Node b1)
		{
			CSG_Node csg_Node = a1.Clone();
			CSG_Node csg_Node2 = b1.Clone();
			csg_Node.Invert();
			csg_Node2.ClipTo(csg_Node);
			csg_Node2.Invert();
			csg_Node.ClipTo(csg_Node2);
			csg_Node2.ClipTo(csg_Node);
			csg_Node.Build(csg_Node2.AllPolygons());
			csg_Node.Invert();
			return new CSG_Node(csg_Node.AllPolygons());
		}

		// Token: 0x04000032 RID: 50
		public List<CSG_Polygon> polygons;

		// Token: 0x04000033 RID: 51
		public CSG_Node front;

		// Token: 0x04000034 RID: 52
		public CSG_Node back;

		// Token: 0x04000035 RID: 53
		public CSG_Plane plane;
	}
}