using System;
using System.Collections.Generic;
using ProBuilder2.Common;
using UnityEngine;

namespace ProBuilder2.MeshOperations
{
	// Token: 0x02000011 RID: 17
	public static class pb_GrowShrink
	{
		// Token: 0x06000096 RID: 150 RVA: 0x0000C8EC File Offset: 0x0000ACEC
		public static HashSet<pb_Face> GrowSelection(pb_Object pb, IList<pb_Face> faces, float maxAngleDiff = -1f)
		{
			List<pb_WingedEdge> wingedEdges = pb_WingedEdge.GetWingedEdges(pb, true);
			HashSet<pb_Face> hashSet = new HashSet<pb_Face>(faces);
			HashSet<pb_Face> hashSet2 = new HashSet<pb_Face>();
			Vector3 vector = Vector3.zero;
			bool flag = maxAngleDiff > 0f;
			for (int i = 0; i < wingedEdges.Count; i++)
			{
				if (hashSet.Contains(wingedEdges[i].face))
				{
					if (flag)
					{
						vector = pb_Math.Normal(pb, wingedEdges[i].face);
					}
					pb_WingedEdgeEnumerator enumerator = wingedEdges[i].GetEnumerator();
					try
					{
						while (enumerator.MoveNext())
						{
							pb_WingedEdge pb_WingedEdge = enumerator.Current;
							if (pb_WingedEdge.opposite != null && !hashSet.Contains(pb_WingedEdge.opposite.face))
							{
								if (flag)
								{
									Vector3 vector2 = pb_Math.Normal(pb, pb_WingedEdge.opposite.face);
									if (Vector3.Angle(vector, vector2) < maxAngleDiff)
									{
										hashSet2.Add(pb_WingedEdge.opposite.face);
									}
								}
								else
								{
									hashSet2.Add(pb_WingedEdge.opposite.face);
								}
							}
						}
					}
					finally
					{
						IDisposable disposable;
						if ((disposable = enumerator as IDisposable) != null)
						{
							disposable.Dispose();
						}
					}
				}
			}
			return hashSet2;
		}

		// Token: 0x06000097 RID: 151 RVA: 0x0000CA40 File Offset: 0x0000AE40
		public static void Flood(pb_WingedEdge wing, HashSet<pb_Face> selection)
		{
			pb_GrowShrink.Flood(null, wing, pb_GrowShrink.Vector3_Zero, -1f, selection);
		}

		// Token: 0x06000098 RID: 152 RVA: 0x0000CA54 File Offset: 0x0000AE54
		public static void Flood(pb_Object pb, pb_WingedEdge wing, Vector3 wingNrm, float maxAngle, HashSet<pb_Face> selection)
		{
			pb_WingedEdge pb_WingedEdge = wing;
			do
			{
				pb_WingedEdge opposite = pb_WingedEdge.opposite;
				if (opposite != null && !selection.Contains(opposite.face))
				{
					if (maxAngle > 0f)
					{
						Vector3 vector = pb_Math.Normal(pb, opposite.face);
						if (Vector3.Angle(wingNrm, vector) < maxAngle && selection.Add(opposite.face))
						{
							pb_GrowShrink.Flood(pb, opposite, vector, maxAngle, selection);
						}
					}
					else if (selection.Add(opposite.face))
					{
						pb_GrowShrink.Flood(pb, opposite, wingNrm, maxAngle, selection);
					}
				}
				pb_WingedEdge = pb_WingedEdge.next;
			}
			while (pb_WingedEdge != wing);
		}

		// Token: 0x06000099 RID: 153 RVA: 0x0000CAF4 File Offset: 0x0000AEF4
		public static HashSet<pb_Face> FloodSelection(pb_Object pb, IList<pb_Face> faces, float maxAngleDiff)
		{
			List<pb_WingedEdge> wingedEdges = pb_WingedEdge.GetWingedEdges(pb, true);
			HashSet<pb_Face> hashSet = new HashSet<pb_Face>(faces);
			HashSet<pb_Face> hashSet2 = new HashSet<pb_Face>();
			for (int i = 0; i < wingedEdges.Count; i++)
			{
				if (!hashSet2.Contains(wingedEdges[i].face) && hashSet.Contains(wingedEdges[i].face))
				{
					hashSet2.Add(wingedEdges[i].face);
					pb_GrowShrink.Flood(pb, wingedEdges[i], (maxAngleDiff <= 0f) ? pb_GrowShrink.Vector3_Zero : pb_Math.Normal(pb, wingedEdges[i].face), maxAngleDiff, hashSet2);
				}
			}
			return hashSet2;
		}

		// Token: 0x0400002E RID: 46
		private static readonly Vector3 Vector3_Zero = new Vector3(0f, 0f, 0f);
	}
}