using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using System.Text;
using BepInEx;
using BepInEx.Bootstrap;
using BepInEx.Configuration;
using BepInEx.Logging;
using DunGen;
using GameNetcodeStuff;
using HarmonyLib;
using LethalLevelLoader;
using LethalLevelLoader.AssetBundles;
using Microsoft.CodeAnalysis;
using MoreCompany.Cosmetics;
using Scoops;
using Scoops.compatibility;
using Scoops.patches;
using Scoops.service;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.AI;
using UnityEngine.Experimental.Rendering;
using UnityEngine.InputSystem;
using UnityEngine.Rendering;
using UnityEngine.Rendering.HighDefinition;
using UnityEngine.SceneManagement;
using UnityMeshSimplifier;
using UnityMeshSimplifier.Internal;
using UnityMeshSimplifier.Utility;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.Default | DebuggableAttribute.DebuggingModes.DisableOptimizations | DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints | DebuggableAttribute.DebuggingModes.EnableEditAndContinue)]
[assembly: InternalsVisibleTo("Whinarn.UnityMeshSimplifier.Editor")]
[assembly: TargetFramework(".NETStandard,Version=v2.1", FrameworkDisplayName = ".NET Standard 2.1")]
[assembly: IgnoresAccessChecksTo("Assembly-CSharp")]
[assembly: IgnoresAccessChecksTo("LethalLevelLoader")]
[assembly: IgnoresAccessChecksTo("Unity.InputSystem")]
[assembly: IgnoresAccessChecksTo("Unity.Netcode.Runtime")]
[assembly: IgnoresAccessChecksTo("Unity.RenderPipelines.Core.Runtime")]
[assembly: IgnoresAccessChecksTo("Unity.RenderPipelines.HighDefinition.Runtime")]
[assembly: AssemblyCompany("LethalSponge")]
[assembly: AssemblyConfiguration("Debug")]
[assembly: AssemblyFileVersion("0.0.0.0")]
[assembly: AssemblyInformationalVersion("0.0.0-alpha.0.60+8e73371a76f6e40597f30002ede5013018327d8b")]
[assembly: AssemblyProduct("LethalSponge")]
[assembly: AssemblyTitle("LethalSponge")]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
[assembly: AssemblyVersion("0.0.0.0")]
[module: UnverifiableCode]
[module: RefSafetyRules(11)]
namespace Microsoft.CodeAnalysis
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	internal sealed class EmbeddedAttribute : Attribute
	{
	}
}
namespace System.Runtime.CompilerServices
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	[AttributeUsage(AttributeTargets.Module, AllowMultiple = false, Inherited = false)]
	internal sealed class RefSafetyRulesAttribute : Attribute
	{
		public readonly int Version;

		public RefSafetyRulesAttribute(int P_0)
		{
			Version = P_0;
		}
	}
}
namespace Sponge.Utilities.IL
{
	public class ILInjector
	{
		[CompilerGenerated]
		private sealed class <GetRelativeInstructions>d__32 : IEnumerable<CodeInstruction>, IEnumerable, IEnumerator<CodeInstruction>, IEnumerator, IDisposable
		{
			private int <>1__state;

			private CodeInstruction <>2__current;

			private int <>l__initialThreadId;

			private int offset;

			public int <>3__offset;

			private int size;

			public int <>3__size;

			public ILInjector <>4__this;

			private int <i>5__1;

			CodeInstruction IEnumerator<CodeInstruction>.Current
			{
				[DebuggerHidden]
				get
				{
					return <>2__current;
				}
			}

			object IEnumerator.Current
			{
				[DebuggerHidden]
				get
				{
					return <>2__current;
				}
			}

			[DebuggerHidden]
			public <GetRelativeInstructions>d__32(int <>1__state)
			{
				this.<>1__state = <>1__state;
				<>l__initialThreadId = Environment.CurrentManagedThreadId;
			}

			[DebuggerHidden]
			void IDisposable.Dispose()
			{
				<>1__state = -2;
			}

			private bool MoveNext()
			{
				switch (<>1__state)
				{
				default:
					return false;
				case 0:
					<>1__state = -1;
					<i>5__1 = 0;
					break;
				case 1:
					<>1__state = -1;
					<i>5__1++;
					break;
				}
				if (<i>5__1 < size)
				{
					<>2__current = <>4__this.instructions[<>4__this.index + offset + <i>5__1];
					<>1__state = 1;
					return true;
				}
				return false;
			}

			bool IEnumerator.MoveNext()
			{
				//ILSpy generated this explicit interface implementation from .override directive in MoveNext
				return this.MoveNext();
			}

			[DebuggerHidden]
			void IEnumerator.Reset()
			{
				throw new NotSupportedException();
			}

			[DebuggerHidden]
			IEnumerator<CodeInstruction> IEnumerable<CodeInstruction>.GetEnumerator()
			{
				<GetRelativeInstructions>d__32 <GetRelativeInstructions>d__;
				if (<>1__state == -2 && <>l__initialThreadId == Environment.CurrentManagedThreadId)
				{
					<>1__state = 0;
					<GetRelativeInstructions>d__ = this;
				}
				else
				{
					<GetRelativeInstructions>d__ = new <GetRelativeInstructions>d__32(0)
					{
						<>4__this = <>4__this
					};
				}
				<GetRelativeInstructions>d__.offset = <>3__offset;
				<GetRelativeInstructions>d__.size = <>3__size;
				return <GetRelativeInstructions>d__;
			}

			[DebuggerHidden]
			IEnumerator IEnumerable.GetEnumerator()
			{
				return ((IEnumerable<CodeInstruction>)this).GetEnumerator();
			}
		}

		private const string INVALID = "Injector is invalid";

		private const string MATCH_END_INVALID = "The end of the last search was invalid";

		private List<CodeInstruction> instructions = instructions.ToList();

		private ILGenerator generator;

		private int index;

		private int matchEnd;

		public bool IsValid => instructions != null && IsIndexValid(index);

		public CodeInstruction Instruction
		{
			get
			{
				if (!IsIndexInRange(index))
				{
					return null;
				}
				return instructions[index];
			}
			set
			{
				if (!IsIndexInRange(index))
				{
					throw new InvalidOperationException($"Current index {index} is out of range of instruction count {instructions.Count}");
				}
				instructions[index] = value;
			}
		}

		public CodeInstruction LastMatchedInstruction
		{
			get
			{
				int num = matchEnd - 1;
				if (!IsIndexInRange(num))
				{
					return null;
				}
				return instructions[num];
			}
			set
			{
				int num = matchEnd - 1;
				if (!IsIndexInRange(num))
				{
					throw new InvalidOperationException($"Last matched index {index} is out of range of instruction count {instructions.Count}");
				}
				instructions[num] = value;
			}
		}

		public ICollection<CodeInstruction> Instructions => instructions.AsReadOnly();

		public ILInjector(IEnumerable<CodeInstruction> instructions, ILGenerator generator = null)
		{
			this.generator = generator;
			index = 0;
			matchEnd = -1;
			base..ctor();
		}

		public ILInjector GoToStart()
		{
			matchEnd = index;
			index = 0;
			return this;
		}

		public ILInjector GoToEnd()
		{
			matchEnd = index;
			index = instructions.Count;
			return this;
		}

		public ILInjector Forward(int offset)
		{
			if (!IsValid)
			{
				return this;
			}
			matchEnd = index;
			index = Math.Clamp(index + offset, -1, instructions.Count);
			return this;
		}

		public ILInjector Back(int offset)
		{
			return Forward(-offset);
		}

		private void MarkInvalid()
		{
			index = -1;
			matchEnd = -1;
		}

		private void Search(bool forward, ILMatcher[] predicates)
		{
			if (!IsValid)
			{
				return;
			}
			int num = 1;
			if (!forward)
			{
				num = -1;
				index--;
			}
			while (forward ? (index < instructions.Count) : (index >= 0))
			{
				if (forward && index + predicates.Length > instructions.Count)
				{
					index = instructions.Count;
					break;
				}
				int i;
				for (i = 0; i < predicates.Length && predicates[i].Matches(instructions[index + i]); i++)
				{
				}
				if (i == predicates.Length)
				{
					matchEnd = index + i;
					return;
				}
				index += num;
			}
			MarkInvalid();
		}

		public ILInjector Find(params ILMatcher[] predicates)
		{
			Search(forward: true, predicates);
			return this;
		}

		public ILInjector ReverseFind(params ILMatcher[] predicates)
		{
			Search(forward: false, predicates);
			return this;
		}

		public ILInjector GoToPush(int popIndex)
		{
			if (!IsValid)
			{
				return this;
			}
			matchEnd = index;
			index--;
			int num = 0;
			while (index >= 0)
			{
				CodeInstruction instruction = instructions[index];
				num += instruction.PushCount();
				num -= instruction.PopCount();
				if (num > popIndex)
				{
					return this;
				}
				index--;
			}
			return this;
		}

		public ILInjector SkipBranch()
		{
			if (Instruction == null)
			{
				return this;
			}
			if (!(Instruction.operand is Label label) || 1 == 0)
			{
				throw new InvalidOperationException($"Current instruction is not a branch: {Instruction}");
			}
			return FindLabel(label);
		}

		public ILInjector FindLabel(Label label)
		{
			matchEnd = index + 1;
			for (index = 0; index < instructions.Count; index++)
			{
				if (instructions[index].labels.Contains(label))
				{
					return this;
				}
			}
			MarkInvalid();
			return this;
		}

		public ILInjector GoToMatchEnd()
		{
			index = matchEnd;
			return this;
		}

		public ILInjector GoToLastMatchedInstruction()
		{
			if (!IsIndexValid(matchEnd))
			{
				return this;
			}
			index = matchEnd - 1;
			return this;
		}

		private bool IsIndexValid(int index)
		{
			return index != -1;
		}

		private bool IsIndexInRange(int index)
		{
			return index >= 0 && index < instructions.Count;
		}

		public CodeInstruction GetRelativeInstruction(int offset)
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			int num = index + offset;
			if (!IsIndexInRange(num))
			{
				throw new IndexOutOfRangeException($"Offset {offset} would read out of bounds at index {num}");
			}
			return instructions[num];
		}

		public void SetRelativeInstruction(int offset, CodeInstruction instruction)
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			int num = index + offset;
			if (!IsIndexInRange(num))
			{
				throw new IndexOutOfRangeException($"Offset {offset} would write out of bounds at index {num}");
			}
			instructions[num] = instruction;
		}

		[IteratorStateMachine(typeof(<GetRelativeInstructions>d__32))]
		public IEnumerable<CodeInstruction> GetRelativeInstructions(int offset, int size)
		{
			//yield-return decompiler failed: Unexpected instruction in Iterator.Dispose()
			return new <GetRelativeInstructions>d__32(-2)
			{
				<>4__this = this,
				<>3__offset = offset,
				<>3__size = size
			};
		}

		public IEnumerable<CodeInstruction> GetRelativeInstructions(int size)
		{
			return GetRelativeInstructions(0, size);
		}

		private void GetLastMatchRangeAbsolute(out int start, out int end)
		{
			start = index;
			end = matchEnd;
			if (start > end)
			{
				int num = end;
				int num2 = start;
				start = num;
				end = num2;
			}
		}

		private void GetLastMatchRange(out int start, out int size)
		{
			GetLastMatchRangeAbsolute(out start, out var end);
			if (start < 0 || start >= instructions.Count)
			{
				throw new InvalidOperationException($"Last match range starts at invalid index {start}");
			}
			if (end < 0 || end > instructions.Count)
			{
				throw new InvalidOperationException($"Last match range ends at invalid index {end}");
			}
			size = end - start;
		}

		public List<CodeInstruction> GetLastMatch()
		{
			GetLastMatchRange(out var start, out var size);
			return instructions.GetRange(start, size);
		}

		public Label AddLabel()
		{
			if (generator == null)
			{
				throw new InvalidOperationException("No ILGenerator was provided");
			}
			Label label = generator.DefineLabel();
			Instruction.labels.Add(label);
			return label;
		}

		public ILInjector AddLabel(Label label)
		{
			Instruction.labels.Add(label);
			return this;
		}

		public ILInjector InsertInPlace(params CodeInstruction[] instructions)
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			this.instructions.InsertRange(index, instructions);
			if (matchEnd >= index)
			{
				matchEnd += instructions.Length;
			}
			return this;
		}

		public ILInjector Insert(params CodeInstruction[] instructions)
		{
			InsertInPlace(instructions);
			index += instructions.Length;
			return this;
		}

		public ILInjector InsertInPlaceAfterBranch(params CodeInstruction[] instructions)
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			List<Label> labels = Instruction.labels;
			this.instructions.InsertRange(index, instructions);
			Instruction.labels.AddRange(labels);
			labels.Clear();
			if (matchEnd >= index)
			{
				matchEnd += instructions.Length;
			}
			return this;
		}

		public ILInjector InsertAfterBranch(params CodeInstruction[] instructions)
		{
			InsertInPlaceAfterBranch(instructions);
			index += instructions.Length;
			return this;
		}

		public ILInjector RemoveAllPreviousInstructions()
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			instructions.RemoveRange(0, index);
			matchEnd -= index;
			if (matchEnd < 0)
			{
				matchEnd = 0;
			}
			index = 0;
			return this;
		}

		public ILInjector Remove(int count = 1)
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid");
			}
			instructions.RemoveRange(index, count);
			if (matchEnd > index)
			{
				matchEnd = Math.Max(index, matchEnd - count);
			}
			return this;
		}

		public ILInjector RemoveLastMatch()
		{
			GetLastMatchRange(out var start, out var size);
			instructions.RemoveRange(start, size);
			index = start;
			matchEnd = start;
			return this;
		}

		public ILInjector ReplaceLastMatch(params CodeInstruction[] instructions)
		{
			RemoveLastMatch();
			Insert(instructions);
			return this;
		}

		public List<CodeInstruction> ReleaseInstructions()
		{
			List<CodeInstruction> result = instructions;
			instructions = null;
			return result;
		}

		public ILInjector PrintContext(int context, string header = "")
		{
			if (!IsValid)
			{
				throw new InvalidOperationException("Injector is invalid (" + header + ")");
			}
			StringBuilder stringBuilder = new StringBuilder(header);
			if (header.Length > 0)
			{
				stringBuilder.Append(':');
			}
			stringBuilder.AppendLine();
			GetLastMatchRangeAbsolute(out var start, out var end);
			int num = Math.Min(end + 1 + context, instructions.Count);
			for (int i = Math.Max(start - context, 0); i < num; i++)
			{
				if (end == -1 && i == index)
				{
					stringBuilder.Append("╶> ");
				}
				else
				{
					if (i >= start && i < end)
					{
						stringBuilder.Append("│");
					}
					else
					{
						stringBuilder.Append(" ");
					}
					if (i == index)
					{
						stringBuilder.Append("╶> ");
					}
					else
					{
						stringBuilder.Append("   ");
					}
				}
				stringBuilder.AppendLine($"{i}: {instructions[i]}");
			}
			Plugin.Log.LogInfo((object)stringBuilder);
			return this;
		}

		public ILInjector PrintContext(string header = "")
		{
			return PrintContext(4, header);
		}
	}
	public interface ILMatcher
	{
		private static OpCode[] branchInstructions = new OpCode[4]
		{
			OpCodes.Br,
			OpCodes.Br_S,
			OpCodes.Brfalse,
			OpCodes.Brfalse_S
		};

		bool Matches(CodeInstruction instruction);

		static NotMatcher Not(ILMatcher matcher)
		{
			return new NotMatcher(matcher);
		}

		static OpcodeMatcher Opcode(OpCode opcode)
		{
			return new OpcodeMatcher(opcode);
		}

		static OpcodesMatcher Opcodes(params OpCode[] opcodes)
		{
			return new OpcodesMatcher(opcodes);
		}

		static OpcodeOperandMatcher OpcodeOperand(OpCode opcode, object operand)
		{
			return new OpcodeOperandMatcher(opcode, operand);
		}

		static InstructionMatcher Instruction(CodeInstruction instruction)
		{
			return new InstructionMatcher(instruction);
		}

		static LdargMatcher Ldarg(int? arg = null)
		{
			return new LdargMatcher(arg);
		}

		static LdlocMatcher Ldloc(int? loc = null)
		{
			return new LdlocMatcher(loc);
		}

		static StlocMatcher Stloc(int? loc = null)
		{
			return new StlocMatcher(loc);
		}

		static LdcI32Matcher Ldc(int? value = null)
		{
			return new LdcI32Matcher(value);
		}

		static BranchMatcher Branch()
		{
			return new BranchMatcher();
		}

		static OpcodeOperandMatcher Ldfld(FieldInfo field)
		{
			if (field == null)
			{
				Plugin.Log.LogWarning((object)$"Field passed to ILMatcher.Ldfld() was null\n{new StackTrace()}");
			}
			return new OpcodeOperandMatcher(OpCodes.Ldfld, field);
		}

		static OpcodeOperandMatcher Ldsfld(FieldInfo field)
		{
			if (field == null)
			{
				Plugin.Log.LogWarning((object)$"Field passed to ILMatcher.Ldsfld() was null\n{new StackTrace()}");
			}
			return new OpcodeOperandMatcher(OpCodes.Ldsfld, field);
		}

		static OpcodeOperandMatcher Stfld(FieldInfo field)
		{
			if (field == null)
			{
				Plugin.Log.LogWarning((object)$"Field passed to ILMatcher.Stfld() was null\n{new StackTrace()}");
			}
			return new OpcodeOperandMatcher(OpCodes.Stfld, field);
		}

		static OpcodeOperandMatcher Stsfld(FieldInfo field)
		{
			if (field == null)
			{
				Plugin.Log.LogWarning((object)$"Field passed to ILMatcher.Stsfld() was null\n{new StackTrace()}");
			}
			return new OpcodeOperandMatcher(OpCodes.Stsfld, field);
		}

		static OpcodeOperandMatcher Callvirt(MethodBase method)
		{
			if (method == null)
			{
				Plugin.Log.LogWarning((object)$"Method passed to ILMatcher.Callvirt() was null\n{new StackTrace()}");
			}
			return OpcodeOperand(OpCodes.Callvirt, method);
		}

		static OpcodeOperandMatcher Call(MethodBase method)
		{
			if (method == null)
			{
				Plugin.Log.LogWarning((object)$"Method passed to ILMatcher.Call() was null\n{new StackTrace()}");
			}
			return OpcodeOperand(OpCodes.Call, method);
		}

		static PredicateMatcher Predicate(Func<CodeInstruction, bool> predicate)
		{
			return new PredicateMatcher(predicate);
		}

		static PredicateMatcher Predicate(Func<FieldInfo, bool> predicate)
		{
			return new PredicateMatcher((CodeInstruction insn) => insn.operand is FieldInfo arg && predicate(arg));
		}
	}
	public class NotMatcher : ILMatcher
	{
		private readonly ILMatcher matcher;

		public NotMatcher(ILMatcher matcher)
		{
			this.matcher = matcher;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return !matcher.Matches(instruction);
		}
	}
	public class OpcodeMatcher : ILMatcher
	{
		private readonly OpCode opcode;

		public OpcodeMatcher(OpCode opcode)
		{
			this.opcode = opcode;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return instruction.opcode == opcode;
		}
	}
	public class OpcodesMatcher : ILMatcher
	{
		private readonly OpCode[] opcodes;

		public OpcodesMatcher(OpCode[] opcodes)
		{
			this.opcodes = opcodes;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return opcodes.Contains(instruction.opcode);
		}
	}
	public class OpcodeOperandMatcher : ILMatcher
	{
		private readonly OpCode opcode;

		private readonly object operand;

		public OpcodeOperandMatcher(OpCode opcode, object operand)
		{
			this.opcode = opcode;
			this.operand = operand;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return instruction.opcode == opcode && instruction.operand == operand;
		}
	}
	public class InstructionMatcher : ILMatcher
	{
		private readonly OpCode opcode = instruction.opcode;

		private readonly object operand = instruction.operand;

		private readonly Label[] labels = instruction.labels.ToArray();

		public InstructionMatcher(CodeInstruction instruction)
		{
		}

		public bool Matches(CodeInstruction instruction)
		{
			if (instruction.opcode != opcode)
			{
				return false;
			}
			if (instruction.operand != operand)
			{
				return false;
			}
			if (instruction.labels.Count != labels.Length)
			{
				return false;
			}
			for (int i = 0; i < labels.Length; i++)
			{
				if (labels[i] != instruction.labels[i])
				{
					return false;
				}
			}
			return true;
		}
	}
	public class LdargMatcher : ILMatcher
	{
		private readonly int? arg;

		public LdargMatcher(int? arg)
		{
			this.arg = arg;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return arg.HasValue ? (instruction.GetLdargIndex() == arg) : instruction.GetLdargIndex().HasValue;
		}
	}
	public class LdlocMatcher : ILMatcher
	{
		private readonly int? loc;

		public LdlocMatcher(int? loc)
		{
			this.loc = loc;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return loc.HasValue ? (instruction.GetLdlocIndex() == loc) : instruction.GetLdlocIndex().HasValue;
		}
	}
	public class StlocMatcher : ILMatcher
	{
		private readonly int? loc;

		public StlocMatcher(int? loc)
		{
			this.loc = loc;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return loc.HasValue ? (instruction.GetStlocIndex() == loc) : instruction.GetStlocIndex().HasValue;
		}
	}
	public class LdcI32Matcher : ILMatcher
	{
		private readonly int? value;

		public LdcI32Matcher(int? value)
		{
			this.value = value;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return (!value.HasValue && instruction.GetLdcI32().HasValue) || instruction.GetLdcI32() == value;
		}
	}
	public class BranchMatcher : ILMatcher
	{
		public bool Matches(CodeInstruction instruction)
		{
			Label? label = default(Label?);
			return CodeInstructionExtensions.Branches(instruction, ref label);
		}
	}
	public class PredicateMatcher : ILMatcher
	{
		private readonly Func<CodeInstruction, bool> predicate;

		public PredicateMatcher(Func<CodeInstruction, bool> predicate)
		{
			this.predicate = predicate;
			base..ctor();
		}

		public bool Matches(CodeInstruction instruction)
		{
			return predicate(instruction);
		}
	}
	internal static class InstructionUtilities
	{
		public static CodeInstruction MakeLdarg(int index)
		{
			//IL_007b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0081: Expected O, but got Unknown
			//IL_002b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0031: Expected O, but got Unknown
			//IL_0039: Unknown result type (might be due to invalid IL or missing references)
			//IL_003f: Expected O, but got Unknown
			//IL_0047: Unknown result type (might be due to invalid IL or missing references)
			//IL_004d: Expected O, but got Unknown
			//IL_0055: Unknown result type (might be due to invalid IL or missing references)
			//IL_005b: Expected O, but got Unknown
			//IL_0068: Unknown result type (might be due to invalid IL or missing references)
			//IL_006e: Expected O, but got Unknown
			if (1 == 0)
			{
			}
			CodeInstruction result = (CodeInstruction)((index >= 256) ? ((object)new CodeInstruction(OpCodes.Ldarg, (object)index)) : (index switch
			{
				0 => (object)new CodeInstruction(OpCodes.Ldarg_0, (object)null), 
				1 => (object)new CodeInstruction(OpCodes.Ldarg_1, (object)null), 
				2 => (object)new CodeInstruction(OpCodes.Ldarg_2, (object)null), 
				3 => (object)new CodeInstruction(OpCodes.Ldarg_3, (object)null), 
				_ => (object)new CodeInstruction(OpCodes.Ldarg_S, (object)index), 
			}));
			if (1 == 0)
			{
			}
			return result;
		}

		public static int PopCount(this CodeInstruction instruction)
		{
			if (instruction.opcode == OpCodes.Call || instruction.opcode == OpCodes.Callvirt)
			{
				MethodInfo methodInfo = (MethodInfo)instruction.operand;
				int num = methodInfo.GetParameters().Length;
				if (!methodInfo.IsStatic)
				{
					num++;
				}
				return num;
			}
			if (instruction.opcode == OpCodes.Ret)
			{
				return 1;
			}
			StackBehaviour stackBehaviourPop = instruction.opcode.StackBehaviourPop;
			if (1 == 0)
			{
			}
			int result = stackBehaviourPop switch
			{
				StackBehaviour.Pop0 => 0, 
				StackBehaviour.Pop1 => 1, 
				StackBehaviour.Pop1_pop1 => 2, 
				StackBehaviour.Popi => 1, 
				StackBehaviour.Popi_pop1 => 2, 
				StackBehaviour.Popi_popi => 2, 
				StackBehaviour.Popi_popi8 => 2, 
				StackBehaviour.Popi_popi_popi => 3, 
				StackBehaviour.Popi_popr4 => 2, 
				StackBehaviour.Popi_popr8 => 2, 
				StackBehaviour.Popref => 1, 
				StackBehaviour.Popref_pop1 => 2, 
				StackBehaviour.Popref_popi => 2, 
				StackBehaviour.Popref_popi_popi => 3, 
				StackBehaviour.Popref_popi_popi8 => 3, 
				StackBehaviour.Popref_popi_popr4 => 3, 
				StackBehaviour.Popref_popi_popr8 => 3, 
				StackBehaviour.Popref_popi_popref => 3, 
				StackBehaviour.Varpop => throw new NotImplementedException($"Variable pop on non-call instruction '{instruction}'"), 
				StackBehaviour.Popref_popi_pop1 => 3, 
				_ => throw new NotSupportedException($"StackBehaviourPop of {instruction.opcode.StackBehaviourPop} was not a pop for instruction '{instruction}'"), 
			};
			if (1 == 0)
			{
			}
			return result;
		}

		public static int PushCount(this CodeInstruction instruction)
		{
			if (instruction.opcode == OpCodes.Call || instruction.opcode == OpCodes.Callvirt)
			{
				MethodInfo methodInfo = (MethodInfo)instruction.operand;
				if (methodInfo.ReturnType == typeof(void))
				{
					return 0;
				}
				return 1;
			}
			StackBehaviour stackBehaviourPush = instruction.opcode.StackBehaviourPush;
			if (1 == 0)
			{
			}
			int result = stackBehaviourPush switch
			{
				StackBehaviour.Push0 => 0, 
				StackBehaviour.Push1 => 1, 
				StackBehaviour.Push1_push1 => 2, 
				StackBehaviour.Pushi => 1, 
				StackBehaviour.Pushi8 => 1, 
				StackBehaviour.Pushr4 => 1, 
				StackBehaviour.Pushr8 => 1, 
				StackBehaviour.Pushref => 1, 
				StackBehaviour.Varpush => throw new NotImplementedException($"Variable push on non-call instruction '{instruction}'"), 
				_ => throw new NotSupportedException($"StackBehaviourPush of {instruction.opcode.StackBehaviourPush} was not a push for instruction '{instruction}'"), 
			};
			if (1 == 0)
			{
			}
			return result;
		}

		public static int? GetLdargIndex(this CodeInstruction instruction)
		{
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Ldarg_0)
			{
				return 0;
			}
			if (opcode == OpCodes.Ldarg_1)
			{
				return 1;
			}
			if (opcode == OpCodes.Ldarg_2)
			{
				return 2;
			}
			if (opcode == OpCodes.Ldarg_3)
			{
				return 3;
			}
			if (opcode == OpCodes.Ldarg || opcode == OpCodes.Ldarg_S)
			{
				return instruction.operand as int?;
			}
			return null;
		}

		public static int? GetLdlocIndex(this CodeInstruction instruction)
		{
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Ldloc_0)
			{
				return 0;
			}
			if (opcode == OpCodes.Ldloc_1)
			{
				return 1;
			}
			if (opcode == OpCodes.Ldloc_2)
			{
				return 2;
			}
			if (opcode == OpCodes.Ldloc_3)
			{
				return 3;
			}
			if (opcode == OpCodes.Ldloc || opcode == OpCodes.Ldloc_S)
			{
				return (instruction.operand as LocalBuilder)?.LocalIndex;
			}
			return null;
		}

		public static int? GetStlocIndex(this CodeInstruction instruction)
		{
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Stloc_0)
			{
				return 0;
			}
			if (opcode == OpCodes.Stloc_1)
			{
				return 1;
			}
			if (opcode == OpCodes.Stloc_2)
			{
				return 2;
			}
			if (opcode == OpCodes.Stloc_3)
			{
				return 3;
			}
			if (opcode == OpCodes.Stloc || opcode == OpCodes.Stloc_S)
			{
				return (instruction.operand as LocalBuilder)?.LocalIndex;
			}
			return null;
		}

		public static CodeInstruction LdlocToStloc(this CodeInstruction instruction)
		{
			//IL_001d: Unknown result type (might be due to invalid IL or missing references)
			//IL_0023: Expected O, but got Unknown
			//IL_003d: Unknown result type (might be due to invalid IL or missing references)
			//IL_0043: Expected O, but got Unknown
			//IL_005c: Unknown result type (might be due to invalid IL or missing references)
			//IL_0062: Expected O, but got Unknown
			//IL_007b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0081: Expected O, but got Unknown
			//IL_00af: Unknown result type (might be due to invalid IL or missing references)
			//IL_00b5: Expected O, but got Unknown
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Ldloc_0)
			{
				return new CodeInstruction(OpCodes.Stloc_0, (object)null);
			}
			if (opcode == OpCodes.Ldloc_1)
			{
				return new CodeInstruction(OpCodes.Stloc_1, (object)null);
			}
			if (opcode == OpCodes.Ldloc_2)
			{
				return new CodeInstruction(OpCodes.Stloc_2, (object)null);
			}
			if (opcode == OpCodes.Ldloc_3)
			{
				return new CodeInstruction(OpCodes.Stloc_3, (object)null);
			}
			if (opcode == OpCodes.Ldloc || opcode == OpCodes.Ldloc_S)
			{
				return new CodeInstruction(OpCodes.Stloc, instruction.operand);
			}
			return null;
		}

		public static CodeInstruction StlocToLdloc(this CodeInstruction instruction)
		{
			//IL_001d: Unknown result type (might be due to invalid IL or missing references)
			//IL_0023: Expected O, but got Unknown
			//IL_003d: Unknown result type (might be due to invalid IL or missing references)
			//IL_0043: Expected O, but got Unknown
			//IL_005c: Unknown result type (might be due to invalid IL or missing references)
			//IL_0062: Expected O, but got Unknown
			//IL_007b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0081: Expected O, but got Unknown
			//IL_00af: Unknown result type (might be due to invalid IL or missing references)
			//IL_00b5: Expected O, but got Unknown
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Stloc_0)
			{
				return new CodeInstruction(OpCodes.Ldloc_0, (object)null);
			}
			if (opcode == OpCodes.Stloc_1)
			{
				return new CodeInstruction(OpCodes.Ldloc_1, (object)null);
			}
			if (opcode == OpCodes.Stloc_2)
			{
				return new CodeInstruction(OpCodes.Ldloc_2, (object)null);
			}
			if (opcode == OpCodes.Stloc_3)
			{
				return new CodeInstruction(OpCodes.Ldloc_3, (object)null);
			}
			if (opcode == OpCodes.Stloc || opcode == OpCodes.Stloc_S)
			{
				return new CodeInstruction(OpCodes.Ldloc, instruction.operand);
			}
			return null;
		}

		public static int? GetLdcI32(this CodeInstruction instruction)
		{
			OpCode opcode = instruction.opcode;
			if (opcode == OpCodes.Ldc_I4_M1)
			{
				return -1;
			}
			if (opcode == OpCodes.Ldc_I4_0)
			{
				return 0;
			}
			if (opcode == OpCodes.Ldc_I4_1)
			{
				return 1;
			}
			if (opcode == OpCodes.Ldc_I4_2)
			{
				return 2;
			}
			if (opcode == OpCodes.Ldc_I4_3)
			{
				return 3;
			}
			if (opcode == OpCodes.Ldc_I4_4)
			{
				return 4;
			}
			if (opcode == OpCodes.Ldc_I4_5)
			{
				return 5;
			}
			if (opcode == OpCodes.Ldc_I4_6)
			{
				return 6;
			}
			if (opcode == OpCodes.Ldc_I4_7)
			{
				return 7;
			}
			if (opcode == OpCodes.Ldc_I4_8)
			{
				return 8;
			}
			if (opcode == OpCodes.Ldc_I4_S)
			{
				return instruction.operand as sbyte?;
			}
			if (opcode == OpCodes.Ldc_I4)
			{
				return instruction.operand as int?;
			}
			return null;
		}
	}
}
namespace UnityMeshSimplifier
{
	[Serializable]
	[StructLayout(LayoutKind.Auto)]
	public struct BlendShape
	{
		public string ShapeName;

		public BlendShapeFrame[] Frames;

		public BlendShape(string shapeName, BlendShapeFrame[] frames)
		{
			ShapeName = shapeName;
			Frames = frames;
		}
	}
	[Serializable]
	[StructLayout(LayoutKind.Auto)]
	public struct BlendShapeFrame
	{
		public float FrameWeight;

		public Vector3[] DeltaVertices;

		public Vector3[] DeltaNormals;

		public Vector3[] DeltaTangents;

		public BlendShapeFrame(float frameWeight, Vector3[] deltaVertices, Vector3[] deltaNormals, Vector3[] deltaTangents)
		{
			FrameWeight = frameWeight;
			DeltaVertices = deltaVertices;
			DeltaNormals = deltaNormals;
			DeltaTangents = deltaTangents;
		}
	}
	[AddComponentMenu("")]
	internal class LODBackupComponent : MonoBehaviour
	{
		[SerializeField]
		private Renderer[] originalRenderers = null;

		public Renderer[] OriginalRenderers
		{
			get
			{
				return originalRenderers;
			}
			set
			{
				originalRenderers = value;
			}
		}
	}
	[AddComponentMenu("Rendering/LOD Generator Helper")]
	public sealed class LODGeneratorHelper : MonoBehaviour
	{
		[SerializeField]
		[Tooltip("The fade mode used by the created LOD group.")]
		private LODFadeMode fadeMode = (LODFadeMode)0;

		[SerializeField]
		[Tooltip("If the cross-fading should be animated by time.")]
		private bool animateCrossFading = false;

		[SerializeField]
		[Tooltip("If the renderers under this game object and any children should be automatically collected.")]
		private bool autoCollectRenderers = true;

		[SerializeField]
		[Tooltip("The simplification options.")]
		private SimplificationOptions simplificationOptions = SimplificationOptions.Default;

		[SerializeField]
		[Tooltip("The path within the assets directory to save the generated assets. Leave this empty to use the default path.")]
		private string saveAssetsPath = string.Empty;

		[SerializeField]
		[Tooltip("The LOD levels.")]
		private LODLevel[] levels = null;

		[SerializeField]
		private bool isGenerated = false;

		public LODFadeMode FadeMode
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return fadeMode;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				fadeMode = value;
			}
		}

		public bool AnimateCrossFading
		{
			get
			{
				return animateCrossFading;
			}
			set
			{
				animateCrossFading = value;
			}
		}

		public bool AutoCollectRenderers
		{
			get
			{
				return autoCollectRenderers;
			}
			set
			{
				autoCollectRenderers = value;
			}
		}

		public SimplificationOptions SimplificationOptions
		{
			get
			{
				return simplificationOptions;
			}
			set
			{
				simplificationOptions = value;
			}
		}

		public string SaveAssetsPath
		{
			get
			{
				return saveAssetsPath;
			}
			set
			{
				saveAssetsPath = value;
			}
		}

		public LODLevel[] Levels
		{
			get
			{
				return levels;
			}
			set
			{
				levels = value;
			}
		}

		public bool IsGenerated => isGenerated;

		private void Reset()
		{
			//IL_0003: Unknown result type (might be due to invalid IL or missing references)
			fadeMode = (LODFadeMode)0;
			animateCrossFading = false;
			autoCollectRenderers = true;
			simplificationOptions = SimplificationOptions.Default;
			levels = new LODLevel[3]
			{
				new LODLevel(0.5f, 1f)
				{
					CombineMeshes = false,
					CombineSubMeshes = false,
					SkinQuality = (SkinQuality)0,
					ShadowCastingMode = (ShadowCastingMode)1,
					ReceiveShadows = true,
					SkinnedMotionVectors = true,
					LightProbeUsage = (LightProbeUsage)1,
					ReflectionProbeUsage = (ReflectionProbeUsage)1
				},
				new LODLevel(0.17f, 0.65f)
				{
					CombineMeshes = true,
					CombineSubMeshes = false,
					SkinQuality = (SkinQuality)0,
					ShadowCastingMode = (ShadowCastingMode)1,
					ReceiveShadows = true,
					SkinnedMotionVectors = true,
					LightProbeUsage = (LightProbeUsage)1,
					ReflectionProbeUsage = (ReflectionProbeUsage)3
				},
				new LODLevel(0.02f, 0.4225f)
				{
					CombineMeshes = true,
					CombineSubMeshes = true,
					SkinQuality = (SkinQuality)2,
					ShadowCastingMode = (ShadowCastingMode)0,
					ReceiveShadows = false,
					SkinnedMotionVectors = false,
					LightProbeUsage = (LightProbeUsage)0,
					ReflectionProbeUsage = (ReflectionProbeUsage)0
				}
			};
		}
	}
	public sealed class ValidateSimplificationOptionsException : Exception
	{
		private readonly string propertyName;

		public string PropertyName => propertyName;

		public override string Message => base.Message + Environment.NewLine + "Property name: " + propertyName;

		public ValidateSimplificationOptionsException(string propertyName, string message)
			: base(message)
		{
			this.propertyName = propertyName;
		}

		public ValidateSimplificationOptionsException(string propertyName, string message, Exception innerException)
			: base(message, innerException)
		{
			this.propertyName = propertyName;
		}
	}
	public static class LODGenerator
	{
		private struct RendererInfo
		{
			public string name;

			public bool isStatic;

			public bool isNewMesh;

			public Transform transform;

			public Mesh mesh;

			public Material[] materials;

			public Transform rootBone;

			public Transform[] bones;
		}

		public static readonly string LODParentGameObjectName = "_UMS_LODs_";

		public static readonly string LODAssetDefaultParentPath = "Assets/UMS_LODs/";

		public static readonly string AssetsRootPath = "Assets/";

		public static readonly string LODAssetUserData = "UnityMeshSimplifierLODAsset";

		public static LODGroup GenerateLODs(LODGeneratorHelper generatorHelper)
		{
			//IL_006f: Unknown result type (might be due to invalid IL or missing references)
			if ((Object)(object)generatorHelper == (Object)null)
			{
				throw new ArgumentNullException("generatorHelper");
			}
			GameObject gameObject = ((Component)generatorHelper).gameObject;
			LODLevel[] levels = generatorHelper.Levels;
			bool autoCollectRenderers = generatorHelper.AutoCollectRenderers;
			SimplificationOptions simplificationOptions = generatorHelper.SimplificationOptions;
			string saveAssetsPath = generatorHelper.SaveAssetsPath;
			LODGroup val = GenerateLODs(gameObject, levels, autoCollectRenderers, simplificationOptions, saveAssetsPath);
			if ((Object)(object)val == (Object)null)
			{
				return null;
			}
			val.animateCrossFading = generatorHelper.AnimateCrossFading;
			val.fadeMode = generatorHelper.FadeMode;
			return val;
		}

		public static LODGroup GenerateLODs(GameObject gameObject, LODLevel[] levels, bool autoCollectRenderers, SimplificationOptions simplificationOptions, Transform root = null)
		{
			return GenerateLODs(gameObject, levels, autoCollectRenderers, simplificationOptions, null, root);
		}

		public static LODGroup GenerateLODs(GameObject gameObject, LODLevel[] levels, bool autoCollectRenderers, SimplificationOptions simplificationOptions, string saveAssetsPath, Transform root = null)
		{
			//IL_00a0: Unknown result type (might be due to invalid IL or missing references)
			//IL_00a6: Expected O, but got Unknown
			//IL_0114: Unknown result type (might be due to invalid IL or missing references)
			//IL_011b: Expected O, but got Unknown
			//IL_0171: Unknown result type (might be due to invalid IL or missing references)
			//IL_0176: Unknown result type (might be due to invalid IL or missing references)
			//IL_0398: Unknown result type (might be due to invalid IL or missing references)
			//IL_039d: Unknown result type (might be due to invalid IL or missing references)
			if ((Object)(object)gameObject == (Object)null)
			{
				throw new ArgumentNullException("gameObject");
			}
			if (levels == null)
			{
				throw new ArgumentNullException("levels");
			}
			Transform val = gameObject.transform;
			if ((Object)(object)root != (Object)null)
			{
				val = root;
			}
			Transform val2 = val.Find(LODParentGameObjectName);
			if ((Object)(object)val2 != (Object)null)
			{
				throw new InvalidOperationException("The game object already appears to have LODs. Please remove them first.");
			}
			LODGroup component = gameObject.GetComponent<LODGroup>();
			if ((Object)(object)component != (Object)null)
			{
				throw new InvalidOperationException("The game object already appears to have a LOD Group. Please remove it first.");
			}
			MeshSimplifier.ValidateOptions(simplificationOptions);
			saveAssetsPath = ValidateSaveAssetsPath(saveAssetsPath);
			GameObject val3 = new GameObject(LODParentGameObjectName);
			Transform transform = val3.transform;
			ParentAndResetTransform(transform, val);
			LODGroup val4 = gameObject.AddComponent<LODGroup>();
			Renderer[] array = null;
			if (autoCollectRenderers)
			{
				array = GetChildRenderersForLOD(gameObject);
			}
			List<Renderer> list = new List<Renderer>((array != null) ? array.Length : 10);
			LOD[] array2 = (LOD[])(object)new LOD[levels.Length];
			for (int i = 0; i < levels.Length; i++)
			{
				LODLevel level = levels[i];
				GameObject val5 = new GameObject($"Level{i:00}");
				Transform transform2 = val5.transform;
				ParentAndResetTransform(transform2, transform);
				Renderer[] array3 = array ?? level.Renderers;
				List<Renderer> list2 = new List<Renderer>((array3 != null) ? array3.Length : 0);
				if (level.Quality == 1f)
				{
					array2[i] = new LOD(level.ScreenRelativeTransitionHeight, array3);
					continue;
				}
				if (array3 != null && array3.Length != 0)
				{
					MeshRenderer[] renderers = (from renderer in array3
						let meshFilter = ((Component)renderer).GetComponent<MeshFilter>()
						where renderer.enabled && (Object)/*isinst with value type is only supported in some contexts*/ != (Object)null && (Object)(object)meshFilter != (Object)null && (Object)(object)meshFilter.sharedMesh != (Object)null
						select <>h__TransparentIdentifier0).Select(<>h__TransparentIdentifier0 =>
					{
						Renderer renderer4 = <>h__TransparentIdentifier0.renderer;
						return (MeshRenderer)(object)((renderer4 is MeshRenderer) ? renderer4 : null);
					}).ToArray();
					SkinnedMeshRenderer[] renderers2 = (from renderer in array3
						where renderer.enabled && (Object)(object)((renderer is SkinnedMeshRenderer) ? renderer : null) != (Object)null && (Object)(object)((SkinnedMeshRenderer)((renderer is SkinnedMeshRenderer) ? renderer : null)).sharedMesh != (Object)null
						select (SkinnedMeshRenderer)(object)((renderer is SkinnedMeshRenderer) ? renderer : null)).ToArray();
					RendererInfo[] array4 = null;
					RendererInfo[] array5 = null;
					if (level.CombineMeshes)
					{
						array4 = CombineStaticMeshes(val, i, renderers);
						array5 = CombineSkinnedMeshes(val, i, renderers2);
					}
					else
					{
						array4 = GetStaticRenderers(renderers);
						array5 = GetSkinnedRenderers(renderers2);
					}
					if (array4 != null)
					{
						for (int j = 0; j < array4.Length; j++)
						{
							RendererInfo renderer2 = array4[j];
							Renderer item = CreateLevelRenderer(gameObject, i, in level, transform2, j, in renderer2, in simplificationOptions, saveAssetsPath);
							list2.Add(item);
						}
					}
					if (array5 != null)
					{
						for (int k = 0; k < array5.Length; k++)
						{
							RendererInfo renderer3 = array5[k];
							Renderer item2 = CreateLevelRenderer(gameObject, i, in level, transform2, k, in renderer3, in simplificationOptions, saveAssetsPath);
							list2.Add(item2);
						}
					}
					Renderer[] array6 = array3;
					foreach (Renderer item3 in array6)
					{
						if (!list.Contains(item3))
						{
							list.Add(item3);
						}
					}
				}
				array2[i] = new LOD(level.ScreenRelativeTransitionHeight, list2.ToArray());
			}
			CreateBackup(gameObject, list.ToArray());
			val4.animateCrossFading = false;
			val4.SetLODs(array2);
			return val4;
		}

		public static bool DestroyLODs(LODGeneratorHelper generatorHelper)
		{
			if ((Object)(object)generatorHelper == (Object)null)
			{
				throw new ArgumentNullException("generatorHelper");
			}
			return DestroyLODs(((Component)generatorHelper).gameObject);
		}

		public static bool DestroyLODs(GameObject gameObject)
		{
			if ((Object)(object)gameObject == (Object)null)
			{
				throw new ArgumentNullException("gameObject");
			}
			RestoreBackup(gameObject);
			Transform transform = gameObject.transform;
			Transform val = transform.Find(LODParentGameObjectName);
			if ((Object)(object)val == (Object)null)
			{
				return false;
			}
			DestroyObject((Object)(object)((Component)val).gameObject);
			LODGroup component = gameObject.GetComponent<LODGroup>();
			if ((Object)(object)component != (Object)null)
			{
				DestroyObject((Object)(object)component);
			}
			return true;
		}

		private static RendererInfo[] GetStaticRenderers(MeshRenderer[] renderers)
		{
			List<RendererInfo> list = new List<RendererInfo>(renderers.Length);
			foreach (MeshRenderer val in renderers)
			{
				MeshFilter component = ((Component)val).GetComponent<MeshFilter>();
				if ((Object)(object)component == (Object)null)
				{
					Debug.LogWarning((object)"A renderer was missing a mesh filter and was ignored.", (Object)(object)val);
					continue;
				}
				Mesh sharedMesh = component.sharedMesh;
				if ((Object)(object)sharedMesh == (Object)null)
				{
					Debug.LogWarning((object)"A renderer was missing a mesh and was ignored.", (Object)(object)val);
					continue;
				}
				list.Add(new RendererInfo
				{
					name = ((Object)val).name,
					isStatic = true,
					isNewMesh = false,
					transform = ((Component)val).transform,
					mesh = sharedMesh,
					materials = ((Renderer)val).sharedMaterials
				});
			}
			return list.ToArray();
		}

		private static RendererInfo[] GetSkinnedRenderers(SkinnedMeshRenderer[] renderers)
		{
			List<RendererInfo> list = new List<RendererInfo>(renderers.Length);
			foreach (SkinnedMeshRenderer val in renderers)
			{
				Mesh sharedMesh = val.sharedMesh;
				if ((Object)(object)sharedMesh == (Object)null)
				{
					Debug.LogWarning((object)"A renderer was missing a mesh and was ignored.", (Object)(object)val);
					continue;
				}
				list.Add(new RendererInfo
				{
					name = ((Object)val).name,
					isStatic = false,
					isNewMesh = false,
					transform = ((Component)val).transform,
					mesh = sharedMesh,
					materials = ((Renderer)val).sharedMaterials,
					rootBone = val.rootBone,
					bones = val.bones
				});
			}
			return list.ToArray();
		}

		private static RendererInfo[] CombineStaticMeshes(Transform transform, int levelIndex, MeshRenderer[] renderers)
		{
			if (renderers.Length == 0)
			{
				return null;
			}
			List<RendererInfo> list = new List<RendererInfo>(renderers.Length);
			Material[] resultMaterials;
			Mesh val = MeshCombiner.CombineMeshes(transform, renderers, out resultMaterials);
			((Object)val).name = $"{((Object)transform).name}_static{levelIndex:00}";
			string name = $"{((Object)transform).name}_combined_static";
			list.Add(new RendererInfo
			{
				name = name,
				isStatic = true,
				isNewMesh = true,
				transform = null,
				mesh = val,
				materials = resultMaterials,
				rootBone = null,
				bones = null
			});
			return list.ToArray();
		}

		private static RendererInfo[] CombineSkinnedMeshes(Transform transform, int levelIndex, SkinnedMeshRenderer[] renderers)
		{
			if (renderers.Length == 0)
			{
				return null;
			}
			List<RendererInfo> list = new List<RendererInfo>(renderers.Length);
			IEnumerable<SkinnedMeshRenderer> enumerable = renderers.Where((SkinnedMeshRenderer renderer) => (Object)(object)renderer.sharedMesh != (Object)null && renderer.sharedMesh.blendShapeCount > 0);
			IEnumerable<SkinnedMeshRenderer> enumerable2 = renderers.Where((SkinnedMeshRenderer renderer) => (Object)(object)renderer.sharedMesh == (Object)null);
			SkinnedMeshRenderer[] array = renderers.Where((SkinnedMeshRenderer renderer) => (Object)(object)renderer.sharedMesh != (Object)null && renderer.sharedMesh.blendShapeCount == 0).ToArray();
			foreach (SkinnedMeshRenderer item in enumerable2)
			{
				Debug.LogWarning((object)"A renderer was missing a mesh and was ignored.", (Object)(object)item);
			}
			foreach (SkinnedMeshRenderer item2 in enumerable)
			{
				list.Add(new RendererInfo
				{
					name = ((Object)item2).name,
					isStatic = false,
					isNewMesh = false,
					transform = ((Component)item2).transform,
					mesh = item2.sharedMesh,
					materials = ((Renderer)item2).sharedMaterials,
					rootBone = item2.rootBone,
					bones = item2.bones
				});
			}
			if (array.Length != 0)
			{
				Material[] resultMaterials;
				Transform[] resultBones;
				Mesh val = MeshCombiner.CombineMeshes(transform, array, out resultMaterials, out resultBones);
				((Object)val).name = $"{((Object)transform).name}_skinned{levelIndex:00}";
				Transform rootBone = FindBestRootBone(transform, array);
				string name = $"{((Object)transform).name}_combined_skinned";
				list.Add(new RendererInfo
				{
					name = name,
					isStatic = false,
					isNewMesh = false,
					transform = null,
					mesh = val,
					materials = resultMaterials,
					rootBone = rootBone,
					bones = resultBones
				});
			}
			return list.ToArray();
		}

		private static void ParentAndResetTransform(Transform transform, Transform parentTransform)
		{
			//IL_000a: Unknown result type (might be due to invalid IL or missing references)
			//IL_0016: Unknown result type (might be due to invalid IL or missing references)
			//IL_0022: Unknown result type (might be due to invalid IL or missing references)
			transform.SetParent(parentTransform);
			transform.localPosition = Vector3.zero;
			transform.localRotation = Quaternion.identity;
			transform.localScale = Vector3.one;
		}

		private static void ParentAndOffsetTransform(Transform transform, Transform parentTransform, Transform originalTransform)
		{
			//IL_0003: Unknown result type (might be due to invalid IL or missing references)
			//IL_0010: Unknown result type (might be due to invalid IL or missing references)
			//IL_001d: Unknown result type (might be due to invalid IL or missing references)
			transform.position = originalTransform.position;
			transform.rotation = originalTransform.rotation;
			transform.localScale = originalTransform.lossyScale;
			transform.SetParent(parentTransform, true);
		}

		private static Renderer CreateLevelRenderer(GameObject gameObject, int levelIndex, in LODLevel level, Transform levelTransform, int rendererIndex, in RendererInfo renderer, in SimplificationOptions simplificationOptions, string saveAssetsPath)
		{
			Mesh val = renderer.mesh;
			if (level.Quality < 1f && Config.generateLODMeshes.Value)
			{
				MeshInfo meshInfo = new MeshInfo(val);
				meshInfo.name = ((Object)val).name + "LOD" + levelIndex;
				if (MeshService.lodMeshDict.TryGetValue(meshInfo, out var value))
				{
					val = value;
				}
				else
				{
					val = SimplifyMesh(val, level.Quality, in simplificationOptions);
					((Object)val).name = ((Object)val).name + "LOD" + levelIndex;
					val.UploadMeshData(true);
					MeshService.lodMeshDict.Add(meshInfo, val);
				}
				if (renderer.isNewMesh)
				{
					DestroyObject((Object)(object)renderer.mesh);
				}
			}
			if (renderer.isStatic)
			{
				string name = $"{rendererIndex:000}_static_{renderer.name}";
				return (Renderer)(object)CreateStaticLevelRenderer(name, levelTransform, renderer.transform, val, renderer.materials, in level);
			}
			string name2 = $"{rendererIndex:000}_skinned_{renderer.name}";
			return (Renderer)(object)CreateSkinnedLevelRenderer(name2, levelTransform, renderer.transform, val, renderer.materials, renderer.rootBone, renderer.bones, in level);
		}

		private static MeshRenderer CreateStaticLevelRenderer(string name, Transform parentTransform, Transform originalTransform, Mesh mesh, Material[] materials, in LODLevel level)
		{
			//IL_0022: Unknown result type (might be due to invalid IL or missing references)
			//IL_0028: Expected O, but got Unknown
			GameObject val = new GameObject(name, new Type[2]
			{
				typeof(MeshFilter),
				typeof(MeshRenderer)
			});
			Transform transform = val.transform;
			if ((Object)(object)originalTransform != (Object)null)
			{
				ParentAndOffsetTransform(transform, parentTransform, originalTransform);
			}
			else
			{
				ParentAndResetTransform(transform, parentTransform);
			}
			MeshFilter component = val.GetComponent<MeshFilter>();
			component.sharedMesh = mesh;
			MeshRenderer component2 = val.GetComponent<MeshRenderer>();
			((Renderer)component2).sharedMaterials = materials;
			SetupLevelRenderer((Renderer)(object)component2, in level);
			return component2;
		}

		private static SkinnedMeshRenderer CreateSkinnedLevelRenderer(string name, Transform parentTransform, Transform originalTransform, Mesh mesh, Material[] materials, Transform rootBone, Transform[] bones, in LODLevel level)
		{
			//IL_0015: Unknown result type (might be due to invalid IL or missing references)
			//IL_001b: Expected O, but got Unknown
			GameObject val = new GameObject(name, new Type[1] { typeof(SkinnedMeshRenderer) });
			Transform transform = val.transform;
			if ((Object)(object)originalTransform != (Object)null)
			{
				ParentAndOffsetTransform(transform, parentTransform, originalTransform);
			}
			else
			{
				ParentAndResetTransform(transform, parentTransform);
			}
			SkinnedMeshRenderer component = val.GetComponent<SkinnedMeshRenderer>();
			component.sharedMesh = mesh;
			((Renderer)component).sharedMaterials = materials;
			component.rootBone = rootBone;
			component.bones = bones;
			SetupLevelRenderer((Renderer)(object)component, in level);
			return component;
		}

		private static Transform FindBestRootBone(Transform transform, SkinnedMeshRenderer[] skinnedMeshRenderers)
		{
			//IL_0058: Unknown result type (might be due to invalid IL or missing references)
			//IL_005e: Unknown result type (might be due to invalid IL or missing references)
			//IL_0063: Unknown result type (might be due to invalid IL or missing references)
			//IL_0068: Unknown result type (might be due to invalid IL or missing references)
			if (skinnedMeshRenderers == null || skinnedMeshRenderers.Length == 0)
			{
				return null;
			}
			Transform result = null;
			float num = float.MaxValue;
			for (int i = 0; i < skinnedMeshRenderers.Length; i++)
			{
				if (!((Object)(object)skinnedMeshRenderers[i] == (Object)null) && !((Object)(object)skinnedMeshRenderers[i].rootBone == (Object)null))
				{
					Transform rootBone = skinnedMeshRenderers[i].rootBone;
					Vector3 val = rootBone.position - transform.position;
					float sqrMagnitude = ((Vector3)(ref val)).sqrMagnitude;
					if (sqrMagnitude < num)
					{
						result = rootBone;
						num = sqrMagnitude;
					}
				}
			}
			return result;
		}

		private static void SetupLevelRenderer(Renderer renderer, in LODLevel level)
		{
			//IL_000b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0035: Unknown result type (might be due to invalid IL or missing references)
			//IL_004a: Unknown result type (might be due to invalid IL or missing references)
			//IL_005f: Unknown result type (might be due to invalid IL or missing references)
			//IL_0087: Unknown result type (might be due to invalid IL or missing references)
			renderer.shadowCastingMode = level.ShadowCastingMode;
			renderer.receiveShadows = level.ReceiveShadows;
			renderer.motionVectorGenerationMode = level.MotionVectorGenerationMode;
			renderer.lightProbeUsage = level.LightProbeUsage;
			renderer.reflectionProbeUsage = level.ReflectionProbeUsage;
			SkinnedMeshRenderer val = (SkinnedMeshRenderer)(object)((renderer is SkinnedMeshRenderer) ? renderer : null);
			if ((Object)(object)val != (Object)null)
			{
				val.quality = level.SkinQuality;
				val.skinnedMotionVectors = level.SkinnedMotionVectors;
			}
		}

		private static Renderer[] GetChildRenderersForLOD(GameObject gameObject)
		{
			List<Renderer> list = new List<Renderer>();
			CollectChildRenderersForLOD(gameObject.transform, list);
			return list.ToArray();
		}

		private static void CollectChildRenderersForLOD(Transform transform, List<Renderer> resultRenderers)
		{
			//IL_0093: Unknown result type (might be due to invalid IL or missing references)
			Renderer[] components = ((Component)transform).GetComponents<Renderer>();
			components = components.Where((Renderer r) => !(r is SkinnedMeshRenderer)).ToArray();
			components = components.Where((Renderer r) => r.enabled).ToArray();
			resultRenderers.AddRange(components);
			int childCount = transform.childCount;
			for (int i = 0; i < childCount; i++)
			{
				Transform child = transform.GetChild(i);
				if (((Component)child).gameObject.activeSelf && (LayerMask.op_Implicit(MeshService.LODlayers) & (1 << ((Component)child).gameObject.layer)) != 0 && !string.Equals(((Object)child).name, LODParentGameObjectName) && !((Object)(object)((Component)child).GetComponent<LODGroup>() != (Object)null) && !((Object)(object)((Component)child).GetComponent<LODGeneratorHelper>() != (Object)null))
				{
					CollectChildRenderersForLOD(child, resultRenderers);
				}
			}
		}

		private static Mesh SimplifyMesh(Mesh mesh, float quality, in SimplificationOptions options)
		{
			MeshSimplifier meshSimplifier = new MeshSimplifier();
			meshSimplifier.SimplificationOptions = options;
			meshSimplifier.Initialize(mesh);
			meshSimplifier.SimplifyMesh(quality);
			Mesh val = meshSimplifier.ToMesh();
			val.bindposes = mesh.bindposes;
			return val;
		}

		private static void DestroyObject(Object obj)
		{
			if (obj == (Object)null)
			{
				throw new ArgumentNullException("obj");
			}
			Object.Destroy(obj);
		}

		private static void CreateBackup(GameObject gameObject, Renderer[] originalRenderers)
		{
			LODBackupComponent lODBackupComponent = gameObject.AddComponent<LODBackupComponent>();
			((Object)lODBackupComponent).hideFlags = (HideFlags)2;
			lODBackupComponent.OriginalRenderers = originalRenderers;
		}

		private static void RestoreBackup(GameObject gameObject)
		{
			LODBackupComponent[] components = gameObject.GetComponents<LODBackupComponent>();
			LODBackupComponent[] array = components;
			foreach (LODBackupComponent lODBackupComponent in array)
			{
				Renderer[] originalRenderers = lODBackupComponent.OriginalRenderers;
				if (originalRenderers != null)
				{
					Renderer[] array2 = originalRenderers;
					foreach (Renderer val in array2)
					{
						if ((Object)(object)val != (Object)null)
						{
							val.enabled = true;
						}
					}
				}
				DestroyObject((Object)(object)lODBackupComponent);
			}
		}

		private static string ValidateSaveAssetsPath(string saveAssetsPath)
		{
			if (string.IsNullOrEmpty(saveAssetsPath))
			{
				return null;
			}
			Debug.LogWarning((object)"Unable to save assets when not running in the Unity Editor.");
			return null;
		}
	}
	[Serializable]
	public struct LODLevel
	{
		[SerializeField]
		[Range(0f, 1f)]
		[Tooltip("The screen relative height to use for the transition.")]
		private float screenRelativeTransitionHeight;

		[SerializeField]
		[Range(0f, 1f)]
		[Tooltip("The width of the cross-fade transition zone (proportion to the current LOD's whole length).")]
		private float fadeTransitionWidth;

		[SerializeField]
		[Range(0f, 1f)]
		[Tooltip("The desired quality for this level.")]
		private float quality;

		[SerializeField]
		[Tooltip("If all renderers and meshes under this level should be combined into one, where possible.")]
		private bool combineMeshes;

		[SerializeField]
		[Tooltip("If all sub-meshes should be combined into one, where possible.")]
		private bool combineSubMeshes;

		[SerializeField]
		[Tooltip("The renderers used in this level.")]
		private Renderer[] renderers;

		[SerializeField]
		[Tooltip("The skin quality to use for renderers on this level.")]
		private SkinQuality skinQuality;

		[SerializeField]
		[Tooltip("The shadow casting mode for renderers on this level.")]
		private ShadowCastingMode shadowCastingMode;

		[SerializeField]
		[Tooltip("If renderers on this level should receive shadows.")]
		private bool receiveShadows;

		[SerializeField]
		[Tooltip("The motion vector generation mode for renderers on this level.")]
		private MotionVectorGenerationMode motionVectorGenerationMode;

		[SerializeField]
		[Tooltip("If renderers on this level should use skinned motion vectors.")]
		private bool skinnedMotionVectors;

		[SerializeField]
		[Tooltip("The light probe usage for renderers on this level.")]
		private LightProbeUsage lightProbeUsage;

		[SerializeField]
		[Tooltip("The reflection probe usage for renderers on this level.")]
		private ReflectionProbeUsage reflectionProbeUsage;

		public float ScreenRelativeTransitionHeight
		{
			get
			{
				return screenRelativeTransitionHeight;
			}
			set
			{
				screenRelativeTransitionHeight = Mathf.Clamp01(value);
			}
		}

		public float FadeTransitionWidth
		{
			get
			{
				return fadeTransitionWidth;
			}
			set
			{
				fadeTransitionWidth = Mathf.Clamp01(value);
			}
		}

		public float Quality
		{
			get
			{
				return quality;
			}
			set
			{
				quality = Mathf.Clamp01(value);
			}
		}

		public bool CombineMeshes
		{
			get
			{
				return combineMeshes;
			}
			set
			{
				combineMeshes = value;
			}
		}

		public bool CombineSubMeshes
		{
			get
			{
				return combineSubMeshes;
			}
			set
			{
				combineSubMeshes = value;
			}
		}

		public Renderer[] Renderers
		{
			get
			{
				return renderers;
			}
			set
			{
				renderers = value;
			}
		}

		public SkinQuality SkinQuality
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return skinQuality;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				skinQuality = value;
			}
		}

		public ShadowCastingMode ShadowCastingMode
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return shadowCastingMode;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				shadowCastingMode = value;
			}
		}

		public bool ReceiveShadows
		{
			get
			{
				return receiveShadows;
			}
			set
			{
				receiveShadows = value;
			}
		}

		public MotionVectorGenerationMode MotionVectorGenerationMode
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return motionVectorGenerationMode;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				motionVectorGenerationMode = value;
			}
		}

		public bool SkinnedMotionVectors
		{
			get
			{
				return skinnedMotionVectors;
			}
			set
			{
				skinnedMotionVectors = value;
			}
		}

		public LightProbeUsage LightProbeUsage
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return lightProbeUsage;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				lightProbeUsage = value;
			}
		}

		public ReflectionProbeUsage ReflectionProbeUsage
		{
			get
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0007: Unknown result type (might be due to invalid IL or missing references)
				//IL_000a: Unknown result type (might be due to invalid IL or missing references)
				return reflectionProbeUsage;
			}
			set
			{
				//IL_0002: Unknown result type (might be due to invalid IL or missing references)
				//IL_0003: Unknown result type (might be due to invalid IL or missing references)
				reflectionProbeUsage = value;
			}
		}

		public LODLevel(float screenRelativeTransitionHeight, float quality)
			: this(screenRelativeTransitionHeight, 0f, quality, combineMeshes: false, combineSubMeshes: false, null)
		{
		}

		public LODLevel(float screenRelativeTransitionHeight, float fadeTransitionWidth, float quality, bool combineMeshes, bool combineSubMeshes)
			: this(screenRelativeTransitionHeight, fadeTransitionWidth, quality, combineMeshes, combineSubMeshes, null)
		{
		}

		public LODLevel(float screenRelativeTransitionHeight, float fadeTransitionWidth, float quality, bool combineMeshes, bool combineSubMeshes, Renderer[] renderers)
		{
			//IL_003a: Unknown result type (might be due to invalid IL or missing references)
			//IL_0041: Unknown result type (might be due to invalid IL or missing references)
			//IL_004f: Unknown result type (might be due to invalid IL or missing references)
			//IL_005d: Unknown result type (might be due to invalid IL or missing references)
			//IL_0064: Unknown result type (might be due to invalid IL or missing references)
			this.screenRelativeTransitionHeight = Mathf.Clamp01(screenRelativeTransitionHeight);
			this.fadeTransitionWidth = fadeTransitionWidth;
			this.quality = Mathf.Clamp01(quality);
			this.combineMeshes = combineMeshes;
			this.combineSubMeshes = combineSubMeshes;
			this.renderers = renderers;
			skinQuality = (SkinQuality)0;
			shadowCastingMode = (ShadowCastingMode)1;
			receiveShadows = true;
			motionVectorGenerationMode = (MotionVectorGenerationMode)1;
			skinnedMotionVectors = true;
			lightProbeUsage = (LightProbeUsage)1;
			reflectionProbeUsage = (ReflectionProbeUsage)1;
		}
	}
	public static class MathHelper
	{
		public const float PI = MathF.PI;

		public const double PId = Math.PI;

		public const float Deg2Rad = MathF.PI / 180f;

		public const double Deg2Radd = Math.PI / 180.0;

		public const float Rad2Deg = 180f / MathF.PI;

		public const double Rad2Degd = 180.0 / Math.PI;

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Min(double val1, double val2, double val3)
		{
			return (!(val1 < val2)) ? ((val2 < val3) ? val2 : val3) : ((val1 < val3) ? val1 : val3);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Clamp(double value, double min, double max)
		{
			return (!(value >= min)) ? min : ((value <= max) ? value : max);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double TriangleArea(ref Vector3d p0, ref Vector3d p1, ref Vector3d p2)
		{
			Vector3d from = p1 - p0;
			Vector3d to = p2 - p0;
			return from.Magnitude * (Math.Sin(Vector3d.Angle(ref from, ref to) * (Math.PI / 180.0)) * to.Magnitude) * 0.5;
		}
	}
	public struct SymmetricMatrix
	{
		public double m0;

		public double m1;

		public double m2;

		public double m3;

		public double m4;

		public double m5;

		public double m6;

		public double m7;

		public double m8;

		public double m9;

		public double this[int index]
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				return index switch
				{
					0 => m0, 
					1 => m1, 
					2 => m2, 
					3 => m3, 
					4 => m4, 
					5 => m5, 
					6 => m6, 
					7 => m7, 
					8 => m8, 
					9 => m9, 
					_ => throw new ArgumentOutOfRangeException("index"), 
				};
			}
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public SymmetricMatrix(double c)
		{
			m0 = c;
			m1 = c;
			m2 = c;
			m3 = c;
			m4 = c;
			m5 = c;
			m6 = c;
			m7 = c;
			m8 = c;
			m9 = c;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public SymmetricMatrix(double m0, double m1, double m2, double m3, double m4, double m5, double m6, double m7, double m8, double m9)
		{
			this.m0 = m0;
			this.m1 = m1;
			this.m2 = m2;
			this.m3 = m3;
			this.m4 = m4;
			this.m5 = m5;
			this.m6 = m6;
			this.m7 = m7;
			this.m8 = m8;
			this.m9 = m9;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public SymmetricMatrix(double a, double b, double c, double d)
		{
			m0 = a * a;
			m1 = a * b;
			m2 = a * c;
			m3 = a * d;
			m4 = b * b;
			m5 = b * c;
			m6 = b * d;
			m7 = c * c;
			m8 = c * d;
			m9 = d * d;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static SymmetricMatrix operator +(SymmetricMatrix a, SymmetricMatrix b)
		{
			return new SymmetricMatrix(a.m0 + b.m0, a.m1 + b.m1, a.m2 + b.m2, a.m3 + b.m3, a.m4 + b.m4, a.m5 + b.m5, a.m6 + b.m6, a.m7 + b.m7, a.m8 + b.m8, a.m9 + b.m9);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		internal double Determinant1()
		{
			return m0 * m4 * m7 + m2 * m1 * m5 + m1 * m5 * m2 - m2 * m4 * m2 - m0 * m5 * m5 - m1 * m1 * m7;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		internal double Determinant2()
		{
			return m1 * m5 * m8 + m3 * m4 * m7 + m2 * m6 * m5 - m3 * m5 * m5 - m1 * m6 * m7 - m2 * m4 * m8;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		internal double Determinant3()
		{
			return m0 * m5 * m8 + m3 * m1 * m7 + m2 * m6 * m2 - m3 * m5 * m2 - m0 * m6 * m7 - m2 * m1 * m8;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		internal double Determinant4()
		{
			return m0 * m4 * m8 + m3 * m1 * m5 + m1 * m6 * m2 - m3 * m4 * m2 - m0 * m6 * m5 - m1 * m1 * m8;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public double Determinant(int a11, int a12, int a13, int a21, int a22, int a23, int a31, int a32, int a33)
		{
			return this[a11] * this[a22] * this[a33] + this[a13] * this[a21] * this[a32] + this[a12] * this[a23] * this[a31] - this[a13] * this[a22] * this[a31] - this[a11] * this[a23] * this[a32] - this[a12] * this[a21] * this[a33];
		}
	}
	public struct Vector3d : IEquatable<Vector3d>
	{
		public static readonly Vector3d zero = new Vector3d(0.0, 0.0, 0.0);

		public const double Epsilon = double.Epsilon;

		public double x;

		public double y;

		public double z;

		public double Magnitude
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				return Math.Sqrt(x * x + y * y + z * z);
			}
		}

		public double MagnitudeSqr
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				return x * x + y * y + z * z;
			}
		}

		public Vector3d Normalized
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				Normalize(ref this, out var result);
				return result;
			}
		}

		public double this[int index]
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				return index switch
				{
					0 => x, 
					1 => y, 
					2 => z, 
					_ => throw new ArgumentOutOfRangeException("index", "Invalid Vector3d index!"), 
				};
			}
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			set
			{
				switch (index)
				{
				case 0:
					x = value;
					break;
				case 1:
					y = value;
					break;
				case 2:
					z = value;
					break;
				default:
					throw new ArgumentOutOfRangeException("index", "Invalid Vector3d index!");
				}
			}
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public Vector3d(double value)
		{
			x = value;
			y = value;
			z = value;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public Vector3d(double x, double y, double z)
		{
			this.x = x;
			this.y = y;
			this.z = z;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public Vector3d(Vector3 vector)
		{
			//IL_0002: Unknown result type (might be due to invalid IL or missing references)
			//IL_000f: Unknown result type (might be due to invalid IL or missing references)
			//IL_001c: Unknown result type (might be due to invalid IL or missing references)
			x = vector.x;
			y = vector.y;
			z = vector.z;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator +(Vector3d a, Vector3d b)
		{
			return new Vector3d(a.x + b.x, a.y + b.y, a.z + b.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator -(Vector3d a, Vector3d b)
		{
			return new Vector3d(a.x - b.x, a.y - b.y, a.z - b.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator *(Vector3d a, double d)
		{
			return new Vector3d(a.x * d, a.y * d, a.z * d);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator *(double d, Vector3d a)
		{
			return new Vector3d(a.x * d, a.y * d, a.z * d);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator /(Vector3d a, double d)
		{
			return new Vector3d(a.x / d, a.y / d, a.z / d);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static Vector3d operator -(Vector3d a)
		{
			return new Vector3d(0.0 - a.x, 0.0 - a.y, 0.0 - a.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static bool operator ==(Vector3d lhs, Vector3d rhs)
		{
			return (lhs - rhs).MagnitudeSqr < double.Epsilon;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static bool operator !=(Vector3d lhs, Vector3d rhs)
		{
			return (lhs - rhs).MagnitudeSqr >= double.Epsilon;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static implicit operator Vector3d(Vector3 v)
		{
			//IL_0001: Unknown result type (might be due to invalid IL or missing references)
			//IL_0008: Unknown result type (might be due to invalid IL or missing references)
			//IL_000f: Unknown result type (might be due to invalid IL or missing references)
			return new Vector3d(v.x, v.y, v.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static explicit operator Vector3(Vector3d v)
		{
			//IL_0016: Unknown result type (might be due to invalid IL or missing references)
			//IL_001b: Unknown result type (might be due to invalid IL or missing references)
			//IL_001e: Unknown result type (might be due to invalid IL or missing references)
			return new Vector3((float)v.x, (float)v.y, (float)v.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public void Set(double x, double y, double z)
		{
			this.x = x;
			this.y = y;
			this.z = z;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public void Scale(ref Vector3d scale)
		{
			x *= scale.x;
			y *= scale.y;
			z *= scale.z;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public void Normalize()
		{
			double magnitude = Magnitude;
			if (magnitude > double.Epsilon)
			{
				x /= magnitude;
				y /= magnitude;
				z /= magnitude;
			}
			else
			{
				x = (y = (z = 0.0));
			}
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public void Clamp(double min, double max)
		{
			if (x < min)
			{
				x = min;
			}
			else if (x > max)
			{
				x = max;
			}
			if (y < min)
			{
				y = min;
			}
			else if (y > max)
			{
				y = max;
			}
			if (z < min)
			{
				z = min;
			}
			else if (z > max)
			{
				z = max;
			}
		}

		public override int GetHashCode()
		{
			return x.GetHashCode() ^ (y.GetHashCode() << 2) ^ (z.GetHashCode() >> 2);
		}

		public override bool Equals(object obj)
		{
			if (!(obj is Vector3d vector3d))
			{
				return false;
			}
			return x == vector3d.x && y == vector3d.y && z == vector3d.z;
		}

		public bool Equals(Vector3d other)
		{
			return x == other.x && y == other.y && z == other.z;
		}

		public override string ToString()
		{
			return $"({x:F1}, {y:F1}, {z:F1})";
		}

		public string ToString(string format)
		{
			return $"({x.ToString(format)}, {y.ToString(format)}, {z.ToString(format)})";
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Dot(ref Vector3d lhs, ref Vector3d rhs)
		{
			return lhs.x * rhs.x + lhs.y * rhs.y + lhs.z * rhs.z;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static void Cross(ref Vector3d lhs, ref Vector3d rhs, out Vector3d result)
		{
			result = new Vector3d(lhs.y * rhs.z - lhs.z * rhs.y, lhs.z * rhs.x - lhs.x * rhs.z, lhs.x * rhs.y - lhs.y * rhs.x);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Angle(ref Vector3d from, ref Vector3d to)
		{
			Vector3d lhs = from.Normalized;
			Vector3d rhs = to.Normalized;
			return Math.Acos(MathHelper.Clamp(Dot(ref lhs, ref rhs), -1.0, 1.0)) * (180.0 / Math.PI);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static void Lerp(ref Vector3d a, ref Vector3d b, double t, out Vector3d result)
		{
			result = new Vector3d(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t, a.z + (b.z - a.z) * t);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static void Scale(ref Vector3d a, ref Vector3d b, out Vector3d result)
		{
			result = new Vector3d(a.x * b.x, a.y * b.y, a.z * b.z);
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static void Normalize(ref Vector3d value, out Vector3d result)
		{
			double magnitude = value.Magnitude;
			if (magnitude > double.Epsilon)
			{
				result = new Vector3d(value.x / magnitude, value.y / magnitude, value.z / magnitude);
			}
			else
			{
				result = zero;
			}
		}
	}
	public static class MeshCombiner
	{
		public static Mesh CombineMeshes(Transform rootTransform, MeshRenderer[] renderers, out Material[] resultMaterials)
		{
			//IL_0125: Unknown result type (might be due to invalid IL or missing references)
			//IL_012c: Unknown result type (might be due to invalid IL or missing references)
			//IL_0131: Unknown result type (might be due to invalid IL or missing references)
			//IL_0136: Unknown result type (might be due to invalid IL or missing references)
			if ((Object)(object)rootTransform == (Object)null)
			{
				throw new ArgumentNullException("rootTransform");
			}
			if (renderers == null)
			{
				throw new ArgumentNullException("renderers");
			}
			Mesh[] array = (Mesh[])(object)new Mesh[renderers.Length];
			Matrix4x4[] array2 = (Matrix4x4[])(object)new Matrix4x4[renderers.Length];
			Material[][] array3 = new Material[renderers.Length][];
			for (int i = 0; i < renderers.Length; i++)
			{
				MeshRenderer val = renderers[i];
				if ((Object)(object)val == (Object)null)
				{
					throw new ArgumentException($"The renderer at index {i} is null.", "renderers");
				}
				Transform transform = ((Component)val).transform;
				MeshFilter component = ((Component)val).GetComponent<MeshFilter>();
				if ((Object)(object)component == (Object)null)
				{
					throw new ArgumentException($"The renderer at index {i} has no mesh filter.", "renderers");
				}
				if ((Object)(object)component.sharedMesh == (Object)null)
				{
					throw new ArgumentException($"The mesh filter for renderer at index {i} has no mesh.", "renderers");
				}
				if (!CanReadMesh(component.sharedMesh))
				{
					array[i] = MeshService.GetReadableMesh(component.sharedMesh);
				}
				else
				{
					array[i] = component.sharedMesh;
				}
				array2[i] = rootTransform.worldToLocalMatrix * transform.localToWorldMatrix;
				array3[i] = ((Renderer)val).sharedMaterials;
			}
			return CombineMeshes(array, array2, array3, out resultMaterials);
		}

		public static Mesh CombineMeshes(Transform rootTransform, SkinnedMeshRenderer[] renderers, out Material[] resultMaterials, out Transform[] resultBones)
		{
			//IL_00fe: Unknown result type (might be due to invalid IL or missing references)
			//IL_0105: Unknown result type (might be due to invalid IL or missing references)
			//IL_010a: Unknown result type (might be due to invalid IL or missing references)
			//IL_010f: Unknown result type (might be due to invalid IL or missing references)
			if ((Object)(object)rootTransform == (Object)null)
			{
				throw new ArgumentNullException("rootTransform");
			}
			if (renderers == null)
			{
				throw new ArgumentNullException("renderers");
			}
			Mesh[] array = (Mesh[])(object)new Mesh[renderers.Length];
			Matrix4x4[] array2 = (Matrix4x4[])(object)new Matrix4x4[renderers.Length];
			Material[][] array3 = new Material[renderers.Length][];
			Transform[][] array4 = new Transform[renderers.Length][];
			for (int i = 0; i < renderers.Length; i++)
			{
				SkinnedMeshRenderer val = renderers[i];
				if ((Object)(object)val == (Object)null)
				{
					throw new ArgumentException($"The renderer at index {i} is null.", "renderers");
				}
				if ((Object)(object)val.sharedMesh == (Object)null)
				{
					throw new ArgumentException($"The renderer at index {i} has no mesh.", "renderers");
				}
				if (!CanReadMesh(val.sharedMesh))
				{
					array[i] = MeshService.GetReadableMesh(val.sharedMesh);
				}
				else
				{
					array[i] = val.sharedMesh;
				}
				Transform transform = ((Component)val).transform;
				array2[i] = transform.worldToLocalMatrix * transform.localToWorldMatrix;
				array3[i] = ((Renderer)val).sharedMaterials;
				array4[i] = val.bones;
			}
			return CombineMeshes(array, array2, array3, array4, out resultMaterials, out resultBones);
		}

		public static Mesh CombineMeshes(Mesh[] meshes, Matrix4x4[] transforms, Material[][] materials, out Material[] resultMaterials)
		{
			if (meshes == null)
			{
				throw new ArgumentNullException("meshes");
			}
			if (transforms == null)
			{
				throw new ArgumentNullException("transforms");
			}
			if (materials == null)
			{
				throw new ArgumentNullException("materials");
			}
			Transform[] resultBones;
			return CombineMeshes(meshes, transforms, materials, null, out resultMaterials, out resultBones);
		}

		public static Mesh CombineMeshes(Mesh[] meshes, Matrix4x4[] transforms, Material[][] materials, Transform[][] bones, out Material[] resultMaterials, out Transform[] resultBones)
		{
			//IL_020c: Unknown result type (might be due to invalid IL or missing references)
			//IL_0211: Unknown result type (might be due to invalid IL or missing references)
			//IL_0395: Unknown result type (might be due to invalid IL or missing references)
			//IL_03bd: Unknown result type (might be due to invalid IL or missing references)
			//IL_03e5: Unknown result type (might be due to invalid IL or missing references)
			//IL_03fb: Unknown result type (might be due to invalid IL or missing references)
			//IL_0401: Unknown result type (might be due to invalid IL or missing references)
			//IL_0436: Unknown result type (might be due to invalid IL or missing references)
			//IL_02ea: Unknown result type (might be due to invalid IL or missing references)
			//IL_02f3: Unknown result type (might be due to invalid IL or missing references)
			//IL_0323: Unknown result type (might be due to invalid IL or missing references)
			if (meshes == null)
			{
				throw new ArgumentNullException("meshes");
			}
			if (transforms == null)
			{
				throw new ArgumentNullException("transforms");
			}
			if (materials == null)
			{
				throw new ArgumentNullException("materials");
			}
			if (transforms.Length != meshes.Length)
			{
				throw new ArgumentException("The array of transforms doesn't have the same length as the array of meshes.", "transforms");
			}
			if (materials.Length != meshes.Length)
			{
				throw new ArgumentException("The array of materials doesn't have the same length as the array of meshes.", "materials");
			}
			if (bones != null && bones.Length != meshes.Length)
			{
				throw new ArgumentException("The array of bones doesn't have the same length as the array of meshes.", "bones");
			}
			int num = 0;
			int num2 = 0;
			for (int i = 0; i < meshes.Length; i++)
			{
				Mesh val = meshes[i];
				if ((Object)(object)val == (Object)null || !CanReadMesh(val))
				{
					continue;
				}
				Material[] array = materials[i];
				if (array == null || array.Length != val.subMeshCount)
				{
					continue;
				}
				for (int j = 0; j < array.Length; j++)
				{
					if ((Object)(object)array[j] == (Object)null)
					{
					}
				}
				if (bones != null)
				{
					Transform[] array2 = bones[i];
					if (array2 == null)
					{
						continue;
					}
					for (int k = 0; k < array2.Length; k++)
					{
						if ((Object)(object)array2[k] == (Object)null)
						{
						}
					}
				}
				num += val.vertexCount;
				num2 += val.subMeshCount;
			}
			List<Vector3> list = new List<Vector3>(num);
			List<int[]> list2 = new List<int[]>(num2);
			List<Vector3> dest = null;
			List<Vector4> dest2 = null;
			List<Color> dest3 = null;
			List<BoneWeight> dest4 = null;
			List<Vector4>[] array3 = new List<Vector4>[MeshUtils.UVChannelCount];
			List<Matrix4x4> list3 = null;
			List<Transform> list4 = null;
			List<Material> list5 = new List<Material>(num2);
			Dictionary<Material, int> dictionary = new Dictionary<Material, int>(num2);
			int num3 = 0;
			for (int l = 0; l < meshes.Length; l++)
			{
				Mesh val2 = meshes[l];
				Matrix4x4 transform = transforms[l];
				Material[] array4 = materials[l];
				Transform[] array5 = ((bones != null) ? bones[l] : null);
				int subMeshCount = val2.subMeshCount;
				int vertexCount = val2.vertexCount;
				Vector3[] vertices = val2.vertices;
				Vector3[] normals = val2.normals;
				Vector4[] tangents = val2.tangents;
				IList<Vector4>[] meshUVs = MeshUtils.GetMeshUVs(val2);
				Color[] colors = val2.colors;
				BoneWeight[] boneWeights = val2.boneWeights;
				Matrix4x4[] bindposes = val2.bindposes;
				if (array5 != null && boneWeights != null && boneWeights.Length != 0 && bindposes != null && bindposes.Length != 0 && array5.Length == bindposes.Length)
				{
					if (list3 == null)
					{
						list3 = new List<Matrix4x4>(bindposes);
						list4 = new List<Transform>(array5);
					}
					int[] array6 = new int[array5.Length];
					for (int m = 0; m < array5.Length; m++)
					{
						int num4 = list4.IndexOf(array5[m]);
						if (num4 == -1 || bindposes[m] != list3[num4])
						{
							num4 = list4.Count;
							list4.Add(array5[m]);
							list3.Add(bindposes[m]);
						}
						array6[m] = num4;
					}
					RemapBones(boneWeights, array6);
				}
				TransformVertices(vertices, ref transform);
				TransformNormals(normals, ref transform);
				TransformTangents(tangents, ref transform);
				CopyVertexPositions(list, vertices);
				CopyVertexAttributes(ref dest, normals, num3, vertexCount, num, new Vector3(1f, 0f, 0f));
				CopyVertexAttributes(ref dest2, tangents, num3, vertexCount, num, new Vector4(0f, 0f, 1f, 1f));
				CopyVertexAttributes(ref dest3, colors, num3, vertexCount, num, new Color(1f, 1f, 1f, 1f));
				CopyVertexAttributes(ref dest4, boneWeights, num3, vertexCount, num, default(BoneWeight));
				for (int n = 0; n < meshUVs.Length; n++)
				{
					CopyVertexAttributes(ref array3[n], meshUVs[n], num3, vertexCount, num, new Vector4(0f, 0f, 0f, 0f));
				}
				for (int num5 = 0; num5 < subMeshCount; num5++)
				{
					Material val3 = array4[num5];
					int[] triangles = val2.GetTriangles(num5, true);
					if (num3 > 0)
					{
						for (int num6 = 0; num6 < triangles.Length; num6++)
						{
							triangles[num6] += num3;
						}
					}
					if (dictionary.TryGetValue(val3, out var value))
					{
						list2[value] = MergeArrays(list2[value], triangles);
						continue;
					}
					int count = list2.Count;
					dictionary.Add(val3, count);
					list5.Add(val3);
					list2.Add(triangles);
				}
				num3 += vertexCount;
			}
			Vector3[] vertices2 = list.ToArray();
			int[][] indices = list2.ToArray();
			Vector3[] normals2 = dest?.ToArray();
			Vector4[] tangents2 = dest2?.ToArray();
			Color[] colors2 = dest3?.ToArray();
			BoneWeight[] boneWeights2 = dest4?.ToArray();
			List<Vector4>[] uvs = array3.ToArray();
			Matrix4x4[] bindposes2 = list3?.ToArray();
			resultMaterials = list5.ToArray();
			resultBones = list4?.ToArray();
			return MeshUtils.CreateMesh(vertices2, indices, normals2, tangents2, colors2, boneWeights2, uvs, bindposes2, null);
		}

		private static void CopyVertexPositions(ICollection<Vector3> list, Vector3[] arr)
		{
			//IL_001a: Unknown result type (might be due to invalid IL or missing references)
			if (arr != null && arr.Length != 0)
			{
				for (int i = 0; i < arr.Length; i++)
				{
					list.Add(arr[i]);
				}
			}
		}

		private static void CopyVertexAttributes<T>(ref List<T> dest, IEnumerable<T> src, int previousVertexCount, int meshVertexCount, int totalVertexCount, T defaultValue)
		{
			if (src == null || src.Count() == 0)
			{
				if (dest != null)
				{
					for (int i = 0; i < meshVertexCount; i++)
					{
						dest.Add(defaultValue);
					}
				}
				return;
			}
			if (dest == null)
			{
				dest = new List<T>(totalVertexCount);
				for (int j = 0; j < previousVertexCount; j++)
				{
					dest.Add(defaultValue);
				}
			}
			dest.AddRange(src);
		}

		private static T[] MergeArrays<T>(T[] arr1, T[] arr2)
		{
			T[] array = new T[arr1.Length + arr2.Length];
			Array.Copy(arr1, 0, array, 0, arr1.Length);
			Array.Copy(arr2, 0, array, arr1.Length, arr2.Length);
			return array;
		}

		private static void TransformVertices(Vector3[] vertices, ref Matrix4x4 transform)
		{
			//IL_000b: Unknown result type (might be due to invalid IL or missing references)
			//IL_0010: Unknown result type (might be due to invalid IL or missing references)
			//IL_0015: Unknown result type (might be due to invalid IL or missing references)
			for (int i = 0; i < vertices.Length; i++)
			{
				vertices[i] = ((Matrix4x4)(ref transform)).MultiplyPoint3x4(vertices[i]);
			}
		}

		private static void TransformNormals(Vector3[] normals, ref Matrix4x4 transform)
		{
			//IL_0015: Unknown result type (might be due to invalid IL or missing references)
			//IL_001a: Unknown result type (might be due to invalid IL or missing references)
			//IL_001f: Unknown result type (might be due to invalid IL or missing references)
			if (normals != null)
			{
				for (int i = 0; i < normals.Length; i++)
				{
					normals[i] = ((Matrix4x4)(ref transform)).MultiplyVector(normals[i]);
				}
			}
		}

		private static void TransformTangents(Vector4[] tangents, ref Matrix4x4 transform)
		{
			//IL_0035: Unknown result type (might be due to invalid IL or missing references)
			//IL_003a: Unknown result type (might be due to invalid IL or missing references)
			//IL_003f: Unknown result type (might be due to invalid IL or missing references)
			//IL_0042: Unknown result type (might be due to invalid IL or missing references)
			//IL_0048: Unknown result type (might be due to invalid IL or missing references)
			//IL_004e: Unknown result type (might be due to invalid IL or missing references)
			//IL_0060: Unknown result type (might be due to invalid IL or missing references)
			//IL_0065: Unknown result type (might be due to invalid IL or missing references)
			if (tangents != null)
			{
				for (int i = 0; i < tangents.Length; i++)
				{
					Vector3 val = ((Matrix4x4)(ref transform)).MultiplyVector(new Vector3(tangents[i].x, tangents[i].y, tangents[i].z));
					tangents[i] = new Vector4(val.x, val.y, val.z, tangents[i].w);
				}
			}
		}

		private static void RemapBones(BoneWeight[] boneWeights, int[] boneIndices)
		{
			for (int i = 0; i < boneWeights.Length; i++)
			{
				if (((BoneWeight)(ref boneWeights[i])).weight0 > 0f)
				{
					((BoneWeight)(ref boneWeights[i])).boneIndex0 = boneIndices[((BoneWeight)(ref boneWeights[i])).boneIndex0];
				}
				if (((BoneWeight)(ref boneWeights[i])).weight1 > 0f)
				{
					((BoneWeight)(ref boneWeights[i])).boneIndex1 = boneIndices[((BoneWeight)(ref boneWeights[i])).boneIndex1];
				}
				if (((BoneWeight)(ref boneWeights[i])).weight2 > 0f)
				{
					((BoneWeight)(ref boneWeights[i])).boneIndex2 = boneIndices[((BoneWeight)(ref boneWeights[i])).boneIndex2];
				}
				if (((BoneWeight)(ref boneWeights[i])).weight3 > 0f)
				{
					((BoneWeight)(ref boneWeights[i])).boneIndex3 = boneIndices[((BoneWeight)(ref boneWeights[i])).boneIndex3];
				}
			}
		}

		private static bool CanReadMesh(Mesh mesh)
		{
			return mesh.isReadable;
		}
	}
	public sealed class MeshSimplifier
	{
		private const int TriangleEdgeCount = 3;

		private const int TriangleVertexCount = 3;

		private const double DoubleEpsilon = 0.001;

		private const double DenomEpilson = 1E-08;

		private static readonly int UVChannelCount = MeshUtils.UVChannelCount;

		private SimplificationOptions simplificationOptions = SimplificationOptions.Default;

		private bool verbose = false;

		private int subMeshCount = 0;

		private int[] subMeshOffsets = null;

		private ResizableArray<Triangle> triangles = null;

		private ResizableArray<Vertex> vertices = null;

		private ResizableArray<Ref> refs = null;

		private ResizableArray<Vector3> vertNormals = null;

		private ResizableArray<Vector4> vertTangents = null;

		private UVChannels<Vector2> vertUV2D = null;

		private UVChannels<Vector3> vertUV3D = null;

		private UVChannels<Vector4> vertUV4D = null;

		private ResizableArray<Color> vertColors = null;

		private ResizableArray<BoneWeight> vertBoneWeights = null;

		private ResizableArray<BlendShapeContainer> blendShapes = null;

		private Matrix4x4[] bindposes = null;

		private readonly double[] errArr = new double[3];

		private readonly int[] attributeIndexArr = new int[3];

		private readonly HashSet<Triangle> triangleHashSet1 = new HashSet<Triangle>();

		private readonly HashSet<Triangle> triangleHashSet2 = new HashSet<Triangle>();

		public SimplificationOptions SimplificationOptions
		{
			get
			{
				return simplificationOptions;
			}
			set
			{
				ValidateOptions(value);
				simplificationOptions = value;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public bool PreserveBorderEdges
		{
			get
			{
				return simplificationOptions.PreserveBorderEdges;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.PreserveBorderEdges = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public bool PreserveUVSeamEdges
		{
			get
			{
				return simplificationOptions.PreserveUVSeamEdges;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.PreserveUVSeamEdges = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public bool PreserveUVFoldoverEdges
		{
			get
			{
				return simplificationOptions.PreserveUVFoldoverEdges;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.PreserveUVFoldoverEdges = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public bool PreserveSurfaceCurvature
		{
			get
			{
				return simplificationOptions.PreserveSurfaceCurvature;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.PreserveSurfaceCurvature = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public bool EnableSmartLink
		{
			get
			{
				return simplificationOptions.EnableSmartLink;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.EnableSmartLink = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public int MaxIterationCount
		{
			get
			{
				return simplificationOptions.MaxIterationCount;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.MaxIterationCount = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public double Agressiveness
		{
			get
			{
				return simplificationOptions.Agressiveness;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.Agressiveness = value;
				SimplificationOptions = simplificationOptions;
			}
		}

		public bool Verbose
		{
			get
			{
				return verbose;
			}
			set
			{
				verbose = value;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public double VertexLinkDistance
		{
			get
			{
				return simplificationOptions.VertexLinkDistance;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.VertexLinkDistance = ((value > double.Epsilon) ? value : double.Epsilon);
				SimplificationOptions = simplificationOptions;
			}
		}

		[Obsolete("Use MeshSimplifier.SimplificationOptions instead.", false)]
		public double VertexLinkDistanceSqr
		{
			get
			{
				return simplificationOptions.VertexLinkDistance * simplificationOptions.VertexLinkDistance;
			}
			set
			{
				SimplificationOptions simplificationOptions = this.simplificationOptions;
				simplificationOptions.VertexLinkDistance = Math.Sqrt(value);
				SimplificationOptions = simplificationOptions;
			}
		}

		public Vector3[] Vertices
		{
			get
			{
				//IL_0033: Unknown result type (might be due to invalid IL or missing references)
				//IL_0038: Unknown result type (might be due to invalid IL or missing references)
				int length = vertices.Length;
				Vector3[] array = (Vector3[])(object)new Vector3[length];
				Vertex[] data = vertices.Data;
				for (int i = 0; i < length; i++)
				{
					array[i] = (Vector3)data[i].p;
				}
				return array;
			}
			set
			{
				//IL_0042: Unknown result type (might be due to invalid IL or missing references)
				if (value == null)
				{
					throw new ArgumentNullException("value");
				}
				bindposes = null;
				vertices.Resize(value.Length);
				Vertex[] data = vertices.Data;
				for (int i = 0; i < value.Length; i++)
				{
					data[i] = new Vertex(i, value[i]);
				}
			}
		}

		public int SubMeshCount => subMeshCount;

		public int BlendShapeCount => (blendShapes != null) ? blendShapes.Length : 0;

		public Vector3[] Normals
		{
			get
			{
				return (vertNormals != null) ? vertNormals.Data : null;
			}
			set
			{
				InitializeVertexAttribute(value, ref vertNormals, "normals");
			}
		}

		public Vector4[] Tangents
		{
			get
			{
				return (vertTangents != null) ? vertTangents.Data : null;
			}
			set
			{
				InitializeVertexAttribute(value, ref vertTangents, "tangents");
			}
		}

		public Vector2[] UV1
		{
			get
			{
				return GetUVs2D(0);
			}
			set
			{
				SetUVs(0, value);
			}
		}

		public Vector2[] UV2
		{
			get
			{
				return GetUVs2D(1);
			}
			set
			{
				SetUVs(1, value);
			}
		}

		public Vector2[] UV3
		{
			get
			{
				return GetUVs2D(2);
			}
			set
			{
				SetUVs(2, value);
			}
		}

		public Vector2[] UV4
		{
			get
			{
				return GetUVs2D(3);
			}
			set
			{
				SetUVs(3, value);
			}
		}

		public Color[] Colors
		{
			get
			{
				return (vertColors != null) ? vertColors.Data : null;
			}
			set
			{
				InitializeVertexAttribute(value, ref vertColors, "colors");
			}
		}

		public BoneWeight[] BoneWeights
		{
			get
			{
				return (vertBoneWeights != null) ? vertBoneWeights.Data : null;
			}
			set
			{
				InitializeVertexAttribute(value, ref vertBoneWeights, "boneWeights");
			}
		}

		public MeshSimplifier()
		{
			triangles = new ResizableArray<Triangle>(0);
			vertices = new ResizableArray<Vertex>(0);
			refs = new ResizableArray<Ref>(0);
		}

		public MeshSimplifier(Mesh mesh)
			: this()
		{
			if ((Object)(object)mesh != (Object)null)
			{
				Initialize(mesh);
			}
		}

		private void InitializeVertexAttribute<T>(T[] attributeValues, ref ResizableArray<T> attributeArray, string attributeName)
		{
			if (attributeValues != null && attributeValues.Length == vertices.Length)
			{
				if (attributeArray == null)
				{
					attributeArray = new ResizableArray<T>(attributeValues.Length, attributeValues.Length);
				}
				else
				{
					attributeArray.Resize(attributeValues.Length);
				}
				T[] data = attributeArray.Data;
				Array.Copy(attributeValues, 0, data, 0, attributeValues.Length);
				return;
			}
			if (attributeValues != null && attributeValues.Length != 0)
			{
				Debug.LogErrorFormat("Failed to set vertex attribute '{0}' with {1} length of array, when {2} was needed.", new object[3] { attributeName, attributeValues.Length, vertices.Length });
			}
			attributeArray = null;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		private static double VertexError(ref SymmetricMatrix q, double x, double y, double z)
		{
			return q.m0 * x * x + 2.0 * q.m1 * x * y + 2.0 * q.m2 * x * z + 2.0 * q.m3 * x + q.m4 * y * y + 2.0 * q.m5 * y * z + 2.0 * q.m6 * y + q.m7 * z * z + 2.0 * q.m8 * z + q.m9;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		private double CurvatureError(ref Vertex vert0, ref Vertex vert1)
		{
			double magnitude = (vert0.p - vert1.p).Magnitude;
			HashSet<Triangle> hashSet = triangleHashSet1;
			hashSet.Clear();
			GetTrianglesContainingVertex(ref vert0, hashSet);
			GetTrianglesContainingVertex(ref vert1, hashSet);
			HashSet<Triangle> hashSet2 = triangleHashSet2;
			hashSet2.Clear();
			GetTrianglesContainingBothVertices(ref vert0, ref vert1, hashSet2);
			double num = 0.0;
			foreach (Triangle item in hashSet)
			{
				double num2 = 0.0;
				Vector3d lhs = item.n;
				foreach (Triangle item2 in hashSet2)
				{
					Vector3d rhs = item2.n;
					double num3 = Vector3d.Dot(ref lhs, ref rhs);
					if (num3 > num2)
					{
						num2 = num3;
					}
				}
				if (num2 > num)
				{
					num = num2;
				}
			}
			return magnitude * num;
		}

		private double CalculateError(ref Vertex vert0, ref Vertex vert1, out Vector3d result)
		{
			SymmetricMatrix q = vert0.q + vert1.q;
			bool flag = vert0.borderEdge && vert1.borderEdge;
			double num = 0.0;
			double num2 = q.Determinant1();
			if (num2 != 0.0 && !flag)
			{
				result = new Vector3d(-1.0 / num2 * q.Determinant2(), 1.0 / num2 * q.Determinant3(), -1.0 / num2 * q.Determinant4());
				double num3 = 0.0;
				if (simplificationOptions.PreserveSurfaceCurvature)
				{
					num3 = CurvatureError(ref vert0, ref vert1);
				}
				num = VertexError(ref q, result.x, result.y, result.z) + num3;
			}
			else
			{
				Vector3d p =