// Decompiled with JetBrains decompiler
// Type: Terraria.Collision
// Assembly: Terraria, Version=1.4.0.5, Culture=neutral, PublicKeyToken=null
// MVID: 67F9E73E-0A81-4937-A22C-5515CD405A83
// Assembly location: C:\Users\mikeyisbaeyt\Downloads\depotdownloader-2.4.5\depots\105601\6707058\Terraria.exe

using Microsoft.Xna.Framework;
using System;
using System.Collections.Generic;
using Terraria.DataStructures;
using Terraria.ID;

namespace Terraria
{
  public class Collision
  {
    public static bool stair;
    public static bool stairFall;
    public static bool honey;
    public static bool sloping;
    public static bool landMine = false;
    public static bool up;
    public static bool down;
    public static float Epsilon = 2.718282f;

    public static Vector2[] CheckLinevLine(Vector2 a1, Vector2 a2, Vector2 b1, Vector2 b2)
    {
      if (a1.Equals(a2) && b1.Equals(b2))
      {
        if (!a1.Equals(b1))
          return new Vector2[0];
        return new Vector2[1]{ a1 };
      }
      if (b1.Equals(b2))
      {
        if (!Collision.PointOnLine(b1, a1, a2))
          return new Vector2[0];
        return new Vector2[1]{ b1 };
      }
      if (a1.Equals(a2))
      {
        if (!Collision.PointOnLine(a1, b1, b2))
          return new Vector2[0];
        return new Vector2[1]{ a1 };
      }
      float num1 = (float) (((double) b2.X - (double) b1.X) * ((double) a1.Y - (double) b1.Y) - ((double) b2.Y - (double) b1.Y) * ((double) a1.X - (double) b1.X));
      float num2 = (float) (((double) a2.X - (double) a1.X) * ((double) a1.Y - (double) b1.Y) - ((double) a2.Y - (double) a1.Y) * ((double) a1.X - (double) b1.X));
      float num3 = (float) (((double) b2.Y - (double) b1.Y) * ((double) a2.X - (double) a1.X) - ((double) b2.X - (double) b1.X) * ((double) a2.Y - (double) a1.Y));
      if (-(double) Collision.Epsilon >= (double) num3 || (double) num3 >= (double) Collision.Epsilon)
      {
        float num4 = num1 / num3;
        float num5 = num2 / num3;
        if (0.0 > (double) num4 || (double) num4 > 1.0 || 0.0 > (double) num5 || (double) num5 > 1.0)
          return new Vector2[0];
        return new Vector2[1]
        {
          new Vector2(a1.X + num4 * (a2.X - a1.X), a1.Y + num4 * (a2.Y - a1.Y))
        };
      }
      if ((-(double) Collision.Epsilon >= (double) num1 || (double) num1 >= (double) Collision.Epsilon) && (-(double) Collision.Epsilon >= (double) num2 || (double) num2 >= (double) Collision.Epsilon))
        return new Vector2[0];
      return a1.Equals(a2) ? Collision.OneDimensionalIntersection(b1, b2, a1, a2) : Collision.OneDimensionalIntersection(a1, a2, b1, b2);
    }

    private static double DistFromSeg(
      Vector2 p,
      Vector2 q0,
      Vector2 q1,
      double radius,
      ref float u)
    {
      double num1 = (double) q1.X - (double) q0.X;
      double num2 = (double) q1.Y - (double) q0.Y;
      double num3 = (double) q0.X - (double) p.X;
      double num4 = (double) q0.Y - (double) p.Y;
      double num5 = Math.Sqrt(num1 * num1 + num2 * num2);
      if (num5 < (double) Collision.Epsilon)
        throw new Exception("Expected line segment, not point.");
      return Math.Abs(num1 * num4 - num3 * num2) / num5;
    }

    private static bool PointOnLine(Vector2 p, Vector2 a1, Vector2 a2)
    {
      float u = 0.0f;
      return Collision.DistFromSeg(p, a1, a2, (double) Collision.Epsilon, ref u) < (double) Collision.Epsilon;
    }

    private static Vector2[] OneDimensionalIntersection(
      Vector2 a1,
      Vector2 a2,
      Vector2 b1,
      Vector2 b2)
    {
      float num1 = a2.X - a1.X;
      float num2 = a2.Y - a1.Y;
      float relativePoint1;
      float relativePoint2;
      if ((double) Math.Abs(num1) > (double) Math.Abs(num2))
      {
        relativePoint1 = (b1.X - a1.X) / num1;
        relativePoint2 = (b2.X - a1.X) / num1;
      }
      else
      {
        relativePoint1 = (b1.Y - a1.Y) / num2;
        relativePoint2 = (b2.Y - a1.Y) / num2;
      }
      List<Vector2> vector2List = new List<Vector2>();
      foreach (float overlapPoint in Collision.FindOverlapPoints(relativePoint1, relativePoint2))
      {
        float x = (float) ((double) a2.X * (double) overlapPoint + (double) a1.X * (1.0 - (double) overlapPoint));
        float y = (float) ((double) a2.Y * (double) overlapPoint + (double) a1.Y * (1.0 - (double) overlapPoint));
        vector2List.Add(new Vector2(x, y));
      }
      return vector2List.ToArray();
    }

    private static float[] FindOverlapPoints(float relativePoint1, float relativePoint2)
    {
      float val2_1 = Math.Min(relativePoint1, relativePoint2);
      float val2_2 = Math.Max(relativePoint1, relativePoint2);
      float num1 = Math.Max(0.0f, val2_1);
      float num2 = Math.Min(1f, val2_2);
      if ((double) num1 > (double) num2)
        return new float[0];
      return (double) num1 == (double) num2 ? new float[1]
      {
        num1
      } : new float[2]{ num1, num2 };
    }

    public static bool CheckAABBvAABBCollision(
      Vector2 position1,
      Vector2 dimensions1,
      Vector2 position2,
      Vector2 dimensions2)
    {
      return (double) position1.X < (double) position2.X + (double) dimensions2.X && (double) position1.Y < (double) position2.Y + (double) dimensions2.Y && (double) position1.X + (double) dimensions1.X > (double) position2.X && (double) position1.Y + (double) dimensions1.Y > (double) position2.Y;
    }

    private static int collisionOutcode(
      Vector2 aabbPosition,
      Vector2 aabbDimensions,
      Vector2 point)
    {
      float num1 = aabbPosition.X + aabbDimensions.X;
      float num2 = aabbPosition.Y + aabbDimensions.Y;
      int num3 = 0;
      if ((double) aabbDimensions.X <= 0.0)
        num3 |= 5;
      else if ((double) point.X < (double) aabbPosition.X)
        num3 |= 1;
      else if ((double) point.X - (double) num1 > 0.0)
        num3 |= 4;
      if ((double) aabbDimensions.Y <= 0.0)
        num3 |= 10;
      else if ((double) point.Y < (double) aabbPosition.Y)
        num3 |= 2;
      else if ((double) point.Y - (double) num2 > 0.0)
        num3 |= 8;
      return num3;
    }

    public static bool CheckAABBvLineCollision(
      Vector2 aabbPosition,
      Vector2 aabbDimensions,
      Vector2 lineStart,
      Vector2 lineEnd)
    {
      int num1;
      if ((num1 = Collision.collisionOutcode(aabbPosition, aabbDimensions, lineEnd)) == 0)
        return true;
      int num2;
      while ((num2 = Collision.collisionOutcode(aabbPosition, aabbDimensions, lineStart)) != 0)
      {
        if ((num2 & num1) != 0)
          return false;
        if ((num2 & 5) != 0)
        {
          float x = aabbPosition.X;
          if ((num2 & 4) != 0)
            x += aabbDimensions.X;
          lineStart.Y += (float) (((double) x - (double) lineStart.X) * ((double) lineEnd.Y - (double) lineStart.Y) / ((double) lineEnd.X - (double) lineStart.X));
          lineStart.X = x;
        }
        else
        {
          float y = aabbPosition.Y;
          if ((num2 & 8) != 0)
            y += aabbDimensions.Y;
          lineStart.X += (float) (((double) y - (double) lineStart.Y) * ((double) lineEnd.X - (double) lineStart.X) / ((double) lineEnd.Y - (double) lineStart.Y));
          lineStart.Y = y;
        }
      }
      return true;
    }

    public static bool CheckAABBvLineCollision2(
      Vector2 aabbPosition,
      Vector2 aabbDimensions,
      Vector2 lineStart,
      Vector2 lineEnd)
    {
      float collisionPoint = 0.0f;
      return Utils.RectangleLineCollision(aabbPosition, aabbPosition + aabbDimensions, lineStart, lineEnd) || Collision.CheckAABBvLineCollision(aabbPosition, aabbDimensions, lineStart, lineEnd, 0.0001f, ref collisionPoint);
    }

    public static bool CheckAABBvLineCollision(
      Vector2 objectPosition,
      Vector2 objectDimensions,
      Vector2 lineStart,
      Vector2 lineEnd,
      float lineWidth,
      ref float collisionPoint)
    {
      float y = lineWidth * 0.5f;
      Vector2 position2 = lineStart;
      Vector2 dimensions2 = lineEnd - lineStart;
      if ((double) dimensions2.X > 0.0)
      {
        dimensions2.X += lineWidth;
        position2.X -= y;
      }
      else
      {
        position2.X += dimensions2.X - y;
        dimensions2.X = -dimensions2.X + lineWidth;
      }
      if ((double) dimensions2.Y > 0.0)
      {
        dimensions2.Y += lineWidth;
        position2.Y -= y;
      }
      else
      {
        position2.Y += dimensions2.Y - y;
        dimensions2.Y = -dimensions2.Y + lineWidth;
      }
      if (!Collision.CheckAABBvAABBCollision(objectPosition, objectDimensions, position2, dimensions2))
        return false;
      Vector2 spinningpoint1 = objectPosition - lineStart;
      Vector2 spinningpoint2 = spinningpoint1 + objectDimensions;
      Vector2 spinningpoint3 = new Vector2(spinningpoint1.X, spinningpoint2.Y);
      Vector2 spinningpoint4 = new Vector2(spinningpoint2.X, spinningpoint1.Y);
      Vector2 vector2_1 = lineEnd - lineStart;
      float x = vector2_1.Length();
      float num1 = (float) Math.Atan2((double) vector2_1.Y, (double) vector2_1.X);
      Vector2[] vector2Array = new Vector2[4]
      {
        spinningpoint1.RotatedBy(-(double) num1),
        spinningpoint4.RotatedBy(-(double) num1),
        spinningpoint2.RotatedBy(-(double) num1),
        spinningpoint3.RotatedBy(-(double) num1)
      };
      collisionPoint = x;
      bool flag = false;
      for (int index = 0; index < vector2Array.Length; ++index)
      {
        if ((double) Math.Abs(vector2Array[index].Y) < (double) y && (double) vector2Array[index].X < (double) collisionPoint && (double) vector2Array[index].X >= 0.0)
        {
          collisionPoint = vector2Array[index].X;
          flag = true;
        }
      }
      Vector2 vector2_2 = new Vector2(0.0f, y);
      Vector2 vector2_3 = new Vector2(x, y);
      Vector2 vector2_4 = new Vector2(0.0f, -y);
      Vector2 vector2_5 = new Vector2(x, -y);
      for (int index1 = 0; index1 < vector2Array.Length; ++index1)
      {
        int index2 = (index1 + 1) % vector2Array.Length;
        Vector2 vector2_6 = vector2_3 - vector2_2;
        Vector2 vector2_7 = vector2Array[index2] - vector2Array[index1];
        float num2 = (float) ((double) vector2_6.X * (double) vector2_7.Y - (double) vector2_6.Y * (double) vector2_7.X);
        if ((double) num2 != 0.0)
        {
          Vector2 vector2_8 = vector2Array[index1] - vector2_2;
          float num3 = (float) ((double) vector2_8.X * (double) vector2_7.Y - (double) vector2_8.Y * (double) vector2_7.X) / num2;
          if ((double) num3 >= 0.0 && (double) num3 <= 1.0)
          {
            float num4 = (float) ((double) vector2_8.X * (double) vector2_6.Y - (double) vector2_8.Y * (double) vector2_6.X) / num2;
            if ((double) num4 >= 0.0 && (double) num4 <= 1.0)
            {
              flag = true;
              collisionPoint = Math.Min(collisionPoint, vector2_2.X + num3 * vector2_6.X);
            }
          }
        }
        Vector2 vector2_9 = vector2_5 - vector2_4;
        float num5 = (float) ((double) vector2_9.X * (double) vector2_7.Y - (double) vector2_9.Y * (double) vector2_7.X);
        if ((double) num5 != 0.0)
        {
          Vector2 vector2_10 = vector2Array[index1] - vector2_4;
          float num6 = (float) ((double) vector2_10.X * (double) vector2_7.Y - (double) vector2_10.Y * (double) vector2_7.X) / num5;
          if ((double) num6 >= 0.0 && (double) num6 <= 1.0)
          {
            float num7 = (float) ((double) vector2_10.X * (double) vector2_9.Y - (double) vector2_10.Y * (double) vector2_9.X) / num5;
            if ((double) num7 >= 0.0 && (double) num7 <= 1.0)
            {
              flag = true;
              collisionPoint = Math.Min(collisionPoint, vector2_4.X + num6 * vector2_9.X);
            }
          }
        }
      }
      return flag;
    }

    public static bool CanHit(Entity source, Entity target) => Collision.CanHit(source.position, source.width, source.height, target.position, target.width, target.height);

    public static bool CanHit(Entity source, NPCAimedTarget target) => Collision.CanHit(source.position, source.width, source.height, target.Position, target.Width, target.Height);

    public static bool CanHit(
      Vector2 Position1,
      int Width1,
      int Height1,
      Vector2 Position2,
      int Width2,
      int Height2)
    {
      int index1 = (int) (((double) Position1.X + (double) (Width1 / 2)) / 16.0);
      int index2 = (int) (((double) Position1.Y + (double) (Height1 / 2)) / 16.0);
      int num1 = (int) (((double) Position2.X + (double) (Width2 / 2)) / 16.0);
      int num2 = (int) (((double) Position2.Y + (double) (Height2 / 2)) / 16.0);
      if (index1 <= 1)
        index1 = 1;
      if (index1 >= Main.maxTilesX)
        index1 = Main.maxTilesX - 1;
      if (num1 <= 1)
        num1 = 1;
      if (num1 >= Main.maxTilesX)
        num1 = Main.maxTilesX - 1;
      if (index2 <= 1)
        index2 = 1;
      if (index2 >= Main.maxTilesY)
        index2 = Main.maxTilesY - 1;
      if (num2 <= 1)
        num2 = 1;
      if (num2 >= Main.maxTilesY)
        num2 = Main.maxTilesY - 1;
      try
      {
        do
        {
          int num3 = Math.Abs(index1 - num1);
          int num4 = Math.Abs(index2 - num2);
          if (index1 == num1 && index2 == num2)
            return true;
          if (num3 > num4)
          {
            if (index1 < num1)
              ++index1;
            else
              --index1;
            if (Main.tile[index1, index2 - 1] == null || Main.tile[index1, index2 + 1] == null || !Main.tile[index1, index2 - 1].inActive() && Main.tile[index1, index2 - 1].active() && Main.tileSolid[(int) Main.tile[index1, index2 - 1].type] && !Main.tileSolidTop[(int) Main.tile[index1, index2 - 1].type] && Main.tile[index1, index2 - 1].slope() == (byte) 0 && !Main.tile[index1, index2 - 1].halfBrick() && !Main.tile[index1, index2 + 1].inActive() && Main.tile[index1, index2 + 1].active() && Main.tileSolid[(int) Main.tile[index1, index2 + 1].type] && !Main.tileSolidTop[(int) Main.tile[index1, index2 + 1].type] && Main.tile[index1, index2 + 1].slope() == (byte) 0 && !Main.tile[index1, index2 + 1].halfBrick())
              return false;
          }
          else
          {
            if (index2 < num2)
              ++index2;
            else
              --index2;
            if (Main.tile[index1 - 1, index2] == null || Main.tile[index1 + 1, index2] == null || !Main.tile[index1 - 1, index2].inActive() && Main.tile[index1 - 1, index2].active() && Main.tileSolid[(int) Main.tile[index1 - 1, index2].type] && !Main.tileSolidTop[(int) Main.tile[index1 - 1, index2].type] && Main.tile[index1 - 1, index2].slope() == (byte) 0 && !Main.tile[index1 - 1, index2].halfBrick() && !Main.tile[index1 + 1, index2].inActive() && Main.tile[index1 + 1, index2].active() && Main.tileSolid[(int) Main.tile[index1 + 1, index2].type] && !Main.tileSolidTop[(int) Main.tile[index1 + 1, index2].type] && Main.tile[index1 + 1, index2].slope() == (byte) 0 && !Main.tile[index1 + 1, index2].halfBrick())
              return false;
          }
        }
        while (Main.tile[index1, index2] != null && (Main.tile[index1, index2].inActive() || !Main.tile[index1, index2].active() || !Main.tileSolid[(int) Main.tile[index1, index2].type] || Main.tileSolidTop[(int) Main.tile[index1, index2].type]));
        return false;
      }
      catch
      {
        return false;
      }
    }

    public static bool CanHitWithCheck(
      Vector2 Position1,
      int Width1,
      int Height1,
      Vector2 Position2,
      int Width2,
      int Height2,
      Utils.TileActionAttempt check)
    {
      int x = (int) (((double) Position1.X + (double) (Width1 / 2)) / 16.0);
      int y = (int) (((double) Position1.Y + (double) (Height1 / 2)) / 16.0);
      int num1 = (int) (((double) Position2.X + (double) (Width2 / 2)) / 16.0);
      int num2 = (int) (((double) Position2.Y + (double) (Height2 / 2)) / 16.0);
      if (x <= 1)
        x = 1;
      if (x >= Main.maxTilesX)
        x = Main.maxTilesX - 1;
      if (num1 <= 1)
        num1 = 1;
      if (num1 >= Main.maxTilesX)
        num1 = Main.maxTilesX - 1;
      if (y <= 1)
        y = 1;
      if (y >= Main.maxTilesY)
        y = Main.maxTilesY - 1;
      if (num2 <= 1)
        num2 = 1;
      if (num2 >= Main.maxTilesY)
        num2 = Main.maxTilesY - 1;
      try
      {
        do
        {
          int num3 = Math.Abs(x - num1);
          int num4 = Math.Abs(y - num2);
          if (x == num1 && y == num2)
            return true;
          if (num3 > num4)
          {
            if (x < num1)
              ++x;
            else
              --x;
            if (Main.tile[x, y - 1] == null || Main.tile[x, y + 1] == null || !Main.tile[x, y - 1].inActive() && Main.tile[x, y - 1].active() && Main.tileSolid[(int) Main.tile[x, y - 1].type] && !Main.tileSolidTop[(int) Main.tile[x, y - 1].type] && Main.tile[x, y - 1].slope() == (byte) 0 && !Main.tile[x, y - 1].halfBrick() && !Main.tile[x, y + 1].inActive() && Main.tile[x, y + 1].active() && Main.tileSolid[(int) Main.tile[x, y + 1].type] && !Main.tileSolidTop[(int) Main.tile[x, y + 1].type] && Main.tile[x, y + 1].slope() == (byte) 0 && !Main.tile[x, y + 1].halfBrick())
              return false;
          }
          else
          {
            if (y < num2)
              ++y;
            else
              --y;
            if (Main.tile[x - 1, y] == null || Main.tile[x + 1, y] == null || !Main.tile[x - 1, y].inActive() && Main.tile[x - 1, y].active() && Main.tileSolid[(int) Main.tile[x - 1, y].type] && !Main.tileSolidTop[(int) Main.tile[x - 1, y].type] && Main.tile[x - 1, y].slope() == (byte) 0 && !Main.tile[x - 1, y].halfBrick() && !Main.tile[x + 1, y].inActive() && Main.tile[x + 1, y].active() && Main.tileSolid[(int) Main.tile[x + 1, y].type] && !Main.tileSolidTop[(int) Main.tile[x + 1, y].type] && Main.tile[x + 1, y].slope() == (byte) 0 && !Main.tile[x + 1, y].halfBrick())
              return false;
          }
        }
        while (Main.tile[x, y] != null && (Main.tile[x, y].inActive() || !Main.tile[x, y].active() || !Main.tileSolid[(int) Main.tile[x, y].type] || Main.tileSolidTop[(int) Main.tile[x, y].type]) && check(x, y));
        return false;
      }
      catch
      {
        return false;
      }
    }

    public static bool CanHitLine(
      Vector2 Position1,
      int Width1,
      int Height1,
      Vector2 Position2,
      int Width2,
      int Height2)
    {
      int index1 = (int) (((double) Position1.X + (double) (Width1 / 2)) / 16.0);
      int index2 = (int) (((double) Position1.Y + (double) (Height1 / 2)) / 16.0);
      int num1 = (int) (((double) Position2.X + (double) (Width2 / 2)) / 16.0);
      int num2 = (int) (((double) Position2.Y + (double) (Height2 / 2)) / 16.0);
      if (index1 <= 1)
        index1 = 1;
      if (index1 >= Main.maxTilesX)
        index1 = Main.maxTilesX - 1;
      if (num1 <= 1)
        num1 = 1;
      if (num1 >= Main.maxTilesX)
        num1 = Main.maxTilesX - 1;
      if (index2 <= 1)
        index2 = 1;
      if (index2 >= Main.maxTilesY)
        index2 = Main.maxTilesY - 1;
      if (num2 <= 1)
        num2 = 1;
      if (num2 >= Main.maxTilesY)
        num2 = Main.maxTilesY - 1;
      float num3 = (float) Math.Abs(index1 - num1);
      float num4 = (float) Math.Abs(index2 - num2);
      if ((double) num3 == 0.0 && (double) num4 == 0.0)
        return true;
      float num5 = 1f;
      float num6 = 1f;
      if ((double) num3 == 0.0 || (double) num4 == 0.0)
      {
        if ((double) num3 == 0.0)
          num5 = 0.0f;
        if ((double) num4 == 0.0)
          num6 = 0.0f;
      }
      else if ((double) num3 > (double) num4)
        num5 = num3 / num4;
      else
        num6 = num4 / num3;
      float num7 = 0.0f;
      float num8 = 0.0f;
      int num9 = 1;
      if (index2 < num2)
        num9 = 2;
      int num10 = (int) num3;
      int num11 = (int) num4;
      int num12 = Math.Sign(num1 - index1);
      int num13 = Math.Sign(num2 - index2);
      bool flag1 = false;
      bool flag2 = false;
      try
      {
        do
        {
          switch (num9)
          {
            case 1:
              float num14 = num8 + num6;
              int num15 = (int) num14;
              num8 = num14 % 1f;
              for (int index3 = 0; index3 < num15; ++index3)
              {
                if (Main.tile[index1 - 1, index2] == null || Main.tile[index1, index2] == null || Main.tile[index1 + 1, index2] == null)
                  return false;
                Tile tile1 = Main.tile[index1 - 1, index2];
                Tile tile2 = Main.tile[index1 + 1, index2];
                Tile tile3 = Main.tile[index1, index2];
                if (!tile1.inActive() && tile1.active() && Main.tileSolid[(int) tile1.type] && !Main.tileSolidTop[(int) tile1.type] || !tile2.inActive() && tile2.active() && Main.tileSolid[(int) tile2.type] && !Main.tileSolidTop[(int) tile2.type] || !tile3.inActive() && tile3.active() && Main.tileSolid[(int) tile3.type] && !Main.tileSolidTop[(int) tile3.type])
                  return false;
                if (num10 == 0 && num11 == 0)
                {
                  flag1 = true;
                  break;
                }
                index2 += num13;
                --num11;
                if (num10 == 0 && num11 == 0 && num15 == 1)
                  flag2 = true;
              }
              if (num10 != 0)
              {
                num9 = 2;
                break;
              }
              break;
            case 2:
              float num16 = num7 + num5;
              int num17 = (int) num16;
              num7 = num16 % 1f;
              for (int index4 = 0; index4 < num17; ++index4)
              {
                if (Main.tile[index1, index2 - 1] == null || Main.tile[index1, index2] == null || Main.tile[index1, index2 + 1] == null)
                  return false;
                Tile tile4 = Main.tile[index1, index2 - 1];
                Tile tile5 = Main.tile[index1, index2 + 1];
                Tile tile6 = Main.tile[index1, index2];
                if (!tile4.inActive() && tile4.active() && Main.tileSolid[(int) tile4.type] && !Main.tileSolidTop[(int) tile4.type] || !tile5.inActive() && tile5.active() && Main.tileSolid[(int) tile5.type] && !Main.tileSolidTop[(int) tile5.type] || !tile6.inActive() && tile6.active() && Main.tileSolid[(int) tile6.type] && !Main.tileSolidTop[(int) tile6.type])
                  return false;
                if (num10 == 0 && num11 == 0)
                {
                  flag1 = true;
                  break;
                }
                index1 += num12;
                --num10;
                if (num10 == 0 && num11 == 0 && num17 == 1)
                  flag2 = true;
              }
              if (num11 != 0)
              {
                num9 = 1;
                break;
              }
              break;
          }
          if (Main.tile[index1, index2] == null)
            return false;
          Tile tile = Main.tile[index1, index2];
          if (!tile.inActive() && tile.active() && Main.tileSolid[(int) tile.type] && !Main.tileSolidTop[(int) tile.type])
            return false;
        }
        while (!(flag1 | flag2));
        return true;
      }
      catch
      {
        return false;
      }
    }

    public static bool TupleHitLine(
      int x1,
      int y1,
      int x2,
      int y2,
      int ignoreX,
      int ignoreY,
      List<Tuple<int, int>> ignoreTargets,
      out Tuple<int, int> col)
    {
      int num1 = x1;
      int num2 = y1;
      int num3 = x2;
      int num4 = y2;
      int index1 = Utils.Clamp<int>(num1, 1, Main.maxTilesX - 1);
      int num5 = Utils.Clamp<int>(num3, 1, Main.maxTilesX - 1);
      int index2 = Utils.Clamp<int>(num2, 1, Main.maxTilesY - 1);
      int num6 = Utils.Clamp<int>(num4, 1, Main.maxTilesY - 1);
      float num7 = (float) Math.Abs(index1 - num5);
      float num8 = (float) Math.Abs(index2 - num6);
      if ((double) num7 == 0.0 && (double) num8 == 0.0)
      {
        col = new Tuple<int, int>(index1, index2);
        return true;
      }
      float num9 = 1f;
      float num10 = 1f;
      if ((double) num7 == 0.0 || (double) num8 == 0.0)
      {
        if ((double) num7 == 0.0)
          num9 = 0.0f;
        if ((double) num8 == 0.0)
          num10 = 0.0f;
      }
      else if ((double) num7 > (double) num8)
        num9 = num7 / num8;
      else
        num10 = num8 / num7;
      float num11 = 0.0f;
      float num12 = 0.0f;
      int num13 = 1;
      if (index2 < num6)
        num13 = 2;
      int num14 = (int) num7;
      int num15 = (int) num8;
      int num16 = Math.Sign(num5 - index1);
      int num17 = Math.Sign(num6 - index2);
      bool flag1 = false;
      bool flag2 = false;
      try
      {
        do
        {
          switch (num13)
          {
            case 1:
              float num18 = num12 + num10;
              int num19 = (int) num18;
              num12 = num18 % 1f;
              for (int index3 = 0; index3 < num19; ++index3)
              {
                if (Main.tile[index1 - 1, index2] == null)
                {
                  col = new Tuple<int, int>(index1 - 1, index2);
                  return false;
                }
                if (Main.tile[index1 + 1, index2] == null)
                {
                  col = new Tuple<int, int>(index1 + 1, index2);
                  return false;
                }
                Tile tile1 = Main.tile[index1 - 1, index2];
                Tile tile2 = Main.tile[index1 + 1, index2];
                Tile tile3 = Main.tile[index1, index2];
                if (!ignoreTargets.Contains(new Tuple<int, int>(index1, index2)) && !ignoreTargets.Contains(new Tuple<int, int>(index1 - 1, index2)) && !ignoreTargets.Contains(new Tuple<int, int>(index1 + 1, index2)))
                {
                  if (ignoreX != -1 && num16 < 0 && !tile1.inActive() && tile1.active() && Main.tileSolid[(int) tile1.type] && !Main.tileSolidTop[(int) tile1.type])
                  {
                    col = new Tuple<int, int>(index1 - 1, index2);
                    return true;
                  }
                  if (ignoreX != 1 && num16 > 0 && !tile2.inActive() && tile2.active() && Main.tileSolid[(int) tile2.type] && !Main.tileSolidTop[(int) tile2.type])
                  {
                    col = new Tuple<int, int>(index1 + 1, index2);
                    return true;
                  }
                  if (!tile3.inActive() && tile3.active() && Main.tileSolid[(int) tile3.type] && !Main.tileSolidTop[(int) tile3.type])
                  {
                    col = new Tuple<int, int>(index1, index2);
                    return true;
                  }
                }
                if (num14 == 0 && num15 == 0)
                {
                  flag1 = true;
                  break;
                }
                index2 += num17;
                --num15;
                if (num14 == 0 && num15 == 0 && num19 == 1)
                  flag2 = true;
              }
              if (num14 != 0)
              {
                num13 = 2;
                break;
              }
              break;
            case 2:
              float num20 = num11 + num9;
              int num21 = (int) num20;
              num11 = num20 % 1f;
              for (int index4 = 0; index4 < num21; ++index4)
              {
                if (Main.tile[index1, index2 - 1] == null)
                {
                  col = new Tuple<int, int>(index1, index2 - 1);
                  return false;
                }
                if (Main.tile[index1, index2 + 1] == null)
                {
                  col = new Tuple<int, int>(index1, index2 + 1);
                  return false;
                }
                Tile tile4 = Main.tile[index1, index2 - 1];
                Tile tile5 = Main.tile[index1, index2 + 1];
                Tile tile6 = Main.tile[index1, index2];
                if (!ignoreTargets.Contains(new Tuple<int, int>(index1, index2)) && !ignoreTargets.Contains(new Tuple<int, int>(index1, index2 - 1)) && !ignoreTargets.Contains(new Tuple<int, int>(index1, index2 + 1)))
                {
                  if (ignoreY != -1 && num17 < 0 && !tile4.inActive() && tile4.active() && Main.tileSolid[(int) tile4.type] && !Main.tileSolidTop[(int) tile4.type])
                  {
                    col = new Tuple<int, int>(index1, index2 - 1);
                    return true;
                  }
                  if (ignoreY != 1 && num17 > 0 && !tile5.inActive() && tile5.active() && Main.tileSolid[(int) tile5.type] && !Main.tileSolidTop[(int) tile5.type])
                  {
                    col = new Tuple<int, int>(index1, index2 + 1);
                    return true;
                  }
                  if (!tile6.inActive() && tile6.active() && Main.tileSolid[(int) tile6.type] && !Main.tileSolidTop[(int) tile6.type])
                  {
                    col = new Tuple<int, int>(index1, index2);
                    return true;
                  }
                }
                if (num14 == 0 && num15 == 0)
                {
                  flag1 = true;
                  break;
                }
                index1 += num16;
                --num14;
                if (num14 == 0 && num15 == 0 && num21 == 1)
                  flag2 = true;
              }
              if (num15 != 0)
              {
                num13 = 1;
                break;
              }
              break;
          }
          if (Main.tile[index1, index2] == null)
          {
            col = new Tuple<int, int>(index1, index2);
            return false;
          }
          Tile tile = Main.tile[index1, index2];
          if (!ignoreTargets.Contains(new Tuple<int, int>(index1, index2)) && !tile.inActive() && tile.active() && Main.tileSolid[(int) tile.type] && !Main.tileSolidTop[(int) tile.type])
          {
            col = new Tuple<int, int>(index1, index2);
            return true;
          }
        }
        while (!(flag1 | flag2));
        col = new Tuple<int, int>(index1, index2);
        return true;
      }
      catch
      {
        col = new Tuple<int, int>(x1, y1);
        return false;
      }
    }

    public static Tuple<int, int> TupleHitLineWall(int x1, int y1, int x2, int y2)
    {
      int x = x1;
      int y = y1;
      int num1 = x2;
      int num2 = y2;
      if (x <= 1)
        x = 1;
      if (x >= Main.maxTilesX)
        x = Main.maxTilesX - 1;
      if (num1 <= 1)
        num1 = 1;
      if (num1 >= Main.maxTilesX)
        num1 = Main.maxTilesX - 1;
      if (y <= 1)
        y = 1;
      if (y >= Main.maxTilesY)
        y = Main.maxTilesY - 1;
      if (num2 <= 1)
        num2 = 1;
      if (num2 >= Main.maxTilesY)
        num2 = Main.maxTilesY - 1;
      float num3 = (float) Math.Abs(x - num1);
      float num4 = (float) Math.Abs(y - num2);
      if ((double) num3 == 0.0 && (double) num4 == 0.0)
        return new Tuple<int, int>(x, y);
      float num5 = 1f;
      float num6 = 1f;
      if ((double) num3 == 0.0 || (double) num4 == 0.0)
      {
        if ((double) num3 == 0.0)
          num5 = 0.0f;
        if ((double) num4 == 0.0)
          num6 = 0.0f;
      }
      else if ((double) num3 > (double) num4)
        num5 = num3 / num4;
      else
        num6 = num4 / num3;
      float num7 = 0.0f;
      float num8 = 0.0f;
      int num9 = 1;
      if (y < num2)
        num9 = 2;
      int num10 = (int) num3;
      int num11 = (int) num4;
      int num12 = Math.Sign(num1 - x);
      int num13 = Math.Sign(num2 - y);
      bool flag1 = false;
      bool flag2 = false;
      try
      {
        do
        {
          switch (num9)
          {
            case 1:
              float num14 = num8 + num6;
              int num15 = (int) num14;
              num8 = num14 % 1f;
              for (int index = 0; index < num15; ++index)
              {
                Tile tile = Main.tile[x, y];
                if (Collision.HitWallSubstep(x, y))
                  return new Tuple<int, int>(x, y);
                if (num10 == 0 && num11 == 0)
                {
                  flag1 = true;
                  break;
                }
                y += num13;
                --num11;
                if (num10 == 0 && num11 == 0 && num15 == 1)
                  flag2 = true;
              }
              if (num10 != 0)
              {
                num9 = 2;
                break;
              }
              break;
            case 2:
              float num16 = num7 + num5;
              int num17 = (int) num16;
              num7 = num16 % 1f;
              for (int index = 0; index < num17; ++index)
              {
                Tile tile = Main.tile[x, y];
                if (Collision.HitWallSubstep(x, y))
                  return new Tuple<int, int>(x, y);
                if (num10 == 0 && num11 == 0)
                {
                  flag1 = true;
                  break;
                }
                x += num12;
                --num10;
                if (num10 == 0 && num11 == 0 && num17 == 1)
                  flag2 = true;
              }
              if (num11 != 0)
              {
                num9 = 1;
                break;
              }
              break;
          }
          if (Main.tile[x, y] == null)
            return new Tuple<int, int>(-1, -1);
          Tile tile1 = Main.tile[x, y];
          if (Collision.HitWallSubstep(x, y))
            return new Tuple<int, int>(x, y);
        }
        while (!(flag1 | flag2));
        return new Tuple<int, int>(x, y);
      }
      catch
      {
        return new Tuple<int, int>(-1, -1);
      }
    }

    public static bool HitWallSubstep(int x, int y)
    {
      if (Main.tile[x, y].wall == (ushort) 0)
        return false;
      bool flag1 = false;
      if (Main.wallHouse[(int) Main.tile[x, y].wall])
        flag1 = true;
      if (!flag1)
      {
        for (int index1 = -1; index1 < 2; ++index1)
        {
          for (int index2 = -1; index2 < 2; ++index2)
          {
            if ((index1 != 0 || index2 != 0) && Main.tile[x + index1, y + index2].wall == (ushort) 0)
              flag1 = true;
          }
        }
      }
      if (Main.tile[x, y].active() & flag1)
      {
        bool flag2 = true;
        for (int index3 = -1; index3 < 2; ++index3)
        {
          for (int index4 = -1; index4 < 2; ++index4)
          {
            if (index3 != 0 || index4 != 0)
            {
              Tile tile = Main.tile[x + index3, y + index4];
              if (!tile.active() || !Main.tileSolid[(int) tile.type] || Main.tileSolidTop[(int) tile.type])
                flag2 = false;
            }
          }
        }
        if (flag2)
          flag1 = false;
      }
      return flag1;
    }

    public static bool EmptyTile(int i, int j, bool ignoreTiles = false)
    {
      Rectangle rectangle = new Rectangle(i * 16, j * 16, 16, 16);
      if (Main.tile[i, j].active() && !ignoreTiles)
        return false;
      for (int index = 0; index < (int) byte.MaxValue; ++index)
      {
        if (Main.player[index].active && rectangle.Intersects(new Rectangle((int) Main.player[index].position.X, (int) Main.player[index].position.Y, Main.player[index].width, Main.player[index].height)))
          return false;
      }
      for (int index = 0; index < 200; ++index)
      {
        if (Main.npc[index].active && rectangle.Intersects(new Rectangle((int) Main.npc[index].position.X, (int) Main.npc[index].position.Y, Main.npc[index].width, Main.npc[index].height)))
          return false;
      }
      return true;
    }

    public static bool DrownCollision(
      Vector2 Position,
      int Width,
      int Height,
      float gravDir = -1f,
      bool includeSlopes = false)
    {
      Vector2 vector2_1 = new Vector2(Position.X + (float) (Width / 2), Position.Y + (float) (Height / 2));
      int num1 = 10;
      int num2 = 12;
      if (num1 > Width)
        num1 = Width;
      if (num2 > Height)
        num2 = Height;
      vector2_1 = new Vector2(vector2_1.X - (float) (num1 / 2), Position.Y - 2f);
      if ((double) gravDir == -1.0)
        vector2_1.Y += (float) (Height / 2 - 6);
      int num3 = (int) ((double) Position.X / 16.0) - 1;
      int num4 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num5 = (int) ((double) Position.Y / 16.0) - 1;
      int num6 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num7 = Utils.Clamp<int>(num3, 0, max);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesX - 1);
      int num9 = Utils.Clamp<int>(num5, 0, Main.maxTilesY - 1);
      int num10 = Utils.Clamp<int>(num6, 0, Main.maxTilesY - 1);
      int num11 = (double) gravDir == 1.0 ? num9 : num10 - 1;
      for (int index1 = num7; index1 < num8; ++index1)
      {
        for (int index2 = num9; index2 < num10; ++index2)
        {
          Tile tile = Main.tile[index1, index2];
          if (tile != null && tile.liquid > (byte) 0 && !tile.lava() && (index2 != num11 || !tile.active() || !Main.tileSolid[(int) tile.type] || Main.tileSolidTop[(int) tile.type] || includeSlopes && tile.blockType() != 0))
          {
            Vector2 vector2_2;
            vector2_2.X = (float) (index1 * 16);
            vector2_2.Y = (float) (index2 * 16);
            int num12 = 16;
            float num13 = (float) (256 - (int) Main.tile[index1, index2].liquid) / 32f;
            vector2_2.Y += num13 * 2f;
            int num14 = num12 - (int) ((double) num13 * 2.0);
            if ((double) vector2_1.X + (double) num1 > (double) vector2_2.X && (double) vector2_1.X < (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) num2 > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + (double) num14)
              return true;
          }
        }
      }
      return false;
    }

    public static bool IsWorldPointSolid(Vector2 pos)
    {
      Point tileCoordinates = pos.ToTileCoordinates();
      if (!WorldGen.InWorld(tileCoordinates.X, tileCoordinates.Y, 1))
        return false;
      Tile tile = Main.tile[tileCoordinates.X, tileCoordinates.Y];
      if (tile == null || !tile.active() || tile.inActive() || !Main.tileSolid[(int) tile.type])
        return false;
      int num1 = tile.blockType();
      switch (num1)
      {
        case 0:
          return (double) pos.X >= (double) (tileCoordinates.X * 16) && (double) pos.X <= (double) (tileCoordinates.X * 16 + 16) && (double) pos.Y >= (double) (tileCoordinates.Y * 16) && (double) pos.Y <= (double) (tileCoordinates.Y * 16 + 16);
        case 1:
          return (double) pos.X >= (double) (tileCoordinates.X * 16) && (double) pos.X <= (double) (tileCoordinates.X * 16 + 16) && (double) pos.Y >= (double) (tileCoordinates.Y * 16 + 8) && (double) pos.Y <= (double) (tileCoordinates.Y * 16 + 16);
        case 2:
        case 3:
        case 4:
        case 5:
          if ((double) pos.X < (double) (tileCoordinates.X * 16) && (double) pos.X > (double) (tileCoordinates.X * 16 + 16) && (double) pos.Y < (double) (tileCoordinates.Y * 16) && (double) pos.Y > (double) (tileCoordinates.Y * 16 + 16))
            return false;
          float num2 = pos.X % 16f;
          float num3 = pos.Y % 16f;
          switch (num1)
          {
            case 2:
              return (double) num3 >= (double) num2;
            case 3:
              return (double) num2 + (double) num3 >= 16.0;
            case 4:
              return (double) num2 + (double) num3 <= 16.0;
            case 5:
              return (double) num3 <= (double) num2;
          }
          break;
      }
      return false;
    }

    public static bool GetWaterLine(Point pt, out float waterLineHeight) => Collision.GetWaterLine(pt.X, pt.Y, out waterLineHeight);

    public static bool GetWaterLine(int X, int Y, out float waterLineHeight)
    {
      waterLineHeight = 0.0f;
      if (Main.tile[X, Y - 2] == null)
        Main.tile[X, Y - 2] = new Tile();
      if (Main.tile[X, Y - 1] == null)
        Main.tile[X, Y - 1] = new Tile();
      if (Main.tile[X, Y] == null)
        Main.tile[X, Y] = new Tile();
      if (Main.tile[X, Y + 1] == null)
        Main.tile[X, Y + 1] = new Tile();
      if (Main.tile[X, Y - 2].liquid > (byte) 0)
        return false;
      if (Main.tile[X, Y - 1].liquid > (byte) 0)
      {
        waterLineHeight = (float) (Y * 16);
        waterLineHeight -= (float) ((int) Main.tile[X, Y - 1].liquid / 16);
        return true;
      }
      if (Main.tile[X, Y].liquid > (byte) 0)
      {
        waterLineHeight = (float) ((Y + 1) * 16);
        waterLineHeight -= (float) ((int) Main.tile[X, Y].liquid / 16);
        return true;
      }
      if (Main.tile[X, Y + 1].liquid <= (byte) 0)
        return false;
      waterLineHeight = (float) ((Y + 2) * 16);
      waterLineHeight -= (float) ((int) Main.tile[X, Y + 1].liquid / 16);
      return true;
    }

    public static bool GetWaterLineIterate(Point pt, out float waterLineHeight) => Collision.GetWaterLineIterate(pt.X, pt.Y, out waterLineHeight);

    public static bool GetWaterLineIterate(int X, int Y, out float waterLineHeight)
    {
      waterLineHeight = 0.0f;
      while (Y > 0 && Framing.GetTileSafely(X, Y).liquid > (byte) 0)
        --Y;
      ++Y;
      if (Main.tile[X, Y] == null)
        Main.tile[X, Y] = new Tile();
      if (Main.tile[X, Y].liquid <= (byte) 0)
        return false;
      waterLineHeight = (float) (Y * 16);
      waterLineHeight -= (float) ((int) Main.tile[X, Y - 1].liquid / 16);
      return true;
    }

    public static bool WetCollision(Vector2 Position, int Width, int Height)
    {
      Collision.honey = false;
      Vector2 vector2_1 = new Vector2(Position.X + (float) (Width / 2), Position.Y + (float) (Height / 2));
      int num1 = 10;
      int num2 = Height / 2;
      if (num1 > Width)
        num1 = Width;
      if (num2 > Height)
        num2 = Height;
      vector2_1 = new Vector2(vector2_1.X - (float) (num1 / 2), vector2_1.Y - (float) (num2 / 2));
      int num3 = (int) ((double) Position.X / 16.0) - 1;
      int num4 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num5 = (int) ((double) Position.Y / 16.0) - 1;
      int num6 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num7 = Utils.Clamp<int>(num3, 0, max);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesX - 1);
      int num9 = Utils.Clamp<int>(num5, 0, Main.maxTilesY - 1);
      int num10 = Utils.Clamp<int>(num6, 0, Main.maxTilesY - 1);
      Vector2 vector2_2;
      for (int index1 = num7; index1 < num8; ++index1)
      {
        for (int index2 = num9; index2 < num10; ++index2)
        {
          if (Main.tile[index1, index2] != null)
          {
            if (Main.tile[index1, index2].liquid > (byte) 0)
            {
              vector2_2.X = (float) (index1 * 16);
              vector2_2.Y = (float) (index2 * 16);
              int num11 = 16;
              float num12 = (float) (256 - (int) Main.tile[index1, index2].liquid) / 32f;
              vector2_2.Y += num12 * 2f;
              int num13 = num11 - (int) ((double) num12 * 2.0);
              if ((double) vector2_1.X + (double) num1 > (double) vector2_2.X && (double) vector2_1.X < (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) num2 > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + (double) num13)
              {
                if (Main.tile[index1, index2].honey())
                  Collision.honey = true;
                return true;
              }
            }
            else if (Main.tile[index1, index2].active() && Main.tile[index1, index2].slope() != (byte) 0 && index2 > 0 && Main.tile[index1, index2 - 1] != null && Main.tile[index1, index2 - 1].liquid > (byte) 0)
            {
              vector2_2.X = (float) (index1 * 16);
              vector2_2.Y = (float) (index2 * 16);
              int num14 = 16;
              if ((double) vector2_1.X + (double) num1 > (double) vector2_2.X && (double) vector2_1.X < (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) num2 > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + (double) num14)
              {
                if (Main.tile[index1, index2 - 1].honey())
                  Collision.honey = true;
                return true;
              }
            }
          }
        }
      }
      return false;
    }

    public static bool LavaCollision(Vector2 Position, int Width, int Height)
    {
      int num1 = Height;
      int num2 = (int) ((double) Position.X / 16.0) - 1;
      int num3 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num4 = (int) ((double) Position.Y / 16.0) - 1;
      int num5 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num6 = Utils.Clamp<int>(num2, 0, max);
      int num7 = Utils.Clamp<int>(num3, 0, Main.maxTilesX - 1);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      int num9 = Utils.Clamp<int>(num5, 0, Main.maxTilesY - 1);
      for (int index1 = num6; index1 < num7; ++index1)
      {
        for (int index2 = num8; index2 < num9; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].liquid > (byte) 0 && Main.tile[index1, index2].lava())
          {
            Vector2 vector2;
            vector2.X = (float) (index1 * 16);
            vector2.Y = (float) (index2 * 16);
            int num10 = 16;
            float num11 = (float) (256 - (int) Main.tile[index1, index2].liquid) / 32f;
            vector2.Y += num11 * 2f;
            int num12 = num10 - (int) ((double) num11 * 2.0);
            if ((double) Position.X + (double) Width > (double) vector2.X && (double) Position.X < (double) vector2.X + 16.0 && (double) Position.Y + (double) num1 > (double) vector2.Y && (double) Position.Y < (double) vector2.Y + (double) num12)
              return true;
          }
        }
      }
      return false;
    }

    public static Vector4 WalkDownSlope(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      float gravity = 0.0f)
    {
      if ((double) Velocity.Y != (double) gravity)
        return new Vector4(Position, Velocity.X, Velocity.Y);
      Vector2 vector2_1 = Position;
      int num1 = (int) ((double) vector2_1.X / 16.0);
      int num2 = (int) (((double) vector2_1.X + (double) Width) / 16.0);
      int num3 = (int) (((double) Position.Y + (double) Height + 4.0) / 16.0);
      int num4 = Utils.Clamp<int>(num1, 0, Main.maxTilesX - 1);
      int num5 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num6 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 3);
      float num7 = (float) ((num6 + 3) * 16);
      int index1 = -1;
      int index2 = -1;
      int num8 = 1;
      if ((double) Velocity.X < 0.0)
        num8 = 2;
      for (int index3 = num4; index3 <= num5; ++index3)
      {
        for (int index4 = num6; index4 <= num6 + 1; ++index4)
        {
          if (Main.tile[index3, index4] == null)
            Main.tile[index3, index4] = new Tile();
          if (Main.tile[index3, index4].nactive() && (Main.tileSolid[(int) Main.tile[index3, index4].type] || Main.tileSolidTop[(int) Main.tile[index3, index4].type]))
          {
            int num9 = index4 * 16;
            if (Main.tile[index3, index4].halfBrick())
              num9 += 8;
            if (new Rectangle(index3 * 16, index4 * 16 - 17, 16, 16).Intersects(new Rectangle((int) Position.X, (int) Position.Y, Width, Height)) && (double) num9 <= (double) num7)
            {
              if ((double) num7 == (double) num9)
              {
                if (Main.tile[index3, index4].slope() != (byte) 0)
                {
                  if (index1 != -1 && index2 != -1 && Main.tile[index1, index2] != null && Main.tile[index1, index2].slope() != (byte) 0)
                  {
                    if ((int) Main.tile[index3, index4].slope() == num8)
                    {
                      num7 = (float) num9;
                      index1 = index3;
                      index2 = index4;
                    }
                  }
                  else
                  {
                    num7 = (float) num9;
                    index1 = index3;
                    index2 = index4;
                  }
                }
              }
              else
              {
                num7 = (float) num9;
                index1 = index3;
                index2 = index4;
              }
            }
          }
        }
      }
      int index5 = index1;
      int index6 = index2;
      if (index1 != -1 && index2 != -1 && Main.tile[index5, index6] != null && Main.tile[index5, index6].slope() > (byte) 0)
      {
        int num10 = (int) Main.tile[index5, index6].slope();
        Vector2 vector2_2;
        vector2_2.X = (float) (index5 * 16);
        vector2_2.Y = (float) (index6 * 16);
        switch (num10)
        {
          case 1:
            float num11 = Position.X - vector2_2.X;
            if ((double) Position.Y + (double) Height >= (double) vector2_2.Y + (double) num11 && (double) Velocity.X > 0.0)
            {
              Velocity.Y += Math.Abs(Velocity.X);
              break;
            }
            break;
          case 2:
            float num12 = (float) ((double) vector2_2.X + 16.0 - ((double) Position.X + (double) Width));
            if ((double) Position.Y + (double) Height >= (double) vector2_2.Y + (double) num12 && (double) Velocity.X < 0.0)
            {
              Velocity.Y += Math.Abs(Velocity.X);
              break;
            }
            break;
        }
      }
      return new Vector4(Position, Velocity.X, Velocity.Y);
    }

    public static Vector4 SlopeCollision(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      float gravity = 0.0f,
      bool fall = false)
    {
      Collision.stair = false;
      Collision.stairFall = false;
      bool[] flagArray = new bool[5];
      float y1 = Position.Y;
      float y2 = Position.Y;
      Collision.sloping = false;
      Vector2 vector2_1 = Position;
      Vector2 vector2_2 = Position;
      Vector2 vector2_3 = Velocity;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num5 = Utils.Clamp<int>(num1, 0, max);
      int num6 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num7 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      for (int index1 = num5; index1 < num6; ++index1)
      {
        for (int index2 = num7; index2 < num8; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].active() && !Main.tile[index1, index2].inActive() && (Main.tileSolid[(int) Main.tile[index1, index2].type] || Main.tileSolidTop[(int) Main.tile[index1, index2].type] && Main.tile[index1, index2].frameY == (short) 0))
          {
            Vector2 vector2_4;
            vector2_4.X = (float) (index1 * 16);
            vector2_4.Y = (float) (index2 * 16);
            int num9 = 16;
            if (Main.tile[index1, index2].halfBrick())
            {
              vector2_4.Y += 8f;
              num9 -= 8;
            }
            if ((double) Position.X + (double) Width > (double) vector2_4.X && (double) Position.X < (double) vector2_4.X + 16.0 && (double) Position.Y + (double) Height > (double) vector2_4.Y && (double) Position.Y < (double) vector2_4.Y + (double) num9)
            {
              bool flag1 = true;
              if (TileID.Sets.Platforms[(int) Main.tile[index1, index2].type])
              {
                if ((double) Velocity.Y < 0.0)
                  flag1 = false;
                if ((double) Position.Y + (double) Height < (double) (index2 * 16) || (double) Position.Y + (double) Height - (1.0 + (double) Math.Abs(Velocity.X)) > (double) (index2 * 16 + 16))
                  flag1 = false;
                if ((Main.tile[index1, index2].slope() == (byte) 1 && (double) Velocity.X >= 0.0 || Main.tile[index1, index2].slope() == (byte) 2 && (double) Velocity.X <= 0.0) && ((double) Position.Y + (double) Height) / 16.0 - 1.0 == (double) index2)
                  flag1 = false;
              }
              if (flag1)
              {
                bool flag2 = false;
                if (fall && TileID.Sets.Platforms[(int) Main.tile[index1, index2].type])
                  flag2 = true;
                int index3 = (int) Main.tile[index1, index2].slope();
                vector2_4.X = (float) (index1 * 16);
                vector2_4.Y = (float) (index2 * 16);
                if ((double) Position.X + (double) Width > (double) vector2_4.X && (double) Position.X < (double) vector2_4.X + 16.0 && (double) Position.Y + (double) Height > (double) vector2_4.Y && (double) Position.Y < (double) vector2_4.Y + 16.0)
                {
                  float num10 = 0.0f;
                  if (index3 == 3 || index3 == 4)
                  {
                    if (index3 == 3)
                      num10 = Position.X - vector2_4.X;
                    if (index3 == 4)
                      num10 = (float) ((double) vector2_4.X + 16.0 - ((double) Position.X + (double) Width));
                    if ((double) num10 >= 0.0)
                    {
                      if ((double) Position.Y <= (double) vector2_4.Y + 16.0 - (double) num10)
                      {
                        float num11 = vector2_4.Y + 16f - vector2_1.Y - num10;
                        if ((double) Position.Y + (double) num11 > (double) y2)
                        {
                          vector2_2.Y = Position.Y + num11;
                          y2 = vector2_2.Y;
                          if ((double) vector2_3.Y < 0.0100999996066093)
                            vector2_3.Y = 0.0101f;
                          flagArray[index3] = true;
                        }
                      }
                    }
                    else if ((double) Position.Y > (double) vector2_4.Y)
                    {
                      float num12 = vector2_4.Y + 16f;
                      if ((double) vector2_2.Y < (double) num12)
                      {
                        vector2_2.Y = num12;
                        if ((double) vector2_3.Y < 0.0100999996066093)
                          vector2_3.Y = 0.0101f;
                      }
                    }
                  }
                  if (index3 == 1 || index3 == 2)
                  {
                    if (index3 == 1)
                      num10 = Position.X - vector2_4.X;
                    if (index3 == 2)
                      num10 = (float) ((double) vector2_4.X + 16.0 - ((double) Position.X + (double) Width));
                    if ((double) num10 >= 0.0)
                    {
                      if ((double) Position.Y + (double) Height >= (double) vector2_4.Y + (double) num10)
                      {
                        float num13 = vector2_4.Y - (vector2_1.Y + (float) Height) + num10;
                        if ((double) Position.Y + (double) num13 < (double) y1)
                        {
                          if (flag2)
                          {
                            Collision.stairFall = true;
                          }
                          else
                          {
                            Collision.stair = TileID.Sets.Platforms[(int) Main.tile[index1, index2].type];
                            vector2_2.Y = Position.Y + num13;
                            y1 = vector2_2.Y;
                            if ((double) vector2_3.Y > 0.0)
                              vector2_3.Y = 0.0f;
                            flagArray[index3] = true;
                          }
                        }
                      }
                    }
                    else if (TileID.Sets.Platforms[(int) Main.tile[index1, index2].type] && (double) Position.Y + (double) Height - 4.0 - (double) Math.Abs(Velocity.X) > (double) vector2_4.Y)
                    {
                      if (flag2)
                        Collision.stairFall = true;
                    }
                    else
                    {
                      float num14 = vector2_4.Y - (float) Height;
                      if ((double) vector2_2.Y > (double) num14)
                      {
                        if (flag2)
                        {
                          Collision.stairFall = true;
                        }
                        else
                        {
                          Collision.stair = TileID.Sets.Platforms[(int) Main.tile[index1, index2].type];
                          vector2_2.Y = num14;
                          if ((double) vector2_3.Y > 0.0)
                            vector2_3.Y = 0.0f;
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
      Vector2 Position1 = Position;
      Vector2 vector2_5 = vector2_2 - Position;
      Vector2 Velocity1 = vector2_5;
      int Width1 = Width;
      int Height1 = Height;
      Vector2 vector2_6 = Collision.TileCollision(Position1, Velocity1, Width1, Height1);
      if ((double) vector2_6.Y > (double) vector2_5.Y)
      {
        float num15 = vector2_5.Y - vector2_6.Y;
        vector2_2.Y = Position.Y + vector2_6.Y;
        if (flagArray[1])
          vector2_2.X = Position.X - num15;
        if (flagArray[2])
          vector2_2.X = Position.X + num15;
        vector2_3.X = 0.0f;
        vector2_3.Y = 0.0f;
        Collision.up = false;
      }
      else if ((double) vector2_6.Y < (double) vector2_5.Y)
      {
        float num16 = vector2_6.Y - vector2_5.Y;
        vector2_2.Y = Position.Y + vector2_6.Y;
        if (flagArray[3])
          vector2_2.X = Position.X - num16;
        if (flagArray[4])
          vector2_2.X = Position.X + num16;
        vector2_3.X = 0.0f;
        vector2_3.Y = 0.0f;
      }
      return new Vector4(vector2_2, vector2_3.X, vector2_3.Y);
    }

    public static Vector2 noSlopeCollision(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false)
    {
      Collision.up = false;
      Collision.down = false;
      Vector2 vector2_1 = Velocity;
      Vector2 vector2_2 = Velocity;
      Vector2 vector2_3 = Position + Velocity;
      Vector2 vector2_4 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int num5 = -1;
      int num6 = -1;
      int num7 = -1;
      int num8 = -1;
      int max = Main.maxTilesX - 1;
      int num9 = Utils.Clamp<int>(num1, 0, max);
      int num10 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num11 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num12 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      float num13 = (float) ((num12 + 3) * 16);
      for (int index1 = num9; index1 < num10; ++index1)
      {
        for (int index2 = num11; index2 < num12; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].active() && (Main.tileSolid[(int) Main.tile[index1, index2].type] || Main.tileSolidTop[(int) Main.tile[index1, index2].type] && Main.tile[index1, index2].frameY == (short) 0))
          {
            Vector2 vector2_5;
            vector2_5.X = (float) (index1 * 16);
            vector2_5.Y = (float) (index2 * 16);
            int num14 = 16;
            if (Main.tile[index1, index2].halfBrick())
            {
              vector2_5.Y += 8f;
              num14 -= 8;
            }
            if ((double) vector2_3.X + (double) Width > (double) vector2_5.X && (double) vector2_3.X < (double) vector2_5.X + 16.0 && (double) vector2_3.Y + (double) Height > (double) vector2_5.Y && (double) vector2_3.Y < (double) vector2_5.Y + (double) num14)
            {
              if ((double) vector2_4.Y + (double) Height <= (double) vector2_5.Y)
              {
                Collision.down = true;
                if ((!(Main.tileSolidTop[(int) Main.tile[index1, index2].type] & fallThrough) || !((double) Velocity.Y <= 1.0 | fall2)) && (double) num13 > (double) vector2_5.Y)
                {
                  num7 = index1;
                  num8 = index2;
                  if (num14 < 16)
                    ++num8;
                  if (num7 != num5)
                  {
                    vector2_1.Y = vector2_5.Y - (vector2_4.Y + (float) Height);
                    num13 = vector2_5.Y;
                  }
                }
              }
              else if ((double) vector2_4.X + (double) Width <= (double) vector2_5.X && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                num5 = index1;
                num6 = index2;
                if (num6 != num8)
                  vector2_1.X = vector2_5.X - (vector2_4.X + (float) Width);
                if (num7 == num5)
                  vector2_1.Y = vector2_2.Y;
              }
              else if ((double) vector2_4.X >= (double) vector2_5.X + 16.0 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                num5 = index1;
                num6 = index2;
                if (num6 != num8)
                  vector2_1.X = vector2_5.X + 16f - vector2_4.X;
                if (num7 == num5)
                  vector2_1.Y = vector2_2.Y;
              }
              else if ((double) vector2_4.Y >= (double) vector2_5.Y + (double) num14 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                Collision.up = true;
                num7 = index1;
                num8 = index2;
                vector2_1.Y = (float) ((double) vector2_5.Y + (double) num14 - (double) vector2_4.Y + 0.00999999977648258);
                if (num8 == num6)
                  vector2_1.X = vector2_2.X;
              }
            }
          }
        }
      }
      return vector2_1;
    }

    public static Vector2 TileCollision(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      int gravDir = 1)
    {
      Collision.up = false;
      Collision.down = false;
      Vector2 vector2_1 = Velocity;
      Vector2 vector2_2 = Velocity;
      Vector2 vector2_3 = Position + Velocity;
      Vector2 vector2_4 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int num5 = -1;
      int num6 = -1;
      int num7 = -1;
      int num8 = -1;
      int max = Main.maxTilesX - 1;
      int num9 = Utils.Clamp<int>(num1, 0, max);
      int num10 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num11 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num12 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      float num13 = (float) ((num12 + 3) * 16);
      for (int index1 = num9; index1 < num10; ++index1)
      {
        for (int index2 = num11; index2 < num12; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].active() && !Main.tile[index1, index2].inActive() && (Main.tileSolid[(int) Main.tile[index1, index2].type] || Main.tileSolidTop[(int) Main.tile[index1, index2].type] && Main.tile[index1, index2].frameY == (short) 0))
          {
            Vector2 vector2_5;
            vector2_5.X = (float) (index1 * 16);
            vector2_5.Y = (float) (index2 * 16);
            int num14 = 16;
            if (Main.tile[index1, index2].halfBrick())
            {
              vector2_5.Y += 8f;
              num14 -= 8;
            }
            if ((double) vector2_3.X + (double) Width > (double) vector2_5.X && (double) vector2_3.X < (double) vector2_5.X + 16.0 && (double) vector2_3.Y + (double) Height > (double) vector2_5.Y && (double) vector2_3.Y < (double) vector2_5.Y + (double) num14)
            {
              bool flag1 = false;
              bool flag2 = false;
              if (Main.tile[index1, index2].slope() > (byte) 2)
              {
                if (Main.tile[index1, index2].slope() == (byte) 3 && (double) vector2_4.Y + (double) Math.Abs(Velocity.X) >= (double) vector2_5.Y && (double) vector2_4.X >= (double) vector2_5.X)
                  flag2 = true;
                if (Main.tile[index1, index2].slope() == (byte) 4 && (double) vector2_4.Y + (double) Math.Abs(Velocity.X) >= (double) vector2_5.Y && (double) vector2_4.X + (double) Width <= (double) vector2_5.X + 16.0)
                  flag2 = true;
              }
              else if (Main.tile[index1, index2].slope() > (byte) 0)
              {
                flag1 = true;
                if (Main.tile[index1, index2].slope() == (byte) 1 && (double) vector2_4.Y + (double) Height - (double) Math.Abs(Velocity.X) <= (double) vector2_5.Y + (double) num14 && (double) vector2_4.X >= (double) vector2_5.X)
                  flag2 = true;
                if (Main.tile[index1, index2].slope() == (byte) 2 && (double) vector2_4.Y + (double) Height - (double) Math.Abs(Velocity.X) <= (double) vector2_5.Y + (double) num14 && (double) vector2_4.X + (double) Width <= (double) vector2_5.X + 16.0)
                  flag2 = true;
              }
              if (!flag2)
              {
                if ((double) vector2_4.Y + (double) Height <= (double) vector2_5.Y)
                {
                  Collision.down = true;
                  if ((!(Main.tileSolidTop[(int) Main.tile[index1, index2].type] & fallThrough) || !((double) Velocity.Y <= 1.0 | fall2)) && (double) num13 > (double) vector2_5.Y)
                  {
                    num7 = index1;
                    num8 = index2;
                    if (num14 < 16)
                      ++num8;
                    if (num7 != num5 && !flag1)
                    {
                      vector2_1.Y = (float) ((double) vector2_5.Y - ((double) vector2_4.Y + (double) Height) + (gravDir == -1 ? -0.00999999977648258 : 0.0));
                      num13 = vector2_5.Y;
                    }
                  }
                }
                else if ((double) vector2_4.X + (double) Width <= (double) vector2_5.X && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
                {
                  if (index1 >= 1 && Main.tile[index1 - 1, index2] == null)
                    Main.tile[index1 - 1, index2] = new Tile();
                  if (index1 < 1 || Main.tile[index1 - 1, index2].slope() != (byte) 2 && Main.tile[index1 - 1, index2].slope() != (byte) 4)
                  {
                    num5 = index1;
                    num6 = index2;
                    if (num6 != num8)
                      vector2_1.X = vector2_5.X - (vector2_4.X + (float) Width);
                    if (num7 == num5)
                      vector2_1.Y = vector2_2.Y;
                  }
                }
                else if ((double) vector2_4.X >= (double) vector2_5.X + 16.0 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
                {
                  if (Main.tile[index1 + 1, index2] == null)
                    Main.tile[index1 + 1, index2] = new Tile();
                  if (Main.tile[index1 + 1, index2].slope() != (byte) 1 && Main.tile[index1 + 1, index2].slope() != (byte) 3)
                  {
                    num5 = index1;
                    num6 = index2;
                    if (num6 != num8)
                      vector2_1.X = vector2_5.X + 16f - vector2_4.X;
                    if (num7 == num5)
                      vector2_1.Y = vector2_2.Y;
                  }
                }
                else if ((double) vector2_4.Y >= (double) vector2_5.Y + (double) num14 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
                {
                  Collision.up = true;
                  num7 = index1;
                  num8 = index2;
                  vector2_1.Y = (float) ((double) vector2_5.Y + (double) num14 - (double) vector2_4.Y + (gravDir == 1 ? 0.00999999977648258 : 0.0));
                  if (num8 == num6)
                    vector2_1.X = vector2_2.X;
                }
              }
            }
          }
        }
      }
      return vector2_1;
    }

    public static bool IsClearSpotTest(
      Vector2 position,
      float testMagnitude,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      int gravDir = 1,
      bool checkCardinals = true,
      bool checkSlopes = false)
    {
      if (checkCardinals)
      {
        Vector2 Velocity1 = Vector2.UnitX * testMagnitude;
        if (Collision.TileCollision(position - Velocity1, Velocity1, Width, Height, fallThrough, fall2, gravDir) != Velocity1)
          return false;
        Vector2 Velocity2 = -Vector2.UnitX * testMagnitude;
        if (Collision.TileCollision(position - Velocity2, Velocity2, Width, Height, fallThrough, fall2, gravDir) != Velocity2)
          return false;
        Vector2 Velocity3 = Vector2.UnitY * testMagnitude;
        if (Collision.TileCollision(position - Velocity3, Velocity3, Width, Height, fallThrough, fall2, gravDir) != Velocity3)
          return false;
        Vector2 Velocity4 = -Vector2.UnitY * testMagnitude;
        if (Collision.TileCollision(position - Velocity4, Velocity4, Width, Height, fallThrough, fall2, gravDir) != Velocity4)
          return false;
      }
      if (checkSlopes)
      {
        Vector2 Velocity5 = Vector2.UnitX * testMagnitude;
        Vector4 vector4 = new Vector4(position, testMagnitude, 0.0f);
        if (Collision.SlopeCollision(position, Velocity5, Width, Height, (float) gravDir, fallThrough) != vector4)
          return false;
        Vector2 Velocity6 = -Vector2.UnitX * testMagnitude;
        vector4 = new Vector4(position, -testMagnitude, 0.0f);
        if (Collision.SlopeCollision(position, Velocity6, Width, Height, (float) gravDir, fallThrough) != vector4)
          return false;
        Vector2 Velocity7 = Vector2.UnitY * testMagnitude;
        vector4 = new Vector4(position, 0.0f, testMagnitude);
        if (Collision.SlopeCollision(position, Velocity7, Width, Height, (float) gravDir, fallThrough) != vector4)
          return false;
        Vector2 Velocity8 = -Vector2.UnitY * testMagnitude;
        vector4 = new Vector4(position, 0.0f, -testMagnitude);
        if (Collision.SlopeCollision(position, Velocity8, Width, Height, (float) gravDir, fallThrough) != vector4)
          return false;
      }
      return true;
    }

    public static List<Point> FindCollisionTile(
      int Direction,
      Vector2 position,
      float testMagnitude,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      int gravDir = 1,
      bool checkCardinals = true,
      bool checkSlopes = false)
    {
      List<Point> pointList = new List<Point>();
      Vector2 vector2_1;
      Vector2 vector2_2;
      switch (Direction)
      {
        case 0:
          vector2_1 = Vector2.UnitX * testMagnitude;
          break;
        case 1:
          vector2_1 = -Vector2.UnitX * testMagnitude;
          break;
        case 2:
          vector2_2 = Vector2.UnitY * testMagnitude;
          goto label_19;
        case 3:
          vector2_2 = -Vector2.UnitY * testMagnitude;
          goto label_19;
        default:
label_33:
          return pointList;
      }
      Vector2 Velocity1 = vector2_1;
      Vector4 vec1 = new Vector4(position, Velocity1.X, Velocity1.Y);
      int x = (int) ((double) position.X + (Direction == 0 ? (double) Width : 0.0)) / 16;
      float num1 = Math.Min((float) (16.0 - (double) position.Y % 16.0), (float) Height);
      float num2 = num1;
      if (checkCardinals && Collision.TileCollision(position - Velocity1, Velocity1, Width, (int) num1, fallThrough, fall2, gravDir) != Velocity1)
        pointList.Add(new Point(x, (int) position.Y / 16));
      else if (checkSlopes && Collision.SlopeCollision(position, Velocity1, Width, (int) num1, (float) gravDir, fallThrough).XZW() != vec1.XZW())
        pointList.Add(new Point(x, (int) position.Y / 16));
      for (; (double) num2 + 16.0 <= (double) (Height - 16); num2 += 16f)
      {
        if (checkCardinals && Collision.TileCollision(position - Velocity1 + Vector2.UnitY * num2, Velocity1, Width, 16, fallThrough, fall2, gravDir) != Velocity1)
          pointList.Add(new Point(x, (int) ((double) position.Y + (double) num2) / 16));
        else if (checkSlopes && Collision.SlopeCollision(position + Vector2.UnitY * num2, Velocity1, Width, 16, (float) gravDir, fallThrough).XZW() != vec1.XZW())
          pointList.Add(new Point(x, (int) ((double) position.Y + (double) num2) / 16));
      }
      int Height1 = Height - (int) num2;
      if (checkCardinals && Collision.TileCollision(position - Velocity1 + Vector2.UnitY * num2, Velocity1, Width, Height1, fallThrough, fall2, gravDir) != Velocity1)
      {
        pointList.Add(new Point(x, (int) ((double) position.Y + (double) num2) / 16));
        goto label_33;
      }
      else if (checkSlopes && Collision.SlopeCollision(position + Vector2.UnitY * num2, Velocity1, Width, Height1, (float) gravDir, fallThrough).XZW() != vec1.XZW())
      {
        pointList.Add(new Point(x, (int) ((double) position.Y + (double) num2) / 16));
        goto label_33;
      }
      else
        goto label_33;
label_19:
      Vector2 Velocity2 = vector2_2;
      Vector4 vec2 = new Vector4(position, Velocity2.X, Velocity2.Y);
      int y = (int) ((double) position.Y + (Direction == 2 ? (double) Height : 0.0)) / 16;
      float num3 = Math.Min((float) (16.0 - (double) position.X % 16.0), (float) Width);
      float num4 = num3;
      if (checkCardinals && Collision.TileCollision(position - Velocity2, Velocity2, (int) num3, Height, fallThrough, fall2, gravDir) != Velocity2)
        pointList.Add(new Point((int) position.X / 16, y));
      else if (checkSlopes && Collision.SlopeCollision(position, Velocity2, (int) num3, Height, (float) gravDir, fallThrough).YZW() != vec2.YZW())
        pointList.Add(new Point((int) position.X / 16, y));
      for (; (double) num4 + 16.0 <= (double) (Width - 16); num4 += 16f)
      {
        if (checkCardinals && Collision.TileCollision(position - Velocity2 + Vector2.UnitX * num4, Velocity2, 16, Height, fallThrough, fall2, gravDir) != Velocity2)
          pointList.Add(new Point((int) ((double) position.X + (double) num4) / 16, y));
        else if (checkSlopes && Collision.SlopeCollision(position + Vector2.UnitX * num4, Velocity2, 16, Height, (float) gravDir, fallThrough).YZW() != vec2.YZW())
          pointList.Add(new Point((int) ((double) position.X + (double) num4) / 16, y));
      }
      int Width1 = Width - (int) num4;
      if (checkCardinals && Collision.TileCollision(position - Velocity2 + Vector2.UnitX * num4, Velocity2, Width1, Height, fallThrough, fall2, gravDir) != Velocity2)
      {
        pointList.Add(new Point((int) ((double) position.X + (double) num4) / 16, y));
        goto label_33;
      }
      else if (checkSlopes && Collision.SlopeCollision(position + Vector2.UnitX * num4, Velocity2, Width1, Height, (float) gravDir, fallThrough).YZW() != vec2.YZW())
      {
        pointList.Add(new Point((int) ((double) position.X + (double) num4) / 16, y));
        goto label_33;
      }
      else
        goto label_33;
    }

    public static bool FindCollisionDirection(
      out int Direction,
      Vector2 position,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      int gravDir = 1)
    {
      Vector2 Velocity1 = Vector2.UnitX * 16f;
      if (Collision.TileCollision(position - Velocity1, Velocity1, Width, Height, fallThrough, fall2, gravDir) != Velocity1)
      {
        Direction = 0;
        return true;
      }
      Vector2 Velocity2 = -Vector2.UnitX * 16f;
      if (Collision.TileCollision(position - Velocity2, Velocity2, Width, Height, fallThrough, fall2, gravDir) != Velocity2)
      {
        Direction = 1;
        return true;
      }
      Vector2 Velocity3 = Vector2.UnitY * 16f;
      if (Collision.TileCollision(position - Velocity3, Velocity3, Width, Height, fallThrough, fall2, gravDir) != Velocity3)
      {
        Direction = 2;
        return true;
      }
      Vector2 Velocity4 = -Vector2.UnitY * 16f;
      if (Collision.TileCollision(position - Velocity4, Velocity4, Width, Height, fallThrough, fall2, gravDir) != Velocity4)
      {
        Direction = 3;
        return true;
      }
      Direction = -1;
      return false;
    }

    public static bool SolidCollision(Vector2 Position, int Width, int Height)
    {
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num5 = Utils.Clamp<int>(num1, 0, max);
      int num6 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num7 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      for (int index1 = num5; index1 < num6; ++index1)
      {
        for (int index2 = num7; index2 < num8; ++index2)
        {
          if (Main.tile[index1, index2] != null && !Main.tile[index1, index2].inActive() && Main.tile[index1, index2].active() && Main.tileSolid[(int) Main.tile[index1, index2].type] && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
          {
            Vector2 vector2;
            vector2.X = (float) (index1 * 16);
            vector2.Y = (float) (index2 * 16);
            int num9 = 16;
            if (Main.tile[index1, index2].halfBrick())
            {
              vector2.Y += 8f;
              num9 -= 8;
            }
            if ((double) Position.X + (double) Width > (double) vector2.X && (double) Position.X < (double) vector2.X + 16.0 && (double) Position.Y + (double) Height > (double) vector2.Y && (double) Position.Y < (double) vector2.Y + (double) num9)
              return true;
          }
        }
      }
      return false;
    }

    public static Vector2 WaterCollision(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      bool lavaWalk = true)
    {
      Vector2 vector2_1 = Velocity;
      Vector2 vector2_2 = Position + Velocity;
      Vector2 vector2_3 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int max = Main.maxTilesX - 1;
      int num5 = Utils.Clamp<int>(num1, 0, max);
      int num6 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num7 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num8 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      for (int index1 = num5; index1 < num6; ++index1)
      {
        for (int index2 = num7; index2 < num8; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].liquid > (byte) 0 && Main.tile[index1, index2 - 1].liquid == (byte) 0 && (!Main.tile[index1, index2].lava() || lavaWalk))
          {
            int num9 = (int) Main.tile[index1, index2].liquid / 32 * 2 + 2;
            Vector2 vector2_4;
            vector2_4.X = (float) (index1 * 16);
            vector2_4.Y = (float) (index2 * 16 + 16 - num9);
            if ((double) vector2_2.X + (double) Width > (double) vector2_4.X && (double) vector2_2.X < (double) vector2_4.X + 16.0 && (double) vector2_2.Y + (double) Height > (double) vector2_4.Y && (double) vector2_2.Y < (double) vector2_4.Y + (double) num9 && (double) vector2_3.Y + (double) Height <= (double) vector2_4.Y && !fallThrough)
              vector2_1.Y = vector2_4.Y - (vector2_3.Y + (float) Height);
          }
        }
      }
      return vector2_1;
    }

    public static Vector2 AnyCollision(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool evenActuated = false)
    {
      Vector2 vector2_1 = Velocity;
      Vector2 vector2_2 = Velocity;
      Vector2 vector2_3 = Position + Velocity;
      Vector2 vector2_4 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int num5 = -1;
      int num6 = -1;
      int num7 = -1;
      int num8 = -1;
      if (num1 < 0)
        num1 = 0;
      if (num2 > Main.maxTilesX)
        num2 = Main.maxTilesX;
      if (num3 < 0)
        num3 = 0;
      if (num4 > Main.maxTilesY)
        num4 = Main.maxTilesY;
      for (int index1 = num1; index1 < num2; ++index1)
      {
        for (int index2 = num3; index2 < num4; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].active() && (evenActuated || !Main.tile[index1, index2].inActive()))
          {
            Vector2 vector2_5;
            vector2_5.X = (float) (index1 * 16);
            vector2_5.Y = (float) (index2 * 16);
            int num9 = 16;
            if (Main.tile[index1, index2].halfBrick())
            {
              vector2_5.Y += 8f;
              num9 -= 8;
            }
            if ((double) vector2_3.X + (double) Width > (double) vector2_5.X && (double) vector2_3.X < (double) vector2_5.X + 16.0 && (double) vector2_3.Y + (double) Height > (double) vector2_5.Y && (double) vector2_3.Y < (double) vector2_5.Y + (double) num9)
            {
              if ((double) vector2_4.Y + (double) Height <= (double) vector2_5.Y)
              {
                num7 = index1;
                num8 = index2;
                if (num7 != num5)
                  vector2_1.Y = vector2_5.Y - (vector2_4.Y + (float) Height);
              }
              else if ((double) vector2_4.X + (double) Width <= (double) vector2_5.X && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                num5 = index1;
                num6 = index2;
                if (num6 != num8)
                  vector2_1.X = vector2_5.X - (vector2_4.X + (float) Width);
                if (num7 == num5)
                  vector2_1.Y = vector2_2.Y;
              }
              else if ((double) vector2_4.X >= (double) vector2_5.X + 16.0 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                num5 = index1;
                num6 = index2;
                if (num6 != num8)
                  vector2_1.X = vector2_5.X + 16f - vector2_4.X;
                if (num7 == num5)
                  vector2_1.Y = vector2_2.Y;
              }
              else if ((double) vector2_4.Y >= (double) vector2_5.Y + (double) num9 && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
              {
                num7 = index1;
                num8 = index2;
                vector2_1.Y = (float) ((double) vector2_5.Y + (double) num9 - (double) vector2_4.Y + 0.00999999977648258);
                if (num8 == num6)
                  vector2_1.X = vector2_2.X + 0.01f;
              }
            }
          }
        }
      }
      return vector2_1;
    }

    public static void HitTiles(Vector2 Position, Vector2 Velocity, int Width, int Height)
    {
      Vector2 vector2_1 = Position + Velocity;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      if (num1 < 0)
        num1 = 0;
      if (num2 > Main.maxTilesX)
        num2 = Main.maxTilesX;
      if (num3 < 0)
        num3 = 0;
      if (num4 > Main.maxTilesY)
        num4 = Main.maxTilesY;
      for (int i = num1; i < num2; ++i)
      {
        for (int j = num3; j < num4; ++j)
        {
          if (Main.tile[i, j] != null && !Main.tile[i, j].inActive() && Main.tile[i, j].active() && (Main.tileSolid[(int) Main.tile[i, j].type] || Main.tileSolidTop[(int) Main.tile[i, j].type] && Main.tile[i, j].frameY == (short) 0))
          {
            Vector2 vector2_2;
            vector2_2.X = (float) (i * 16);
            vector2_2.Y = (float) (j * 16);
            int num5 = 16;
            if (Main.tile[i, j].halfBrick())
            {
              vector2_2.Y += 8f;
              num5 -= 8;
            }
            if ((double) vector2_1.X + (double) Width >= (double) vector2_2.X && (double) vector2_1.X <= (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) Height >= (double) vector2_2.Y && (double) vector2_1.Y <= (double) vector2_2.Y + (double) num5)
              WorldGen.KillTile(i, j, true, true);
          }
        }
      }
    }

    public static Vector2 HurtTiles(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool fireImmune = false)
    {
      Vector2 vector2_1 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      if (num1 < 0)
        num1 = 0;
      if (num2 > Main.maxTilesX)
        num2 = Main.maxTilesX;
      if (num3 < 0)
        num3 = 0;
      if (num4 > Main.maxTilesY)
        num4 = Main.maxTilesY;
      for (int i = num1; i < num2; ++i)
      {
        for (int j = num3; j < num4; ++j)
        {
          if (Main.tile[i, j] != null && Main.tile[i, j].slope() == (byte) 0 && !Main.tile[i, j].inActive() && Main.tile[i, j].active() && (Main.tile[i, j].type == (ushort) 32 || Main.tile[i, j].type == (ushort) 37 || Main.tile[i, j].type == (ushort) 48 || Main.tile[i, j].type == (ushort) 232 || Main.tile[i, j].type == (ushort) 53 || Main.tile[i, j].type == (ushort) 57 || Main.tile[i, j].type == (ushort) 58 || Main.tile[i, j].type == (ushort) 69 || Main.tile[i, j].type == (ushort) 76 || Main.tile[i, j].type == (ushort) 112 || Main.tile[i, j].type == (ushort) 116 || Main.tile[i, j].type == (ushort) 123 || Main.tile[i, j].type == (ushort) 224 || Main.tile[i, j].type == (ushort) 234 || Main.tile[i, j].type == (ushort) 352 || Main.tile[i, j].type == (ushort) 484))
          {
            Vector2 vector2_2;
            vector2_2.X = (float) (i * 16);
            vector2_2.Y = (float) (j * 16);
            int num5 = 0;
            int type = (int) Main.tile[i, j].type;
            int num6 = 16;
            if (Main.tile[i, j].halfBrick())
            {
              vector2_2.Y += 8f;
              num6 -= 8;
            }
            if (type == 32 || type == 69 || type == 80 || type == 352 || type == 80 && Main.expertMode)
            {
              if ((double) vector2_1.X + (double) Width > (double) vector2_2.X && (double) vector2_1.X < (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) Height > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + (double) num6 + 11.0 / 1000.0)
              {
                int num7 = 1;
                if ((double) vector2_1.X + (double) (Width / 2) < (double) vector2_2.X + 8.0)
                  num7 = -1;
                int num8 = 10;
                switch (type)
                {
                  case 69:
                    num8 = 17;
                    break;
                  case 80:
                    num8 = 6;
                    break;
                }
                if (type == 32 || type == 69 || type == 352)
                {
                  WorldGen.KillTile(i, j);
                  if (Main.netMode == 1 && !Main.tile[i, j].active() && Main.netMode == 1)
                    NetMessage.SendData(17, number: 4, number2: ((float) i), number3: ((float) j));
                }
                return new Vector2((float) num7, (float) num8);
              }
            }
            else if (type == 53 || type == 112 || type == 116 || type == 123 || type == 224 || type == 234)
            {
              if ((double) vector2_1.X + (double) Width - 2.0 >= (double) vector2_2.X && (double) vector2_1.X + 2.0 <= (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) Height - 2.0 >= (double) vector2_2.Y && (double) vector2_1.Y + 2.0 <= (double) vector2_2.Y + (double) num6)
              {
                int num9 = 1;
                if ((double) vector2_1.X + (double) (Width / 2) < (double) vector2_2.X + 8.0)
                  num9 = -1;
                int num10 = 15;
                return new Vector2((float) num9, (float) num10);
              }
            }
            else if ((double) vector2_1.X + (double) Width >= (double) vector2_2.X && (double) vector2_1.X <= (double) vector2_2.X + 16.0 && (double) vector2_1.Y + (double) Height >= (double) vector2_2.Y && (double) vector2_1.Y <= (double) vector2_2.Y + (double) num6 + 11.0 / 1000.0)
            {
              int num11 = 1;
              if ((double) vector2_1.X + (double) (Width / 2) < (double) vector2_2.X + 8.0)
                num11 = -1;
              if (!fireImmune && (type == 37 || type == 58 || type == 76))
                num5 = 20;
              if (type == 48)
                num5 = 60;
              if (type == 232)
                num5 = 80;
              if (type == 484)
                num5 = 25;
              return new Vector2((float) num11, (float) num5);
            }
          }
        }
      }
      return new Vector2();
    }

    public static bool SwitchTiles(
      Vector2 Position,
      int Width,
      int Height,
      Vector2 oldPosition,
      int objType)
    {
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      if (num1 < 0)
        num1 = 0;
      if (num2 > Main.maxTilesX)
        num2 = Main.maxTilesX;
      if (num3 < 0)
        num3 = 0;
      if (num4 > Main.maxTilesY)
        num4 = Main.maxTilesY;
      for (int index = num1; index < num2; ++index)
      {
        for (int j = num3; j < num4; ++j)
        {
          if (Main.tile[index, j] != null)
          {
            int type = (int) Main.tile[index, j].type;
            if (Main.tile[index, j].active() && (type == 135 || type == 210 || type == 443 || type == 442))
            {
              Vector2 vector2;
              vector2.X = (float) (index * 16);
              vector2.Y = (float) (j * 16 + 12);
              bool flag1 = false;
              if (type == 442)
              {
                if (objType == 4)
                {
                  float r1StartX = 0.0f;
                  float r1StartY = 0.0f;
                  float r1Width = 0.0f;
                  float r1Height = 0.0f;
                  switch ((int) Main.tile[index, j].frameX / 22)
                  {
                    case 0:
                      r1StartX = (float) (index * 16);
                      r1StartY = (float) (j * 16 + 16 - 10);
                      r1Width = 16f;
                      r1Height = 10f;
                      break;
                    case 1:
                      r1StartX = (float) (index * 16);
                      r1StartY = (float) (j * 16);
                      r1Width = 16f;
                      r1Height = 10f;
                      break;
                    case 2:
                      r1StartX = (float) (index * 16);
                      r1StartY = (float) (j * 16);
                      r1Width = 10f;
                      r1Height = 16f;
                      break;
                    case 3:
                      r1StartX = (float) (index * 16 + 16 - 10);
                      r1StartY = (float) (j * 16);
                      r1Width = 10f;
                      r1Height = 16f;
                      break;
                  }
                  if (Utils.FloatIntersect(r1StartX, r1StartY, r1Width, r1Height, Position.X, Position.Y, (float) Width, (float) Height) && !Utils.FloatIntersect(r1StartX, r1StartY, r1Width, r1Height, oldPosition.X, oldPosition.Y, (float) Width, (float) Height))
                  {
                    Wiring.HitSwitch(index, j);
                    NetMessage.SendData(59, number: index, number2: ((float) j));
                    return true;
                  }
                }
                flag1 = true;
              }
              if (!flag1 && (double) Position.X + (double) Width > (double) vector2.X && (double) Position.X < (double) vector2.X + 16.0 && (double) Position.Y + (double) Height > (double) vector2.Y && (double) Position.Y < (double) vector2.Y + 4.01)
              {
                if (type == 210)
                  WorldGen.ExplodeMine(index, j);
                else if ((double) oldPosition.X + (double) Width <= (double) vector2.X || (double) oldPosition.X >= (double) vector2.X + 16.0 || (double) oldPosition.Y + (double) Height <= (double) vector2.Y || (double) oldPosition.Y >= (double) vector2.Y + 16.01)
                {
                  if (type == 443)
                  {
                    if (objType == 1)
                    {
                      Wiring.HitSwitch(index, j);
                      NetMessage.SendData(59, number: index, number2: ((float) j));
                    }
                  }
                  else
                  {
                    int num5 = (int) Main.tile[index, j].frameY / 18;
                    bool flag2 = true;
                    if ((num5 == 4 || num5 == 2 || num5 == 3 || num5 == 6 || num5 == 7) && objType != 1)
                      flag2 = false;
                    if (num5 == 5 && (objType == 1 || objType == 4))
                      flag2 = false;
                    if (flag2)
                    {
                      Wiring.HitSwitch(index, j);
                      NetMessage.SendData(59, number: index, number2: ((float) j));
                      if (num5 == 7)
                      {
                        WorldGen.KillTile(index, j);
                        if (Main.netMode == 1)
                          NetMessage.SendData(17, number2: ((float) index), number3: ((float) j));
                      }
                      return true;
                    }
                  }
                }
              }
            }
          }
        }
      }
      return false;
    }

    public bool SwitchTilesNew(
      Vector2 Position,
      int Width,
      int Height,
      Vector2 oldPosition,
      int objType)
    {
      Point tileCoordinates1 = Position.ToTileCoordinates();
      Point tileCoordinates2 = (Position + new Vector2((float) Width, (float) Height)).ToTileCoordinates();
      int num1 = Utils.Clamp<int>(tileCoordinates1.X, 0, Main.maxTilesX - 1);
      int num2 = Utils.Clamp<int>(tileCoordinates1.Y, 0, Main.maxTilesY - 1);
      int num3 = Utils.Clamp<int>(tileCoordinates2.X, 0, Main.maxTilesX - 1);
      int num4 = Utils.Clamp<int>(tileCoordinates2.Y, 0, Main.maxTilesY - 1);
      for (int index1 = num1; index1 <= num3; ++index1)
      {
        for (int index2 = num2; index2 <= num4; ++index2)
        {
          if (Main.tile[index1, index2] != null)
          {
            int type = (int) Main.tile[index1, index2].type;
          }
        }
      }
      return false;
    }

    public static Vector2 StickyTiles(
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height)
    {
      Vector2 vector2_1 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      if (num1 < 0)
        num1 = 0;
      if (num2 > Main.maxTilesX)
        num2 = Main.maxTilesX;
      if (num3 < 0)
        num3 = 0;
      if (num4 > Main.maxTilesY)
        num4 = Main.maxTilesY;
      Vector2 vector2_2;
      for (int index1 = num1; index1 < num2; ++index1)
      {
        for (int index2 = num3; index2 < num4; ++index2)
        {
          if (Main.tile[index1, index2] != null && Main.tile[index1, index2].active() && !Main.tile[index1, index2].inActive())
          {
            if (Main.tile[index1, index2].type == (ushort) 51)
            {
              int num5 = 0;
              vector2_2.X = (float) (index1 * 16);
              vector2_2.Y = (float) (index2 * 16);
              if ((double) vector2_1.X + (double) Width > (double) vector2_2.X - (double) num5 && (double) vector2_1.X < (double) vector2_2.X + 16.0 + (double) num5 && (double) vector2_1.Y + (double) Height > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + 16.01)
              {
                if (Main.tile[index1, index2].type == (ushort) 51 && (double) Math.Abs(Velocity.X) + (double) Math.Abs(Velocity.Y) > 0.7 && Main.rand.Next(30) == 0)
                  Dust.NewDust(new Vector2((float) (index1 * 16), (float) (index2 * 16)), 16, 16, 30);
                return new Vector2((float) index1, (float) index2);
              }
            }
            else if (Main.tile[index1, index2].type == (ushort) 229 && Main.tile[index1, index2].slope() == (byte) 0)
            {
              int num6 = 1;
              vector2_2.X = (float) (index1 * 16);
              vector2_2.Y = (float) (index2 * 16);
              float num7 = 16.01f;
              if (Main.tile[index1, index2].halfBrick())
              {
                vector2_2.Y += 8f;
                num7 -= 8f;
              }
              if ((double) vector2_1.X + (double) Width > (double) vector2_2.X - (double) num6 && (double) vector2_1.X < (double) vector2_2.X + 16.0 + (double) num6 && (double) vector2_1.Y + (double) Height > (double) vector2_2.Y && (double) vector2_1.Y < (double) vector2_2.Y + (double) num7)
              {
                if (Main.tile[index1, index2].type == (ushort) 51 && (double) Math.Abs(Velocity.X) + (double) Math.Abs(Velocity.Y) > 0.7 && Main.rand.Next(30) == 0)
                  Dust.NewDust(new Vector2((float) (index1 * 16), (float) (index2 * 16)), 16, 16, 30);
                return new Vector2((float) index1, (float) index2);
              }
            }
          }
        }
      }
      return new Vector2(-1f, -1f);
    }

    public static bool SolidTilesVersatile(int startX, int endX, int startY, int endY)
    {
      if (startX > endX)
        Utils.Swap<int>(ref startX, ref endX);
      if (startY > endY)
        Utils.Swap<int>(ref startY, ref endY);
      return Collision.SolidTiles(startX, endX, startY, endY);
    }

    public static bool SolidTiles(Vector2 position, int width, int height) => Collision.SolidTiles((int) ((double) position.X / 16.0), (int) (((double) position.X + (double) width) / 16.0), (int) ((double) position.Y / 16.0), (int) (((double) position.Y + (double) height) / 16.0));

    public static bool SolidTiles(int startX, int endX, int startY, int endY)
    {
      if (startX < 0 || endX >= Main.maxTilesX || startY < 0 || endY >= Main.maxTilesY)
        return true;
      for (int index1 = startX; index1 < endX + 1; ++index1)
      {
        for (int index2 = startY; index2 < endY + 1; ++index2)
        {
          if (Main.tile[index1, index2] == null)
            return false;
          if (Main.tile[index1, index2].active() && !Main.tile[index1, index2].inActive() && Main.tileSolid[(int) Main.tile[index1, index2].type] && !Main.tileSolidTop[(int) Main.tile[index1, index2].type])
            return true;
        }
      }
      return false;
    }

    public static void StepDown(
      ref Vector2 position,
      ref Vector2 velocity,
      int width,
      int height,
      ref float stepSpeed,
      ref float gfxOffY,
      int gravDir = 1,
      bool waterWalk = false)
    {
      Vector2 vector2 = position;
      vector2.X += velocity.X;
      vector2.Y = (float) Math.Floor(((double) vector2.Y + (double) height) / 16.0) * 16f - (float) height;
      bool flag = false;
      int num1 = (int) ((double) vector2.X / 16.0);
      int num2 = (int) (((double) vector2.X + (double) width) / 16.0);
      int num3 = (int) (((double) vector2.Y + (double) height + 4.0) / 16.0);
      int num4 = height / 16 + (height % 16 == 0 ? 0 : 1);
      float num5 = (float) ((num3 + num4) * 16);
      float num6 = (float) ((double) Main.bottomWorld / 16.0 - 42.0);
      for (int x = num1; x <= num2; ++x)
      {
        for (int y = num3; y <= num3 + 1; ++y)
        {
          if (WorldGen.InWorld(x, y, 1))
          {
            if (Main.tile[x, y] == null)
              Main.tile[x, y] = new Tile();
            if (Main.tile[x, y - 1] == null)
              Main.tile[x, y - 1] = new Tile();
            if (waterWalk && Main.tile[x, y].liquid > (byte) 0 && Main.tile[x, y - 1].liquid == (byte) 0)
            {
              int num7 = (int) Main.tile[x, y].liquid / 32 * 2 + 2;
              int num8 = y * 16 + 16 - num7;
              if (new Rectangle(x * 16, y * 16 - 17, 16, 16).Intersects(new Rectangle((int) position.X, (int) position.Y, width, height)) && (double) num8 < (double) num5)
                num5 = (float) num8;
            }
            if ((double) y >= (double) num6 || Main.tile[x, y].nactive() && (Main.tileSolid[(int) Main.tile[x, y].type] || Main.tileSolidTop[(int) Main.tile[x, y].type]))
            {
              int num9 = y * 16;
              if (Main.tile[x, y].halfBrick())
                num9 += 8;
              if (Utils.FloatIntersect((float) (x * 16), (float) (y * 16 - 17), 16f, 16f, position.X, position.Y, (float) width, (float) height) && (double) num9 < (double) num5)
                num5 = (float) num9;
            }
          }
        }
      }
      float num10 = num5 - (position.Y + (float) height);
      if ((double) num10 <= 7.0 || (double) num10 >= 17.0 || flag)
        return;
      stepSpeed = 1.5f;
      if ((double) num10 > 9.0)
        stepSpeed = 2.5f;
      gfxOffY += position.Y + (float) height - num5;
      position.Y = num5 - (float) height;
    }

    public static void StepUp(
      ref Vector2 position,
      ref Vector2 velocity,
      int width,
      int height,
      ref float stepSpeed,
      ref float gfxOffY,
      int gravDir = 1,
      bool holdsMatching = false,
      int specialChecksMode = 0)
    {
      int num1 = 0;
      if ((double) velocity.X < 0.0)
        num1 = -1;
      if ((double) velocity.X > 0.0)
        num1 = 1;
      Vector2 vector2 = position;
      vector2.X += velocity.X;
      int x = (int) (((double) vector2.X + (double) (width / 2) + (double) ((width / 2 + 1) * num1)) / 16.0);
      int index1 = (int) (((double) vector2.Y + 0.1) / 16.0);
      if (gravDir == 1)
        index1 = (int) (((double) vector2.Y + (double) height - 1.0) / 16.0);
      int num2 = height / 16 + (height % 16 == 0 ? 0 : 1);
      bool flag1 = true;
      bool flag2 = true;
      if (Main.tile[x, index1] == null)
        return;
      for (int index2 = 1; index2 < num2 + 2; ++index2)
      {
        if (!WorldGen.InWorld(x, index1 - index2 * gravDir) || Main.tile[x, index1 - index2 * gravDir] == null)
          return;
      }
      if (!WorldGen.InWorld(x - num1, index1 - num2 * gravDir) || Main.tile[x - num1, index1 - num2 * gravDir] == null)
        return;
      for (int index3 = 2; index3 < num2 + 1; ++index3)
      {
        if (!WorldGen.InWorld(x, index1 - index3 * gravDir) || Main.tile[x, index1 - index3 * gravDir] == null)
          return;
        Tile tile = Main.tile[x, index1 - index3 * gravDir];
        flag1 = flag1 && (!tile.nactive() || !Main.tileSolid[(int) tile.type] || Main.tileSolidTop[(int) tile.type]);
      }
      Tile tile1 = Main.tile[x - num1, index1 - num2 * gravDir];
      bool flag3 = flag2 && (!tile1.nactive() || !Main.tileSolid[(int) tile1.type] || Main.tileSolidTop[(int) tile1.type]);
      bool flag4 = true;
      bool flag5 = true;
      bool flag6 = true;
      bool flag7;
      Tile tile2;
      bool flag8;
      if (gravDir == 1)
      {
        if (Main.tile[x, index1 - gravDir] == null || Main.tile[x, index1 - (num2 + 1) * gravDir] == null)
          return;
        Tile tile3 = Main.tile[x, index1 - gravDir];
        Tile tile4 = Main.tile[x, index1 - (num2 + 1) * gravDir];
        flag7 = flag4 && (!tile3.nactive() || !Main.tileSolid[(int) tile3.type] || Main.tileSolidTop[(int) tile3.type] || tile3.slope() == (byte) 1 && (double) position.X + (double) (width / 2) > (double) (x * 16) || tile3.slope() == (byte) 2 && (double) position.X + (double) (width / 2) < (double) (x * 16 + 16) || tile3.halfBrick() && (!tile4.nactive() || !Main.tileSolid[(int) tile4.type] || Main.tileSolidTop[(int) tile4.type]));
        Tile tile5 = Main.tile[x, index1];
        tile2 = Main.tile[x, index1 - 1];
        if (specialChecksMode == 1)
          flag6 = tile5.type != (ushort) 16 && tile5.type != (ushort) 18 && tile5.type != (ushort) 14 && tile5.type != (ushort) 469 && tile5.type != (ushort) 134;
        flag8 = ((!flag5 ? (false ? 1 : 0) : (!tile5.nactive() || tile5.topSlope() && (tile5.slope() != (byte) 1 || (double) position.X + (double) (width / 2) >= (double) (x * 16)) && (tile5.slope() != (byte) 2 || (double) position.X + (double) (width / 2) <= (double) (x * 16 + 16)) || tile5.topSlope() && (double) position.Y + (double) height <= (double) (index1 * 16) || (!Main.tileSolid[(int) tile5.type] || Main.tileSolidTop[(int) tile5.type]) && ((!holdsMatching || (!Main.tileSolidTop[(int) tile5.type] || tile5.frameY != (short) 0) && !TileID.Sets.Platforms[(int) tile5.type] ? 0 : (!Main.tileSolid[(int) tile2.type] ? 1 : (!tile2.nactive() ? 1 : 0))) & (flag6 ? 1 : 0)) == 0 ? (!tile2.halfBrick() ? (false ? 1 : 0) : (tile2.nactive() ? 1 : 0)) : (true ? 1 : 0))) & (!Main.tileSolidTop[(int) tile5.type] ? 1 : (!Main.tileSolidTop[(int) tile2.type] ? 1 : 0))) != 0;
      }
      else
      {
        Tile tile6 = Main.tile[x, index1 - gravDir];
        Tile tile7 = Main.tile[x, index1 - (num2 + 1) * gravDir];
        flag7 = flag4 && (!tile6.nactive() || !Main.tileSolid[(int) tile6.type] || Main.tileSolidTop[(int) tile6.type] || tile6.slope() != (byte) 0 || tile6.halfBrick() && (!tile7.nactive() || !Main.tileSolid[(int) tile7.type] || Main.tileSolidTop[(int) tile7.type]));
        Tile tile8 = Main.tile[x, index1];
        tile2 = Main.tile[x, index1 + 1];
        flag8 = flag5 && (tile8.nactive() && (Main.tileSolid[(int) tile8.type] && !Main.tileSolidTop[(int) tile8.type] || holdsMatching && Main.tileSolidTop[(int) tile8.type] && tile8.frameY == (short) 0 && (!Main.tileSolid[(int) tile2.type] || !tile2.nactive())) || tile2.halfBrick() && tile2.nactive());
      }
      if ((double) (x * 16) >= (double) vector2.X + (double) width || (double) (x * 16 + 16) <= (double) vector2.X)
        return;
      if (gravDir == 1)
      {
        if (!(flag8 & flag7 & flag1 & flag3))
          return;
        float num3 = (float) (index1 * 16);
        if (Main.tile[x, index1 - 1].halfBrick())
          num3 -= 8f;
        else if (Main.tile[x, index1].halfBrick())
          num3 += 8f;
        if ((double) num3 >= (double) vector2.Y + (double) height)
          return;
        float num4 = vector2.Y + (float) height - num3;
        if ((double) num4 > 16.1)
          return;
        gfxOffY += position.Y + (float) height - num3;
        position.Y = num3 - (float) height;
        if ((double) num4 < 9.0)
          stepSpeed = 1f;
        else
          stepSpeed = 2f;
      }
      else
      {
        if (!(flag8 & flag7 & flag1 & flag3) || Main.tile[x, index1].bottomSlope() || TileID.Sets.Platforms[(int) tile2.type])
          return;
        float num5 = (float) (index1 * 16 + 16);
        if ((double) num5 <= (double) vector2.Y)
          return;
        float num6 = num5 - vector2.Y;
        if ((double) num6 > 16.1)
          return;
        gfxOffY -= num5 - position.Y;
        position.Y = num5;
        velocity.Y = 0.0f;
        if ((double) num6 < 9.0)
          stepSpeed = 1f;
        else
          stepSpeed = 2f;
      }
    }

    public static bool InTileBounds(int x, int y, int lx, int ly, int hx, int hy) => x >= lx && x <= hx && y >= ly && y <= hy;

    public static float GetTileRotation(Vector2 position)
    {
      float num1 = position.Y % 16f;
      int index1 = (int) ((double) position.X / 16.0);
      int index2 = (int) ((double) position.Y / 16.0);
      Tile tile = Main.tile[index1, index2];
      bool flag = false;
      for (int index3 = 2; index3 >= 0; --index3)
      {
        if (tile.active())
        {
          if (Main.tileSolid[(int) tile.type])
          {
            int num2 = tile.blockType();
            if (tile.type == (ushort) 19)
            {
              int num3 = (int) tile.frameX / 18;
              if ((num3 >= 0 && num3 <= 7 || num3 >= 12 && num3 <= 16) && (double) num1 == 0.0 | flag)
                return 0.0f;
              switch (num3)
              {
                case 8:
                case 19:
                case 21:
                case 23:
                  return -0.7853982f;
                case 10:
                case 20:
                case 22:
                case 24:
                  return 0.7853982f;
                case 25:
                case 26:
                  if (flag)
                    return 0.0f;
                  if (num2 == 2)
                    return 0.7853982f;
                  if (num2 == 3)
                    return -0.7853982f;
                  break;
              }
            }
            else
            {
              if (num2 == 1)
                return 0.0f;
              if (num2 == 2)
                return 0.7853982f;
              return num2 == 3 ? -0.7853982f : 0.0f;
            }
          }
          else if (((!Main.tileSolidTop[(int) tile.type] ? 0 : (tile.frameY == (short) 0 ? 1 : 0)) & (flag ? 1 : 0)) != 0)
            return 0.0f;
        }
        ++index2;
        tile = Main.tile[index1, index2];
        flag = true;
      }
      return 0.0f;
    }

    public static List<Point> GetEntityEdgeTiles(
      Entity entity,
      bool left = true,
      bool right = true,
      bool up = true,
      bool down = true)
    {
      int x1 = (int) entity.position.X;
      int y1 = (int) entity.position.Y;
      int num1 = x1 % 16;
      int num2 = y1 % 16;
      int x2 = (int) entity.Right.X;
      int y2 = (int) entity.Bottom.Y;
      if (x1 % 16 == 0)
        --x1;
      if (y1 % 16 == 0)
        --y1;
      if (x2 % 16 == 0)
        ++x2;
      if (y2 % 16 == 0)
        ++y2;
      int num3 = x2 / 16 - x1 / 16;
      int num4 = y2 / 16 - y1 / 16;
      List<Point> pointList = new List<Point>();
      int x3 = x1 / 16;
      int y3 = y1 / 16;
      for (int x4 = x3; x4 <= x3 + num3; ++x4)
      {
        if (up)
          pointList.Add(new Point(x4, y3));
        if (down)
          pointList.Add(new Point(x4, y3 + num4));
      }
      for (int y4 = y3; y4 < y3 + num4; ++y4)
      {
        if (left)
          pointList.Add(new Point(x3, y4));
        if (right)
          pointList.Add(new Point(x3 + num3, y4));
      }
      return pointList;
    }

    public static void StepConveyorBelt(Entity entity, float gravDir)
    {
      Player player = (Player) null;
      if (entity is Player)
      {
        player = (Player) entity;
        if ((double) Math.Abs(player.gfxOffY) > 2.0 || player.grapCount > 0 || player.pulley)
          return;
        entity.height -= 5;
        entity.position.Y += 5f;
      }
      int num1 = 0;
      int num2 = 0;
      bool flag = false;
      int num3 = (int) entity.position.Y + entity.height;
      entity.Hitbox.Inflate(2, 2);
      Vector2 topLeft = entity.TopLeft;
      Vector2 topRight = entity.TopRight;
      Vector2 bottomLeft = entity.BottomLeft;
      Vector2 bottomRight = entity.BottomRight;
      List<Point> entityEdgeTiles = Collision.GetEntityEdgeTiles(entity, false, false);
      Vector2 vector2_1 = new Vector2(0.0001f);
      foreach (Point point in entityEdgeTiles)
      {
        if (WorldGen.InWorld(point.X, point.Y) && (player == null || !player.onTrack || point.Y >= num3))
        {
          Tile tile = Main.tile[point.X, point.Y];
          if (tile != null && tile.active() && tile.nactive())
          {
            int num4 = TileID.Sets.ConveyorDirection[(int) tile.type];
            if (num4 != 0)
            {
              Vector2 lineStart1;
              Vector2 lineStart2;
              lineStart1.X = lineStart2.X = (float) (point.X * 16);
              Vector2 lineEnd1;
              Vector2 lineEnd2;
              lineEnd1.X = lineEnd2.X = (float) (point.X * 16 + 16);
              switch (tile.slope())
              {
                case 1:
                  lineStart2.Y = (float) (point.Y * 16);
                  lineEnd2.Y = lineEnd1.Y = lineStart1.Y = (float) (point.Y * 16 + 16);
                  break;
                case 2:
                  lineEnd2.Y = (float) (point.Y * 16);
                  lineStart2.Y = lineEnd1.Y = lineStart1.Y = (float) (point.Y * 16 + 16);
                  break;
                case 3:
                  lineEnd1.Y = lineStart2.Y = lineEnd2.Y = (float) (point.Y * 16);
                  lineStart1.Y = (float) (point.Y * 16 + 16);
                  break;
                case 4:
                  lineStart1.Y = lineStart2.Y = lineEnd2.Y = (float) (point.Y * 16);
                  lineEnd1.Y = (float) (point.Y * 16 + 16);
                  break;
                default:
                  lineStart2.Y = !tile.halfBrick() ? (lineEnd2.Y = (float) (point.Y * 16)) : (lineEnd2.Y = (float) (point.Y * 16 + 8));
                  lineStart1.Y = lineEnd1.Y = (float) (point.Y * 16 + 16);
                  break;
              }
              int num5 = 0;
              if (!TileID.Sets.Platforms[(int) tile.type] && Collision.CheckAABBvLineCollision2(entity.position - vector2_1, entity.Size + vector2_1 * 2f, lineStart1, lineEnd1))
                --num5;
              if (Collision.CheckAABBvLineCollision2(entity.position - vector2_1, entity.Size + vector2_1 * 2f, lineStart2, lineEnd2))
                ++num5;
              if (num5 != 0)
              {
                flag = true;
                num1 += num4 * num5 * (int) gravDir;
                if (tile.leftSlope())
                  num2 += (int) gravDir * -num4;
                if (tile.rightSlope())
                  num2 -= (int) gravDir * -num4;
              }
            }
          }
        }
      }
      if (entity is Player)
      {
        entity.height += 5;
        entity.position.Y -= 5f;
      }
      if (!flag || num1 == 0)
        return;
      int num6 = Math.Sign(num1);
      int num7 = Math.Sign(num2);
      Vector2 Velocity = Vector2.Normalize(new Vector2((float) num6 * gravDir, (float) num7)) * 2.5f;
      Vector2 vector2_2 = Collision.TileCollision(entity.position, Velocity, entity.width, entity.height, gravDir: ((int) gravDir));
      entity.position += vector2_2;
      Velocity = new Vector2(0.0f, 2.5f * gravDir);
      Vector2 vector2_3 = Collision.TileCollision(entity.position, Velocity, entity.width, entity.height, gravDir: ((int) gravDir));
      entity.position += vector2_3;
    }

    public static List<Point> GetTilesIn(Vector2 TopLeft, Vector2 BottomRight)
    {
      List<Point> pointList = new List<Point>();
      Point tileCoordinates1 = TopLeft.ToTileCoordinates();
      Point tileCoordinates2 = BottomRight.ToTileCoordinates();
      int num1 = Utils.Clamp<int>(tileCoordinates1.X, 0, Main.maxTilesX - 1);
      int num2 = Utils.Clamp<int>(tileCoordinates1.Y, 0, Main.maxTilesY - 1);
      int num3 = Utils.Clamp<int>(tileCoordinates2.X, 0, Main.maxTilesX - 1);
      int num4 = Utils.Clamp<int>(tileCoordinates2.Y, 0, Main.maxTilesY - 1);
      for (int x = num1; x <= num3; ++x)
      {
        for (int y = num2; y <= num4; ++y)
        {
          if (Main.tile[x, y] != null)
            pointList.Add(new Point(x, y));
        }
      }
      return pointList;
    }

    public static void ExpandVertically(
      int startX,
      int startY,
      out int topY,
      out int bottomY,
      int maxExpandUp = 100,
      int maxExpandDown = 100)
    {
      topY = startY;
      bottomY = startY;
      if (!WorldGen.InWorld(startX, startY, 10))
        return;
      for (int index = 0; index < maxExpandUp && topY > 0 && topY >= 10 && Main.tile[startX, topY] != null && !WorldGen.SolidTile3(startX, topY); ++index)
        --topY;
      for (int index = 0; index < maxExpandDown && bottomY < Main.maxTilesY - 10 && bottomY <= Main.maxTilesY - 10 && Main.tile[startX, bottomY] != null && !WorldGen.SolidTile3(startX, bottomY); ++index)
        ++bottomY;
    }

    public static Vector2 AdvancedTileCollision(
      bool[] forcedIgnoredTiles,
      Vector2 Position,
      Vector2 Velocity,
      int Width,
      int Height,
      bool fallThrough = false,
      bool fall2 = false,
      int gravDir = 1)
    {
      Collision.up = false;
      Collision.down = false;
      Vector2 vector2_1 = Velocity;
      Vector2 vector2_2 = Velocity;
      Vector2 vector2_3 = Position + Velocity;
      Vector2 vector2_4 = Position;
      int num1 = (int) ((double) Position.X / 16.0) - 1;
      int num2 = (int) (((double) Position.X + (double) Width) / 16.0) + 2;
      int num3 = (int) ((double) Position.Y / 16.0) - 1;
      int num4 = (int) (((double) Position.Y + (double) Height) / 16.0) + 2;
      int num5 = -1;
      int num6 = -1;
      int num7 = -1;
      int num8 = -1;
      int max = Main.maxTilesX - 1;
      int num9 = Utils.Clamp<int>(num1, 0, max);
      int num10 = Utils.Clamp<int>(num2, 0, Main.maxTilesX - 1);
      int num11 = Utils.Clamp<int>(num3, 0, Main.maxTilesY - 1);
      int num12 = Utils.Clamp<int>(num4, 0, Main.maxTilesY - 1);
      float num13 = (float) ((num12 + 3) * 16);
      for (int index1 = num9; index1 < num10; ++index1)
      {
        for (int index2 = num11; index2 < num12; ++index2)
        {
          Tile tile = Main.tile[index1, index2];
          if (tile != null && tile.active() && !tile.inActive() && !forcedIgnoredTiles[(int) tile.type] && (Main.tileSolid[(int) tile.type] || Main.tileSolidTop[(int) tile.type] && tile.frameY == (short) 0))
          {
            Vector2 vector2_5;
            vector2_5.X = (float) (index1 * 16);
            vector2_5.Y = (float) (index2 * 16);
            int num14 = 16;
            if (tile.halfBrick())
            {
              vector2_5.Y += 8f;
              num14 -= 8;
            }
            if ((double) vector2_3.X + (double) Width > (double) vector2_5.X && (double) vector2_3.X < (double) vector2_5.X + 16.0 && (double) vector2_3.Y + (double) Height > (double) vector2_5.Y && (double) vector2_3.Y < (double) vector2_5.Y + (double) num14)
            {
              bool flag1 = false;
              bool flag2 = false;
              if (tile.slope() > (byte) 2)
              {
                if (tile.slope() == (byte) 3 && (double) vector2_4.Y + (double) Math.Abs(Velocity.X) >= (double) vector2_5.Y && (double) vector2_4.X >= (double) vector2_5.X)
                  flag2 = true;
                if (tile.slope() == (byte) 4 && (double) vector2_4.Y + (double) Math.Abs(Velocity.X) >= (double) vector2_5.Y && (double) vector2_4.X + (double) Width <= (double) vector2_5.X + 16.0)
                  flag2 = true;
              }
              else if (tile.slope() > (byte) 0)
              {
                flag1 = true;
                if (tile.slope() == (byte) 1 && (double) vector2_4.Y + (double) Height - (double) Math.Abs(Velocity.X) <= (double) vector2_5.Y + (double) num14 && (double) vector2_4.X >= (double) vector2_5.X)
                  flag2 = true;
                if (tile.slope() == (byte) 2 && (double) vector2_4.Y + (double) Height - (double) Math.Abs(Velocity.X) <= (double) vector2_5.Y + (double) num14 && (double) vector2_4.X + (double) Width <= (double) vector2_5.X + 16.0)
                  flag2 = true;
              }
              if (!flag2)
              {
                if ((double) vector2_4.Y + (double) Height <= (double) vector2_5.Y)
                {
                  Collision.down = true;
                  if ((!(Main.tileSolidTop[(int) tile.type] & fallThrough) || !((double) Velocity.Y <= 1.0 | fall2)) && (double) num13 > (double) vector2_5.Y)
                  {
                    num7 = index1;
                    num8 = index2;
                    if (num14 < 16)
                      ++num8;
                    if (num7 != num5 && !flag1)
                    {
                      vector2_1.Y = (float) ((double) vector2_5.Y - ((double) vector2_4.Y + (double) Height) + (gravDir == -1 ? -0.00999999977648258 : 0.0));
                      num13 = vector2_5.Y;
                    }
                  }
                }
                else if ((double) vector2_4.X + (double) Width <= (double) vector2_5.X && !Main.tileSolidTop[(int) tile.type])
                {
                  if (Main.tile[index1 - 1, index2] == null)
                    Main.tile[index1 - 1, index2] = new Tile();
                  if (Main.tile[index1 - 1, index2].slope() != (byte) 2 && Main.tile[index1 - 1, index2].slope() != (byte) 4)
                  {
                    num5 = index1;
                    num6 = index2;
                    if (num6 != num8)
                      vector2_1.X = vector2_5.X - (vector2_4.X + (float) Width);
                    if (num7 == num5)
                      vector2_1.Y = vector2_2.Y;
                  }
                }
                else if ((double) vector2_4.X >= (double) vector2_5.X + 16.0 && !Main.tileSolidTop[(int) tile.type])
                {
                  if (Main.tile[index1 + 1, index2] == null)
                    Main.tile[index1 + 1, index2] = new Tile();
                  if (Main.tile[index1 + 1, index2].slope() != (byte) 1 && Main.tile[index1 + 1, index2].slope() != (byte) 3)
                  {
                    num5 = index1;
                    num6 = index2;
                    if (num6 != num8)
                      vector2_1.X = vector2_5.X + 16f - vector2_4.X;
                    if (num7 == num5)
                      vector2_1.Y = vector2_2.Y;
                  }
                }
                else if ((double) vector2_4.Y >= (double) vector2_5.Y + (double) num14 && !Main.tileSolidTop[(int) tile.type])
                {
                  Collision.up = true;
                  num7 = index1;
                  num8 = index2;
                  vector2_1.Y = (float) ((double) vector2_5.Y + (double) num14 - (double) vector2_4.Y + (gravDir == 1 ? 0.00999999977648258 : 0.0));
                  if (num8 == num6)
                    vector2_1.X = vector2_2.X;
                }
              }
            }
          }
        }
      }
      return vector2_1;
    }

    public static void LaserScan(
      Vector2 samplingPoint,
      Vector2 directionUnit,
      float samplingWidth,
      float maxDistance,
      float[] samples)
    {
      for (int index = 0; index < samples.Length; ++index)
      {
        float num1 = (float) index / (float) (samples.Length - 1);
        Vector2 vector2_1 = samplingPoint;
        Vector2 spinningpoint = directionUnit;
        Vector2 vector2_2 = new Vector2();
        Vector2 center = vector2_2;
        Vector2 vector2_3 = spinningpoint.RotatedBy(1.57079637050629, center) * (num1 - 0.5f) * samplingWidth;
        Vector2 vector2_4 = vector2_1 + vector2_3;
        int x1 = (int) vector2_4.X / 16;
        int y1 = (int) vector2_4.Y / 16;
        Vector2 vector2_5 = vector2_4 + directionUnit * maxDistance;
        int x2 = (int) vector2_5.X / 16;
        int y2 = (int) vector2_5.Y / 16;
        Tuple<int, int> col;
        float num2;
        if (!Collision.TupleHitLine(x1, y1, x2, y2, 0, 0, new List<Tuple<int, int>>(), out col))
        {
          vector2_2 = new Vector2((float) Math.Abs(x1 - col.Item1), (float) Math.Abs(y1 - col.Item2));
          num2 = vector2_2.Length() * 16f;
        }
        else if (col.Item1 == x2 && col.Item2 == y2)
        {
          num2 = maxDistance;
        }
        else
        {
          vector2_2 = new Vector2((float) Math.Abs(x1 - col.Item1), (float) Math.Abs(y1 - col.Item2));
          num2 = vector2_2.Length() * 16f;
        }
        samples[index] = num2;
      }
    }

    public static void AimingLaserScan(
      Vector2 startPoint,
      Vector2 endPoint,
      float samplingWidth,
      int samplesToTake,
      out Vector2 vectorTowardsTarget,
      out float[] samples)
    {
      samples = new float[samplesToTake];
      vectorTowardsTarget = endPoint - startPoint;
      Collision.LaserScan(startPoint, vectorTowardsTarget.SafeNormalize(Vector2.Zero), samplingWidth, vectorTowardsTarget.Length(), samples);
    }
  }
}