XNA 2D平台世界碰撞

Question

我在我正在制作的平台游戏中遇到了我的世界碰撞问题。我知道为什么（或者我认为我知道）问题会出现。我的程序似乎进入了第一个“if”，当时它也没有。有些东西是错的（我想），但我找不到。

其次，我想知道我的解决方案是否是一个好主意，或者是否应该采取其他措施。如果是这样的错误？我是编程的初学者，所以请温柔地对待我; D

    protected void CheckWorldCollison()
    {
        float collisionWidth = this.width + (Tile.GetTileSize() * 2);
        float collisionHeight = this.height + (Tile.GetTileSize() * 2);

        for (int x = -1; x < (collisionWidth / Tile.GetTileSize()) - 1; x++)
        {
            for (int y = -1; y < (collisionHeight / Tile.GetTileSize()) - 1; y++)
            {
                Vector2 tempTilePosition = new Vector2((int)(this.position.X / Tile.GetTileSize()) + x, (int)(this.position.Y / Tile.GetTileSize()) + y);

                if (tempTilePosition.X >= 0 && tempTilePosition.X < (Game1.testMap.GetWidth())
                    && tempTilePosition.Y >= 0 && tempTilePosition.Y < (Game1.testMap.GetHeight()))
                {
                    this.tilesToCheck.Add(Game1.testMap.GetTile(tempTilePosition));
                }
            }
        }

        foreach (Tile t in this.tilesToCheck)
        {
            t.setIsCkecked(true);

            if (t.GetTileType() != TileType.transparent)
            {
                Vector2 distance = this.position - t.GetPosition();

                //Console.WriteLine(distance);
                Console.WriteLine((distance + this.origin).X);

                if (((distance + this.origin).X >= 0 && (distance + this.origin).X <= Tile.GetTileSize())
                    || ((distance - this.origin).X >= 0 && (distance - this.origin).X <= Tile.GetTileSize()))
                {
                    Console.WriteLine((distance + this.origin).Y);

                    if ((distance + this.origin).Y <= 0)
                    {
                        if (this.speed.Y > 0)
                        {
                            if ((distance + this.origin + this.speed).Y > 0)
                            {
                                this.position.Y = (t.GetPosition() - this.origin).Y;
                                this.speed.Y = 0;
                            }
                        }
                    }

                    if (((distance - this.origin).Y - Tile.GetTileSize()) <= 0)
                    {
                        if (this.speed.Y < 0)
                        {
                            if (((distance - this.origin + this.speed).Y - Tile.GetTileSize()) < 0)
                            {
                                this.position.Y = (t.GetPosition() + this.origin).Y + Tile.GetTileSize();
                                this.speed.Y = 0;
                            }
                        }
                    }
                }

                if (((distance + this.origin).Y >= 0 && (distance + this.origin).Y <= Tile.GetTileSize())
                    || ((distance - this.origin).Y >= 0 && (distance - this.origin).Y <= Tile.GetTileSize()))
                {
                    if ((distance + this.origin).X <= 0)
                    {
                        if (this.speed.X > 0)
                        {
                            if ((distance + this.origin + this.speed).X > 0)
                            {
                                this.position.X = (t.GetPosition() - this.origin).X;
                                this.speed.X = 0;
                            }
                        }
                    }

                    if (((distance - this.origin).X - Tile.GetTileSize()) >= 0)
                    {
                        if (this.speed.X < 0)
                        {
                            if (((distance - this.origin + this.speed).X - Tile.GetTileSize()) < 0)
                            {
                                this.position.X = (t.GetPosition() + this.origin).X + Tile.GetTileSize();
                                this.speed.X = 0;
                            }
                        }
                    }
                }
            }
        }

        this.tilesToCheck.Clear();
    }

只是想说我猜这些问题一直都在这里突然出现，但如果我真的不需要帮助，我就不会写。