2D逐像素碰撞检测不起作用

我想提前对我将发布的代码量说声抱歉，但我似乎无法让我的碰撞检测工作起来，当我玩测试时，玩家和物体相互通过，没有任何效果。

我收到0个警告或错误，但Player playerBot对象似乎与我从GLEED2D导入的任何级别项目都没有交互。

我做的一件事是将物品的矩形和颜色数组的值存储在列表中，这样它们就可以很容易地迭代，也许这就是问题的根源。

如果你能发现我的代码不起作用的原因，我将不胜感激。我已经删除了任何绝对不相关的代码，如果有帮助的话，我将使用GLEED2D1.3运行VS2010。

再次感谢。

// Item Class ImageItem Downcast
public class ImageItem : Item
{
    public Texture2D Texture;
}
// Level
Level level;
// Ints
int iNumOfItems = 0;
int iTextureDataListNum = 0;
int iRectangleListNum = 0;
// Lists
List<Color []> itemTextureDataList = new List<Color[]>();
List<Rectangle> itemRectangleList = new List<Rectangle>();
protected override void Initialize()
{
    if (filename.Length > 0) level = Level.FromFile(filename, Content);
    else level = Level.FromFile("level1.xml", Content);
    foreach (Layer layer in level.Layers)
    {
        foreach (Item item in layer.Items)
        {
            iNumOfItems =+ 1;
        }
    }
    // Creates Player Ship
    playerBot = new Player(new Vector2(400f, 240f), new Vector2(0f, 0f));
    base.Initialize();
}
protected override void LoadContent()
{
    Texture2D pixel = new Texture2D(GraphicsDevice, 1, 1, false, SurfaceFormat.Color);
    pixel.SetData(new[] { Color.White });
    spriteBatch = new SpriteBatch(GraphicsDevice);
    // Player Bot
    playerBot.LoadContent(Content, "Images/Player Bot Sprite Sheet", 40, 40, 4);
    // Assigns level textures color data to array
    foreach (Layer layer in level.Layers)
    {
        foreach (Item item in layer.Items)
        {
            ImageItem imageItem = item as ImageItem;
            if (imageItem != null)
            {
                Texture2D texture = imageItem.Texture;
                itemTextureDataList[iTextureDataListNum] = new Color[imageItem.Texture.Width * imageItem.Texture.Height];
                imageItem.Texture.GetData(itemTextureDataList[iTextureDataListNum]);
                iTextureDataListNum++;
            }
        }
    }
    // Creates a rectangle for every level texture
    foreach (Layer layer in level.Layers)
    {
        foreach (Item item in layer.Items)
        {   
            ImageItem imageItem = item as ImageItem;
            if (imageItem != null)
            {
                itemRectangleList[iRectangleListNum] = new Rectangle((int)imageItem.Position.X, (int)imageItem.Position.Y, imageItem.Texture.Width, imageItem.Texture.Height);
                iRectangleListNum++;
            }
        }
    }
    spriteBatch = new SpriteBatch(GraphicsDevice);
}
protected override void Update(GameTime gameTime)
{
    // Player Update
    playerBot.Update(gameTime);
    ((Sprite)playerBot).Update(gameTime);
    // Check for player collisons with level
    for (int i = 0; i < iNumOfItems - 1; i++)
    {
        if (IntersectPixels(playerBot.colRectangle, playerBot.textureDataArray, itemRectangleList[i], itemTextureDataList[i]) == true)
        {
            playerBot.StopMovement();
        }
    }
    base.Update(gameTime);
}
// Level Collision Detection Method
static bool IntersectPixels(Rectangle rectangleA, Color[] dataA, Rectangle rectangleB, Color[] dataB)
{
    // Find the bounds of the rectangle intersection
    int top = Math.Max(rectangleA.Top, rectangleB.Top);
    int bottom = Math.Min(rectangleA.Bottom, rectangleB.Bottom);
    int left = Math.Max(rectangleA.Left, rectangleB.Left);
    int right = Math.Min(rectangleA.Right, rectangleB.Right);
    // Check every point within the intersection bounds
    for (int y = top; y < bottom; y++)
    {
        for (int x = left; x < right; x++)
        {
            // Get the color of both pixels at this point
            Color colorA = dataA[(x - rectangleA.Left) + (y - rectangleA.Top) * rectangleA.Width];
            Color colorB = dataB[(x - rectangleB.Left) + (y - rectangleB.Top) * rectangleB.Width];
            // If both pixels are not completely transparent
            if (colorA.A != 0 && colorB.A != 0)
            {
                // Then an intersection has been found
                return true;
            }
        }
    }
    // No intersection fond
    return false;
}

//精灵级

public void Update(GameTime gameTime)
{
    textureDataArray = new Color[texture.Width * texture.Height];
    texture.GetData(textureDataArray);

//玩家等级

public void StopMovement()
{
    velocity.X *= -1;
    velocity.Y *= -1;
}