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POSilverlight Pixel Perfect Collsion Detection
 

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  1. POSilverlight Pixel Perfect Collsion Detection
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    <p>I am working on a project for my Uni, and I am currently stuck on a Pixel Perfect Collision Detection from this website <a href="http://www.andybeaulieu.com/Home/tabid/67/EntryID/160/Default.aspx" rel="nofollow">http://www.andybeaulieu.com/Home/tabid/67/EntryID/160/Default.aspx</a>. I have downloded example project that is using this collsion detection and it is working fine even with my own pictures. I have done the same thing in my project and it is not working. Here is the link to my app: <a href="https://www.cubby.com/pl/LostInTheMath.zip/_dd23e2c827604c068a3fe63ff42d22b2" rel="nofollow">https://www.cubby.com/pl/LostInTheMath.zip/_dd23e2c827604c068a3fe63ff42d22b2</a> could anyone tell me whats wrong with it? Thank you.</p> <p>Here is the main code:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Windows.Media.Imaging; namespace LostInTheMath { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); this.Loaded += new RoutedEventHandler(Page_Loaded); } void Page_Loaded(object sender, RoutedEventArgs e) { CompositionTarget.Rendering += new EventHandler(CompositionTarget_Rendering); } private void UserCntrl_MouseMove(object sender, MouseEventArgs e) { Point pt = e.GetPosition(cnvHitTest); Monkey.SetValue(Canvas.LeftProperty, pt.X); Monkey.SetValue(Canvas.TopProperty, pt.Y); } void CompositionTarget_Rendering(object sender, EventArgs e) { Image MonkeyShell = Monkey.FindName("imgMonkey") as Image; Image Mazer = Maze.FindName("imgMaze") as Image; if (CheckCollision(Monkey, MonkeyShell, Maze, Mazer)) { Monkey.Width = 1000; txtStatus.Text = "Collision with XAML Element!"; return; } txtStatus.Text = string.Empty; } private bool CheckCollision(FrameworkElement control1, FrameworkElement controlElem1, FrameworkElement control2, FrameworkElement controlElem2) { // first see if sprite rectangles collide Rect rect1 = UserControlBounds(control1); Rect rect2 = UserControlBounds(control2); rect1.Intersect(rect2); if (rect1 == Rect.Empty) { // no collision - GET OUT! return false; } else { bool bCollision = false; Point ptCheck = new Point(); // NOTE that creating the writeablebitmap is a bit intense // so we will do this once and store results in Tag property // in a real game, you might abstract this into a Sprite class. if (controlElem1 is Image) controlElem1.Tag = GetWriteableBitmap(control1); if (controlElem2 is Image) controlElem2.Tag = GetWriteableBitmap(control2); // now we do a more accurate pixel hit test for (int x = Convert.ToInt32(rect1.X); x &lt; Convert.ToInt32(rect1.X + rect1.Width); x++) { for (int y = Convert.ToInt32(rect1.Y); y &lt; Convert.ToInt32(rect1.Y + rect1.Height); y++) { ptCheck.X = x; ptCheck.Y = y; if (CheckCollisionPoint(ptCheck, control1, controlElem1)) if (CheckCollisionPoint(ptCheck, control2, controlElem2)) { bCollision = true; break; } } if (bCollision) break; } return bCollision; } } public bool CheckCollisionPoint(Point pt, FrameworkElement control, FrameworkElement controlElem) { if (controlElem is Image) { // NOTE that we saved the WB in the Tag object for performance. // in a real app, you might abstract this in your sprite class. WriteableBitmap wb = controlElem.Tag as WriteableBitmap; int width = wb.PixelWidth; int height = wb.PixelHeight; double offSetX = Convert.ToDouble(control.GetValue(Canvas.LeftProperty)); double offSetY = Convert.ToDouble(control.GetValue(Canvas.TopProperty)); pt.X = pt.X - offSetX; pt.Y = pt.Y - offSetY; int offset = Convert.ToInt32((width * pt.Y) + pt.X); return (wb.Pixels[offset] != 0); } else { List&lt;UIElement&gt; hits = System.Windows.Media.VisualTreeHelper.FindElementsInHostCoordinates(pt, controlElem) as List&lt;UIElement&gt;; return (hits.Contains(controlElem)); } } private WriteableBitmap GetWriteableBitmap(FrameworkElement control) { WriteableBitmap wb = new WriteableBitmap((int)control.Width, (int)control.Height); ; wb.Render(control, new TranslateTransform()); wb.Invalidate(); return wb; } public Rect UserControlBounds(FrameworkElement control) { Point ptTopLeft = new Point(Convert.ToDouble(control.GetValue(Canvas.LeftProperty)), Convert.ToDouble(control.GetValue(Canvas.TopProperty))); Point ptBottomRight = new Point(Convert.ToDouble(control.GetValue(Canvas.LeftProperty)) + control.Width, Convert.ToDouble(control.GetValue(Canvas.TopProperty)) + control.Height); return new Rect(ptTopLeft, ptBottomRight); } } } </code></pre>
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    1. USDanielok1993
    1. USDanielok1993
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    1. COit would be good if you post your source-code here
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      1. POSilverlight Pixel Perfect Collsion Detection
      1. USDirty-flow
    2. COThe thing is that the code is exactly the same as the one from the example project and it is not working neither I get any errors.
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      1. POSilverlight Pixel Perfect Collsion Detection
      1. USDanielok1993
 

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