如何在 Windows Phone 应用程序中组合 Silverlight 和 XNA Framework

// The current rectangle
Texture2D texture;

// A variety of rectangle colors
Texture2D redTexture;
Texture2D greenTexture;
Texture2D blueTexture;

// If texture is null, we've never loaded our content.
if (null == texture)
{
    redTexture = contentManager.Load<Texture2D>("redRect");
    greenTexture = contentManager.Load<Texture2D>("greenRect");
    blueTexture = contentManager.Load<Texture2D>("blueRect");

    // Start with the red rectangle.
    texture = redTexture;
}

// Used to move the rectangle around the screen
Vector2 spritePosition;
Vector2 spriteSpeed = new Vector2(100.0f, 100.0f);

// Move the sprite by speed, scaled by elapsed time.
spritePosition += spriteSpeed * (float)e.ElapsedTime.TotalSeconds;

int MinX = 0;
int MinY = 0;
int MaxX = SharedGraphicsDeviceManager.Current.GraphicsDevice.Viewport.Width - texture.Width;
int MaxY = SharedGraphicsDeviceManager.Current.GraphicsDevice.Viewport.Height - texture.Height;

// Check for bounce.
if (spritePosition.X > MaxX)
{
    spriteSpeed.X *= -1;
    spritePosition.X = MaxX;
}

else if (spritePosition.X < MinX)
{
    spriteSpeed.X *= -1;
    spritePosition.X = MinX;
}

if (spritePosition.Y > MaxY)
{
    spriteSpeed.Y *= -1;
    spritePosition.Y = MaxY;
}
else if (spritePosition.Y < MinY)
{
    spriteSpeed.Y *= -1;
    spritePosition.Y = MinY;
}

SharedGraphicsDeviceManager.Current.GraphicsDevice.Clear(Color.Black);

// Draw the sprite
spriteBatch.Begin();

// Draw the rectangle in its new position
spriteBatch.Draw(texture, spritePosition, Color.White);

spriteBatch.End();

<!--No XAML content as the page is rendered entirely with XNA-->

<!-- LayoutRoot is the root grid where all page content is placed. -->
<Grid x:Name="LayoutRoot">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>

    <!-- Toggle the visibility of the ColorPanel. -->
    <Button Grid.Row="0" x:Name="ColorPanelToggleButton" Click="ColorPanelToggleButton_Click" Margin="1,0,-1,0">Toggle Color Panel</Button>

    <!-- Arrange buttons in a horizontal line by using StackPanel. -->
    <StackPanel x:Name="ColorPanel" Grid.Row="2"  Height="100" Orientation="Horizontal" HorizontalAlignment="Center" Visibility="Visible">
        <!-- Buttons to set the rectangle to specific colors -->
        <Button Click="redButton_Click" HorizontalAlignment="Center" Height="75" VerticalAlignment="Center" BorderThickness="3" Background="Red" Width="75" />
        <Button Click="greenButton_Click" HorizontalAlignment="Center" Height="75" VerticalAlignment="Center" BorderThickness="3" Background="Lime" Width="75" />
        <Button Click="blueButton_Click" HorizontalAlignment="Center" Height="75" VerticalAlignment="Center" BorderThickness="3" Background="Blue" Width="75" />
    </StackPanel>
</Grid>

// Toggle the visibility of the StackPanel named "ColorPanel".
private void ColorPanelToggleButton_Click(object sender, RoutedEventArgs e)
{
    if (System.Windows.Visibility.Visible == ColorPanel.Visibility)
    {
        ColorPanel.Visibility = System.Windows.Visibility.Collapsed;
    }
    else
    {
        ColorPanel.Visibility = System.Windows.Visibility.Visible;
    }
}

// Switch to the red rectangle.
private void redButton_Click(object sender, RoutedEventArgs e)
{
    texture = redTexture;
}

// Switch to the green rectangle.
private void greenButton_Click(object sender, RoutedEventArgs e)
{
    texture = greenTexture;
}

// Switch to the blue rectangle.
private void blueButton_Click(object sender, RoutedEventArgs e)
{
    texture = blueTexture;
}

// For rendering the XAML onto a texture
UIElementRenderer elementRenderer;

// Use the LayoutUpdate event to know when the page layout 
// has completed so that we can create the UIElementRenderer.
LayoutUpdated += new EventHandler(GamePage_LayoutUpdated);

void GamePage_LayoutUpdated(object sender, EventArgs e)
{
  // Create the UIElementRenderer to draw the XAML page to a texture.

  // Check for 0 because when we navigate away the LayoutUpdate event
  // is raised but ActualWidth and ActualHeight will be 0 in that case.
  if ((ActualWidth > 0) && (ActualHeight > 0))
  {
    SharedGraphicsDeviceManager.Current.PreferredBackBufferWidth = (int)ActualWidth;
    SharedGraphicsDeviceManager.Current.PreferredBackBufferHeight = (int)ActualHeight;
  }

  if (null == elementRenderer)
  {
    elementRenderer = new UIElementRenderer(this, (int)ActualWidth, (int)ActualHeight);
  }
}

// Render the Silverlight controls using the UIElementRenderer.
elementRenderer.Render();

// Using the texture from the UIElementRenderer, 
// draw the Silverlight controls to the screen.
spriteBatch.Draw(elementRenderer.Texture, Vector2.Zero, Color.White);