public BackgroundRenderingSample()
{
InitializeComponent();
if (!IsRenderingInBackgroundThread) // In case we are running BackgroundDXEngineRenderer on the Main UI thread, mark that on the GUI
{
BGRenderingTitleTextBlock.TextDecorations.Add(TextDecorations.Strikethrough);
}
// We need to wait until this sample is loaded, otherwise we do not get the correct dpiScale values.
this.Loaded += delegate(object sender, RoutedEventArgs args)
{
// Get dpi scale setting and store that for later
BackgroundDXEngineRenderer.GetActualDpiScaleValues(this, out _dpiScaleX, out _dpiScaleY);
// Create D3DHost control that will host the 3D rendered scene
CreateD3DHost();
// Create MouseCameraController that will allow user to rotate the camera
CreateMouseCameraController();
};
// Subscribe to rendering to collect Main UI thread FPS statistics
CompositionTarget.Rendering += UpdateMainUIThreadFPS;
// We also count mouse move events to see when the UI thread is not responsing well
this.PreviewMouseMove += delegate(object sender, MouseEventArgs args)
{
_uiThreadMouseMovesCount++;
};
// Handle cleanup
this.Unloaded += delegate(object sender, RoutedEventArgs args)
{
if (_targetPositionCamera.IsRotating)
{
_targetPositionCamera.StopRotation();
}
CompositionTarget.Rendering -= UpdateMainUIThreadFPS;
DXViewportBorder.Child = null;
if (_d3dHost != null)
{
_d3dHost.Dispose();
_d3dHost = null;
}
if (_backgroundDXEngineRenderer != null)
{
_backgroundDXEngineRenderer.Dispose();
}
};
}
private void CreateD3DHost()
{
// D3DHost is a control that creates a new window that is hosted inside this WPF application and returns the window's handle (hWnd).
// The hWnd can be used to initialize DXEngine so it will render the 3D scene to the specified area.
// NOTE: The D3DHost is used with DXViewport3D when the PresentationType == DirectXOverlay
_d3dHost = new Ab3d.DirectX.Controls.D3DHost();
_d3dHost.HandleCreated += _d3dHost_HandleCreated;
_d3dHost.Painting += _d3dHost_Painting;
_d3dHost.SizeChanging += _d3dHost_SizeChanging;
// Add D3DHost to this WPF application
DXViewportBorder.Child = _d3dHost;
}
