private void DisposeDXViewportView()
{
if (_mainDXViewportView == null)
{
return;
}
if (_camera1 != null)
{
_camera1.StopRotation();
RootGrid.Children.Remove(_camera1);
_camera1 = null;
}
if (_mouseCameraController != null)
{
RootGrid.Children.Remove(_mouseCameraController);
_mouseCameraController = null;
}
_mainDXViewportView.SceneRendered -= MainDxViewportViewOnSceneRendered;
_mainDXViewportView.Dispose();
_mainDXViewportView = null;
}
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 ToggleCameraAnimation()
{
if (_targetPositionCamera.IsRotating)
{
_targetPositionCamera.StopRotation();
animateButton.Text = "Start animation";
}
else
{
_targetPositionCamera.StartRotation(10, 0); // animate the camera with changing heading for 10 degrees in one second
animateButton.Text = "Stop animation";
}
}
