private void UpdateShadowSettings()
{
if (MainDXViewportView.DXScene == null) // Probably using WPF 3D rendering
{
return;
}
// When the ShadowMapSize or ShadowDepthBluringSize is changed,
// we need to dispose the current VarianceShadowRenderingProvider and create a new one
if (_varianceShadowRenderingProvider != null &&
(_varianceShadowRenderingProvider.ShadowMapSize != _shadowMapSize ||
_varianceShadowRenderingProvider.ShadowDepthBluringSize != _shadowDepthBluringSize))
{
MainDXViewportView.DXScene.InitializeShadowRendering(null);
_varianceShadowRenderingProvider.Dispose();
_varianceShadowRenderingProvider = null;
}
if (_varianceShadowRenderingProvider == null)
{
_varianceShadowRenderingProvider = new VarianceShadowRenderingProvider()
{
ShadowMapSize = _shadowMapSize,
ShadowDepthBluringSize = _shadowDepthBluringSize,
ShadowThreshold = _shadowThreshold,
ShadowDepthBias = _shadowDepthBias
};
MainDXViewportView.DXScene.InitializeShadowRendering(_varianceShadowRenderingProvider);
}
else
{
// ShadowThreshold can be changed without reinitializing the shadow rendering
_varianceShadowRenderingProvider.ShadowThreshold = _shadowThreshold;
_varianceShadowRenderingProvider.ShadowDepthBias = _shadowDepthBias;
}
UpdateCastingShadowLight();
MainDXViewportView.Refresh(); // Render the scene again
}
public ShadowRenderingSample()
{
InitializeComponent();
// Default values can be get before Loaded event
_shadowMapSize = 512;
_shadowDepthBluringSize = 4;
_shadowTreshold = 0.2f;
CreateCustomScene();
CreateLights();
CreateLightSphere();
_isShadowEnabled = true;
UpdateCastingShadowLight();
MainDXViewportView.DXSceneInitialized += delegate(object sender, EventArgs args)
{
if (MainDXViewportView.DXScene == null)
{
return; // Probably WPF 3D rendering
}
// The DXScene.InitializeShadowRendering method must be called with the VarianceShadowRenderingProvider.
// The VarianceShadowRenderingProvider controls the rendering of shadows.
//
// Variance shadow rendering technique can produce nice shadows with soft edges and without the artifacts that are common for some other shadow rendering (Peter panning or Self shadowing).
// More info can be read in the GPU Gems3 "Chapter 8. Summed-Area Variance Shadow Maps" (https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch08.html)
_varianceShadowRenderingProvider = new VarianceShadowRenderingProvider();
// ShadowMapSize represents the size of a shadow depth map texture. For example value 512 means that a 512 x 512 texture will be used.
// The shadow depth map texture is used to store depth information - distance of a pixel from the light.
// Bigger texture will produce more detailed shadows but will be slower to render.
// Also, to bigger texture will require bigger blur amount to achieve nice soft edges.
// NOTE: Changing the ShadowMapSize after the VarianceShadowRenderingProvider has been initialized has no effect - see UpdateShadowSettings method in this file to see how to change the value
_varianceShadowRenderingProvider.ShadowMapSize = _shadowMapSize;
// ShadowDepthBluringSize specifies the blur amount that is applied on the shadow depth map and can produce shadows with nice soft edges.
// Default value is 4.
_varianceShadowRenderingProvider.ShadowDepthBluringSize = _shadowDepthBluringSize;
// ShadowTreshold is a float value that helps prevent light bleeding (having areas that should be in shadow fully illuminated) for variance shadow mapping.
// The value is used to map all shadow values from 0 ... ShadowTreshold to 0 and then linearly rescale the values from ShadowTreshold to 1 into 0 to 1.
// For more info see "Shadow bleeding" in "Chapter 8. Summed-Area Variance Shadow Maps" (https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch08.html)
_varianceShadowRenderingProvider.ShadowTreshold = _shadowTreshold;
// Initialize shadow rendering
MainDXViewportView.DXScene.InitializeShadowRendering(_varianceShadowRenderingProvider);
// When the scene is initialized, we can get the SceneNode that is created from WPF teapot model.
// This will be used later (in OnObjectsFilterValueChanged) to enable or disable casting and receiving shadow.
_teapotSceneNode = MainDXViewportView.GetSceneNodeForWpfObject(_teapotModel) as WpfGeometryModel3DNode;
// To use FilterObjectsFunction to filter which objects are casting and receiving shadow, uncomment the lines below (see comment in OnObjectsFilterValueChanged method for more info):
//_varianceShadowRenderingProvider.RenderShadowDepthRenderingStep.FilterObjectsFunction = FilterNonTeapotObjectsFunction;
//_varianceShadowRenderingProvider.RenderNonShadowObjectsRenderingStep.FilterObjectsFunction = FilterTeapotObjectsFunction;
//MainDXViewportView.DXScene.DefaultRenderObjectsRenderingStep.FilterObjectsFunction = FilterNonTeapotObjectsFunction;
// IMPORTANT:
// Af least one light need to set to cast shadow. This can be done with the following code:
//_directionalLight.SetDXAttribute(DXAttributeType.IsCastingShadow, true);
};
StartLightAnimation();
this.Unloaded += delegate(object sender, RoutedEventArgs args)
{
StopLightAnimation();
if (_varianceShadowRenderingProvider != null)
{
_varianceShadowRenderingProvider.Dispose();
}
MainDXViewportView.Dispose();
};
this.PreviewKeyDown += OnPreviewKeyDown;
// This will allow receiving keyboard events
this.Focusable = true;
this.Focus();
}
public DucksLakeDemo()
{
InitializeComponent();
MouseCameraControllerInfo1.AddCustomInfoLine(0, MouseCameraController.MouseAndKeyboardConditions.LeftMouseButtonPressed, "Select duck");
_duckModel3D = LoadDuckModel();
_eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
_eventManager3D.CustomEventsSourceElement = ViewportBorder;
MainDXViewportView.DXSceneInitialized += delegate(object sender, EventArgs args)
{
if (MainDXViewportView.DXScene == null)
{
return; // Probably WPF 3D rendering
}
// Setup shadow rendering
_varianceShadowRenderingProvider = new VarianceShadowRenderingProvider();
// Because we have a big green plane, we need to increase the shadow map size (increase this more to get a more detailed shadow).
_varianceShadowRenderingProvider.ShadowMapSize = 1024;
MainDXViewportView.DXScene.InitializeShadowRendering(_varianceShadowRenderingProvider);
// Specify the light that cases shadow(note that point light is not supported - only DirectionalLight and SpotLight are supported).
MainSceneLight.SetDXAttribute(DXAttributeType.IsCastingShadow, true);
};
this.Focusable = true; // by default Page is not focusable and therefore does not receive keyDown event
this.PreviewKeyDown += OnPreviewKeyDown;
this.Focus();
// We need to synchronize the Camera in OverlayViewport with the camera in the MainViewport
Camera1.CameraChanged += delegate(object s, CameraChangedRoutedEventArgs args)
{
OverlayViewport.Camera = MainViewport.Camera;
};
this.Loaded += delegate(object sender, RoutedEventArgs args)
{
GenerateRandomDucks(10);
ShowModelMover();
};
// IMPORTANT:
// It is very important to call Dispose method on DXSceneView after the control is not used any more (see help file for more info)
this.Unloaded += delegate(object sender, RoutedEventArgs args)
{
if (_varianceShadowRenderingProvider != null)
{
_varianceShadowRenderingProvider.Dispose();
}
MainDXViewportView.Dispose();
};
}
private void InitializeOvrAndDirectX()
{
if (UseOculusRift)
{
// Initializing Oculus VR is very simple when using OculusWrapVirtualRealityProvider
// First we create an instance of OculusWrapVirtualRealityProvider
_oculusRiftVirtualRealityProvider = new OculusWrapVirtualRealityProvider(_ovr, multisamplingCount: 4);
try
{
// Then we initialize Oculus OVR and create a new DXDevice that uses the same adapter (graphic card) as Oculus Rift
_dxDevice = _oculusRiftVirtualRealityProvider.InitializeOvrAndDXDevice(requestedOculusSdkMinorVersion: 17);
}
catch (Exception ex)
{
MessageBox.Show("Failed to initialize the Oculus runtime library.\r\nError: " + ex.Message, "Oculus error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
string ovrVersionString = _ovr.GetVersionString();
_originalWindowTitle = string.Format("DXEngine OculusWrap Sample (OVR v{0})", ovrVersionString);
this.Title = _originalWindowTitle;
// Reset tracking origin at startup
_ovr.RecenterTrackingOrigin(_oculusRiftVirtualRealityProvider.SessionPtr);
}
else
{
// Create DXDevice that will be used to create DXViewportView
var dxDeviceConfiguration = new DXDeviceConfiguration();
dxDeviceConfiguration.DriverType = DriverType.Hardware;
dxDeviceConfiguration.SupportedFeatureLevels = new FeatureLevel[] { FeatureLevel.Level_11_0 }; // Oculus requires at least feature level 11.0
_dxDevice = new DXDevice(dxDeviceConfiguration);
_dxDevice.InitializeDevice();
_originalWindowTitle = this.Title;
}
// Create WPF's Viewport3D
_viewport3D = new Viewport3D();
// Create DXViewportView - a control that will enable DirectX 11 rendering of standard WPF 3D content defined in Viewport3D.
// We use a specified DXDevice that was created by the _oculusRiftVirtualRealityProvider.InitializeOvrAndDXDevice (this way the same adapter is used by Oculus and DXEngine).
_dxViewportView = new DXViewportView(_dxDevice, _viewport3D);
_dxViewportView.BackgroundColor = Colors.Aqua;
// Currently DXEngine support showing Oculus mirror texture only with DirectXOverlay presentation type (not with DirectXImage)
_dxViewportView.PresentationType = DXView.PresentationTypes.DirectXOverlay;
if (UseOculusRift)
{
// The _dxViewportView will show Oculus mirrow window.
// The mirror window can be any size, for this sample we use 1/2 the HMD resolution.
_dxViewportView.Width = _oculusRiftVirtualRealityProvider.HmdDescription.Resolution.Width / 2.0;
_dxViewportView.Height = _oculusRiftVirtualRealityProvider.HmdDescription.Resolution.Height / 2.0;
}
// When the DXViewportView is initialized, we set the _oculusRiftVirtualRealityProvider to the DXScene object
_dxViewportView.DXSceneInitialized += delegate(object sender, EventArgs args)
{
if (_dxViewportView.UsedGraphicsProfile.DriverType != GraphicsProfile.DriverTypes.Wpf3D &&
_dxViewportView.DXScene != null &&
_oculusRiftVirtualRealityProvider != null)
{
// Initialize Virtual reality rendering
_dxViewportView.DXScene.InitializeVirtualRealityRendering(_oculusRiftVirtualRealityProvider);
// Initialized shadow rendering (see Ab3d.DXEngine.Wpf.Samples project - DXEngine/ShadowRenderingSample for more info
_varianceShadowRenderingProvider = new VarianceShadowRenderingProvider()
{
ShadowMapSize = 1024,
ShadowDepthBluringSize = 2,
ShadowTreshold = 0.2f
};
_dxViewportView.DXScene.InitializeShadowRendering(_varianceShadowRenderingProvider);
}
};
// Enable collecting rendering statistics (see _dxViewportView.DXScene.Statistics class)
DXDiagnostics.IsCollectingStatistics = true;
// Subscribe to SceneRendered to collect FPS statistics
_dxViewportView.SceneRendered += DXViewportViewOnSceneRendered;
// Add _dxViewportView to the RootGrid
// Before that we resize the window to be big enough to show the mirrored texture
this.Width = _dxViewportView.Width + 30;
this.Height = _dxViewportView.Height + 50;
RootGrid.Children.Add(_dxViewportView);
// Create FirstPersonCamera
_camera = new FirstPersonCamera()
{
TargetViewport3D = _viewport3D,
Position = new Point3D(0, 1, 4),
Heading = 0,
Attitude = 0,
ShowCameraLight = ShowCameraLightType.Never
};
RootGrid.Children.Add(_camera);
// Initialize XBOX controller that will control the FirstPersonCamera
_xInputCameraController = new XInputCameraController();
_xInputCameraController.TargetCamera = _camera;
_xInputCameraController.MovementSpeed = 0.02;
_xInputCameraController.MoveVerticallyWithDPadButtons = true;
// We handle the rotation by ourself to prevent rotating the camera up and down - this is done only by HMD
_xInputCameraController.RightThumbChanged += delegate(object sender, XInputControllerThumbChangedEventArgs e)
{
// Apply only horizontal rotation
_camera.Heading += e.NormalizedX * _xInputCameraController.RotationSpeed;
// Mark the event as handled
e.IsHandled = true;
};
_xInputCameraController.StartCheckingController();
// Now we can create our sample 3D scene
CreateSceneObjects();
// Add lights
var lightsVisual3D = new ModelVisual3D();
var lightsGroup = new Model3DGroup();
var directionalLight = new DirectionalLight(Colors.White, new Vector3D(0.5, -0.3, -0.3));
directionalLight.SetDXAttribute(DXAttributeType.IsCastingShadow, true); // Set this light to cast shadow
lightsGroup.Children.Add(directionalLight);
var ambientLight = new AmbientLight(System.Windows.Media.Color.FromRgb(30, 30, 30));
lightsGroup.Children.Add(ambientLight);
lightsVisual3D.Content = lightsGroup;
_viewport3D.Children.Add(lightsVisual3D);
// Start rendering
if (RenderAt90Fps)
{
// WPF do not support rendering at more the 60 FPS.
// But with a trick where a rendering loop is created in a background thread, it is possible to achieve more than 60 FPS.
// In case of sumbiting frames to Oculus Rift, the ovr.SubmitFrame method will limit rendering to 90 FPS.
//
// NOTE:
// When using DXEngine, it is also possible to render the scene in a background thread.
// This requires that the 3D scene is also created in the background thread and that the events and other messages are
// passed between UI and background thread in a thread safe way. This is too complicated for this simple sample project.
// To see one possible implementation of background rendering, see the BackgroundRenderingSample in the Ab3d.DXEngine.Wpf.Samples project.
var backgroundWorker = new BackgroundWorker();
backgroundWorker.DoWork += (object sender, DoWorkEventArgs args) =>
{
// Create an action that will be called by Dispatcher
var refreshDXEngineAction = new Action(() =>
{
UpdateScene();
// Render DXEngine's 3D scene again
if (_dxViewportView != null)
{
_dxViewportView.Refresh();
}
});
while (_dxViewportView != null && !_dxViewportView.IsDisposed) // Render until window is closed
{
if (_oculusRiftVirtualRealityProvider != null && _oculusRiftVirtualRealityProvider.LastSessionStatus.ShouldQuit) // Stop rendering - this will call RunWorkerCompleted where we can quit the application
{
break;
}
// Sleep for 1 ms to allow WPF tasks to complete (for example handling XBOX controller events)
System.Threading.Thread.Sleep(1);
// Call Refresh to render the DXEngine's scene
// This is a synchronous call and will wait until the scene is rendered.
// Because Oculus is limited to 90 fps, the call to ovr.SubmitFrame will limit rendering to 90 FPS.
Dispatcher.Invoke(refreshDXEngineAction);
}
};
backgroundWorker.RunWorkerCompleted += delegate(object sender, RunWorkerCompletedEventArgs args)
{
if (_oculusRiftVirtualRealityProvider != null && _oculusRiftVirtualRealityProvider.LastSessionStatus.ShouldQuit)
{
this.Close(); // Exit the application
}
};
backgroundWorker.RunWorkerAsync();
}
else
{
// Subscribe to WPF rendering event (called approximately 60 times per second)
CompositionTarget.Rendering += CompositionTargetOnRendering;
}
}
