//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="LuminanceFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public LuminanceFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/LuminanceFilter");
_useGeometricMeanParameter = _effect.Parameters["UseGeometricMean"];
_useAdaptionParameter = _effect.Parameters["UseAdaption"];
_deltaTimeParameter = _effect.Parameters["DeltaTime"];
_adaptionSpeedParameter = _effect.Parameters["AdaptionSpeed"];
_lastLuminanceTextureParameter = _effect.Parameters["LastLuminanceTexture"];
_textureParameter = _effect.Parameters["SourceTexture"];
_sourceSizeParameter = _effect.Parameters["SourceSize"];
_targetSizeParameter = _effect.Parameters["TargetSize"];
_createPass = _effect.CurrentTechnique.Passes["Create"];
_downsamplePass = _effect.CurrentTechnique.Passes["Downsample"];
_finalPass = _effect.CurrentTechnique.Passes["Final"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
UseGeometricMean = true;
UseAdaption = true;
AdaptionSpeed = 0.02f;
DefaultTargetFormat = new RenderTargetFormat(1, 1, false, SurfaceFormat.HalfVector4, DepthFormat.None);
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="PostProcessor"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
protected PostProcessor(IGraphicsService graphicsService)
{
if (graphicsService == null)
throw new ArgumentNullException("graphicsService");
GraphicsService = graphicsService;
_enabled = true; // Note: Virtual OnEnabled must not be called in constructor.
DefaultTargetFormat = new RenderTargetFormat(null, null, false, null, DepthFormat.None);
}
protected override void OnProcess(RenderContext context)
{
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
throw new GraphicsException("Source texture format must not be a floating-point format.");
}
var graphicsDevice = GraphicsService.GraphicsDevice;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
_pixelSizeParameter.SetValue(new Vector2(1.0f / targetWidth, 1.0f / targetHeight));
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
// Cannot use render target from pool because we need a stencil buffer.
//var edgeRenderTarget = graphicsService.RenderTargetPool.Obtain2D(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
//var blendRenderTarget = graphicsService.RenderTargetPool.Obtain2D(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.None);
var edgeRenderTarget = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
var blendRenderTarget = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
//graphicsDevice.DepthStencilState = _stencilStateReplace;
graphicsDevice.SetRenderTarget(edgeRenderTarget);
// Clear color + stencil buffer.
//graphicsDevice.Clear(ClearOptions.Target | ClearOptions.Stencil, new Color(0, 0, 0, 0), 1, 0);
graphicsDevice.Clear(ClearOptions.Target, new Color(0, 0, 0, 0), 1, 0);
_sourceTextureParameter.SetValue(context.SourceTexture);
_lumaEdgeDetectionPass.Apply();
graphicsDevice.DrawFullScreenQuad();
//graphicsDevice.DepthStencilState = _stencilStateKeep;
graphicsDevice.SetRenderTarget(blendRenderTarget);
//graphicsDevice.Clear(ClearOptions.Target, new Color(0, 0, 0, 0), 1, 1);
_edgesTextureParameter.SetValue(edgeRenderTarget);
_areaLookupTextureParameter.SetValue(_areaLookupTexture);
_searchLookupTextureParameter.SetValue(_searchLookupTexture);
_blendWeightCalculationPass.Apply();
graphicsDevice.DrawFullScreenQuad();
//graphicsDevice.DepthStencilState = DepthStencilState.None;
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_blendTextureParameter.SetValue(blendRenderTarget);
_neighborhoodBlendingPass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
_edgesTextureParameter.SetValue((Texture2D)null);
_blendTextureParameter.SetValue((Texture2D)null);
GraphicsService.RenderTargetPool.Recycle(blendRenderTarget);
GraphicsService.RenderTargetPool.Recycle(edgeRenderTarget);
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="PostProcessor"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
protected PostProcessor(IGraphicsService graphicsService)
{
if (graphicsService == null)
{
throw new ArgumentNullException("graphicsService");
}
GraphicsService = graphicsService;
_enabled = true; // Note: Virtual OnEnabled must not be called in constructor.
DefaultTargetFormat = new RenderTargetFormat(null, null, false, null, DepthFormat.None);
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
// Blur source texture.
var tempFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
var blurredImage = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
context.RenderTarget = blurredImage;
context.Viewport = new Viewport(0, 0, blurredImage.Width, blurredImage.Height);
Blur.Process(context);
// Unsharp masking.
context.RenderTarget = target;
context.Viewport = viewport;
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sharpnessParameter.SetValue(Sharpness);
_sourceTextureParameter.SetValue(source);
_blurredTextureParameter.SetValue(blurredImage);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
_blurredTextureParameter.SetValue((Texture2D)null);
GraphicsService.RenderTargetPool.Recycle(blurredImage);
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
RenderTarget2D rgbLuma = null;
if (ComputeLuminance)
{
var rgbLumaFormat = new RenderTargetFormat(
context.SourceTexture.Width,
context.SourceTexture.Height,
false,
context.SourceTexture.Format,
DepthFormat.None);
rgbLuma = renderTargetPool.Obtain2D(rgbLumaFormat);
graphicsDevice.SetRenderTarget(rgbLuma);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_luminanceToAlphaPass.Apply();
graphicsDevice.DrawFullScreenQuad();
}
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(ComputeLuminance ? rgbLuma : context.SourceTexture);
_fxaaPass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(rgbLuma);
}
// Renders the sky. This method is the RenderCallback of the SceneCaptureNode.
private void RenderSky(RenderContext context)
{
var graphicsDevice = _graphicsService.GraphicsDevice;
var renderTargetPool = _graphicsService.RenderTargetPool;
// We have to render into this render target.
var ldrTarget = context.RenderTarget;
// Reset render states.
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
// Use an intermediate HDR render target with the same resolution as the final target.
var format = new RenderTargetFormat(ldrTarget)
{
SurfaceFormat = SurfaceFormat.HdrBlendable,
DepthStencilFormat = DepthFormat.Depth24Stencil8
};
var hdrTarget = renderTargetPool.Obtain2D(format);
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
graphicsDevice.Clear(Color.Black);
// Render the sky.
_skyRenderer.Render(_skyGroupNode.Children, context);
// Convert the HDR image to RGBM image.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Clean up.
renderTargetPool.Recycle(hdrTarget);
context.RenderTarget = ldrTarget;
}
/// <summary>
/// Renders the environment maps for the image-based lights.
/// </summary>
/// <remarks>
/// This method uses the current DeferredGraphicsScreen to render new environment maps at
/// runtime. The DeferredGraphicsScreen has a SceneCaptureRenderer which we can use to
/// capture environment maps of the current scene.
/// To capture new environment maps the flag _updateEnvironmentMaps must be set to true.
/// When this flag is set, SceneCaptureNodes are added to the scene. When the graphics
/// screen calls the SceneCaptureRenderer the next time, the new environment maps will be
/// captured.
/// The flag _updateEnvironmentMaps remains true until the new environment maps are available.
/// This method checks the SceneCaptureNode.LastFrame property to check if new environment maps
/// have been computed. Usually, the environment maps will be available in the next frame.
/// (However, the XNA Game class can skip graphics rendering if the game is running slowly.
/// Then we would have to wait more than 1 frame.)
/// When environment maps are being rendered, the image-based lights are disabled to capture
/// only the scene with ambient and directional lights. Dynamic objects are also disabled
/// to capture only the static scene.
/// </remarks>
private void UpdateEnvironmentMaps()
{
if (!_updateEnvironmentMaps)
{
return;
}
// One-time initializations:
if (_sceneCaptureNodes[0] == null)
{
// Create cube maps and scene capture nodes.
// (Note: A cube map size of 256 is enough for surfaces with a specular power
// in the range [0, 200000].)
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
var renderTargetCube = new RenderTargetCube(
GraphicsService.GraphicsDevice,
256,
true,
SurfaceFormat.Color,
DepthFormat.None);
var renderToTexture = new RenderToTexture {
Texture = renderTargetCube
};
var projection = new PerspectiveProjection();
projection.SetFieldOfView(ConstantsF.PiOver2, 1, 1, 100);
_sceneCaptureNodes[i] = new SceneCaptureNode(renderToTexture)
{
CameraNode = new CameraNode(new Camera(projection))
{
PoseWorld = _lightNodes[i].PoseWorld,
},
};
_imageBasedLights[i].Texture = renderTargetCube;
}
// We use a ColorEncoder to encode a HDR image in a normal Color texture.
_colorEncoder = new ColorEncoder(GraphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = ColorEncoding.Rgbm,
};
// The SceneCaptureRenderer has a render callback which defines what is rendered
// into the scene capture render targets.
_graphicsScreen.SceneCaptureRenderer.RenderCallback = context =>
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// Get scene nodes which are visible by the current camera.
CustomSceneQuery sceneQuery = context.Scene.Query <CustomSceneQuery>(context.CameraNode, context);
// The final image has to be rendered into this render target.
var ldrTarget = context.RenderTarget;
// Use an intermediate HDR render target with the same resolution as the final target.
var format = new RenderTargetFormat(ldrTarget)
{
SurfaceFormat = SurfaceFormat.HdrBlendable,
DepthStencilFormat = DepthFormat.Depth24Stencil8
};
var hdrTarget = renderTargetPool.Obtain2D(format);
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
// Render scene (without post-processing, without lens flares, no debug rendering, no reticle).
_graphicsScreen.RenderScene(sceneQuery, context, false, false, false, false);
// Convert the HDR image to RGBM image.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Clean up.
renderTargetPool.Recycle(hdrTarget);
context.RenderTarget = ldrTarget;
};
}
if (_sceneCaptureNodes[0].Parent == null)
{
// Add the scene capture nodes to the scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
_graphicsScreen.Scene.Children.Add(_sceneCaptureNodes[i]);
}
// Remember the old time stamp of the nodes.
_oldEnvironmentMapTimeStamp = _sceneCaptureNodes[0].LastFrame;
// Disable all lights except ambient and directional lights.
// We do not capture the image-based lights or any other lights (e.g. point lights)
// in the cube map.
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType <LightNode>())
{
lightNode.IsEnabled = (lightNode.Light is AmbientLight) || (lightNode.Light is DirectionalLight);
}
// Disable dynamic objects.
foreach (var node in _graphicsScreen.Scene.GetDescendants())
{
if (node is MeshNode || node is LodGroupNode)
{
if (!node.IsStatic)
{
node.IsEnabled = false;
}
}
}
}
else
{
// The scene capture nodes are part of the scene. Check if they have been
// updated.
if (_sceneCaptureNodes[0].LastFrame != _oldEnvironmentMapTimeStamp)
{
// We have new environment maps. Restore the normal scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
_graphicsScreen.Scene.Children.Remove(_sceneCaptureNodes[i]);
}
_updateEnvironmentMaps = false;
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType <LightNode>())
{
lightNode.IsEnabled = true;
}
foreach (var node in _graphicsScreen.Scene.GetDescendants())
{
if (node is MeshNode || node is LodGroupNode)
{
if (!node.IsStatic)
{
node.IsEnabled = true;
}
}
}
}
}
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="LuminanceFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public LuminanceFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/LuminanceFilter");
_useGeometricMeanParameter = _effect.Parameters["UseGeometricMean"];
_useAdaptionParameter = _effect.Parameters["UseAdaption"];
_deltaTimeParameter = _effect.Parameters["DeltaTime"];
_adaptionSpeedParameter = _effect.Parameters["AdaptionSpeed"];
_lastLuminanceTextureParameter = _effect.Parameters["LastLuminanceTexture"];
_textureParameter = _effect.Parameters["SourceTexture"];
_sourceSizeParameter = _effect.Parameters["SourceSize"];
_targetSizeParameter = _effect.Parameters["TargetSize"];
_createPass = _effect.CurrentTechnique.Passes["Create"];
_downsamplePass = _effect.CurrentTechnique.Passes["Downsample"];
_finalPass = _effect.CurrentTechnique.Passes["Final"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
UseGeometricMean = true;
UseAdaption = true;
AdaptionSpeed = 0.02f;
DefaultTargetFormat = new RenderTargetFormat(1, 1, false, SurfaceFormat.HalfVector4, DepthFormat.None);
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var viewport = context.Viewport;
Vector2 size = new Vector2(viewport.Width, viewport.Height);
// Choose suitable technique.
// We do not have shader for each sample count.
int numberOfSamples = NumberOfSamples;
SetCurrentTechnique(ref numberOfSamples);
// Apply current scale and texture size to offsets.
for (int i = 0; i < NumberOfSamples; i++)
{
_horizontalOffsets[i].X = Offsets[i].X * Scale / size.X;
_horizontalOffsets[i].Y = Offsets[i].Y * Scale / size.Y;
}
// Make sure the other samples are 0 (e.g. if we want 11 samples but the
// next best shader supports only 15 samples).
for (int i = NumberOfSamples; i < numberOfSamples; i++)
{
_horizontalOffsets[i].X = 0;
_horizontalOffsets[i].Y = 0;
Weights[i] = 0;
}
// If we have a separable filter, we initialize _verticalOffsets too.
if (IsSeparable)
{
if (_verticalOffsets == null)
_verticalOffsets = new Vector2[MaxNumberOfSamples];
float aspectRatio = size.X / size.Y;
for (int i = 0; i < NumberOfSamples; i++)
{
_verticalOffsets[i].X = _horizontalOffsets[i].Y * aspectRatio;
_verticalOffsets[i].Y = _horizontalOffsets[i].X * aspectRatio;
}
for (int i = NumberOfSamples; i < numberOfSamples; i++)
{
_verticalOffsets[i].X = 0;
_verticalOffsets[i].Y = 0;
}
}
// Use hardware filtering if possible.
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
bool isAnisotropic = IsAnisotropic;
bool isBilateral = IsBilateral;
if (FilterInLogSpace)
{
// Anisotropic and bilateral filtering in log-space is not implemented.
isAnisotropic = false;
isBilateral = false;
}
else
{
if (isAnisotropic || isBilateral)
{
context.ThrowIfCameraMissing();
var cameraNode = context.CameraNode;
var projection = cameraNode.Camera.Projection;
float far = projection.Far;
GraphicsHelper.GetFrustumFarCorners(cameraNode.Camera.Projection, _frustumFarCorners);
_parameterFrustumCorners.SetValue(_frustumFarCorners);
_parameterBlurParameters0.SetValue(new Vector4(
far,
viewport.AspectRatio,
1.0f / (EdgeSoftness + 0.001f) * far,
DepthScaling));
context.ThrowIfGBuffer0Missing();
Texture2D depthBuffer = context.GBuffer0;
if (viewport.Width < depthBuffer.Width && viewport.Height < depthBuffer.Height)
{
// Use half-resolution depth buffer.
object obj;
if (context.Data.TryGetValue(RenderContextKeys.DepthBufferHalf, out obj))
{
var depthBufferHalf = obj as Texture2D;
if (depthBufferHalf != null)
depthBuffer = depthBufferHalf;
}
}
_parameterGBuffer0.SetValue(depthBuffer);
}
}
_parameterViewportSize.SetValue(size);
_parameterWeights.SetValue(Weights);
int effectiveNumberOfPasses = IsSeparable ? NumberOfPasses * 2 : NumberOfPasses;
// We use up to two temporary render targets for ping-ponging.
var tempFormat = new RenderTargetFormat((int)size.X, (int)size.Y, false, context.SourceTexture.Format, DepthFormat.None);
var tempTarget0 = (effectiveNumberOfPasses > 1)
? renderTargetPool.Obtain2D(tempFormat)
: null;
var tempTarget1 = (effectiveNumberOfPasses > 2)
? renderTargetPool.Obtain2D(tempFormat)
: null;
for (int i = 0; i < effectiveNumberOfPasses; i++)
{
if (i == effectiveNumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(tempTarget0);
}
else
{
graphicsDevice.SetRenderTarget(tempTarget1);
}
if (i == 0)
_parameterSourceTexture.SetValue(context.SourceTexture);
else if (i % 2 == 0)
_parameterSourceTexture.SetValue(tempTarget1);
else
_parameterSourceTexture.SetValue(tempTarget0);
Vector2[] offsets;
if (IsSeparable && i % 2 != 0
&& !isAnisotropic) // The anisotropic filter only reads Offsets[i].x
{
offsets = _verticalOffsets;
}
else
{
offsets = _horizontalOffsets;
}
_parameterOffsets.SetValue(offsets);
int passIndex = 0;
if (isAnisotropic)
passIndex = i % 2;
_effect.CurrentTechnique.Passes[passIndex].Apply();
graphicsDevice.DrawFullScreenQuad();
}
_parameterSourceTexture.SetValue((Texture2D)null);
renderTargetPool.Recycle(tempTarget0);
renderTargetPool.Recycle(tempTarget1);
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var cameraNode = context.CameraNode;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
Projection projection = cameraNode.Camera.Projection;
Matrix projMatrix = projection;
float near = projection.Near;
float far = projection.Far;
_frustumInfoParameter.SetValue(new Vector4(
projection.Left / near,
projection.Top / near,
(projection.Right - projection.Left) / near,
(projection.Bottom - projection.Top) / near));
_numberOfAOSamplesParameter.SetValue(NumberOfSamples);
// The height of a 1 unit object 1 unit in front of the camera.
// (Compute 0.5 unit multiply by 2 and divide by 2 to convert from [-1, 1] to [0, 1] range.)
float projectionScale =
projMatrix.TransformPosition(new Vector3(0, 0.5f, -1)).Y
- projMatrix.TransformPosition(new Vector3(0, 0, -1)).Y;
_aoParameters0.SetValue(new Vector4(
projectionScale,
Radius,
Strength / (float)Math.Pow(Radius, 6),
Bias));
_aoParameters1.SetValue(new Vector4(
viewport.Width,
viewport.Height,
far,
MaxOcclusion));
_aoParameters2.SetValue(new Vector4(
SampleDistribution,
1.0f / (EdgeSoftness + 0.001f) * far,
BlurScale,
MinBias));
context.ThrowIfGBuffer0Missing();
_gBuffer0Parameter.SetValue(context.GBuffer0);
//var view = cameraNode.View;
//_viewParameter.SetValue((Matrix)view);
//_gBuffer1Parameter.SetValue(context.GBuffer1);
// We use two temporary render targets.
var format = new RenderTargetFormat(
context.Viewport.Width,
context.Viewport.Height,
false,
SurfaceFormat.Color,
DepthFormat.None);
var tempTarget0 = renderTargetPool.Obtain2D(format);
var tempTarget1 = renderTargetPool.Obtain2D(format);
// Create SSAO.
graphicsDevice.SetRenderTarget(tempTarget0);
_createAOPass.Apply();
graphicsDevice.Clear(new Color(1.0f, 1.0f, 1.0f, 1.0f));
graphicsDevice.DrawFullScreenQuad();
// Horizontal blur.
graphicsDevice.SetRenderTarget(tempTarget1);
_occlusionTextureParameter.SetValue(tempTarget0);
_blurHorizontalPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Vertical blur
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_occlusionTextureParameter.SetValue(tempTarget1);
if (!CombineWithSource)
{
_blurVerticalPass.Apply();
}
else
{
if (_sourceTextureParameter != null)
{
_sourceTextureParameter.SetValue(source);
}
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
_blurVerticalAndCombinePass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
// Clean up.
renderTargetPool.Recycle(tempTarget0);
renderTargetPool.Recycle(tempTarget1);
if (_sourceTextureParameter != null)
{
_sourceTextureParameter.SetValue((Texture2D)null);
}
_occlusionTextureParameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
//_gBuffer1Parameter.SetValue((Texture2D)null);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
internal override void ProcessJobs(RenderContext context, RenderOrder order)
{
var graphicsDevice = _graphicsService.GraphicsDevice;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
var target = context.RenderTarget;
var viewport = context.Viewport;
Debug.Assert(_shadowMasks.Length > 0);
Debug.Assert(_shadowMasks[0] != null);
RenderTarget2D lowResTarget = null;
if (UseHalfResolution && Numeric.IsGreater(UpsampleDepthSensitivity, 0))
{
// Half-res rendering with upsampling.
var format = new RenderTargetFormat(_shadowMasks[0]);
format.Width /= 2;
format.Height /= 2;
lowResTarget = _graphicsService.RenderTargetPool.Obtain2D(format);
}
int index = 0;
var jobs = Jobs.Array;
int jobCount = Jobs.Count;
int lastShadowMaskIndex = -1;
while (index < jobCount)
{
int shadowMaskIndex = (int)(jobs[index].SortKey >> 16);
var renderer = jobs[index].Renderer;
// Find end of current batch.
int endIndexExclusive = index + 1;
while (endIndexExclusive < jobCount)
{
if ((int)(jobs[endIndexExclusive].SortKey >> 16) != lastShadowMaskIndex
|| jobs[endIndexExclusive].Renderer != renderer)
{
break;
}
endIndexExclusive++;
}
// Restore the render state. (The integrated scene node renderers properly
// restore the render state, but third-party renderers might mess it up.)
if (index > 0)
savedRenderState.Restore();
if (shadowMaskIndex != lastShadowMaskIndex)
{
// Done with current shadow mask. Apply filter.
if (lastShadowMaskIndex >= 0)
PostProcess(context, context.RenderTarget, _shadowMasks[lastShadowMaskIndex]);
// Switch to next shadow mask.
lastShadowMaskIndex = shadowMaskIndex;
var shadowMask = lowResTarget ?? _shadowMasks[shadowMaskIndex];
// Set device render target and clear it to white (= no shadow).
graphicsDevice.SetRenderTarget(shadowMask);
context.RenderTarget = shadowMask;
context.Viewport = graphicsDevice.Viewport;
graphicsDevice.Clear(Color.White);
}
// Submit batch to renderer.
// (Use Accessor to expose current batch as IList<SceneNode>.)
JobsAccessor.Set(Jobs, index, endIndexExclusive);
renderer.Render(JobsAccessor, context, order);
JobsAccessor.Reset();
index = endIndexExclusive;
}
// Done with last shadow mask. Apply filter.
PostProcess(context, context.RenderTarget, _shadowMasks[lastShadowMaskIndex]);
savedRenderState.Restore();
graphicsDevice.ResetTextures();
graphicsDevice.SetRenderTarget(null);
context.RenderTarget = target;
context.Viewport = viewport;
_graphicsService.RenderTargetPool.Recycle(lowResTarget);
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
// Get temporary render targets.
var sourceSize = new Vector2F(source.Width, source.Height);
var isFloatingPointFormat = TextureHelper.IsFloatingPointFormat(source.Format);
var sceneFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
var maskedScene = renderTargetPool.Obtain2D(sceneFormat);
var rayFormat = new RenderTargetFormat(
Math.Max(1, (int)(sourceSize.X / DownsampleFactor)),
Math.Max(1, (int)(sourceSize.Y / DownsampleFactor)),
false,
source.Format,
DepthFormat.None);
var rayImage0 = renderTargetPool.Obtain2D(rayFormat);
var rayImage1 = renderTargetPool.Obtain2D(rayFormat);
// Get view and view-projection transforms.
var cameraNode = context.CameraNode;
Matrix44F projection = cameraNode.Camera.Projection.ToMatrix44F();
Matrix44F view = cameraNode.View;
Matrix44F viewProjection = projection * view;
// We simply place the light source "far away" in opposite light ray direction.
Vector4F lightPositionWorld = new Vector4F(-LightDirection * 10000, 1);
// Convert to clip space.
Vector4F lightPositionProj = viewProjection * lightPositionWorld;
Vector3F lightPositionClip = Vector4F.HomogeneousDivide(lightPositionProj);
// Convert from clip space [-1, 1] to texture space [0, 1].
Vector2 lightPosition = new Vector2(lightPositionClip.X * 0.5f + 0.5f, -lightPositionClip.Y * 0.5f + 0.5f);
// We use dot²(forward, -LightDirection) as a smooth S-shaped attenuation
// curve to reduce the god ray effect when we look orthogonal or away from the sun.
var lightDirectionView = view.TransformDirection(LightDirection);
float z = Math.Max(0, lightDirectionView.Z);
float attenuation = z * z;
// Common effect parameters.
_parameters0Parameter.SetValue(new Vector4(lightPosition.X, lightPosition.Y, LightRadius * LightRadius, Scale));
_parameters1Parameter.SetValue(new Vector2(Softness, graphicsDevice.Viewport.AspectRatio));
_intensityParameter.SetValue((Vector3)Intensity * attenuation);
_numberOfSamplesParameter.SetValue(NumberOfSamples);
_gBuffer0Parameter.SetValue(context.GBuffer0);
// First, create a scene image where occluders are black.
graphicsDevice.SetRenderTarget(maskedScene);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(source);
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp; // G-Buffer 0.
_createMaskPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Downsample image.
context.SourceTexture = maskedScene;
context.RenderTarget = rayImage0;
context.Viewport = new Viewport(0, 0, rayImage0.Width, rayImage0.Height);
_downsampleFilter.Process(context);
// Compute light shafts.
_viewportSizeParameter.SetValue(new Vector2(context.Viewport.Width, context.Viewport.Height));
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
for (int i = 0; i < NumberOfPasses; i++)
{
graphicsDevice.SetRenderTarget(rayImage1);
_sourceTextureParameter.SetValue(rayImage0);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Put the current result in variable rayImage0.
MathHelper.Swap(ref rayImage0, ref rayImage1);
}
// Combine light shaft image with scene.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(source);
_rayTextureParameter.SetValue(rayImage0);
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
_combinePass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
_rayTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(maskedScene);
renderTargetPool.Recycle(rayImage0);
renderTargetPool.Recycle(rayImage1);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, context.SourceTexture.Format, DepthFormat.None);
RenderTarget2D temp0 = renderTargetPool.Obtain2D(tempFormat);
RenderTarget2D temp1 = renderTargetPool.Obtain2D(tempFormat);
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
_numberOfSamplesParameter.SetValue(NumberOfSamples / 2);
for (int i = 0; i < NumberOfPasses; i++)
{
if (i == NumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(temp0);
}
else
{
graphicsDevice.SetRenderTarget(temp1);
}
if (i == 0)
{
_sourceTextureParameter.SetValue(context.SourceTexture);
}
else if (i % 2 == 0)
{
_sourceTextureParameter.SetValue(temp1);
}
else
{
_sourceTextureParameter.SetValue(temp0);
}
_iterationParameter.SetValue(i);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp0);
renderTargetPool.Recycle(temp1);
}
private void Render(RenderContext context)
{
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var graphicsDevice = context.GraphicsService.GraphicsDevice;
if (_updateCubeMap)
{
_updateCubeMap = false;
_cloudMapRenderer.Render(_skyNodes, context);
// Create a camera with 45° FOV for a single cube map face.
var perspectiveProjection = new PerspectiveProjection();
perspectiveProjection.SetFieldOfView(ConstantsF.PiOver2, 1, 1, 100);
context.CameraNode = new CameraNode(new Camera(perspectiveProjection));
var size = _skybox.Texture.Size;
var hdrFormat = new RenderTargetFormat(size, size, false, SurfaceFormat.HdrBlendable, DepthFormat.None);
var hdrTarget = context.GraphicsService.RenderTargetPool.Obtain2D(hdrFormat);
var ldrFormat = new RenderTargetFormat(size, size, false, SurfaceFormat.Color, DepthFormat.None);
var ldrTarget = context.GraphicsService.RenderTargetPool.Obtain2D(ldrFormat);
var spriteBatch = GraphicsService.GetSpriteBatch();
for (int side = 0; side < 6; side++)
{
// Rotate camera to face the current cube map face.
var cubeMapFace = (CubeMapFace)side;
context.CameraNode.View = Matrix44F.CreateLookAt(
new Vector3F(),
GraphicsHelper.GetCubeMapForwardDirection(cubeMapFace),
GraphicsHelper.GetCubeMapUpDirection(cubeMapFace));
// Render sky into HDR render target.
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
context.Viewport = graphicsDevice.Viewport;
graphicsDevice.Clear(Color.Black);
_skyRenderer.Render(_skyNodes, context);
graphicsDevice.BlendState = BlendState.Opaque;
// Convert HDR to RGBM.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Copy RGBM texture into cube map face.
graphicsDevice.SetRenderTarget((RenderTargetCube)_skybox.Texture, cubeMapFace);
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, null, null, null);
spriteBatch.Draw(ldrTarget, new Vector2(0, 0), Color.White);
spriteBatch.End();
}
context.GraphicsService.RenderTargetPool.Recycle(ldrTarget);
context.GraphicsService.RenderTargetPool.Recycle(hdrTarget);
}
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
context.CameraNode = _cameraObject.CameraNode;
var tempFormat = new RenderTargetFormat(originalRenderTarget);
tempFormat.SurfaceFormat = SurfaceFormat.HdrBlendable;
var tempTarget = context.GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
graphicsDevice.SetRenderTarget(tempTarget);
graphicsDevice.Viewport = originalViewport;
context.RenderTarget = tempTarget;
context.Viewport = originalViewport;
_skyRenderer.Render(_skybox, context);
context.SourceTexture = tempTarget;
context.RenderTarget = originalRenderTarget;
_hdrFilter.Process(context);
context.SourceTexture = null;
context.GraphicsService.RenderTargetPool.Recycle(tempTarget);
RenderDebugInfo(context);
context.CameraNode = null;
}
public override void Render(IList <SceneNode> nodes, RenderContext context, RenderOrder order)
{
var graphicsService = context.GraphicsService;
var renderTargetPool = graphicsService.RenderTargetPool;
var graphicsDevice = graphicsService.GraphicsDevice;
// Get a shared RebuildZBufferRenderer which was added by the graphics screen.
var rebuildZBufferRenderer = (RebuildZBufferRenderer)context.Data[RenderContextKeys.RebuildZBufferRenderer];
// We only support a render order of "user defined". This is always the case
// if this renderer is added to a SceneRenderer. The SceneRenderer does the sorting.
Debug.Assert(order == RenderOrder.UserDefined);
// This renderer assumes that the current render target is an off-screen render target.
Debug.Assert(context.RenderTarget != null);
graphicsDevice.ResetTextures();
// Remember the format of the current render target.
var backBufferFormat = new RenderTargetFormat(context.RenderTarget);
// In the loop below we will use the context.SourceTexture property.
// Remember the original source texture.
var originalSourceTexture = context.SourceTexture;
context.SourceTexture = null;
for (int i = 0; i < nodes.Count; i++)
{
var node = (MeshNode)nodes[i];
// Check if the next node wants to sample from the back buffer.
if (RequiresSourceTexture(node, context))
{
// The effect of the node wants to sample from the "SourceTexture".
// Per default, DigitalRune Graphics uses a delegate effect parameter
// binding to set the "SourceTexture" parameters to the
// RenderContext.SourceTexture value. However, this property is usually
// null. We need to manually set RenderContext.SourceTexture to the
// current back buffer render target. Since, we cannot read from this
// render target and write to this render target at the same time,
// we have to copy it.
context.SourceTexture = context.RenderTarget;
// Set a new render target and copy the content of the lastBackBuffer
// and the depth buffer.
context.RenderTarget = renderTargetPool.Obtain2D(backBufferFormat);
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
rebuildZBufferRenderer.Render(context, context.SourceTexture);
}
// Add current node to a temporary list.
_tempList.Add(node);
// Add all following nodes until another node wants to sample from the
// back buffer.
for (int j = i + 1; j < nodes.Count; j++)
{
node = (MeshNode)nodes[j];
if (RequiresSourceTexture(node, context))
{
break;
}
_tempList.Add(node);
i++;
}
// Render nodes.
_meshRenderer.Render(_tempList, context);
renderTargetPool.Recycle(context.SourceTexture);
context.SourceTexture = null;
_tempList.Clear();
}
// Restore original render context.
context.SourceTexture = originalSourceTexture;
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
var tempFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
RenderTarget2D blurredScene = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
context.RenderTarget = blurredScene;
context.Viewport = new Viewport(0, 0, blurredScene.Width, blurredScene.Height);
// Get view-dependent information stored in camera node.
var cameraNode = context.CameraNode;
object dummy;
cameraNode.ViewDependentData.TryGetValue(this, out dummy);
var data = dummy as ViewDependentData;
if (data == null)
{
data = new ViewDependentData(GraphicsService);
cameraNode.ViewDependentData[this] = data;
}
if (data.LastBlurredScene == null)
{
// This is the first frame. Simply remember the current source for the next frame.
_copyFilter.Process(context);
}
else
{
// Create new blurred scene.
graphicsDevice.SetRenderTarget(blurredScene);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_strengthParameter.SetValue(Strength);
_sourceTextureParameter.SetValue(source);
_lastSourceTextureParameter.SetValue(data.LastBlurredScene);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Copy blurredScene to target.
context.SourceTexture = blurredScene;
context.RenderTarget = target;
context.Viewport = viewport;
_copyFilter.Process(context);
// Recycle old blurred scene and store new scene (switch render targets).
GraphicsService.RenderTargetPool.Recycle(data.LastBlurredScene);
data.LastBlurredScene = blurredScene;
_sourceTextureParameter.SetValue((Texture2D)null);
_lastSourceTextureParameter.SetValue((Texture2D)null);
// Restore original context.
context.SourceTexture = source;
}
//--------------------------------------------------------------
public void Render(IList<SceneNode> lights, RenderContext context)
{
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
var target = context.RenderTarget;
var viewport = context.Viewport;
var width = viewport.Width;
var height = viewport.Height;
RenderTarget2D aoRenderTarget = null;
if (_ssaoFilter != null)
{
// Render ambient occlusion info into a render target.
aoRenderTarget = renderTargetPool.Obtain2D(new RenderTargetFormat(
width / _ssaoDownsampleFactor,
height / _ssaoDownsampleFactor,
false,
SurfaceFormat.Color,
DepthFormat.None));
// PostProcessors require that context.SourceTexture is set. But since
// _ssaoFilter.CombineWithSource is set to false, the SourceTexture is not
// used and we can set it to anything except null.
context.SourceTexture = aoRenderTarget;
context.RenderTarget = aoRenderTarget;
context.Viewport = new Viewport(0, 0, aoRenderTarget.Width, aoRenderTarget.Height);
_ssaoFilter.Process(context);
context.SourceTexture = null;
}
// The light buffer consists of two full-screen render targets into which we
// render the accumulated diffuse and specular light intensities.
var lightBufferFormat = new RenderTargetFormat(width, height, false, SurfaceFormat.HdrBlendable, DepthFormat.Depth24Stencil8);
context.LightBuffer0 = renderTargetPool.Obtain2D(lightBufferFormat);
context.LightBuffer1 = renderTargetPool.Obtain2D(lightBufferFormat);
// Set the device render target to the light buffer.
_renderTargetBindings[0] = new RenderTargetBinding(context.LightBuffer0); // Diffuse light accumulation
_renderTargetBindings[1] = new RenderTargetBinding(context.LightBuffer1); // Specular light accumulation
graphicsDevice.SetRenderTargets(_renderTargetBindings);
context.RenderTarget = context.LightBuffer0;
context.Viewport = graphicsDevice.Viewport;
// Clear the light buffer. (The alpha channel is not used. We can set it to anything.)
graphicsDevice.Clear(new Color(0, 0, 0, 255));
// Restore the depth buffer (which XNA destroys in SetRenderTarget).
// (This is only needed if lights can use a clip geometry (LightNode.Clip).)
var rebuildZBufferRenderer = (RebuildZBufferRenderer)context.Data[RenderContextKeys.RebuildZBufferRenderer];
rebuildZBufferRenderer.Render(context, true);
// Render all lights into the light buffers.
LightRenderer.Render(lights, context);
if (aoRenderTarget != null)
{
// Render the ambient occlusion texture using multiplicative blending.
// This will darken the light buffers depending on the ambient occlusion term.
// Note: Theoretically, this should be done after the ambient light renderer
// and before the directional light renderer because AO should not affect
// directional lights. But doing this here has more impact.
context.SourceTexture = aoRenderTarget;
graphicsDevice.BlendState = GraphicsHelper.BlendStateMultiply;
_copyFilter.Process(context);
}
// Clean up.
graphicsService.RenderTargetPool.Recycle(aoRenderTarget);
context.SourceTexture = null;
context.RenderTarget = target;
context.Viewport = viewport;
_renderTargetBindings[0] = new RenderTargetBinding();
_renderTargetBindings[1] = new RenderTargetBinding();
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
/// <summary>
/// Computes the intersection of <see cref="MeshNode"/>s.
/// </summary>
/// <param name="meshNodePairs">
/// A collection of <see cref="MeshNode"/> pairs.The renderer computes the intersection volume
/// of each pair.
/// </param>
/// <param name="color">The diffuse color used for the intersection.</param>
/// <param name="alpha">The opacity of the intersection.</param>
/// <param name="maxConvexity">
/// The maximum convexity of the submeshes. A convex mesh has a convexity of 1. A concave mesh
/// has a convexity greater than 1. Convexity is the number of layers required for depth peeling
/// (= the number of front face layers when looking at the object).
/// </param>
/// <param name="context">The render context.</param>
/// <remarks>
/// <para>
/// This method renders an off-screen image (color and depth) of the intersection volume. This
/// operation destroys the currently set render target and depth/stencil buffer.
/// </para>
/// </remarks>
/// <exception cref="ObjectDisposedException">
/// The <see cref="IntersectionRenderer"/> has already been disposed.
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="meshNodePairs"/> or <see cref="context"/> is
/// <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// The convexity must be greater than 0.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Graphics service is not set.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Wrong graphics device.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Scene is not set.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Camera node needs to be set in render context.
/// </exception>
public void ComputeIntersection(IEnumerable<Pair<MeshNode>> meshNodePairs,
Vector3F color, float alpha, float maxConvexity, RenderContext context)
{
if (_isDisposed)
throw new ObjectDisposedException("IntersectionRenderer has already been disposed.");
if (meshNodePairs == null)
throw new ArgumentNullException("meshNodePairs");
if (maxConvexity < 1)
throw new ArgumentOutOfRangeException("maxConvexity", "The max convexity must be greater than 0.");
if (context == null)
throw new ArgumentNullException("context");
if (context.GraphicsService == null)
throw new GraphicsException("Invalid render context: Graphics service is not set.");
if (_graphicsService != context.GraphicsService)
throw new GraphicsException("Invalid render context: Wrong graphics service.");
if (context.CameraNode == null)
throw new GraphicsException("Camera node needs to be set in render context.");
if (context.Scene == null)
throw new GraphicsException("A scene needs to be set in the render context.");
// Create 2 ordered pairs for each unordered pair.
_pairs.Clear();
foreach (var pair in meshNodePairs)
{
if (pair.First == null || pair.Second == null)
continue;
// Frustum culling.
if (!context.Scene.HaveContact(pair.First, context.CameraNode))
continue;
if (!context.Scene.HaveContact(pair.Second, context.CameraNode))
continue;
_pairs.Add(new Pair<MeshNode, MeshNode>(pair.First, pair.Second));
_pairs.Add(new Pair<MeshNode, MeshNode>(pair.Second, pair.First));
}
var renderTargetPool = _graphicsService.RenderTargetPool;
if (_pairs.Count == 0)
{
renderTargetPool.Recycle(_intersectionImage);
_intersectionImage = null;
return;
}
// Color and alpha are applied in RenderIntersection().
_color = color;
_alpha = alpha;
var graphicsDevice = _graphicsService.GraphicsDevice;
// Save original render states.
var originalBlendState = graphicsDevice.BlendState;
var originalDepthStencilState = graphicsDevice.DepthStencilState;
var originalRasterizerState = graphicsDevice.RasterizerState;
var originalScissorRectangle = graphicsDevice.ScissorRectangle;
// Get offscreen render targets.
var viewport = context.Viewport;
viewport.X = 0;
viewport.Y = 0;
viewport.Width = (int)(viewport.Width / DownsampleFactor);
viewport.Height = (int)(viewport.Height / DownsampleFactor);
var renderTargetFormat = new RenderTargetFormat(viewport.Width, viewport.Height, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
// Try to reuse any existing render targets.
// (Usually they are recycled in RenderIntersection()).
var currentScene = _intersectionImage;
if (currentScene == null || !renderTargetFormat.IsCompatibleWith(currentScene))
{
currentScene.SafeDispose();
currentScene = renderTargetPool.Obtain2D(renderTargetFormat);
}
var lastScene = renderTargetPool.Obtain2D(renderTargetFormat);
// Set shared effect parameters.
var cameraNode = context.CameraNode;
var view = (Matrix)cameraNode.View;
var projection = cameraNode.Camera.Projection;
var near = projection.Near;
var far = projection.Far;
_parameterViewportSize.SetValue(new Vector2(viewport.Width, viewport.Height));
// The DepthEpsilon has to be tuned if depth peeling does not work because
// of numerical problems equality z comparisons.
_parameterCameraParameters.SetValue(new Vector3(near, far - near, 0.0000001f));
_parameterView.SetValue(view);
_parameterProjection.SetValue((Matrix)projection);
var defaultTexture = _graphicsService.GetDefaultTexture2DBlack();
// Handle all pairs.
bool isFirstPass = true;
while (true)
{
// Find a mesh node A and all mesh nodes to which it needs to be clipped.
MeshNode meshNodeA = null;
_partners.Clear();
for (int i = 0; i < _pairs.Count; i++)
{
var pair = _pairs[i];
if (pair.First == null)
continue;
if (meshNodeA == null)
meshNodeA = pair.First;
if (pair.First == meshNodeA)
{
_partners.Add(pair.Second);
// Remove this pair.
_pairs[i] = new Pair<MeshNode, MeshNode>();
}
}
// Abort if we have handled all pairs.
if (meshNodeA == null)
break;
var worldTransformA = (Matrix)(meshNodeA.PoseWorld * Matrix44F.CreateScale(meshNodeA.ScaleWorld));
if (EnableScissorTest)
{
// Scissor rectangle of A.
var scissorA = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, meshNodeA);
// Union of scissor rectangles of partners.
Rectangle partnerRectangle = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, _partners[0]);
for (int i = 1; i < _partners.Count; i++)
{
var a = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, _partners[i]);
partnerRectangle = Rectangle.Union(partnerRectangle, a);
}
// Use intersection of A and partners.
graphicsDevice.ScissorRectangle = Rectangle.Intersect(scissorA, partnerRectangle);
// We store the union of all scissor rectangles for use in RenderIntersection().
if (isFirstPass)
_totalScissorRectangle = graphicsDevice.ScissorRectangle;
else
_totalScissorRectangle = Rectangle.Union(_totalScissorRectangle, graphicsDevice.ScissorRectangle);
}
// Depth peeling of A.
for (int layer = 0; layer < maxConvexity; layer++)
{
// Set and clear render target.
graphicsDevice.SetRenderTarget(currentScene);
graphicsDevice.Clear(new Color(1, 1, 1, 0)); // RGB = "a large depth", A = "empty area"
// Render a depth layer of A.
graphicsDevice.DepthStencilState = DepthStencilStateWriteLess;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullCounterClockwiseScissor : RasterizerState.CullCounterClockwise;
_parameterWorld.SetValue(worldTransformA);
_parameterTexture.SetValue((layer == 0) ? defaultTexture : lastScene);
_passPeel.Apply();
foreach (var submesh in meshNodeA.Mesh.Submeshes)
submesh.Draw();
// Render partners to set stencil.
graphicsDevice.DepthStencilState = DepthStencilStateOnePassStencilFail;
graphicsDevice.BlendState = BlendStateNoWrite;
graphicsDevice.RasterizerState = EnableScissorTest ? CullNoneScissor : RasterizerState.CullNone;
foreach (var partner in _partners)
{
_parameterWorld.SetValue((Matrix)(partner.PoseWorld * Matrix44F.CreateScale(partner.ScaleWorld)));
_passMark.Apply();
foreach (var submesh in partner.Mesh.Submeshes)
submesh.Draw();
}
// Clear depth buffer. Leave stencil buffer unchanged.
graphicsDevice.Clear(ClearOptions.DepthBuffer, new Color(0, 1, 0), 1, 0);
// Render A to compute lighting.
graphicsDevice.DepthStencilState = DepthStencilStateStencilNotEqual0;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullCounterClockwiseScissor : RasterizerState.CullCounterClockwise;
_parameterWorld.SetValue(worldTransformA);
_passDraw.Apply();
foreach (var submesh in meshNodeA.Mesh.Submeshes)
submesh.Draw();
// Combine last intersection image with current.
if (!isFirstPass)
{
graphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullNoneScissor : RasterizerState.CullNone;
_parameterTexture.SetValue(lastScene);
_passCombine.Apply();
graphicsDevice.DrawFullScreenQuad();
}
isFirstPass = false;
// ----- Swap render targets.
MathHelper.Swap(ref lastScene, ref currentScene);
}
}
// Store final images for RenderIntersection.
_intersectionImage = lastScene;
// Scale scissor rectangle back to full-screen resolution.
if (DownsampleFactor > 1)
{
_totalScissorRectangle.X = (int)(_totalScissorRectangle.X * DownsampleFactor);
_totalScissorRectangle.Y = (int)(_totalScissorRectangle.Y * DownsampleFactor);
_totalScissorRectangle.Width = (int)(_totalScissorRectangle.Width * DownsampleFactor);
_totalScissorRectangle.Height = (int)(_totalScissorRectangle.Height * DownsampleFactor);
}
// Restore original render state.
graphicsDevice.BlendState = originalBlendState ?? BlendState.Opaque;
graphicsDevice.DepthStencilState = originalDepthStencilState ?? DepthStencilState.Default;
graphicsDevice.RasterizerState = originalRasterizerState ?? RasterizerState.CullCounterClockwise;
graphicsDevice.ScissorRectangle = originalScissorRectangle;
renderTargetPool.Recycle(currentScene);
_partners.Clear();
_pairs.Clear();
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
// We use two temporary render targets.
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, context.SourceTexture.Format, DepthFormat.None);
RenderTarget2D temp0 = (NumberOfPasses > 1)
? renderTargetPool.Obtain2D(tempFormat)
: null;
RenderTarget2D temp1 = (NumberOfPasses > 2)
? renderTargetPool.Obtain2D(tempFormat)
: null;
bool useHalfPixelOffset = !TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format);
if (useHalfPixelOffset)
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
_useHalfPixelOffsetParameter.SetValue(1.0f);
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
_useHalfPixelOffsetParameter.SetValue(0.0f);
}
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
for (int i = 0; i < NumberOfPasses; i++)
{
if (i == NumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(temp0);
}
else
{
graphicsDevice.SetRenderTarget(temp1);
}
if (i == 0)
_sourceTextureParameter.SetValue(context.SourceTexture);
else if (i % 2 == 0)
_sourceTextureParameter.SetValue(temp1);
else
_sourceTextureParameter.SetValue(temp0);
// The iteration value goes from 0 ... (n - 1) or 1 ... n depending on
// whether a half-pixel offset is used.
_iterationParameter.SetValue((float)(useHalfPixelOffset ? i : i + 1));
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp0);
renderTargetPool.Recycle(temp1);
}
public override void Render(IList<SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
throw new ArgumentNullException("nodes");
if (context == null)
throw new ArgumentNullException("context");
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
return;
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
int frame = context.Frame;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalCameraNode = context.CameraNode;
var originalLodCameraNode = context.LodCameraNode;
var originalReferenceNode = context.ReferenceNode;
try
{
// Use foreach instead of for-loop to catch InvalidOperationExceptions in
// case the collection is modified.
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i] as SceneCaptureNode;
if (node == null)
continue;
// Update each node only once per frame.
if (node.LastFrame == frame)
continue;
node.LastFrame = frame;
var cameraNode = node.CameraNode;
if (cameraNode == null)
continue;
var texture = node.RenderToTexture.Texture;
if (texture == null)
continue;
// RenderToTexture instances can be shared. --> Update them only once per frame.
if (node.RenderToTexture.LastFrame == frame)
continue;
context.CameraNode = cameraNode;
context.LodCameraNode = cameraNode;
context.ReferenceNode = node;
var renderTarget2D = texture as RenderTarget2D;
var projection = cameraNode.Camera.Projection;
if (renderTarget2D != null)
{
context.RenderTarget = renderTarget2D;
context.Viewport = new Viewport(0, 0, renderTarget2D.Width, renderTarget2D.Height);
RenderCallback(context);
// Update other properties of RenderToTexture.
node.RenderToTexture.LastFrame = frame;
node.RenderToTexture.TextureMatrix = GraphicsHelper.ProjectorBiasMatrix
* projection
* cameraNode.PoseWorld.Inverse;
continue;
}
var renderTargetCube = texture as RenderTargetCube;
if (renderTargetCube != null)
{
var format = new RenderTargetFormat(renderTargetCube) { Mipmap = false };
renderTarget2D = renderTargetPool.Obtain2D(format);
context.RenderTarget = renderTarget2D;
context.Viewport = new Viewport(0, 0, renderTarget2D.Width, renderTarget2D.Height);
if (_spriteBatch == null)
_spriteBatch = graphicsService.GetSpriteBatch();
var perspectiveProjection = projection as PerspectiveProjection;
if (perspectiveProjection == null)
throw new GraphicsException("The camera of the SceneCaptureNode must use a perspective projection.");
// ReSharper disable CompareOfFloatsByEqualityOperator
if (perspectiveProjection.FieldOfViewX != ConstantsF.PiOver2
|| perspectiveProjection.FieldOfViewY != ConstantsF.PiOver2)
perspectiveProjection.SetFieldOfView(ConstantsF.PiOver2, 1, projection.Near, projection.Far);
// ReSharper restore CompareOfFloatsByEqualityOperator
var originalCameraPose = cameraNode.PoseWorld;
for (int side = 0; side < 6; side++)
{
// Rotate camera to face the current cube map face.
//var cubeMapFace = (CubeMapFace)side;
// AMD problem: If we generate in normal order, the last cube map face contains
// garbage when mipmaps are created.
var cubeMapFace = (CubeMapFace)(5 - side);
var position = cameraNode.PoseWorld.Position;
cameraNode.View = Matrix44F.CreateLookAt(
position,
position + originalCameraPose.ToWorldDirection(GraphicsHelper.GetCubeMapForwardDirection(cubeMapFace)),
originalCameraPose.ToWorldDirection(GraphicsHelper.GetCubeMapUpDirection(cubeMapFace)));
RenderCallback(context);
// Copy RGBM texture into cube map face.
graphicsDevice.SetRenderTarget(renderTargetCube, cubeMapFace);
_spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, null, null, null);
_spriteBatch.Draw(renderTarget2D, new Vector2(0, 0), Color.White);
_spriteBatch.End();
}
cameraNode.PoseWorld = originalCameraPose;
renderTargetPool.Recycle(renderTarget2D);
// Update other properties of RenderToTexture.
node.RenderToTexture.LastFrame = frame;
node.RenderToTexture.TextureMatrix = GraphicsHelper.ProjectorBiasMatrix
* projection
* cameraNode.PoseWorld.Inverse;
continue;
}
throw new GraphicsException(
"SceneCaptureNode.RenderToTexture.Texture is invalid. The texture must be a RenderTarget2D or RenderTargetCube.");
}
}
catch (InvalidOperationException exception)
{
throw new GraphicsException(
"InvalidOperationException was raised in SceneCaptureRenderer.Render(). "
+ "This can happen if a SceneQuery instance that is currently in use is modified in the "
+ "RenderCallback. --> Use different SceneQuery types in the method which calls "
+ "SceneCaptureRenderer.Render() and in the RenderCallback method.",
exception);
}
graphicsDevice.SetRenderTarget(null);
savedRenderState.Restore();
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.CameraNode = originalCameraNode;
context.LodCameraNode = originalLodCameraNode;
context.ReferenceNode = originalReferenceNode;
}
// Perform FFTs.
// 4 complex input images: source0.xy, source0.zw, source1.xy, source1.zw
// 2 targets: target0 = displacement map, target1 = normal map using Color format.
public void Process(RenderContext context, bool forward, Texture2D source0, Texture2D source1, RenderTarget2D target0, RenderTarget2D target1, float choppiness)
{
if (context == null)
throw new ArgumentNullException("context");
if (source0 == null)
throw new ArgumentNullException("source0");
if (source1 == null)
throw new ArgumentNullException("source1");
if (forward)
{
// For forward FFT, uncomment the LastPassScale stuff!
throw new NotImplementedException("Forward FFT not implemented.");
}
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = RasterizerState.CullNone;
graphicsDevice.DepthStencilState = DepthStencilState.None;
int size = source0.Width;
_parameterSize.SetValue((float)size);
_parameterChoppiness.SetValue(choppiness);
int numberOfButterflyPasses = (int)MathHelper.Log2GreaterOrEqual((uint)source0.Width);
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
_parameterButterflyTexture.SetValue(GetButterflyTexture(forward, numberOfButterflyPasses));
var format = new RenderTargetFormat(size, size, false, source0.Format, DepthFormat.None);
var tempPing0 = renderTargetPool.Obtain2D(format);
var tempPing1 = renderTargetPool.Obtain2D(format);
var tempPong0 = renderTargetPool.Obtain2D(format);
var tempPong1 = renderTargetPool.Obtain2D(format);
//_parameterIsLastPass.SetValue(false);
// Perform horizontal and vertical FFT pass.
for (int i = 0; i < 2; i++)
{
//_parameterLastPassScale.SetValue(1);
// Perform butterfly passes. We ping-pong between two temp targets.
for (int pass = 0; pass < numberOfButterflyPasses; pass++)
{
_parameterButterflyIndex.SetValue(0.5f / numberOfButterflyPasses + (float)pass / numberOfButterflyPasses);
if (i == 0 && pass == 0)
{
// First pass.
_renderTargetBindings[0] = new RenderTargetBinding(tempPing0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPing1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(source0);
_parameterSourceTexture1.SetValue(source1);
}
else if (i == 1 && pass == numberOfButterflyPasses - 1)
{
// Last pass.
// We have explicit shader passes for the last FFT pass.
break;
//_parameterIsLastPass.SetValue(true);
//if (forward)
// _parameterLastPassScale.SetValue(1.0f / size / size);
//if (_renderTargetBindings[0].RenderTarget == tempPing0)
//{
// _renderTargetBindings[0] = new RenderTargetBinding(target0);
// _renderTargetBindings[1] = new RenderTargetBinding(target1);
// graphicsDevice.SetRenderTargets(_renderTargetBindings);
// _parameterSourceTexture0.SetValue(tempPing0);
// _parameterSourceTexture1.SetValue(tempPing1);
//}
//else
//{
// _renderTargetBindings[0] = new RenderTargetBinding(target0);
// _renderTargetBindings[1] = new RenderTargetBinding(target1);
// graphicsDevice.SetRenderTargets(_renderTargetBindings);
// _parameterSourceTexture0.SetValue(tempPong0);
// _parameterSourceTexture1.SetValue(tempPong1);
//}
}
else
{
// Intermediate pass.
if (_renderTargetBindings[0].RenderTarget == tempPing0)
{
_renderTargetBindings[0] = new RenderTargetBinding(tempPong0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPong1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(tempPing0);
_parameterSourceTexture1.SetValue(tempPing1);
}
else
{
_renderTargetBindings[0] = new RenderTargetBinding(tempPing0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPing1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(tempPong0);
_parameterSourceTexture1.SetValue(tempPong1);
}
}
if (i == 0)
_passFftHorizontal.Apply();
else
_passFftVertical.Apply();
graphicsDevice.DrawFullScreenQuad();
}
}
// Perform final vertical FFT passes. We have to perform them separately
// because displacement map and normal map usually have different bit depth.
// Final pass for displacement.
graphicsDevice.SetRenderTarget(target0);
if (_renderTargetBindings[1].RenderTarget == tempPing1)
_parameterSourceTexture0.SetValue(tempPing0);
else
_parameterSourceTexture0.SetValue(tempPong0);
_passFftDisplacement.Apply();
graphicsDevice.DrawFullScreenQuad();
// Final pass for normals.
graphicsDevice.SetRenderTarget(target1);
if (_renderTargetBindings[1].RenderTarget == tempPing1)
_parameterSourceTexture0.SetValue(tempPing1);
else
_parameterSourceTexture0.SetValue(tempPong1);
_passFftNormal.Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean up.
_renderTargetBindings[0] = default(RenderTargetBinding);
_renderTargetBindings[1] = default(RenderTargetBinding);
_parameterButterflyTexture.SetValue((Texture2D)null);
_parameterSourceTexture0.SetValue((Texture2D)null);
_parameterSourceTexture1.SetValue((Texture2D)null);
renderTargetPool.Recycle(tempPing0);
renderTargetPool.Recycle(tempPing1);
renderTargetPool.Recycle(tempPong0);
renderTargetPool.Recycle(tempPong1);
savedRenderState.Restore();
// Reset the texture stages. If a floating point texture is set, we get exceptions
// when a sampler with bilinear filtering is set.
#if !MONOGAME
graphicsDevice.ResetTextures();
#endif
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var cameraNode = context.CameraNode;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
var sourceSize = new Vector2F(source.Width, source.Height);
int width = (int)sourceSize.X;
int height = (int)sourceSize.Y;
int downsampledWidth = Math.Max(1, width / DownsampleFactor);
int downsampledHeight = Math.Max(1, height / DownsampleFactor);
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
InitializeGaussianBlur(new Vector2F(downsampledWidth, downsampledHeight), false);
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
InitializeGaussianBlur(new Vector2F(downsampledWidth, downsampledHeight), true);
}
// Get temporary render targets.
var downsampleFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, source.Format, DepthFormat.None);
RenderTarget2D blurredScene0 = renderTargetPool.Obtain2D(downsampleFormat);
RenderTarget2D blurredScene1 = renderTargetPool.Obtain2D(downsampleFormat);
var blurredDepthFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, context.GBuffer0.Format, DepthFormat.None);
RenderTarget2D blurredDepth0 = renderTargetPool.Obtain2D(blurredDepthFormat);
var cocFormat = new RenderTargetFormat(width, height, false, SurfaceFormat.Single, DepthFormat.None);
RenderTarget2D cocImage = renderTargetPool.Obtain2D(cocFormat);
var downSampledCocFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, cocFormat.SurfaceFormat, DepthFormat.None);
RenderTarget2D cocImageBlurred = renderTargetPool.Obtain2D(downSampledCocFormat);
// ----- Create CoC map.
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(cocImage);
_screenSizeParameter.SetValue(new Vector2(cocImage.Width, cocImage.Height));
_depthTextureParameter.SetValue(context.GBuffer0);
_nearBlurDistanceParameter.SetValue(NearBlurDistance);
_nearFocusDistanceParameter.SetValue(NearFocusDistance);
_farFocusDistanceParameter.SetValue(FarFocusDistance);
_farBlurDistanceParameter.SetValue(FarBlurDistance);
_farParameter.SetValue(cameraNode.Camera.Projection.Far);
_circleOfConfusionPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Downsample cocImage to cocImageBlurred.
context.SourceTexture = cocImage;
context.RenderTarget = cocImageBlurred;
context.Viewport = new Viewport(0, 0, cocImageBlurred.Width, cocImageBlurred.Height);
_downsampleFilter.Process(context);
renderTargetPool.Recycle(cocImage);
// ----- Downsample source to blurredScene0.
context.SourceTexture = source;
context.RenderTarget = blurredScene0;
context.Viewport = new Viewport(0, 0, blurredScene0.Width, blurredScene0.Height);
_downsampleFilter.Process(context);
// ----- Downsample depth texture to blurredDepth0.
context.SourceTexture = context.GBuffer0;
context.RenderTarget = blurredDepth0;
context.Viewport = new Viewport(0, 0, blurredDepth0.Width, blurredDepth0.Height);
_downsampleFilter.Process(context);
// ----- Blur scene.
// Horizontal blur
graphicsDevice.SetRenderTarget(blurredScene1);
_screenSizeParameter.SetValue(new Vector2(blurredScene0.Width, blurredScene0.Height));
_blurTextureParameter.SetValue(blurredScene0);
_downsampledDepthTextureParameter.SetValue(blurredDepth0);
_downsampledCocTextureParameter.SetValue(cocImageBlurred);
_offsetsParameter.SetValue(_horizontalOffsets);
_weightsParameter.SetValue(_weights);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Vertical blur.
graphicsDevice.SetRenderTarget(blurredScene0);
_blurTextureParameter.SetValue(blurredScene1);
_offsetsParameter.SetValue(_verticalOffsets);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(blurredScene1);
// ----- Blur cocImageBlurred.
context.SourceTexture = cocImageBlurred;
context.RenderTarget = cocImageBlurred;
context.Viewport = new Viewport(0, 0, cocImageBlurred.Width, cocImageBlurred.Height);
_cocBlur.Process(context); // We make a two pass blur, so context.SourceTexture can be equal to context.RenderTarget.
// ----- Blur depth.
context.SourceTexture = blurredDepth0;
context.RenderTarget = blurredDepth0;
context.Viewport = new Viewport(0, 0, blurredDepth0.Width, blurredDepth0.Height);
_cocBlur.Process(context);
// ----- Create final DoF image.
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_screenSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sceneTextureParameter.SetValue(source);
_blurTextureParameter.SetValue(blurredScene0);
_depthTextureParameter.SetValue(context.GBuffer0);
_downsampledDepthTextureParameter.SetValue(blurredDepth0);
_downsampledCocTextureParameter.SetValue(cocImageBlurred);
_depthOfFieldPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Clean-up
_depthTextureParameter.SetValue((Texture2D)null);
_blurTextureParameter.SetValue((Texture2D)null);
_downsampledDepthTextureParameter.SetValue((Texture2D)null);
_downsampledCocTextureParameter.SetValue((Texture2D)null);
_sceneTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(blurredScene0);
renderTargetPool.Recycle(blurredDepth0);
renderTargetPool.Recycle(cocImageBlurred);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
public override void Render(IList <SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
{
throw new ArgumentNullException("nodes");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
{
return;
}
Debug.Assert(context.CameraNode != null, "A camera node has to be set in the render context.");
Debug.Assert(context.Scene != null, "A scene has to be set in the render context.");
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalReferenceNode = context.ReferenceNode;
// Camera properties
var cameraNode = context.CameraNode;
var cameraPose = cameraNode.PoseWorld;
var projection = cameraNode.Camera.Projection;
if (!(projection is PerspectiveProjection))
{
throw new NotImplementedException("VSM shadow maps not yet implemented for scenes with perspective camera.");
}
float fieldOfViewY = projection.FieldOfViewY;
float aspectRatio = projection.AspectRatio;
// Update SceneNode.LastFrame for all rendered nodes.
int frame = context.Frame;
cameraNode.LastFrame = frame;
// The scene node renderer should use the light camera instead of the player camera.
context.CameraNode = _orthographicCameraNode;
// The shadow map is rendered using the technique "DirectionalVsm".
// See ShadowMap.fx in the DigitalRune source code folder.
context.Technique = "DirectionalVsm";
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var originalBlendState = graphicsDevice.BlendState;
var originalDepthStencilState = graphicsDevice.DepthStencilState;
var originalRasterizerState = graphicsDevice.RasterizerState;
for (int i = 0; i < numberOfNodes; i++)
{
var lightNode = nodes[i] as LightNode;
if (lightNode == null)
{
continue;
}
var shadow = lightNode.Shadow as VarianceShadow;
if (shadow == null)
{
continue;
}
// LightNode is visible in current frame.
lightNode.LastFrame = frame;
// The format of the shadow map:
var format = new RenderTargetFormat(
shadow.PreferredSize,
shadow.PreferredSize,
false,
shadow.Prefer16Bit ? SurfaceFormat.HalfVector2 : SurfaceFormat.Vector2, // VSM needs two channels!
DepthFormat.Depth24);
if (shadow.ShadowMap != null && shadow.IsLocked)
{
continue;
}
if (shadow.ShadowMap == null)
{
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(format);
}
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.BlendState = BlendState.Opaque;
// Render front and back faces for VSM due to low shadow map texel density.
// (VSM is usually used for distant geometry.)
graphicsDevice.RasterizerState = RasterizerState.CullNone;
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
context.RenderTarget = shadow.ShadowMap;
context.Viewport = graphicsDevice.Viewport;
graphicsDevice.Clear(Color.White);
// Compute an orthographic camera for the light.
// If Shadow.TargetArea is null, the shadow map should cover the area in front of the player camera.
// If Shadow.TargetArea is set, the shadow map should cover this static area.
if (shadow.TargetArea == null)
{
// near/far of this shadowed area.
float near = projection.Near;
float far = shadow.MaxDistance;
// Abort if near-far distances are invalid.
if (Numeric.IsGreaterOrEqual(near, far))
{
continue;
}
// Create a view volume for frustum part that is covered by the shadow map.
_cameraVolume.SetFieldOfView(fieldOfViewY, aspectRatio, near, far);
// Find the bounding sphere of the frustum part.
Vector3 center;
float radius;
GetBoundingSphere(_cameraVolume, out center, out radius);
// Convert center to light space.
Pose lightPose = lightNode.PoseWorld;
center = cameraPose.ToWorldPosition(center);
center = lightPose.ToLocalPosition(center);
// Snap center to texel positions to avoid shadow swimming.
SnapPositionToTexels(ref center, 2 * radius, shadow.ShadowMap.Height);
// Convert center back to world space.
center = lightPose.ToWorldPosition(center);
Matrix orientation = lightPose.Orientation;
Vector3 backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the target bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3 cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjection = (Matrix)view * orthographicProjection;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the camera frustum.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
}
else
{
// Get bounding sphere of static target area.
Aabb targetAabb = shadow.TargetArea.Value;
Vector3 center = targetAabb.Center;
float radius = (targetAabb.Maximum - center).Length;
// Convert center to light space.
Matrix orientation = lightNode.PoseWorld.Orientation;
Vector3 backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the target bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3 cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjection = (Matrix)view * orthographicProjection;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the camera frustum.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
}
context.ReferenceNode = lightNode;
context.Object = shadow;
// Render objects into shadow map.
bool shadowMapContainsSomething = RenderCallback(context);
if (shadowMapContainsSomething)
{
// Blur shadow map.
if (shadow.Filter != null && shadow.Filter.Scale > 0)
{
context.SourceTexture = shadow.ShadowMap;
shadow.Filter.Process(context);
context.SourceTexture = null;
}
}
else
{
// Shadow map is empty. Recycle it.
graphicsService.RenderTargetPool.Recycle(shadow.ShadowMap);
shadow.ShadowMap = null;
}
}
graphicsDevice.SetRenderTarget(null);
graphicsDevice.BlendState = originalBlendState;
graphicsDevice.DepthStencilState = originalDepthStencilState;
graphicsDevice.RasterizerState = originalRasterizerState;
context.CameraNode = cameraNode;
context.Technique = null;
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.ReferenceNode = originalReferenceNode;
context.Object = null;
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var cameraNode = context.CameraNode;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
Projection projection = cameraNode.Camera.Projection;
Matrix44F projMatrix = projection;
float near = projection.Near;
float far = projection.Far;
_frustumInfoParameter.SetValue(new Vector4(
projection.Left / near,
projection.Top / near,
(projection.Right - projection.Left) / near,
(projection.Bottom - projection.Top) / near));
_numberOfAOSamplesParameter.SetValue(NumberOfSamples);
// The height of a 1 unit object 1 unit in front of the camera.
// (Compute 0.5 unit multiply by 2 and divide by 2 to convert from [-1, 1] to [0, 1] range.)
float projectionScale =
projMatrix.TransformPosition(new Vector3F(0, 0.5f, -1)).Y
- projMatrix.TransformPosition(new Vector3F(0, 0, -1)).Y;
_aoParameters0.SetValue(new Vector4(
projectionScale,
Radius,
Strength / (float)Math.Pow(Radius, 6),
Bias));
_aoParameters1.SetValue(new Vector4(
viewport.Width,
viewport.Height,
far,
MaxOcclusion));
_aoParameters2.SetValue(new Vector4(
SampleDistribution,
1.0f / (EdgeSoftness + 0.001f) * far,
BlurScale,
MinBias));
context.ThrowIfGBuffer0Missing();
_gBuffer0Parameter.SetValue(context.GBuffer0);
//var view = cameraNode.View;
//_viewParameter.SetValue((Matrix)view);
//_gBuffer1Parameter.SetValue(context.GBuffer1);
// We use two temporary render targets.
var format = new RenderTargetFormat(
context.Viewport.Width,
context.Viewport.Height,
false,
SurfaceFormat.Color,
DepthFormat.None);
var tempTarget0 = renderTargetPool.Obtain2D(format);
var tempTarget1 = renderTargetPool.Obtain2D(format);
// Create SSAO.
graphicsDevice.SetRenderTarget(tempTarget0);
_createAOPass.Apply();
graphicsDevice.Clear(new Color(1.0f, 1.0f, 1.0f, 1.0f));
graphicsDevice.DrawFullScreenQuad();
// Horizontal blur.
graphicsDevice.SetRenderTarget(tempTarget1);
_occlusionTextureParameter.SetValue(tempTarget0);
_blurHorizontalPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Vertical blur
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_occlusionTextureParameter.SetValue(tempTarget1);
if (!CombineWithSource)
{
_blurVerticalPass.Apply();
}
else
{
if (_sourceTextureParameter != null)
_sourceTextureParameter.SetValue(source);
if (TextureHelper.IsFloatingPointFormat(source.Format))
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
_blurVerticalAndCombinePass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
// Clean up.
renderTargetPool.Recycle(tempTarget0);
renderTargetPool.Recycle(tempTarget1);
if (_sourceTextureParameter != null)
_sourceTextureParameter.SetValue((Texture2D)null);
_occlusionTextureParameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
//_gBuffer1Parameter.SetValue((Texture2D)null);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
protected override void OnRender(RenderContext context)
{
if (ActiveCameraNode == null)
{
return;
}
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
context.LodCameraNode = ActiveCameraNode;
// Copy all scene nodes into a list.
CopyNodesToList(Scene, _sceneNodes);
// ----- Occlusion Culling
// Usually, we would make a scene query to get all scene nodes within the
// viewing frustum. But in this example we will use the new OcclusionBuffer.
if (EnableCulling)
{
// Render all occluders into the occlusion buffer.
// - "_sceneNodes" is a list of all scene nodes. The OcclusionBuffer will
// go through the list and render all occluders.
// - "LightNode" is the main directional light that casts a cascaded shadow.
// Passing the light node to the OcclusionBuffer activates shadow caster
// culling.
// - A custom scene node renderer can be passed to the OcclusionBuffer. In
// this example, the ground mesh "Gravel/Gravel.fbx" has a material with an
// "Occluder" render pass. When we pass the "MeshRenderer" to the OcclusionBuffer
// the ground mesh will be rendered directly into the occlusion buffer.
Profiler.Start("Occlusion.Render");
context.RenderPass = "******";
OcclusionBuffer.Render(_sceneNodes, LightNode, MeshRenderer, context);
context.RenderPass = null;
Profiler.Stop("Occlusion.Render");
// Perform occlusion culling on the specified list of scene nodes.
// - The scene nodes will be tested against the occluders. If a scene node
// is hidden, it will be replaced with a null entry in the list.
// - When shadow caster culling is active, shadow casting scene nodes will
// also be tested against the occluders. If the shadow is not visible,
// the shadow caster will internally be marked as occluded. The ShadowMapRenderer
// will automatically skip occluded scene nodes.
Profiler.Start("Occlusion.Query");
OcclusionBuffer.Query(_sceneNodes, context);
Profiler.Stop("Occlusion.Query");
}
// The base DeferredGraphicsScreen expects a CustomSceneQuery.
// --> Copy the occlusion culling results to a CustomSceneQuery.
_sceneQuery.Set(ActiveCameraNode, _sceneNodes, context);
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
RenderTarget2D topDownRenderTarget = null;
const int topDownViewSize = 384;
if (ShowTopDownView)
{
// Render top-down scene into an offscreen render target.
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = topDownViewSize,
Height = topDownViewSize,
};
topDownRenderTarget = renderTargetPool.Obtain2D(format);
context.Scene = Scene;
context.CameraNode = _topDownCameraNode;
context.Viewport = new Viewport(0, 0, topDownViewSize, topDownViewSize);
context.RenderTarget = topDownRenderTarget;
RenderScene(_sceneQuery, context, true, false, false, false);
_debugRenderer.Clear();
_debugRenderer.DrawObject(ActiveCameraNode, Color.Red, true, true);
_debugRenderer.Render(context);
context.RenderTarget = originalRenderTarget;
context.Viewport = fullViewport;
}
// Render regular 3D scene.
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
RenderScene(_sceneQuery, context, true, false, true, false);
// Render debug visualization on top of scene.
bool renderObject = false;
switch (DebugVisualization)
{
case DebugVisualization.CameraHzb:
OcclusionBuffer.VisualizeCameraBuffer(DebugLevel, context);
break;
case DebugVisualization.LightHzb:
OcclusionBuffer.VisualizeLightBuffer(DebugLevel, context);
break;
case DebugVisualization.Object:
OcclusionBuffer.VisualizeObject(DebugObject, context);
renderObject = true;
break;
case DebugVisualization.ShadowCaster:
OcclusionBuffer.VisualizeShadowCaster(DebugObject, context);
break;
case DebugVisualization.ShadowVolume:
OcclusionBuffer.VisualizeShadowVolume(DebugObject, context);
renderObject = true;
break;
}
if (renderObject)
{
_debugRenderer.Clear();
_debugRenderer.DrawObject(DebugObject, Color.Yellow, true, true);
_debugRenderer.Render(context);
}
if (ShowTopDownView)
{
// Copy offscreen buffer to screen.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(
topDownRenderTarget,
new Rectangle(fullViewport.Width - topDownViewSize, fullViewport.Height - topDownViewSize, topDownViewSize, topDownViewSize),
Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(topDownRenderTarget);
}
// Clean-up
_sceneNodes.Clear();
_sceneQuery.Reset();
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
}
private int AssignShadowMask(LightNode lightNode, RenderContext context)
{
// Each shadow mask has 4 8-bit channels. We must assign a shadow mask channel to
// each shadow-casting light. Non-overlapping lights can use the same channel.
// Overlapping lights must use different channels. If we run out of channels,
// we remove some lights from the list.
var scene = context.Scene;
var viewport = context.Viewport;
int maskWidth = viewport.Width;
int maskHeight = viewport.Height;
if (UseHalfResolution && Numeric.IsLessOrEqual(UpsampleDepthSensitivity, 0))
{
// Half-res rendering with no upsampling.
maskWidth /= 2;
maskHeight /= 2;
}
// Loop over all bins until we find one which can be used for this light node.
int binIndex;
for (binIndex = 0; binIndex < _shadowMaskBins.Length; binIndex++)
{
var bin = _shadowMaskBins[binIndex];
// Check if the light node touches any other light nodes in this bin.
bool hasContact = false;
foreach (var otherLightNode in bin)
{
if (scene.HaveContact(lightNode, otherLightNode))
{
hasContact = true;
break;
}
}
// No overlap. Use this bin.
if (!hasContact)
{
bin.Add(lightNode);
break;
}
}
if (binIndex >= _shadowMaskBins.Length)
{
return(-1); // Light node does not fit into any bin.
}
int shadowMaskIndex = binIndex / 4;
if (_shadowMasks[shadowMaskIndex] == null)
{
// Create shadow mask.
var shadowMaskFormat = new RenderTargetFormat(maskWidth, maskHeight, false, SurfaceFormat.Color, DepthFormat.None);
_shadowMasks[shadowMaskIndex] = context.GraphicsService.RenderTargetPool.Obtain2D(shadowMaskFormat);
}
// Assign shadow mask to light node.
lightNode.Shadow.ShadowMask = _shadowMasks[shadowMaskIndex];
lightNode.Shadow.ShadowMaskChannel = binIndex % 4;
return(shadowMaskIndex);
}
protected override void OnRender(RenderContext context)
{
if (ActiveCameraNode == null)
return;
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
// Get a render target for the first camera. Use half the width and height.
int halfWidth = fullViewport.Width / 2;
int halfHeight = fullViewport.Height / 2;
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = halfWidth,
Height = halfHeight
};
var renderTarget0 = renderTargetPool.Obtain2D(format);
var renderTarget1 = renderTargetPool.Obtain2D(format);
var renderTarget2 = renderTargetPool.Obtain2D(format);
var viewport0 = new Viewport(0, 0, halfWidth, halfHeight);
var viewport1 = new Viewport(halfWidth, 0, halfWidth, halfHeight);
var viewport2 = new Viewport(0, halfHeight, halfWidth, halfHeight);
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
context.LodCameraNode = context.CameraNode;
context.LodHysteresis = 0.5f;
// Reduce detail level by increasing the LOD bias.
context.LodBias = 2.0f;
for (int i = 0; i < 4; i++)
{
if (i == 0)
{
// TOP, LEFT
context.RenderTarget = renderTarget0;
context.Viewport = new Viewport(0, 0, viewport0.Width, viewport0.Height);
context.LodBlendingEnabled = false;
}
else if (i == 1)
{
// TOP, RIGHT
context.RenderTarget = renderTarget1;
context.Viewport = new Viewport(0, 0, viewport1.Width, viewport1.Height);
context.LodBlendingEnabled = true;
}
else if (i == 2)
{
// BOTTOM, LEFT
context.RenderTarget = renderTarget2;
context.Viewport = new Viewport(0, 0, viewport2.Width, viewport2.Height);
context.LodBlendingEnabled = false;
}
else
{
// BOTTOM, RIGHT
context.RenderTarget = originalRenderTarget;
context.Viewport = new Viewport(fullViewport.X + halfWidth, fullViewport.Y + halfHeight, halfWidth, halfHeight);
context.LodBlendingEnabled = true;
}
var sceneQuery = Scene.Query<SceneQueryWithLodBlending>(context.CameraNode, context);
if (i == 0 || i == 1)
{
// TOP
for (int j = 0; j < sceneQuery.RenderableNodes.Count; j++)
if (sceneQuery.RenderableNodes[j].UserFlags == 1)
sceneQuery.RenderableNodes[j] = null;
}
else
{
// BOTTOM
for (int j = 0; j < sceneQuery.RenderableNodes.Count; j++)
if (sceneQuery.RenderableNodes[j].UserFlags == 2)
sceneQuery.RenderableNodes[j] = null;
}
RenderScene(sceneQuery, context, true, true, true, true);
sceneQuery.Reset();
}
// ----- Copy screens.
// Copy the previous screens from the temporary render targets into the back buffer.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(renderTarget0, viewport0.Bounds, Color.White);
SpriteBatch.Draw(renderTarget1, viewport1.Bounds, Color.White);
SpriteBatch.Draw(renderTarget2, viewport2.Bounds, Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(renderTarget0);
renderTargetPool.Recycle(renderTarget1);
renderTargetPool.Recycle(renderTarget2);
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
context.RenderPass = null;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, context.SourceTexture.Format, DepthFormat.None);
RenderTarget2D temp0 = renderTargetPool.Obtain2D(tempFormat);
RenderTarget2D temp1 = renderTargetPool.Obtain2D(tempFormat);
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
_numberOfSamplesParameter.SetValue(NumberOfSamples / 2);
for (int i = 0; i < NumberOfPasses; i++)
{
if (i == NumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(temp0);
}
else
{
graphicsDevice.SetRenderTarget(temp1);
}
if (i == 0)
_sourceTextureParameter.SetValue(context.SourceTexture);
else if (i % 2 == 0)
_sourceTextureParameter.SetValue(temp1);
else
_sourceTextureParameter.SetValue(temp0);
_iterationParameter.SetValue(i);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp0);
renderTargetPool.Recycle(temp1);
}
public override void Render(IList<SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
throw new ArgumentNullException("nodes");
if (context == null)
throw new ArgumentNullException("context");
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
return;
Debug.Assert(context.CameraNode != null, "A camera node has to be set in the render context.");
Debug.Assert(context.Scene != null, "A scene has to be set in the render context.");
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalReferenceNode = context.ReferenceNode;
// Camera properties
var cameraNode = context.CameraNode;
var cameraPose = cameraNode.PoseWorld;
var projection = cameraNode.Camera.Projection;
if (!(projection is PerspectiveProjection))
throw new NotImplementedException("VSM shadow maps not yet implemented for scenes with perspective camera.");
float fieldOfViewY = projection.FieldOfViewY;
float aspectRatio = projection.AspectRatio;
// Update SceneNode.LastFrame for all rendered nodes.
int frame = context.Frame;
cameraNode.LastFrame = frame;
// The scene node renderer should use the light camera instead of the player camera.
context.CameraNode = _orthographicCameraNode;
// The shadow map is rendered using the technique "DirectionalVsm".
// See ShadowMap.fx in the DigitalRune source code folder.
context.Technique = "DirectionalVsm";
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var originalBlendState = graphicsDevice.BlendState;
var originalDepthStencilState = graphicsDevice.DepthStencilState;
var originalRasterizerState = graphicsDevice.RasterizerState;
for (int i = 0; i < numberOfNodes; i++)
{
var lightNode = nodes[i] as LightNode;
if (lightNode == null)
continue;
var shadow = lightNode.Shadow as VarianceShadow;
if (shadow == null)
continue;
// LightNode is visible in current frame.
lightNode.LastFrame = frame;
// The format of the shadow map:
var format = new RenderTargetFormat(
shadow.PreferredSize,
shadow.PreferredSize,
false,
shadow.Prefer16Bit ? SurfaceFormat.HalfVector2 : SurfaceFormat.Vector2, // VSM needs two channels!
DepthFormat.Depth24);
if (shadow.ShadowMap != null && shadow.IsLocked)
continue;
if (shadow.ShadowMap == null)
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(format);
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.BlendState = BlendState.Opaque;
// Render front and back faces for VSM due to low shadow map texel density.
// (VSM is usually used for distant geometry.)
graphicsDevice.RasterizerState = RasterizerState.CullNone;
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
context.RenderTarget = shadow.ShadowMap;
context.Viewport = graphicsDevice.Viewport;
graphicsDevice.Clear(Color.White);
// Compute an orthographic camera for the light.
// If Shadow.TargetArea is null, the shadow map should cover the area in front of the player camera.
// If Shadow.TargetArea is set, the shadow map should cover this static area.
if (shadow.TargetArea == null)
{
// near/far of this shadowed area.
float near = projection.Near;
float far = shadow.MaxDistance;
// Abort if near-far distances are invalid.
if (Numeric.IsGreaterOrEqual(near, far))
continue;
// Create a view volume for frustum part that is covered by the shadow map.
_cameraVolume.SetFieldOfView(fieldOfViewY, aspectRatio, near, far);
// Find the bounding sphere of the frustum part.
Vector3F center;
float radius;
GetBoundingSphere(_cameraVolume, out center, out radius);
// Convert center to light space.
Pose lightPose = lightNode.PoseWorld;
center = cameraPose.ToWorldPosition(center);
center = lightPose.ToLocalPosition(center);
// Snap center to texel positions to avoid shadow swimming.
SnapPositionToTexels(ref center, 2 * radius, shadow.ShadowMap.Height);
// Convert center back to world space.
center = lightPose.ToWorldPosition(center);
Matrix33F orientation = lightPose.Orientation;
Vector3F backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the target bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3F cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjection = (Matrix)view * orthographicProjection;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the camera frustum.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
}
else
{
// Get bounding sphere of static target area.
Aabb targetAabb = shadow.TargetArea.Value;
Vector3F center = targetAabb.Center;
float radius = (targetAabb.Maximum - center).Length;
// Convert center to light space.
Matrix33F orientation = lightNode.PoseWorld.Orientation;
Vector3F backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the target bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3F cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjection = (Matrix)view * orthographicProjection;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the camera frustum.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
}
context.ReferenceNode = lightNode;
context.Object = shadow;
// Render objects into shadow map.
bool shadowMapContainsSomething = RenderCallback(context);
if (shadowMapContainsSomething)
{
// Blur shadow map.
if (shadow.Filter != null && shadow.Filter.Scale > 0)
{
context.SourceTexture = shadow.ShadowMap;
shadow.Filter.Process(context);
context.SourceTexture = null;
}
}
else
{
// Shadow map is empty. Recycle it.
graphicsService.RenderTargetPool.Recycle(shadow.ShadowMap);
shadow.ShadowMap = null;
}
}
graphicsDevice.SetRenderTarget(null);
graphicsDevice.BlendState = originalBlendState;
graphicsDevice.DepthStencilState = originalDepthStencilState;
graphicsDevice.RasterizerState = originalRasterizerState;
context.CameraNode = cameraNode;
context.Technique = null;
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.ReferenceNode = originalReferenceNode;
context.Object = null;
}
/// <summary>
/// Performs post-processing using the specified collection of processors.
/// </summary>
/// <param name="processors">The post-processors.</param>
/// <param name="context">The render context.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="context"/> is <see langword="null"/>.
/// </exception>
private static void Process(IList <PostProcessor> processors, RenderContext context)
{
Debug.Assert(processors != null);
Debug.Assert(context != null);
Debug.Assert(context.SourceTexture != null);
if (context == null)
{
throw new ArgumentNullException("context");
}
var graphicsService = context.GraphicsService;
var renderTargetPool = graphicsService.RenderTargetPool;
var originalSourceTexture = context.SourceTexture;
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
// Some normal post-processors can be used with any blend state. In a chain
// alpha blending does not make sense.
graphicsService.GraphicsDevice.BlendState = BlendState.Opaque;
// Intermediate render targets for ping-ponging.
// TODO: Use the originalRenderTarget in the ping-ponging.
// (Currently, we create up to 2 temp targets. If the originalRenderTarget is not null,
// and if the viewport is the whole target, then we could use the originalRenderTarget
// in the ping-ponging. But care must be taken that the originalRenderTarget is never
// used as the output for the post-processor before the last post-processor...)
RenderTarget2D tempSource = null;
RenderTarget2D tempTarget = null;
// The size and format for intermediate render target is determined by the source image.
var tempFormat = new RenderTargetFormat(originalSourceTexture)
{
Mipmap = false,
DepthStencilFormat = DepthFormat.None,
};
// Remember if any processor has written into target.
bool targetWritten = false;
// Execute all processors.
var numberOfProcessors = processors.Count;
for (int i = 0; i < numberOfProcessors; i++)
{
var processor = processors[i];
if (!processor.Enabled)
{
continue;
}
// Find effective output target:
// If this processor is the last, then we render into the user-defined target.
// If this is not the last processor, then we use an intermediate buffer.
if (IsLastOutputProcessor(processors, i))
{
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
targetWritten = true;
}
else
{
// This is an intermediate post-processor, so we need an intermediate target.
// If we have one, does it still have the correct format? If not, recycle it.
if (tempTarget != null && !processor.DefaultTargetFormat.IsCompatibleWith(tempFormat))
{
renderTargetPool.Recycle(tempTarget);
tempTarget = null;
}
if (tempTarget == null)
{
// Get a new render target.
// The format that the processor wants has priority. The current format
// is the fallback.
tempFormat = new RenderTargetFormat(
processor.DefaultTargetFormat.Width ?? tempFormat.Width,
processor.DefaultTargetFormat.Height ?? tempFormat.Height,
processor.DefaultTargetFormat.Mipmap ?? tempFormat.Mipmap,
processor.DefaultTargetFormat.SurfaceFormat ?? tempFormat.SurfaceFormat,
processor.DefaultTargetFormat.DepthStencilFormat ?? tempFormat.DepthStencilFormat);
tempTarget = renderTargetPool.Obtain2D(tempFormat);
}
context.RenderTarget = tempTarget;
context.Viewport = new Viewport(0, 0, tempFormat.Width.Value, tempFormat.Height.Value);
}
processor.ProcessInternal(context);
context.SourceTexture = context.RenderTarget;
// If we have rendered into tempTarget, then we remember it in tempSource
// and reuse the render target in tempSource if any is set.
if (context.RenderTarget == tempTarget)
{
Mathematics.MathHelper.Swap(ref tempSource, ref tempTarget);
}
}
// If there are no processors, or no processor is enabled, then we have to
// copy the source to the target manually.
if (!targetWritten)
{
graphicsService.GetCopyFilter().ProcessInternal(context);
}
context.SourceTexture = originalSourceTexture;
// The last processor should have written into the original target.
Debug.Assert(context.RenderTarget == originalRenderTarget);
renderTargetPool.Recycle(tempSource);
renderTargetPool.Recycle(tempTarget);
}
private int AssignShadowMask(LightNode lightNode, RenderContext context)
{
// Each shadow mask has 4 8-bit channels. We must assign a shadow mask channel to
// each shadow-casting light. Non-overlapping lights can use the same channel.
// Overlapping lights must use different channels. If we run out of channels,
// we remove some lights from the list.
var scene = context.Scene;
var viewport = context.Viewport;
int maskWidth = viewport.Width;
int maskHeight = viewport.Height;
if (UseHalfResolution && Numeric.IsLessOrEqual(UpsampleDepthSensitivity, 0))
{
// Half-res rendering with no upsampling.
maskWidth /= 2;
maskHeight /= 2;
}
// Loop over all bins until we find one which can be used for this light node.
int binIndex;
for (binIndex = 0; binIndex < _shadowMaskBins.Length; binIndex++)
{
var bin = _shadowMaskBins[binIndex];
// Check if the light node touches any other light nodes in this bin.
bool hasContact = false;
foreach (var otherLightNode in bin)
{
if (scene.HaveContact(lightNode, otherLightNode))
{
hasContact = true;
break;
}
}
// No overlap. Use this bin.
if (!hasContact)
{
bin.Add(lightNode);
break;
}
}
if (binIndex >= _shadowMaskBins.Length)
return -1; // Light node does not fit into any bin.
int shadowMaskIndex = binIndex / 4;
if (_shadowMasks[shadowMaskIndex] == null)
{
// Create shadow mask.
var shadowMaskFormat = new RenderTargetFormat(maskWidth, maskHeight, false, SurfaceFormat.Color, DepthFormat.None);
_shadowMasks[shadowMaskIndex] = context.GraphicsService.RenderTargetPool.Obtain2D(shadowMaskFormat);
}
// Assign shadow mask to light node.
lightNode.Shadow.ShadowMask = _shadowMasks[shadowMaskIndex];
lightNode.Shadow.ShadowMaskChannel = binIndex % 4;
return shadowMaskIndex;
}
public override void Render(IList<SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
throw new ArgumentNullException("nodes");
if (context == null)
throw new ArgumentNullException("context");
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
return;
context.ThrowIfCameraMissing();
context.ThrowIfSceneMissing();
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalReferenceNode = context.ReferenceNode;
// Camera properties
var cameraNode = context.CameraNode;
var cameraPose = cameraNode.PoseWorld;
var projection = cameraNode.Camera.Projection;
if (!(projection is PerspectiveProjection))
throw new NotImplementedException(
"Cascaded shadow maps not yet implemented for scenes with orthographic camera.");
float fieldOfViewY = projection.FieldOfViewY;
float aspectRatio = projection.AspectRatio;
// Update SceneNode.LastFrame for all visible nodes.
int frame = context.Frame;
cameraNode.LastFrame = frame;
// The scene node renderer should use the light camera instead of the player camera.
context.CameraNode = _orthographicCameraNode;
context.Technique = "Directional";
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
for (int i = 0; i < numberOfNodes; i++)
{
var lightNode = nodes[i] as LightNode;
if (lightNode == null)
continue;
var shadow = lightNode.Shadow as CascadedShadow;
if (shadow == null)
continue;
// LightNode is visible in current frame.
lightNode.LastFrame = frame;
var format = new RenderTargetFormat(
shadow.PreferredSize * shadow.NumberOfCascades,
shadow.PreferredSize,
false,
shadow.Prefer16Bit ? SurfaceFormat.HalfSingle : SurfaceFormat.Single,
DepthFormat.Depth24);
bool allLocked = shadow.IsCascadeLocked[0] && shadow.IsCascadeLocked[1] && shadow.IsCascadeLocked[2] && shadow.IsCascadeLocked[3];
if (shadow.ShadowMap == null)
{
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(format);
allLocked = false; // Need to render shadow map.
}
// If we can reuse the whole shadow map texture, abort early.
if (allLocked)
continue;
_csmSplitDistances[0] = projection.Near;
_csmSplitDistances[1] = shadow.Distances.X;
_csmSplitDistances[2] = shadow.Distances.Y;
_csmSplitDistances[3] = shadow.Distances.Z;
_csmSplitDistances[4] = shadow.Distances.W;
// (Re-)Initialize the array for cached matrices in the CascadedShadow.
if (shadow.ViewProjections == null || shadow.ViewProjections.Length < shadow.NumberOfCascades)
shadow.ViewProjections = new Matrix[shadow.NumberOfCascades];
// Initialize the projection matrices to an empty matrix.
// The unused matrices should not contain valid projections because
// CsmComputeSplitOptimized in CascadedShadowMask.fxh should not choose
// the wrong cascade.
for (int j = 0; j < shadow.ViewProjections.Length; j++)
{
if (!shadow.IsCascadeLocked[j]) // Do not delete cached info for cached cascade.
shadow.ViewProjections[j] = new Matrix();
}
// If some cascades are cached, we have to create a new shadow map and copy
// the old cascades into the new shadow map.
if (shadow.IsCascadeLocked[0] || shadow.IsCascadeLocked[1] || shadow.IsCascadeLocked[2] || shadow.IsCascadeLocked[3])
{
var oldShadowMap = shadow.ShadowMap;
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(new RenderTargetFormat(oldShadowMap));
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
graphicsDevice.Clear(Color.White);
var spriteBatch = graphicsService.GetSpriteBatch();
spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
for (int cascade = 0; cascade < shadow.NumberOfCascades; cascade++)
{
if (shadow.IsCascadeLocked[cascade])
{
var viewport = GetViewport(shadow, cascade);
var rectangle = new Rectangle(viewport.X, viewport.Y, viewport.Width, viewport.Height);
spriteBatch.Draw(oldShadowMap, rectangle, rectangle, Color.White);
}
}
spriteBatch.End();
graphicsService.RenderTargetPool.Recycle(oldShadowMap);
}
else
{
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
graphicsDevice.Clear(Color.White);
}
context.RenderTarget = shadow.ShadowMap;
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
graphicsDevice.BlendState = BlendState.Opaque;
context.ReferenceNode = lightNode;
context.Object = shadow;
context.ShadowNear = 0; // Obsolete: Only kept for backward compatibility.
bool shadowMapContainsSomething = false;
for (int split = 0; split < shadow.NumberOfCascades; split++)
{
if (shadow.IsCascadeLocked[split])
continue;
context.Data[RenderContextKeys.ShadowTileIndex] = CubeMapShadowMapRenderer.BoxedIntegers[split];
// near/far of this split.
float near = _csmSplitDistances[split];
float far = Math.Max(_csmSplitDistances[split + 1], near + Numeric.EpsilonF);
// Create a view volume for this split.
_splitVolume.SetFieldOfView(fieldOfViewY, aspectRatio, near, far);
// Find the bounding sphere of the split camera frustum.
Vector3F center;
float radius;
GetBoundingSphere(_splitVolume, out center, out radius);
// Extend radius to get enough border for filtering.
int shadowMapSize = shadow.ShadowMap.Height;
// We could extend by (ShadowMapSize + BorderTexels) / ShadowMapSize;
// Add at least 1 texel. (This way, shadow mask shader can clamp uv to
// texture rect in without considering half texel border to avoid sampling outside..)
radius *= (float)(shadowMapSize + 1) / shadowMapSize;
// Convert center to light space.
Pose lightPose = lightNode.PoseWorld;
center = cameraPose.ToWorldPosition(center);
center = lightPose.ToLocalPosition(center);
// Snap center to texel positions to avoid shadow swimming.
SnapPositionToTexels(ref center, 2 * radius, shadowMapSize);
// Convert center back to world space.
center = lightPose.ToWorldPosition(center);
Matrix33F orientation = lightPose.Orientation;
Vector3F backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the cascade's bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3F cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjections[split] = (Matrix)view * orthographicProjection;
// Convert depth bias from "texel" to light space [0, 1] depth.
// Minus sign to move receiver depth closer to light. Divide by depth to normalize.
float unitsPerTexel = orthographicProjection.Width / shadow.ShadowMap.Height;
shadow.EffectiveDepthBias[split] = -shadow.DepthBias[split] * unitsPerTexel / orthographicProjection.Depth;
// Convert normal offset from "texel" to world space.
shadow.EffectiveNormalOffset[split] = shadow.NormalOffset[split] * unitsPerTexel;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the cascade.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
// Set a viewport to render a tile in the texture atlas.
graphicsDevice.Viewport = GetViewport(shadow, split);
context.Viewport = graphicsDevice.Viewport;
shadowMapContainsSomething |= RenderCallback(context);
}
// Recycle shadow map if empty.
if (!shadowMapContainsSomething)
{
graphicsService.RenderTargetPool.Recycle(shadow.ShadowMap);
shadow.ShadowMap = null;
}
}
graphicsDevice.SetRenderTarget(null);
savedRenderState.Restore();
context.CameraNode = cameraNode;
context.ShadowNear = float.NaN;
context.Technique = null;
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.ReferenceNode = originalReferenceNode;
context.Object = null;
context.Data[RenderContextKeys.ShadowTileIndex] = null;
}
protected override void OnRender(RenderContext context)
{
// This screen expects two cameras.
if (ActiveCameraNode == null || ActiveCameraNodeB == null)
return;
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
// Get a render target for the first camera. Use half the width because we split
// the screen horizontally.
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = fullViewport.Width / 2
};
var renderTargetA = renderTargetPool.Obtain2D(format);
context.Scene = Scene;
context.LodHysteresis = 0.5f;
context.LodBias = 1.0f;
context.LodBlendingEnabled = true;
for (int i = 0; i < 2; i++)
{
if (i == 0)
{
// The first camera renders into renderTargetA.
context.CameraNode = ActiveCameraNode;
context.Viewport = new Viewport(0, 0, fullViewport.Width / 2, fullViewport.Height);
context.RenderTarget = renderTargetA;
}
else
{
// The second camera renders into the right half of the final render target.
context.CameraNode = ActiveCameraNodeB;
context.Viewport = new Viewport(fullViewport.X + fullViewport.Width / 2, fullViewport.Y, fullViewport.Width / 2, fullViewport.Height);
context.RenderTarget = originalRenderTarget;
}
context.LodCameraNode = context.CameraNode;
// Get all scene nodes which overlap the camera frustum.
CustomSceneQuery sceneQuery = Scene.Query<CustomSceneQuery>(context.CameraNode, context);
// Render the scene nodes of the sceneQuery.
RenderScene(sceneQuery, context, true, true, true, true);
// ----- Copy image of first camera.
if (i == 1)
{
// Copy the upper screen from the temporary render target back into the back buffer.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(
renderTargetA,
new Rectangle(0, 0, fullViewport.Width / 2, fullViewport.Height),
Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(renderTargetA);
}
}
// Clean-up
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
context.RenderPass = null;
}
// Perform FFTs.
// 4 complex input images: source0.xy, source0.zw, source1.xy, source1.zw
// 2 targets: target0 = displacement map, target1 = normal map using Color format.
public void Process(RenderContext context, bool forward, Texture2D source0, Texture2D source1, RenderTarget2D target0, RenderTarget2D target1, float choppiness)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (source0 == null)
{
throw new ArgumentNullException("source0");
}
if (source1 == null)
{
throw new ArgumentNullException("source1");
}
if (forward)
{
// For forward FFT, uncomment the LastPassScale stuff!
throw new NotImplementedException("Forward FFT not implemented.");
}
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = RasterizerState.CullNone;
graphicsDevice.DepthStencilState = DepthStencilState.None;
int size = source0.Width;
_parameterSize.SetValue((float)size);
_parameterChoppiness.SetValue(choppiness);
int numberOfButterflyPasses = (int)MathHelper.Log2GreaterOrEqual((uint)source0.Width);
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
_parameterButterflyTexture.SetValue(GetButterflyTexture(forward, numberOfButterflyPasses));
var format = new RenderTargetFormat(size, size, false, source0.Format, DepthFormat.None);
var tempPing0 = renderTargetPool.Obtain2D(format);
var tempPing1 = renderTargetPool.Obtain2D(format);
var tempPong0 = renderTargetPool.Obtain2D(format);
var tempPong1 = renderTargetPool.Obtain2D(format);
//_parameterIsLastPass.SetValue(false);
// Perform horizontal and vertical FFT pass.
for (int i = 0; i < 2; i++)
{
//_parameterLastPassScale.SetValue(1);
// Perform butterfly passes. We ping-pong between two temp targets.
for (int pass = 0; pass < numberOfButterflyPasses; pass++)
{
_parameterButterflyIndex.SetValue(0.5f / numberOfButterflyPasses + (float)pass / numberOfButterflyPasses);
if (i == 0 && pass == 0)
{
// First pass.
_renderTargetBindings[0] = new RenderTargetBinding(tempPing0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPing1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(source0);
_parameterSourceTexture1.SetValue(source1);
}
else if (i == 1 && pass == numberOfButterflyPasses - 1)
{
// Last pass.
// We have explicit shader passes for the last FFT pass.
break;
//_parameterIsLastPass.SetValue(true);
//if (forward)
// _parameterLastPassScale.SetValue(1.0f / size / size);
//if (_renderTargetBindings[0].RenderTarget == tempPing0)
//{
// _renderTargetBindings[0] = new RenderTargetBinding(target0);
// _renderTargetBindings[1] = new RenderTargetBinding(target1);
// graphicsDevice.SetRenderTargets(_renderTargetBindings);
// _parameterSourceTexture0.SetValue(tempPing0);
// _parameterSourceTexture1.SetValue(tempPing1);
//}
//else
//{
// _renderTargetBindings[0] = new RenderTargetBinding(target0);
// _renderTargetBindings[1] = new RenderTargetBinding(target1);
// graphicsDevice.SetRenderTargets(_renderTargetBindings);
// _parameterSourceTexture0.SetValue(tempPong0);
// _parameterSourceTexture1.SetValue(tempPong1);
//}
}
else
{
// Intermediate pass.
if (_renderTargetBindings[0].RenderTarget == tempPing0)
{
_renderTargetBindings[0] = new RenderTargetBinding(tempPong0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPong1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(tempPing0);
_parameterSourceTexture1.SetValue(tempPing1);
}
else
{
_renderTargetBindings[0] = new RenderTargetBinding(tempPing0);
_renderTargetBindings[1] = new RenderTargetBinding(tempPing1);
graphicsDevice.SetRenderTargets(_renderTargetBindings);
_parameterSourceTexture0.SetValue(tempPong0);
_parameterSourceTexture1.SetValue(tempPong1);
}
}
if (i == 0)
{
_passFftHorizontal.Apply();
}
else
{
_passFftVertical.Apply();
}
graphicsDevice.DrawFullScreenQuad();
}
}
// Perform final vertical FFT passes. We have to perform them separately
// because displacement map and normal map usually have different bit depth.
// Final pass for displacement.
graphicsDevice.SetRenderTarget(target0);
if (_renderTargetBindings[1].RenderTarget == tempPing1)
{
_parameterSourceTexture0.SetValue(tempPing0);
}
else
{
_parameterSourceTexture0.SetValue(tempPong0);
}
_passFftDisplacement.Apply();
graphicsDevice.DrawFullScreenQuad();
// Final pass for normals.
graphicsDevice.SetRenderTarget(target1);
if (_renderTargetBindings[1].RenderTarget == tempPing1)
{
_parameterSourceTexture0.SetValue(tempPing1);
}
else
{
_parameterSourceTexture0.SetValue(tempPong1);
}
_passFftNormal.Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean up.
_renderTargetBindings[0] = default(RenderTargetBinding);
_renderTargetBindings[1] = default(RenderTargetBinding);
_parameterButterflyTexture.SetValue((Texture2D)null);
_parameterSourceTexture0.SetValue((Texture2D)null);
_parameterSourceTexture1.SetValue((Texture2D)null);
renderTargetPool.Recycle(tempPing0);
renderTargetPool.Recycle(tempPing1);
renderTargetPool.Recycle(tempPong0);
renderTargetPool.Recycle(tempPong1);
savedRenderState.Restore();
// Reset the texture stages. If a floating point texture is set, we get exceptions
// when a sampler with bilinear filtering is set.
graphicsDevice.ResetTextures();
}
public override void Render(IList<SceneNode> nodes, RenderContext context, RenderOrder order)
{
var graphicsService = context.GraphicsService;
var renderTargetPool = graphicsService.RenderTargetPool;
var graphicsDevice = graphicsService.GraphicsDevice;
// Get a shared RebuildZBufferRenderer which was added by the graphics screen.
var rebuildZBufferRenderer = (RebuildZBufferRenderer)context.Data[RenderContextKeys.RebuildZBufferRenderer];
// We only support a render order of "user defined". This is always the case
// if this renderer is added to a SceneRenderer. The SceneRenderer does the sorting.
Debug.Assert(order == RenderOrder.UserDefined);
// This renderer assumes that the current render target is an off-screen render target.
Debug.Assert(context.RenderTarget != null);
graphicsDevice.ResetTextures();
// Remember the format of the current render target.
var backBufferFormat = new RenderTargetFormat(context.RenderTarget);
// In the loop below we will use the context.SourceTexture property.
// Remember the original source texture.
var originalSourceTexture = context.SourceTexture;
context.SourceTexture = null;
for (int i = 0; i < nodes.Count; i++)
{
var node = (MeshNode)nodes[i];
// Check if the next node wants to sample from the back buffer.
if (RequiresSourceTexture(node, context))
{
// The effect of the node wants to sample from the "SourceTexture".
// Per default, DigitalRune Graphics uses a delegate effect parameter
// binding to set the "SourceTexture" parameters to the
// RenderContext.SourceTexture value. However, this property is usually
// null. We need to manually set RenderContext.SourceTexture to the
// current back buffer render target. Since, we cannot read from this
// render target and write to this render target at the same time,
// we have to copy it.
context.SourceTexture = context.RenderTarget;
// Set a new render target and copy the content of the lastBackBuffer
// and the depth buffer.
context.RenderTarget = renderTargetPool.Obtain2D(backBufferFormat);
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
rebuildZBufferRenderer.Render(context, context.SourceTexture);
}
// Add current node to a temporary list.
_tempList.Add(node);
// Add all following nodes until another node wants to sample from the
// back buffer.
for (int j = i + 1; j < nodes.Count; j++)
{
node = (MeshNode)nodes[j];
if (RequiresSourceTexture(node, context))
break;
_tempList.Add(node);
i++;
}
// Render nodes.
_meshRenderer.Render(_tempList, context);
renderTargetPool.Recycle(context.SourceTexture);
context.SourceTexture = null;
_tempList.Clear();
}
// Restore original render context.
context.SourceTexture = originalSourceTexture;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var viewport = context.Viewport;
Vector2 size = new Vector2(viewport.Width, viewport.Height);
// Choose suitable technique.
// We do not have shader for each sample count.
int numberOfSamples = NumberOfSamples;
SetCurrentTechnique(ref numberOfSamples);
// Apply current scale and texture size to offsets.
for (int i = 0; i < NumberOfSamples; i++)
{
_horizontalOffsets[i].X = Offsets[i].X * Scale / size.X;
_horizontalOffsets[i].Y = Offsets[i].Y * Scale / size.Y;
}
// Make sure the other samples are 0 (e.g. if we want 11 samples but the
// next best shader supports only 15 samples).
for (int i = NumberOfSamples; i < numberOfSamples; i++)
{
_horizontalOffsets[i].X = 0;
_horizontalOffsets[i].Y = 0;
Weights[i] = 0;
}
// If we have a separable filter, we initialize _verticalOffsets too.
if (IsSeparable)
{
if (_verticalOffsets == null)
{
_verticalOffsets = new Vector2[MaxNumberOfSamples];
}
float aspectRatio = size.X / size.Y;
for (int i = 0; i < NumberOfSamples; i++)
{
_verticalOffsets[i].X = _horizontalOffsets[i].Y * aspectRatio;
_verticalOffsets[i].Y = _horizontalOffsets[i].X * aspectRatio;
}
for (int i = NumberOfSamples; i < numberOfSamples; i++)
{
_verticalOffsets[i].X = 0;
_verticalOffsets[i].Y = 0;
}
}
// Use hardware filtering if possible.
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
bool isAnisotropic = IsAnisotropic;
bool isBilateral = IsBilateral;
if (FilterInLogSpace)
{
// Anisotropic and bilateral filtering in log-space is not implemented.
isAnisotropic = false;
isBilateral = false;
}
else
{
if (isAnisotropic || isBilateral)
{
context.ThrowIfCameraMissing();
var cameraNode = context.CameraNode;
var projection = cameraNode.Camera.Projection;
float far = projection.Far;
GraphicsHelper.GetFrustumFarCorners(cameraNode.Camera.Projection, _frustumFarCorners);
_parameterFrustumCorners.SetValue(_frustumFarCorners);
_parameterBlurParameters0.SetValue(new Vector4(
far,
viewport.AspectRatio,
1.0f / (EdgeSoftness + 0.001f) * far,
DepthScaling));
context.ThrowIfGBuffer0Missing();
Texture2D depthBuffer = context.GBuffer0;
if (viewport.Width < depthBuffer.Width && viewport.Height < depthBuffer.Height)
{
// Use half-resolution depth buffer.
object obj;
if (context.Data.TryGetValue(RenderContextKeys.DepthBufferHalf, out obj))
{
var depthBufferHalf = obj as Texture2D;
if (depthBufferHalf != null)
{
depthBuffer = depthBufferHalf;
}
}
}
_parameterGBuffer0.SetValue(depthBuffer);
}
}
_parameterViewportSize.SetValue(size);
_parameterWeights.SetValue(Weights);
int effectiveNumberOfPasses = IsSeparable ? NumberOfPasses * 2 : NumberOfPasses;
// We use up to two temporary render targets for ping-ponging.
var tempFormat = new RenderTargetFormat((int)size.X, (int)size.Y, false, context.SourceTexture.Format, DepthFormat.None);
var tempTarget0 = (effectiveNumberOfPasses > 1)
? renderTargetPool.Obtain2D(tempFormat)
: null;
var tempTarget1 = (effectiveNumberOfPasses > 2)
? renderTargetPool.Obtain2D(tempFormat)
: null;
for (int i = 0; i < effectiveNumberOfPasses; i++)
{
if (i == effectiveNumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(tempTarget0);
}
else
{
graphicsDevice.SetRenderTarget(tempTarget1);
}
if (i == 0)
{
_parameterSourceTexture.SetValue(context.SourceTexture);
}
else if (i % 2 == 0)
{
_parameterSourceTexture.SetValue(tempTarget1);
}
else
{
_parameterSourceTexture.SetValue(tempTarget0);
}
Vector2[] offsets;
if (IsSeparable && i % 2 != 0 &&
!isAnisotropic) // The anisotropic filter only reads Offsets[i].x
{
offsets = _verticalOffsets;
}
else
{
offsets = _horizontalOffsets;
}
_parameterOffsets.SetValue(offsets);
int passIndex = 0;
if (isAnisotropic)
{
passIndex = i % 2;
}
_effect.CurrentTechnique.Passes[passIndex].Apply();
graphicsDevice.DrawFullScreenQuad();
}
_parameterSourceTexture.SetValue((Texture2D)null);
renderTargetPool.Recycle(tempTarget0);
renderTargetPool.Recycle(tempTarget1);
}
protected override void OnRender(RenderContext context)
{
if (ActiveCameraNode == null)
return;
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
context.LodCameraNode = ActiveCameraNode;
// Copy all scene nodes into a list.
CopyNodesToList(Scene, _sceneNodes);
// ----- Occlusion Culling
// Usually, we would make a scene query to get all scene nodes within the
// viewing frustum. But in this example we will use the new OcclusionBuffer.
if (EnableCulling)
{
// Render all occluders into the occlusion buffer.
// - "_sceneNodes" is a list of all scene nodes. The OcclusionBuffer will
// go through the list and render all occluders.
// - "LightNode" is the main directional light that casts a cascaded shadow.
// Passing the light node to the OcclusionBuffer activates shadow caster
// culling.
// - A custom scene node renderer can be passed to the OcclusionBuffer. In
// this example, the ground mesh "Gravel/Gravel.fbx" has a material with an
// "Occluder" render pass. When we pass the "MeshRenderer" to the OcclusionBuffer
// the ground mesh will be rendered directly into the occlusion buffer.
Profiler.Start("Occlusion.Render");
context.RenderPass = "******";
OcclusionBuffer.Render(_sceneNodes, LightNode, MeshRenderer, context);
context.RenderPass = null;
Profiler.Stop("Occlusion.Render");
// Perform occlusion culling on the specified list of scene nodes.
// - The scene nodes will be tested against the occluders. If a scene node
// is hidden, it will be replaced with a null entry in the list.
// - When shadow caster culling is active, shadow casting scene nodes will
// also be tested against the occluders. If the shadow is not visible,
// the shadow caster will internally be marked as occluded. The ShadowMapRenderer
// will automatically skip occluded scene nodes.
Profiler.Start("Occlusion.Query");
OcclusionBuffer.Query(_sceneNodes, context);
Profiler.Stop("Occlusion.Query");
}
// The base DeferredGraphicsScreen expects a CustomSceneQuery.
// --> Copy the occlusion culling results to a CustomSceneQuery.
_sceneQuery.Set(ActiveCameraNode, _sceneNodes, context);
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
RenderTarget2D topDownRenderTarget = null;
const int topDownViewSize = 384;
if (ShowTopDownView)
{
// Render top-down scene into an offscreen render target.
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = topDownViewSize,
Height = topDownViewSize,
};
topDownRenderTarget = renderTargetPool.Obtain2D(format);
context.Scene = Scene;
context.CameraNode = _topDownCameraNode;
context.Viewport = new Viewport(0, 0, topDownViewSize, topDownViewSize);
context.RenderTarget = topDownRenderTarget;
RenderScene(_sceneQuery, context, true, false, false, false);
_debugRenderer.Clear();
_debugRenderer.DrawObject(ActiveCameraNode, Color.Red, true, true);
_debugRenderer.Render(context);
context.RenderTarget = originalRenderTarget;
context.Viewport = fullViewport;
}
// Render regular 3D scene.
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
RenderScene(_sceneQuery, context, true, false, true, false);
// Render debug visualization on top of scene.
bool renderObject = false;
switch (DebugVisualization)
{
case DebugVisualization.CameraHzb:
OcclusionBuffer.VisualizeCameraBuffer(DebugLevel, context);
break;
case DebugVisualization.LightHzb:
OcclusionBuffer.VisualizeLightBuffer(DebugLevel, context);
break;
case DebugVisualization.Object:
OcclusionBuffer.VisualizeObject(DebugObject, context);
renderObject = true;
break;
case DebugVisualization.ShadowCaster:
OcclusionBuffer.VisualizeShadowCaster(DebugObject, context);
break;
case DebugVisualization.ShadowVolume:
OcclusionBuffer.VisualizeShadowVolume(DebugObject, context);
renderObject = true;
break;
}
if (renderObject)
{
_debugRenderer.Clear();
_debugRenderer.DrawObject(DebugObject, Color.Yellow, true, true);
_debugRenderer.Render(context);
}
if (ShowTopDownView)
{
// Copy offscreen buffer to screen.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(
topDownRenderTarget,
new Rectangle(fullViewport.Width - topDownViewSize, fullViewport.Height - topDownViewSize, topDownViewSize, topDownViewSize),
Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(topDownRenderTarget);
}
// Clean-up
_sceneNodes.Clear();
_sceneQuery.Reset();
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
// We use two temporary render targets.
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, context.SourceTexture.Format, DepthFormat.None);
RenderTarget2D temp0 = (NumberOfPasses > 1)
? renderTargetPool.Obtain2D(tempFormat)
: null;
RenderTarget2D temp1 = (NumberOfPasses > 2)
? renderTargetPool.Obtain2D(tempFormat)
: null;
bool useHalfPixelOffset = !TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format);
if (useHalfPixelOffset)
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
_useHalfPixelOffsetParameter.SetValue(1.0f);
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
_useHalfPixelOffsetParameter.SetValue(0.0f);
}
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
for (int i = 0; i < NumberOfPasses; i++)
{
if (i == NumberOfPasses - 1)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else if (i % 2 == 0)
{
graphicsDevice.SetRenderTarget(temp0);
}
else
{
graphicsDevice.SetRenderTarget(temp1);
}
if (i == 0)
{
_sourceTextureParameter.SetValue(context.SourceTexture);
}
else if (i % 2 == 0)
{
_sourceTextureParameter.SetValue(temp1);
}
else
{
_sourceTextureParameter.SetValue(temp0);
}
// The iteration value goes from 0 ... (n - 1) or 1 ... n depending on
// whether a half-pixel offset is used.
_iterationParameter.SetValue((float)(useHalfPixelOffset ? i : i + 1));
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp0);
renderTargetPool.Recycle(temp1);
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
RenderTarget2D rgbLuma = null;
if (ComputeLuminance)
{
var rgbLumaFormat = new RenderTargetFormat(
context.SourceTexture.Width,
context.SourceTexture.Height,
false,
context.SourceTexture.Format,
DepthFormat.None);
rgbLuma = renderTargetPool.Obtain2D(rgbLumaFormat);
graphicsDevice.SetRenderTarget(rgbLuma);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_luminanceToAlphaPass.Apply();
graphicsDevice.DrawFullScreenQuad();
}
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(ComputeLuminance ? rgbLuma : context.SourceTexture);
_fxaaPass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(rgbLuma);
}
protected override void OnRender(RenderContext context)
{
// This screen expects two cameras.
if (ActiveCameraNode == null || ActiveCameraNodeB == null)
{
return;
}
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
// Get a render target for the first camera. Use half the width because we split
// the screen horizontally.
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = fullViewport.Width / 2
};
var renderTargetA = renderTargetPool.Obtain2D(format);
context.Scene = Scene;
context.LodHysteresis = 0.5f;
context.LodBias = 1.0f;
context.LodBlendingEnabled = true;
for (int i = 0; i < 2; i++)
{
if (i == 0)
{
// The first camera renders into renderTargetA.
context.CameraNode = ActiveCameraNode;
context.Viewport = new Viewport(0, 0, fullViewport.Width / 2, fullViewport.Height);
context.RenderTarget = renderTargetA;
}
else
{
// The second camera renders into the right half of the final render target.
context.CameraNode = ActiveCameraNodeB;
context.Viewport = new Viewport(fullViewport.X + fullViewport.Width / 2, fullViewport.Y, fullViewport.Width / 2, fullViewport.Height);
context.RenderTarget = originalRenderTarget;
}
context.LodCameraNode = context.CameraNode;
// Get all scene nodes which overlap the camera frustum.
CustomSceneQuery sceneQuery = Scene.Query <CustomSceneQuery>(context.CameraNode, context);
// Render the scene nodes of the sceneQuery.
RenderScene(sceneQuery, context, true, true, true, true);
// ----- Copy image of first camera.
if (i == 1)
{
// Copy the upper screen from the temporary render target back into the back buffer.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(
renderTargetA,
new Rectangle(0, 0, fullViewport.Width / 2, fullViewport.Height),
Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(renderTargetA);
}
}
// Clean-up
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
context.RenderPass = null;
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
var tempFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
RenderTarget2D blurredScene = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
context.RenderTarget = blurredScene;
context.Viewport = new Viewport(0, 0, blurredScene.Width, blurredScene.Height);
// Get view-dependent information stored in camera node.
var cameraNode = context.CameraNode;
object dummy;
cameraNode.ViewDependentData.TryGetValue(this, out dummy);
var data = dummy as ViewDependentData;
if (data == null)
{
data = new ViewDependentData(GraphicsService);
cameraNode.ViewDependentData[this] = data;
}
if (data.LastBlurredScene == null)
{
// This is the first frame. Simply remember the current source for the next frame.
_copyFilter.Process(context);
}
else
{
// Create new blurred scene.
graphicsDevice.SetRenderTarget(blurredScene);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_strengthParameter.SetValue(Strength);
_sourceTextureParameter.SetValue(source);
_lastSourceTextureParameter.SetValue(data.LastBlurredScene);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Copy blurredScene to target.
context.SourceTexture = blurredScene;
context.RenderTarget = target;
context.Viewport = viewport;
_copyFilter.Process(context);
// Recycle old blurred scene and store new scene (switch render targets).
GraphicsService.RenderTargetPool.Recycle(data.LastBlurredScene);
data.LastBlurredScene = blurredScene;
_sourceTextureParameter.SetValue((Texture2D)null);
_lastSourceTextureParameter.SetValue((Texture2D)null);
// Restore original context.
context.SourceTexture = source;
}
public override void Render(IList <SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
{
throw new ArgumentNullException("nodes");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
{
return;
}
context.ThrowIfCameraMissing();
context.ThrowIfSceneMissing();
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalReferenceNode = context.ReferenceNode;
// Camera properties
var cameraNode = context.CameraNode;
var cameraPose = cameraNode.PoseWorld;
var projection = cameraNode.Camera.Projection;
if (!(projection is PerspectiveProjection))
{
throw new NotImplementedException(
"Cascaded shadow maps not yet implemented for scenes with orthographic camera.");
}
float fieldOfViewY = projection.FieldOfViewY;
float aspectRatio = projection.AspectRatio;
// Update SceneNode.LastFrame for all visible nodes.
int frame = context.Frame;
cameraNode.LastFrame = frame;
// The scene node renderer should use the light camera instead of the player camera.
context.CameraNode = _orthographicCameraNode;
context.Technique = "Directional";
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
for (int i = 0; i < numberOfNodes; i++)
{
var lightNode = nodes[i] as LightNode;
if (lightNode == null)
{
continue;
}
var shadow = lightNode.Shadow as CascadedShadow;
if (shadow == null)
{
continue;
}
// LightNode is visible in current frame.
lightNode.LastFrame = frame;
var format = new RenderTargetFormat(
shadow.PreferredSize * shadow.NumberOfCascades,
shadow.PreferredSize,
false,
shadow.Prefer16Bit ? SurfaceFormat.HalfSingle : SurfaceFormat.Single,
DepthFormat.Depth24);
bool allLocked = shadow.IsCascadeLocked[0] && shadow.IsCascadeLocked[1] && shadow.IsCascadeLocked[2] && shadow.IsCascadeLocked[3];
if (shadow.ShadowMap == null)
{
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(format);
allLocked = false; // Need to render shadow map.
}
// If we can reuse the whole shadow map texture, abort early.
if (allLocked)
{
continue;
}
_csmSplitDistances[0] = projection.Near;
_csmSplitDistances[1] = shadow.Distances.X;
_csmSplitDistances[2] = shadow.Distances.Y;
_csmSplitDistances[3] = shadow.Distances.Z;
_csmSplitDistances[4] = shadow.Distances.W;
// (Re-)Initialize the array for cached matrices in the CascadedShadow.
if (shadow.ViewProjections == null || shadow.ViewProjections.Length < shadow.NumberOfCascades)
{
shadow.ViewProjections = new Matrix[shadow.NumberOfCascades];
}
// Initialize the projection matrices to an empty matrix.
// The unused matrices should not contain valid projections because
// CsmComputeSplitOptimized in CascadedShadowMask.fxh should not choose
// the wrong cascade.
for (int j = 0; j < shadow.ViewProjections.Length; j++)
{
if (!shadow.IsCascadeLocked[j]) // Do not delete cached info for cached cascade.
{
shadow.ViewProjections[j] = new Matrix();
}
}
// If some cascades are cached, we have to create a new shadow map and copy
// the old cascades into the new shadow map.
if (shadow.IsCascadeLocked[0] || shadow.IsCascadeLocked[1] || shadow.IsCascadeLocked[2] || shadow.IsCascadeLocked[3])
{
var oldShadowMap = shadow.ShadowMap;
shadow.ShadowMap = graphicsService.RenderTargetPool.Obtain2D(new RenderTargetFormat(oldShadowMap));
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
graphicsDevice.Clear(Color.White);
var spriteBatch = graphicsService.GetSpriteBatch();
spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
for (int cascade = 0; cascade < shadow.NumberOfCascades; cascade++)
{
if (shadow.IsCascadeLocked[cascade])
{
var viewport = GetViewport(shadow, cascade);
var rectangle = new Rectangle(viewport.X, viewport.Y, viewport.Width, viewport.Height);
spriteBatch.Draw(oldShadowMap, rectangle, rectangle, Color.White);
}
}
spriteBatch.End();
graphicsService.RenderTargetPool.Recycle(oldShadowMap);
}
else
{
graphicsDevice.SetRenderTarget(shadow.ShadowMap);
graphicsDevice.Clear(Color.White);
}
context.RenderTarget = shadow.ShadowMap;
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
graphicsDevice.BlendState = BlendState.Opaque;
context.ReferenceNode = lightNode;
context.Object = shadow;
context.ShadowNear = 0; // Obsolete: Only kept for backward compatibility.
bool shadowMapContainsSomething = false;
for (int split = 0; split < shadow.NumberOfCascades; split++)
{
if (shadow.IsCascadeLocked[split])
{
continue;
}
context.Data[RenderContextKeys.ShadowTileIndex] = CubeMapShadowMapRenderer.BoxedIntegers[split];
// near/far of this split.
float near = _csmSplitDistances[split];
float far = Math.Max(_csmSplitDistances[split + 1], near + Numeric.EpsilonF);
// Create a view volume for this split.
_splitVolume.SetFieldOfView(fieldOfViewY, aspectRatio, near, far);
// Find the bounding sphere of the split camera frustum.
Vector3 center;
float radius;
GetBoundingSphere(_splitVolume, out center, out radius);
// Extend radius to get enough border for filtering.
int shadowMapSize = shadow.ShadowMap.Height;
// We could extend by (ShadowMapSize + BorderTexels) / ShadowMapSize;
// Add at least 1 texel. (This way, shadow mask shader can clamp uv to
// texture rect in without considering half texel border to avoid sampling outside..)
radius *= (float)(shadowMapSize + 1) / shadowMapSize;
// Convert center to light space.
Pose lightPose = lightNode.PoseWorld;
center = cameraPose.ToWorldPosition(center);
center = lightPose.ToLocalPosition(center);
// Snap center to texel positions to avoid shadow swimming.
SnapPositionToTexels(ref center, 2 * radius, shadowMapSize);
// Convert center back to world space.
center = lightPose.ToWorldPosition(center);
Matrix orientation = lightPose.Orientation;
Vector3 backward = orientation.GetColumn(2);
var orthographicProjection = (OrthographicProjection)_orthographicCameraNode.Camera.Projection;
// Create a tight orthographic frustum around the cascade's bounding sphere.
orthographicProjection.SetOffCenter(-radius, radius, -radius, radius, 0, 2 * radius);
Vector3 cameraPosition = center + radius * backward;
Pose frustumPose = new Pose(cameraPosition, orientation);
Pose view = frustumPose.Inverse;
shadow.ViewProjections[split] = (Matrix)view * orthographicProjection;
// Convert depth bias from "texel" to light space [0, 1] depth.
// Minus sign to move receiver depth closer to light. Divide by depth to normalize.
float unitsPerTexel = orthographicProjection.Width / shadow.ShadowMap.Height;
shadow.EffectiveDepthBias[split] = -shadow.DepthBias[split] * unitsPerTexel / orthographicProjection.Depth;
// Convert normal offset from "texel" to world space.
shadow.EffectiveNormalOffset[split] = shadow.NormalOffset[split] * unitsPerTexel;
// For rendering the shadow map, move near plane back by MinLightDistance
// to catch occluders in front of the cascade.
orthographicProjection.Near = -shadow.MinLightDistance;
_orthographicCameraNode.PoseWorld = frustumPose;
// Set a viewport to render a tile in the texture atlas.
graphicsDevice.Viewport = GetViewport(shadow, split);
context.Viewport = graphicsDevice.Viewport;
shadowMapContainsSomething |= RenderCallback(context);
}
// Recycle shadow map if empty.
if (!shadowMapContainsSomething)
{
graphicsService.RenderTargetPool.Recycle(shadow.ShadowMap);
shadow.ShadowMap = null;
}
}
graphicsDevice.SetRenderTarget(null);
savedRenderState.Restore();
context.CameraNode = cameraNode;
context.ShadowNear = float.NaN;
context.Technique = null;
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.ReferenceNode = originalReferenceNode;
context.Object = null;
context.Data[RenderContextKeys.ShadowTileIndex] = null;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
// Blur source texture.
var tempFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
var blurredImage = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
context.RenderTarget = blurredImage;
context.Viewport = new Viewport(0, 0, blurredImage.Width, blurredImage.Height);
Blur.Process(context);
// Unsharp masking.
context.RenderTarget = target;
context.Viewport = viewport;
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sharpnessParameter.SetValue(Sharpness);
_sourceTextureParameter.SetValue(source);
_blurredTextureParameter.SetValue(blurredImage);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
_blurredTextureParameter.SetValue((Texture2D)null);
GraphicsService.RenderTargetPool.Recycle(blurredImage);
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
/// <summary>
/// Computes the intersection of <see cref="MeshNode"/>s.
/// </summary>
/// <param name="meshNodePairs">
/// A collection of <see cref="MeshNode"/> pairs.The renderer computes the intersection volume
/// of each pair.
/// </param>
/// <param name="color">The diffuse color used for the intersection.</param>
/// <param name="alpha">The opacity of the intersection.</param>
/// <param name="maxConvexity">
/// The maximum convexity of the submeshes. A convex mesh has a convexity of 1. A concave mesh
/// has a convexity greater than 1. Convexity is the number of layers required for depth peeling
/// (= the number of front face layers when looking at the object).
/// </param>
/// <param name="context">The render context.</param>
/// <remarks>
/// <para>
/// This method renders an off-screen image (color and depth) of the intersection volume. This
/// operation destroys the currently set render target and depth/stencil buffer.
/// </para>
/// </remarks>
/// <exception cref="ObjectDisposedException">
/// The <see cref="IntersectionRenderer"/> has already been disposed.
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="meshNodePairs"/> or <see cref="context"/> is
/// <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// The convexity must be greater than 0.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Graphics service is not set.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Wrong graphics device.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Scene is not set.
/// </exception>
/// <exception cref="GraphicsException">
/// Invalid render context: Camera node needs to be set in render context.
/// </exception>
public void ComputeIntersection(IEnumerable <Pair <MeshNode> > meshNodePairs,
Vector3F color, float alpha, float maxConvexity, RenderContext context)
{
if (_isDisposed)
{
throw new ObjectDisposedException("IntersectionRenderer has already been disposed.");
}
if (meshNodePairs == null)
{
throw new ArgumentNullException("meshNodePairs");
}
if (maxConvexity < 1)
{
throw new ArgumentOutOfRangeException("maxConvexity", "The max convexity must be greater than 0.");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
if (context.GraphicsService == null)
{
throw new GraphicsException("Invalid render context: Graphics service is not set.");
}
if (_graphicsService != context.GraphicsService)
{
throw new GraphicsException("Invalid render context: Wrong graphics service.");
}
if (context.CameraNode == null)
{
throw new GraphicsException("Camera node needs to be set in render context.");
}
if (context.Scene == null)
{
throw new GraphicsException("A scene needs to be set in the render context.");
}
// Create 2 ordered pairs for each unordered pair.
_pairs.Clear();
foreach (var pair in meshNodePairs)
{
if (pair.First == null || pair.Second == null)
{
continue;
}
// Frustum culling.
if (!context.Scene.HaveContact(pair.First, context.CameraNode))
{
continue;
}
if (!context.Scene.HaveContact(pair.Second, context.CameraNode))
{
continue;
}
_pairs.Add(new Pair <MeshNode, MeshNode>(pair.First, pair.Second));
_pairs.Add(new Pair <MeshNode, MeshNode>(pair.Second, pair.First));
}
var renderTargetPool = _graphicsService.RenderTargetPool;
if (_pairs.Count == 0)
{
renderTargetPool.Recycle(_intersectionImage);
_intersectionImage = null;
return;
}
// Color and alpha are applied in RenderIntersection().
_color = color;
_alpha = alpha;
var graphicsDevice = _graphicsService.GraphicsDevice;
// Save original render states.
var originalBlendState = graphicsDevice.BlendState;
var originalDepthStencilState = graphicsDevice.DepthStencilState;
var originalRasterizerState = graphicsDevice.RasterizerState;
var originalScissorRectangle = graphicsDevice.ScissorRectangle;
// Get offscreen render targets.
var viewport = context.Viewport;
viewport.X = 0;
viewport.Y = 0;
viewport.Width = (int)(viewport.Width / DownsampleFactor);
viewport.Height = (int)(viewport.Height / DownsampleFactor);
var renderTargetFormat = new RenderTargetFormat(viewport.Width, viewport.Height, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
// Try to reuse any existing render targets.
// (Usually they are recycled in RenderIntersection()).
var currentScene = _intersectionImage;
if (currentScene == null || !renderTargetFormat.IsCompatibleWith(currentScene))
{
currentScene.SafeDispose();
currentScene = renderTargetPool.Obtain2D(renderTargetFormat);
}
var lastScene = renderTargetPool.Obtain2D(renderTargetFormat);
// Set shared effect parameters.
var cameraNode = context.CameraNode;
var view = (Matrix)cameraNode.View;
var projection = cameraNode.Camera.Projection;
var near = projection.Near;
var far = projection.Far;
_parameterViewportSize.SetValue(new Vector2(viewport.Width, viewport.Height));
// The DepthEpsilon has to be tuned if depth peeling does not work because
// of numerical problems equality z comparisons.
_parameterCameraParameters.SetValue(new Vector3(near, far - near, 0.0000001f));
_parameterView.SetValue(view);
_parameterProjection.SetValue((Matrix)projection);
var defaultTexture = _graphicsService.GetDefaultTexture2DBlack();
// Handle all pairs.
bool isFirstPass = true;
while (true)
{
// Find a mesh node A and all mesh nodes to which it needs to be clipped.
MeshNode meshNodeA = null;
_partners.Clear();
for (int i = 0; i < _pairs.Count; i++)
{
var pair = _pairs[i];
if (pair.First == null)
{
continue;
}
if (meshNodeA == null)
{
meshNodeA = pair.First;
}
if (pair.First == meshNodeA)
{
_partners.Add(pair.Second);
// Remove this pair.
_pairs[i] = new Pair <MeshNode, MeshNode>();
}
}
// Abort if we have handled all pairs.
if (meshNodeA == null)
{
break;
}
var worldTransformA = (Matrix)(meshNodeA.PoseWorld * Matrix44F.CreateScale(meshNodeA.ScaleWorld));
if (EnableScissorTest)
{
// Scissor rectangle of A.
var scissorA = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, meshNodeA);
// Union of scissor rectangles of partners.
Rectangle partnerRectangle = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, _partners[0]);
for (int i = 1; i < _partners.Count; i++)
{
var a = GraphicsHelper.GetScissorRectangle(context.CameraNode, viewport, _partners[i]);
partnerRectangle = Rectangle.Union(partnerRectangle, a);
}
// Use intersection of A and partners.
graphicsDevice.ScissorRectangle = Rectangle.Intersect(scissorA, partnerRectangle);
// We store the union of all scissor rectangles for use in RenderIntersection().
if (isFirstPass)
{
_totalScissorRectangle = graphicsDevice.ScissorRectangle;
}
else
{
_totalScissorRectangle = Rectangle.Union(_totalScissorRectangle, graphicsDevice.ScissorRectangle);
}
}
// Depth peeling of A.
for (int layer = 0; layer < maxConvexity; layer++)
{
// Set and clear render target.
graphicsDevice.SetRenderTarget(currentScene);
graphicsDevice.Clear(new Color(1, 1, 1, 0)); // RGB = "a large depth", A = "empty area"
// Render a depth layer of A.
graphicsDevice.DepthStencilState = DepthStencilStateWriteLess;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullCounterClockwiseScissor : RasterizerState.CullCounterClockwise;
_parameterWorld.SetValue(worldTransformA);
_parameterTexture.SetValue((layer == 0) ? defaultTexture : lastScene);
_passPeel.Apply();
foreach (var submesh in meshNodeA.Mesh.Submeshes)
{
submesh.Draw();
}
// Render partners to set stencil.
graphicsDevice.DepthStencilState = DepthStencilStateOnePassStencilFail;
graphicsDevice.BlendState = BlendStateNoWrite;
graphicsDevice.RasterizerState = EnableScissorTest ? CullNoneScissor : RasterizerState.CullNone;
foreach (var partner in _partners)
{
_parameterWorld.SetValue((Matrix)(partner.PoseWorld * Matrix44F.CreateScale(partner.ScaleWorld)));
_passMark.Apply();
foreach (var submesh in partner.Mesh.Submeshes)
{
submesh.Draw();
}
}
// Clear depth buffer. Leave stencil buffer unchanged.
graphicsDevice.Clear(ClearOptions.DepthBuffer, new Color(0, 1, 0), 1, 0);
// Render A to compute lighting.
graphicsDevice.DepthStencilState = DepthStencilStateStencilNotEqual0;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullCounterClockwiseScissor : RasterizerState.CullCounterClockwise;
_parameterWorld.SetValue(worldTransformA);
_passDraw.Apply();
foreach (var submesh in meshNodeA.Mesh.Submeshes)
{
submesh.Draw();
}
// Combine last intersection image with current.
if (!isFirstPass)
{
graphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.RasterizerState = EnableScissorTest ? CullNoneScissor : RasterizerState.CullNone;
_parameterTexture.SetValue(lastScene);
_passCombine.Apply();
graphicsDevice.DrawFullScreenQuad();
}
isFirstPass = false;
// ----- Swap render targets.
MathHelper.Swap(ref lastScene, ref currentScene);
}
}
// Store final images for RenderIntersection.
_intersectionImage = lastScene;
// Scale scissor rectangle back to full-screen resolution.
if (DownsampleFactor > 1)
{
_totalScissorRectangle.X = (int)(_totalScissorRectangle.X * DownsampleFactor);
_totalScissorRectangle.Y = (int)(_totalScissorRectangle.Y * DownsampleFactor);
_totalScissorRectangle.Width = (int)(_totalScissorRectangle.Width * DownsampleFactor);
_totalScissorRectangle.Height = (int)(_totalScissorRectangle.Height * DownsampleFactor);
}
// Restore original render state.
graphicsDevice.BlendState = originalBlendState ?? BlendState.Opaque;
graphicsDevice.DepthStencilState = originalDepthStencilState ?? DepthStencilState.Default;
graphicsDevice.RasterizerState = originalRasterizerState ?? RasterizerState.CullCounterClockwise;
graphicsDevice.ScissorRectangle = originalScissorRectangle;
renderTargetPool.Recycle(currentScene);
_partners.Clear();
_pairs.Clear();
}
protected override void OnRender(RenderContext context)
{
if (ActiveCameraNode == null)
{
return;
}
var renderTargetPool = GraphicsService.RenderTargetPool;
var graphicsDevice = GraphicsService.GraphicsDevice;
var originalRenderTarget = context.RenderTarget;
var fullViewport = context.Viewport;
// Get a render target for the first camera. Use half the width and height.
int halfWidth = fullViewport.Width / 2;
int halfHeight = fullViewport.Height / 2;
var format = new RenderTargetFormat(context.RenderTarget)
{
Width = halfWidth,
Height = halfHeight
};
var renderTarget0 = renderTargetPool.Obtain2D(format);
var renderTarget1 = renderTargetPool.Obtain2D(format);
var renderTarget2 = renderTargetPool.Obtain2D(format);
var viewport0 = new Viewport(0, 0, halfWidth, halfHeight);
var viewport1 = new Viewport(halfWidth, 0, halfWidth, halfHeight);
var viewport2 = new Viewport(0, halfHeight, halfWidth, halfHeight);
context.Scene = Scene;
context.CameraNode = ActiveCameraNode;
context.LodCameraNode = context.CameraNode;
context.LodHysteresis = 0.5f;
// Reduce detail level by increasing the LOD bias.
context.LodBias = 2.0f;
for (int i = 0; i < 4; i++)
{
if (i == 0)
{
// TOP, LEFT
context.RenderTarget = renderTarget0;
context.Viewport = new Viewport(0, 0, viewport0.Width, viewport0.Height);
context.LodBlendingEnabled = false;
}
else if (i == 1)
{
// TOP, RIGHT
context.RenderTarget = renderTarget1;
context.Viewport = new Viewport(0, 0, viewport1.Width, viewport1.Height);
context.LodBlendingEnabled = true;
}
else if (i == 2)
{
// BOTTOM, LEFT
context.RenderTarget = renderTarget2;
context.Viewport = new Viewport(0, 0, viewport2.Width, viewport2.Height);
context.LodBlendingEnabled = false;
}
else
{
// BOTTOM, RIGHT
context.RenderTarget = originalRenderTarget;
context.Viewport = new Viewport(fullViewport.X + halfWidth, fullViewport.Y + halfHeight, halfWidth, halfHeight);
context.LodBlendingEnabled = true;
}
var sceneQuery = Scene.Query <SceneQueryWithLodBlending>(context.CameraNode, context);
if (i == 0 || i == 1)
{
// TOP
for (int j = 0; j < sceneQuery.RenderableNodes.Count; j++)
{
if (sceneQuery.RenderableNodes[j].UserFlags == 1)
{
sceneQuery.RenderableNodes[j] = null;
}
}
}
else
{
// BOTTOM
for (int j = 0; j < sceneQuery.RenderableNodes.Count; j++)
{
if (sceneQuery.RenderableNodes[j].UserFlags == 2)
{
sceneQuery.RenderableNodes[j] = null;
}
}
}
RenderScene(sceneQuery, context, true, true, true, true);
sceneQuery.Reset();
}
// ----- Copy screens.
// Copy the previous screens from the temporary render targets into the back buffer.
context.Viewport = fullViewport;
graphicsDevice.Viewport = fullViewport;
SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone);
SpriteBatch.Draw(renderTarget0, viewport0.Bounds, Color.White);
SpriteBatch.Draw(renderTarget1, viewport1.Bounds, Color.White);
SpriteBatch.Draw(renderTarget2, viewport2.Bounds, Color.White);
SpriteBatch.End();
renderTargetPool.Recycle(renderTarget0);
renderTargetPool.Recycle(renderTarget1);
renderTargetPool.Recycle(renderTarget2);
context.Scene = null;
context.CameraNode = null;
context.LodCameraNode = null;
context.RenderPass = null;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// Get velocity buffers from render context.
object value0, value1;
context.Data.TryGetValue(RenderContextKeys.VelocityBuffer, out value0);
context.Data.TryGetValue(RenderContextKeys.LastVelocityBuffer, out value1);
var velocityBuffer0 = value0 as Texture2D;
var velocityBuffer1 = value1 as Texture2D;
if (velocityBuffer0 == null)
{
throw new GraphicsException("VelocityBuffer needs to be set in the render context (RenderContext.Data[\"VelocityBuffer\"]).");
}
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
if (!SoftenEdges)
{
// ----- Motion blur using one or two velocity buffers
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_numberOfSamplesParameter.SetValue((int)NumberOfSamples);
_velocityTextureParameter.SetValue(velocityBuffer0);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer0.Format))
{
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
if (velocityBuffer1 == null || !UseLastVelocityBuffer)
{
_singlePass.Apply();
}
else
{
_velocityTexture2Parameter.SetValue(velocityBuffer1);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer1.Format))
{
graphicsDevice.SamplerStates[2] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[2] = SamplerState.LinearClamp;
}
_dualPass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
}
else
{
// ----- Advanced motion blur (based on paper "A Reconstruction Filter for Plausible Motion Blur")
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
// The width/height of the current velocity input.
int sourceWidth;
int sourceHeight;
if (context.RenderTarget != null)
{
sourceWidth = velocityBuffer0.Width;
sourceHeight = velocityBuffer0.Height;
}
else
{
sourceWidth = context.Viewport.Width;
sourceHeight = context.Viewport.Height;
}
// The downsampled target width/height.
int targetWidth = Math.Max(1, (int)(sourceWidth / MaxBlurRadius));
int targetHeight = Math.Max(1, (int)(sourceHeight / MaxBlurRadius));
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.None);
RenderTarget2D temp0 = renderTargetPool.Obtain2D(tempFormat);
RenderTarget2D temp1 = renderTargetPool.Obtain2D(tempFormat);
// ----- Downsample max velocity buffer
_effect.CurrentTechnique = _effect.Techniques[0];
_maxBlurRadiusParameter.SetValue(new Vector2(MaxBlurRadius / sourceWidth, MaxBlurRadius / sourceHeight));
Texture2D currentVelocityBuffer = velocityBuffer0;
bool isFinalPass;
do
{
// Downsample to this target size.
sourceWidth = Math.Max(targetWidth, sourceWidth / 2);
sourceHeight = Math.Max(targetHeight, sourceHeight / 2);
// Is this the final downsample pass?
isFinalPass = (sourceWidth <= targetWidth && sourceHeight <= targetHeight);
// Get temporary render target for intermediate steps.
RenderTarget2D temp = null;
if (!isFinalPass)
{
tempFormat.Width = sourceWidth;
tempFormat.Height = sourceHeight;
temp = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
}
graphicsDevice.SetRenderTarget(isFinalPass ? temp0 : temp);
_sourceSizeParameter.SetValue(new Vector2(sourceWidth * 2, sourceHeight * 2));
_viewportSizeParameter.SetValue(new Vector2(sourceWidth, sourceHeight));
_velocityTextureParameter.SetValue(currentVelocityBuffer);
if (TextureHelper.IsFloatingPointFormat(currentVelocityBuffer.Format))
{
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
if (currentVelocityBuffer == velocityBuffer0)
{
_downsampleMaxFromFloatBufferParameter.Apply();
}
else
{
_downsampleMaxParameter.Apply();
}
graphicsDevice.DrawFullScreenQuad();
if (currentVelocityBuffer != velocityBuffer0)
{
GraphicsService.RenderTargetPool.Recycle((RenderTarget2D)currentVelocityBuffer);
}
currentVelocityBuffer = temp;
} while (!isFinalPass);
// ----- Compute max velocity of neighborhood.
graphicsDevice.SetRenderTarget(temp1);
_velocityTextureParameter.SetValue(temp0);
_neighborMaxPass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(temp0);
// Compute motion blur.
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_numberOfSamplesParameter.SetValue((int)NumberOfSamples);
_velocityTextureParameter.SetValue(velocityBuffer0);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer0.Format))
{
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
_velocityTexture2Parameter.SetValue(temp1);
if (TextureHelper.IsFloatingPointFormat(temp1.Format))
{
graphicsDevice.SamplerStates[2] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[2] = SamplerState.LinearClamp;
}
_gBuffer0Parameter.SetValue(context.GBuffer0);
_jitterTextureParameter.SetValue(_jitterTexture);
_softZExtentParameter.SetValue(0.01f / context.CameraNode.Camera.Projection.Far); // 1 mm to 10 cm.
_softEdgePass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
_velocityTextureParameter.SetValue((Texture2D)null);
_velocityTexture2Parameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp1);
}
}
protected override void OnProcess(RenderContext context)
{
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
{
throw new GraphicsException("Source texture format must not be a floating-point format.");
}
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
int downsampledWidth = Math.Max(1, source.Width / DownsampleFactor);
int downsampledHeight = Math.Max(1, source.Height / DownsampleFactor);
// ----- Get temporary render targets.
var bloomFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, SurfaceFormat.Color, DepthFormat.None);
RenderTarget2D bloom0 = renderTargetPool.Obtain2D(bloomFormat);
RenderTarget2D bloom1 = renderTargetPool.Obtain2D(bloomFormat);
// ----- Downsample scene to bloom0.
context.RenderTarget = bloom0;
context.Viewport = new Viewport(0, 0, bloom0.Width, bloom0.Height);
_downsampleFilter.Process(context);
// ----- Create bloom image
graphicsDevice.SetRenderTarget(bloom1);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_bloomThresholdParameter.SetValue(Threshold);
_bloomIntensityParameter.SetValue(Intensity);
_bloomSaturationParameter.SetValue(Saturation);
_sceneTextureParameter.SetValue(bloom0);
_brightnessPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// bloom0 is not needed anymore.
renderTargetPool.Recycle(bloom0);
// We make a two-pass blur, so source can be equal to target.
context.SourceTexture = bloom1;
context.RenderTarget = bloom1;
_blur.Process(context);
// ----- Combine scene and bloom.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sceneTextureParameter.SetValue(source);
_bloomTextureParameter.SetValue(bloom1);
_combinePass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Clean-up
_sceneTextureParameter.SetValue((Texture2D)null);
_bloomTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(bloom1);
// Restore original context.
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
protected override void OnProcess(RenderContext context)
{
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
throw new GraphicsException("Source texture format must not be a floating-point format.");
var graphicsDevice = GraphicsService.GraphicsDevice;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
_pixelSizeParameter.SetValue(new Vector2(1.0f / targetWidth, 1.0f / targetHeight));
_viewportSizeParameter.SetValue(new Vector2(targetWidth, targetHeight));
// Cannot use render target from pool because we need a stencil buffer.
//var edgeRenderTarget = graphicsService.RenderTargetPool.Obtain2D(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
//var blendRenderTarget = graphicsService.RenderTargetPool.Obtain2D(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.None);
var edgeRenderTarget = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
var blendRenderTarget = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
//graphicsDevice.DepthStencilState = _stencilStateReplace;
graphicsDevice.SetRenderTarget(edgeRenderTarget);
// Clear color + stencil buffer.
//graphicsDevice.Clear(ClearOptions.Target | ClearOptions.Stencil, new Color(0, 0, 0, 0), 1, 0);
graphicsDevice.Clear(ClearOptions.Target, new Color(0, 0, 0, 0), 1, 0);
_sourceTextureParameter.SetValue(context.SourceTexture);
_lumaEdgeDetectionPass.Apply();
graphicsDevice.DrawFullScreenQuad();
//graphicsDevice.DepthStencilState = _stencilStateKeep;
graphicsDevice.SetRenderTarget(blendRenderTarget);
//graphicsDevice.Clear(ClearOptions.Target, new Color(0, 0, 0, 0), 1, 1);
_edgesTextureParameter.SetValue(edgeRenderTarget);
_areaLookupTextureParameter.SetValue(_areaLookupTexture);
_searchLookupTextureParameter.SetValue(_searchLookupTexture);
_blendWeightCalculationPass.Apply();
graphicsDevice.DrawFullScreenQuad();
//graphicsDevice.DepthStencilState = DepthStencilState.None;
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_blendTextureParameter.SetValue(blendRenderTarget);
_neighborhoodBlendingPass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
_edgesTextureParameter.SetValue((Texture2D)null);
_blendTextureParameter.SetValue((Texture2D)null);
GraphicsService.RenderTargetPool.Recycle(blendRenderTarget);
GraphicsService.RenderTargetPool.Recycle(edgeRenderTarget);
}
/// <summary>
/// Renders the environment maps for the image-based lights.
/// </summary>
/// <remarks>
/// This method uses the current DeferredGraphicsScreen to render new environment maps at
/// runtime. The DeferredGraphicsScreen has a SceneCaptureRenderer which we can use to
/// capture environment maps of the current scene.
/// To capture new environment maps the flag _updateEnvironmentMaps must be set to true.
/// When this flag is set, SceneCaptureNodes are added to the scene. When the graphics
/// screen calls the SceneCaptureRenderer the next time, the new environment maps will be
/// captured.
/// The flag _updateEnvironmentMaps remains true until the new environment maps are available.
/// This method checks the SceneCaptureNode.LastFrame property to check if new environment maps
/// have been computed. Usually, the environment maps will be available in the next frame.
/// (However, the XNA Game class can skip graphics rendering if the game is running slowly.
/// Then we would have to wait more than 1 frame.)
/// When environment maps are being rendered, the image-based lights are disabled to capture
/// only the scene with ambient and directional lights. Dynamic objects are also disabled
/// to capture only the static scene.
/// </remarks>
private void UpdateEnvironmentMaps()
{
if (!_updateEnvironmentMaps)
return;
// One-time initializations:
if (_sceneCaptureNodes[0] == null)
{
// Create cube maps and scene capture nodes.
// (Note: A cube map size of 256 is enough for surfaces with a specular power
// in the range [0, 200000].)
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
var renderTargetCube = new RenderTargetCube(
GraphicsService.GraphicsDevice,
256,
true,
SurfaceFormat.Color,
DepthFormat.None);
var renderToTexture = new RenderToTexture { Texture = renderTargetCube };
var projection = new PerspectiveProjection();
projection.SetFieldOfView(ConstantsF.PiOver2, 1, 1, 100);
_sceneCaptureNodes[i] = new SceneCaptureNode(renderToTexture)
{
CameraNode = new CameraNode(new Camera(projection))
{
PoseWorld = _lightNodes[i].PoseWorld,
},
};
_imageBasedLights[i].Texture = renderTargetCube;
}
// We use a ColorEncoder to encode a HDR image in a normal Color texture.
_colorEncoder = new ColorEncoder(GraphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = ColorEncoding.Rgbm,
};
// The SceneCaptureRenderer has a render callback which defines what is rendered
// into the scene capture render targets.
_graphicsScreen.SceneCaptureRenderer.RenderCallback = context =>
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// Get scene nodes which are visible by the current camera.
CustomSceneQuery sceneQuery = context.Scene.Query<CustomSceneQuery>(context.CameraNode, context);
// The final image has to be rendered into this render target.
var ldrTarget = context.RenderTarget;
// Use an intermediate HDR render target with the same resolution as the final target.
var format = new RenderTargetFormat(ldrTarget)
{
SurfaceFormat = SurfaceFormat.HdrBlendable,
DepthStencilFormat = DepthFormat.Depth24Stencil8
};
var hdrTarget = renderTargetPool.Obtain2D(format);
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
// Render scene (without post-processing, without lens flares, no debug rendering, no reticle).
_graphicsScreen.RenderScene(sceneQuery, context, false, false, false, false);
// Convert the HDR image to RGBM image.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Clean up.
renderTargetPool.Recycle(hdrTarget);
context.RenderTarget = ldrTarget;
};
}
if (_sceneCaptureNodes[0].Parent == null)
{
// Add the scene capture nodes to the scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
_graphicsScreen.Scene.Children.Add(_sceneCaptureNodes[i]);
// Remember the old time stamp of the nodes.
_oldEnvironmentMapTimeStamp = _sceneCaptureNodes[0].LastFrame;
// Disable all lights except ambient and directional lights.
// We do not capture the image-based lights or any other lights (e.g. point lights)
// in the cube map.
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType<LightNode>())
lightNode.IsEnabled = (lightNode.Light is AmbientLight) || (lightNode.Light is DirectionalLight);
// Disable dynamic objects.
foreach (var node in _graphicsScreen.Scene.GetDescendants())
if (node is MeshNode || node is LodGroupNode)
if (!node.IsStatic)
node.IsEnabled = false;
}
else
{
// The scene capture nodes are part of the scene. Check if they have been
// updated.
if (_sceneCaptureNodes[0].LastFrame != _oldEnvironmentMapTimeStamp)
{
// We have new environment maps. Restore the normal scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
_graphicsScreen.Scene.Children.Remove(_sceneCaptureNodes[i]);
_updateEnvironmentMaps = false;
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType<LightNode>())
lightNode.IsEnabled = true;
foreach (var node in _graphicsScreen.Scene.GetDescendants())
if (node is MeshNode || node is LodGroupNode)
if (!node.IsStatic)
node.IsEnabled = true;
}
}
}
public void Render(IList <SceneNode> lights, RenderContext context)
{
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
var target = context.RenderTarget;
var viewport = context.Viewport;
var width = viewport.Width;
var height = viewport.Height;
// Render ambient occlusion info into a render target.
var aoRenderTarget = renderTargetPool.Obtain2D(new RenderTargetFormat(
width / _ssaoFilter.DownsampleFactor,
height / _ssaoFilter.DownsampleFactor,
false,
SurfaceFormat.Color,
DepthFormat.None));
// PostProcessors require that context.SourceTexture is set. But since
// _ssaoFilter.CombineWithSource is set to false, the SourceTexture is not
// used and we can set it to anything except null.
context.SourceTexture = aoRenderTarget;
context.RenderTarget = aoRenderTarget;
context.Viewport = new Viewport(0, 0, aoRenderTarget.Width, aoRenderTarget.Height);
_ssaoFilter.Process(context);
context.SourceTexture = null;
// The light buffer consists of two full-screen render targets into which we
// render the accumulated diffuse and specular light intensities.
var lightBufferFormat = new RenderTargetFormat(width, height, false, SurfaceFormat.HdrBlendable, DepthFormat.Depth24Stencil8);
context.LightBuffer0 = renderTargetPool.Obtain2D(lightBufferFormat);
context.LightBuffer1 = renderTargetPool.Obtain2D(lightBufferFormat);
// Set the device render target to the light buffer.
_renderTargetBindings[0] = new RenderTargetBinding(context.LightBuffer0); // Diffuse light accumulation
_renderTargetBindings[1] = new RenderTargetBinding(context.LightBuffer1); // Specular light accumulation
graphicsDevice.SetRenderTargets(_renderTargetBindings);
context.RenderTarget = context.LightBuffer0;
context.Viewport = graphicsDevice.Viewport;
// Clear the light buffer. (The alpha channel is not used. We can set it to anything.)
graphicsDevice.Clear(new Color(0, 0, 0, 255));
// Render all lights into the light buffers.
LightRenderer.Render(lights, context);
// Render the ambient occlusion texture using multiplicative blending.
// This will darken the light buffers depending on the ambient occlusion term.
// Note: Theoretically, this should be done after the ambient light renderer
// and before the directional light renderer because AO should not affect
// directional lights. But doing this here has more impact.
context.SourceTexture = aoRenderTarget;
graphicsDevice.BlendState = GraphicsHelper.BlendStateMultiply;
_copyFilter.Process(context);
// Clean up.
graphicsService.RenderTargetPool.Recycle(aoRenderTarget);
context.RenderTarget = target;
context.Viewport = viewport;
#if MONOGAME
graphicsDevice.SetRenderTarget(null); // Cannot clear _renderTargetbindings if it is still set in the MonoGame device.
#endif
_renderTargetBindings[0] = new RenderTargetBinding();
_renderTargetBindings[1] = new RenderTargetBinding();
}
public override void Render(IList <SceneNode> nodes, RenderContext context, RenderOrder order)
{
if (nodes == null)
{
throw new ArgumentNullException("nodes");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
{
return;
}
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var renderTargetPool = graphicsService.RenderTargetPool;
int frame = context.Frame;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
var originalRenderTarget = context.RenderTarget;
var originalViewport = context.Viewport;
var originalCameraNode = context.CameraNode;
var originalLodCameraNode = context.LodCameraNode;
var originalReferenceNode = context.ReferenceNode;
try
{
// Use foreach instead of for-loop to catch InvalidOperationExceptions in
// case the collection is modified.
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i] as SceneCaptureNode;
if (node == null)
{
continue;
}
// Update each node only once per frame.
if (node.LastFrame == frame)
{
continue;
}
node.LastFrame = frame;
var cameraNode = node.CameraNode;
if (cameraNode == null)
{
continue;
}
var texture = node.RenderToTexture.Texture;
if (texture == null)
{
continue;
}
// RenderToTexture instances can be shared. --> Update them only once per frame.
if (node.RenderToTexture.LastFrame == frame)
{
continue;
}
context.CameraNode = cameraNode;
context.LodCameraNode = cameraNode;
context.ReferenceNode = node;
var renderTarget2D = texture as RenderTarget2D;
var projection = cameraNode.Camera.Projection;
if (renderTarget2D != null)
{
context.RenderTarget = renderTarget2D;
context.Viewport = new Viewport(0, 0, renderTarget2D.Width, renderTarget2D.Height);
RenderCallback(context);
// Update other properties of RenderToTexture.
node.RenderToTexture.LastFrame = frame;
node.RenderToTexture.TextureMatrix = GraphicsHelper.ProjectorBiasMatrix
* projection
* cameraNode.PoseWorld.Inverse;
continue;
}
var renderTargetCube = texture as RenderTargetCube;
if (renderTargetCube != null)
{
var format = new RenderTargetFormat(renderTargetCube)
{
Mipmap = false
};
renderTarget2D = renderTargetPool.Obtain2D(format);
context.RenderTarget = renderTarget2D;
context.Viewport = new Viewport(0, 0, renderTarget2D.Width, renderTarget2D.Height);
if (_spriteBatch == null)
{
_spriteBatch = graphicsService.GetSpriteBatch();
}
var perspectiveProjection = projection as PerspectiveProjection;
if (perspectiveProjection == null)
{
throw new GraphicsException("The camera of the SceneCaptureNode must use a perspective projection.");
}
// ReSharper disable CompareOfFloatsByEqualityOperator
if (perspectiveProjection.FieldOfViewX != ConstantsF.PiOver2 ||
perspectiveProjection.FieldOfViewY != ConstantsF.PiOver2)
{
perspectiveProjection.SetFieldOfView(ConstantsF.PiOver2, 1, projection.Near, projection.Far);
}
// ReSharper restore CompareOfFloatsByEqualityOperator
var originalCameraPose = cameraNode.PoseWorld;
for (int side = 0; side < 6; side++)
{
// Rotate camera to face the current cube map face.
//var cubeMapFace = (CubeMapFace)side;
// AMD problem: If we generate in normal order, the last cube map face contains
// garbage when mipmaps are created.
var cubeMapFace = (CubeMapFace)(5 - side);
var position = cameraNode.PoseWorld.Position;
cameraNode.View = Matrix.CreateLookAt(
position,
position + originalCameraPose.ToWorldDirection(GraphicsHelper.GetCubeMapForwardDirection(cubeMapFace)),
originalCameraPose.ToWorldDirection(GraphicsHelper.GetCubeMapUpDirection(cubeMapFace)));
RenderCallback(context);
// Copy RGBM texture into cube map face.
graphicsDevice.SetRenderTarget(renderTargetCube, cubeMapFace);
_spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque, null, null, null);
_spriteBatch.Draw(renderTarget2D, new Vector2(0, 0), Color.White);
_spriteBatch.End();
}
cameraNode.PoseWorld = originalCameraPose;
renderTargetPool.Recycle(renderTarget2D);
// Update other properties of RenderToTexture.
node.RenderToTexture.LastFrame = frame;
node.RenderToTexture.TextureMatrix = GraphicsHelper.ProjectorBiasMatrix
* projection
* cameraNode.PoseWorld.Inverse;
continue;
}
throw new GraphicsException(
"SceneCaptureNode.RenderToTexture.Texture is invalid. The texture must be a RenderTarget2D or RenderTargetCube.");
}
}
catch (InvalidOperationException exception)
{
throw new GraphicsException(
"InvalidOperationException was raised in SceneCaptureRenderer.Render(). "
+ "This can happen if a SceneQuery instance that is currently in use is modified in the "
+ "RenderCallback. --> Use different SceneQuery types in the method which calls "
+ "SceneCaptureRenderer.Render() and in the RenderCallback method.",
exception);
}
graphicsDevice.SetRenderTarget(null);
savedRenderState.Restore();
context.RenderTarget = originalRenderTarget;
context.Viewport = originalViewport;
context.CameraNode = originalCameraNode;
context.LodCameraNode = originalLodCameraNode;
context.ReferenceNode = originalReferenceNode;
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var cameraNode = context.CameraNode;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
var sourceSize = new Vector2F(source.Width, source.Height);
int width = (int)sourceSize.X;
int height = (int)sourceSize.Y;
int downsampledWidth = Math.Max(1, width / DownsampleFactor);
int downsampledHeight = Math.Max(1, height / DownsampleFactor);
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
InitializeGaussianBlur(new Vector2F(downsampledWidth, downsampledHeight), false);
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
InitializeGaussianBlur(new Vector2F(downsampledWidth, downsampledHeight), true);
}
// Get temporary render targets.
var downsampleFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, source.Format, DepthFormat.None);
RenderTarget2D blurredScene0 = renderTargetPool.Obtain2D(downsampleFormat);
RenderTarget2D blurredScene1 = renderTargetPool.Obtain2D(downsampleFormat);
var blurredDepthFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, context.GBuffer0.Format, DepthFormat.None);
RenderTarget2D blurredDepth0 = renderTargetPool.Obtain2D(blurredDepthFormat);
var cocFormat = new RenderTargetFormat(width, height, false, SurfaceFormat.Single, DepthFormat.None);
RenderTarget2D cocImage = renderTargetPool.Obtain2D(cocFormat);
var downSampledCocFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, cocFormat.SurfaceFormat, DepthFormat.None);
RenderTarget2D cocImageBlurred = renderTargetPool.Obtain2D(downSampledCocFormat);
// ----- Create CoC map.
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(cocImage);
_screenSizeParameter.SetValue(new Vector2(cocImage.Width, cocImage.Height));
_depthTextureParameter.SetValue(context.GBuffer0);
_nearBlurDistanceParameter.SetValue(NearBlurDistance);
_nearFocusDistanceParameter.SetValue(NearFocusDistance);
_farFocusDistanceParameter.SetValue(FarFocusDistance);
_farBlurDistanceParameter.SetValue(FarBlurDistance);
_farParameter.SetValue(cameraNode.Camera.Projection.Far);
_circleOfConfusionPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Downsample cocImage to cocImageBlurred.
context.SourceTexture = cocImage;
context.RenderTarget = cocImageBlurred;
context.Viewport = new Viewport(0, 0, cocImageBlurred.Width, cocImageBlurred.Height);
_downsampleFilter.Process(context);
renderTargetPool.Recycle(cocImage);
// ----- Downsample source to blurredScene0.
context.SourceTexture = source;
context.RenderTarget = blurredScene0;
context.Viewport = new Viewport(0, 0, blurredScene0.Width, blurredScene0.Height);
_downsampleFilter.Process(context);
// ----- Downsample depth texture to blurredDepth0.
context.SourceTexture = context.GBuffer0;
context.RenderTarget = blurredDepth0;
context.Viewport = new Viewport(0, 0, blurredDepth0.Width, blurredDepth0.Height);
_downsampleFilter.Process(context);
// ----- Blur scene.
// Horizontal blur
graphicsDevice.SetRenderTarget(blurredScene1);
_screenSizeParameter.SetValue(new Vector2(blurredScene0.Width, blurredScene0.Height));
_blurTextureParameter.SetValue(blurredScene0);
_downsampledDepthTextureParameter.SetValue(blurredDepth0);
_downsampledCocTextureParameter.SetValue(cocImageBlurred);
_offsetsParameter.SetValue(_horizontalOffsets);
_weightsParameter.SetValue(_weights);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Vertical blur.
graphicsDevice.SetRenderTarget(blurredScene0);
_blurTextureParameter.SetValue(blurredScene1);
_offsetsParameter.SetValue(_verticalOffsets);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(blurredScene1);
// ----- Blur cocImageBlurred.
context.SourceTexture = cocImageBlurred;
context.RenderTarget = cocImageBlurred;
context.Viewport = new Viewport(0, 0, cocImageBlurred.Width, cocImageBlurred.Height);
_cocBlur.Process(context); // We make a two pass blur, so context.SourceTexture can be equal to context.RenderTarget.
// ----- Blur depth.
context.SourceTexture = blurredDepth0;
context.RenderTarget = blurredDepth0;
context.Viewport = new Viewport(0, 0, blurredDepth0.Width, blurredDepth0.Height);
_cocBlur.Process(context);
// ----- Create final DoF image.
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_screenSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sceneTextureParameter.SetValue(source);
_blurTextureParameter.SetValue(blurredScene0);
_depthTextureParameter.SetValue(context.GBuffer0);
_downsampledDepthTextureParameter.SetValue(blurredDepth0);
_downsampledCocTextureParameter.SetValue(cocImageBlurred);
_depthOfFieldPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Clean-up
_depthTextureParameter.SetValue((Texture2D)null);
_blurTextureParameter.SetValue((Texture2D)null);
_downsampledDepthTextureParameter.SetValue((Texture2D)null);
_downsampledCocTextureParameter.SetValue((Texture2D)null);
_sceneTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(blurredScene0);
renderTargetPool.Recycle(blurredDepth0);
renderTargetPool.Recycle(cocImageBlurred);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
protected override void OnProcess(RenderContext context)
{
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
throw new GraphicsException("Source texture format must not be a floating-point format.");
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
int downsampledWidth = Math.Max(1, source.Width / DownsampleFactor);
int downsampledHeight = Math.Max(1, source.Height / DownsampleFactor);
// ----- Get temporary render targets.
var bloomFormat = new RenderTargetFormat(downsampledWidth, downsampledHeight, false, SurfaceFormat.Color, DepthFormat.None);
RenderTarget2D bloom0 = renderTargetPool.Obtain2D(bloomFormat);
RenderTarget2D bloom1 = renderTargetPool.Obtain2D(bloomFormat);
// ----- Downsample scene to bloom0.
context.RenderTarget = bloom0;
context.Viewport = new Viewport(0, 0, bloom0.Width, bloom0.Height);
_downsampleFilter.Process(context);
// ----- Create bloom image
graphicsDevice.SetRenderTarget(bloom1);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_bloomThresholdParameter.SetValue(Threshold);
_bloomIntensityParameter.SetValue(Intensity);
_bloomSaturationParameter.SetValue(Saturation);
_sceneTextureParameter.SetValue(bloom0);
_brightnessPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// bloom0 is not needed anymore.
renderTargetPool.Recycle(bloom0);
// We make a two-pass blur, so source can be equal to target.
context.SourceTexture = bloom1;
context.RenderTarget = bloom1;
_blur.Process(context);
// ----- Combine scene and bloom.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sceneTextureParameter.SetValue(source);
_bloomTextureParameter.SetValue(bloom1);
_combinePass.Apply();
graphicsDevice.DrawFullScreenQuad();
// ----- Clean-up
_sceneTextureParameter.SetValue((Texture2D)null);
_bloomTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(bloom1);
// Restore original context.
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
internal override void ProcessJobs(RenderContext context, RenderOrder order)
{
var graphicsDevice = _graphicsService.GraphicsDevice;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
var target = context.RenderTarget;
var viewport = context.Viewport;
Debug.Assert(_shadowMasks.Length > 0);
Debug.Assert(_shadowMasks[0] != null);
RenderTarget2D lowResTarget = null;
if (UseHalfResolution && Numeric.IsGreater(UpsampleDepthSensitivity, 0))
{
// Half-res rendering with upsampling.
var format = new RenderTargetFormat(_shadowMasks[0]);
format.Width /= 2;
format.Height /= 2;
lowResTarget = _graphicsService.RenderTargetPool.Obtain2D(format);
}
int index = 0;
var jobs = Jobs.Array;
int jobCount = Jobs.Count;
int lastShadowMaskIndex = -1;
while (index < jobCount)
{
int shadowMaskIndex = (int)(jobs[index].SortKey >> 16);
var renderer = jobs[index].Renderer;
// Find end of current batch.
int endIndexExclusive = index + 1;
while (endIndexExclusive < jobCount)
{
if ((int)(jobs[endIndexExclusive].SortKey >> 16) != lastShadowMaskIndex ||
jobs[endIndexExclusive].Renderer != renderer)
{
break;
}
endIndexExclusive++;
}
// Restore the render state. (The integrated scene node renderers properly
// restore the render state, but third-party renderers might mess it up.)
if (index > 0)
{
savedRenderState.Restore();
}
if (shadowMaskIndex != lastShadowMaskIndex)
{
// Done with current shadow mask. Apply filter.
if (lastShadowMaskIndex >= 0)
{
PostProcess(context, context.RenderTarget, _shadowMasks[lastShadowMaskIndex]);
}
// Switch to next shadow mask.
lastShadowMaskIndex = shadowMaskIndex;
var shadowMask = lowResTarget ?? _shadowMasks[shadowMaskIndex];
// Set device render target and clear it to white (= no shadow).
graphicsDevice.SetRenderTarget(shadowMask);
context.RenderTarget = shadowMask;
context.Viewport = graphicsDevice.Viewport;
graphicsDevice.Clear(Color.White);
}
// Submit batch to renderer.
// (Use Accessor to expose current batch as IList<SceneNode>.)
JobsAccessor.Set(Jobs, index, endIndexExclusive);
renderer.Render(JobsAccessor, context, order);
JobsAccessor.Reset();
index = endIndexExclusive;
}
// Done with last shadow mask. Apply filter.
PostProcess(context, context.RenderTarget, _shadowMasks[lastShadowMaskIndex]);
savedRenderState.Restore();
graphicsDevice.ResetTextures();
graphicsDevice.SetRenderTarget(null);
context.RenderTarget = target;
context.Viewport = viewport;
_graphicsService.RenderTargetPool.Recycle(lowResTarget);
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
// The width/height of the current input.
int sourceWidth = context.SourceTexture.Width;
int sourceHeight = context.SourceTexture.Height;
// The target width/height.
int targetWidth = context.Viewport.Width;
int targetHeight = context.Viewport.Height;
// Surface format of input.
bool isFloatingPointFormat = TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format);
// Floating-point formats cannot use linear filtering, so we need two different paths.
RenderTarget2D last = null;
if (!isFloatingPointFormat)
{
// ----- We can use bilinear hardware filtering.
do
{
// Determine downsample factor. Use the largest possible factor to minimize passes.
int factor;
if (sourceWidth / 2 <= targetWidth && sourceHeight / 2 <= targetHeight)
factor = 2;
else if (sourceWidth / 4 <= targetWidth && sourceHeight / 4 <= targetHeight)
factor = 4;
else if (sourceWidth / 6 <= targetWidth && sourceHeight / 6 <= targetHeight)
factor = 6;
else
factor = 8;
// Downsample to this target size.
int tempTargetWidth = Math.Max(targetWidth, sourceWidth / factor);
int tempTargetHeight = Math.Max(targetHeight, sourceHeight / factor);
// Is this the final pass that renders into context.RenderTarget?
bool isFinalPass = (tempTargetWidth <= targetWidth && tempTargetHeight <= targetHeight);
RenderTarget2D temp = null;
if (isFinalPass)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else
{
// Get temporary render target for intermediate steps.
var tempFormat = new RenderTargetFormat(tempTargetWidth, tempTargetHeight, false, context.SourceTexture.Format, DepthFormat.None);
temp = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
graphicsDevice.SetRenderTarget(temp);
}
_sourceSizeParameter.SetValue(new Vector2(sourceWidth, sourceHeight));
_targetSizeParameter.SetValue(new Vector2(tempTargetWidth, tempTargetHeight));
_sourceTextureParameter.SetValue(last ?? context.SourceTexture);
if (factor == 2)
_linear2Pass.Apply();
else if (factor == 4)
_linear4Pass.Apply();
else if (factor == 6)
_linear6Pass.Apply();
else if (factor == 8)
_linear8Pass.Apply();
graphicsDevice.DrawFullScreenQuad();
GraphicsService.RenderTargetPool.Recycle(last);
last = temp;
sourceWidth = tempTargetWidth;
sourceHeight = tempTargetHeight;
} while (sourceWidth > targetWidth || sourceHeight > targetHeight);
}
else
{
// ----- We cannot use hardware filtering. :-(
do
{
// Determine downsample factor. Use the largest possible factor to minimize passes.
int factor;
if (sourceWidth / 2 <= targetWidth && sourceHeight / 2 <= targetHeight)
factor = 2;
else if (sourceWidth / 3 <= targetWidth && sourceHeight / 3 <= targetHeight)
factor = 3;
else
factor = 4;
// Downsample to this target size.
int tempTargetWidth = Math.Max(targetWidth, sourceWidth / factor);
int tempTargetHeight = Math.Max(targetHeight, sourceHeight / factor);
// Is this the final pass that renders into context.RenderTarget?
bool isFinalPass = (tempTargetWidth <= targetWidth && tempTargetHeight <= targetHeight);
RenderTarget2D temp = null;
if (isFinalPass)
{
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
}
else
{
// Get temporary render target for intermediate steps.
var tempFormat = new RenderTargetFormat(tempTargetWidth, tempTargetHeight, false, context.SourceTexture.Format, DepthFormat.None);
temp = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
graphicsDevice.SetRenderTarget(temp);
}
_sourceSizeParameter.SetValue(new Vector2(sourceWidth, sourceHeight));
_targetSizeParameter.SetValue(new Vector2(tempTargetWidth, tempTargetHeight));
var source = last ?? context.SourceTexture;
_sourceTextureParameter.SetValue(source);
if (source != context.GBuffer0)
{
if (factor == 2)
_point2Pass.Apply();
else if (factor == 3)
_point3Pass.Apply();
else
_point4Pass.Apply();
}
else
{
// This is the depth buffer and it needs special handling.
if (factor == 2)
_point2DepthPass.Apply();
else if (factor == 3)
_point3DepthPass.Apply();
else
_point4DepthPass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
GraphicsService.RenderTargetPool.Recycle(last);
last = temp;
sourceWidth = tempTargetWidth;
sourceHeight = tempTargetHeight;
} while (sourceWidth > targetWidth || sourceHeight > targetHeight);
_sourceTextureParameter.SetValue((Texture2D)null);
Debug.Assert(last == null, "Intermediate render target should have been recycled.");
}
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
// Get temporary render targets.
var sourceSize = new Vector2F(source.Width, source.Height);
var isFloatingPointFormat = TextureHelper.IsFloatingPointFormat(source.Format);
var sceneFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
var maskedScene = renderTargetPool.Obtain2D(sceneFormat);
var rayFormat = new RenderTargetFormat(
Math.Max(1, (int)(sourceSize.X / DownsampleFactor)),
Math.Max(1, (int)(sourceSize.Y / DownsampleFactor)),
false,
source.Format,
DepthFormat.None);
var rayImage0 = renderTargetPool.Obtain2D(rayFormat);
var rayImage1 = renderTargetPool.Obtain2D(rayFormat);
// Get view and view-projection transforms.
var cameraNode = context.CameraNode;
Matrix44F projection = cameraNode.Camera.Projection.ToMatrix44F();
Matrix44F view = cameraNode.View;
Matrix44F viewProjection = projection * view;
// We simply place the light source "far away" in opposite light ray direction.
Vector4F lightPositionWorld = new Vector4F(-LightDirection * 10000, 1);
// Convert to clip space.
Vector4F lightPositionProj = viewProjection * lightPositionWorld;
Vector3F lightPositionClip = Vector4F.HomogeneousDivide(lightPositionProj);
// Convert from clip space [-1, 1] to texture space [0, 1].
Vector2 lightPosition = new Vector2(lightPositionClip.X * 0.5f + 0.5f, -lightPositionClip.Y * 0.5f + 0.5f);
// We use dot²(forward, -LightDirection) as a smooth S-shaped attenuation
// curve to reduce the god ray effect when we look orthogonal or away from the sun.
var lightDirectionView = view.TransformDirection(LightDirection);
float z = Math.Max(0, lightDirectionView.Z);
float attenuation = z * z;
// Common effect parameters.
_parameters0Parameter.SetValue(new Vector4(lightPosition.X, lightPosition.Y, LightRadius * LightRadius, Scale));
_parameters1Parameter.SetValue(new Vector2(Softness, graphicsDevice.Viewport.AspectRatio));
_intensityParameter.SetValue((Vector3)Intensity * attenuation);
_numberOfSamplesParameter.SetValue(NumberOfSamples);
_gBuffer0Parameter.SetValue(context.GBuffer0);
// First, create a scene image where occluders are black.
graphicsDevice.SetRenderTarget(maskedScene);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(source);
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp; // G-Buffer 0.
_createMaskPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Downsample image.
context.SourceTexture = maskedScene;
context.RenderTarget = rayImage0;
context.Viewport = new Viewport(0, 0, rayImage0.Width, rayImage0.Height);
_downsampleFilter.Process(context);
// Compute light shafts.
_viewportSizeParameter.SetValue(new Vector2(context.Viewport.Width, context.Viewport.Height));
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
for (int i = 0; i < NumberOfPasses; i++)
{
graphicsDevice.SetRenderTarget(rayImage1);
_sourceTextureParameter.SetValue(rayImage0);
_blurPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Put the current result in variable rayImage0.
MathHelper.Swap(ref rayImage0, ref rayImage1);
}
// Combine light shaft image with scene.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(source);
_rayTextureParameter.SetValue(rayImage0);
graphicsDevice.SamplerStates[0] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = isFloatingPointFormat ? SamplerState.PointClamp : SamplerState.LinearClamp;
_combinePass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Clean-up
_sourceTextureParameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
_rayTextureParameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(maskedScene);
renderTargetPool.Recycle(rayImage0);
renderTargetPool.Recycle(rayImage1);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}
protected override void OnProcess(RenderContext context)
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// Get velocity buffers from render context.
object value0, value1;
context.Data.TryGetValue(RenderContextKeys.VelocityBuffer, out value0);
context.Data.TryGetValue(RenderContextKeys.LastVelocityBuffer, out value1);
var velocityBuffer0 = value0 as Texture2D;
var velocityBuffer1 = value1 as Texture2D;
if (velocityBuffer0 == null)
throw new GraphicsException("VelocityBuffer needs to be set in the render context (RenderContext.Data[\"VelocityBuffer\"]).");
if (TextureHelper.IsFloatingPointFormat(context.SourceTexture.Format))
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
if (!SoftenEdges)
{
// ----- Motion blur using one or two velocity buffers
_effect.CurrentTechnique = _effect.Techniques[0];
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_numberOfSamplesParameter.SetValue((int)NumberOfSamples);
_velocityTextureParameter.SetValue(velocityBuffer0);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer0.Format))
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
if (velocityBuffer1 == null || !UseLastVelocityBuffer)
{
_singlePass.Apply();
}
else
{
_velocityTexture2Parameter.SetValue(velocityBuffer1);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer1.Format))
graphicsDevice.SamplerStates[2] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[2] = SamplerState.LinearClamp;
_dualPass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
}
else
{
// ----- Advanced motion blur (based on paper "A Reconstruction Filter for Plausible Motion Blur")
context.ThrowIfCameraMissing();
context.ThrowIfGBuffer0Missing();
// The width/height of the current velocity input.
int sourceWidth;
int sourceHeight;
if (context.RenderTarget != null)
{
sourceWidth = velocityBuffer0.Width;
sourceHeight = velocityBuffer0.Height;
}
else
{
sourceWidth = context.Viewport.Width;
sourceHeight = context.Viewport.Height;
}
// The downsampled target width/height.
int targetWidth = Math.Max(1, (int)(sourceWidth / MaxBlurRadius));
int targetHeight = Math.Max(1, (int)(sourceHeight / MaxBlurRadius));
var tempFormat = new RenderTargetFormat(targetWidth, targetHeight, false, SurfaceFormat.Color, DepthFormat.None);
RenderTarget2D temp0 = renderTargetPool.Obtain2D(tempFormat);
RenderTarget2D temp1 = renderTargetPool.Obtain2D(tempFormat);
// ----- Downsample max velocity buffer
_effect.CurrentTechnique = _effect.Techniques[0];
_maxBlurRadiusParameter.SetValue(new Vector2(MaxBlurRadius / sourceWidth, MaxBlurRadius / sourceHeight));
Texture2D currentVelocityBuffer = velocityBuffer0;
bool isFinalPass;
do
{
// Downsample to this target size.
sourceWidth = Math.Max(targetWidth, sourceWidth / 2);
sourceHeight = Math.Max(targetHeight, sourceHeight / 2);
// Is this the final downsample pass?
isFinalPass = (sourceWidth <= targetWidth && sourceHeight <= targetHeight);
// Get temporary render target for intermediate steps.
RenderTarget2D temp = null;
if (!isFinalPass)
{
tempFormat.Width = sourceWidth;
tempFormat.Height = sourceHeight;
temp = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
}
graphicsDevice.SetRenderTarget(isFinalPass ? temp0 : temp);
_sourceSizeParameter.SetValue(new Vector2(sourceWidth * 2, sourceHeight * 2));
_viewportSizeParameter.SetValue(new Vector2(sourceWidth, sourceHeight));
_velocityTextureParameter.SetValue(currentVelocityBuffer);
if (TextureHelper.IsFloatingPointFormat(currentVelocityBuffer.Format))
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
if (currentVelocityBuffer == velocityBuffer0)
_downsampleMaxFromFloatBufferParameter.Apply();
else
_downsampleMaxParameter.Apply();
graphicsDevice.DrawFullScreenQuad();
if (currentVelocityBuffer != velocityBuffer0)
GraphicsService.RenderTargetPool.Recycle((RenderTarget2D)currentVelocityBuffer);
currentVelocityBuffer = temp;
} while (!isFinalPass);
// ----- Compute max velocity of neighborhood.
graphicsDevice.SetRenderTarget(temp1);
_velocityTextureParameter.SetValue(temp0);
_neighborMaxPass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(temp0);
// Compute motion blur.
graphicsDevice.SetRenderTarget(context.RenderTarget);
graphicsDevice.Viewport = context.Viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_sourceTextureParameter.SetValue(context.SourceTexture);
_numberOfSamplesParameter.SetValue((int)NumberOfSamples);
_velocityTextureParameter.SetValue(velocityBuffer0);
if (TextureHelper.IsFloatingPointFormat(velocityBuffer0.Format))
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
_velocityTexture2Parameter.SetValue(temp1);
if (TextureHelper.IsFloatingPointFormat(temp1.Format))
graphicsDevice.SamplerStates[2] = SamplerState.PointClamp;
else
graphicsDevice.SamplerStates[2] = SamplerState.LinearClamp;
_gBuffer0Parameter.SetValue(context.GBuffer0);
_jitterTextureParameter.SetValue(_jitterTexture);
_softZExtentParameter.SetValue(0.01f / context.CameraNode.Camera.Projection.Far); // 1 mm to 10 cm.
_softEdgePass.Apply();
graphicsDevice.DrawFullScreenQuad();
_sourceTextureParameter.SetValue((Texture2D)null);
_velocityTextureParameter.SetValue((Texture2D)null);
_velocityTexture2Parameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
renderTargetPool.Recycle(temp1);
}
}
