private void InsertUAVResourceBarrier(ID3D12Resource uavBuffer)
{
var uav = new ResourceUnorderedAccessViewBarrier(uavBuffer);
ResourceBarrier barrier = new ResourceBarrier(uav);
commandList.ResourceBarrier(barrier);
}
private void InsertTransitionResourceBarrier(ID3D12Resource swapChainBuffer, ResourceStates before, ResourceStates after)
{
var transition = new ResourceTransitionBarrier(swapChainBuffer, before, after, ResourceBarrier.AllSubResources);
ResourceBarrier barrier = new ResourceBarrier(transition, ResourceBarrierFlags.None);
commandList.ResourceBarrier(barrier);
}
public unsafe AccelerationStructureBuffers CreateTopLevelAS(ID3D12Device5 pDevice, ID3D12GraphicsCommandList4 pCmdList, ID3D12Resource pBottomLevelAS, ref long tlasSize)
{
// First, get the size of the TLAS buffers and create them
BuildRaytracingAccelerationStructureInputs inputs = new BuildRaytracingAccelerationStructureInputs();
inputs.Layout = ElementsLayout.Array;
inputs.Flags = RaytracingAccelerationStructureBuildFlags.None;
inputs.DescriptorsCount = 1;
inputs.Type = RaytracingAccelerationStructureType.TopLevel;
RaytracingAccelerationStructurePrebuildInfo info;
info = pDevice.GetRaytracingAccelerationStructurePrebuildInfo(inputs);
// Create the buffers
AccelerationStructureBuffers buffers = new AccelerationStructureBuffers();
buffers.pScratch = this.CreateBuffer(pDevice, (uint)info.ScratchDataSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.UnorderedAccess, kDefaultHeapProps);
buffers.pResult = this.CreateBuffer(pDevice, (uint)info.ResultDataMaxSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.RaytracingAccelerationStructure, kDefaultHeapProps);
tlasSize = info.ResultDataMaxSizeInBytes;
// The instance desc should be inside a buffer, create and map the buffer
buffers.pInstanceDesc = this.CreateBuffer(pDevice, (uint)Unsafe.SizeOf <FixedRaytracingInstanceDescription>(), ResourceFlags.None, ResourceStates.GenericRead, kUploadHeapProps);
FixedRaytracingInstanceDescription pInstanceDesc;
// Initialize the instance desc. We only have a single instance
pInstanceDesc.InstanceID = 0; // This value will be exposed to the shader via InstanceID()
pInstanceDesc.InstanceContributionToHitGroupIndex = 0; // This is the offset inside the shader-table. We only have a single geometry, so the offset 0
pInstanceDesc.Flags = (byte)RaytracingInstanceFlags.None;
pInstanceDesc.Transform = Matrix4x4.Identity.ToMatrix3x4();
pInstanceDesc.AccelerationStructure = pBottomLevelAS.GPUVirtualAddress;
pInstanceDesc.InstanceMask = 0xff;
IntPtr data;
data = buffers.pInstanceDesc.Map(0, null);
Helpers.MemCpy(data, pInstanceDesc, (uint)Unsafe.SizeOf <FixedRaytracingInstanceDescription>());
buffers.pInstanceDesc.Unmap(0, null);
// Create the TLAS
BuildRaytracingAccelerationStructureDescription asDesc = new BuildRaytracingAccelerationStructureDescription();
asDesc.Inputs = inputs;
asDesc.Inputs.InstanceDescriptions = buffers.pInstanceDesc.GPUVirtualAddress;
asDesc.DestinationAccelerationStructureData = buffers.pResult.GPUVirtualAddress;
asDesc.ScratchAccelerationStructureData = buffers.pScratch.GPUVirtualAddress;
pCmdList.BuildRaytracingAccelerationStructure(asDesc);
// We need to insert a UAV barrier before using the acceleration structures in a raytracing operation
ResourceBarrier uavBarrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(buffers.pResult));
pCmdList.ResourceBarrier(uavBarrier);
return(buffers);
}
public override void Record(GraphicsContext context, ref Resolver resolver)
{
var resources = resolver.GetComponent <PipelineResources>();
var sceneColor = resolver.ResolveResource(resources.SceneColor);
context.Barrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.Present, ResourceState.CopyDestination));
context.CopyResource(sceneColor, _output.OutputBuffer);
context.Barrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.CopyDestination, ResourceState.Present));
}
private void InsertTransitionResourceBarriers(ID3D12Resource swapChainBuffer, ResourceStates[] before, ResourceStates[] after)
{
ResourceBarrier[] barriers = new ResourceBarrier[before.Length];
for (int i = 0; i < barriers.Length; i++)
{
var transition = new ResourceTransitionBarrier(swapChainBuffer, before[i], after[i], ResourceBarrier.AllSubResources);
barriers[i] = new ResourceBarrier(transition, ResourceBarrierFlags.None);
}
commandList.ResourceBarrier(barriers);
}
private AccelerationStructureBuffers CreateBottomLevelAS(ID3D12Device5 pDevice, ID3D12GraphicsCommandList4 pCmdList, ID3D12Resource vb, uint vbCount, ID3D12Resource ib, uint ibCount)
{
int geometryCount = 1;
RaytracingGeometryDescription[] geomDesc = new RaytracingGeometryDescription[geometryCount];
// Primitives
geomDesc[0].Type = RaytracingGeometryType.Triangles;
geomDesc[0].Triangles = new RaytracingGeometryTrianglesDescription();
geomDesc[0].Triangles.VertexBuffer = new GpuVirtualAddressAndStride();
geomDesc[0].Triangles.VertexBuffer.StartAddress = vb.GPUVirtualAddress;
geomDesc[0].Triangles.VertexBuffer.StrideInBytes = Unsafe.SizeOf <VertexPositionNormalTangentTexture>();
geomDesc[0].Triangles.VertexFormat = Format.R32G32B32_Float;
geomDesc[0].Triangles.VertexCount = (int)vbCount;
geomDesc[0].Triangles.IndexBuffer = ib.GPUVirtualAddress;
geomDesc[0].Triangles.IndexCount = (int)ibCount;
geomDesc[0].Triangles.IndexFormat = Format.R16_UInt;
geomDesc[0].Flags = RaytracingGeometryFlags.Opaque;
// Get the size requirements for the scratch and AS buffers
BuildRaytracingAccelerationStructureInputs inputs = new BuildRaytracingAccelerationStructureInputs();
inputs.Layout = ElementsLayout.Array;
inputs.Flags = RaytracingAccelerationStructureBuildFlags.None;
inputs.DescriptorsCount = geometryCount;
inputs.GeometryDescriptions = geomDesc;
inputs.Type = RaytracingAccelerationStructureType.BottomLevel;
RaytracingAccelerationStructurePrebuildInfo info;
info = pDevice.GetRaytracingAccelerationStructurePrebuildInfo(inputs);
// Create the buffers. They need to support UAV, and since we are going to immediately use them, we create them with an unordered-access state
AccelerationStructureBuffers buffers = new AccelerationStructureBuffers();
buffers.pScratch = this.CreateBuffer(pDevice, (uint)info.ScratchDataSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.UnorderedAccess, kDefaultHeapProps);
buffers.pResult = this.CreateBuffer(pDevice, (uint)info.ResultDataMaxSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.RaytracingAccelerationStructure, kDefaultHeapProps);
// Create the bottom-level AS
BuildRaytracingAccelerationStructureDescription asDesc = new BuildRaytracingAccelerationStructureDescription();
asDesc.Inputs = inputs;
asDesc.DestinationAccelerationStructureData = buffers.pResult.GPUVirtualAddress;
asDesc.ScratchAccelerationStructureData = buffers.pScratch.GPUVirtualAddress;
pCmdList.BuildRaytracingAccelerationStructure(asDesc);
// We need to insert a UAV barrier before using the acceleration structures in a raytracing operation
ResourceBarrier uavBarrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(buffers.pResult));
pCmdList.ResourceBarrier(uavBarrier);
return(buffers);
}
public ResourceBarrier CreateUav(ResourceBarrierOptions options)
{
if (Desc.Type == ResourceType.Buffer)
{
return(ResourceBarrier.UnorderedAccess(Desc.Buffer, options));
}
else
{
return(ResourceBarrier.UnorderedAccess(Desc.Texture, options));
}
}
public override void Record(GraphicsContext context, ref Resolver resolver)
{
using var _ = context.ScopedEvent(Argb32.Green, "Tonemap");
var resources = resolver.GetComponent <PipelineResources>();
var sampledOutput = resolver.ResolveResource(resources.SampledOutput);
context.Barrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.Present, ResourceState.CopyDestination));
context.CopyResource(sampledOutput, _output.OutputBuffer);
context.Barrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.CopyDestination, ResourceState.Present));
}
public void ResourceTransition(Texture resource, ResourceStates before, ResourceStates after)
{
//ResourceBarrier barrier = new ResourceBarrier(new ResourceTransitionBarrier(resource, (ResourceStates)before, (ResourceStates)after));
var barriers = stackalloc ResourceBarrier[1];
barriers[0] = new ResourceBarrier(new ResourceTransitionBarrier(resource.Resource, (ResourceStates)before, (ResourceStates)after));
nativeCommandList.ResourceBarrier(*barriers);
//NativeCommandList.ResourceBarrierTransition(resource.Resource, (ResourceStates)before, (ResourceStates)after);
}
public unsafe void ResourceBarrierTransition(
ID3D12Resource resource,
ResourceStates stateBefore,
ResourceStates stateAfter,
int subresource = D3D12.ResourceBarrierAllSubResources,
ResourceBarrierFlags flags = ResourceBarrierFlags.None)
{
var barrier = new ResourceBarrier(
new ResourceTransitionBarrier(resource, stateBefore, stateAfter, subresource),
flags);
ResourceBarrier(1, new IntPtr(&barrier));
}
public ResourceBarrier CreateTransition(ResourceState state, ResourceBarrierOptions options)
{
ResourceBarrier barrier;
if (Desc.Type == ResourceType.Buffer)
{
barrier = ResourceBarrier.Transition(Desc.Buffer, CurrentTrackedState, state, options);
}
else
{
barrier = ResourceBarrier.Transition(Desc.Texture, CurrentTrackedState, state, uint.MaxValue, options);
}
CurrentTrackedState = state;
return(barrier);
}
private AccelerationStructureBuffers CreateBottomLevelAS(ID3D12Device5 device, ID3D12GraphicsCommandList4 commandList,
ID3D12Resource[] vertexBuffers, int[] vertexCounts, int geometryCount)
{
RaytracingGeometryDescription[] descs = new RaytracingGeometryDescription[geometryCount];
for (int i = 0; i < descs.Length; i++)
{
descs[i] = new RaytracingGeometryDescription();
descs[i].Type = RaytracingGeometryType.Triangles;
descs[i].Triangles = new RaytracingGeometryTrianglesDescription();
descs[i].Triangles.VertexBuffer = new GpuVirtualAddressAndStride();
descs[i].Triangles.VertexBuffer.StartAddress = vertexBuffers[i].GPUVirtualAddress;
descs[i].Triangles.VertexBuffer.StrideInBytes = 3 * 4;
descs[i].Triangles.VertexFormat = Format.R32G32B32_Float;
descs[i].Triangles.VertexCount = vertexCounts[i];
descs[i].Flags = RaytracingGeometryFlags.Opaque;
}
BuildRaytracingAccelerationStructureInputs inputs = new BuildRaytracingAccelerationStructureInputs();
inputs.Layout = ElementsLayout.Array;
inputs.Flags = RaytracingAccelerationStructureBuildFlags.None;
inputs.DescriptorsCount = geometryCount;
inputs.GeometryDescriptions = descs;
inputs.Type = RaytracingAccelerationStructureType.BottomLevel;
RaytracingAccelerationStructurePrebuildInfo info = device.GetRaytracingAccelerationStructurePrebuildInfo(inputs);
HeapProperties properties = new HeapProperties(HeapType.Default, CpuPageProperty.Unknown, MemoryPool.Unknown, 0, 0);
AccelerationStructureBuffers buffers = new AccelerationStructureBuffers();
buffers.Scratch = CreateBuffer(device, info.ScratchDataSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.UnorderedAccess, properties);
buffers.Result = CreateBuffer(device, info.ResultDataMaxSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.RaytracingAccelerationStructure, properties);
BuildRaytracingAccelerationStructureDescription asDesc = new BuildRaytracingAccelerationStructureDescription();
asDesc.Inputs = inputs;
asDesc.DestinationAccelerationStructureData = buffers.Result.GPUVirtualAddress;
asDesc.ScratchAccelerationStructureData = buffers.Scratch.GPUVirtualAddress;
commandList.BuildRaytracingAccelerationStructure(asDesc);
commandList.ResourceBarrier(ResourceBarrier.BarrierUnorderedAccessView(buffers.Result));
return(buffers);
}
public override void Render()
{
var context = _device.BeginGraphicsContext(_pso);
using (context.ScopedBarrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.Present, ResourceState.RenderTarget)))
{
context.SetViewportAndScissor(_output.Resolution);
context.SetRenderTarget(_output.OutputBufferView);
context.SetTopology(Topology.TriangleList);
context.SetShaderResourceBuffer(0, _colors);
context.SetRoot32BitConstants(1, _constants);
context.Draw(3);
}
context.Close();
_device.Execute(context).Block();
_output.Present();
}
public override void Record(GraphicsContext context, ref Resolver resolver)
{
using var _ = context.ScopedEvent(Argb32.Green, "Tonemap");
var color = default(TextureHandle);//builder.GetInput<TextureHandle>();
var settings = resolver.GetComponent <RenderSettings>();
var sampledOutput = resolver.ResolveResource(color);
using (context.ScopedBarrier(ResourceBarrier.Transition(_output.OutputBuffer, ResourceState.Present, settings.Msaa.IsMultiSampled ? ResourceState.ResolveDestination : ResourceState.CopyDestination)))
{
if (settings.Msaa.IsMultiSampled)
{
context.ResolveSubresource(sampledOutput, _output.OutputBuffer);
}
else
{
context.CopyResource(sampledOutput, _output.OutputBuffer);
}
}
}
public unsafe void ResourceBarrier(ResourceBarrier barrier)
{
ResourceBarrier(1, new IntPtr(&barrier));
}
public unsafe void ResourceBarrierUnorderedAccessView(ID3D12Resource resource)
{
var barrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(resource));
ResourceBarrier(1, new IntPtr(&barrier));
}
public unsafe void ResourceBarrierAliasing(ID3D12Resource resourceBefore, ID3D12Resource resourceAfter)
{
var barrier = new ResourceBarrier(new ResourceAliasingBarrier(resourceBefore, resourceAfter));
ResourceBarrier(1, new IntPtr(&barrier));
}
public void ResourceBarrier(ResourceBarrier barrier)
{
ResourceBarrier(1, &barrier);
}
public void ResourceBarrierUnorderedAccessView(ID3D12Resource resource)
{
var barrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(resource));
ResourceBarrier(1, &barrier);
}
public unsafe AccelerationStructureBuffers BuildTopLevelAS(ID3D12Device5 pDevice, ID3D12GraphicsCommandList4 pCmdList, ID3D12Resource[] pBottomLevelAS, ref long tlasSize, float rotation, bool update, ref AccelerationStructureBuffers buffers)
{
// First, get the size of the TLAS buffers and create them
BuildRaytracingAccelerationStructureInputs inputs = new BuildRaytracingAccelerationStructureInputs();
inputs.Layout = ElementsLayout.Array;
inputs.Flags = RaytracingAccelerationStructureBuildFlags.AllowUpdate;
inputs.DescriptorsCount = 3; // NumDescs
inputs.Type = RaytracingAccelerationStructureType.TopLevel;
RaytracingAccelerationStructurePrebuildInfo info;
info = pDevice.GetRaytracingAccelerationStructurePrebuildInfo(inputs);
if (update)
{
// If this a request for an update, then the TLAS was already used in a DispatchRay() call. We need a UAV barrier to make sure the read operation ends before updating the buffer
ResourceBarrier uavBarrier1 = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(buffers.pResult));
pCmdList.ResourceBarrier(uavBarrier1);
}
else
{
buffers.pScratch = this.CreateBuffer(pDevice, (uint)info.ScratchDataSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.UnorderedAccess, kDefaultHeapProps);
buffers.pResult = this.CreateBuffer(pDevice, (uint)info.ResultDataMaxSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.RaytracingAccelerationStructure, kDefaultHeapProps);
buffers.pInstanceDesc = this.CreateBuffer(pDevice, (uint)Unsafe.SizeOf <FixedRaytracingInstanceDescription>() * 3, ResourceFlags.None, ResourceStates.GenericRead, kUploadHeapProps);
tlasSize = info.ResultDataMaxSizeInBytes;
}
FixedRaytracingInstanceDescription[] instanceDescs = new FixedRaytracingInstanceDescription[3];
// The transformation matrices for the instances
Matrix4x4[] transformation = new Matrix4x4[3];
Matrix4x4 rotationMat = Matrix4x4.CreateRotationY(rotation);
transformation[0] = Matrix4x4.Identity;
transformation[1] = rotationMat * Matrix4x4.CreateTranslation(new Vector3(-2, 0, 0));
transformation[2] = rotationMat * Matrix4x4.CreateTranslation(new Vector3(2, 0, 0));
// The InstanceContributionToHitGroupIndex is set based on the shader-table layout specified in createShaderTable()
// Create the desc for the triangle/plane instance
instanceDescs[0].InstanceID = 0;
instanceDescs[0].InstanceContributionToHitGroupIndex = 0;
instanceDescs[0].Flags = (byte)RaytracingInstanceFlags.None;
instanceDescs[0].Transform = Matrix4x4.Transpose(transformation[0]).ToMatrix3x4(); // GLM is column major, the INSTANCE_DESC is row major
instanceDescs[0].AccelerationStructure = pBottomLevelAS[0].GPUVirtualAddress;
instanceDescs[0].InstanceMask = 0xFF;
for (int i = 1; i < 3; i++)
{
instanceDescs[i].InstanceID = i; // This value will be exposed to the shader via InstanceID()
instanceDescs[i].InstanceContributionToHitGroupIndex = (i * 2) + 2; // The plane takes an additional entry in the shader-table, hence the +1
instanceDescs[i].Flags = (byte)RaytracingInstanceFlags.None;
instanceDescs[i].Transform = Matrix4x4.Transpose(transformation[i]).ToMatrix3x4(); // GLM is column major, the INSTANCE_DESC is row major
instanceDescs[i].AccelerationStructure = pBottomLevelAS[1].GPUVirtualAddress;
instanceDescs[i].InstanceMask = 0xFF;
}
// Map the instance desc buffer
IntPtr data;
data = buffers.pInstanceDesc.Map(0, null);
Helpers.MemCpy(data, instanceDescs, (uint)Unsafe.SizeOf <FixedRaytracingInstanceDescription>() * 3);
buffers.pInstanceDesc.Unmap(0, null);
// Create the TLAS
BuildRaytracingAccelerationStructureDescription asDesc = new BuildRaytracingAccelerationStructureDescription();
asDesc.Inputs = inputs;
asDesc.Inputs.InstanceDescriptions = buffers.pInstanceDesc.GPUVirtualAddress;
asDesc.DestinationAccelerationStructureData = buffers.pResult.GPUVirtualAddress;
asDesc.ScratchAccelerationStructureData = buffers.pScratch.GPUVirtualAddress;
// If this is an update operation, set the source buffer and the perform_update flag
if (update)
{
asDesc.Inputs.Flags |= RaytracingAccelerationStructureBuildFlags.PerformUpdate;
asDesc.SourceAccelerationStructureData = buffers.pResult.GPUVirtualAddress;
}
pCmdList.BuildRaytracingAccelerationStructure(asDesc);
// We need to insert a UAV barrier before using the acceleration structures in a raytracing operation
ResourceBarrier uavBarrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(buffers.pResult));
pCmdList.ResourceBarrier(uavBarrier);
return(buffers);
}
public unsafe AccelerationStructureBuffers CreateTopLevelAS(ID3D12Device5 pDevice, ID3D12GraphicsCommandList4 pCmdList, AccelerationStructureBuffers[] pBottomLevelAS, ref long tlasSize)
{
int instances = 2;
// First, get the size of the TLAS buffers and create them
BuildRaytracingAccelerationStructureInputs inputs = new BuildRaytracingAccelerationStructureInputs();
inputs.Layout = ElementsLayout.Array;
inputs.Flags = RaytracingAccelerationStructureBuildFlags.None;
inputs.DescriptorsCount = instances;
inputs.Type = RaytracingAccelerationStructureType.TopLevel;
RaytracingAccelerationStructurePrebuildInfo info;
info = pDevice.GetRaytracingAccelerationStructurePrebuildInfo(inputs);
// Create the buffers
AccelerationStructureBuffers buffers = new AccelerationStructureBuffers();
buffers.pScratch = this.CreateBuffer(pDevice, (uint)info.ScratchDataSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.UnorderedAccess, kDefaultHeapProps);
buffers.pResult = this.CreateBuffer(pDevice, (uint)info.ResultDataMaxSizeInBytes, ResourceFlags.AllowUnorderedAccess, ResourceStates.RaytracingAccelerationStructure, kDefaultHeapProps);
tlasSize = info.ResultDataMaxSizeInBytes;
// The instance desc should be inside a buffer, create and map the buffer
buffers.pInstanceDesc = this.CreateBuffer(pDevice, (uint)(Unsafe.SizeOf <FixedRaytracingInstanceDescription>() * instances), ResourceFlags.None, ResourceStates.GenericRead, kUploadHeapProps);
FixedRaytracingInstanceDescription[] pInstanceDesc = new FixedRaytracingInstanceDescription[instances];
// The transformation matrices for the instances
Matrix4x4[] transformation = new Matrix4x4[instances];
transformation[0] = Matrix4x4.CreateTranslation(new Vector3(0, -1.0f, 0));
transformation[1] = Matrix4x4.CreateScale(2.0f);
pInstanceDesc[0].InstanceID = 0; // This value will be exposed to the shader via InstanceID()
pInstanceDesc[0].InstanceContributionToHitGroupIndex = 0; // This is the offset inside the shader-table. We only have a single geometry, so the offset 0
pInstanceDesc[0].Flags = (byte)RaytracingInstanceFlags.None;
pInstanceDesc[0].Transform = Matrix4x4.Transpose(transformation[0]).ToMatrix3x4(); // GLM is column major, the INSTANCE_DESC is row major
pInstanceDesc[0].AccelerationStructure = pBottomLevelAS[0].pResult.GPUVirtualAddress;
pInstanceDesc[0].InstanceMask = 0xff;
for (int i = 1; i < instances; i++)
{
pInstanceDesc[i].InstanceID = i; // This value will be exposed to the shader via InstanceID()
pInstanceDesc[i].InstanceContributionToHitGroupIndex = 0; // This is the offset inside the shader-table. We only have a single geometry, so the offset 0
pInstanceDesc[i].Flags = (byte)RaytracingInstanceFlags.None;
pInstanceDesc[i].Transform = Matrix4x4.Transpose(transformation[i]).ToMatrix3x4(); // GLM is column major, the INSTANCE_DESC is row major
pInstanceDesc[i].AccelerationStructure = pBottomLevelAS[1].pResult.GPUVirtualAddress;
pInstanceDesc[i].InstanceMask = 0xff;
}
IntPtr data;
data = buffers.pInstanceDesc.Map(0, null);
Helpers.MemCpy(data, pInstanceDesc, (uint)(Unsafe.SizeOf <FixedRaytracingInstanceDescription>() * instances));
buffers.pInstanceDesc.Unmap(0, null);
// Create the TLAS
BuildRaytracingAccelerationStructureDescription asDesc = new BuildRaytracingAccelerationStructureDescription();
asDesc.Inputs = inputs;
asDesc.Inputs.InstanceDescriptions = buffers.pInstanceDesc.GPUVirtualAddress;
asDesc.DestinationAccelerationStructureData = buffers.pResult.GPUVirtualAddress;
asDesc.ScratchAccelerationStructureData = buffers.pScratch.GPUVirtualAddress;
pCmdList.BuildRaytracingAccelerationStructure(asDesc);
// We need to insert a UAV barrier before using the acceleration structures in a raytracing operation
ResourceBarrier uavBarrier = new ResourceBarrier(new ResourceUnorderedAccessViewBarrier(buffers.pResult));
pCmdList.ResourceBarrier(uavBarrier);
return(buffers);
}
public void ResourceBarrier(ID3D12GraphicsCommandList4 pCmdLit, ID3D12Resource pResource, ResourceStates stateBefore, ResourceStates stateAfter)
{
ResourceBarrier barrier = new ResourceBarrier(new ResourceTransitionBarrier(pResource, stateBefore, stateAfter));
pCmdLit.ResourceBarrier(barrier);
}
public void ResourceBarrierAliasing(ID3D12Resource resourceBefore, ID3D12Resource resourceAfter)
{
var barrier = new ResourceBarrier(new ResourceAliasingBarrier(resourceBefore, resourceAfter));
ResourceBarrier(1, &barrier);
}