public void CreateRtPipelineState()
{
var rtpipeline = new RTPipeline();
// Need 10 subobjects:
// 1 for the DXIL library
// 1 for hit-group
// 2 for RayGen root-signature (root-signature and the subobject association)
// 2 for hit-program root-signature (root-signature and the subobject association)
// 2 for miss-shader root-signature (signature and association)
// 2 for shader config (shared between all programs. 1 for the config, 1 for association)
// 1 for pipeline config
// 1 for the global root signature
StateSubObject[] subobjects = new StateSubObject[12];
int index = 0;
// Create the DXIL library
DxilLibrary dxilLib = rtpipeline.CreateDxilLibrary();
subobjects[index++] = dxilLib.stateSubObject; // 0 Library
HitProgram hitProgram = new HitProgram(null, RTPipeline.kClosestHitShader, RTPipeline.kHitGroup);
subobjects[index++] = hitProgram.subObject; // 1 Hit Group
// Create the ray-gen root-signature and association
Structs.LocalRootSignature rgsRootSignature = new Structs.LocalRootSignature(mpDevice, rtpipeline.CreateRayGenRootDesc());
subobjects[index] = rgsRootSignature.subobject; // 2 RayGen Root Sig
int rgsRootIndex = index++; // 2
ExportAssociation rgsRootAssociation = new ExportAssociation(new string[] { RTPipeline.kRayGenShader }, subobjects[rgsRootIndex]);
subobjects[index++] = rgsRootAssociation.subobject; // 3 Associate Root Sig to RGS
// Create the hit root-signature and association
Structs.LocalRootSignature hitRootSignature = new Structs.LocalRootSignature(mpDevice, rtpipeline.CreateHitRootDesc());
subobjects[index] = hitRootSignature.subobject; // 4 Hit Root Sig
int hitRootIndex = index++; // 4
ExportAssociation hitRootAssociation = new ExportAssociation(new string[] { RTPipeline.kClosestHitShader }, subobjects[hitRootIndex]); // 5 Associate Hit Root Sig to Hit Group
subobjects[index++] = hitRootAssociation.subobject; // 6 Associate Hit Root Sig to Hit Group
// Create the miss root-signature and association
RootSignatureDescription emptyDesc = new RootSignatureDescription(RootSignatureFlags.LocalRootSignature);
Structs.LocalRootSignature missRootSignature = new Structs.LocalRootSignature(mpDevice, emptyDesc);
subobjects[index] = missRootSignature.subobject; // 6 Miss Root Sig
int missRootIndex = index++; // 6
ExportAssociation missRootAssociation = new ExportAssociation(new string[] { RTPipeline.kMissShader }, subobjects[missRootIndex]);
subobjects[index++] = missRootAssociation.subobject; // 7 Associate Miss Root Sig to Miss Shader
// Bind the payload size to the programs
ShaderConfig shaderConfig = new ShaderConfig(sizeof(float) * 2, sizeof(float) * 4);
subobjects[index] = shaderConfig.subObject; // 8 Shader Config;
int shaderConfigIndex = index++; // 8
string[] shaderExports = new string[] { RTPipeline.kMissShader, RTPipeline.kClosestHitShader, RTPipeline.kRayGenShader };
ExportAssociation configAssociation = new ExportAssociation(shaderExports, subobjects[shaderConfigIndex]);
subobjects[index++] = configAssociation.subobject; // 9 Associate Shader Config to Miss, CHS, RGS
// Create the pipeline config
PipelineConfig config = new PipelineConfig(1);
subobjects[index++] = config.suboject; // 10
// Create the global root signature and store the empty signature
Structs.GlobalRootSignature root = new Structs.GlobalRootSignature(mpDevice, new RootSignatureDescription());
mpEmptyRootSig = root.pRootSig.RootSignature;
subobjects[index++] = root.suboject; // 11
// Create the state
StateObjectDescription desc = new StateObjectDescription(StateObjectType.RaytracingPipeline, subobjects);
mpPipelineState = mpDevice.CreateStateObject(desc);
}
public void CreateRtPipelineState()
{
var rtpipeline = new RTPipeline();
// Need 10 subobjects:
// 1 for the DXIL library
// 1 for hit-group
// 2 for the hit-groups (triangle hit group, plane hit-group)
// 2 for RayGen root-signature (root-signature and the subobject association)
// 2 for triangle hit-program root-signature (root-signature and the subobject association)
// 2 for plane hit-program and miss-shader root-signature (signature and association)
// 2 for shader config (shared between all programs. 1 for the config, 1 for association)
// 1 for pipeline config
// 1 for the global root signature
StateSubObject[] subobjects = new StateSubObject[13];
int index = 0;
// Create the DXIL library
DxilLibrary dxilLib = rtpipeline.CreateDxilLibrary();
subobjects[index++] = dxilLib.stateSubObject; // 0 Library
// Create the triangle HitProgram
HitProgram triHitProgram = new HitProgram(null, RTPipeline.kTriangleChs, RTPipeline.kTriHitGroup);
subobjects[index++] = triHitProgram.subObject; // 1 Triangle Hit Group
// Create the plane HitProgram
HitProgram planeHitProgram = new HitProgram(null, RTPipeline.kPlaneChs, RTPipeline.kPlaneHitGroup);
subobjects[index++] = planeHitProgram.subObject; // 2 Plane Hit Group
// Create the ray-gen root-signature and association
Structs.LocalRootSignature rgsRootSignature = new Structs.LocalRootSignature(mpDevice, rtpipeline.CreateRayGenRootDesc());
subobjects[index] = rgsRootSignature.subobject; // 3 RayGen Root Sig
int rgsRootIndex = index++; // 3
ExportAssociation rgsRootAssociation = new ExportAssociation(new string[] { RTPipeline.kRayGenShader }, subobjects[rgsRootIndex]);
subobjects[index++] = rgsRootAssociation.subobject; // 4 Associate Root Sig to RGS
// Create the tri hit root-signature and association
Structs.LocalRootSignature triHitRootSignature = new Structs.LocalRootSignature(mpDevice, rtpipeline.CreateTriangleHitRootDesc());
subobjects[index] = triHitRootSignature.subobject; // 5 Triangle Hit Root Sig
int triHitRootIndex = index++; // 5
ExportAssociation triHitRootAssociation = new ExportAssociation(new string[] { RTPipeline.kTriangleChs }, subobjects[triHitRootIndex]); // 5 Associate Hit Root Sig to Hit Group
subobjects[index++] = triHitRootAssociation.subobject; // 6 Associate Hit Root Sig to Hit Group
// Create the empty root-signature and association it with the plane hit-program and miss-shader
RootSignatureDescription emptyDesc = new RootSignatureDescription(RootSignatureFlags.LocalRootSignature);
Structs.LocalRootSignature emptyRootSignature = new Structs.LocalRootSignature(mpDevice, emptyDesc);
subobjects[index] = emptyRootSignature.subobject; // 7 Miss Root Sig for Plane Hit Group and Miss
int emptyRootIndex = index++; // 7
ExportAssociation emptyRootAssociation = new ExportAssociation(new string[] { RTPipeline.kPlaneChs, RTPipeline.kMissShader }, subobjects[emptyRootIndex]);
subobjects[index++] = emptyRootAssociation.subobject; // 8 Associate empty Root Sig to Plane Hit Group and Miss Shader
// Bind the payload size to the programs
ShaderConfig shaderConfig = new ShaderConfig(sizeof(float) * 2, sizeof(float) * 3);
subobjects[index] = shaderConfig.subObject; // 9 Shader Config;
int shaderConfigIndex = index++; // 9
string[] shaderExports = new string[] { RTPipeline.kMissShader, RTPipeline.kTriangleChs, RTPipeline.kPlaneChs, RTPipeline.kRayGenShader };
ExportAssociation configAssociation = new ExportAssociation(shaderExports, subobjects[shaderConfigIndex]);
subobjects[index++] = configAssociation.subobject; // 10 Associate Shader Config to all shaders and hit groups
// Create the pipeline config
PipelineConfig config = new PipelineConfig(1);
subobjects[index++] = config.suboject; // 11
// Create the global root signature and store the empty signature
Structs.GlobalRootSignature root = new Structs.GlobalRootSignature(mpDevice, new RootSignatureDescription());
mpEmptyRootSig = root.pRootSig.RootSignature;
subobjects[index++] = root.suboject; // 12
// Create the state
StateObjectDescription desc = new StateObjectDescription(StateObjectType.RaytracingPipeline, subobjects);
mpPipelineState = mpDevice.CreateStateObject(desc);
}