add instance id for BLAS in TLAS.

LinkClinton · Nov 1, 2023 · dfb70c7 · dfb70c7
1 parent 4b032d3
commit dfb70c7
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/raytracings/accleration.cpp b/raytracings/accleration.cpp
@@ -97,8 +97,8 @@ wrapper::directx12::raytracing_acceleration wrapper::directx12::raytracing_accel
 		auto& desc = instances_desc[index];
 
 		desc.Flags = D3D12_RAYTRACING_INSTANCE_FLAG_FORCE_OPAQUE;
-		desc.InstanceID = static_cast<UINT>(index);
-		desc.InstanceContributionToHitGroupIndex = static_cast<UINT>(index);
+		desc.InstanceID = static_cast<UINT>(instances[index].identity);
+		desc.InstanceContributionToHitGroupIndex = static_cast<UINT>(instances[index].identity);
 		desc.AccelerationStructure = instances[index].geometry.acceleration()->GetGPUVirtualAddress();
 		desc.InstanceMask = 0xff;
 

diff --git a/raytracings/accleration.hpp b/raytracings/accleration.hpp
@@ -28,6 +28,8 @@ namespace wrapper::directx12
 	{
 		raytracing_geometry geometry;
 
+		uint32 identity;
+
 		real transform[3][4];
 	};