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# EmitRaytracingAccelerationStructurePostbuildInfo

> Emits post-build properties for a set of acceleration structures. This enables applications to know the output resource requirements for performing.

Emits post-build properties for a set of acceleration structures. This enables applications to know the output resource requirements for performing acceleration structure operations via [ID3D12GraphicsCommandList4::CopyRaytracingAccelerationStructure](/reference/graphics/d3d12/interfaces/id3d12graphicscommandlist4/methods/id3d12graphicscommandlist4_copyraytracingaccelerationstructure_public).

## Syntax

```cpp theme={null}
void EmitRaytracingAccelerationStructurePostbuildInfo(
    const D3D12_RAYTRACING_ACCELERATION_STRUCTURE_POSTBUILD_INFO_DESC  pDesc,
    UINT NumSourceAccelerationStructures,
    const D3D12_GPU_VIRTUAL_ADDRESS  pSourceAccelerationStructureData
)
```

### Parameters

*pDesc \[in]*\
Type: const D3D12\_RAYTRACING\_ACCELERATION\_STRUCTURE\_POSTBUILD\_INFO\_DESC \*

A [D3D12\_RAYTRACING\_ACCELERATION\_STRUCTURE\_POSTBUILD\_INFO\_DESC](/reference/graphics/d3d12/structs/d3d12_raytracing_acceleration_structure_postbuild_info_desc_public) object describing post-build information to generate.

*NumSourceAccelerationStructures \[in]*\
Type: UINT

Number of pointers to acceleration structure GPU virtual addresses pointed to by <i>pSourceAccelerationStructureData</i>.  This number also affects the destination (output), which will be a contiguous array of **NumSourceAccelerationStructures** output structures, where the type of the structures depends on <i>InfoType</i> field of the supplied in the <i>pDesc</i> description.

*pSourceAccelerationStructureData \[in]*\
Type: const D3D12\_GPU\_VIRTUAL\_ADDRESS \*

Pointer to array of GPU virtual addresses of size <i>NumSourceAccelerationStructures</i>.

The address must be aligned to 256 bytes, defined as [D3D12\_RAYTRACING\_ACCELERATION\_STRUCTURE\_BYTE\_ALIGNMENT](https://learn.microsoft.com/en-us/windows/desktop/direct3d12/constants).

The memory pointed to must be in state [D3D12\_RESOURCE\_STATE\_RAYTRACING\_ACCELERATION\_STRUCTURE](/reference/graphics/d3d12_x/enums/d3d12_resource_states).

### Return value

Type: void

None.

## Remarks

This method can be called from graphics or compute command lists but not from bundles.

## Requirements

**Header:** d3d12\_xs.h\
**Library:** d3d12\_xs.lib\
**Supported Platforms**: XBOX Series consoles

## See Also

[ID3D12GraphicsCommandList4](/reference/graphics/d3d12_xs/interfaces/ID3D12GraphicsCommandList4/id3d12graphicscommandlist4)


## Related topics

- [D3D12_RAYTRACING_ACCELERATION_STRUCTURE_POSTBUILD_INFO_DESC](/reference/graphics/d3d12/structs/d3d12_raytracing_acceleration_structure_postbuild_info_desc_public.md)
- [BuildRaytracingAccelerationStructure (XBOX Series consoles)](/reference/graphics/d3d12/interfaces/id3d12graphicscommandlist4/methods/id3d12graphicscommandlist4_buildraytracingaccelerationstructure_public.md)
- [CopyRaytracingAccelerationStructure (XBOX Series consoles)](/reference/graphics/d3d12/interfaces/id3d12graphicscommandlist4/methods/id3d12graphicscommandlist4_copyraytracingaccelerationstructure_public.md)
- [NDA topic directory - live Microsoft Learn links](/nda/nda-topic-directory.md)
- [D3D12_RAYTRACING_ACCELERATION_STRUCTURE_POSTBUILD_INFO_CURRENT_SIZE_DESC (XBOX Series consoles)](/reference/graphics/d3d12/structs/d3d12_raytracing_acceleration_structure_postbuild_info_current_size_desc_public.md)