# VkPhysicalDeviceClusterAccelerationStructurePropertiesNV(3) Manual Page

## Name

VkPhysicalDeviceClusterAccelerationStructurePropertiesNV - Structure describing properties supported by a cluster acceleration structure implementation

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## C Specification

The `VkPhysicalDeviceClusterAccelerationStructurePropertiesNV` structure is defined as:

    // Provided by VK_NV_cluster_acceleration_structure
    typedef struct VkPhysicalDeviceClusterAccelerationStructurePropertiesNV {
        VkStructureType    sType;
        void*              pNext;
        uint32_t           maxVerticesPerCluster;
        uint32_t           maxTrianglesPerCluster;
        uint32_t           clusterScratchByteAlignment;
        uint32_t           clusterByteAlignment;
        uint32_t           clusterTemplateByteAlignment;
        uint32_t           clusterBottomLevelByteAlignment;
        uint32_t           clusterTemplateBoundsByteAlignment;
        uint32_t           maxClusterGeometryIndex;
    } VkPhysicalDeviceClusterAccelerationStructurePropertiesNV;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `maxVerticesPerCluster` indicates the maximum number of unique vertices that can be specified in the index buffer for a cluster.

- `maxTrianglesPerCluster` indicates the maximum number of triangles in a cluster.

- `clusterScratchByteAlignment` indicates the alignment required for scratch memory used in building or moving cluster acceleration structures.

- `clusterByteAlignment` indicates the alignment of buffers when building cluster acceleration structures.

- `clusterTemplateByteAlignment` indicates the alignment of buffers when building cluster templates.

- `clusterBottomLevelByteAlignment` indicates the alignment of buffers when building bottom level acceleration structures.

- `clusterTemplateBoundsByteAlignment` indicates the alignment of VkClusterAccelerationStructureBuildTriangleClusterTemplateInfoNV::pname::instantiationBoundingBoxLimit.

- `maxClusterGeometryIndex` indicates the maximum geometry index possible for a triangle in an cluster acceleration structures.

## Description

If the `VkPhysicalDeviceClusterAccelerationStructurePropertiesNV` structure is included in the `pNext` chain of the VkPhysicalDeviceProperties2 structure passed to vkGetPhysicalDeviceProperties2, it is filled in with each corresponding implementation-dependent property.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceClusterAccelerationStructurePropertiesNV-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CLUSTER_ACCELERATION_STRUCTURE_PROPERTIES_NV`

## See Also

VK_NV_cluster_acceleration_structure, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0