C Specification

The VkWriteDescriptorSetAccelerationStructureKHR structure is defined as:

// Provided by VK_KHR_ray_tracing
typedef struct VkWriteDescriptorSetAccelerationStructureKHR {
    VkStructureType                      sType;
    const void*                          pNext;
    uint32_t                             accelerationStructureCount;
    const VkAccelerationStructureKHR*    pAccelerationStructures;
} VkWriteDescriptorSetAccelerationStructureKHR;

or the equivalent

// Provided by VK_NV_ray_tracing
typedef VkWriteDescriptorSetAccelerationStructureKHR VkWriteDescriptorSetAccelerationStructureNV;


  • sType is the type of this structure.

  • pNext is NULL or a pointer to a structure extending this structure.

  • accelerationStructureCount is the number of elements in pAccelerationStructures.

  • pAccelerationStructures are the acceleration structures to update.


Valid Usage
  • accelerationStructureCount must be equal to descriptorCount in the extended structure

  • Each acceleration structure in pAccelerationStructures must have been created with VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR

Valid Usage (Implicit)

  • pAccelerationStructures must be a valid pointer to an array of accelerationStructureCount valid VkAccelerationStructureKHR handles

  • accelerationStructureCount must be greater than 0

See Also

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 (c) 2014-2020 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0