VkAccelerationStructureBuildSizesInfoKHR(3)

Name

VkAccelerationStructureBuildSizesInfoKHR - Structure specifying build sizes for an acceleration structure

C Specification

The VkAccelerationStructureBuildSizesInfoKHR structure describes the required build sizes for an acceleration structure and scratch buffers and is defined as:

// Provided by VK_KHR_acceleration_structure
typedef struct VkAccelerationStructureBuildSizesInfoKHR {
    VkStructureType    sType;
    void*              pNext;
    VkDeviceSize       accelerationStructureSize;
    VkDeviceSize       updateScratchSize;
    VkDeviceSize       buildScratchSize;
} VkAccelerationStructureBuildSizesInfoKHR;

Members

  • sType is a VkStructureType value identifying this structure.

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

  • accelerationStructureSize is the size in bytes required in a VkAccelerationStructureKHR for a build or update operation.

  • updateScratchSize is the size in bytes required in a scratch buffer for an update operation.

  • buildScratchSize is the size in bytes required in a scratch buffer for a build operation.

Description

Acceleration structure objects that represent micromaps cannot be the target for update commands. Implementations must set updateScratchSize equal to 0 if the pBuildInfo->type is VK_ACCELERATION_STRUCTURE_TYPE_OPACITY_MICROMAP_KHR.

Valid Usage (Implicit)

See Also

VK_KHR_acceleration_structure, VkDeviceSize, VkStructureType, vkGetAccelerationStructureBuildSizesKHR, vkGetClusterAccelerationStructureBuildSizesNV, vkGetPartitionedAccelerationStructuresBuildSizesNV

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.