C Specification

To determine the memory requirements for a PTAS, call:

// Provided by VK_NV_partitioned_acceleration_structure
void vkGetPartitionedAccelerationStructuresBuildSizesNV(
    VkDevice                                    device,
    const VkPartitionedAccelerationStructureInstancesInputNV* pInfo,
    VkAccelerationStructureBuildSizesInfoKHR*   pSizeInfo);

Parameters

  • device is the logical device that owns the acceleration structure.

  • pInfo is a pointer to a VkPartitionedAccelerationStructureInstancesInputNV structure containing parameters required for the memory requirements query.

  • pSizeInfo is a pointer to a VkAccelerationStructureBuildSizesInfoKHR structure which returns the size required for an acceleration structure and the sizes required for the scratch buffers, given the build parameters. The size requirements for a scratch buffer may be zero.

Description

Valid Usage
Valid Usage (Implicit)

See Also

VK_NV_partitioned_acceleration_structure, VkAccelerationStructureBuildSizesInfoKHR, VkDevice, VkPartitionedAccelerationStructureInstancesInputNV

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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0