# VkAccelerationStructureMemoryRequirementsTypeNV(3) Manual Page

## Name

VkAccelerationStructureMemoryRequirementsTypeNV - Acceleration structure memory requirement type

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## C Specification

Possible values of `type` in `VkAccelerationStructureMemoryRequirementsInfoNV` are:,

    // Provided by VK_NV_ray_tracing
    typedef enum VkAccelerationStructureMemoryRequirementsTypeNV {
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_NV = 0,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_NV = 1,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_NV = 2,
    } VkAccelerationStructureMemoryRequirementsTypeNV;

## Description

- `VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_NV` requests the memory requirement for the `VkAccelerationStructureNV` backing store.

- `VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_NV` requests the memory requirement for scratch space during the initial build.

- `VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_NV` requests the memory requirement for scratch space during an update.

## See Also

VK_NV_ray_tracing, VkAccelerationStructureMemoryRequirementsInfoNV

## 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