# VkAccelerationStructureMemoryRequirementsTypeKHR(3) Manual Page

## Name

VkAccelerationStructureMemoryRequirementsTypeKHR - Acceleration structure memory requirement type

## C Specification

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

    typedef enum VkAccelerationStructureMemoryRequirementsTypeKHR {
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_KHR = 0,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_KHR = 1,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_KHR = 2,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_NV = VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_KHR,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_NV = VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_KHR,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_NV = VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_KHR,
        VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_MAX_ENUM_KHR = 0x7FFFFFFF
    } VkAccelerationStructureMemoryRequirementsTypeKHR;

or the equivalent

    typedef VkAccelerationStructureMemoryRequirementsTypeKHR VkAccelerationStructureMemoryRequirementsTypeNV;

## Description

- `VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_KHR` requests the memory requirement for the `VkAccelerationStructureKHR` backing store.

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

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

## See Also

VkAccelerationStructureMemoryRequirementsInfoKHR

## 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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.