VkAccelerationStructureTypeKHR(3)

# VkAccelerationStructureTypeKHR(3) Manual Page

## Name

VkAccelerationStructureTypeKHR - Type of acceleration structure

Loading… please wait.

## C Specification

Values which can be set in VkAccelerationStructureCreateInfoKHR::`type` or VkAccelerationStructureInfoNV::`type` specifying the type of acceleration structure, are:

    // Provided by VK_KHR_acceleration_structure
    typedef enum VkAccelerationStructureTypeKHR {
        VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR = 0,
        VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR = 1,
        VK_ACCELERATION_STRUCTURE_TYPE_GENERIC_KHR = 2,
      // Provided by VK_NV_ray_tracing
        VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_NV = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR,
      // Provided by VK_NV_ray_tracing
        VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_NV = VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR,
    } VkAccelerationStructureTypeKHR;

or the equivalent

    // Provided by VK_NV_ray_tracing
    typedef VkAccelerationStructureTypeKHR VkAccelerationStructureTypeNV;

## Description

- `VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR` is a top-level acceleration structure containing instance data referring to bottom-level acceleration structures.

- `VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR` is a bottom-level acceleration structure containing the AABBs or geometry to be intersected.

- `VK_ACCELERATION_STRUCTURE_TYPE_GENERIC_KHR` is an acceleration structure whose type is determined at build time used for special circumstances.

## See Also

VK_KHR_acceleration_structure, VK_NV_ray_tracing, VkAccelerationStructureBuildGeometryInfoKHR, VkAccelerationStructureCreateInfoKHR, VkAccelerationStructureInfoNV

## 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 2014-2022 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0