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GHC 9.14.1 · lts/ghc-9.14.x · 45dd537 · 2026-10-11

Modulevulkan-3.27GHC2021

Vulkan.Extensions.VK_KHR_ray_tracing_position_fetch

Name

VK_KHR_ray_tracing_position_fetch - device extension

VK_KHR_ray_tracing_position_fetch

Name String

VK_KHR_ray_tracing_position_fetch

Extension Type

Device extension

Registered Extension Number

482

Revision

1

Ratification Status

Ratified

Extension and Version Dependencies

VK_KHR_acceleration_structure

SPIR-V Dependencies
Contact

  • Eric Werness

Extension Proposal

VK_KHR_ray_tracing_position_fetch

Other Extension Metadata

Last Modified Date

2023-02-17

Interactions and External Dependencies
Contributors

  • Eric Werness, NVIDIA

  • Stu Smith, AMD

  • Yuriy O’Donnell, Epic Games

  • Ralph Potter, Samsung

  • Joshua Barczak, Intel

  • Lionel Landwerlin, Intel

  • Andrew Garrard, Imagination Technologies

  • Alex Bourd, Qualcomm

  • Yunpeng Zhu, Huawei Technologies

  • Marius Bjorge, Arm

  • Daniel Koch, NVIDIA

Description

VK_KHR_ray_tracing_position_fetch adds the ability to fetch the vertex positions in the shader from a hit triangle as stored in the acceleration structure.

An application adds BUILD_ACCELERATION_STRUCTURE_ALLOW_DATA_ACCESS_BIT_KHR to the acceleration structure at build time. Then, if the hit is a triangle geometry, the shader (any-hit or closest hit for ray pipelines or using ray query) can fetch the three, three-component vertex positions in object space, of the triangle which was hit.

New Structures

New Enum Constants

New Built-In Variables

New SPIR-V Capabilities

Issues

None Yet!

Version History

  • Revision 1, 2023-02-17 (Eric Werness)

    • internal revisions

See Also

No cross-references are available

Document Notes

For more information, see the Vulkan Specification.

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

  • 5 types
  • Packagevulkan-3.27
  • Exports20
  • LanguageGHC2021
  • LicenceBSD-3-Clause
  • SourceVK_KHR_ray_tracing_position_fetch.hs
datadata PhysicalDeviceRayTracingPositionFetchFeaturesKHR
#

VkPhysicalDeviceRayTracingPositionFetchFeaturesKHR - Structure describing support for fetching vertex positions of hit triangles

Members

This structure describes the following feature:

Description

If the PhysicalDeviceRayTracingPositionFetchFeaturesKHR structure is included in the pNext chain of the PhysicalDeviceFeatures2 structure passed to getPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. If the application wishes to use a Device with any features described by PhysicalDeviceRayTracingPositionFetchFeaturesKHR, it must add an instance of the structure, with the desired feature members set to TRUE, to the pNext chain of DeviceCreateInfo when creating the Device.

Structure Chaining

Extends the structures

See Also

VK_KHR_ray_tracing_position_fetch, Bool32, StructureType

Constructors

Instances6Eq, Show, Storable, FromCStruct, ToCStruct, Zero
newtypenewtype BuildAccelerationStructureFlagBitsKHR
#

VkBuildAccelerationStructureFlagBitsKHR - Bitmask specifying additional parameters for acceleration structure builds

Description

BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR and BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHR may take more time and memory than a normal build, and so should only be used when those features are needed.

BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR and BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHR are allowed to be used together. In that case, the result of the compaction copy is used as the source of a build with mode of BUILD_ACCELERATION_STRUCTURE_MODE_UPDATE_KHR to perform the compacted update.

See Also

VK_KHR_acceleration_structure, VK_NV_ray_tracing, BuildAccelerationStructureFlagsKHR

Constructors

Instances8Eq, Ord, Read, Show, Bits, FiniteBits, …