Package org.lwjgl.vulkan

Class KHRRayTracingPositionFetch

java.lang.Object

org.lwjgl.vulkan.KHRRayTracingPositionFetch

public final class KHRRayTracingPositionFetch
extends Object

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_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.

Name String

VK_KHR_ray_tracing_position_fetch

Extension Type

Device extension

Registered Extension Number

482

Revision

1

Extension and Version Dependencies

VK_KHR_acceleration_structure

SPIR-V Dependencies

• SPV_KHR_ray_tracing_position_fetch

Contact

• Eric Werness

Extension Proposal

VK_KHR_ray_tracing_position_fetch

Other Extension Metadata

Last Modified Date

2023-02-17

Interactions and External Dependencies

• This extension provides API support for GLSL_EXT_ray_tracing_position_fetch
• Interacts with VK_KHR_ray_tracing_pipeline
• Interacts with VK_KHR_ray_query

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

Field Summary

Fields

Modifier and Type	Field	Description
static final int	VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_DATA_ACCESS_KHR	Extends VkBuildAccelerationStructureFlagBitsKHR.
static final String	VK_KHR_RAY_TRACING_POSITION_FETCH_EXTENSION_NAME	The extension name.
static final int	VK_KHR_RAY_TRACING_POSITION_FETCH_SPEC_VERSION	The extension specification version.
static final int	VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_POSITION_FETCH_FEATURES_KHR	Extends VkStructureType.

Method Summary

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VK_KHR_RAY_TRACING_POSITION_FETCH_SPEC_VERSION

public static final int VK_KHR_RAY_TRACING_POSITION_FETCH_SPEC_VERSION

The extension specification version.

See Also:

• Constant Field Values

VK_KHR_RAY_TRACING_POSITION_FETCH_EXTENSION_NAME

public static final String VK_KHR_RAY_TRACING_POSITION_FETCH_EXTENSION_NAME

The extension name.

See Also:

• Constant Field Values

VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_POSITION_FETCH_FEATURES_KHR

public static final int VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_POSITION_FETCH_FEATURES_KHR

Extends VkStructureType.

See Also:

• Constant Field Values

VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_DATA_ACCESS_KHR

public static final int VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_DATA_ACCESS_KHR

Extends VkBuildAccelerationStructureFlagBitsKHR.

See Also:

• Constant Field Values