vkGetAccelerationStructureHandleNV(3)

# vkGetAccelerationStructureHandleNV(3) Manual Page

## Name

vkGetAccelerationStructureHandleNV - Get opaque acceleration structure handle

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## C Specification

To allow constructing geometry instances with device code if desired, we need to be able to query a opaque handle for an acceleration structure. This handle is a value of 8 bytes. To get this handle, call:

    // Provided by VK_NV_ray_tracing
    VkResult vkGetAccelerationStructureHandleNV(
        VkDevice                                    device,
        VkAccelerationStructureKHR                  accelerationStructure,
        size_t                                      dataSize,
        void*                                       pData);

## Parameters

- `device` is the logical device that owns the acceleration structures.

- `accelerationStructure` is the acceleration structure.

- `dataSize` is the size in bytes of the buffer pointed to by `pData`.

- `pData` is a pointer to a user-allocated buffer where the results will be written.

## Description

Valid Usage

- VUID-vkGetAccelerationStructureHandleNV-dataSize-02240
  `dataSize` must be large enough to contain the result of the query, as described above

- VUID-vkGetAccelerationStructureHandleNV-accelerationStructure-02787
  `accelerationStructure` must be bound completely and contiguously to a single `VkDeviceMemory` object via vkBindAccelerationStructureMemoryKHR

Valid Usage (Implicit)

- VUID-vkGetAccelerationStructureHandleNV-device-parameter
  `device` must be a valid VkDevice handle

- VUID-vkGetAccelerationStructureHandleNV-accelerationStructure-parameter
  `accelerationStructure` must be a valid VkAccelerationStructureKHR handle

- VUID-vkGetAccelerationStructureHandleNV-pData-parameter
  `pData` must be a valid pointer to an array of `dataSize` bytes

- VUID-vkGetAccelerationStructureHandleNV-dataSize-arraylength
  `dataSize` must be greater than `0`

- VUID-vkGetAccelerationStructureHandleNV-accelerationStructure-parent
  `accelerationStructure` must have been created, allocated, or retrieved from `device`

Return Codes

On success, this command returns

  - `VK_SUCCESS`

On failure, this command returns

  - `VK_ERROR_OUT_OF_HOST_MEMORY`

  - `VK_ERROR_OUT_OF_DEVICE_MEMORY`

## See Also

VkAccelerationStructureKHR, VkDevice

## 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 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0