# VkAccelerationStructureGeometryInstancesDataKHR(3) Manual Page

## Name

VkAccelerationStructureGeometryInstancesDataKHR - Structure specifying a geometry consisting of instances of other acceleration structures

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## C Specification

The `VkAccelerationStructureGeometryInstancesDataKHR` structure is defined as:

    // Provided by VK_KHR_acceleration_structure
    typedef struct VkAccelerationStructureGeometryInstancesDataKHR {
        VkStructureType                  sType;
        const void*                      pNext;
        VkBool32                         arrayOfPointers;
        VkDeviceOrHostAddressConstKHR    data;
    } VkAccelerationStructureGeometryInstancesDataKHR;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `arrayOfPointers` specifies whether `data` is used as an array of addresses or just an array.

- `data` is either the address of an array of device or host addresses referencing individual VkAccelerationStructureInstanceKHR structures or packed motion instance information as described in motion instances if `arrayOfPointers` is `VK_TRUE`, or the address of an array of VkAccelerationStructureInstanceKHR or VkAccelerationStructureMotionInstanceNV structures. Addresses and VkAccelerationStructureInstanceKHR structures are tightly packed. VkAccelerationStructureMotionInstanceNV structures have a stride of 160 bytes.

## Description

Valid Usage (Implicit)

- VUID-VkAccelerationStructureGeometryInstancesDataKHR-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR`

- VUID-VkAccelerationStructureGeometryInstancesDataKHR-pNext-pNext
  `pNext` must be `NULL`

## See Also

VK_KHR_acceleration_structure, VkAccelerationStructureGeometryDataKHR, VkBool32, VkDeviceOrHostAddressConstKHR, VkStructureType

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0