# VkAccelerationStructureGeometryInstancesDataKHR(3) Manual Page

## Name

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

## C Specification

The `VkAccelerationStructureGeometryInstancesDataKHR` structure is defined as:

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

## Members

- `sType` is the type of this structure.

- `pNext` is `NULL` or a pointer to an extension-specific 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 if `arrayOfPointers` is `VK_TRUE`, or the address of an array of VkAccelerationStructureInstanceKHR structures.

## Description

Valid Usage

- `data` must be aligned to `16` bytes

- If `arrayOfPointers` is true, each pointer must be aligned to `16` bytes

Valid Usage (Implicit)

- `sType` must be `VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR`

- `pNext` must be `NULL`

- `data` must be a valid VkDeviceOrHostAddressConstKHR union

## See Also

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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.