C Specification

VkAccelerationStructureBuildRangeInfoKHR is defined as:

// Provided by VK_KHR_acceleration_structure
typedef struct VkAccelerationStructureBuildRangeInfoKHR {
    uint32_t    primitiveCount;
    uint32_t    primitiveOffset;
    uint32_t    firstVertex;
    uint32_t    transformOffset;
} VkAccelerationStructureBuildRangeInfoKHR;


  • primitiveCount defines the number of primitives for a corresponding acceleration structure geometry.

  • primitiveOffset defines an offset in bytes into the memory where primitive data is defined.

  • firstVertex is the index of the first vertex to build from for triangle geometry.

  • transformOffset defines an offset in bytes into the memory where a transform matrix is defined.


The primitive count and primitive offset are interpreted differently depending on the VkGeometryTypeKHR used:

Valid Usage

See Also

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 2014-2021 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0