Description

InstanceCustomIndexKHR

A variable decorated with the InstanceCustomIndexKHR decoration will contain the application-defined value of the instance that intersects the current ray. This variable contains the value that was specified in VkAccelerationStructureInstanceKHR::instanceCustomIndex for the current acceleration structure instance in the lower 24 bits and the upper 8 bits will be zero.

Valid Usage

  • VUID-InstanceCustomIndexKHR-InstanceCustomIndexKHR-04251
    The InstanceCustomIndexKHR decoration must be used only within the IntersectionKHR, AnyHitKHR, or ClosestHitKHR Execution Model

  • VUID-InstanceCustomIndexKHR-InstanceCustomIndexKHR-04252
    The variable decorated with InstanceCustomIndexKHR must be declared using the Input Storage Class

  • VUID-InstanceCustomIndexKHR-InstanceCustomIndexKHR-04253
    The variable decorated with InstanceCustomIndexKHR must be declared as a scalar 32-bit integer value

See Also

No cross-references are available

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