Description

HitTriangleVertexPositionsKHR

A variable decorated with the HitTriangleVertexPositionsKHR decoration will specify the object space vertices of the triangle at the current intersection in application-provided order. The positions returned are transformed by the geometry transform, which is performed at standard floating point precision, but without a specifically defined order of floating point operations to perform the matrix multiplication.

Valid Usage

  • VUID-HitTriangleVertexPositionsKHR-HitTriangleVertexPositionsKHR-08747
    The HitTriangleVertexPositionsKHR decoration must be used only within the AnyHitKHR or ClosestHitKHR Execution Model

  • VUID-HitTriangleVertexPositionsKHR-HitTriangleVertexPositionsKHR-08748
    The variable decorated with HitTriangleVertexPositionsKHR must be declared using the Input Storage Class

  • VUID-HitTriangleVertexPositionsKHR-HitTriangleVertexPositionsKHR-08749
    The variable decorated with HitTriangleVertexPositionsKHR must be declared as an array of three vectors of three 32-bit float values

  • VUID-HitTriangleVertexPositionsKHR-HitTriangleVertexPositionsKHR-08750
    The variable decorated with HitTriangleVertexPositionsKHR must be used only if the value of HitKindKHR is HitKindFrontFacingTriangleKHR or HitKindBackFacingTriangleKHR

  • VUID-HitTriangleVertexPositionsKHR-None-08751
    The acceleration structure corresponding to the current intersection must have been built with VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_DATA_ACCESS_KHR

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