# VkGeometryFlagBitsKHR(3) Manual Page

## Name

VkGeometryFlagBitsKHR - Bitmask specifying additional parameters for a geometry

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## C Specification

Bits specifying additional parameters for geometries in acceleration structure builds, are:

    // Provided by VK_KHR_acceleration_structure
    typedef enum VkGeometryFlagBitsKHR {
        VK_GEOMETRY_OPAQUE_BIT_KHR = 0x00000001,
        VK_GEOMETRY_NO_DUPLICATE_ANY_HIT_INVOCATION_BIT_KHR = 0x00000002,
      // Provided by VK_NV_ray_tracing
        VK_GEOMETRY_OPAQUE_BIT_NV = VK_GEOMETRY_OPAQUE_BIT_KHR,
      // Provided by VK_NV_ray_tracing
        VK_GEOMETRY_NO_DUPLICATE_ANY_HIT_INVOCATION_BIT_NV = VK_GEOMETRY_NO_DUPLICATE_ANY_HIT_INVOCATION_BIT_KHR,
    } VkGeometryFlagBitsKHR;

or the equivalent

    // Provided by VK_NV_ray_tracing
    typedef VkGeometryFlagBitsKHR VkGeometryFlagBitsNV;

## Description

- `VK_GEOMETRY_OPAQUE_BIT_KHR` specifies that this geometry does not invoke the any-hit shaders even if present in a hit group.

- `VK_GEOMETRY_NO_DUPLICATE_ANY_HIT_INVOCATION_BIT_KHR` specifies that the implementation must only call the any-hit shader a single time for each primitive in this geometry. If this bit is absent an implementation may invoke the any-hit shader more than once for this geometry.

## See Also

VK_KHR_acceleration_structure, VK_NV_ray_tracing, VkGeometryFlagsKHR

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0