# VkOpacityMicromapSpecialIndexEXT(3) Manual Page

## Name

VkOpacityMicromapSpecialIndexEXT - Enum for special indices in the opacity micromap

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## C Specification

The `VkOpacityMicromapSpecialIndexEXT` enumeration is defined as:

    // Provided by VK_EXT_opacity_micromap
    typedef enum VkOpacityMicromapSpecialIndexEXT {
        VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_TRANSPARENT_EXT = -1,
        VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_OPAQUE_EXT = -2,
        VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_TRANSPARENT_EXT = -3,
        VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_OPAQUE_EXT = -4,
    } VkOpacityMicromapSpecialIndexEXT;

## Description

- `VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_TRANSPARENT_EXT` specifies that the entire triangle is fully transparent.

- `VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_OPAQUE_EXT` specifies that the entire triangle is fully opaque.

- `VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_TRANSPARENT_EXT` specifies that the entire triangle is unknown-transparent.

- `VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_OPAQUE_EXT` specifies that the entire triangle is unknown-opaque.

## See Also

VK_EXT_opacity_micromap

## 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