# BaryCoordNoPerspSampleAMD(3) Manual Page

## Name

BaryCoordNoPerspSampleAMD - Barycentric coordinates of a sample center in screen-space

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## Description

`BaryCoordNoPerspSampleAMD`

  The `BaryCoordNoPerspSampleAMD` decoration can be used to decorate a fragment shader input variable. This variable will contain the (I,J) pair of the barycentric coordinates corresponding to the fragment evaluated using linear interpolation at each covered sample. The K coordinate of the barycentric coordinates can be derived given the identity I + J + K = 1.0.

Valid Usage

- VUID-BaryCoordNoPerspSampleAMD-BaryCoordNoPerspSampleAMD-04166
  The `BaryCoordNoPerspSampleAMD` decoration must be used only within the `Fragment` `Execution` `Model`

- VUID-BaryCoordNoPerspSampleAMD-BaryCoordNoPerspSampleAMD-04167
  The variable decorated with `BaryCoordNoPerspSampleAMD` must be declared using the `Input` `Storage` `Class`

- VUID-BaryCoordNoPerspSampleAMD-BaryCoordNoPerspSampleAMD-04168
  The variable decorated with `BaryCoordNoPerspSampleAMD` must be declared as a two-component vector of 32-bit floating-point values

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0