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# docs.GL

GLSL 4
GLSL ES 3

# gl_PointCoord

## Name

gl_PointCoord — contains the coordinate of a fragment within a point

## Declaration

`in mediump vec2 gl_PointCoord ;`

## Description

`gl_PointCoord` is a fragment language input variable that contains the two-dimensional coordinates indicating where within a point primitive the current fragment is located. If the current primitive is not a point, then values read from `gl_PointCoord` are undefined.

`gl_PointCoord.s` ranges from 0.0 to 1.0 across the point horizontally from left to right. `gl_PointCoord.t` varies from 0.0 to 1.0 vertically from top to bottom.

## Version Support

| OpenGL ES Shading Language Version
--- | ---
Variable Name | 1.00 | 3.00 | 3.10
gl_PointCoord | ✔ | ✔ | ✔

## See Also

gl_FragCoord, gl_FragDepth

## Copyright

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

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