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NAME
       gl_PointCoord - contains the coordinate of a fragment within a point


DECLARATION
       in vec2 gl_PointCoord ;.SH "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.
       If GL_POINT_SPRITE_COORD_ORIGIN is GL_LOWER_LEFT, gl_PointCoord.t varies from 0.0 to 1.0
       vertically from bottom to top. Otherwise, if GL_POINT_SPRITE_COORD_ORIGIN is GL_UPPER_LEFT
       then gl_PointCoord.t varies from 0.0 to 1.0 vertically from top to bottom. The default
       value of GL_POINT_SPRITE_COORD_ORIGIN is GL_UPPER_LEFT.


VERSION SUPPORT
       ┌──────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │              │        OpenGL Shading Language Version                                            │
       ├──────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │Variable      │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │Name          │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │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.
       http://opencontent.org/openpub/.


COPYRIGHT
       Copyright © 2011-2014 Khronos Group

[FIXME: source]                             07/22/2015                          GL_POINTCOORD(3G)