NAME

       interpolateAtCentroid - sample a varying at the centroid of a pixel

DECLARATION

       float interpolateAtCentroid(float interpolant);

       vec2 interpolateAtCentroid(vec2 interpolant);

       vec3 interpolateAtCentroid(vec3 interpolant);

       vec4 interpolateAtCentroid(vec4 interpolant);

PARAMETERS

       interpolant
           Specifies the interpolant to be sampled at the pixel centroid.

DESCRIPTION

       interpolateAtCentroid returns the value of the input varying interpolant sampled at a location inside
       both the pixel and the primitive being processed. The value obtained would be the value assigned to the
       input variable if declared with the centroid qualifier.

VERSION SUPPORT

       ┌───────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                       │        OpenGL Shading Language Version                                            │
       ├───────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ Function              │ 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                  │      │      │      │      │      │      │      │      │      │      │      │      │
       ├───────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ interpolateAtCentroid │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └───────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       interpolateAtSample(), interpolateAtOffset()

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]                                    01/03/2018                           INTERPOLATEATCENTROI(3G)