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Sample a varying at the centroid of a pixel.


float interpolateAtCentroid( float interpolant );
vec2 interpolateAtCentroid( vec2 interpolant );
vec3 interpolateAtCentroid( vec3 interpolant );
vec4 interpolateAtCentroid( vec4 interpolant );


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


 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 thecentroidqualifier.

Version Support[edit]

interpolateAtCentroid 4.0+

See Also[edit]

 interpolateAtSample , interpolateAtOffset 


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.