%mathent; ]> 2011-2014 Khronos Group gl_PointCoord 3G gl_PointCoord contains the coordinate of a fragment within a point in mediump vec2 gl_PointCoord 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. gl_PointCoord gl_FragCoord, gl_FragDepth 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/.