gl_PointCoord - contains the coordinate of a fragment within a point

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.

OpenGL Shading Language Version
Variable Name 1.10 1.20 1.30 1.40 1.50 3.30 4.00 4.10 4.20 4.30 4.40 4.50

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.

Copyright © 2011-2014 Khronos Group
05/17/2020 [FIXME: source]