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 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_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
