NAME¶
gl_SamplePosition - contains the location of the current sample within the
current fragment
DECLARATION¶
in vec2 gl_SamplePosition ;.SH "DESCRIPTION"
gl_SamplePosition is a fragment language input variable that contains the
location within a fragment of the sample currently being processed. The x and
y components of
gl_SamplePosition contain the sub-pixel coordinate of
the current sample and will have values in the range 0.0 to 1.0. The sub-pixel
coordinates of the center of the pixel are always (0.5, 0.5). Any static use
of
gl_SamplePosition causes the entire fragment shader to be evaluated
per-sample rather than per-fragment. When rendering to a non-multisample
buffer, or if multisample rasterization is disabled,
gl_SamplePosition
will be (0.5, 0.5).
VERSION SUPPORT¶
|
OpenGL Shading Language Version |
|
|
|
|
|
|
|
|
|
|
|
| Function 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_SamplePosition |
- |
- |
- |
- |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
SEE ALSO¶
gl_SampleID(),
gl_SampleMask(),
gl_FragCoord()
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
