NAME¶
gl_InvocationID - contains the invocation index of the current shader
DECLARATION¶
in int gl_InvocationID ;.SH "DESCRIPTION"
In the tessellation control language,
gl_InvocationID contains the index
of the output patch vertex assigned to the shader invocation. It is assigned
an integer value in the range [0, N-1] where N is the number of output patch
vertices.
In the geometry language,
gl_InvocationID identifies the invocation
number assigned to the geometry shader invocation. It is assigned an integer
value in the range [0, N-1] where N is the number of geometry shader
invocations per primitive.
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_InvocationID |
- |
- |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
[1] Versions 1.50 to 3.30 - geometry shaders only.
SEE ALSO¶
gl_InstanceID()
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