GL_INVOCATIONID - Online Linux Manual Page

Section : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEgl_InvocationID − contains the invocation index of the current shader
DECLARATIONin ​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 ALSOgl_InstanceID()
COPYRIGHTCopyright © 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/​.
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