GL_INSTANCEID(3G)               [FIXME: manual]              GL_INSTANCEID(3G)

NAME
       gl_InstanceID - contains the index of the current primitive in an
       instanced draw command

DECLARATION
       in int gl_InstanceID ;.SH "DESCRIPTION"

       gl_InstanceID is a vertex language input variable that holds the
       integer index of the current primitive in an instanced draw command
       such as glDrawArraysInstanced. If the current primitive does not
       originate from an instanced draw command, the value of gl_InstanceID is
       zero.

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_InstanceID |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO
       gl_VertexID()

COPYRIGHT
       Copyright (C) 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 (C) 2011-2014 Khronos Group

[FIXME: source]                   05/21/2022                 GL_INSTANCEID(3G)