gl_InstanceID - OpenGL ES 3.2 Reference Pages

## Name

gl_InstanceID — contains the instance number of the current primitive in an instanced draw command

## Declaration

`in highp int gl_InstanceID ;`

## Description

`gl_InstanceID` is a vertex language input variable that holds the integer instance number 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 ES Shading Language Version
--- | ---
Variable Name | 1.00 | 3.00 | 3.10 | 3.20
gl_InstanceID | - | ✔ | ✔ | ✔

## See Also

gl_VertexID

## Copyright

Copyright © 2011-2015 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/.