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Contains the index of the current vertex.



gl_VertexIDis a vertex language input variable that holds an integer index for the vertex. The index is implicitly generated byglDrawArraysand other commands that do not reference the content of the GL_ELEMENT_ARRAY_BUFFER , or explicitly generated from the content of the GL_ELEMENT_ARRAY_BUFFER by commands such as glDrawElements . For glDrawElements forms that take a basevertex ,gl_VertexIDwill have this value added to the index from the buffer.

Version Support[edit]

gl_VertexID 1.3+

See Also[edit]



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.