gl_PrimitiveIDIn - contains the index of the current primitive
in int gl_PrimitiveIDIn ;.SH "DESCRIPTION"
gl_PrimitiveIDIn is a geometry language input variable that
holds the number of primitives processed by the shader since the current set
of rendering primitives was started. The first primitive processed by the
drawing command is numbered zero and the primitive ID counter is incremented
after every individual point, line or triangle primitive is processed. For
triangles drawn in point or line mode, the primitive ID counter is
incremented only once, even through multiple points or lines may actually be
drawn. Restarting a primitive topology using the primitive restart index has
no effect on the primitive ID counter.
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 © 2011-2014 Khronos Group
|OpenGL Shading Language