NAME¶
gl_PrimitiveIDIn - contains the index of the current primitive
DECLARATION¶
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.
VERSION SUPPORT¶
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OpenGL Shading Language Version |
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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_PrimitiveIDIn |
- |
- |
- |
- |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
SEE ALSO¶
gl_InstanceID()
COPYRIGHT¶
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¶
Copyright © 2011-2014 Khronos Group