GL_PATCHVERTICESIN(3G)

NAME
gl_PatchVerticesIn - contains the number of vertices in the current patch

DECLARATION
in int gl_PatchVerticesIn ;.SH "DESCRIPTION"

Available only in the tessellation control and evaluation languages, gl_PatchVerticesIn contains the number of vertices in the input being processed by the shader. A single tessellation control or evaluation shader can read patches of differing sizes, and so th value of gl_PatchVertexIn may differ between patches.

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_PatchVerticesIn | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

SEE ALSO

gl_TessLevelOuter(), gl_TessLevelInner(), gl_TessCoord()

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