NAME

       gl_TessLevelOuter - contains the outer tessellation levels for the current patch

DECLARATION

       // In tessellation control shaders

       out float gl_TessLevelOuter[4] ;

       // In tessellation evaluation shaders

       in float gl_TessLevelOuter[4] ;

DESCRIPTION

       Available only in the tessellation control and evaluation languages, gl_TessLevelOuter is
       used to assign values to the corresponding outer tesellation levels of the current patch.
       The values written into gl_TessLevelOuter by the tessellation control shader are used by
       the tessellation primitive generator to control primitive tessellation and may be read by
       the subsequent tessellation evaluation shader.

       As inputs to the tessellation evaluation shader, gl_TessLevelOuter contains the values
       written by the tessellation control shader, if present. If no tessellation control shader
       is present, it contains the default tessellation level.

VERSION SUPPORT

       ┌──────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                  │        OpenGL Shading Language Version                                            │
       ├──────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │Function          │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │Name              │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │gl_TessLevelOuter │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └──────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       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

[FIXME: source]                             07/22/2015                      GL_TESSLEVELOUTER(3G)