gl_TessLevelOuter — contains the outer tessellation levels for the current patch
patch out float gl_TessLevelOuter[4];
(tessellation control language)patch in float gl_TessLevelInner[4];
(tessellation evaluation languge)
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.
Variable | Version 1.10 | Version 1.20 | Version 1.30 | Version 1.40 | Version 1.50 | Version 3.30 | Version 4.00 | Version 4.10 |
---|---|---|---|---|---|---|---|---|
gl_TessLevelOuter | - | - | - | - | - | - | Y | Y |
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