GL_PATCHVERTICESIN(3G) [FIXME: manual] GL_PATCHVERTICESIN(3G)

gl_PatchVerticesIn - contains the number of vertices in the current patch

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.

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 - - - - - -

gl_TessLevelOuter(), gl_TessLevelInner(), gl_TessCoord()

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Copyright © 2011-2014 Khronos Group
05/17/2020 [FIXME: source]