gl_PatchVerticesIn.3G man page

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 Name1.101.201.301.401.503.304.004.104.204.304.404.50
gl_PatchVerticesIn------

See Also

gl_TessLevelOuter(), gl_TessLevelInner(), gl_TessCoord()

Info

12/28/2016 [FIXME: source] [FIXME: manual]