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gl_PatchVerticesIn

Name

gl_PatchVerticesIn — contains the number of vertices in the current patch

Declaration

in int gl_PatchVerticesIn ;

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 - - - - - -
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