gl_TessCoord — contains the coordinate of the vertex within the current patch
in vec3 gl_TessCoord ; Available only in the tessellation cevaluation language, gl_TessCoord specifies the three component (u, v, w) vector identifying the position of the vertex being processed by the shader relative to the primitive being tessellated.
| OpenGL Shading Language Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function 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_TessCoord | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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