glPatchParameteri — specifies the parameters for patch primitives
void glPatchParameteri( | GLenum pname, |
GLint value); |
pname Specifies the name of the parameter to set. The symbolc constants GL_PATCH_VERTICES is accepted.
value Specifies the new value for the parameter given by pname.
values Specifies the address of an array containing the new values for the parameter given by pname.
glPatchParameteri specifies the parameters that will be used for patch primitives. pname specifies the parameter to modify and must be GL_PATCH_VERTICES. value specifies the new value for the parameter specified by pname.
When pname is GL_PATCH_VERTICES, value specifies the number of vertices that will be used to make up a single patch primitive. Patch primitives are consumed by the tessellation control shader (if present) and subsequently used for tessellation. When primitives are specified using glDrawArrays or a similar function, each patch will be made from parameter control points, each represented by a vertex taken from the enabeld vertex arrays. parameter must be greater than zero, and less than or equal to the value of GL_MAX_PATCH_VERTICES.
GL_INVALID_ENUM is generated if pname is not an accepted value.
GL_INVALID_VALUE is generated if pname is GL_PATCH_VERTICES and value is less than or equal to zero, or greater than the value of GL_MAX_PATCH_VERTICES.
| OpenGL ES API Version | ||||
|---|---|---|---|---|
| Function Name | 2.0 | 3.0 | 3.1 | 3.2 |
glPatchParameteri | - | - | - | ✔ |
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