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GLPATCHPARAMETER(3G)		 OpenGL Manual		  GLPATCHPARAMETER(3G)

NAME
       glPatchParameter - specifies the parameters for patch primitives

C SPECIFICATION
       void glPatchParameteri(GLenum pname, GLint value);

       void glPatchParameterfv(GLenum pname, const GLfloat *values);

PARAMETERS
       pname
	   Specifies the name of the parameter to set. The symbolc constants
	   GL_PATCH_VERTICES, GL_PATCH_DEFAULT_OUTER_LEVEL, and
	   GL_PATCH_DEFAULT_INNER_LEVEL are 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.

DESCRIPTION
       glPatchParameter specifies the parameters that will be used for patch
       primitives.  pname specifies the parameter to modify and must be either
       GL_PATCH_VERTICES, GL_PATCH_DEFAULT_OUTER_LEVEL or
       GL_PATCH_DEFAULT_INNER_LEVEL. For glPatchParameteri, value specifies
       the new value for the parameter specified by pname. For
       glPatchParameterfv, values specifies the address of an array containing
       the new values 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.

       When pname is GL_PATCH_DEFAULT_OUTER_LEVEL or
       GL_PATCH_DEFAULT_INNER_LEVEL, values contains the address of an array
       contiaining the default outer or inner tessellation levels,
       respectively, to be used when no tessellation control shader is
       present.

ERRORS
       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.

SEE ALSO
       glDrawArrays(), glDrawArraysInstanced(), glDrawElements(),
       glDrawRangeElements(),

COPYRIGHT
       Copyright © 2010 Khronos Group. This material may be distributed
       subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

AUTHORS
       opengl.org

opengl.org			  03/16/2013		  GLPATCHPARAMETER(3G)

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