glGetMapfv man page on Solaris

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GLGETMAP(3gl)							 GLGETMAP(3gl)

NAME
       glGetMapdv, glGetMapfv, glGetMapiv - return evaluator parameters

C SPECIFICATION
       void glGetMapdv( GLenum target,
			GLenum query,
			GLdouble *v )
       void glGetMapfv( GLenum target,
			GLenum query,
			GLfloat *v )
       void glGetMapiv( GLenum target,
			GLenum query,
			GLint *v )

PARAMETERS
       target  Specifies  the  symbolic	 name  of  a map.  Accepted values are
	       GL_MAP1_COLOR_4,	 GL_MAP1_INDEX,	 GL_MAP1_NORMAL,  GL_MAP1_TEX‐
	       TURE_COORD_1, GL_MAP1_TEXTURE_COORD_2, GL_MAP1_TEXTURE_COORD_3,
	       GL_MAP1_TEXTURE_COORD_4,	 GL_MAP1_VERTEX_3,   GL_MAP1_VERTEX_4,
	       GL_MAP2_COLOR_4,	 GL_MAP2_INDEX,	 GL_MAP2_NORMAL,  GL_MAP2_TEX‐
	       TURE_COORD_1, GL_MAP2_TEXTURE_COORD_2, GL_MAP2_TEXTURE_COORD_3,
	       GL_MAP2_TEXTURE_COORD_4,	  GL_MAP2_VERTEX_3,  and  GL_MAP2_VER‐
	       TEX_4.

       query   Specifies which parameter to return.  Symbolic names  GL_COEFF,
	       GL_ORDER, and GL_DOMAIN are accepted.

       v       Returns the requested data.

DESCRIPTION
       glMap1 and glMap2 define evaluators.  glGetMap returns evaluator param‐
       eters.  target chooses a map, query selects a specific parameter, and v
       points to storage where the values will be returned.

       The  acceptable	values	for  the target parameter are described in the
       glMap1 and glMap2 reference pages.

       query can assume the following values:

       GL_COEFF	      v returns the control points for the evaluator function.
		      One-dimensional  evaluators return order control points,
		      and two-dimensional evaluators return uorder×vorder con‐
		      trol  points.   Each control point consists of one, two,
		      three, or four integer, single-precision floating-point,
		      or  double-precision floating-point values, depending on
		      the type of the evaluator.  The  GL  returns  two-dimen‐
		      sional  control  points in row-major order, incrementing
		      the uorder index quickly and the vorder index after each
		      row.   Integer  values,  when requested, are computed by
		      rounding the internal floating-point values to the near‐
		      est integer values.

       GL_ORDER	      v	 returns  the  order  of the evaluator function.  One-
		      dimensional evaluators return a single value, order. The
		      initial  value  is 1.  Two-dimensional evaluators return
		      two values, uorder and vorder. The initial value is 1,1.

       GL_DOMAIN      v returns the linear u and v mapping  parameters.	  One-
		      dimensional  evaluators return two values, u1 and u2, as
		      specified by glMap1.  Two-dimensional evaluators	return
		      four values (u1, u2, v1, and v2) as specified by glMap2.
		      Integer values, when requested, are computed by rounding
		      the  internal floating-point values to the nearest inte‐
		      ger values.

NOTES
       If an error is generated, no change is made to the contents of v.

ERRORS
       GL_INVALID_ENUM is generated if	either	target	or  query  is  not  an
       accepted value.

       GL_INVALID_OPERATION  is	 generated if glGetMap is executed between the
       execution of glBegin and the corresponding execution of glEnd.

SEE ALSO
       glEvalCoord, glMap1, glMap2

				   15 Mar 97			 GLGETMAP(3gl)
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