C SPECIFICATION

       void GLAPIENTRY glGetMapdv( GLenum target,
                                   GLenum query,
                                   GLdouble *v )
       void GLAPIENTRY glGetMapfv( GLenum target,
                                   GLenum query,
                                   GLfloat *v )
       void GLAPIENTRY 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_TEXTURE_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_TEXTURE_COORD_1,
               GL_MAP2_TEXTURE_COORD_2,               GL_MAP2_TEXTURE_COORD_3,
               GL_MAP2_TEXTURE_COORD_4,         GL_MAP2_VERTEX_3,          and
               GL_MAP2_VERTEX_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 uorderxvorder 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.

       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



                                                                  GLGETMAP(3G)