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_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 uorder * vorder
                      control 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-dimensional  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 nearest 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)