void GLAPIENTRY glMapGrid1d( GLint un,
                                    GLdouble u1,
                                    GLdouble u2 )
       void GLAPIENTRY glMapGrid1f( GLint un,
                                    GLfloat u1,
                                    GLfloat u2 )
       void GLAPIENTRY glMapGrid2d( GLint un,
                                    GLdouble u1,
                                    GLdouble u )
       void GLAPIENTRY glMapGrid2f( GLint un,
                                    GLfloat u1,
                                    GLfloat u )

PARAMETERS
       un  Specifies the number of partitions in the grid range  interval  [u1,
           u].  Must be positive.

       u1, u
           Specify the mappings for integer grid domain values i=0 and i=un.

       _param4
           Specifies  the  number  of  partitions  in  the  grid range interval
           [_param5, _param6]
           (glMapGrid2 only).

       _param5, _param6
           Specify the mappings for integer grid domain values j=0 and  j=_eqn‐
           param4
           (glMapGrid2 only).

DESCRIPTION
       glMapGrid  and  glEvalMesh are used together to efficiently generate and
       evaluate a series of evenly-spaced map domain values.  glEvalMesh  steps
       through  the  integer  domain  of  a one- or two-dimensional grid, whose
       range is the domain of the  evaluation  maps  specified  by  glMap1  and
       glMap2.

       glMapGrid1 and glMapGrid2 specify the linear grid mappings between the i
       (or i and j) integer grid coordinates, to the u (or u and  v)  floating-
       point  evaluation map coordinates.  See glMap1 and glMap2 for details of
       how u and v coordinates are evaluated.

       glMapGrid1 specifies a single linear mapping such that integer grid  co‐
       ordinate  0  maps exactly to u1, and integer grid coordinate un maps ex‐
       actly to u.  All other integer grid coordinates i are mapped so that

                                   u=i(u−u1)/un+u1

       glMapGrid2 specifies two such linear mappings.  One  maps  integer  grid
       coordinate  i=0  exactly to u1, and integer grid coordinate i=un exactly
       to u.  The other maps integer grid coordinate j=0  exactly  to  _param5,
       and  integer grid coordinate j=_eqnparam4 exactly to _param6.  Other in‐

ASSOCIATED GETS
       glGet with argument GL_MAP1_GRID_DOMAIN
       glGet with argument GL_MAP2_GRID_DOMAIN
       glGet with argument GL_MAP1_GRID_SEGMENTS
       glGet with argument GL_MAP2_GRID_SEGMENTS

SEE ALSO
       glEvalCoord, glEvalMesh, glEvalPoint, glMap1, glMap2

                                                                  GLMAPGRID(3G)