void GLAPIENTRY glEvalPoint1( GLint i )
       void GLAPIENTRY glEvalPoint2( GLint i,
                                     GLint j )

PARAMETERS
       i  Specifies the integer value for grid domain variable i.

       j  Specifies the integer value for grid domain variable j  (glEvalPoint2
          only).

DESCRIPTION
       glMapGrid  and glEvalMesh are used in tandem to efficiently generate and
       evaluate a series of evenly spaced map domain values.   glEvalPoint  can
       be  used  to  evaluate a single grid point in the same gridspace that is
       traversed by glEvalMesh.  Calling glEvalPoint1 is equivalent to calling

              glEvalCoord1( i⋅Δu+u1 );
       where

              Δu=(u2−u1)/n

       and n, u1, and u2 are the arguments to the most recent  glMapGrid1  com‐
       mand.   The  one  absolute  numeric requirement is that if i=n, then the
       value computed from i⋅Δu+u1 is exactly u2.

       In the two-dimensional case, glEvalPoint2, let

              Δu=(u2−u1)/n

              Δv=(v2−v1)/m,

       where n, u1, u2, m, v1, and v2 are the  arguments  to  the  most  recent
       glMapGrid2  command.   Then  the  glEvalPoint2  command is equivalent to
       calling

              glEvalCoord2( i⋅Δu+u1, j⋅Δv+v1 );
       The only absolute numeric requirements are that if i=n, then  the  value
       computed from i⋅Δu+u1 is exactly u2, and if j=m, then the value computed
       from i⋅Δv+v1 is exactly v2.

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, glMap1, glMap2, glMapGrid

                                                                GLEVALPOINT(3G)