GLenum mode )

PARAMETERS
       target  Specifies a symbolic constant indicating the behavior to be con‐
               trolled.      GL_FOG_HINT,                  GL_LINE_SMOOTH_HINT,
               GL_PERSPECTIVE_CORRECTION_HINT,     GL_POINT_SMOOTH_HINT,    and
               GL_POLYGON_SMOOTH_HINT are accepted.

       mode    Specifies a symbolic constant indicating the  desired  behavior.
               GL_FASTEST, GL_NICEST, and GL_DONT_CARE are accepted.

DESCRIPTION
       Certain  aspects  of GL behavior, when there is room for interpretation,
       can be controlled with hints.  A hint is specified with  two  arguments.
       target  is a symbolic constant indicating the behavior to be controlled,
       and mode is another symbolic constant indicating the  desired  behavior.
       The  initial  value for each target is GL_DONT_CARE.  mode can be one of
       the following:

       GL_FASTEST          The most efficient option should be chosen.

       GL_NICEST           The most correct, or highest quality, option  should
                           be chosen.

       GL_DONT_CARE        No preference.

       Though  the  implementation aspects that can be hinted are well defined,
       the interpretation of the hints depends on the implementation.  The hint
       aspects  that  can be specified with target, along with suggested seman‐
       tics, are as follows:

       GL_FOG_HINT         Indicates the accuracy of fog calculation.  If  per-
                           pixel  fog  calculation is not efficiently supported
                           by the GL implementation,  hinting  GL_DONT_CARE  or
                           GL_FASTEST  can  result in per-vertex calculation of
                           fog effects.

       GL_LINE_SMOOTH_HINT Indicates the sampling quality of antialiased lines.
                           If  a  larger  filter  function  is applied, hinting
                           GL_NICEST can result in more pixel  fragments  being
                           generated during rasterization,

       GL_PERSPECTIVE_CORRECTION_HINT
                           Indicates  the  quality of color and texture coordi‐
                           nate interpolation.  If perspective-corrected param‐
                           eter  interpolation  is not efficiently supported by
                           the  GL  implementation,  hinting  GL_DONT_CARE   or
                           GL_FASTEST can result in simple linear interpolation
                           of colors and/or texture coordinates.

       GL_POINT_SMOOTH_HINT
                           Indicates  the  sampling  quality   of   antialiased

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

       GL_INVALID_OPERATION is generated if glHint is executed between the exe‐
       cution of glBegin and the corresponding execution of glEnd.

                                                                     GLHINT(3G)