NAME
    cgIsEffect - determine if an effect handle references a valid effect

SYNOPSIS
      #include <Cg/cg.h>

      CGbool cgIsEffect( CGeffect effect );

PARAMETERS
    effect  The effect handle to check.

RETURN VALUES
    Returns CG_TRUE if effect references a valid effect.

    Returns CG_FALSE otherwise.

DESCRIPTION
    cgIsEffect returns CG_TRUE if effect references a valid effect, CG_FALSE
    otherwise.

EXAMPLES
    *to-be-written*

ERRORS
    None.

HISTORY
    cgIsEffect was introduced in Cg 1.4.

SEE ALSO
    the cgCreateEffect manpage, the cgCreateEffectFromFile manpage

