> # 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

> cgCreateEffect, cgCreateEffectFromFile