NAME
    cgGetParameterDirection - get a program parameter's direction

SYNOPSIS
      #include <Cg/cg.h>

      CGenum cgGetParameterDirection( CGparameter param );

PARAMETERS
    param   The program parameter.

RETURN VALUES
    Returns the direction of param.

    Returns CG_ERROR if an error occurs.

DESCRIPTION
    cgGetParameterDirection allows the application to distinguish program
    input parameters from program output parameters. This information is
    necessary for the application to properly supply the program inputs and
    use the program outputs.

    cgGetParameterDirection will return one of the following enumerants :

    CG_IN       Specifies an input parameter.

    CG_OUT      Specifies an output parameter.

    CG_INOUT    Specifies a parameter that is both input and output.

    CG_ERROR    If an error occurs.

EXAMPLES
    *to-be-written*

ERRORS
    CG_INVALID_PARAM_HANDLE_ERROR is generated if param is not a valid
    parameter.

HISTORY
    cgGetParameterDirection was introduced in Cg 1.1.

SEE ALSO
    the cgGetNamedParameter manpage, the cgGetNextParameter manpage, the
    cgGetParameterName manpage, the cgGetParameterType manpage, the
    cgGetParameterVariability manpage, the cgIsArray manpage, the
    cgSetParameterVariability manpage

