NAME
    cgGetParameterVariability - get a parameter's variability

SYNOPSIS
      #include <Cg/cg.h>

      CGenum cgGetParameterVariability( CGparameter param );

PARAMETERS
    param   Specifies the program parameter.

DESCRIPTION
    cgGetParameterVariability allows the application to retrieve the
    variablilty of a parameter in a Cg program. This variability is
    necessary for the application to be able to supply the program's inputs
    and use the program's outputs.

    cgGetParameterVariability will return one of the following
    variabilities:

    CG_VARYING
        A varying parameter is one whose value changes with each invocation
        of the program.

    CG_UNIFORM
        A uniform parameter is one whose value does not change with each
        invocation of a program, but whose value can change between groups
        of program invocations.

    CG_LITERAL
        A literal parameter is folded out at compile time. Making a uniform
        parameter literal with cgSetParameterVariability will often make a
        program more efficient at the expense of requiring a compile every
        time the value is set.

    CG_CONSTANT
        A constant parameter is never changed by the user. It's generated by
        the compiler by certain profiles that require immediate values to be
        placed in certain resource locations.

    CG_MIXED
        A structure parameter that contains parameters that differ in
        variability.

RETURN VALUES
    Returns the variability of param. Returns CG_ERROR if an error occurs.

ERRORS
    CG_INVALID_PARAM_HANDLE_ERROR is generated if the handle param is
    invalid.

SEE ALSO
    cgGetNamedParameter, cgGetNextParameter, cgGetParameterName,
    cgGetParameterType, cgGetParameterDirection, cgGetParameterBinding,
    cgGetParameterDirectionalBinding, cgIsArray, cgSetParameterVariablity,
    cgSetParameterDirection, cgSetParameterBinding,
    cgSetParameterDirectionalBinding

