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cgSetParameterVariability
Langue: en
Version: 47151 (openSuse - 09/10/07)
Section: 3 (Bibliothèques de fonctions)
NAME
cgSetParameterVariability - set a parameter's variabilitySYNOPSIS
#include <Cg/cg.h>
void cgSetParameterVariability( CGparameter param, CGenum vary );
PARAMETERS
- param
- The parameter.
- vary
- The variability to which param will be set.
RETURN VALUES
None.DESCRIPTION
cgSetParameterVariability allows the application to change the variability of a parameter.Currently parameters may not be changed to or from CG_VARYING variability. However parameters of CG_UNIFORM and CG_LITERAL variability may be changed.
Valid values for vary include :
- 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 will often make a program more efficient at the expense of requiring a compile every time the value is set.
- CG_DEFAULT
- By default, the variability of a parameter will be overridden by the a source parameter connected to it unless it is changed with cgSetParameterVariability. If it is set to CG_DEFAULT it will restore the default state of assuming the source parameters variability.
EXAMPLES
to-be-writtenERRORS
CG_INVALID_PARAM_HANDLE_ERROR is generated if param is not a valid parameter.CG_INVALID_ENUMERANT_ERROR is generated if vary is not CG_UNIFORM, CG_LITERAL, or CG_DEFAULT.
CG_INVALID_PARAMETER_VARIABILITY_ERROR is generated if the parameter could not be changed to the variability indicated by vary.
CG_INVALID_PARAMETER_TYPE_ERROR is generated if vary is CG_LITERAL and param is a not a numeric parameter.
HISTORY
cgSetParameterVariability was introduced in Cg 1.2.SEE ALSO
the cgGetParameterVariability manpageContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre