Other Documentation

Wwise SDK 2022.1.8

◆ SetRTPCValue() [2/2]

AKSOUNDENGINE_API AKRESULT AK::SoundEngine::SetRTPCValue ( const char *  in_pszRtpcName,
AkRtpcValue  in_value,
AkGameObjectID  in_gameObjectID = AK_INVALID_GAME_OBJECT,
AkTimeMs  in_uValueChangeDuration = 0,
AkCurveInterpolation  in_eFadeCurve = AkCurveInterpolation_Linear,
bool  in_bBypassInternalValueInterpolation = false 

Sets the value of a real-time parameter control. With this function, you may set a game parameter value with global scope or with game object scope. Game object scope supersedes global scope. (Once a value is set for the game object scope, it will not be affected by changes to the global scope value.) Game parameter values set with global scope are applied to all game objects that not yet registered, or already registered but not overridden with a value with game object scope. To set a game parameter value with global scope, pass AK_INVALID_GAME_OBJECT as the game object. With this function, you may also change the value of a game parameter over time. To do so, specify a non-zero value for in_uValueChangeDuration. At each audio frame, the game parameter value will be updated internally according to the interpolation curve. If you call SetRTPCValue() with in_uValueChangeDuration = 0 in the middle of an interpolation, the interpolation stops and the new value is set directly. Thus, if you call this function at every game frame, you should not use in_uValueChangeDuration, as it would have no effect and it is less efficient. Refer to RTPCs and Game Objects, RTPCs and Busses and RTPCs and Plug-Ins for more details on RTPC scope.

  • AK_Success if the value was successfully set
  • AK_InvalidFloatValue if the value specified was NaN, Inf or FLT_MAX (3.402823e+38)
  • AK_InvalidID if in_pszRtpcName is NULL.
    Note: Strings are case-insensitive.
See also
in_pszRtpcName Name of the game parameter
in_value Value to set
in_gameObjectID Associated game object ID
in_uValueChangeDuration Duration during which the game parameter is interpolated towards in_value
in_eFadeCurve Curve type to be used for the game parameter interpolation
in_bBypassInternalValueInterpolation True if you want to bypass the internal "slew rate" or "over time filtering" specified by the sound designer. This is meant to be used when for example loading a level and you dont want the values to interpolate.

Was this page helpful?

Need Support?

Questions? Problems? Need more info? Contact us, and we can help!

Visit our Support page

Tell us about your project. We're here to help.

Register your project and we'll help you get started with no strings attached!

Get started with Wwise