Changing parameters from a different script

Unity
1

Greetings,
I’m trying to write a code to change the value of a parameter, based on an in-game event.

I already have a Studio Event Emitter script on my FPSController (Unity’s default controller) and I’m trying to create a script on my enemy to trigger different music when it detects the player:

[FMODUnity.EventRef]
private string eventPath = "event:/Music/Music";
private FMOD.Studio.EventInstance studioInstance;

void Update()
{
    studioInstance = FMODUnity.RuntimeManager.CreateInstance(eventPath);

    if(playerDetected)
    {
        SetParameter(studioInstance, "Enemy", 1.0f);
    }
}

// Set an FMOD parameter 
void SetParameter(FMOD.Studio.EventInstance e, string name, float value)
{
    FMOD.Studio.ParameterInstance parameter;

    e.getParameter(name, out parameter);
    parameter.setValue(value);
}

The code above doesn’t change the parameter on the FPSController.
I’m using FMOD 1.1, will appreciate any help,
Thanks!

2

You can’t get the Studio Event Emitter from the FPSController by creating a new Event Instance in another script. In simple terms, it’s like creating a new copy of the instance (that is not playing) with its own parameter instance. You should try to get a reference to the Studio Event Emitter already playing. Try something like this:

[SerializeField]
private FMODUnity.StudioEventEmitter emitter;

void Update()
{
    if (playerDetected)
    {
        SetParameter(emitter.EventInstance, "Enemy", 1.0f);
    }
}

void SetParameter(FMOD.Studio.EventInstance e, string name, float value)
{
    FMOD.Studio.ParameterInstance parameter;
    e.getParameter(name, out parameter);
    parameter.setValue(value);
}

Drag the GameObject with the FPSController/Studio Event Emitter to the empty Studio Event Emitter field in your Enemy’s inspector tab. By doing this, you get a reference to that specific Event Emitter. If you notice, we pass the Event Instance of the emitter to the SetParameter method : )

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3

Thank you so much! You have no idea how much I appreciate your help - works like a charm!

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