Volume and rolloff - can you ignore the Z axis?

Questions & Answers
1

hello!

I am wondering if there is a way to ignore the Z axis when unity is computing audio roll-off?

We are creating a top down zelda type game that has a script to move objects in front of/ behind the player, and this is sometimes causing unwanted rolloff, even when the player appears to be right beside the object.

Muchos Gracias!

2

No, the roll-off process is completely internal and you can’t influence how it works.

You could compute the distance manually and apply your own roll-off formular to the volume.

edit
Something like that:

//C#
public float maxDistance = 10.0f;

Transform listener;
Transform myTransform;
AudioSource source;
float initialVolume;

void Start()
{
    AudioListener tmp = (AudioListener)FindObjectOfType(typeof(AudioListener));
    listener = tmp.transform;
    source = audio;
    myTransform = transform;
    initialVolume = source.volume;
}

void Update()
{
    Vector3 distVec = myTransform.position - listener.position;
    distVec.z = 0; // ignore the z axis
    float dist = distVec.magnitude;
    
    // linear
    float falloff = Mathf.Clamp01(1.0f - (dist / maxDistance));
    
    source.volume = initialVolume * falloff;
}

Keep in mind that the listener have to exist when the script’s start is executed. If you instantiate your player at a later point in time, you have to trigger this initialization manually.