Optimize audio occlusion with the WwiseAmbientOcclusion script for Unity. This script checks if player has entered specific zones and applies occlusion appropriately to dynamic change audio playback.

WwiseAmbientOcclusion.cs

using UnityEngine;

//Uses Logger.cs, there's a commented version using the Unity Debugger wrapped in a region below

public class WwiseAmbientOcclusion : MonoBehaviour
{
#if UNITY_EDITOR
    public bool DebugScript = false;
#endif
    public GameObject AudioListener;
    public GameObject[] WwiseReverbZones;
    public AK.Wwise.RTPC[] OcclusionsRTPC;
    public float LowPass_Max = 1;
    public float Volume_Max = 1;
    public string NameOfListener = "ListenerName";

    private AK.Wwise.RTPC setRTPCLoPass;
    private AK.Wwise.RTPC setRTPCVolume;
    private Collider[] reverbZoneColliders;
    private bool lastOcclusionState = false;

    private void Awake()
    {
        if (!enabled)
        {
            Destroy(this);
            return;
        }

        SetupChecks();
        GetReverbZoneColliders();
    }

    void SetupChecks()
    {
        if (OcclusionsRTPC.Length == 2)
        {
            setRTPCLoPass = OcclusionsRTPC[0];
            setRTPCVolume = OcclusionsRTPC[1];
        }
        else if (OcclusionsRTPC.Length > 2)
        {
            Logger.LogWarning($"Remember to set additional RTPC's within the Perform/NoPerformOcclusion() functions of {this.name}");
            setRTPCLoPass = OcclusionsRTPC[0];
            setRTPCVolume = OcclusionsRTPC[1];
        }
        else if (OcclusionsRTPC.Length < 2)
        {
            Logger.LogWarning("Occlusion array not set, returning");
            enabled = false;
            return;
        }
        else if (WwiseReverbZones.Length == 0)
        {
            Logger.LogError("Error — Set the WwiseReverbZones array — bailing");
            enabled = false;
            return;
        }
    }

    void GetReverbZoneColliders()
    {
        reverbZoneColliders = new Collider[WwiseReverbZones.Length];

        for (int i = 0; i < WwiseReverbZones.Length; i++)
        {
            GameObject reverbZone = WwiseReverbZones[i];
            if (reverbZone != null)
            {
                reverbZoneColliders[i] = reverbZone.GetComponent<Collider>();
            }
        }
    }

    private void Start()
    {
        if (AudioListener == null || reverbZoneColliders.Length == 0)
        {
            if (DebugScript) Logger.Log("Returning WwiseAmbientOcclusion, check that AudioListener or Wwise Reverb Zones are properly assigned.");
            enabled = false;
            return;
        }

        AkSoundEngine.RegisterGameObj(gameObject);
    }

    private void Update()
    {
        bool currentOcclusionState = OcclusionCheck();

        if (currentOcclusionState != lastOcclusionState)
        {
            if (DebugScript) Logger.Log($"{this} occlusion state has changed, setting new state");
            switch (currentOcclusionState)
            {
                case true:
                    PerformOcclusion();
                    break;
                case false:
                    PerformNoOcclusion();
                    break;
            }

            lastOcclusionState = currentOcclusionState;
            if (DebugScript) Logger.Log($"LastOcclusionState set to {lastOcclusionState}");
        }
        else
        {
            if (DebugScript) Logger.Log($"{this} occlusion state hasn't changed, returning");
            return;
        }

    }

    bool OcclusionCheck()
    {
        bool isOccluded = false; // Track the occlusion state

        foreach (Collider zoneTriggerCollider in reverbZoneColliders)
        {
            if (zoneTriggerCollider != null && zoneTriggerCollider.bounds.Contains(AudioListener.transform.position))
            {
                isOccluded = true; // Update the occlusion state

                if (DebugScript) Logger.Log("player within occlusion zone");
                break; // No need to check the remaining colliders if occlusion is already detected
            }
        }

        return isOccluded;
        
    }

    void PerformOcclusion()
    {
        if (DebugScript)
            Logger.Log("Performing Occlusion");

        setRTPCLoPass.SetValue(gameObject, LowPass_Max);
        setRTPCVolume.SetValue(gameObject, Volume_Max);
    }

    void PerformNoOcclusion()
    {
        if (DebugScript)
            Logger.Log("No Occlusion Performing");

        setRTPCLoPass.SetValue(gameObject, 0);
        setRTPCVolume.SetValue(gameObject, 0);
    }

}

#region UnityDebugLogScript

//using UnityEngine;

//public class WwiseAmbientOcclusion : MonoBehaviour
//{
//#if UNITY_EDITOR
//    public bool DebugScript = false;
//#endif
//    [Header("Playback Settings")]
//    public GameObject AudioListener;
//    public GameObject[] WwiseReverbZones;
//    public AK.Wwise.RTPC[] OcclusionsRTPC;
//    public float LowPass_Max = 1;
//    public float Volume_Max = 1;
//    public string NameOfListener = "CameraBrain";

//    private AK.Wwise.RTPC setRTPCLoPass;
//    private AK.Wwise.RTPC setRTPCVolume;
//    private Collider[] reverbZoneColliders;
//    private bool lastOcclusionState = false;

//    private void Awake()
//    {
//        if (!enabled)
//        {
//            Destroy(this);
//            return;
//        }

//        SetupChecks();
//        GetReverbZoneColliders();
//    }

//    void SetupChecks()
//    {
//        if (OcclusionsRTPC.Length == 2)
//        {
//            setRTPCLoPass = OcclusionsRTPC[0];
//            setRTPCVolume = OcclusionsRTPC[1];
//        }
//        else if (OcclusionsRTPC.Length > 2)
//        {
//#if UNITY_EDITOR
//            Debug.LogWarning($"Remember to set additional RTPC's within the Perform/NoPerformOcclusion() functions of {this.name}");
//#endif
//            setRTPCLoPass = OcclusionsRTPC[0];
//            setRTPCVolume = OcclusionsRTPC[1];
//        }
//        else if (OcclusionsRTPC.Length < 2)
//        {
//#if UNITY_EDITOR
//            Debug.LogWarning("Occlusion array not set, returning");
//#endif
//            enabled = false;
//            return;
//        }
//        else if (WwiseReverbZones.Length == 0)
//        {
//#if UNITY_EDITOR
//            Debug.LogError("Error — Set the WwiseReverbZones array — bailing");
//#endif
//            enabled = false;
//            return;
//        }
//    }

//    void GetReverbZoneColliders()
//    {
//        reverbZoneColliders = new Collider[WwiseReverbZones.Length];

//        for (int i = 0; i < WwiseReverbZones.Length; i++)
//        {
//            GameObject reverbZone = WwiseReverbZones[i];
//            if (reverbZone != null)
//            {
//                reverbZoneColliders[i] = reverbZone.GetComponent<Collider>();
//            }
//        }
//    }

//    private void Start()
//    {
//        if (AudioListener == null || reverbZoneColliders.Length == 0)
//        {
//#if UNITY_EDITOR
//            if (DebugScript) Debug.Log("Returning WwiseAmbientOcclusion, check that AudioListener or Wwise Reverb Zones are properly assigned.");
//#endif
//            enabled = false;
//            return;
//        }

//        AkSoundEngine.RegisterGameObj(gameObject);
//    }

//    private void Update()
//    {
//        bool currentOcclusionState = OcclusionCheck();

//        if (currentOcclusionState != lastOcclusionState)
//        {
//#if UNITY_EDITOR
//            if (DebugScript) Debug.Log($"{this} occlusion state has changed, setting new state");
//#endif
//            switch (currentOcclusionState)
//            {
//                case true:
//                    PerformOcclusion();
//                    break;
//                case false:
//                    PerformNoOcclusion();
//                    break;
//            }

//            lastOcclusionState = currentOcclusionState;
//#if UNITY_EDITOR
//            if (DebugScript) Debug.Log($"LastOcclusionState set to {lastOcclusionState}");
//#endif
//        }
//        else
//        {
//#if UNITY_EDITOR
//            if (DebugScript) Debug.Log($"{this} occlusion state hasn't changed, returning");
//#endif
//            return;
//        }

//    }

//    bool OcclusionCheck()
//    {
//        bool isOccluded = false; // Track the occlusion state

//        foreach (Collider zoneTriggerCollider in reverbZoneColliders)
//        {
//            if (zoneTriggerCollider != null && zoneTriggerCollider.bounds.Contains(AudioListener.transform.position))
//            {
//                isOccluded = true; // Update the occlusion state

//                BypassPlugInEffectsRTPCs(isOccluded, zoneTriggerCollider.name);
//#if UNITY_EDITOR
//                if (DebugScript) Debug.Log("player within occlusion zone");
//#endif
//                break; // No need to check the remaining colliders if occlusion is already detected
//            }
//        }

//        return isOccluded;

//    }

//    void PerformOcclusion()
//    {
//#if UNITY_EDITOR
//        if (DebugScript) Debug.Log("Performing Occlusion");
//#endif

//        setRTPCLoPass.SetValue(gameObject, LowPass_Max);
//        setRTPCVolume.SetValue(gameObject, Volume_Max);
//    }

//    void PerformNoOcclusion()
//    {
//#if UNITY_EDITOR
//        if (DebugScript) Debug.Log("No Occlusion Performing");
//#endif

//        setRTPCLoPass.SetValue(gameObject, 0);
//        setRTPCVolume.SetValue(gameObject, 0);
//        AkSoundEngine.SetRTPCValue("RTPC_BypassEffect", 0);
//        AkSoundEngine.SetRTPCValue("RTPC_BypassEffect_Outdoor", 0);
//    }

//    void BypassPlugInEffectsRTPCs(bool isOccluding, string regionName)
//    {
//        if (isOccluding)
//        {
//            switch (regionName)
//            {
//                case "SwitchCavern":
//#if UNITY_EDITOR
//                    if (DebugScript) Debug.Log("Bypass RTPC called values called");
//#endif
//                    AkSoundEngine.SetRTPCValue("RTPC_BypassEffect", 1);
//                    AkSoundEngine.SetRTPCValue("RTPC_BypassEffect_Outdoor", 1);
//                    break;
//                default:
//                    AkSoundEngine.SetRTPCValue("RTPC_BypassEffect", 1);
//                    return;
//            }
//        }
//        else
//        {
//            return;
//        }
//    }
//}


#endregion