private void UpdateOcclusion()
{
var hasOcclusionOn = GrpVariation.UsesOcclusion;
if (!hasOcclusionOn)
{
if (!_occlusionOnLastFrame)
{
return;
}
_occlusionOnLastFrame = false;
MasterAudio.StopTrackingOcclusionForSource(GrpVariation.GameObj);
ResetToNonOcclusionSetting();
return;
}
_occlusionOnLastFrame = true;
if (_listenerThisFrame == null)
{
// cannot occlude without something to raycast at.
return;
}
if (Time.realtimeSinceStartup - _occlusionLastCalculated <= MasterAudio.ReOccludeCheckTime)
{
// too early, abort and try next frame
return;
}
var lastCalcTime = Time.realtimeSinceStartup;
if (_occlusionLastCalculated == FakeNegativeFloatValue)
{
// spread out the line casts so they're not all on the same frame (for ambient sounds that all start in the Scene).
lastCalcTime += MasterAudio.ReOccludeCheckTime * Random.Range(0f, 0.9f);
}
_occlusionLastCalculated = lastCalcTime;
var direction = _listenerThisFrame.position - Trans.position;
var distanceToListener = direction.magnitude;
if (distanceToListener > VarAudio.maxDistance)
{
// out of hearing range, no reason to calculate occlusion.
MasterAudio.AddToOcclusionOutOfRangeSources(GrpVariation.GameObj);
ResetToNonOcclusionSetting();
return;
}
MasterAudio.AddToOcclusionInRangeSources(GrpVariation.GameObj);
if (GrpVariation.LowPassFilter == null)
{
// in case Occlusion got turned on during runtime.
GrpVariation.gameObject.AddComponent <AudioLowPassFilter>();
}
#if UNITY_4_5 || UNITY_4_6 || UNITY_4_7 || UNITY_5_0 || UNITY_5_1
#else
var is2DRaycast = _maThisFrame.occlusionRaycastMode == MasterAudio.RaycastMode.Physics2D;
var oldQueriesStart = Physics2D.queriesStartInColliders;
if (is2DRaycast)
{
Physics2D.queriesStartInColliders = _maThisFrame.occlusionIncludeStartRaycast2DCollider;
}
#endif
var hitPoint = Vector3.zero;
float?hitDistance = null;
var isHit = false;
if (_maThisFrame.occlusionUseLayerMask)
{
switch (_maThisFrame.occlusionRaycastMode)
{
case MasterAudio.RaycastMode.Physics3D:
RaycastHit hitObject;
if (Physics.Raycast(Trans.position, direction, out hitObject, distanceToListener, _maThisFrame.occlusionLayerMask.value))
{
isHit = true;
hitPoint = hitObject.point;
hitDistance = hitObject.distance;
}
break;
case MasterAudio.RaycastMode.Physics2D:
var castHit2D = Physics2D.Raycast(Trans.position, direction, distanceToListener, _maThisFrame.occlusionLayerMask.value);
if (castHit2D.transform != null)
{
isHit = true;
hitPoint = castHit2D.point;
hitDistance = castHit2D.distance;
}
break;
}
}
else
{
switch (_maThisFrame.occlusionRaycastMode)
{
case MasterAudio.RaycastMode.Physics3D:
RaycastHit hitObject;
if (Physics.Raycast(Trans.position, direction, out hitObject, distanceToListener))
{
isHit = true;
hitPoint = hitObject.point;
hitDistance = hitObject.distance;
}
break;
case MasterAudio.RaycastMode.Physics2D:
var castHit2D = Physics2D.Raycast(Trans.position, direction, distanceToListener);
if (castHit2D.transform != null)
{
isHit = true;
hitPoint = castHit2D.point;
hitDistance = castHit2D.distance;
}
break;
}
}
#if UNITY_4_5 || UNITY_4_6 || UNITY_4_7 || UNITY_5_0 || UNITY_5_1
#else
if (is2DRaycast)
{
Physics2D.queriesStartInColliders = oldQueriesStart;
}
#endif
var endPoint = isHit ? hitPoint : _listenerThisFrame.position;
var lineColor = isHit ? Color.red : Color.green;
if (_maThisFrame.occlusionShowRaycasts)
{
Debug.DrawLine(Trans.position, endPoint, lineColor, .1f);
}
if (!isHit)
{
// ReSharper disable once PossibleNullReferenceException
MasterAudio.RemoveFromBlockedOcclusionSources(GrpVariation.GameObj);
ResetToNonOcclusionSetting();
return;
}
MasterAudio.AddToBlockedOcclusionSources(GrpVariation.GameObj);
var ratioToEdgeOfSound = hitDistance.Value / VarAudio.maxDistance;
var filterFrequency = AudioUtil.GetOcclusionCutoffFrequencyByDistanceRatio(ratioToEdgeOfSound);
// ReSharper disable once PossibleNullReferenceException
GrpVariation.LowPassFilter.cutoffFrequency = filterFrequency;
}
/// <summary>
/// This method is called in a batch from ListenerFollower
/// </summary>
/// <returns></returns>
public bool RayCastForOcclusion()
{
DoneWithOcclusion();
var raycastOrigin = Trans.position;
var offset = RayCastOriginOffset;
if (offset > 0)
{
raycastOrigin = Vector3.MoveTowards(raycastOrigin, _listenerThisFrame.position, offset);
}
var direction = _listenerThisFrame.position - raycastOrigin;
var distanceToListener = direction.magnitude;
if (distanceToListener > VarAudio.maxDistance)
{
// out of hearing range, no reason to calculate occlusion.
MasterAudio.AddToOcclusionOutOfRangeSources(GrpVariation.GameObj);
ResetToNonOcclusionSetting();
return(false);
}
MasterAudio.AddToOcclusionInRangeSources(GrpVariation.GameObj);
var is2DRaycast = _maThisFrame.occlusionRaycastMode == MasterAudio.RaycastMode.Physics2D;
if (GrpVariation.LowPassFilter == null)
{
// in case Occlusion got turned on during runtime.
var newFilter = GrpVariation.gameObject.AddComponent <AudioLowPassFilter>();
GrpVariation.LowPassFilter = newFilter;
}
var oldQueriesStart = Physics2D.queriesStartInColliders;
if (is2DRaycast)
{
Physics2D.queriesStartInColliders = _maThisFrame.occlusionIncludeStartRaycast2DCollider;
}
var oldRaycastsHitTriggers = true;
// ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
if (is2DRaycast)
{
oldRaycastsHitTriggers = Physics2D.queriesHitTriggers;
Physics2D.queriesHitTriggers = _maThisFrame.occlusionRaycastsHitTriggers;
}
else
{
oldRaycastsHitTriggers = Physics.queriesHitTriggers;
Physics.queriesHitTriggers = _maThisFrame.occlusionRaycastsHitTriggers;
}
var hitPoint = Vector3.zero;
float?hitDistance = null;
var isHit = false;
if (_maThisFrame.occlusionUseLayerMask)
{
switch (_maThisFrame.occlusionRaycastMode)
{
case MasterAudio.RaycastMode.Physics3D:
RaycastHit hitObject;
if (Physics.Raycast(raycastOrigin, direction, out hitObject, distanceToListener, _maThisFrame.occlusionLayerMask.value))
{
isHit = true;
hitPoint = hitObject.point;
hitDistance = hitObject.distance;
}
break;
case MasterAudio.RaycastMode.Physics2D:
var castHit2D = Physics2D.Raycast(raycastOrigin, direction, distanceToListener, _maThisFrame.occlusionLayerMask.value);
if (castHit2D.transform != null)
{
isHit = true;
hitPoint = castHit2D.point;
hitDistance = castHit2D.distance;
}
break;
}
}
else
{
switch (_maThisFrame.occlusionRaycastMode)
{
case MasterAudio.RaycastMode.Physics3D:
RaycastHit hitObject;
if (Physics.Raycast(raycastOrigin, direction, out hitObject, distanceToListener))
{
isHit = true;
hitPoint = hitObject.point;
hitDistance = hitObject.distance;
}
break;
case MasterAudio.RaycastMode.Physics2D:
var castHit2D = Physics2D.Raycast(raycastOrigin, direction, distanceToListener);
if (castHit2D.transform != null)
{
isHit = true;
hitPoint = castHit2D.point;
hitDistance = castHit2D.distance;
}
break;
}
}
if (is2DRaycast)
{
Physics2D.queriesStartInColliders = oldQueriesStart;
Physics2D.queriesHitTriggers = oldRaycastsHitTriggers;
}
else
{
Physics.queriesHitTriggers = oldRaycastsHitTriggers;
}
if (_maThisFrame.occlusionShowRaycasts)
{
var endPoint = isHit ? hitPoint : _listenerThisFrame.position;
var lineColor = isHit ? Color.red : Color.green;
Debug.DrawLine(raycastOrigin, endPoint, lineColor, .1f);
}
if (!isHit)
{
// ReSharper disable once PossibleNullReferenceException
MasterAudio.RemoveFromBlockedOcclusionSources(GrpVariation.GameObj);
ResetToNonOcclusionSetting();
return(true);
}
MasterAudio.AddToBlockedOcclusionSources(GrpVariation.GameObj);
var ratioToEdgeOfSound = hitDistance.Value / VarAudio.maxDistance;
var filterFrequency = AudioUtil.GetOcclusionCutoffFrequencyByDistanceRatio(ratioToEdgeOfSound, this);
var fadeTime = _maThisFrame.occlusionFreqChangeSeconds;
if (fadeTime <= MasterAudio.InnerLoopCheckInterval) // fast, just do it instantly.
// ReSharper disable once PossibleNullReferenceException
{
GrpVariation.LowPassFilter.cutoffFrequency = filterFrequency;
return(true);
}
MasterAudio.GradualOcclusionFreqChange(GrpVariation, fadeTime, filterFrequency);
return(true);
}