void DrawDebugPath()
{
if (_los)
{
Debug.DrawLine(_sourceTransform.position, _listenerTransform.position, Color.red);
}
else
{
Color lineColor = Color.red;
if (_nearestNodeToListener != null)
{
Debug.DrawLine(_listenerTransform.position, _nearestNodeToListener.position, lineColor);
}
Node currentNode = _nearestNodeToListener;
while (currentNode != null && _transientNodes.ContainsKey(currentNode))
{
TransientNode tNode = _transientNodes[currentNode];
Node parentNode = tNode.parent;
if (parentNode != null)
{
Debug.DrawLine(currentNode.position, parentNode.position, lineColor);
}
else
{
Debug.DrawLine(currentNode.position, _sourceTransform.position, lineColor);
}
currentNode = parentNode;
}
}
}
void UpdateAudioSettings()
{
// Find nearest node to listener.
_nearestNodeToListener = NearestNodeInLOS(_listenerTransform.position);
if (_nearestNodeToListener == null)
{
Debug.Log("[Propagate] No PropagateNodes in line of sight of listener.");
_nearestNodeToListener = NearestNode(_listenerTransform.position);
if (_nearestNodeToListener == null)
{
Debug.LogError("[Propagate] No PropagateNodes near listener. Falling back to standard audio source.");
audioSource.volume = 1.0f;
this.enabled = false;
return;
}
}
// Find the last visible node along the path.
Node currentNode = _nearestNodeToListener;
while (currentNode != null && _transientNodes.ContainsKey(currentNode))
{
TransientNode tNode = _transientNodes[currentNode];
if (tNode.parent != null)
{
if (CheckLOSToNode(tNode.parent, _listenerTransform.position))
{
_nearestNodeToListener = tNode.parent;
}
else
{
break;
}
}
currentNode = tNode.parent;
}
if (drawDebugPath)
{
//Debug.DrawLine(_listenerTransform.position, _nearestNodeToListener.position, Color.red);
}
TransientNode nearestTNodeToListener;
bool didGetNearestNode = _transientNodes.TryGetValue(_nearestNodeToListener, out nearestTNodeToListener);
if (!didGetNearestNode)
{
Debug.LogError("[Propagate] No node near to listener.");
}
// Add the distance from last node to listener.
float nodeListenerDist = Vector3.Distance(_nearestNodeToListener.position, _listenerTransform.position);
float totalDistance = nearestTNodeToListener.distanceToSource + nodeListenerDist;
// Move the audio source.
_perceivedPosition = Vector3.Lerp(_sourceTransform.position, _nearestNodeToListener.position, profile.percievedPositionEffect);
Vector3 listenerNodeDirection = (_perceivedPosition - _listenerTransform.position).normalized;
_perceivedPosition = _listenerTransform.position + (listenerNodeDirection * totalDistance);
// Calculate the lowpass.
float maxAngle = profile.frequencySettings.maxAngle;
float normalizedAngle = RemapFloat(nearestTNodeToListener.curvatureToSource * Mathf.Rad2Deg, 0f, maxAngle, 0f, 1f);
float normalizedFrequency = profile.frequencySettings.curve.Evaluate(normalizedAngle);
_cutoffFrequency = RemapFloat(normalizedFrequency,
0f, 1f,
profile.frequencySettings.minCutoff,
profile.frequencySettings.maxCutoff);
// Calculate volume reduction due to blocked LOS.
_volume = 1.0f;
RaycastHit hitInfo;
if (Physics.Linecast(_listenerTransform.position, _nearestNodeToListener.position, out hitInfo) && !hitInfo.collider.CompareTag("Player"))
{
AudioOccluder occluder = hitInfo.collider.GetComponent <AudioOccluder>();
if (occluder != null)
{
_volume *= 1f - occluder.volumeReduction;
_cutoffFrequency *= 1f - occluder.frequencyReduction;
}
else
{
_volume *= 1f - profile.occlusionSettings.volumeReduction;
_cutoffFrequency *= 1f - profile.occlusionSettings.frequencyReduction;
}
}
currentNode = _nearestNodeToListener;
while (currentNode != null && _transientNodes.ContainsKey(currentNode))
{
TransientNode tNode = _transientNodes[currentNode];
if (tNode.parent != null && Physics.Linecast(currentNode.position, tNode.parent.position, out hitInfo))
{
AudioOccluder occluder = hitInfo.collider.GetComponent <AudioOccluder>();
if (occluder != null)
{
_volume *= 1f - occluder.volumeReduction;
_cutoffFrequency *= 1f - occluder.frequencyReduction;
}
else
{
_volume *= 1f - profile.occlusionSettings.volumeReduction;
_cutoffFrequency *= 1f - profile.occlusionSettings.frequencyReduction;
}
}
currentNode = tNode.parent;
}
}
void Propagate()
{
_transientNodes.Clear();
var openNodes = new List <Node>();
// Find nearest node.
Node nearestNode = NearestNodeInLOS(_sourceTransform.position);
if (nearestNode == null)
{
Debug.LogError("[Propagate] Could not find PropagateNode in line of sight to audio source. Falling back to standard Audio Source.");
audioSource.volume = 1.0f;
this.enabled = false;
return;
}
Node currentNode = nearestNode;
_transientNodes[currentNode] = new TransientNode()
{
parent = null
};
while (currentNode != null)
{
TransientNode tNode = _transientNodes[currentNode];
if (tNode.parent != null)
{
TransientNode parentTNode = _transientNodes[tNode.parent];
tNode.distanceToSource = parentTNode.distanceToSource + Vector3.Distance(tNode.parent.position, currentNode.position);
tNode.direction = Quaternion.Euler((currentNode.position - tNode.parent.position).normalized);
tNode.curvatureToSource = parentTNode.curvatureToSource + Quaternion.Angle(parentTNode.direction, tNode.direction);
}
else
{
tNode.distanceToSource = Vector3.Distance(currentNode.position, _sourceTransform.position);
tNode.curvatureToSource = 0;
tNode.direction = Quaternion.identity;
tNode.parent = null;
}
_transientNodes[currentNode] = tNode;
foreach (var connectedNode in currentNode.connections)
{
if (!_transientNodes.ContainsKey(connectedNode) && !openNodes.Contains(connectedNode))
{
openNodes.Add(connectedNode);
_transientNodes[connectedNode] = new TransientNode()
{
parent = currentNode
};
}
}
if (openNodes.Count > 0)
{
currentNode = openNodes[0];
openNodes.RemoveAt(0);
}
else
{
currentNode = null;
}
}
}