public bool IsHearable(IListener listener, IAudioSource source, AudioSourceInfo info)
{
if (info.volume >= listener.config.minHearingVolume)
{
var raycastPosition = new Vector3[]
{
new Vector3(0f, 0f), // Middle
new Vector3(0f, 1f), // Up
new Vector3(0f, -1f), // Down
new Vector3(-1f, 0f), // Left side
new Vector3(1f, 0f), // Right side
};
const int levels = 1;
const float scaling = 1.5f;
for (int i = 1; i < levels + 1; i++)
{
foreach (var pos in raycastPosition)
{
var raycastToPosition = listener.transform.position + (pos * i * scaling);
RaycastHit hitInfo;
bool hit = _raycaster.Linecast(source.transform.position, raycastToPosition, out hitInfo, _config.raycastLayer);
// If nothing was hit the object is visible.
if (hit == false)
{
hitInfo.gameObject = listener.gameObject;
hitInfo.point = raycastToPosition;
hitInfo.normal = Vector3.zero;
}
// Direct path from audio source to listener.
if (_config.debug)
{
LosDebugUtility.DrawDebugLine(source.gameObject, hitInfo.gameObject, listener.gameObject, source.transform.position, hitInfo.point, raycastToPosition, Color.magenta, Color.black);
}
// If we did hit something, is it the target?
if (LosUtility.IsValidTarget(listener.gameObject, hitInfo.gameObject) || hit == false)
{
return(true);
}
}
}
}
return(false);
}
/// <summary>
///
/// </summary>
/// <returns>Returns True when the raycasting is all done. False when more raycasts are required.</returns>
private bool DoRaycast(Vector3 raycastToPosition, SightTargetInfo sightInfo, ref float hits, ref float hitFactor, int sampleCount)
{
RaycastHit hitInfo;
bool hit = raycaster.Linecast(gameObject.transform.position, raycastToPosition, out hitInfo, config.raycastLayer);
// If nothing was hit the object is visible.
if (hit == false)
{
hitInfo.gameObject = sightInfo.target.gameObject;
hitInfo.point = raycastToPosition;
hitInfo.normal = Vector3.zero;
}
#if UNITY_EDITOR
if (config.debug)
{
LosDebugUtility.DrawDebugLine(gameObject, hitInfo.gameObject, sightInfo.target.gameObject, gameObject.transform.position, hitInfo.point, raycastToPosition, config.updateInterval);
}
#endif
// If we did hit something, is it the target?
if (LosUtility.IsValidTarget(sightInfo.target.gameObject, hitInfo.gameObject) || hit == false)
{
hits++;
hitFactor = hits / sampleCount;
// If the sight is already detected we can bail early
if (hitFactor >= GetMinVisibilityFactor(sightInfo.target) && sightInfo.isDetected)
{
return(true);
// break; // Object is already visible no need to keep casting
}
}
return(false);
}