bool USoundBase::IsAudible( const FVector &SourceLocation, const FVector &ListenerLocation, AActor* SourceActor, bool& bIsOccluded, bool bCheckOcclusion )
{
//@fixme - naive implementation, needs to be optimized
// for now, check max audible distance, and also if looping
check( SourceActor );
// Account for any portals
const FVector ModifiedSourceLocation = SourceLocation;
const float MaxDist = GetMaxAudibleDistance();
if( MaxDist * MaxDist >= ( ListenerLocation - ModifiedSourceLocation ).SizeSquared() )
{
// Can't line check through portals
if( bCheckOcclusion && ( MaxDist != WORLD_MAX ) && ( ModifiedSourceLocation == SourceLocation ) )
{
static FName NAME_IsAudible(TEXT("IsAudible"));
// simple trace occlusion check - reduce max audible distance if occluded
bIsOccluded = SourceActor->GetWorld()->LineTraceTest(ModifiedSourceLocation, ListenerLocation, ECC_Visibility, FCollisionQueryParams(NAME_IsAudible, true, SourceActor));
}
return true;
}
else
{
return false;
}
}
bool USoundBase::IsAudibleSimple( const FVector Location )
{
// No audio device means no listeners to check against
if( !GEngine || !GEngine->GetAudioDevice() )
{
return true ;
}
// Listener position could change before long sounds finish
if( GetDuration() > 1.0f )
{
return true ;
}
// Is this SourceActor within the MaxAudibleDistance of any of the listeners?
return GEngine->GetAudioDevice()->LocationIsAudible( Location, GetMaxAudibleDistance() );
}
bool USoundBase::IsAudibleSimple( const FVector Location, USoundAttenuation* AttenuationSettings )
{
// No audio device means no listeners to check against
if( !GEngine || !GEngine->GetAudioDevice() )
{
return true ;
}
// Listener position could change before long sounds finish
if( GetDuration() > 1.0f )
{
return true ;
}
// Is this SourceActor within the MaxAudibleDistance of any of the listeners?
float MaxAudibleDistance = AttenuationSettings != nullptr ? AttenuationSettings->Attenuation.GetMaxDimension() : GetMaxAudibleDistance();
return GEngine->GetAudioDevice()->LocationIsAudible( Location, MaxAudibleDistance );
}