void ACullDistanceVolume::GetPrimitiveMaxDrawDistances(TMap<UPrimitiveComponent*,float>& OutCullDistances)
{
// Nothing to do if there is no brush component or no cull distances are set
if( BrushComponent && CullDistances.Num() > 0 && bEnabled )
{
// Test center of mesh bounds to see whether it is encompassed by volume
// and propagate cull distance if it is.
for( FActorIterator It(GetWorld()); It; ++It )
{
AActor* Owner = *It;
UPrimitiveComponent* PrimitiveComponent = Owner->FindComponentByClass<UPrimitiveComponent>();
if (PrimitiveComponent)
{
// Check whether primitive can be affected by cull distance volumes.
if( Owner && ACullDistanceVolume::CanBeAffectedByVolumes( PrimitiveComponent ) )
{
// Check whether primitive supports cull distance volumes and its center point is being encompassed by this volume.
if( EncompassesPoint( Owner->GetActorLocation() ) )
{
// Find best match in CullDistances array.
float PrimitiveSize = PrimitiveComponent->Bounds.SphereRadius * 2;
float CurrentError = FLT_MAX;
float CurrentCullDistance = 0;
for( int32 CullDistanceIndex=0; CullDistanceIndex<CullDistances.Num(); CullDistanceIndex++ )
{
const FCullDistanceSizePair& CullDistancePair = CullDistances[CullDistanceIndex];
if( FMath::Abs( PrimitiveSize - CullDistancePair.Size ) < CurrentError )
{
CurrentError = FMath::Abs( PrimitiveSize - CullDistancePair.Size );
CurrentCullDistance = CullDistancePair.CullDistance;
}
}
float* CurrentDistPtr = OutCullDistances.Find(PrimitiveComponent);
check(CurrentDistPtr);
// LD or other volume specified cull distance, use minimum of current and one used for this volume.
if( *CurrentDistPtr > 0 )
{
OutCullDistances.Add(PrimitiveComponent, FMath::Min( *CurrentDistPtr, CurrentCullDistance ));
}
// LD didn't specify cull distance, use current setting directly.
else
{
OutCullDistances.Add(PrimitiveComponent, CurrentCullDistance);
}
}
}
}
}
}
}
void ACullDistanceVolume::GetPrimitiveMaxDrawDistances(TMap<UPrimitiveComponent*,float>& OutCullDistances)
{
// Nothing to do if there is no brush component or no cull distances are set
if (GetBrushComponent() && CullDistances.Num() > 0 && bEnabled)
{
for (auto It(OutCullDistances.CreateIterator()); It; ++It)
{
UPrimitiveComponent* PrimitiveComponent = It.Key();
// Check whether primitive can be affected by cull distance volumes.
if( ACullDistanceVolume::CanBeAffectedByVolumes( PrimitiveComponent ) )
{
// Check whether primitive supports cull distance volumes and its center point is being encompassed by this volume.
if( EncompassesPoint( PrimitiveComponent->GetComponentLocation() ) )
{
// Find best match in CullDistances array.
float PrimitiveSize = PrimitiveComponent->Bounds.SphereRadius * 2;
float CurrentError = FLT_MAX;
float CurrentCullDistance = 0;
for( int32 CullDistanceIndex=0; CullDistanceIndex<CullDistances.Num(); CullDistanceIndex++ )
{
const FCullDistanceSizePair& CullDistancePair = CullDistances[CullDistanceIndex];
if( FMath::Abs( PrimitiveSize - CullDistancePair.Size ) < CurrentError )
{
CurrentError = FMath::Abs( PrimitiveSize - CullDistancePair.Size );
CurrentCullDistance = CullDistancePair.CullDistance;
}
}
float& CullDistance = It.Value();
// LD or other volume specified cull distance, use minimum of current and one used for this volume.
if (CullDistance > 0)
{
CullDistance = FMath::Min(CullDistance, CurrentCullDistance);
}
// LD didn't specify cull distance, use current setting directly.
else
{
CullDistance = CurrentCullDistance;
}
}
}
}
}
}
