FVector2D FParticleSection::GetKeyBrushOrigin( FKeyHandle KeyHandle ) const
{
UMovieSceneParticleSection* ParticleSection = Cast<UMovieSceneParticleSection>( &Section );
if ( ParticleSection != nullptr )
{
FIntegralKey ParticleKey = ParticleSection->GetParticleCurve().GetKey(KeyHandle);
if ( (EParticleKey::Type)ParticleKey.Value == EParticleKey::Activate )
{
return FVector2D(-1.0f, 1.0f);
}
else if ( (EParticleKey::Type)ParticleKey.Value == EParticleKey::Deactivate )
{
return FVector2D(1.0f, 1.0f);
}
}
return FVector2D(0.0f, 0.0f);
}
const FSlateBrush* FParticleSection::GetKeyBrush( FKeyHandle KeyHandle ) const
{
UMovieSceneParticleSection* ParticleSection = Cast<UMovieSceneParticleSection>( &Section );
if ( ParticleSection != nullptr )
{
FIntegralKey ParticleKey = ParticleSection->GetParticleCurve().GetKey(KeyHandle);
if ( (EParticleKey::Type)ParticleKey.Value == EParticleKey::Activate )
{
return LeftKeyBrush;
}
else if ( (EParticleKey::Type)ParticleKey.Value == EParticleKey::Deactivate )
{
return RightKeyBrush;
}
}
return nullptr;
}
void FMatineeImportTools::CopyInterpParticleTrack( TSharedRef<ISequencer> Sequencer, UInterpTrackToggle* MatineeToggleTrack, UMovieSceneParticleTrack* ParticleTrack )
{
const FScopedTransaction Transaction( NSLOCTEXT( "Sequencer", "PasteMatineeParticleTrack", "Paste Matinee particle track" ) );
bool bSectionCreated = false;
ParticleTrack->Modify();
float KeyTime = MatineeToggleTrack->GetKeyframeTime( 0 );
UMovieSceneParticleSection* Section = Cast<UMovieSceneParticleSection>( MovieSceneHelpers::FindSectionAtTime( ParticleTrack->GetAllSections(), KeyTime ) );
if ( Section == nullptr )
{
Section = Cast<UMovieSceneParticleSection>( ParticleTrack->CreateNewSection() );
ParticleTrack->AddSection( *Section );
bSectionCreated = true;
}
if (Section->TryModify())
{
float SectionMin = Section->GetStartTime();
float SectionMax = Section->GetEndTime();
FIntegralCurve& ParticleCurve = Section->GetParticleCurve();
for ( const auto& Key : MatineeToggleTrack->ToggleTrack )
{
EParticleKey::Type ParticleKey;
if ( TryConvertMatineeToggleToOutParticleKey( Key.ToggleAction, ParticleKey ) )
{
ParticleCurve.AddKey( Key.Time, (int32)ParticleKey, ParticleCurve.FindKey( Key.Time ) );
}
SectionMin = FMath::Min( SectionMin, Key.Time );
SectionMax = FMath::Max( SectionMax, Key.Time );
}
Section->SetStartTime( SectionMin );
Section->SetEndTime( SectionMax );
if ( bSectionCreated )
{
Sequencer->NotifyMovieSceneDataChanged();
}
}
}
int32 FParticleSection::OnPaintSection( FSequencerSectionPainter& InPainter ) const
{
TSharedPtr<ISequencer> OwningSequencer = OwningSequencerPtr.Pin();
if (!OwningSequencer.IsValid())
{
return InPainter.LayerId + 1;
}
const ESlateDrawEffect::Type DrawEffects = InPainter.bParentEnabled ? ESlateDrawEffect::None : ESlateDrawEffect::DisabledEffect;
UMovieSceneParticleSection* AnimSection = Cast<UMovieSceneParticleSection>( &Section );
const FTimeToPixel& TimeToPixelConverter = InPainter.GetTimeConverter();
FLinearColor TrackColor;
// @todo Sequencer - These values should be cached and then refreshed only when the particle system changes.
bool bIsLooping = false;
float LastEmitterEndTime = 0;
UMovieSceneParticleSection* ParticleSection = Cast<UMovieSceneParticleSection>( &Section );
if ( ParticleSection != nullptr )
{
UMovieSceneParticleTrack* ParentTrack = Cast<UMovieSceneParticleTrack>( ParticleSection->GetOuter() );
if ( ParentTrack != nullptr )
{
TrackColor = ParentTrack->GetColorTint();
FGuid ObjectHandle;
for ( const FMovieSceneBinding& Binding : OwningSequencer->GetFocusedMovieSceneSequence()->GetMovieScene()->GetBindings() )
{
if ( Binding.GetTracks().Contains( ParentTrack ) )
{
ObjectHandle = Binding.GetObjectGuid();
break;
}
}
if ( ObjectHandle.IsValid() )
{
UObject* BoundObject = OwningSequencer->GetFocusedMovieSceneSequenceInstance()->FindObject( ObjectHandle, *OwningSequencer );
UParticleSystemComponent* ParticleSystemComponent = Cast<UParticleSystemComponent>(BoundObject);
if(AEmitter* ParticleSystemActor = Cast<AEmitter>(BoundObject))
{
ParticleSystemComponent = ParticleSystemActor->GetParticleSystemComponent();
}
if ( ParticleSystemComponent != nullptr && ParticleSystemComponent->Template != nullptr )
{
for ( UParticleEmitter* Emitter : ParticleSystemComponent->Template->Emitters )
{
UParticleModuleRequired* RequiredModule = Emitter->GetLODLevel( 0 )->RequiredModule;
bIsLooping |= RequiredModule->EmitterLoops == 0;
LastEmitterEndTime = FMath::Max( LastEmitterEndTime, RequiredModule->EmitterDelay + RequiredModule->EmitterDuration );
}
}
}
}
}
// @todo Sequencer - This should only draw the visible ranges.
TArray<TRange<float>> DrawRanges;
TOptional<float> CurrentRangeStart;
for ( auto KeyIterator = ParticleSection->GetParticleCurve().GetKeyIterator(); KeyIterator; ++KeyIterator )
{
FIntegralKey Key = *KeyIterator;
if ( (EParticleKey::Type)Key.Value == EParticleKey::Activate )
{
if ( CurrentRangeStart.IsSet() == false )
{
CurrentRangeStart = Key.Time;
}
else
{
if ( bIsLooping == false )
{
if ( Key.Time > CurrentRangeStart.GetValue() + LastEmitterEndTime )
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), CurrentRangeStart.GetValue() + LastEmitterEndTime ) );
}
else
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), Key.Time ) );
}
CurrentRangeStart = Key.Time;
}
}
}
if ( (EParticleKey::Type)Key.Value == EParticleKey::Deactivate )
{
if ( CurrentRangeStart.IsSet() )
{
if (bIsLooping)
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), Key.Time ) );
}
else
{
if ( Key.Time > CurrentRangeStart.GetValue() + LastEmitterEndTime )
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), CurrentRangeStart.GetValue() + LastEmitterEndTime ) );
}
else
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), Key.Time ) );
}
}
CurrentRangeStart.Reset();
}
}
}
if ( CurrentRangeStart.IsSet() )
{
if ( bIsLooping )
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), OwningSequencer->GetViewRange().GetUpperBoundValue() ) );
}
else
{
DrawRanges.Add( TRange<float>( CurrentRangeStart.GetValue(), CurrentRangeStart.GetValue() + LastEmitterEndTime ) );
}
}
for ( const TRange<float>& DrawRange : DrawRanges )
{
float XOffset = TimeToPixelConverter.TimeToPixel(DrawRange.GetLowerBoundValue());
float XSize = TimeToPixelConverter.TimeToPixel(DrawRange.GetUpperBoundValue()) - XOffset;
FSlateDrawElement::MakeBox(
InPainter.DrawElements,
InPainter.LayerId,
InPainter.SectionGeometry.ToPaintGeometry( FVector2D( XOffset, (InPainter.SectionGeometry.GetLocalSize().Y - SequencerSectionConstants::KeySize.Y) / 2 ), FVector2D( XSize, SequencerSectionConstants::KeySize.Y ) ),
FEditorStyle::GetBrush( "Sequencer.Section.Background" ),
InPainter.SectionClippingRect,
DrawEffects
);
FSlateDrawElement::MakeBox(
InPainter.DrawElements,
InPainter.LayerId,
InPainter.SectionGeometry.ToPaintGeometry( FVector2D( XOffset, (InPainter.SectionGeometry.GetLocalSize().Y - SequencerSectionConstants::KeySize.Y) / 2 ), FVector2D( XSize, SequencerSectionConstants::KeySize.Y ) ),
FEditorStyle::GetBrush( "Sequencer.Section.BackgroundTint" ),
InPainter.SectionClippingRect,
DrawEffects,
TrackColor
);
}
return InPainter.LayerId+1;
}
void FParticleSection::GenerateSectionLayout( class ISectionLayoutBuilder& LayoutBuilder ) const
{
UMovieSceneParticleSection* ParticleSection = Cast<UMovieSceneParticleSection>( &Section );
LayoutBuilder.SetSectionAsKeyArea( MakeShareable( new FEnumKeyArea( ParticleSection->GetParticleCurve(), ParticleSection, ParticleKeyEnum ) ) );
}
