void UAnimPreviewInstance::MontagePreview_JumpToEnd()
{
if (UAnimMontage* Montage = Cast<UAnimMontage>(CurrentAsset))
{
int32 SectionIdx = 0;
if (MontagePreviewType == EMPT_Normal)
{
SectionIdx = MontagePreviewStartSectionIdx;
}
// TODO hack - Montage_JumpToSectionsEnd requires montage being played
bool bWasPlaying = IsPlayingMontage();
if (! bWasPlaying)
{
MontagePreview_Restart();
}
if (PlayRate < 0.f)
{
Montage_JumpToSection(Montage->GetSectionName(MontagePreview_FindLastSection(SectionIdx)));
}
else
{
Montage_JumpToSectionsEnd(Montage->GetSectionName(MontagePreview_FindLastSection(SectionIdx)));
}
if (! bWasPlaying)
{
MontagePreview_SetPlaying(false);
}
}
}
void UAnimPreviewInstance::MontagePreview_StepBackward()
{
if (UAnimMontage* Montage = Cast<UAnimMontage>(CurrentAsset))
{
bool bWasPlaying = IsPlayingMontage() && (bLooping || bPlaying); // we need to handle non-looped case separately, even if paused during playthrough
MontagePreview_SetReverse(true);
if (! bWasPlaying)
{
if (! bLooping)
{
float StoppedAt = CurrentTime;
if (! bWasPlaying)
{
// play montage but at last known location
MontagePreview_Restart();
SetPosition(StoppedAt, false);
}
int32 LastPreviewSectionIdx = MontagePreview_FindLastSection(MontagePreviewStartSectionIdx);
if (FMath::Abs(CurrentTime - (Montage->CompositeSections[LastPreviewSectionIdx].GetTime() + Montage->GetSectionLength(LastPreviewSectionIdx))) <= MontagePreview_CalculateStepLength())
{
// special case as we could stop at the end of our last section which is also beginning of following section - we don't want to get stuck there, but be inside of our starting section
Montage_JumpToSection(Montage->GetSectionName(LastPreviewSectionIdx));
}
else if (FMath::Abs(CurrentTime - Montage->CompositeSections[MontagePreviewStartSectionIdx].GetTime()) <= MontagePreview_CalculateStepLength())
{
// we're at the end of playing backward, jump right to the end
Montage_JumpToSectionsEnd(Montage->GetSectionName(MontagePreviewStartSectionIdx));
if (! bWasPlaying)
{
MontagePreview_SetPlaying(false);
}
return; // can't go further than beginning of first section
}
}
else
{
MontagePreview_Restart();
}
}
MontagePreview_SetPlaying(true);
// Advance a single frame, leaving it paused afterwards
int32 NumFrames = Montage->GetNumberOfFrames();
// Add DELTA to prefer next frame when we're close to the boundary
float CurrentFraction = CurrentTime / Montage->SequenceLength + DELTA;
float NextFrame = FMath::Clamp<float>(FMath::FloorToFloat(CurrentFraction * NumFrames) - 1.0f, 0, NumFrames);
float NewTime = Montage->SequenceLength * (NextFrame / NumFrames);
GetSkelMeshComponent()->GlobalAnimRateScale = 1.0f;
GetSkelMeshComponent()->TickAnimation(FMath::Abs(NewTime - CurrentTime));
MontagePreview_SetPlaying(false);
}
}
void UAnimSingleNodeInstance::RestartMontage(UAnimMontage * Montage, FName FromSection)
{
if( Montage == CurrentAsset )
{
Montage_Play(Montage, PlayRate);
if( FromSection != NAME_None )
{
Montage_JumpToSection(FromSection);
}
SetMontageLoop(Montage, bLooping, FromSection);
}
}
void UAnimPreviewInstance::RestartMontage(UAnimMontage* Montage, FName FromSection)
{
if (Montage == CurrentAsset)
{
MontagePreviewType = EMPT_Normal;
Montage_Play(Montage, PlayRate);
if (FromSection != NAME_None)
{
Montage_JumpToSection(FromSection);
}
MontagePreview_SetLoopNormal(bLooping, Montage->GetSectionIndex(FromSection));
}
}
void UAnimPreviewInstance::MontagePreview_PreviewNormal(int32 FromSectionIdx)
{
if (UAnimMontage* Montage = Cast<UAnimMontage>(CurrentAsset))
{
int32 PreviewFromSection = FromSectionIdx;
if (FromSectionIdx != INDEX_NONE)
{
MontagePreviewStartSectionIdx = MontagePreview_FindFirstSectionAsInMontage(FromSectionIdx);
}
else
{
FromSectionIdx = MontagePreviewStartSectionIdx;
PreviewFromSection = MontagePreviewStartSectionIdx;
}
MontagePreviewType = EMPT_Normal;
Montage_Play(Montage, PlayRate);
MontagePreview_SetLoopNormal(bLooping, FromSectionIdx);
Montage_JumpToSection(Montage->GetSectionName(PreviewFromSection));
MontagePreview_RemoveBlendOut();
bPlaying = true;
}
}