UMovieSceneSection* MovieSceneHelpers::FindSectionAtTime( const TArray<UMovieSceneSection*>& Sections, float Time )
{
for( int32 SectionIndex = 0; SectionIndex < Sections.Num(); ++SectionIndex )
{
UMovieSceneSection* Section = Sections[SectionIndex];
//@todo Sequencer - There can be multiple sections overlapping in time. Returning instantly does not account for that.
if( Section->IsTimeWithinSection( Time ) && Section->IsActive() )
{
return Section;
}
}
return NULL;
}
UMovieSceneSection* MovieSceneHelpers::FindNearestSectionAtTime( const TArray<UMovieSceneSection*>& Sections, float Time )
{
// Only update the section if the position is within the time span of the section
// Or if there are no sections at the time, the left closest section to the time
// Or in the case that Time is before all sections, take the section with the earliest start time
UMovieSceneSection* ClosestSection = nullptr;
float ClosestSectionTime = 0.f;
UMovieSceneSection* EarliestSection = nullptr;
float EarliestSectionTime = 0.f;
for( int32 SectionIndex = 0; SectionIndex < Sections.Num(); ++SectionIndex )
{
UMovieSceneSection* Section = Sections[SectionIndex];
if (Section->IsActive())
{
//@todo Sequencer - There can be multiple sections overlapping in time. Returning instantly does not account for that.
if( Section->IsTimeWithinSection( Time ) )
{
return Section;
}
float EndTime = Section->GetEndTime();
if (EndTime < Time)
{
float ClosestTime = Time - EndTime;
if (!ClosestSection || ClosestTime < ClosestSectionTime)
{
ClosestSection = Section;
ClosestSectionTime = ClosestTime;
}
}
float StartTime = Section->GetStartTime();
if (!EarliestSection || StartTime < EarliestSectionTime)
{
EarliestSection = Section;
EarliestSectionTime = StartTime;
}
}
}
// if we get here, we are off of any section
// if ClosestSection, then we take the closest to left of this time
// else, we take the EarliestSection
// if that's nullptr, then there are no sections
return ClosestSection ? ClosestSection : EarliestSection;
}