public void PreviousSlide()
{
var hasChangedSlide = false;
if (AttachedObject._slideItem != null && AttachedObject._slideItem.slidesContainer.PrevSlideAvailable())
{
hasChangedSlide = AttachedObject._slideItem.slidesContainer.DecreaseSlideIndex();
if (hasChangedSlide)
{
if (AttachedObject._oneShotSource != null)
{
AttachedObject._oneShotSource.PlayOneShot(AudioType.Projector_Prev);
}
if (AttachedObject.IsProjectorFullyLit())
{
AttachedObject._slideItem.slidesContainer.SetCurrentRead();
AttachedObject._slideItem.slidesContainer.TryPlayMusicForCurrentSlideTransition(false);
}
}
}
if (AttachedObject._gearInterface != null)
{
var audioVolume = hasChangedSlide ? 0f : 0.5f;
AttachedObject._gearInterface.AddRotation(-45f, audioVolume);
}
}