bool FAnimationSequenceThumbnailScene::SetAnimation(UAnimSequenceBase* InAnimation)
{
PreviewActor->GetSkeletalMeshComponent()->OverrideMaterials.Empty();
bool bSetSucessfully = false;
PreviewAnimation = InAnimation;
if (InAnimation)
{
if (USkeleton* Skeleton = InAnimation->GetSkeleton())
{
USkeletalMesh* PreviewSkeletalMesh = Skeleton->GetAssetPreviewMesh(InAnimation);
PreviewActor->GetSkeletalMeshComponent()->SetSkeletalMesh(PreviewSkeletalMesh);
if (PreviewSkeletalMesh)
{
bSetSucessfully = true;
if (InAnimation->IsValidToPlay())
{
// Handle posing the mesh at the middle of the animation
const float AnimPosition = InAnimation->SequenceLength / 2.f;
UDebugSkelMeshComponent* MeshComponent = CastChecked<UDebugSkelMeshComponent>(PreviewActor->GetSkeletalMeshComponent());
MeshComponent->EnablePreview(true, InAnimation);
MeshComponent->Play(false);
MeshComponent->Stop();
MeshComponent->SetPosition(AnimPosition, false);
UAnimSingleNodeInstance* SingleNodeInstance = PreviewActor->GetSkeletalMeshComponent()->GetSingleNodeInstance();
if (SingleNodeInstance)
{
SingleNodeInstance->UpdateMontageWeightForTimeSkip(AnimPosition);
}
PreviewActor->GetSkeletalMeshComponent()->RefreshBoneTransforms(nullptr);
}
PreviewActor->SetActorLocation(FVector(0, 0, 0), false);
PreviewActor->GetSkeletalMeshComponent()->UpdateBounds();
// Center the mesh at the world origin then offset to put it on top of the plane
const float BoundsZOffset = GetBoundsZOffset(PreviewActor->GetSkeletalMeshComponent()->Bounds);
PreviewActor->SetActorLocation(-PreviewActor->GetSkeletalMeshComponent()->Bounds.Origin + FVector(0, 0, BoundsZOffset), false);
PreviewActor->GetSkeletalMeshComponent()->RecreateRenderState_Concurrent();
}
}
}
if(!bSetSucessfully)
{
CleanupComponentChildren(PreviewActor->GetSkeletalMeshComponent());
PreviewActor->GetSkeletalMeshComponent()->SetAnimation(NULL);
PreviewActor->GetSkeletalMeshComponent()->SetSkeletalMesh(nullptr);
}
return bSetSucessfully;
}
