void STileLayerList::MergeLayerDown()
{
if (UPaperTileMap* TileMap = TileMapPtr.Get())
{
const int32 SourceIndex = GetSelectionIndex();
const int32 TargetIndex = SourceIndex + 1;
if ((SourceIndex != INDEX_NONE) && (TargetIndex != INDEX_NONE))
{
const FScopedTransaction Transaction(LOCTEXT("TileMapMergeLayerDown", "Merge Layer Down"));
TileMap->SetFlags(RF_Transactional);
TileMap->Modify();
UPaperTileLayer* SourceLayer = TileMap->TileLayers[SourceIndex];
UPaperTileLayer* TargetLayer = TileMap->TileLayers[TargetIndex];
TargetLayer->SetFlags(RF_Transactional);
TargetLayer->Modify();
// Copy the non-empty tiles from the source to the target layer
for (int32 Y = 0; Y < SourceLayer->LayerWidth; ++Y)
{
for (int32 X = 0; X < SourceLayer->LayerWidth; ++X)
{
FPaperTileInfo TileInfo = SourceLayer->GetCell(X, Y);
if (TileInfo.IsValid())
{
TargetLayer->SetCell(X, Y, TileInfo);
}
}
}
// Remove the source layer
TileMap->TileLayers.RemoveAt(SourceIndex);
// Update viewers
PostEditNotfications();
}
}
}
void UPaperTileMapComponent::GetUsedTextures(TArray<UTexture*>& OutTextures, EMaterialQualityLevel::Type QualityLevel)
{
// Get the texture referenced by the tile maps
if (TileMap != nullptr)
{
for (UPaperTileLayer* Layer : TileMap->TileLayers)
{
for (int32 Y = 0; Y < TileMap->MapHeight; ++Y)
{
for (int32 X = 0; X < TileMap->MapWidth; ++X)
{
FPaperTileInfo TileInfo = Layer->GetCell(X, Y);
if (TileInfo.IsValid() && (TileInfo.TileSet != nullptr) && (TileInfo.TileSet->TileSheet != nullptr))
{
OutTextures.AddUnique(TileInfo.TileSet->TileSheet);
}
}
}
}
}
// Get any textures referenced by our materials
Super::GetUsedTextures(OutTextures, QualityLevel);
}