Project: Paper2D

Michael_Noland · June 24, 2015, 9:04pm

Henry Read;315663:

Paper 2D Tile Map Component’s Tile Map Asset Property won’t save with Map Level when Paper 2D Tile Map Component in a Blueprint Actor Class or C++ Actor Class other than PaperTileMapActor. When I close UE4 Editor, and reopen level that just saved, tile map asset property becoms non-exist asset, it is completly black.

I found that PaperTileMapActor has a function
 #if WITH_EDITOR
 bool APaperTileMapActor::GetReferencedContentObjects(TArray&lt;UObject*&gt;& Objects) const
 {
     Super::GetReferencedContentObjects(Objects);
 
     if (const UObject* Asset = RenderComponent-&gt;AdditionalStatObject())
     {
         Objects.Add(const_cast&lt;UObject*&gt;(Asset));
     }
     return true;
 }
 #endif
RenderComponent is UPaperTileMapComponent.

Is it design decision or a defect that has not been fixed yet? It is almost impossible to use PaperTileMapComponent in a Blueprint Actor Class. In C++ Actor class, it is not big problem. Simply add function GetReferencedContentObjects like APaperTileMapActor class will fixes saving problem.

GetReferencedContentObjects is only used for Ctrl+E and Ctrl+B features in editor to sync to or edit asset(s) associated with selected actors in level (and an actor being a Blueprint always trumps that to interact with BP asset instead). It has no bearing on compilation process of a Blueprint.

tile map component getting lost in placed Blueprints is certainly not desired however, it looks like there is an open bug on BP team about issues with tile map components + BPs in standalone or packaged games (UE-16978).

Cheers,