Inconsistent referencing behavior

Development Programming & Scripting Blueprint
1

Hello There!

To start off with the UE4 I am creating a little game in which you have to bring glasses to tables, I am running into trouble sharing information between blueprints, I have tried to find a solution to my problem in many places but i dont understand what i am doing wrong.

I use:

-Glass_BP
-GlassesSpawn_BP (A volume with a little function that spawn the glasses inside this volume)
-TablesInformation_BP (Holds an array (TablesArray) of all the tables in the map)

When the glasses spawn I want each instance of the Glass_BP to access TablesInformation_BP and store the TablesArray into their own TablesArray_Ref.
In the Glass_BP I created a variable and made it off type object: TablesInformation_BP_C, I set the variable to public (open the eye box). Now I place one glass in the scene and in its details I set the default value of TablesInformation_Ref to TeblesInformation_BP. When I now launch the game, that one Glass_BP I placed in the scene by dragging does not fail when casting BUT does not have any information in its TablesArray_Ref. And all the glasses created by the SpawnGlasses_BP are not even capable of casting and their default value for TablesInformation_BP_Ref is empty.

What am I doing wrong? I have looked in many places for three days already but I cant seem to figure out my mistake :frowning:

Thanks a million for the help!

0911efca91492128457e5bfa3cab6c1c2991d142.jpeg

can you see the helpless look in his eyes!!?

53a3b7d3d289f0a375252e0f7fe41c225c634f4d.jpeg

2

By changing the locationof the cast function (from Contruction Script to Event Graph) in the glass_BP the glass that was placed in the scene is now able to access the proper information, the only question remaining now is:

How do I allow the glasses that are spawned by GlassesSpawn_BP to also refere their TablesInformation_Ref to TablesInformation_BP?

Thanks!

3

I found a solution, I dont know if this is a proper way of doing things… but it seems to work! :smiley:

I am sorry for posting a question and finding the answer myself, maybe it can still be helpfull for anybody else.

6991ed9979bb55e447d684b70ec5f40045d2018a.jpeg

4

no need to be sorry, you are doing a good job. there is something you can consider:

  1. to get TableInformation_BP you can do it during construction script, for any BP object that wish to use it later after game started.
    2.you can always make the _Ref variable editable and either drag drop or select existing objects from editor.(if the object is a level object show up in outliner)