Reading/Writing Variables

[Straxus]

@M3rl1n;5540

As an example of what I was trying to do:

Say you had gold in your game, you want blueprint instances in your level to give/take gold, you want that to update the current gold you have and you want that represented on the HUD.

Right now the only way I could get this behavior to work was to use functions in a blueprint interface, execute one of those function in the blueprint instance, which updates a value in the game mode. Then have a function executed in the HUD that grabs the value from the game mode.

The only reason why that works is because of the “Get Player Character”, “Get Player Controller”, “Get Game Mode” nodes which output objects, and those can be hooked into the blueprint interface functions that are being executed in the instance and HUD.

That’s the only way I could see to update the HUD, for example, because it can’t talk to any other blueprint except those three exceptions.

Maybe that’s the intended workflow, there’s just no mention of that anywhere that I could find so it took awhile to find those and get my head around it.

If you’re using a custom HUD and need to reference your particular instance of that HUD being used in-game, you can use the Cast To function to be able to access the variables (and functions) on your HUD for read and write. Here’s what that setup could look like:

If you have a setup that is more complicated and needs further explanation, please post screenshots of your graphs and we can see where you might be hitting blockers or can make changes.

Hope this helps!