How can I Synchronize values between another scene?

[cdcyoza]

Hi! I’m making a health system!
And I need your help!

The part that I need help with is delivering the value of hp to another scene (of course Including the scene that was changed during the game!)

Because I devided the game into battle scene and main scene

So I need to share hp value between battle scene and main scene

I would say How can I synchronize values between another scene?

How can I do this?

Could you help me?

PS. I’m not native English speaker and if my English was bad I’m sorry about this…

[choirmaestro]

There are several ways you could do this, though which is best depends on your needs. I would, personally, add the player health to a resource and set it as a singleton. It would look something like this:

~~GlobalVariables.gd~~
static var player_health: int = 100

~~MainScene.gd~~
var player_hp: int = GlobalVariables.player_health

And then doing the same thing in your BattleScene.gd. As long as you reference the GlobalVariables list with any/all changes you make, it should update correctly. Just note that, once the value is updated, you have to manually change it back again (if adding/removing more health or restarting the scene upon death).

[cdcyoza]

Is there any way to do it perfectly automatically?
(Thank you so much for your help!)

[choirmaestro]

There is, somewhat. When you have singletons/autoloads, they can also call functions. So, if you want to say, subtract 10 health from the player_health in GlobalVariables, you could do:

~~GlobalVariables.gd~~
static var player_health: int = 100

static func change_health(value: int) -> void:
	player_health += value     

Where (value) is passed to it from the other scenes:

~~MainScene.gd~~
var player_hp: int = GlobalVariables.player_health

func make_player_hurt() -> void:
        GlobalVariables.change_health(-10) #-1 here is passed to the GlobalVariables function and replaces 'value' with '-10'

[cdcyoza]

What a good idea!! Thank you so much!! and thank you again!!