Unique resources for each instance?

Goatfacekilla

Hey folks, pretty new to Godot but steadily gaining confidence. I've run into a minor but annoying issue that I've been trying to fix for hours now and thought I'd fall on the mercy of the community.

I'm working on a 2D top-down game. I've given the player glowing footprints in a certain section by instancing footprint scenes on the player's location. It works fine except I want to use Tweens to make the footprints fade away. I have a Tween for the footprint sprite to tween the modulate alpha and a tween for the Light2D to fade out the energy of the light. The light tween seems to be working properly, but the modulate tween to fade out the sprite texture... Well, it fades out when the player's not moving but when the player moves (and instances more footprints), the faded footprints reappear and restart the tween. I think the issue is that the instances all share the same resource, so the Tween is starting over with the same resource each time a new footprint's _ready() function is called. I've read that the solution is to make each instance's resource unique using duplicate(), but I'm not sure how to reference the correct resource to do this. Any help would be greatly appreciated!

dotted

I'd suggest either using constant in the script or using a singleton class pattern to contain a template instance.

Goatfacekilla

@dotted could you explain what you mean by using a constant? Here's my _ready function for each footprint.

func _ready():
	var tweensprite = $TweenSprite
	tweensprite.interpolate_property(get_parent(), "modulate", Color(1,1,1,1), Color(1,1,1,0), 3.0,Tween.TRANS_LINEAR,Tween.EASE_IN)
	tweensprite.start()
	var tweenlight = $TweenLight
	var light = tweenlight.get_parent().get_node("Light2D")
	tweenlight.interpolate_property(light, "energy", 1.0, 0.0, 5.0, Tween.TRANS_LINEAR, Tween.EASE_IN)
	tweenlight.start()

Megalomaniak

A constant value is defined similarly to a variable however the assigned value is unchangeable.

dotted

instead of

var something:PackedScene

use something like

const __template__:PackedScene = preload(your-resource-path)

var tween_thing

in _ready(), call

 	if tween_thing == null: tween_thing = __template__.instance()
     # do other stuff