Detecting collision between Area2D while dragging

shatahn

Hi,

I have a watering can and a plant. Both are Area2D nodes and both have children Collision2D and Sprite node.

I've hooked the watering can up with a drag and drop script which is working. When I click and hold I can drag it around. I used a tween to return it to the starting position when the mouse button is released.

I want to trigger a method on the plant when I drag the watering can over the plan collision spot.

At the moment this is not working.

What am I missing?

TwistedTwigleg

Welcome to the forums @shatahn!

If both of the nodes are Area2D nodes, then you probably can use the on_area_enter and on_area_exited functions on the plant Area2D to detect if the watering can is hovering over it, assuming the hovering watering can has a working Area2D. Something like this should work (untested):

Watering can script:

extends Area2D

# needed to tell if the body colliding is a watering can
const OBJECT_ID = "watering can"

# other code as needed

Plant script:

extends Area2D

# other code as needed

func _ready():
	connect("area_entered", self, "on_area_entered")
	connect("area_exited", self, "on_area_exited")

func on_area_entered(other):
	if "OBJECT_ID" in other:
		if other.OBJECT_ID == "watering can":
			# do whatever needs to be triggered when the watering
			# can is on the plant here!
			pass

func on_area_exited(other):
	if "OBJECT_ID" in other:
		if other.OBJECT_ID == "watering can":
			# do whatever needs to be triggered when the watering
			# can is not on the plant here!
			pass

shatahn

Thanks! This helped a lot.

My mistake was to try to use the container that has the can and the plant to connect the signals.

I have a box container called GameWindowContainer that holds the pot and the plat.

I was running this in the script attached to the container:

	var potplant = $PotPlant
	var plant = potplant.get_node("Plant")	
	connect("area_entered", plant, "_on_Plant_watering_entered")

I know that plant was targetting the "right" node in the "PotPlant" scene because when I called queue_free () on it the plant disappeared.

When I moved the connect to the Plant node and changed it to self it works.

I'm guessing that the signal "area_entered" is on the local object (in my case this was the containing node) and the second argument is only used for the method to be called.

Thanks for all the help!