Emit signal and have a single instance act upon it instead of group

[dnezzarsevi]

Godot Version

v4.2

Question

Hi all. I have followd through the “Squash the Creeps” first 3D game tutorial and all works as expected. I figured I would ry to expand upon the game by adding a laser beam to the front of the player character and have this “squash the creeps” in addition to my jumping on them. I was able to make a beam that I toggle on and off with a trigger pull, and I used the below script in my Area3D node (child of player) to run the squash function when the beam body was entered:

func _on_body_entered(body):
	get_tree().call_group("mob", "squash")

The issue with this is that call group calls the function on all on-screen mobs, meaning that they all die instead of just the one hit. I understand that in the original code the jumping on the head of a mob killed only the one mob because of the collision.get_collider() identifying the single mob that was involved in the player collision. How do I either call squash on only the mob that the beam hit (and identify which one was hit) using a direct call or emit?

Below is the code showing the instantiation of the mobs:

func _on_mob_timer_timeout():
	# create a new instance of the mob scene
	var mob = mob_scene.instantiate()
	
	# Choose a random location on the SpawnPath
	# We store a reference to the SpawnLocaiton node
	var mob_spawn_location = get_node("SpawnPath/SpawnLocation")
	# And give it a random offset
	mob_spawn_location.progress_ratio = randf()
	
	var player_position = $Player.position
	mob.initialize(mob_spawn_location.position, player_position)
	
	# Spawn the mob by adding it to the main scene
	add_child(mob)
	
	# We connect the mob to the score lable to update the code upon squashing one.
	mob.squashed.connect($UserInterface/ScoreLabel._on_mob_squashed.bind())

[FreakyGoose]

That’s because you’re calling all the objects (enemies) in the mob group.

Call the “squash” function on the particular body that entered the beam instead.

func _on_body_entered(body):
	body.squash()