No scene/node appears on screen when added

[SquareAtom]

Godot Version

4.4.1

Question

Hi guys, I’m creating a ball, that has guns attached on it.
It’s a component system. The Grow Value is the base value, Grow Plus add 1 to Grow Value. MarkerManager will add a number of marker2D based on Grow Value, then GunManager attach Gun scene to it.

So far, MarkerManager and GunManager work well, they both add Marker2D and Gun to the scene, at least it printed out in Output.

But the actual guns are not appear in game. I can’t find it, I tried to scale it up, add a ray collision to find it easier, but it still missing. I don’t know where I got wrong.

The ball

The gun

Here is my code in Marker and Gun Manager:

func setup_marker():
	if body.has_node("GrowValue"):
		var marker_amount = body.get_node("GrowValue").value
	
		if body is Ball:
			var ball_radius = body.get_node("CollisionShape2D").shape.radius
			var angle_step = TAU / marker_amount
			for i in range(marker_amount):
				var marker = Marker2D.new()
				body.add_child(marker)
				var angle = i * angle_step
				marker.position = Vector2(cos(angle), sin(angle)) * ball_radius
				marker.rotation = angle
				marker_list.append(marker)
				print("Marker position: ",marker.position)
			print("Marker list: ", marker_list)

func setup_gun():
	if body.has_node("GrowValue") and body.has_node("MarkerManager"):
		var marker_list = body.get_node("MarkerManager").marker_list

		if body is Ball:
			for marker in marker_list:
				var gun = Gun.new()
				body.add_child(gun)
				gun.position = marker.position
				gun.rotation = marker.rotation
				gun.scale *= 2
				gun_list.append(gun)
				print("Gun position: ", gun.position)
			print("Gun list: ", gun_list)

Thank you for your time!

[gertkeno]

@SquareAtom

var gun = Gun.new()

Assuming you made a class_name Gun this will only create the Node2D + script for your gun, not the scene. You still need to load and instantiate the scene to create it’s children and defined properties.

[SquareAtom]

I actually fixed it by this way yesterday (the post is pending and I can’t close it earlier).
Your answer also explain to me how difference the instantiate and the new() work.

Thank you a lot.