What's the best way to interact with a custom class on collision?

Help
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1

Godot Version

4.3.stable.mono

Question

Very new to Godot here, so thanks in advance (adthanksvance)! I’m trying to interact with a game object that has a script on it, from within another script when the objects collide. I’ll give you all what I’m trying at the moment—hopefully that can at least demonstrate what I thought I could do. I have a Shirt:

public partial class Shirt : Area2D
{
	[Export]
	public String color { get; set; } = "white";
}

And I have a Player, which has the following method that is connected to the area_entered signal of an Area2D:

public partial class Player : RigidBody2D
{
// ...
	private void OnBodyEntered(Node2D body)
	{
		GD.Print("I ran into " + body.Name);
		if (body is Shirt shirt) {
			GD.Print("It's a " + shirt.color + " shirt");
		}
	}
// ...
}

When I debug this, I can see that the body is at least an Area2D, but the body is Shirt shirt part is not working as I had hoped. I’m pretty sure this is because I’m trying to derive a derived class (Shirt) from a base class (Area2D). My goal here is for the Player to be able to get the Shirts color when they collide. Is there a Godot-y way to achieve this?

2

Are you sure you’re using the correct signal? The function signal should be OnAreaEntered(Area2D area), the way your signal callback is write looks like you used body_entered instead.

1 Like
3

So far so good, as matheusmdx recommends. Assuming the collisions are configured correctly and the script (type) is on the Node2D that is passed to the handler.

4

Tried to test getting custom class myself and it feels like it’s broken…
I suggest to create dedicated variable in your class, just for checking if this is a “Shirt”.
Also you can use groups.