No collisions between player and rocks in SpaceRocks #29

[JohnLudlow]

(reraised from PacktPublishing/Godot-Game-Engine-Projects#29)

I'm following the SpaceRocks project but I'm having an issue with detecting Player / Rock collisions. This is almost certainly something I'm doing wrong, I'd just appreciate a pointer as to what that might be.

I've connected a signal to a C# (yes I'm using C#) method on Player.on_body_entered:

	public void OnBodyEntered(Node body)
	{
		Debug.WriteLine("collided with something!");
		if (body.IsInGroup("rocks") && body is Rock rock)
		{
			rock.Explode();
			Lives--;
			Explode();
		}
	}

The problem is this signal's method is never invoked. I've put a breakpoint at the start of this method and it's just never hit when the player ship and rock meet. I also never see the debug output.

My code for my current attempt

JohnLudlow / GodotTraining / SpackeRocks

Things I've already checked

• The player has contact monitor enabled:
  

• The player has a collision shape:
  

• The rocks have a collision shape
  

Thanks for the quick response and that's a good thing to check. If I remember correctly, the project in the book doesn't ask you to do anything specific with the collision layers.

• Everything (rocks and player) is on collision layer 1, mask 1

• Collisions between rocks and bullets (which are Area2D's) work fine (which also suggests the collision shape is correct)

• I've downloaded the sample project and compared property-by-property and can't see what I'm missing

• I've made a much simpler project to test collisions between RigidBody2D objects: JohnLudlow / GodotTraining / 2dColisionTester and collisions do trigger the signal.

Conclusion

So I'm pretty sure this is something obvious I'm missing but I can't see what so I'd really appreciate a pointer or two.