Why doesn't my collision detection between two Area2D objects in Godot 4 work?

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SUMMARY

The forum discussion addresses collision detection issues between two Area2D objects in Godot 4. The user is attempting to detect collisions between a circle and a floor but reports that no collision response occurs. Key insights include the importance of verifying the '_on_body_entered' event to ensure it is firing before implementing additional collision logic, such as using 'if body.is_in_group'. This highlights the necessity of understanding event handling in Godot 4 for effective collision detection.

PREREQUISITES
  • Familiarity with Godot 4's Area2D node functionality
  • Understanding of collision detection principles in game development
  • Knowledge of Godot scripting and signal handling
  • Experience with debugging techniques in Godot
NEXT STEPS
  • Learn how to implement and debug signals in Godot 4
  • Explore the Godot 4 documentation on Area2D and collision layers
  • Study tutorials on effective collision detection strategies in Godot
  • Investigate the use of groups in Godot for managing object interactions
USEFUL FOR

Game developers, particularly those using Godot 4, who are working on collision detection and event handling in 2D games.

Darkmisc
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TL;DR
I've followed steps from a tutorial on how to set up collision detection between two Area2D objects. It's not working and I can't figure out why.
Hi everyone

I'd like to detect collisions between a circle and a floor.

I have set them up as follows:

1684196663869.png

1684196709419.png
1684196621540.png


1684196743781.png
The script runs fine (it's just a circle falling towards the floor), but nothing happens when the two objects collide.

Does anyone know what I've done wrong?Thanks
 
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Darkmisc said:
Does anyone know what I've done wrong?
Yes, (1) following a tutorial blindly without thinking and (2) giving up before you have tried to find the problem.

Before you add the 'if body.is_in_group' code you should test to see if the '_on_body_entered' event is firing.
 

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