How to make CharacterBody2D bounce off other CharacterBody2Ds?

[wat]

How would I make a CharacterBody2D bounce of another CharacterBody2D? Right now I have it bounce using position. Whenever a CharacterBody2D touches another CharacterBody2D its speed goes negative giving it a “bouncing” effect but it’s quite linear so it looks very robotic. How can I utilize physics to make them bounce off each other? (Code below)

[gertkeno]

Make sure to paste scripts instead of screen shots.

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Posting here so to be linked for later use instead of re-typing this every time Make sure you paste scripts instead of screenshots. To properly format pasted code use three ticks ``` at the start and end of your paste like so: ``` # type or paste code here func _ready() -> void:     print("My ready function!") ``` Results in: # type or paste code here func _ready() -> void: print("My ready function!") Press the </> button or ctrl+e in the forum to create these ticks. [2024-09-02…

Character bodies should make use of their velocity propertiy with either move_and_collide or move_and_slide. In your case I suppose move_and_collide would be better.

First, do not edit position directly. calculate your movement vector then apply it.

func _physics_process(delta: float) -> void:
	var move_vector: Vector2 = position.direction_to(player.position) * speed
	var collision = move_and_collide(move_vector * delta)

	if collision:
		pass # do a bounce?!

Now using velocity you can modify it over time to result in more fluid movement

extends CharacterBody2D

const ACCELERATION = 12 # speed * 4
@export var player: CharacterBody2D

func _physics_process(delta: float) -> void:
	var move_vector: Vector2 = position.direction_to(player.position) * speed
	velocity = velocity.move_toward(move_vector, ACCELERATION * delta)
	var collision := move_and_collide(velocity * delta)

	if collision:
		velocity *= -1 # negative flip bounce
		velocity = velocity.bounce(collision.get_normal()) # normal-based bounce

[wat]

@export var player: CharacterBody2D

causes an error Invalid access to property or key 'position' on a base object of type 'Nil'. When I replace it with get_parent().get_node("player") no errors occur but there is no bounce on collision. The collision detection if statement does work though.

[gertkeno]

Did you copy and paste my sample or did you pick one of the two bounce lines? @export variables need to be assigned; you already had player defined, but I would recommend making it a class variable instead of a local one, so Godot isn’t searching for the parent/player every frame.

[wat]

I’ve assigned the export variable and I’ve tried both bounce methods and it still does not bounce

extends CharacterBody2D
var speed = 100
var ACCELERATION = 12
@export var player: CharacterBody2D

@onready var timer = $Timer
func _physics_process(delta: float) -> void:
	
	var move_vector: Vector2 = position.direction_to(player.position) * speed
	velocity = velocity.move_toward(move_vector, ACCELERATION * delta)
	var collision := move_and_collide(move_vector * delta)

	if collision:
		velocity *= -1

[gertkeno]

Ah silly me, the sample was not using velocity in move_and_collide. you may need to increase the acceleration to 400, I like 4 times speed as a good base.

var collision := move_and_collide(velocity * delta)

[wat]

thank you