Can a CharacterBody2D interact with a RigitBody2D ?

astro785

Hi there!
I'm doing some tests to practice on platformers, and I'm stuck on something: I have a very simple scene with a Tilemap and its physic layer, a player which is a CharacterBody2D, and a box which is a RigidBody2D.

All I want to do is push this box with my player.

The player and the box are correctly positioned on the floor of the Tilemap, and when I instantiate several boxes a few centimetres from the floor, and they fall, I can see that they collide with each other. If I place my player underneath the falling boxes, it's pushed back by the boxes.

Sometimes when the boxes are tangled, and I jump on them with my player a few times, they move and reposition themselves correctly.

But when the boxes are on the ground and I move towards them, nothing happens (the player is blocked by the box, but the box doesn't move forward).

I move the Player with move_and_slide(), and its motion mode is "Grounded".

The box has no script attached, it's just a RigidBody2D with a sprite and a CollisionShape2D.

I've tried fiddling with the RigidBody2D parameters, but nothing works.

Could you help? Thanks in advance!

DaveTheCoder

astro785 I move the Player with move_and_slide(),

What happens if you move the Player with move_and_collide(), or by explicitly changing its position?

davek

astro785

It might be obvious to you what you want to happen, but not to Godot...

That's what "slide collisions" are for.

One way to solve this, is in your physics process, something like this:

for index in get_slide_collision_count():
    var collision: KinematicCollision2D = get_slide_collision(index)
    var collision_collider = collision.get_collider()
    if collision_collider is RigidBody2D:
        var push_direction = -collision.get_normal()
        collider.apply_central_impulse(push_direction * push_force)

astro785

Video to give a better understanding :

astro785

DaveTheCoder I don't really know how to use move_and_collide, when I tried to replace move_and_slide() with move_and_collide(velocity * delta), my player is frozen and i'm unable to move it with arrow keys.

My player script :

extends CharacterBody2D

@export var SPEED = 300.0
@export var JUMP_VELOCITY = -400.0
@export var spawn_point : SpawnPoint

@onready var visuals : AnimatedSprite2D = $Visuals
@onready var animation_player : AnimationPlayer = $AnimationPlayer

# Get the gravity from the project settings to be synced with RigidBody nodes.
var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")



func _ready():
	spawn_point.spawn_player()

func _physics_process(delta):
	var is_jumping = false
	
	# Handle Jump.
	if Input.is_action_just_pressed("jump") and is_on_floor():
		velocity.y = JUMP_VELOCITY
		
		is_jumping = true
	
	# Add the gravity.
	if not is_on_floor():
		velocity.y += gravity * delta
		
		# Playing fall animation when the player is in the air and not jumping.
		if velocity.y > 0 and not is_jumping:
			play_animation("fall")
		elif velocity.y < 0:
			play_animation("jump")
	
	# Get the input direction and handle the movement/deceleration.
	# As good practice, you should replace UI actions with custom gameplay actions.
	var direction = Input.get_axis("move_left", "move_right")
	if direction:
		velocity.x = direction * SPEED
		
		# Play run animation when moving horizontally.
		if is_on_floor() and not is_jumping:
			play_animation("run")
		
		# Flip visuals horizontally according to the direction.
		visuals.flip_h = clamp(-velocity.x, 0, 1)
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		
		# Play idle animation when not moving and on the floor.
		if is_on_floor() and not is_jumping:
			play_animation("idle")
	
	
	# Move the character.
	move_and_collide(velocity * delta)


func play_animation(animation_name:String):
	if animation_player != null:
		animation_player.play(animation_name)


func animation_finished():
	await animation_player.animation_finished


func set_spawn_point(new_spawn_point:SpawnPoint):
	self.spawn_point = new_spawn_point