How to flip RigidBody2D with children(RigidBody2D)?

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1

Godot Version

4.3

Question

I have a truck in 2d environment. When the truck is achieved the end of the map i need to flip it. I have not symmetric sprite and additional things so i cant flip sprite. I need to flip all truck.

Hierarchy of the truck:

Truck(RigidBody2D)
    Sprite2D
    CollisionPolygon2D
    FirstWheelHolder(PinJoint2D)
        Wheel(RigidBody2D)
    SecondWheelHolder(PinJoint2D)
        Wheel(RigidBody2D)
    FirstLoadHolder(PinJoint2D)
        RigidBody2D
    SecondLoadHolder(PinJoint2D)
        RigidBody2D
    ThirdLoadHolder(PinJoint2D)
        RigidBody2D

Regards

2

This solution does not answer the question but partially solves the problem
I do not flip the truck but I move children
If i do something wrong please correct me

extends RigidBody2D
class_name Truck

@onready var sprite: Sprite2D = $Sprite2D
@onready var cp: CollisionPolygon2D = $CollisionPolygon2D
@onready var fwh: PinJoint2D = $FirstWheelHolder
@onready var swh: PinJoint2D = $SecondWheelHolder
@onready var flh: PinJoint2D = $FirstLoadHolder
@onready var slh: PinJoint2D = $SecondLoadHolder
@onready var tlh: PinJoint2D = $ThirdLoadHolder


func _set_bodies_mode(mode) -> void:
	PhysicsServer2D.body_set_mode(fwh.get_node("Wheel").get_rid(), mode)
	PhysicsServer2D.body_set_mode(swh.get_node("Wheel").get_rid(), mode)
	PhysicsServer2D.body_set_mode(flh.get_node("Wheel").get_rid(), mode)
	PhysicsServer2D.body_set_mode(slh.get_node("Wheel").get_rid(), mode)
	PhysicsServer2D.body_set_mode(tlh.get_node("Wheel").get_rid(), mode)
	PhysicsServer2D.body_set_mode(get_rid(), mode)

func _set_body_state(rid: RID, pos: Vector2) -> void:
	PhysicsServer2D.body_set_state(
		rid,
		PhysicsServer2D.BODY_STATE_TRANSFORM,
		Transform2D.IDENTITY.translated(pos)
	)

func move_pin_joint_with_rigid_body(pj: PinJoint2D, pos: Vector2) -> void:
	pj.node_b = ""
	pj.position = pos

	for child in pj.get_children():
		if child is RigidBody2D:
			_set_body_state(child.get_rid(), pj.global_position)
			child.position = Vector2.ZERO
			pj.node_b = child.get_path()

func flip() -> void:
	# stop physics
	_set_bodies_mode(PhysicsServer2D.BODY_MODE_KINEMATIC)
        
        # move pinjoints with child
	move_pin_joint_with_rigid_body(fwh, Vector2)
	move_pin_joint_with_rigid_body(swh, Vector2)
	move_pin_joint_with_rigid_body(flh, Vector2)
	move_pin_joint_with_rigid_body(slh, Vector2)
	move_pin_joint_with_rigid_body(tlh, Vector2)

        # flip sprite and collision polygon
	sprite.flip_h = last_direction == DIRECTION.RIGHT
	cp.scale.x *= -1

        # start physics again
	_set_bodies_mode(PhysicsServer2D.BODY_MODE_RIGID)