Player with raycast

extends KinematicBody2D

#var global
var dialog
var collider

export var walk = 200
export var run  = 300

var old_motion = Vector2()
var anim = "down_idle"
var timelapse = 0


func process_movement(delta):
    var motion = Vector2(0,0)

    if Input.is_action_pressed("move_up"):
        motion += Vector2(0, -1)

    if Input.is_action_pressed("move_down"):
        motion += Vector2(0, 1)

    if Input.is_action_pressed("move_left"):
        motion += Vector2(-1, 0)

    if Input.is_action_pressed("move_right"):
        motion += Vector2(1, 0)

    if Input.is_action_pressed("ui_cancel"):
        get_tree().change_scene("scenes/menu.scn")

    var velocity = walk
    if Input.is_action_pressed("run_mod"):
        velocity = run

    motion = motion.normalized() * velocity * delta

    move(motion)

    timelapse += delta

    if get_node("RayCast2D").is_colliding() and Input.is_action_pressed("action"):
        var collider = get_node("RayCast2D").get_collider()
        send_to_dialog()

    # animation changes
    if (old_motion == motion):
        return

    old_motion = motion
    if(motion == Vector2(0,0)):
        anim += ("_idle")
    elif(motion.x < 0):
        anim = "left"
        get_node("RayCast2D").set_rot(3*PI/2)
    elif(motion.x > 0):
        anim = "right"
        get_node("RayCast2D").set_rot((PI)/2)
    elif(motion.y < 0):
        anim = "up"
        get_node("RayCast2D").set_rot(PI)
    elif(motion.y > 0):
        anim = "down"
        get_node("RayCast2D").set_rot(0)

    get_node("walk-anim").play(anim)




func _ready():
    set_fixed_process(true)
    get_node("RayCast2D").add_exception(self)

func _fixed_process(delta):
    process_movement(delta)

func send_to_dialog():
    var dialog_send = get_tree().get_root().get_node("dialog-box")  # Attempt to call function 'recieve_text' in base 'null instance' on a null instance.

    dialog_send.receive_text(str(collider)) # naturally does not execute see above comment

    print (collider, str(timelapse))