FSM and Orientation

character.gd

extends KinematicBody2D

enum ORIENTATION {
	UP,
	DOWN,
	LEFT,
	RIGHT
}

enum STATES {
	WALK,
	RUN,
	IDLE
}

var current_state = null
var orientation = DOWN

var input_direction = Vector2()
var last_direction = Vector2(1, 0)

const MAX_WALK_SPEED = 400
const MAX_RUN_SPEED = 700

var speed = 0.0
var max_speed = 0.0

var velocity = Vector2()

func change_direction(direction):
	if direction.y == -1:
		orientation = UP
	if direction.y == 1:
		orientation = DOWN
	if direction.x == 1:
		orientation = RIGHT
	if direction.x == -1:
		orientation = LEFT

	change_state(current_state)

func change_state(state):
	current_state = state
	match current_state:
		IDLE:
			match orientation:
				UP:
					$AnimationPlayer.play('idle up')
				DOWN:
					$AnimationPlayer.play('idle down')
				LEFT:
					$AnimationPlayer.play("idle left")
				RIGHT:
					$AnimationPlayer.play("idle right")
		WALK:
			match orientation:
				UP:
					$AnimationPlayer.play('walk up')
				DOWN:
					$AnimationPlayer.play('walk down')
				LEFT:
					$AnimationPlayer.play("walk left")
				RIGHT:
					$AnimationPlayer.play("walk right")
		RUN:
			match orientation:
				UP:
					$AnimationPlayer.play('walk up')
				DOWN:
					$AnimationPlayer.play('walk down')
				LEFT:
					$AnimationPlayer.play("walk left")
				RIGHT:
					$AnimationPlayer.play("walk right")

func _physics_process(delta):
	update_direction()
	move(delta)

func update_direction():
	if input_direction and last_direction != input_direction:
		last_direction = input_direction
		change_direction(input_direction)

func move(delta):
	if input_direction:
		if speed != max_speed:
			speed = max_speed
			change_state(WALK)
			$Label.text = "WALK"
	else:
		speed = 0
		change_state(IDLE)
		$Label.text = "IDLE"

	velocity = input_direction.normalized() * speed
	move_and_slide(velocity)