Player State Machine #5

New Issue

OddlyTimbot · 2026-05-04T21:07:41Z

OddlyTimbot commented

2026-05-04 21:07:41 +00:00

Add a finite state machine to track the player states and trigger animations.

Create an enumerator that will list all the possible states.

enum State{IDLE,JUMP,FALLING,RUNNING}
var current_state:State = State.IDLE

Make a variable to know when the player is jumping up, or has reached the apex of a jump and is falling.

jumpUp:bool = false

Add two new functions:

handle_state and handle_animation

Update the physics process to include these functions in the player loop.

func _physics_process(delta):
	# Get the input direction and handle the movement/deceleration.
	# As good practice, you should replace UI actions with custom gameplay actions.
	if current_state != State.HURT:
		handle_input()
	handle_movement(delta)
	update_states()
	update_animation()
	move_and_slide()
	handle_collisions()

In the handle_input function, detect a jump request and set the jumpUp variable to true:

if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = JUMP_VELOCITY
		current_player_state = PlayerState.JUMPING
		jumpUp = true

Code for handling State:

func handle_state()->void:
	match current_player_state:
		PlayerState.IDLE when velocity.x !=0:
			#change to running!!
			current_player_state = PlayerState.RUNNING
		PlayerState.RUNNING when velocity.x == 0:
			current_player_state = PlayerState.IDLE
		PlayerState.JUMPING when velocity.y > 0:
			current_player_state = PlayerState.FALLING
		PlayerState.FALLING when is_on_floor():
			if velocity.x ==0:
				current_player_state = PlayerState.IDLE
			else:
				current_player_state = PlayerState.RUNNING

Code to handle animation:

func handle_animation()->void:
	match current_player_state:
		PlayerState.IDLE:
			player_graphic.play("idle")	
		PlayerState.RUNNING:
			player_graphic.play("running")
		PlayerState.JUMPING:
			if jumpUp:
				player_graphic.play("jumping")
		PlayerState.FALLING:
			player_graphic.play("falling")

We need to know when the jump animation has finished so we can set jumpUp to false:

func _on_animation_finished() -> void:
	match current_player_state:
		PlayerState.JUMPING:
			jumpUp = false

Add a finite state machine to track the player states and trigger animations. Create an enumerator that will list all the possible states. ``` enum State{IDLE,JUMP,FALLING,RUNNING} var current_state:State = State.IDLE ``` Make a variable to know when the player is jumping up, or has reached the apex of a jump and is falling. `jumpUp:bool = false` Add two new functions: `handle_state` and `handle_animation` Update the physics process to include these functions in the player loop. ``` func _physics_process(delta): # Get the input direction and handle the movement/deceleration. # As good practice, you should replace UI actions with custom gameplay actions. if current_state != State.HURT: handle_input() handle_movement(delta) update_states() update_animation() move_and_slide() handle_collisions() ``` In the handle_input function, detect a jump request and set the jumpUp variable to true: ``` if Input.is_action_just_pressed("ui_accept") and is_on_floor(): velocity.y = JUMP_VELOCITY current_player_state = PlayerState.JUMPING jumpUp = true ``` Code for handling State: ``` func handle_state()->void: match current_player_state: PlayerState.IDLE when velocity.x !=0: #change to running!! current_player_state = PlayerState.RUNNING PlayerState.RUNNING when velocity.x == 0: current_player_state = PlayerState.IDLE PlayerState.JUMPING when velocity.y > 0: current_player_state = PlayerState.FALLING PlayerState.FALLING when is_on_floor(): if velocity.x ==0: current_player_state = PlayerState.IDLE else: current_player_state = PlayerState.RUNNING ``` Code to handle animation: ``` func handle_animation()->void: match current_player_state: PlayerState.IDLE: player_graphic.play("idle") PlayerState.RUNNING: player_graphic.play("running") PlayerState.JUMPING: if jumpUp: player_graphic.play("jumping") PlayerState.FALLING: player_graphic.play("falling") ``` We need to know when the jump animation has finished so we can set jumpUp to false: ``` func _on_animation_finished() -> void: match current_player_state: PlayerState.JUMPING: jumpUp = false ```

OddlyTimbot added the

enhancement

label 2026-05-04 21:35:50 +00:00

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