Added AbstractState and StateMachine

game/state_machine/abstract_state.gd

@@ -0,0 +1,24 @@
+class_name AbstractState
+extends Node
+
+
+@warning_ignore("unused_signal")
+signal new_state(state: AbstractState)
+
+
+func enter() -> void:
+	pass
+
+
+func exit() -> void:
+	pass
+
+
+@warning_ignore("unused_parameter")
+func process(delta: float) -> void:
+	pass
+
+
+@warning_ignore("unused_parameter")
+func physics_process(delta: float) -> void:
+	pass

game/state_machine/abstract_state.gd.uid

@@ -0,0 +1 @@
+uid://ciuxe344aok4n

game/state_machine/abstract_state.tscn

@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://c7adrbfobmvl8"]
+
+[ext_resource type="Script" uid="uid://ciuxe344aok4n" path="res://game/state_machine/abstract_state.gd" id="1_80326"]
+
+[node name="AbstractState" type="Node" unique_id=739226464]
+script = ExtResource("1_80326")

game/state_machine/state_machine.gd

@@ -0,0 +1,22 @@
+class_name StateMachine
+extends Node
+
+
+var current_state : AbstractState
+
+
+func _process(delta: float) -> void:
+	if current_state:
+		current_state.process(delta)
+
+
+func _physics_process(delta: float) -> void:
+	if current_state:
+		current_state.physics_process(delta)
+
+
+func change_state(new_state: AbstractState) -> void:
+	if current_state:
+		current_state.exit()
+	current_state = new_state
+	current_state.enter()

game/state_machine/state_machine.gd.uid

@@ -0,0 +1 @@
+uid://bghuevstlp4yp

game/state_machine/state_machine.tscn

@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://3ll3i1fgktg2"]
+
+[ext_resource type="Script" uid="uid://bghuevstlp4yp" path="res://game/state_machine/state_machine.gd" id="1_ncw1q"]
+
+[node name="StateMachine" type="Node" unique_id=633169960]
+script = ExtResource("1_ncw1q")