Created base state machine and setup existing one as one for animated sprites with a kinematic body as a parent.

project.godot

@@ -34,6 +34,11 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://src/state_machine.gd"
 }, {
+"base": "StateMachine",
+"class": "StateMachineAnimatedActor",
+"language": "GDScript",
+"path": "res://src/state_machine_animated_actor.gd"
+}, {
 "base": "Node",
 "class": "StateModifier",
 "language": "GDScript",
@@ -45,6 +50,7 @@ _global_script_class_icons={
 "PushdownStateMachine": "",
 "State": "",
 "StateMachine": "",
+"StateMachineAnimatedActor": "",
 "StateModifier": ""
 }
 

src/playerC/Player-KinematicBody2D.gd

@@ -18,7 +18,7 @@ onready var player_hurtbox = $Hurtbox_Component/CollisionShape2D
 onready var gun = $Gun
 
 func _ready() -> void:
-	movement_state_machine.init(self, movement_animations, player_move_component)
+	movement_state_machine.init_animated_actor(self, movement_animations, player_move_component)
 	player_move_component.player_number = player_number
 
 func _unhandled_input(event: InputEvent) -> void:

src/playerC/Player.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=88 format=2]
+[gd_scene load_steps=89 format=2]
 
 [ext_resource path="res://src/playerC/Player-KinematicBody2D.gd" type="Script" id=1]
 [ext_resource path="res://src/playerC/states/idle.gd" type="Script" id=2]
@@ -13,6 +13,7 @@
 [ext_resource path="res://src/playerC/states/none.gd" type="Script" id=11]
 [ext_resource path="res://src/components/Hurtbox_Component.tscn" type="PackedScene" id=12]
 [ext_resource path="res://src/state_modifier.gd" type="Script" id=13]
+[ext_resource path="res://src/state_machine_animated_actor.gd" type="Script" id=14]
 
 [sub_resource type="StreamTexture" id=75]
 load_path = "res://.import/MegaMan.png-dc2c293e5a0f5d183ee961942ac90e4a.stex"
@@ -439,7 +440,7 @@ shape = SubResource( 74 )
 script = ExtResource( 6 )
 
 [node name="state_machine" type="Node" parent="Controllers"]
-script = ExtResource( 3 )
+script = ExtResource( 14 )
 starting_state = NodePath("idle")
 
 [node name="idle" type="Node" parent="Controllers/state_machine"]

src/state_machine.gd

@@ -7,13 +7,10 @@ var state_modifiers: Array
 
 # Initialize the state machine by giving each child state a reference to the
 # parent object it belongs to and enter the default starting_state.
-func init(parent: KinematicBody2D, animations: AnimatedSprite, move_component) -> void:
+func init() -> void:
 	for child in get_children():
 		if child is State:
-			print("Initializing State Node for ", parent.name, ": ", child.name)
-			child.parent = parent
-			child.animations = animations
-			child.move_component = move_component
+			print("Initializing State Node: ", child.name)
 			child.modifier_stack_ref = state_modifiers
 
 	# Initialize to the default state
@@ -44,19 +41,6 @@ func process_input(event: InputEvent) -> void:
 		change_state(new_state)
 
 func process_frame(delta: float) -> void:
-	# Check the state modifiers for timeouts, and maybe more conditions later
-	# If the modifier is no longer valid, pop it from the stack. 
-	# We could iterate through a whole list of states but I'm not sure i want
-	# states to be that complex. 
-	if state_modifiers.empty() == false:
-		if state_modifiers[-1].state_timeout.time_left == 0:
-			print("Pop State Modifier: ", state_modifiers[-1].name)
-			state_modifiers.pop_back()
-			# Reset animation suffix
-			current_state.animation_suffix = ''
-			var current_frame = current_state.animations.frame
-			current_state.animations.play(current_state.animation_sequence[current_state.animation_index])
-			current_state.animations.frame = current_frame;
 	var new_state = current_state.process_frame(delta)
 	if new_state:
 		change_state(new_state)

src/state_machine_animated_actor.gd

@@ -0,0 +1,34 @@
+class_name StateMachineAnimatedActor extends StateMachine
+
+# Initialize the state machine by giving each child state a reference to the
+# parent object it belongs to and enter the default starting_state.
+func init_animated_actor(parent: KinematicBody2D, animations: AnimatedSprite, move_component) -> void:
+	for child in get_children():
+		if child is State:
+			print("Initializing State Node for ", parent.name, ": ", child.name)
+			child.parent = parent
+			child.animations = animations
+			child.move_component = move_component
+			child.modifier_stack_ref = state_modifiers
+
+	# Initialize to the default state
+	change_state(get_node(starting_state))
+	
+
+func process_frame(delta: float) -> void:
+	# Check the state modifiers for timeouts, and maybe more conditions later
+	# If the modifier is no longer valid, pop it from the stack. 
+	# We could iterate through a whole list of states but I'm not sure i want
+	# states to be that complex. 
+	if state_modifiers.empty() == false:
+		if state_modifiers[-1].state_timeout.time_left == 0:
+			print("Pop State Modifier: ", state_modifiers[-1].name)
+			state_modifiers.pop_back()
+			# Reset animation suffix
+			current_state.animation_suffix = ''
+			var current_frame = current_state.animations.frame
+			current_state.animations.play(current_state.animation_sequence[current_state.animation_index])
+			current_state.animations.frame = current_frame;
+	var new_state = current_state.process_frame(delta)
+	if new_state:
+		change_state(new_state)