add base system

core/ai/ai_base/ai_base.gd

@@ -0,0 +1,48 @@
+extends CharacterBody3D
+
+class_name AIBase
+
+@export var speed: float = 4.0
+@export var enable_state_machine: bool = true: 
+	set(value):
+		enable_state_machine = value
+		toggle_enable_state_machine()
+
+
+@onready var patrol_radius_shape: CollisionShape3D = $PatrolRadiusShape
+@onready var nav_agent: NavigationAgent3D = $NavigationAgent3D
+@onready var state_machine: StateMachine = $StateMachine
+
+
+func _ready() -> void:
+	randomize()
+	toggle_enable_state_machine()
+
+func toggle_enable_state_machine() -> void:
+	$StateMachine.enable = enable_state_machine
+
+func _physics_process(delta: float) -> void:
+	if !enable_state_machine:
+		return
+
+	state_machine.physics_process(delta)
+
+	if nav_agent.is_navigation_finished():
+		velocity = Vector3.ZERO
+		move_and_slide()
+		return
+
+	var next_point = nav_agent.get_next_path_position()
+	var direction = global_position.direction_to(next_point)
+	
+	velocity.x = direction.x * speed
+	velocity.z = direction.z * speed
+	
+	move_and_slide()
+
+func navigate_to_random_point() -> void:
+	var nav_map_rid = get_world_3d().get_navigation_map()
+	var patrol_radius = patrol_radius_shape.shape.radius
+	var target_point_in_space = global_position + Vector3(randf_range(-1, 1), 0, randf_range(-1, 1)).normalized() * randf_range(0, patrol_radius)
+	var closest_valid_point = NavigationServer3D.map_get_closest_point(nav_map_rid, target_point_in_space)
+	nav_agent.target_position = closest_valid_point

core/ai/ai_base/ai_base.gd.uid

@@ -0,0 +1 @@
+uid://b30p1yqojbbbk

core/ai/ai_base/ai_base.tscn

@@ -0,0 +1,41 @@
+[gd_scene format=3 uid="uid://clx701xdwelgx"]
+
+[ext_resource type="Script" uid="uid://b30p1yqojbbbk" path="res://core/ai/ai_base/ai_base.gd" id="1_4d1nn"]
+[ext_resource type="Script" uid="uid://ps3vlu2qvmop" path="res://core/ai/ai_base/state_machine.gd" id="2_q1hg3"]
+[ext_resource type="Script" uid="uid://nga8qx56iwgu" path="res://core/ai/ai_base/idle_state.gd" id="3_26faq"]
+[ext_resource type="Script" uid="uid://bngfthvt04ivv" path="res://core/ai/ai_base/patrol_state.gd" id="4_lim44"]
+
+[sub_resource type="CapsuleMesh" id="CapsuleMesh_mh3lg"]
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_mh3lg"]
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_lim44"]
+radius = 20.0
+
+[node name="AiBase" type="CharacterBody3D" unique_id=1228675528]
+script = ExtResource("1_4d1nn")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="." unique_id=214482161]
+mesh = SubResource("CapsuleMesh_mh3lg")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="." unique_id=92811823]
+shape = SubResource("CapsuleShape3D_mh3lg")
+
+[node name="NavigationAgent3D" type="NavigationAgent3D" parent="." unique_id=1370024449]
+
+[node name="StateMachine" type="Node" parent="." unique_id=1286404264 node_paths=PackedStringArray("initial_state")]
+script = ExtResource("2_q1hg3")
+initial_state = NodePath("IdleState")
+
+[node name="IdleState" type="Node" parent="StateMachine" unique_id=763668255]
+script = ExtResource("3_26faq")
+state_id = "idle"
+
+[node name="PatrolState" type="Node" parent="StateMachine" unique_id=2054606629]
+script = ExtResource("4_lim44")
+state_id = "patrol"
+
+[node name="PatrolRadiusShape" type="CollisionShape3D" parent="." unique_id=1379515938]
+shape = SubResource("SphereShape3D_lim44")
+disabled = true
+debug_color = Color(1, 1, 0, 1)

core/ai/ai_base/idle_state.gd

@@ -0,0 +1,24 @@
+extends State
+
+@export var wait_time: float = 3.0
+
+var runtime_timer: Timer
+
+func enter() -> void:
+	runtime_timer = Timer.new()
+	runtime_timer.name = "IdleTimer"
+	add_child(runtime_timer)
+	runtime_timer.one_shot = true
+	runtime_timer.timeout.connect(_on_timer_timeout)
+	runtime_timer.start(wait_time)
+
+func exit() -> void:
+	if runtime_timer:
+		if runtime_timer.is_connected("timeout", _on_timer_timeout):
+			runtime_timer.timeout.disconnect(_on_timer_timeout)
+		
+		runtime_timer.queue_free()
+		runtime_timer = null
+
+func _on_timer_timeout() -> void:
+	transitioned.emit(self, "patrol")

core/ai/ai_base/idle_state.gd.uid

@@ -0,0 +1 @@
+uid://nga8qx56iwgu

core/ai/ai_base/patrol_state.gd

@@ -0,0 +1,10 @@
+extends State
+
+@onready var agent: AIBase = owner
+
+func enter() -> void:
+	agent.navigate_to_random_point()
+
+func update(_delta)  -> void:
+	if agent.nav_agent.is_navigation_finished():
+		transitioned.emit(self, "idle")

core/ai/ai_base/patrol_state.gd.uid

@@ -0,0 +1 @@
+uid://bngfthvt04ivv

core/ai/ai_base/state.gd

@@ -0,0 +1,19 @@
+extends Node
+
+class_name State
+
+@export var state_id: String = ""
+
+signal transitioned(state, new_state_name)
+
+func enter()  -> void:
+	pass
+
+func exit()  -> void:
+	pass
+
+func update(_delta)  -> void:
+	pass
+
+func physics_update(_delta)  -> void:
+	pass

core/ai/ai_base/state.gd.uid

@@ -0,0 +1 @@
+uid://dpso7abi5ftyw

core/ai/ai_base/state_machine.gd

@@ -0,0 +1,48 @@
+extends Node
+
+class_name StateMachine
+
+@export var initial_state: State
+
+var current_state: State
+var states: Dictionary = {}
+var enable: bool = true:
+	set(value):
+		enable = value
+		toggle_enable()
+
+func toggle_enable() -> void:
+	if !enable:
+		return
+	
+	if !states.is_empty():
+		return
+
+	for state in get_children():
+		if state is State:
+			states[state.state_id] = state
+			state.transitioned.connect(_on_state_transition)
+	
+	if initial_state:
+		current_state = initial_state
+		current_state.enter()
+
+func physics_process(delta) -> void:
+	if current_state and enable:
+		current_state.update(delta)
+
+func _on_state_transition(state: State, new_state_id: String) -> void:
+	if state != current_state:
+		return
+
+	var new_state = states.get(new_state_id)
+	if not new_state:
+		return
+
+	if current_state:
+		current_state.exit()
+	
+	current_state = new_state
+	current_state.enter()
+	
+	print("Transizione a: ", current_state.state_id)

core/ai/ai_base/state_machine.gd.uid

@@ -0,0 +1 @@
+uid://ps3vlu2qvmop