create AntNitwit class and make them wander

scripts/units/ant_nitwit.gd

@@ -0,0 +1,38 @@
+extends ControlledUnit
+class_name AntNitwit
+
+enum AntNitwitState {
+	WANDERING,
+	MOVING,
+}
+
+var state: AntNitwitState = AntNitwitState.WANDERING
+
+
+func _ready() -> void:
+	super._ready()
+	moving_started.connect(_on_moving_started)
+	moving_ended.connect(_on_moving_ended)
+
+
+func _process(delta: float) -> void:
+	super._process(delta)
+	if moving_to_target:
+		state = AntNitwitState.MOVING
+
+	_handle_wandering(delta)
+
+
+func _handle_wandering(delta: float) -> void:
+	if state != AntNitwitState.WANDERING:
+		return
+	
+	_wander(delta)
+
+
+func _on_moving_ended() -> void:
+	state = AntNitwitState.WANDERING
+
+
+func _on_moving_started() -> void:
+	state = AntNitwitState.MOVING

scripts/units/controlled_unit.gd

@@ -1,13 +1,23 @@
 extends Unit
 class_name ControlledUnit
 
+signal moving_started
+signal moving_ended
+
 var selected: bool = false
+var moving_to_target: bool = false
 var ground_plane: Plane = Plane(Vector3.UP, 0)
 
 @onready var camera: Camera3D = get_viewport().get_camera_3d()
 @onready var selection_sprite: Sprite3D = $SelectionSprite
 
 
+func _init() -> void:
+	max_wander_distance = 2
+	min_wander_interval = 0.5
+	max_wander_interval = 30
+
+
 func _ready() -> void:
 	assert(camera != null, "camera missing!")
 	assert(selection_sprite != null, "selection_sprite missing!")
@@ -16,6 +26,13 @@ func _ready() -> void:
 	super._ready()
 
 
+func _physics_process(delta: float) -> void:
+	super._physics_process(delta)
+	if moving_to_target and nav_agent.is_navigation_finished():
+		moving_to_target = false
+		moving_ended.emit()
+
+
 func _input(event: InputEvent) -> void:
 	if not is_on_screen:
 		return
@@ -26,6 +43,8 @@ func _input(event: InputEvent) -> void:
 				button_event.button_index == MOUSE_BUTTON_RIGHT
 				and button_event.pressed
 		):
+			moving_to_target = true
+			moving_started.emit()
 			_set_target_click(button_event.position)
 
 

scripts/units/unit.gd

@@ -4,9 +4,9 @@ class_name Unit
 const MOVE_SPEED: float = 3
 const TURN_SPEED: float = 10
 
-const MAX_WANDER_DISTANCE: float = 5
-const MIN_WANDER_INTERVAL: float = 0.25
-const MAX_WANDER_INTERVAL: float = 5
+var max_wander_distance: float = 5
+var min_wander_interval: float = 0.25
+var max_wander_interval: float = 5
 
 var hovered: bool = false
 var is_on_screen: bool = false
@@ -94,13 +94,13 @@ func _wander(delta: float) -> void:
 	wandering_timer -= delta
 	if wandering_timer <= 0:
 		var new_pos_offset := Vector3(
-				randf_range(-MAX_WANDER_DISTANCE, MAX_WANDER_DISTANCE),
+				randf_range(-max_wander_distance, max_wander_distance),
 				0,
-				randf_range(-MAX_WANDER_DISTANCE, MAX_WANDER_DISTANCE),
+				randf_range(-max_wander_distance, max_wander_distance),
 		)
 		var new_pos := wandering_center + new_pos_offset
 		nav_agent.set_target_position(new_pos)
-		wandering_timer = randf_range(-MIN_WANDER_INTERVAL, MAX_WANDER_INTERVAL)
+		wandering_timer = randf_range(-min_wander_interval, max_wander_interval)
 
 
 func _on_nav_agent_velocity_computed(safe_velocity: Vector3) -> void: