scenes

scripts/ai_controller.gd

@@ -0,0 +1,65 @@
+class_name AIController
+extends Node
+
+@export var standoff_distance := 30.0     # throttle down inside this
+@export var fire_range := 120.0           # open fire inside this
+@export var full_rudder_angle_deg := 20.0 # bearing error at which rudder saturates
+
+var _boat: Boat
+var _target: Boat  # node reference — shift-safe; never store a position
+
+
+func _ready() -> void:
+	_boat = get_parent() as Boat
+
+
+func _physics_process(_delta: float) -> void:
+	if _boat == null:
+		return
+	if _player_has_boat():
+		return  # player possessed us — write nothing, resume when they leave
+
+	if not is_instance_valid(_target):
+		_target = _pick_target()
+	if _target == null:
+		_boat.desired_throttle = 0.0
+		_boat.steer_input = 0.0
+		_boat.aim_point = null  # stow turrets, per the aim contract
+		_boat.fire_intents[0] = false
+		return
+
+	# All geometry computed fresh this tick — origin-shift safe.
+	var to_target: Vector3 = _target.global_position - _boat.global_position
+	to_target.y = 0.0
+	var distance := to_target.length()
+
+	var forward := -_boat.global_basis.z
+	forward.y = 0.0
+
+	var bearing_error := forward.signed_angle_to(to_target, Vector3.UP)
+	_boat.steer_input = clampf(
+		bearing_error / deg_to_rad(full_rudder_angle_deg), -1.0, 1.0)
+
+	_boat.desired_throttle = 1.0 if distance > standoff_distance else 0.2
+
+	_boat.aim_point = _target.global_position
+	_boat.fire_intents[0] = distance < fire_range
+
+
+func _player_has_boat() -> bool:
+	var pc := get_tree().get_first_node_in_group(&"player_controllers") as PlayerController
+	return pc != null and pc.current_controlled == _boat
+
+
+func _pick_target() -> Boat:
+	var best: Boat = null
+	var best_d := INF
+	for node in get_tree().get_nodes_in_group(&"boats"):
+		var other := node as Boat
+		if other == null or other == _boat:
+			continue
+		var d := _boat.global_position.distance_squared_to(other.global_position)
+		if d < best_d:
+			best_d = d
+			best = other
+	return best