update

enemy/enemy.gd

@@ -0,0 +1,36 @@
+extends CharacterBody3D
+
+enum State { IDLE, CHASE, ATTACK, RETURN }
+
+@export var stats: BaseStats
+
+var state: int = State.IDLE
+var target: Node3D = null
+var spawn_position: Vector3
+var portal: Node3D = null
+var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
+
+func _ready() -> void:
+  spawn_position = global_position
+  add_to_group("enemies")
+  Stats.register(self, stats)
+  EventBus.entity_died.connect(_on_entity_died)
+
+func _exit_tree() -> void:
+  Stats.deregister(self)
+
+func _on_entity_died(entity: Node) -> void:
+  if entity == self:
+    queue_free()
+
+func _physics_process(delta: float) -> void:
+  if not is_on_floor():
+    velocity.y -= gravity * delta
+  move_and_slide()
+
+func _on_detection_area_body_entered(body: Node3D) -> void:
+  if body is CharacterBody3D and body.name == "Player":
+    EventBus.enemy_detected.emit(self, body)
+
+func _on_detection_area_body_exited(_body: Node3D) -> void:
+  pass