last init

scripts/enemy/enemy.gd

@@ -0,0 +1,38 @@
+extends CharacterBody3D
+
+enum State { IDLE, CHASE, ATTACK, RETURN }
+
+var state: int = State.IDLE
+var target: Node3D = null
+var spawn_position: Vector3
+var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
+
+@onready var health: Node = $Health
+
+func _ready() -> void:
+  spawn_position = global_position
+  add_to_group("enemies")
+  EventBus.entity_died.connect(_on_entity_died)
+
+func _on_entity_died(entity: Node) -> void:
+  if entity == self:
+    queue_free()
+  elif entity == target:
+    target = null
+    state = State.RETURN
+
+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":
+    target = body
+    state = State.CHASE
+    EventBus.enemy_engaged.emit(self, body)
+
+func _on_detection_area_body_exited(body: Node3D) -> void:
+  if body == target and state == State.CHASE:
+    state = State.RETURN
+    target = null

scripts/enemy/enemy.gd.uid

@@ -0,0 +1 @@
+uid://bwi75jx0agktd

scripts/enemy/enemy_combat.gd

@@ -0,0 +1,26 @@
+extends Node
+
+const ATTACK_RANGE := 2.0
+const ATTACK_COOLDOWN := 1.5
+const ATTACK_DAMAGE := 5.0
+
+var attack_timer := 0.0
+
+@onready var enemy: CharacterBody3D = get_parent()
+
+func _physics_process(delta: float) -> void:
+  attack_timer -= delta
+  if enemy.state != enemy.State.ATTACK:
+    return
+  if not is_instance_valid(enemy.target):
+    enemy.state = enemy.State.RETURN
+    return
+  var dist := enemy.global_position.distance_to(enemy.target.global_position)
+  if dist > ATTACK_RANGE:
+    enemy.state = enemy.State.CHASE
+    return
+  if attack_timer <= 0:
+    attack_timer = ATTACK_COOLDOWN
+    EventBus.damage_requested.emit(enemy, enemy.target, ATTACK_DAMAGE)
+  enemy.velocity.x = 0
+  enemy.velocity.z = 0

scripts/enemy/enemy_combat.gd.uid

@@ -0,0 +1 @@
+uid://ct4u62xalrjyo

scripts/enemy/enemy_healthbar.gd

@@ -0,0 +1,22 @@
+extends Sprite3D
+
+@onready var viewport: SubViewport = $SubViewport
+@onready var health_bar: ProgressBar = $SubViewport/HealthBar
+@onready var shield_bar: ProgressBar = $SubViewport/ShieldBar
+@onready var border: ColorRect = $SubViewport/Border
+@onready var health: Node = get_parent().get_node("Health")
+@onready var shield: Node = get_parent().get_node("Shield")
+
+func _ready() -> void:
+  texture = viewport.get_texture()
+  health_bar.max_value = health.max_health
+  shield_bar.max_value = shield.max_shield
+  border.visible = false
+  EventBus.target_changed.connect(_on_target_changed)
+
+func _process(_delta: float) -> void:
+  health_bar.value = health.current_health
+  shield_bar.value = shield.current_shield
+
+func _on_target_changed(_player: Node, target: Node) -> void:
+  border.visible = (target == get_parent())

scripts/enemy/enemy_healthbar.gd.uid

@@ -0,0 +1 @@
+uid://dwqx03nfypa7u

scripts/enemy/enemy_movement.gd

@@ -0,0 +1,52 @@
+extends Node
+
+const SPEED := 3.0
+const LEASH_RANGE := 15.0
+const ATTACK_RANGE := 2.0
+
+@onready var enemy: CharacterBody3D = get_parent()
+@onready var nav_agent: NavigationAgent3D = get_parent().get_node("NavigationAgent3D")
+
+func _physics_process(_delta: float) -> void:
+  match enemy.state:
+    enemy.State.IDLE:
+      enemy.velocity.x = 0
+      enemy.velocity.z = 0
+    enemy.State.CHASE:
+      _chase()
+    enemy.State.RETURN:
+      _return_to_spawn()
+
+func _chase() -> void:
+  if not is_instance_valid(enemy.target):
+    enemy.state = enemy.State.RETURN
+    return
+  var dist_to_spawn := enemy.global_position.distance_to(enemy.spawn_position)
+  if dist_to_spawn > LEASH_RANGE:
+    enemy.state = enemy.State.RETURN
+    enemy.target = null
+    return
+  var dist_to_target := enemy.global_position.distance_to(enemy.target.global_position)
+  if dist_to_target <= ATTACK_RANGE:
+    enemy.state = enemy.State.ATTACK
+    return
+  nav_agent.target_position = enemy.target.global_position
+  var next_pos := nav_agent.get_next_path_position()
+  var direction := (next_pos - enemy.global_position).normalized()
+  direction.y = 0
+  enemy.velocity.x = direction.x * SPEED
+  enemy.velocity.z = direction.z * SPEED
+
+func _return_to_spawn() -> void:
+  var dist := enemy.global_position.distance_to(enemy.spawn_position)
+  if dist < 1.0:
+    enemy.state = enemy.State.IDLE
+    enemy.velocity.x = 0
+    enemy.velocity.z = 0
+    return
+  nav_agent.target_position = enemy.spawn_position
+  var next_pos := nav_agent.get_next_path_position()
+  var direction := (next_pos - enemy.global_position).normalized()
+  direction.y = 0
+  enemy.velocity.x = direction.x * SPEED
+  enemy.velocity.z = direction.z * SPEED

scripts/enemy/enemy_movement.gd.uid

@@ -0,0 +1 @@
+uid://tnx6rbnnngn