59 lines
2.0 KiB
GDScript
59 lines
2.0 KiB
GDScript
extends Node
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const SPEED := 3.0
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const ATTACK_RANGE := 2.0
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const REGEN_FAST := 0.10
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const REGEN_SLOW := 0.01
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@onready var enemy: CharacterBody3D = get_parent()
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@onready var nav_agent: NavigationAgent3D = get_parent().get_node("NavigationAgent3D")
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func _physics_process(delta: float) -> void:
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match enemy.state:
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enemy.State.IDLE:
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enemy.velocity.x = 0
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enemy.velocity.z = 0
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enemy.State.CHASE:
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_chase()
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enemy.State.RETURN:
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_return_to_spawn(delta)
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func _chase() -> void:
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if not is_instance_valid(enemy.target):
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enemy.state = enemy.State.RETURN
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return
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var dist_to_target := enemy.global_position.distance_to(enemy.target.global_position)
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if dist_to_target <= ATTACK_RANGE:
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enemy.state = enemy.State.ATTACK
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return
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nav_agent.target_position = enemy.target.global_position
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var next_pos := nav_agent.get_next_path_position()
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var direction := (next_pos - enemy.global_position).normalized()
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direction.y = 0
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enemy.velocity.x = direction.x * SPEED
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enemy.velocity.z = direction.z * SPEED
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func _return_to_spawn(delta: float) -> void:
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var dist := enemy.global_position.distance_to(enemy.spawn_position)
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if dist < 1.0:
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enemy.state = enemy.State.IDLE
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enemy.velocity.x = 0
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enemy.velocity.z = 0
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return
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nav_agent.target_position = enemy.spawn_position
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var next_pos := nav_agent.get_next_path_position()
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var direction := (next_pos - enemy.global_position).normalized()
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direction.y = 0
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enemy.velocity.x = direction.x * SPEED
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enemy.velocity.z = direction.z * SPEED
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_regenerate(delta)
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func _regenerate(delta: float) -> void:
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var health: Node = enemy.get_node("Health")
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if health.current_health < health.max_health:
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var rate: float = REGEN_FAST if health.current_health < health.max_health else REGEN_SLOW
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if health.current_health >= health.max_health * 0.99:
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rate = REGEN_SLOW
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health.current_health = min(health.current_health + health.max_health * rate * delta, health.max_health)
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EventBus.health_changed.emit(enemy, health.current_health, health.max_health)
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