feat: 添加spawner生成器，生成敌人

scenes/arena/arena.tscn

@@ -16,6 +16,9 @@
 [ext_resource type="PackedScene" uid="uid://ifmw1e7gycc8" path="res://scenes/ui/health_bar/health_bar.tscn" id="14_dh340"]
 [ext_resource type="Script" uid="uid://y47blv3332q8" path="res://scenes/unit/enemy/shooting_behavior.gd" id="15_l0cts"]
 [ext_resource type="PackedScene" uid="uid://bmhud2e0x287r" path="res://scenes/projectiles/projectile_enemy.tscn" id="16_ybinm"]
+[ext_resource type="Script" uid="uid://bd5bscq0u8wld" path="res://scenes/arena/spawner.gd" id="17_rhjlh"]
+[ext_resource type="Script" uid="uid://dqhoumuppl4bx" path="res://resources/waves/wave_data.gd" id="18_8kk48"]
+[ext_resource type="Resource" uid="uid://cer6rdmxrnenh" path="res://resources/waves/data/wave_1_to_5.tres" id="18_tp84n"]
 
 [sub_resource type="CircleShape2D" id="CircleShape2D_e15k4"]
 radius = 4.0
@@ -355,7 +358,16 @@ enemy = NodePath("..")
 fire_pos = NodePath("../Visuals/FirePos")
 projectile_scene = ExtResource("16_ybinm")
 
+[node name="Spawner" type="Node2D" parent="." unique_id=831614176]
+script = ExtResource("17_rhjlh")
+waves_data = Array[ExtResource("18_8kk48")]([ExtResource("18_tp84n")])
+
+[node name="SpawnTimer" type="Timer" parent="Spawner" unique_id=1696770444]
+
+[node name="WaveTimer" type="Timer" parent="Spawner" unique_id=2083072683]
+
 [connection signal="on_damaged" from="EnemyShooter/HurtboxComponent" to="EnemyShooter" method="_on_hurtbox_component_on_damaged"]
 [connection signal="on_health_changed" from="EnemyShooter/HealthComponent" to="EnemyShooter/HealthBar" method="_on_health_component_on_health_changed"]
 [connection signal="timeout" from="EnemyShooter/FlashTimer" to="EnemyShooter" method="_on_flash_timer_timeout"]
 [connection signal="timeout" from="EnemyShooter/KnockbackTimer" to="EnemyShooter" method="_on_knockback_timer_timeout"]
+[connection signal="timeout" from="Spawner/SpawnTimer" to="Spawner" method="_on_spawn_timer_timeout"]

scenes/arena/spawner.gd

@@ -0,0 +1,65 @@
+extends Node2D
+class_name Spawner
+
+@export var spawn_area_size := Vector2(1000, 500)
+@export var waves_data: Array[WaveData]
+@export var enemy_collection: Array[UnitStats]
+
+@onready var spawn_timer: Timer = $SpawnTimer
+@onready var wave_timer: Timer = $WaveTimer
+
+var wave_index := 1
+var current_wave_data: WaveData
+var spawned_enemiese: Array[Enemy] = []
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	start_wave()
+
+
+func find_wave_data() -> WaveData:
+	for wave in waves_data:
+		if wave and wave.is_vaild_index(wave_index):
+			return wave
+	return null
+	
+
+func start_wave() -> void:
+	current_wave_data = find_wave_data()
+	if not current_wave_data :
+		printerr("No valid wave.")
+		spawn_timer.stop()
+		wave_timer.stop()
+		return
+		
+	wave_timer.wait_time = current_wave_data.wave_time
+	wave_timer.start()
+	
+	set_spawn_timer()
+	
+func set_spawn_timer() -> void:
+	match current_wave_data.spawn_type:
+		WaveData.SpawnType.FIXED:
+			spawn_timer.wait_time = current_wave_data.fixed_spawn_time
+		WaveData.SpawnType.RANDOM:
+			var min_t := current_wave_data.min_spawn_time
+			var max_t := current_wave_data.max_spawn_time
+			spawn_timer.wait_time = randf_range(min_t, max_t)
+	
+	if spawn_timer.is_stopped():
+		spawn_timer.start()
+	
+func spawn_enemy() -> void:
+	var enemy_scene := current_wave_data.get_randon_unit_scene() as PackedScene		
+	if enemy_scene:
+		var enemy_instance := enemy_scene.instantiate() as Enemy
+		enemy_instance.global_position = Vector2.ZERO
+		get_parent().add_child(enemy_instance)
+		spawned_enemiese.append(enemy_instance)
+	
+	set_spawn_timer()
+	
+
+func _on_spawn_timer_timeout() -> void:
+	spawn_enemy()

scenes/arena/spawner.gd.uid

@@ -0,0 +1 @@
+uid://bd5bscq0u8wld