feat: 添加spawner生成器，生成敌人

resources/waves/data/wave_1_to_5.tres

@@ -0,0 +1,35 @@
+[gd_resource type="Resource" script_class="WaveData" format=3 uid="uid://cer6rdmxrnenh"]
+
+[ext_resource type="Script" uid="uid://dqhoumuppl4bx" path="res://resources/waves/wave_data.gd" id="1_cx7cn"]
+[ext_resource type="Script" uid="uid://rw3gxqh858sr" path="res://resources/waves/wave_unit_data.gd" id="2_78wao"]
+[ext_resource type="PackedScene" uid="uid://bfuqhhe8r8asg" path="res://scenes/unit/enemy/enemy_chaser_slow.tscn" id="3_a0tld"]
+[ext_resource type="PackedScene" uid="uid://c151jxi18d6uo" path="res://scenes/unit/enemy/enemy_chaser_mid.tscn" id="4_1g00u"]
+[ext_resource type="PackedScene" uid="uid://s6tc5m2wg178" path="res://scenes/unit/enemy/enemy_chaser_fast.tscn" id="5_jn2r4"]
+
+[sub_resource type="Resource" id="Resource_3lh5k"]
+script = ExtResource("2_78wao")
+unit_scene = ExtResource("3_a0tld")
+weight = 6.0
+metadata/_custom_type_script = "uid://rw3gxqh858sr"
+
+[sub_resource type="Resource" id="Resource_aei4b"]
+script = ExtResource("2_78wao")
+unit_scene = ExtResource("4_1g00u")
+weight = 3.0
+metadata/_custom_type_script = "uid://rw3gxqh858sr"
+
+[sub_resource type="Resource" id="Resource_w8f67"]
+script = ExtResource("2_78wao")
+unit_scene = ExtResource("5_jn2r4")
+weight = 1.0
+metadata/_custom_type_script = "uid://rw3gxqh858sr"
+
+[resource]
+script = ExtResource("1_cx7cn")
+from = 1
+to = 5
+units = Array[ExtResource("2_78wao")]([SubResource("Resource_3lh5k"), SubResource("Resource_aei4b"), SubResource("Resource_w8f67")])
+fixed_spawn_time = 0.5
+min_spawn_time = 0.5
+max_spawn_time = 2.0
+metadata/_custom_type_script = "uid://dqhoumuppl4bx"

resources/waves/wave_data.gd

@@ -0,0 +1,39 @@
+extends Resource
+class_name WaveData
+
+enum SpawnType {
+	FIXED,
+	RANDOM
+}
+
+@export var from: int
+@export var to: int
+@export var wave_time := 20.0
+@export var units: Array[WaveUnitData]
+
+@export var spawn_type := SpawnType.RANDOM
+@export var fixed_spawn_time := 1.0
+@export var min_spawn_time := 1.0
+@export var max_spawn_time := 1.0
+
+
+func get_randon_unit_scene() -> PackedScene:
+	if units.is_empty():
+		printerr("No Units.")
+		return null
+	
+	var enemies: Array[PackedScene]
+	var weights: Array[float]
+	
+	for unit in units:
+		enemies.append(unit.unit_scene)
+		weights.append(unit.weight)
+		
+		
+	var rng := RandomNumberGenerator.new()
+	var random_unit = enemies[rng.rand_weighted(weights)]
+	return random_unit
+	
+func is_vaild_index(index: int) -> bool:
+	return index >= from and index <= to
+	

resources/waves/wave_data.gd.uid

@@ -0,0 +1 @@
+uid://dqhoumuppl4bx

resources/waves/wave_unit_data.gd

@@ -0,0 +1,5 @@
+extends Resource
+class_name WaveUnitData
+
+@export var unit_scene: PackedScene
+@export var weight := 0.0

resources/waves/wave_unit_data.gd.uid

@@ -0,0 +1 @@
+uid://rw3gxqh858sr

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