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

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+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

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+uid://dqhoumuppl4bx

resources/waves/wave_unit_data.gd

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+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