feat: 场景与核心玩法脚本（双机型/波次/Boss/道具/炸弹/地面单位/浮游炮激光）

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
2026-08-31 00:31:29 +08:00
parent 024447fbda
commit 3c6f31b503
36 changed files with 1692 additions and 0 deletions
@@ -0,0 +1,71 @@
+class_name EnemySmall
+extends EnemyBase
+## 小型敌机：直线下压 + 可选横向摆动，部分会朝正下方开火。
+
+const TEX := preload("res://assets/svg/enemy_small.svg")
+
+var base_x := 270.0
+var vy := 150.0
+var sway_amp := 0.0
+var sway_freq := 2.0
+var phase := 0.0
+var shoot := false
+var bullet_speed := 250.0
+
+var _t := 0.0
+var _shoot_timer := 0.0
+
+
+func setup(
+	p_base_x: float,
+	p_y: float,
+	p_vy: float,
+	p_sway_amp := 0.0,
+	p_sway_freq := 2.0,
+	p_phase := 0.0,
+	p_shoot := false,
+	p_bullet_speed := 250.0
+) -> void:
+	base_x = p_base_x
+	position = Vector2(p_base_x, p_y)
+	vy = p_vy
+	sway_amp = p_sway_amp
+	sway_freq = p_sway_freq
+	phase = p_phase
+	shoot = p_shoot
+	bullet_speed = p_bullet_speed
+
+
+func _ready() -> void:
+	collision_layer = 4
+	collision_mask = 0
+	hp = 1
+	score_value = 100
+	hit_radius = 14.0
+	var sprite := Sprite2D.new()
+	sprite.texture = TEX
+	# 掉落道具的敌机染成红色涂装（1942 惯例：红机掉宝）
+	if drops_powerup:
+		sprite.modulate = Color(1.0, 0.5, 0.4)
+	add_child(sprite)
+	var shape := CollisionShape2D.new()
+	var capsule := CapsuleShape2D.new()
+	capsule.radius = 12.0
+	capsule.height = 34.0
+	shape.shape = capsule
+	add_child(shape)
+	_shoot_timer = randf_range(1.2, 2.4)
+
+
+func _process(delta: float) -> void:
+	_t += delta
+	position.y += vy * delta
+	position.x = base_x + sin(_t * sway_freq + phase) * sway_amp
+	if position.y > 1010.0 or position.x < -50.0 or position.x > 590.0:
+		queue_free()
+		return
+	if shoot and position.y > 90.0 and position.y < 640.0:
+		_shoot_timer -= delta
+		if _shoot_timer <= 0.0:
+			_shoot_timer = randf_range(1.8, 3.0)
+			_fire_bullet(Vector2(0.0, bullet_speed))