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 +1,118 @@
+class_name Boss
+extends EnemyBase
+## 关底 Boss：四发重型轰炸机。
+## 进场悬停后左右巡逻；弹幕双模式交替（瞄准连发 / 扇形散布），
+## 半血进入狂暴阶段（弹速、频率、弹幕密度提升）。
+## 死亡时爆炸链 + 震屏 + 清除全场敌弹。
+
+const TEX := preload("res://assets/svg/boss_plane.svg")
+const CENTER_X := 270.0
+const ENTER_Y := 150.0
+const ENTER_SPEED := 100.0
+const PATROL_AMP := 145.0
+const MUZZLE := Vector2(0.0, 55.0)
+
+var difficulty := 1.0
+var max_hp := 120
+
+var _t := 0.0
+var _entered := false
+var _pattern_index := 0
+var _pattern_timer := 1.4
+var _burst_left := 0
+var _burst_tick := 0.0
+
+
+func setup(p_difficulty: float) -> void:
+	difficulty = p_difficulty
+	hp = int(60.0 + 60.0 * difficulty)
+	max_hp = hp
+	score_value = 5000
+	drops_powerup = true
+	hit_radius = 62.0
+	position = Vector2(CENTER_X, -120.0)
+
+
+func _ready() -> void:
+	collision_layer = 4
+	collision_mask = 0
+	var sprite := Sprite2D.new()
+	sprite.texture = TEX
+	add_child(sprite)
+	var shape := CollisionShape2D.new()
+	var rect := RectangleShape2D.new()
+	rect.size = Vector2(190.0, 84.0)
+	shape.shape = rect
+	add_child(shape)
+
+
+func _process(delta: float) -> void:
+	if dead:
+		return
+	if not _entered:
+		position.y += ENTER_SPEED * delta
+		if position.y >= ENTER_Y:
+			position.y = ENTER_Y
+			_entered = true
+		return
+
+	_t += delta * (1.25 if _in_phase2() else 1.0)
+	position.x = CENTER_X + sin(_t * 0.55) * PATROL_AMP
+	position.y = ENTER_Y + sin(_t * 1.6) * 16.0
+
+	if _burst_left > 0:
+		_burst_tick -= delta
+		if _burst_tick <= 0.0:
+			_burst_tick = 0.14
+			_burst_left -= 1
+			_fire_bullet(_aim_direction() * _bullet_speed(), MUZZLE)
+	else:
+		_pattern_timer -= delta
+		if _pattern_timer <= 0.0:
+			_fire_pattern()
+
+
+func _in_phase2() -> bool:
+	return hp <= max_hp / 2.0
+
+
+func _bullet_speed() -> float:
+	return (235.0 + 40.0 * difficulty) * (1.12 if _in_phase2() else 1.0)
+
+
+func _fire_pattern() -> void:
+	var phase2 := _in_phase2()
+	if _pattern_index % 2 == 0:
+		# 瞄准连发
+		_burst_left = 5 if phase2 else 3
+		_burst_tick = 0.0
+		_pattern_timer = 1.5 if phase2 else 2.0
+	else:
+		# 扇形散布
+		var count := 8 if phase2 else 5
+		var spread := 50.0 if phase2 else 36.0
+		var speed := _bullet_speed()
+		for i in count:
+			var angle := deg_to_rad(-spread + spread * 2.0 * float(i) / float(count - 1))
+			_fire_bullet(Vector2.DOWN.rotated(angle) * speed, MUZZLE)
+		_pattern_timer = 1.7 if phase2 else 2.2
+	_pattern_index += 1
+
+
+func _die() -> void:
+	_spawn_drop(Powerup.Kind.POWER)
+	var game := get_tree().get_first_node_in_group("game") as Game
+	if game != null and is_instance_valid(game):
+		game.add_score(score_value)
+		game.add_bomb()
+		game.clear_enemy_bullets()
+		game.shake(9.0)
+	for i in 8:
+		var offset := Vector2(randf_range(-92.0, 92.0), randf_range(-56.0, 56.0))
+		if game != null and is_instance_valid(game):
+			game.spawn_explosion(global_position + offset, randf_range(1.3, 2.0))
+		await get_tree().create_timer(0.12).timeout
+	if game != null and is_instance_valid(game):
+		game.spawn_explosion(global_position, 3.0)
+	await get_tree().create_timer(0.3).timeout
+	queue_free()