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 +1,78 @@
+class_name LaserBeam
+extends Node2D
+## 直线激光束：从所在位置垂直向上延伸，被第一个命中的敌人截断，
+## 对其造成持续伤害（dps）。视觉为核心线 + 外发光双层 Line2D。
+
+var dps := 10.0
+var width := 5.0
+var color := Color(0.55, 0.9, 1.0)
+var active := false
+
+var _core: Line2D
+var _glow: Line2D
+var _acc := 0.0
+var _t := 0.0
+
+
+func _ready() -> void:
+	z_index = 5
+	_glow = Line2D.new()
+	_glow.width = width * 2.8
+	_glow.default_color = Color(color, 0.28)
+	_glow.points = [Vector2.ZERO, Vector2(0.0, -10.0)]
+	add_child(_glow)
+	_core = Line2D.new()
+	_core.width = width
+	_core.default_color = color
+	_core.points = [Vector2.ZERO, Vector2(0.0, -10.0)]
+	add_child(_core)
+	visible = false
+
+
+## 从自身祖先中解析所属游戏的敌容器（避免多实例时全局组查找拿错容器）
+func _get_enemies_container() -> Node2D:
+	var node := get_parent()
+	while node != null:
+		var candidate := node.get_node_or_null("Enemies")
+		if candidate != null:
+			return candidate as Node2D
+		node = node.get_parent()
+	return null
+
+
+func _process(delta: float) -> void:
+	if not active:
+		if visible:
+			visible = false
+		return
+	visible = true
+	_t += delta
+
+	var muzzle := global_position
+	var hit_y := -40.0
+	var target: EnemyBase = null
+	var container := _get_enemies_container()
+	if container != null:
+		for enemy in container.get_children():
+			if enemy is EnemyBase and not (enemy as EnemyBase).dead:
+				var e := enemy as EnemyBase
+				if absf(e.global_position.x - muzzle.x) < e.hit_radius + width * 0.5:
+					# 光束向上：命中敌人底缘；若炮口已进入敌人范围则从炮口起算
+					var hy := minf(muzzle.y, e.global_position.y + e.hit_radius)
+					if hy >= hit_y:
+						hit_y = hy
+						target = e
+
+	var length := maxf(muzzle.y - hit_y, 0.0)
+	var pulse := 1.0 + 0.1 * sin(_t * 42.0)
+	_core.width = width * pulse
+	_glow.width = width * 2.8 * pulse
+	_core.points = [Vector2.ZERO, Vector2(0.0, -length)]
+	_glow.points = [Vector2.ZERO, Vector2(0.0, -length)]
+
+	if target != null and is_instance_valid(target):
+		_acc += dps * delta
+		if _acc >= 1.0:
+			var whole := int(_acc)
+			_acc -= float(whole)
+			target.apply_damage(whole)