sijcdu
8127c787f8
Interval dropped from 1.0s +- 0.6 to 0.4s +- 0.25 (about 2.5 bullets per second instead of 1), which measured 13 drops in 6 seconds versus 6 before. bullet.gd gained stop_on_obstacle (default false): the probe raycast is disabled, so rain bullets fall straight through terrain and ropes and are only recycled by their lifetime or by dropping past despawn_y. Verified a bullet falling from y=190 goes through the floor at y=225 and despawns at y=340. Also picks up the editor changes: the rope tiles were removed from level 3 and a few nodes gained unique ids.
65 lines
1.9 KiB
GDScript
65 lines
1.9 KiB
GDScript
extends Node2D
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## 子弹雨：从天上随机横坐标往下落子弹，密度可以调。
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##
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## 落下来的子弹**不会被任何东西挡住**（bullet 的 stop_on_obstacle 默认关掉），
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## 会一直穿到关卡底下才回收。
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const BULLET := preload("res://scenes/prefabs/enemies/bullet.tscn")
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@export var enabled: bool = true
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## 平均多少秒落一颗（数值越大越稀疏）
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@export var interval: float = 0.4
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## 间隔随机浮动范围（0 = 完全固定节奏）
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@export var interval_jitter: float = 0.25
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## 开场后第一次落下的延迟
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@export var start_delay: float = 1.0
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## 生成高度（相对自己的 y，负数 = 从屏幕上方外面）
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@export var spawn_y: float = -30.0
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## 水平撒落范围：以自己的 x 为中心，左右各一半
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@export var span: float = 468.0
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## 下落速度
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@export var fall_speed: float = 70.0
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@export var damage: int = 1
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@export var bullet_color: Color = Color(0.55, 0.8, 1.0)
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## 固定随机种子（0 = 每次运行都不同）
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@export var random_seed: int = 0
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var _timer: float = 0.0
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var _rng := RandomNumberGenerator.new()
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var dropped: int = 0
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func _ready() -> void:
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add_to_group("bullet_rain")
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if random_seed != 0:
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_rng.seed = random_seed
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else:
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_rng.randomize()
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_timer = start_delay
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func _physics_process(delta: float) -> void:
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if not enabled:
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return
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_timer -= delta
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if _timer > 0.0:
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return
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_timer = maxf(interval + _rng.randf_range(-interval_jitter, interval_jitter), 0.05)
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drop()
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func drop() -> void:
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var bullet := BULLET.instantiate()
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# 这几个属性必须在 add_child 之前设好
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bullet.bullet_color = bullet_color
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bullet.speed = fall_speed
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bullet.damage = damage
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bullet.stop_on_obstacle = false
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get_parent().add_child(bullet)
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bullet.global_position = Vector2(
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global_position.x + _rng.randf_range(-span * 0.5, span * 0.5),
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global_position.y + spawn_y)
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bullet.launch(Vector2(0.0, 1.0), fall_speed)
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dropped += 1
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