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.
87 lines
2.4 KiB
GDScript
87 lines
2.4 KiB
GDScript
extends Area2D
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## 弹幕子弹：直线飞行，碰到玩家扣血。
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## 贴图是代码生成的实心圆，不需要额外美术素材。
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@export var speed: float = 70.0
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@export var damage: int = 1
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@export var lifetime: float = 8.0
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@export var radius: int = 3
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@export var bullet_color: Color = Color(1.0, 0.35, 0.7)
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## 撞到地形/绳子之类的障碍就消失。
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## 关掉（默认）的话子弹会**穿过一切**，只靠存活时间和出界来回收
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@export var stop_on_obstacle: bool = false
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## 掉到这个世界 y 以下就自动回收（默认在关卡底部之外）
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@export var despawn_y: float = 340.0
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var direction: Vector2 = Vector2.LEFT
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var _age: float = 0.0
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var _probe: RayCast2D = null
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static var _cache: Dictionary = {}
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## 生成（并缓存）一个实心圆贴图
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static func circle_texture(r: int, color: Color) -> ImageTexture:
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var key := "%d|%s" % [r, color.to_html()]
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if _cache.has(key):
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return _cache[key]
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var size: int = r * 2 + 1
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var img := Image.create_empty(size, size, false, Image.FORMAT_RGBA8)
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img.fill(Color(0.0, 0.0, 0.0, 0.0))
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var limit := float(r * r) + float(r) * 0.6
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for y in size:
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for x in size:
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var dx := float(x - r)
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var dy := float(y - r)
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if dx * dx + dy * dy <= limit:
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img.set_pixel(x, y, color)
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var tex := ImageTexture.create_from_image(img)
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_cache[key] = tex
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return tex
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func _ready() -> void:
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add_to_group("bullet")
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var sprite := get_node_or_null("Sprite") as Sprite2D
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if sprite != null:
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sprite.texture = circle_texture(radius, bullet_color)
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var hit := get_node_or_null("HitBox") as CollisionShape2D
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if hit != null and hit.shape is CircleShape2D:
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var circle := (hit.shape as CircleShape2D).duplicate() as CircleShape2D
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circle.radius = float(radius)
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hit.shape = circle
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_probe = get_node_or_null("Probe") as RayCast2D
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if _probe != null:
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_probe.enabled = stop_on_obstacle
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body_entered.connect(_on_body_entered)
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func launch(dir: Vector2, spd: float = -1.0) -> void:
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direction = dir.normalized()
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if spd > 0.0:
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speed = spd
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func _physics_process(delta: float) -> void:
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_age += delta
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if _age >= lifetime or global_position.y > despawn_y:
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queue_free()
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return
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var step := direction * speed * delta
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if stop_on_obstacle and _probe != null:
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_probe.target_position = step * 1.5
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_probe.force_raycast_update()
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if _probe.is_colliding():
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queue_free()
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return
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position += step
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func _on_body_entered(body: Node2D) -> void:
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if body.has_method("hurt"):
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body.hurt(damage)
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queue_free()
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