sijcdu
defdf202e6
Solid bullets were blocking the patrolling enemies, so the field now defaults to solid = false: each bullet is a plain StaticBody2D with no collision layer, plus an Area2D that only detects the player, so nothing is physically obstructed while contact still costs a heart. Ring radii changed from [5, 10, 15] to [3, 6, 9]. Damage is now applied every frame to whatever is overlapping, not only on body_entered, so standing inside a bullet keeps hurting instead of only the first touch. Also picks up the editor change that removed Walker_03.
143 lines
4.3 KiB
GDScript
143 lines
4.3 KiB
GDScript
extends Node2D
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## 静态弹幕障碍：以自己为圆心，一圈一圈地摆上**固定不动、不会发射**的子弹。
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##
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## 两种形态：
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## - solid = true ：实心障碍，挡路、能踩上去（注意：会连小怪一起挡住）
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## - solid = false：可以穿透，只做伤害判定 —— 配合 damage > 0 就是普通弹幕
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##
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## 落在实心地砖里、或跑出关卡范围的子弹会自动跳过。
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const BULLET_SCRIPT := preload("res://scripts/bullet.gd")
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@export var enabled: bool = true
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## 每一圈的半径（单位：格）。默认 3 格、6 格、9 格
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@export var radii_cells: Array[int] = [3, 6, 9]
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## 每圈摆几颗
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@export var per_ring: int = 20
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## 一格多少像素（图块是 18）
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@export var cell_size: float = 18.0
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## 起始角度偏移（度），用来微调子弹摆在哪个方向
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@export var angle_offset_deg: float = 0.0
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## 子弹半径
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@export var bullet_radius: int = 3
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@export var bullet_color: Color = Color(1.0, 0.45, 0.85)
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## 实心障碍：挡路、能踩上去。关掉的话就是可以穿透的纯弹幕
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@export var solid: bool = false
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## 碰到扣几颗心。0 = 不扣血
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@export var damage: int = 1
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## 超出这个范围的子弹不生成（默认整个关卡 468x270）
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@export var bounds: Rect2 = Rect2(0, 0, 468, 270)
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## 最多铺几圈
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@export var max_rings: int = 3
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## 跳过埋在地砖里的子弹
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@export var skip_solid_ground: bool = true
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var made: int = 0
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var skipped_out: int = 0
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var skipped_ground: int = 0
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var _hurt_areas: Array = []
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func _ready() -> void:
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if not enabled:
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return
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# 等一帧，确保 TileMapLayer 都已经就绪
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_build.call_deferred()
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func _build() -> void:
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var layers := _tile_layers()
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var tex := BULLET_SCRIPT.circle_texture(bullet_radius, bullet_color)
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made = 0
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skipped_out = 0
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skipped_ground = 0
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_hurt_areas.clear()
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for i in mini(radii_cells.size(), max_rings):
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var radius: float = float(radii_cells[i]) * cell_size
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for k in per_ring:
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var ang := deg_to_rad(angle_offset_deg + 360.0 * float(k) / float(per_ring))
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var pos := global_position + Vector2(cos(ang), sin(ang)) * radius
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if not bounds.has_point(pos):
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skipped_out += 1
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continue
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if skip_solid_ground and _in_solid(layers, pos):
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skipped_ground += 1
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continue
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_make(pos, tex)
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made += 1
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## 每帧检查一次：站在子弹里也会持续扣血
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## （不能只靠 body_entered —— 玩家本来就在子弹里的话不会触发）
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func _physics_process(_delta: float) -> void:
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if damage <= 0 or _hurt_areas.is_empty():
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return
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for area in _hurt_areas:
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if not is_instance_valid(area):
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continue
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for body in area.get_overlapping_bodies():
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if body.has_method("hurt"):
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body.hurt(damage)
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func _tile_layers() -> Array:
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var root: Node = owner if owner != null else get_tree().current_scene
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if root == null:
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return []
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return root.find_children("*", "TileMapLayer", true, false)
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## 这个点是不是埋在实心地砖里
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func _in_solid(layers: Array, pos: Vector2) -> bool:
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for l in layers:
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var cell: Vector2i = l.local_to_map(l.to_local(pos))
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var sid: int = l.get_cell_source_id(cell)
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if sid == -1:
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continue
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var source := l.tile_set.get_source(sid) as TileSetAtlasSource
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if source == null:
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continue
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var data: TileData = source.get_tile_data(l.get_cell_atlas_coords(cell), 0)
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if data != null and data.get_collision_polygons_count(0) > 0:
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return true
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return false
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func _make(pos: Vector2, tex: Texture2D) -> void:
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var body := StaticBody2D.new()
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if solid:
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body.collision_layer = 1
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body.collision_mask = 1
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else:
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# 不实心：谁都挡不住，只靠下面的伤害区域起作用
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body.collision_layer = 0
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body.collision_mask = 0
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add_child(body)
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body.global_position = pos
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var sprite := Sprite2D.new()
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sprite.texture = tex
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sprite.texture_filter = CanvasItem.TEXTURE_FILTER_NEAREST
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body.add_child(sprite)
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if solid:
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var shape := CollisionShape2D.new()
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var circle := CircleShape2D.new()
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circle.radius = float(bullet_radius)
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shape.shape = circle
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body.add_child(shape)
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if damage > 0:
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var area := Area2D.new()
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area.collision_layer = 4
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area.collision_mask = 2
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var hit := CollisionShape2D.new()
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var circle2 := CircleShape2D.new()
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circle2.radius = float(bullet_radius) + 1.0
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hit.shape = circle2
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area.add_child(hit)
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body.add_child(area)
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_hurt_areas.append(area)
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