starmen1265
3c6f31b503
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
79 lines
2.1 KiB
GDScript
79 lines
2.1 KiB
GDScript
class_name LaserBeam
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extends Node2D
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## 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，
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## 对其造成持续伤害（dps）。视觉为核心线 + 外发光双层 Line2D。
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var dps := 10.0
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var width := 5.0
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var color := Color(0.55, 0.9, 1.0)
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var active := false
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var _core: Line2D
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var _glow: Line2D
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var _acc := 0.0
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var _t := 0.0
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func _ready() -> void:
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z_index = 5
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_glow = Line2D.new()
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_glow.width = width * 2.8
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_glow.default_color = Color(color, 0.28)
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_glow.points = [Vector2.ZERO, Vector2(0.0, -10.0)]
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add_child(_glow)
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_core = Line2D.new()
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_core.width = width
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_core.default_color = color
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_core.points = [Vector2.ZERO, Vector2(0.0, -10.0)]
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add_child(_core)
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visible = false
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## 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）
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func _get_enemies_container() -> Node2D:
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var node := get_parent()
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while node != null:
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var candidate := node.get_node_or_null("Enemies")
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if candidate != null:
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return candidate as Node2D
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node = node.get_parent()
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return null
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func _process(delta: float) -> void:
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if not active:
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if visible:
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visible = false
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return
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visible = true
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_t += delta
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var muzzle := global_position
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var hit_y := -40.0
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var target: EnemyBase = null
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var container := _get_enemies_container()
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if container != null:
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for enemy in container.get_children():
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if enemy is EnemyBase and not (enemy as EnemyBase).dead:
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var e := enemy as EnemyBase
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if absf(e.global_position.x - muzzle.x) < e.hit_radius + width * 0.5:
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# 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
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var hy := minf(muzzle.y, e.global_position.y + e.hit_radius)
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if hy >= hit_y:
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hit_y = hy
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target = e
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var length := maxf(muzzle.y - hit_y, 0.0)
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var pulse := 1.0 + 0.1 * sin(_t * 42.0)
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_core.width = width * pulse
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_glow.width = width * 2.8 * pulse
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_core.points = [Vector2.ZERO, Vector2(0.0, -length)]
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_glow.points = [Vector2.ZERO, Vector2(0.0, -length)]
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if target != null and is_instance_valid(target):
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_acc += dps * delta
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if _acc >= 1.0:
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var whole := int(_acc)
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_acc -= float(whole)
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target.apply_damage(whole)
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