package ; class Particle { public var x:Float = 0; // X座標 public var y:Float = 0; // X座標 public var vx:Float = 0; // X方向の速さ public var vy:Float = 0; // Y方向の速さ public var next:Particle; // LinkedListの参照 public function new(x:Float, y:Float) { this.x = x; this.y = y; } }