问这是一个好的设计选择吗？

EN

class Game {
public:
  Signal<void (float, float)> PlayerMovedTo;

  void update() {
    if ( downKeyPressed ) {
       y += 10;
       PlayerMovedTo( x, y ); // Tell everyone about it
    }
  }
};


class Mine {
public:
  Mine() {
    // There can be many mines, all connected to the one signal.
    game.PlayerMovedTo.connect( this, &Mine::playerMoved );
  }

  void playerMoved( float x, float y ) {
    if ( distance( this->x, this->y, x, y ) < 10 ) {
      boom();
    }
  }
};