QVector<Node*> balls; QVector<Node*> walls;for(inti=0; i<4; i++) { walls.push_back(newNode("Wall"+ QString().setNum(i+1))); }for(inti=0; i<15; i++) { balls.push_back(newNode("Ball"+ QString().setNum(i+1))); } nRot->addProperty(newIProperty());// nRot->add...