Qt 利用飞机图片画五边形

最近练习Qt，需要一个飞机在屏幕上画五边形。虽然达到的效果不是非常的理想，但是勉强还是达到了效果，欢迎大家指正。用到的飞机图片如下。

第一步：初始化，在构造函数里面，把图片向左旋转18°

// 向左旋转18°
matrix.rotate(-);
ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));

第二步：在定时器里面执行如下代码

switch(flag)
        {
        case :
            {
                if (num == )
                {
                    num = ;
                    flag = ;
                    matrix.rotate();
                    ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
                }
                int x = ui.label->x() - ;
                int y = ui.label->y() - ;
                ui.label->move(x, y);
                num++;
                break;
            }
        case :
            {
                if (num == )
                {
                    num = ;
                    flag = ;
                    matrix.rotate();
                    ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
                }
                int x = ui.label->x() + ;
                int y = ui.label->y() - ;
                ui.label->move(x, y);
                num++;
                break;
            }
        case :
            {
                if (num == )
                {
                    num = ;
                    flag = ;
                    matrix.rotate();
                    ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
                }
                int x = ui.label->x() + ;
                int y = ui.label->y() + ;
                ui.label->move(x, y);
                num++;
                break;
            }
        case :
            {
                if (num == )
                {
                    num = ;
                    flag = ;
                    matrix.rotate();
                    ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
                }
                int x = ui.label->x() - ;
                int y = ui.label->y() + ;
                ui.label->move(x, y);
                num++;
                break;
            }
        case :
            {
                if (num == )
                {
                    num = ;
                    flag = ;
                    matrix.rotate();
                    ui.label->setPixmap(QPixmap("C:\\Users\\Administrator.USER-20190313RI\\Desktop\\img\\life.png").transformed(matrix, Qt::SmoothTransformation));
                }
                int x = ui.label->x() - ;
                int y = ui.label->y();
                ui.label->move(x, y);
                num++;
                break;
            }
        default:
            {
                break;
            }
        }