// set the graphics

setPixmap(QPixmap(":/images/tower.png"));

// create points vector

QVector<QPointF> points;

points << QPoint(1,0) << QPoint(2,0) << QPoint(3,1) << QPoint(3,2) << QPoint(2,3)

<< QPoint(1,3) << QPoint(0,2) << QPoint(0,1);

// scale points

int SCALE_FACTOR = 65;

for (size_t i = 0, n = points.size(); i < n; i++){

points[i] *= SCALE_FACTOR;

}

// create the QGraphicsPolygonItem

attack_area = new QGraphicsPolygonItem(QPolygonF(points),this);

// move the polygon

QPointF poly_center(1.5,1.5);

poly_center *= SCALE_FACTOR;

poly_center = mapToScene(poly_center);;

QPointF tower_center(x()+44,y()+44);

QLineF ln(poly_center,tower_center);

attack_area->setPos(x()+ln.dx(),y()+ln.dy());