QTransform transform; transform.scale(2, 2);
QTransform transform; transform.scale(3, 2);
QVectorThe package library for QTransform is the Qt library.points; // Populate points vector... QTransform transform; transform.scale(1, 1, 0.5); for (int i = 0; i < points.size(); ++i) { points[i] = transform.map(points[i]); }