How to access points inside window

gistfile1.cpp

void APNpSeeker::run()
{
	while (walkable()) {

                QList<float> pointsInsideWindow = QList<float>();
		for (int i = left(); i < right(); ++i) {
		    pointsInsideWindow.append( points.at(i) );
		}

                float average = sum(pointsInsideWindow) / points.length();

		moveForth();
	}
}