private void viscosityForce() {
		if (myToggles.get(VISC)) {
			for (HashMap<String, Mass> massList : springies.getMassMaps()) {
				for (Mass m : massList.values()) {
					m.xspeed = m.xspeed * myViscosity;
					m.yspeed = m.yspeed * myViscosity;
				}
			}
		}
	}