public void redo() {
			super.redo();
			doNotFireUndoEvent = true;
			if (mc instanceof GayBerneParticle) {
				if (presentationName.equals("Resizing Particle")) {
					((GayBerneParticle) mc).setBreadth(x);
					((GayBerneParticle) mc).setLength(y);
				} else if (presentationName.equals("Changing Velocity")) {
					((GayBerneParticle) mc).setVx(x);
					((GayBerneParticle) mc).setVy(y);
				} else if (presentationName.equals("Changing Angular Velocity")) {
					((GayBerneParticle) mc).setOmega(x);
				}
			}
			mc.setSelected(true);
			doNotFireUndoEvent = false;
			model.notifyChange();
			repaint();
		}