public void setTBondSelected(int i, boolean b) {
		if (modelManager.frame.frameRenderer instanceof ExtendedFrameRenderer) {
			ExtendedFrameRenderer fr = (ExtendedFrameRenderer) modelManager.frame.frameRenderer;
			TBond x = fr.tbonds.getTBond(i);
			if (x != null)
				x.selected = b;
		}
	}