ai.attackHeight = s != null? s.height() : mechInFirst? 1 : 0;
ai.targetHeight = t != null? t.height() : mechInSecond? 1 : 0;
if (los == null && s != null) {
// no need to mention the attacker: it's the unit showing in the MechDisplay
ai.attackAbsHeight = game.getBoard().getHex(src).floor() + s.absHeight();
ai.targetAbsHeight = game.getBoard().getHex(coords).floor() + (t == null? 0 : t.absHeight());
} else {
// show source unit
ai.attackAbsHeight = game.getBoard().getHex(src).floor() + ai.attackHeight;
ai.targetAbsHeight = game.getBoard().getHex(coords).floor() + ai.targetHeight;
out.add(Messages.getString("BoardView1.Attacker", new Object[]{ //$NON-NLS-1$