prev_bordertime = isIncreTimeOrdered ?
Double.NEGATIVE_INFINITY :
Double.POSITIVE_INFINITY;
dobj_count = 0;
dobj_itr = slog_ins.iteratorOfRealDrawables( timeframe, dobj_order,
itrTopoLevel );
while ( dobj_itr.hasNext() ) {
dobj = (Drawable) dobj_itr.next();
dobj_bordertime = dobj.getBorderTime( isStartTimeOrdered );
if ( isIncreTimeOrdered ) {