}
    }
    if( p.hasOwnProperty('mo') ){
      var x0 = p.x + node.w/2;
      var x1 = p.mo*railPitch + node.w/2;
      var u = tx.rowinfo[p.mu-tx.iTopRow];
      var y1 = miLineY(u);
      if( p.u<0 || p.mo!=p.r ){
      if( p.u<=0 || p.mo!=p.r ){
        if( p.u==0 && p.mo==p.r ){
          mergeLines[p.mo] = u.r<p.r ? -mergeOffset-mLine.w : mergeOffset;
        }else{
          mergeLines[p.mo] = -mLine.w/2;
        }
        x1 += mergeLines[p.mo]
        var y0 = p.y+2;