Fossil

      if( p.hasOwnProperty('d') ) drawUpArrow({x: p.x, y: btm-node.h/2},p,p.fg);
    }
    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);
      var drawMethod = (p.f&2) ? drawCherrypickLine : drawMergeLine;
      if( p.u<0 || p.mo!=p.r ){
        x1 += mergeLines[p.mo] = -mLine.w/2;
        var y0 = p.y+2;
        if( p.r!=p.mo ) drawMethod(x0,y0,x1+(x0<x1 ? mLine.w : 0),null);
        drawMethod(x1,y0+mLine.w,null,y1);
      }else if( mergeOffset ){
        mergeLines[p.mo] = u.r<p.r ? -mergeOffset-mLine.w : mergeOffset;
        x1 += mergeLines[p.mo];
        drawMethod(x1,p.y+node.h/2,null,y1);
      }else{
        delete mergeLines[p.mo];
      }
    }
    if( p.hasOwnProperty('au') ){
      for( var i=0; i<p.au.length; i+=2 ){
        var rail = p.au[i];

    if( p.hasOwnProperty('cpi') ){
      for( var i=0; i<p.cpi.length; i++ ){
        var rail = p.cpi[i];
        if( rail<0 ){
          rail = -rail;
          mergeLines[rail] = -mLine.w/2;
          var x = rail*railPitch + (node.w-mLine.w)/2;
          drawCherrypickLine(x,miLineY(p),null,btm);
        }
        drawMergeArrow(p,rail,1);
      }
    }
  }
  var mergeLines;
  function renderGraph(){