Customize Image about vivagraphjs HOT 2 CLOSED

graphics.node(function(node) {
  var ui = Viva.Graph.svg('g'),
      rect = Viva.Graph.svg('rect')
         .attr('stroke-width', 10)
         .attr('stroke', 'blue')
         .attr('width', node.data.size)
         .attr('height', node.data.size),
      img = Viva.Graph.svg('image')
         .attr('width', node.data.size)
         .attr('height', node.data.size)
         .link(node.data.url);

  ui.append(rect); 
  ui.append(img);
  ui.myCustomSize = node.data.size; // we'll talk about this later

  return ui;    
});

graphics.placeNode(function(nodeUI, pos){
    var half = nodeUI.myCustomSize/2; // myCustomSize is here!
    nodeUI.attr('transform', 
                'translate(' + 
                      (pos.x - half) + ',' + 
                      (pos.y - half) + 
                ')'); // and not so elegant syntax for transforms
});