         style("opacity", 0.8).
         attr("d", (link) => @link_line link.path_points())
 
+      # Node elements are grouped inside an svg element, so we can use relative
+      # coordinates
+      #
+      # The container just stores the x and y coordinates
+      #
       @nodes = @svg.selectAll("svg.node").
         data(@module.nodes.models, (d) -> d.get('id')).
         enter().

        attr("width", @width)

      colors = d3.scale.category20()
      link_color = d3.scale.category20()

      @links = @svg.selectAll('path.link').
        data(@module.links.models, (d) -> d.cid).


    # returns the absolute y coordinate of the left anchor point
    #
    # This method should definitely be simplified
    left_y:  =>
      offset = null
      for link in @left.right_links
