whole_func_string: function linkAngle (link) {
      var adjacent = Math.abs(link.y1 - link.y0)
      var opposite = Math.abs(link.target.x0 - link.source.x1)
  
      return Math.atan(opposite / adjacent)
    }
func_code_string: function linkAngle (link) {
      var adjacent = Math.abs(link.y1 - link.y0)
      var opposite = Math.abs(link.target.x0 - link.source.x1)
  
      return Math.atan(opposite / adjacent)
    }
func_documentation_string: Return the angle between a straight line between the source and target of the link, and the vertical plane of the node