New anchor functions can be defined in the
joint.anchors namespace (e.g.
joint.anchors.myAnchor) or passed directly as a function to the
anchor property of link source/target (or to the
defaultAnchor option of a paper).
In either case, the anchor function must return the anchor as a Point. The function is expected to have the form
function(endView, endMagnet, anchorReference, args):
|endView||dia.ElementView||The ElementView to which we are connecting. The Element model can be accessed as
|endMagnet||SVGElement||The SVGElement in our page that contains the magnet (element/subelement/port) to which we are connecting.|
|anchorReference||g.Point||A reference to another component of the link path that may be necessary to find this anchor point. If we are calling this method for a source anchor, it is the first vertex, or if there are no vertices the target anchor. If we are calling this method for a target anchor, it is the last vertex, or if there are no vertices the source anchor...|
|SVGElement||...if the anchor in question does not exist (yet), it is that link end's magnet. (The built-in methods usually use this element's center point as reference.)|
|args||object||An object with additional optional arguments passed to the anchor method by the user when it was called (the