Nodal Editor is a Unity Editor Scripting library that lets you create node based data structures easily.
Import latest Nodal-Editor Unity package from release section
First task is to create suitable notes for that you use NodalEditor namespace in Node class and then inherit it from BaseNode class.
Override methods from the parent class to implement custom behaviour
Methods
Function
DrawWindow
When node is rendering
ClickedOnRect
When clicked on node
SetInput
During interaction with
DrawCurves
While making connections with other nodes
Next task is to setup the custom NodeEditor like before, again use NodalEditor namespace and inherit it from NodeEditor class.
Methods
Function
OnGUI
GUI refresh call
AddNodesItem
Called to add custom nodes to the editor
ContextCallback
Called to add context menu options (to create options for other nodes)
ContextCallback
Callback for context method
OnDisable
Called when the Node Editor is dismissed
Example included inside the project 