Force-Directed-Graph-Unity-Neo4j

Demo Video on Youtube:

Testing:

1. Install Neo4j Desktop
2. Open Unity (ForceDirectedGraphUnity)
3. check server setting variables in ServerConnector on Graph Object (neo4j ip,user,pwd...etc)
4. hit RUN!

Structure:

► NeoUnity(VS Folder) : defination of Neo4j data class such like Nodes and Relationships

• Server.cs : connect to Neo4j server and put data value in Node and Relationship class

it produced NeoUnity.dll for unity project below.

► ForceDirectedGraph(Unity Folder) : Render force directed graph by neo4j movie data

Frontend(On Graph Object in Scene):

• ServerConnector.cs: setup data entity(movie and person) , server settings.
• GraphRenderer.cs : setup UI , Graph settings(relationship line color) , Camera. new Graph and GraphScene in Awake(). and create Nodes and Edges(Relationship) while while receiving the neo4j data.

Backend:

• SimpleGraphBackend.cs : extend AbstractGraphBackend.cs Interface.
• SimpleGraphEdge.cs : extend AbstractGraphEdge.cs Interface.
• SimpleGraphNode.cs : extend AbstractGraphNode.cs Interface.
• Graph.cs : extend GraphBackendListener.cs .define NewNode and NewEdge
• GraphScene.cs : set nodes distance by updating SpringJoint Rigidbody SphereCollider component
• NodeComponent.cs : extend AbstractSceneComponent.cs Interface. Initial Node gameObject.
• EdgeComponent.cs : extend AbstractSceneComponent.cs Interface. Set LineRenderer between 2 Node gameObjects.
• FruchtermanReingoldLayout.cs : Calculate Attraction,Repulsion,Gravity physics force between nodes by Fruchterman-Reingold algorithm.

the git repo is only a experimental project. the parameters setting and 1000 Iterations is a rough number to show small amount of nodes. Theoretically, the force-directed graph needs more time (iterations) by different amount level to draw a relatively stable graph. add up the Iterations and decrease speed in FruchtermanReingoldLayout.cs and increase area in GraphRenderer.cs to fit larger graph.