void Start()
{
// create the graph
Graph.Graph graph = new Graph.Graph();
// create an operator node
var operator01 = (NumberOperatorNode)graph.CreateNode <NumberOperatorNode>();
operator01.X = 200;
operator01.Y = 40;
operator01.SetMode(Operator.Add);
graph.AddNode(operator01);
// create a display node
var diplay01 = (NumberDisplayNode)graph.CreateNode <NumberDisplayNode>();
diplay01.X = 330;
diplay01.Y = 80;
graph.AddNode(diplay01);
// link the nodes
graph.Link(
(InputSocket)diplay01.GetSocket(typeof(INumberConnection), typeof(InputSocket), 0),
(OutputSocket)operator01.GetSocket(typeof(INumberConnection), typeof(OutputSocket), 0));
// cerate a perlin noise node
var perlinNoise = graph.CreateNode <UnityPerlinNoiseNode>();
perlinNoise.X = 80;
perlinNoise.Y = 250;
graph.AddNode(perlinNoise);
// create a display map node
var displayMap = graph.CreateNode <DisplayMapNode>();
displayMap.X = 300;
displayMap.Y = 280;
graph.AddNode(displayMap);
// link the nodes
graph.Link(
(InputSocket)displayMap.GetSocket(typeof(INumberConnection), typeof(InputSocket), 0),
(OutputSocket)perlinNoise.GetSocket(typeof(INumberConnection), typeof(OutputSocket), 0));
// to test the serialization...
// create a json out of the graph
var serializedJSON = graph.ToJson();
// dezeiralize the json back to a graph
var deserializedGraph = Graph.Graph.FromJson(serializedJSON);
// add the graph to the launcher to see it in the editor.
Launcher.Instance.AddGraph(deserializedGraph);
}