Added nodeGraph.Copy();

Scripts/NodeGraph.cs

@@ -64,5 +64,26 @@ namespace XNode {
         public void Clear() {
             nodes.Clear();
         }
+
+        /// <summary> Create a new deep copy of this graph </summary>
+        public XNode.NodeGraph Copy() {
+            // Instantiate a new nodegraph instance
+            NodeGraph graph = Instantiate(this);
+            // Instantiate all nodes inside the graph
+            for (int i = 0; i < nodes.Count; i++) {
+                Node node = Instantiate(nodes[i]) as Node;
+                node.graph = graph;
+                graph.nodes[i] = node;
+            }
+
+            // Redirect all connections
+            for (int i = 0; i < graph.nodes.Count; i++) {
+                foreach (NodePort port in graph.nodes[i].Ports) {
+                    port.Redirect(nodes, graph.nodes);
+                }
+            }
+
+            return graph;
+        }
     }
 }

Scripts/NodePort.cs

@@ -230,11 +230,20 @@ namespace XNode {
             }
         }
 
+        /// <summary> Swap connected nodes from the old list with nodes from the new list </summary>
+        public void Redirect(List<Node> oldNodes, List<Node> newNodes) {
+            foreach (PortConnection connection in connections) {
+                int index = oldNodes.IndexOf(connection.node);
+                if (index >= 0) connection.node = newNodes[index];
+            }
+        }
+
         [Serializable]
         private class PortConnection {
             [SerializeField] public string fieldName;
             [SerializeField] public Node node;
             public NodePort Port { get { return port != null ? port : port = GetPort(); } }
+
             [NonSerialized] private NodePort port;
 
             public PortConnection(NodePort port) {