/// <summary> /// Fetches every Node Declaration in the script assemblies to provide the framework with custom node types /// </summary> public static void FetchNodeTypes() { nodes = new Dictionary <string, NodeTypeData> (); foreach (Type type in ReflectionUtility.getSubTypes(typeof(Node))) { object[] nodeAttributes = type.GetCustomAttributes(typeof(NodeAttribute), false); NodeAttribute attr = nodeAttributes[0] as NodeAttribute; if (attr == null || !attr.hide) { // Only regard if it is not marked as hidden // Fetch node information string ID, Title = "None"; FieldInfo IDField = type.GetField("ID"); if (IDField == null || attr == null) { // Cannot read ID from const field or need to read Title because of missing attribute -> Create sample to read from properties Node sample = (Node)ScriptableObject.CreateInstance(type); ID = sample.GetName; Title = sample.Title; UnityEngine.Object.DestroyImmediate(sample); } else // Can read ID directly from const field { ID = (string)IDField.GetValue(null); } // Create Data from information NodeTypeData data = attr == null? // Switch between explicit information by the attribute or node information new NodeTypeData(ID, Title, type, new Type[0]) : new NodeTypeData(ID, attr.contextText, type, attr.limitToCanvasTypes); nodes.Add(ID, data); } } }
/// <summary> /// Creates a node of the specified ID at pos on the specified canvas, optionally auto-connecting the specified output to a matching input /// silent disables any events, init specifies whether OnCreate should be called /// </summary> public static Node Create(string nodeID, Vector2 pos, NodeCanvas hostCanvas, ConnectionPort connectingPort = null, bool silent = false, bool init = true) { if (string.IsNullOrEmpty(nodeID) || hostCanvas == null) { throw new ArgumentException(); } if (!NodeCanvasManager.CheckCanvasCompability(nodeID, hostCanvas.GetType())) { throw new UnityException("Cannot create Node with ID '" + nodeID + "' as it is not compatible with the current canavs type (" + hostCanvas.GetType().ToString() + ")!"); } if (!hostCanvas.CanAddNode(nodeID)) { throw new UnityException("Cannot create Node with ID '" + nodeID + "' on the current canvas of type (" + hostCanvas.GetType().ToString() + ")!"); } // Create node from data NodeTypeData data = NodeTypes.getNodeData(nodeID); Node node = (Node)CreateInstance(data.type); if (node == null) { return(null); } // Init node state node.name = node.Title; node.autoSize = node.DefaultSize; node.position = pos; node.Canvas = hostCanvas; ConnectionPortManager.UpdateConnectionPorts(node); if (init) { node.OnCreate(); } if (connectingPort != null) { // Handle auto-connection and link the output to the first compatible input for (int i = 0; i < node.connectionPorts.Count; i++) { if (node.connectionPorts[i].TryApplyConnection(connectingPort, silent)) { break; } } } // Add node to host canvas hostCanvas.nodes.Add(node); if (!silent) { // Callbacks hostCanvas.OnNodeChange(connectingPort != null ? connectingPort.body : node); NodeEditorCallbacks.IssueOnAddNode(node); hostCanvas.Validate(); NodeEditor.RepaintClients(); } return(node); }
/// <summary> /// Checks whether the süecified nodeID is compatible with the given canvas type /// 检测制定的Node ID是否与当前Canvas相匹配 /// </summary> public static bool CheckCanvasCompability(string nodeID, Type canvasType) { NodeTypeData data = NodeTypes.GetNodeData(nodeID); return(data.limitToCanvasTypes == null || data.limitToCanvasTypes.Length == 0 || data.limitToCanvasTypes.Contains(canvasType)); }
/// <summary> /// Creates a node of the specified ID at pos on the specified canvas, optionally auto-connecting the specified output to a matching input /// silent disables any events, init specifies whether OnCreate should be called /// </summary> public static Node Create(string nodeID, Vector2 pos, NodeCanvas hostCanvas, ConnectionPort connectingPort = null, bool silent = false, bool init = true) { if (string.IsNullOrEmpty(nodeID) || hostCanvas == null) { throw new ArgumentException(); } if (!NodeCanvasManager.CheckCanvasCompability(nodeID, hostCanvas.GetType())) { throw new UnityException("Cannot create Node with ID '" + nodeID + "' as it is not compatible with the current canavs type (" + hostCanvas.GetType().ToString() + ")!"); } if (!hostCanvas.CanAddNode(nodeID)) { throw new UnityException("Cannot create Node with ID '" + nodeID + "' on the current canvas of type (" + hostCanvas.GetType().ToString() + ")!"); } // Create node from data NodeTypeData data = NodeTypes.getNodeData(nodeID); Node node = (Node)CreateInstance(data.type); if (node == null) { return(null); } // Init node state node.canvas = hostCanvas; node.name = node.Title; node.autoSize = node.DefaultSize; node.position = pos; ConnectionPortManager.UpdateConnectionPorts(node); if (init) { node.OnCreate(); } if (connectingPort != null) { // Handle auto-connection and link the output to the first compatible input for (int i = 0; i < node.connectionPorts.Count; i++) { if (node.connectionPorts[i].TryApplyConnection(connectingPort, true)) { break; } } } // Add node to host canvas hostCanvas.nodes.Add(node); if (!silent) { // Callbacks hostCanvas.OnNodeChange(connectingPort != null ? connectingPort.body : node); NodeEditorCallbacks.IssueOnAddNode(node); hostCanvas.Validate(); NodeEditor.RepaintClients(); } #if UNITY_EDITOR if (!silent) { List <ConnectionPort> connectedPorts = new List <ConnectionPort>(); foreach (ConnectionPort port in node.connectionPorts) { // 'Encode' connected ports in one list (double level cannot be serialized) foreach (ConnectionPort conn in port.connections) { connectedPorts.Add(conn); } connectedPorts.Add(null); } Node createdNode = node; UndoPro.UndoProManager.RecordOperation( () => NodeEditorUndoActions.ReinstateNode(createdNode, connectedPorts), () => NodeEditorUndoActions.RemoveNode(createdNode), "Create Node"); // Make sure the new node is in the memory dump NodeEditorUndoActions.CompleteSOMemoryDump(hostCanvas); } #endif return(node); }