424 lines
22 KiB
C#
424 lines
22 KiB
C#
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using MongoDB.Bson.Serialization.Attributes;
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace XNode {
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/// <summary>
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/// Base class for all nodes
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/// </summary>
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/// <example>
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/// Classes extending this class will be considered as valid nodes by xNode.
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/// <code>
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/// [System.Serializable]
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/// public class Adder : Node {
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/// [Input] public float a;
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/// [Input] public float b;
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/// [Output] public float result;
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///
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/// // GetValue should be overridden to return a value for any specified output port
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/// public override object GetValue(NodePort port) {
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/// return a + b;
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/// }
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/// }
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/// </code>
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/// </example>
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[Serializable]
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public abstract class Node : Sirenix.OdinInspector.SerializedScriptableObject {
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/// <summary> Used by <see cref="InputAttribute"/> and <see cref="OutputAttribute"/> to determine when to display the field value associated with a <see cref="NodePort"/> </summary>
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public enum ShowBackingValue {
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/// <summary> Never show the backing value </summary>
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Never,
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/// <summary> Show the backing value only when the port does not have any active connections </summary>
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Unconnected,
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/// <summary> Always show the backing value </summary>
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Always
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}
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public enum ConnectionType {
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/// <summary> Allow multiple connections</summary>
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Multiple,
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/// <summary> always override the current connection </summary>
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Override,
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}
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/// <summary> Tells which types of input to allow </summary>
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public enum TypeConstraint {
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/// <summary> Allow all types of input</summary>
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None,
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/// <summary> Allow connections where input value type is assignable from output value type (eg. ScriptableObject --> Object)</summary>
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Inherited,
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/// <summary> Allow only similar types </summary>
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Strict,
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/// <summary> Allow connections where output value type is assignable from input value type (eg. Object --> ScriptableObject)</summary>
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InheritedInverse,
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}
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#region Obsolete
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[Obsolete("Use DynamicPorts instead")]
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public IEnumerable<NodePort> InstancePorts { get { return DynamicPorts; } }
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[Obsolete("Use DynamicOutputs instead")]
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public IEnumerable<NodePort> InstanceOutputs { get { return DynamicOutputs; } }
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[Obsolete("Use DynamicInputs instead")]
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public IEnumerable<NodePort> InstanceInputs { get { return DynamicInputs; } }
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[Obsolete("Use AddDynamicInput instead")]
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public NodePort AddInstanceInput(Type type, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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return AddDynamicInput(type, connectionType, typeConstraint, fieldName);
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}
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[Obsolete("Use AddDynamicOutput instead")]
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public NodePort AddInstanceOutput(Type type, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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return AddDynamicOutput(type, connectionType, typeConstraint, fieldName);
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}
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[Obsolete("Use AddDynamicPort instead")]
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private NodePort AddInstancePort(Type type, NodePort.IO direction, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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return AddDynamicPort(type, direction, connectionType, typeConstraint, fieldName);
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}
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[Obsolete("Use RemoveDynamicPort instead")]
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public void RemoveInstancePort(string fieldName) {
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RemoveDynamicPort(fieldName);
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}
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[Obsolete("Use RemoveDynamicPort instead")]
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public void RemoveInstancePort(NodePort port) {
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RemoveDynamicPort(port);
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}
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[Obsolete("Use ClearDynamicPorts instead")]
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public void ClearInstancePorts() {
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ClearDynamicPorts();
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}
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#endregion
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/// <summary> Iterate over all ports on this node. </summary>
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public IEnumerable<NodePort> Ports { get { foreach (NodePort port in ports.Values) yield return port; } }
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/// <summary> Iterate over all outputs on this node. </summary>
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public IEnumerable<NodePort> Outputs { get { foreach (NodePort port in Ports) { if (port.IsOutput) yield return port; } } }
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/// <summary> Iterate over all inputs on this node. </summary>
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public IEnumerable<NodePort> Inputs { get { foreach (NodePort port in Ports) { if (port.IsInput) yield return port; } } }
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/// <summary> Iterate over all dynamic ports on this node. </summary>
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public IEnumerable<NodePort> DynamicPorts { get { foreach (NodePort port in Ports) { if (port.IsDynamic) yield return port; } } }
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/// <summary> Iterate over all dynamic outputs on this node. </summary>
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public IEnumerable<NodePort> DynamicOutputs { get { foreach (NodePort port in Ports) { if (port.IsDynamic && port.IsOutput) yield return port; } } }
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/// <summary> Iterate over all dynamic inputs on this node. </summary>
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public IEnumerable<NodePort> DynamicInputs { get { foreach (NodePort port in Ports) { if (port.IsDynamic && port.IsInput) yield return port; } } }
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/// <summary> Parent <see cref="NodeGraph"/> </summary>
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[BsonIgnore]
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[SerializeField] public NodeGraph graph;
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/// <summary> Position on the <see cref="NodeGraph"/> </summary>
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[SerializeField] public Vector2 position;
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/// <summary> It is recommended not to modify these at hand. Instead, see <see cref="InputAttribute"/> and <see cref="OutputAttribute"/> </summary>
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[SerializeField]
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[HideInInspector]
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private NodePortDictionary ports = new NodePortDictionary();
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/// <summary> Used during node instantiation to fix null/misconfigured graph during OnEnable/Init. Set it before instantiating a node. Will automatically be unset during OnEnable </summary>
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public static NodeGraph graphHotfix;
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protected void OnEnable() {
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if (graphHotfix != null) graph = graphHotfix;
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graphHotfix = null;
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UpdatePorts();
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Init();
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}
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/// <summary> Update static ports and dynamic ports managed by DynamicPortLists to reflect class fields. This happens automatically on enable or on redrawing a dynamic port list. </summary>
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public void UpdatePorts() {
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NodeDataCache.UpdatePorts(this, ports);
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}
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/// <summary> Initialize node. Called on enable. </summary>
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protected virtual void Init() { }
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/// <summary> Checks all connections for invalid references, and removes them. </summary>
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public void VerifyConnections() {
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foreach (NodePort port in Ports) port.VerifyConnections();
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}
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#region Dynamic Ports
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/// <summary> Convenience function. </summary>
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/// <seealso cref="AddInstancePort"/>
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/// <seealso cref="AddInstanceOutput"/>
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public NodePort AddDynamicInput(Type type, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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return AddDynamicPort(type, NodePort.IO.Input, connectionType, typeConstraint, fieldName);
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}
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/// <summary> Convenience function. </summary>
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/// <seealso cref="AddInstancePort"/>
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/// <seealso cref="AddInstanceInput"/>
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public NodePort AddDynamicOutput(Type type, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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return AddDynamicPort(type, NodePort.IO.Output, connectionType, typeConstraint, fieldName);
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}
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/// <summary> Add a dynamic, serialized port to this node. </summary>
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/// <seealso cref="AddDynamicInput"/>
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/// <seealso cref="AddDynamicOutput"/>
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private NodePort AddDynamicPort(Type type, NodePort.IO direction, Node.ConnectionType connectionType = Node.ConnectionType.Multiple, Node.TypeConstraint typeConstraint = TypeConstraint.None, string fieldName = null) {
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if (fieldName == null) {
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fieldName = "dynamicInput_0";
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int i = 0;
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while (HasPort(fieldName)) fieldName = "dynamicInput_" + (++i);
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} else if (HasPort(fieldName)) {
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Debug.LogWarning("Port '" + fieldName + "' already exists in " + name, this);
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return ports[fieldName];
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}
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NodePort port = new NodePort(fieldName, type, direction, connectionType, typeConstraint, this);
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ports.Add(fieldName, port);
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return port;
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}
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/// <summary> Remove an dynamic port from the node </summary>
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public void RemoveDynamicPort(string fieldName) {
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NodePort dynamicPort = GetPort(fieldName);
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if (dynamicPort == null) throw new ArgumentException("port " + fieldName + " doesn't exist");
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RemoveDynamicPort(GetPort(fieldName));
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}
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/// <summary> Remove an dynamic port from the node </summary>
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public void RemoveDynamicPort(NodePort port) {
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if (port == null) throw new ArgumentNullException("port");
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else if (port.IsStatic) throw new ArgumentException("cannot remove static port");
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port.ClearConnections();
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ports.Remove(port.fieldName);
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}
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/// <summary> Removes all dynamic ports from the node </summary>
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[ContextMenu("Clear Dynamic Ports")]
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public void ClearDynamicPorts() {
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List<NodePort> dynamicPorts = new List<NodePort>(DynamicPorts);
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foreach (NodePort port in dynamicPorts) {
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RemoveDynamicPort(port);
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}
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}
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#endregion
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#region Ports
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/// <summary> Returns output port which matches fieldName </summary>
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public NodePort GetOutputPort(string fieldName) {
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NodePort port = GetPort(fieldName);
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if (port == null || port.direction != NodePort.IO.Output) return null;
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else return port;
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}
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/// <summary> Returns input port which matches fieldName </summary>
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public NodePort GetInputPort(string fieldName) {
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NodePort port = GetPort(fieldName);
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if (port == null || port.direction != NodePort.IO.Input) return null;
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else return port;
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}
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/// <summary> Returns port which matches fieldName </summary>
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public NodePort GetPort(string fieldName) {
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NodePort port;
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if (ports.TryGetValue(fieldName, out port)) return port;
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else return null;
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}
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public bool HasPort(string fieldName) {
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return ports.ContainsKey(fieldName);
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}
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#endregion
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#region Inputs/Outputs
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/// <summary> Return input value for a specified port. Returns fallback value if no ports are connected </summary>
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/// <param name="fieldName">Field name of requested input port</param>
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/// <param name="fallback">If no ports are connected, this value will be returned</param>
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public T GetInputValue<T>(string fieldName, T fallback = default(T)) {
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NodePort port = GetPort(fieldName);
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if (port != null && port.IsConnected) return port.GetInputValue<T>();
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else return fallback;
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}
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/// <summary> Return all input values for a specified port. Returns fallback value if no ports are connected </summary>
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/// <param name="fieldName">Field name of requested input port</param>
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/// <param name="fallback">If no ports are connected, this value will be returned</param>
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public T[] GetInputValues<T>(string fieldName, params T[] fallback) {
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NodePort port = GetPort(fieldName);
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if (port != null && port.IsConnected) return port.GetInputValues<T>();
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else return fallback;
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}
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/// <summary> Returns a value based on requested port output. Should be overridden in all derived nodes with outputs. </summary>
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/// <param name="port">The requested port.</param>
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public virtual object GetValue(NodePort port) {
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Debug.LogWarning("No GetValue(NodePort port) override defined for " + GetType());
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return null;
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}
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#endregion
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/// <summary> Called after a connection between two <see cref="NodePort"/>s is created </summary>
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/// <param name="from">Output</param> <param name="to">Input</param>
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public virtual void OnCreateConnection(NodePort from, NodePort to) { }
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/// <summary>
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/// Each frame processes the data
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/// </summary>
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public virtual void OnProcess() { }
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/// <summary> Called after a connection is removed from this port </summary>
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/// <param name="port">Output or Input</param>
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public virtual void OnRemoveConnection(NodePort port) { }
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/// <summary> Disconnect everything from this node </summary>
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public void ClearConnections() {
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foreach (NodePort port in Ports) port.ClearConnections();
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}
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#region Attributes
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/// <summary> Mark a serializable field as an input port. You can access this through <see cref="GetInputPort(string)"/> </summary>
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[AttributeUsage(AttributeTargets.Field)]
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public class InputAttribute : Attribute {
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public ShowBackingValue backingValue;
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public ConnectionType connectionType;
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[Obsolete("Use dynamicPortList instead")]
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public bool instancePortList { get { return dynamicPortList; } set { dynamicPortList = value; } }
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public bool dynamicPortList;
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public TypeConstraint typeConstraint;
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/// <summary> Mark a serializable field as an input port. You can access this through <see cref="GetInputPort(string)"/> </summary>
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/// <param name="backingValue">Should we display the backing value for this port as an editor field? </param>
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/// <param name="connectionType">Should we allow multiple connections? </param>
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/// <param name="typeConstraint">Constrains which input connections can be made to this port </param>
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/// <param name="dynamicPortList">If true, will display a reorderable list of inputs instead of a single port. Will automatically add and display values for lists and arrays </param>
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public InputAttribute(ShowBackingValue backingValue = ShowBackingValue.Unconnected, ConnectionType connectionType = ConnectionType.Multiple, TypeConstraint typeConstraint = TypeConstraint.None, bool dynamicPortList = false) {
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this.backingValue = backingValue;
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this.connectionType = connectionType;
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this.dynamicPortList = dynamicPortList;
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this.typeConstraint = typeConstraint;
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}
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}
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/// <summary> Mark a serializable field as an output port. You can access this through <see cref="GetOutputPort(string)"/> </summary>
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[AttributeUsage(AttributeTargets.Field)]
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public class OutputAttribute : Attribute {
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public ShowBackingValue backingValue;
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public ConnectionType connectionType;
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[Obsolete("Use dynamicPortList instead")]
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public bool instancePortList { get { return dynamicPortList; } set { dynamicPortList = value; } }
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public bool dynamicPortList;
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public TypeConstraint typeConstraint;
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/// <summary> Mark a serializable field as an output port. You can access this through <see cref="GetOutputPort(string)"/> </summary>
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/// <param name="backingValue">Should we display the backing value for this port as an editor field? </param>
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/// <param name="connectionType">Should we allow multiple connections? </param>
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/// <param name="typeConstraint">Constrains which input connections can be made from this port </param>
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/// <param name="dynamicPortList">If true, will display a reorderable list of outputs instead of a single port. Will automatically add and display values for lists and arrays </param>
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public OutputAttribute(ShowBackingValue backingValue = ShowBackingValue.Never, ConnectionType connectionType = ConnectionType.Multiple, TypeConstraint typeConstraint = TypeConstraint.None, bool dynamicPortList = false) {
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this.backingValue = backingValue;
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this.connectionType = connectionType;
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this.dynamicPortList = dynamicPortList;
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this.typeConstraint = typeConstraint;
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}
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/// <summary> Mark a serializable field as an output port. You can access this through <see cref="GetOutputPort(string)"/> </summary>
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/// <param name="backingValue">Should we display the backing value for this port as an editor field? </param>
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/// <param name="connectionType">Should we allow multiple connections? </param>
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/// <param name="dynamicPortList">If true, will display a reorderable list of outputs instead of a single port. Will automatically add and display values for lists and arrays </param>
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[Obsolete("Use constructor with TypeConstraint")]
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public OutputAttribute(ShowBackingValue backingValue, ConnectionType connectionType, bool dynamicPortList) : this(backingValue, connectionType, TypeConstraint.None, dynamicPortList) { }
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}
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/// <summary> Manually supply node class with a context menu path </summary>
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[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
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public class CreateNodeMenuAttribute : Attribute {
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|
public string menuName;
|
||
|
|
public int order;
|
||
|
|
/// <summary> Manually supply node class with a context menu path </summary>
|
||
|
|
/// <param name="menuName"> Path to this node in the context menu. Null or empty hides it. </param>
|
||
|
|
public CreateNodeMenuAttribute(string menuName) {
|
||
|
|
this.menuName = menuName;
|
||
|
|
this.order = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Manually supply node class with a context menu path </summary>
|
||
|
|
/// <param name="menuName"> Path to this node in the context menu. Null or empty hides it. </param>
|
||
|
|
/// <param name="order"> The order by which the menu items are displayed. </param>
|
||
|
|
public CreateNodeMenuAttribute(string menuName, int order) {
|
||
|
|
this.menuName = menuName;
|
||
|
|
this.order = order;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Prevents Node of the same type to be added more than once (configurable) to a NodeGraph </summary>
|
||
|
|
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
|
||
|
|
public class DisallowMultipleNodesAttribute : Attribute {
|
||
|
|
// TODO: Make inheritance work in such a way that applying [DisallowMultipleNodes(1)] to type NodeBar : Node
|
||
|
|
// while type NodeFoo : NodeBar exists, will let you add *either one* of these nodes, but not both.
|
||
|
|
public int max;
|
||
|
|
/// <summary> Prevents Node of the same type to be added more than once (configurable) to a NodeGraph </summary>
|
||
|
|
/// <param name="max"> How many nodes to allow. Defaults to 1. </param>
|
||
|
|
public DisallowMultipleNodesAttribute(int max = 1) {
|
||
|
|
this.max = max;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Specify a color for this node type </summary>
|
||
|
|
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
|
||
|
|
public class NodeTintAttribute : Attribute {
|
||
|
|
public Color color;
|
||
|
|
/// <summary> Specify a color for this node type </summary>
|
||
|
|
/// <param name="r"> Red [0.0f .. 1.0f] </param>
|
||
|
|
/// <param name="g"> Green [0.0f .. 1.0f] </param>
|
||
|
|
/// <param name="b"> Blue [0.0f .. 1.0f] </param>
|
||
|
|
public NodeTintAttribute(float r, float g, float b) {
|
||
|
|
color = new Color(r, g, b);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Specify a color for this node type </summary>
|
||
|
|
/// <param name="hex"> HEX color value </param>
|
||
|
|
public NodeTintAttribute(string hex) {
|
||
|
|
ColorUtility.TryParseHtmlString(hex, out color);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Specify a color for this node type </summary>
|
||
|
|
/// <param name="r"> Red [0 .. 255] </param>
|
||
|
|
/// <param name="g"> Green [0 .. 255] </param>
|
||
|
|
/// <param name="b"> Blue [0 .. 255] </param>
|
||
|
|
public NodeTintAttribute(byte r, byte g, byte b) {
|
||
|
|
color = new Color32(r, g, b, byte.MaxValue);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary> Specify a width for this node type </summary>
|
||
|
|
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
|
||
|
|
public class NodeWidthAttribute : Attribute {
|
||
|
|
public int width;
|
||
|
|
/// <summary> Specify a width for this node type </summary>
|
||
|
|
/// <param name="width"> Width </param>
|
||
|
|
public NodeWidthAttribute(int width) {
|
||
|
|
this.width = width;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
[Serializable] private class NodePortDictionary : Dictionary<string, NodePort>, ISerializationCallbackReceiver {
|
||
|
|
[SerializeField] private List<string> keys = new List<string>();
|
||
|
|
[SerializeField] private List<NodePort> values = new List<NodePort>();
|
||
|
|
|
||
|
|
public void OnBeforeSerialize() {
|
||
|
|
keys.Clear();
|
||
|
|
values.Clear();
|
||
|
|
foreach (KeyValuePair<string, NodePort> pair in this) {
|
||
|
|
keys.Add(pair.Key);
|
||
|
|
values.Add(pair.Value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public void OnAfterDeserialize() {
|
||
|
|
this.Clear();
|
||
|
|
|
||
|
|
if (keys.Count != values.Count)
|
||
|
|
throw new System.Exception("there are " + keys.Count + " keys and " + values.Count + " values after deserialization. Make sure that both key and value types are serializable.");
|
||
|
|
|
||
|
|
for (int i = 0; i < keys.Count; i++)
|
||
|
|
this.Add(keys[i], values[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|