Adding JSON serialization UI

Editor/ClusterJson_Drawer.cs

@@ -0,0 +1,72 @@
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace NanoBrain.Unity {
+
+    [CustomPropertyDrawer(typeof(ClusterJson))]
+    class ClusterJson_Drawer : PropertyDrawer {
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+            EditorGUI.BeginProperty(position, label, property);
+
+            ClusterJson clusterJson = property.objectReferenceValue as ClusterJson;
+            if (clusterJson == null) {
+                clusterJson = ScriptableObject.CreateInstance<ClusterJson>();
+
+                property.objectReferenceValue = clusterJson;
+                property.serializedObject.ApplyModifiedProperties();
+
+                EditorUtility.SetDirty(property.serializedObject.targetObject);
+            }
+            SerializedObject so = new(clusterJson);
+            SerializedProperty jsonFileProp = so.FindProperty(nameof(ClusterJson.jsonFile));
+
+            EditorGUI.BeginChangeCheck();
+
+            TextAsset current = jsonFileProp.objectReferenceValue as TextAsset;
+                Rect fieldRect = new(position.x, position.y, position.width, EditorGUIUtility.singleLineHeight);
+            TextAsset newAsset = (TextAsset)EditorGUI.ObjectField(fieldRect, label, current, typeof(TextAsset), false);
+
+            if (EditorGUI.EndChangeCheck()) {
+                jsonFileProp.objectReferenceValue = newAsset;
+                so.ApplyModifiedProperties();
+            }
+            bool showWarning = IsInvalidJson(jsonFileProp);
+            if (showWarning) {
+                Rect helpRect = new(
+                    position.x,
+                    position.y + EditorGUIUtility.singleLineHeight + 2f,
+                    position.width,
+                    EditorGUIUtility.singleLineHeight * 2f
+                );
+                propertyExtraHeight = 2 + 2 * EditorGUIUtility.singleLineHeight;
+                EditorGUI.HelpBox(helpRect, "Selected asset is not a .json file.", MessageType.Error);
+            } else 
+                propertyExtraHeight = 0;
+
+            EditorGUI.EndProperty();
+        }
+
+        private float propertyExtraHeight = 0;
+
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label) {
+            return EditorGUIUtility.singleLineHeight + propertyExtraHeight;
+        }
+
+        private readonly Dictionary<EntityId, bool> _invalidCache = new();
+
+        private bool IsInvalidJson(SerializedProperty jsonFileProp) {
+            TextAsset current = jsonFileProp.objectReferenceValue as TextAsset;
+            if (current == null) return false;
+
+            EntityId id = current.GetEntityId();
+            if (_invalidCache.TryGetValue(id, out bool invalid))
+                return invalid;
+
+            string path = AssetDatabase.GetAssetPath(current);
+            invalid = !path.EndsWith(".json", System.StringComparison.OrdinalIgnoreCase);
+            _invalidCache[id] = invalid;
+            return invalid;
+        }
+    }
+}

Editor/ClusterJson_Drawer.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 879b585246de16598959c21b724cf105

Editor/Cluster_Drawer.cs

@@ -25,7 +25,8 @@ namespace NanoBrain.Unity {
                 return height;
 
             SerializedProperty prefabProp = property.FindPropertyRelative(nameof(Cluster.prefab));
-            if (prefabProp.objectReferenceValue != null && Cluster_Drawer.currentClusterView.isOpen) {
+            if (//prefabProp.objectReferenceValue != null &&
+             Cluster_Drawer.currentClusterView.isOpen) {
                 height = graphHeight;
             }
             else {
@@ -92,18 +93,19 @@ namespace NanoBrain.Unity {
             }
 
             // If a brain has been selected
-            if (prefabProp.objectReferenceValue != null) {
+            //if (prefabProp.objectReferenceValue != null) {
             // Graph is not shown when multi-editing
             if (property.serializedObject.targetObjects.Length == 1) {
                 UnityEngine.Object targetObject = property.serializedObject.targetObject;
                 Cluster_Drawer.selectedTarget = targetObject;
 
                 Cluster cluster = SerializedPropertyUtility.GetManagedObjectForProperty(targetObject, property.propertyPath) as Cluster;
-                    if (cluster.version != cluster.prefab.version) {
-                        // Debug.Log($"prefab version: {cluster.prefab.version} cluster version: {cluster.version}");
-                        clusterView.initialized = false;
-                        EditorApplication.delayCall += () => InstantiateCluster(property, clusterView);
-                    }
+                if (cluster != null) {
+                    // if (cluster.version != cluster.prefab.version) {
+                    //     // Debug.Log($"prefab version: {cluster.prefab.version} cluster version: {cluster.version}");
+                    //     clusterView.initialized = false;
+                    //     EditorApplication.delayCall += () => InstantiateCluster(property, clusterView);
+                    // }
 
                     // foldout header rect
                     Rect headerRect = new(fieldRect.x, fieldRect.yMax + 4f, fieldRect.width, EditorGUIUtility.singleLineHeight);
@@ -122,8 +124,10 @@ namespace NanoBrain.Unity {
                         clusterView.Render(drawRect);
                         //Debug.Log(prefab.cluster.defaultOutput.outputMagnitude);
                     }
+
                 }
             }
+            //}
 
             EditorGUI.indentLevel = indent;
             EditorGUI.EndProperty();

Runtime/Scripts/ClusterJson.cs

@@ -0,0 +1,10 @@
+using UnityEngine;
+
+namespace NanoBrain.Unity {
+
+    [System.Serializable]
+    public class ClusterJson : ScriptableObject {
+        public TextAsset jsonFile;
+    }
+
+}

Runtime/Scripts/ClusterJson.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 8ea9c456ab9da37daaa610edaadc38bb

Runtime/Scripts/Core/Cluster.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Collections.Generic;
 using UnityEngine;
 #if UNITY_MATHEMATICS
@@ -112,6 +113,24 @@ namespace NanoBrain {
             ClonePrefab();
         }
 
+        public Cluster(ClusterJson json) {
+            ClusterData clusterData = JsonUtility.FromJson<ClusterData>(json.jsonFile.text);
+            this.name = clusterData.name;
+            // First create all neurons
+            foreach (NeuronData neuronData in clusterData.neurons) {
+                Neuron newNeuron = new(this, neuronData.name);
+            }
+            // Now create the synapses between them
+            foreach (NeuronData neuronData in clusterData.neurons) {
+                Neuron receiver = this.GetNeuron(neuronData.name);
+                foreach (SynapseData synapseData in neuronData.synapses) {
+                    Neuron sender = this.GetNeuron(synapseData.neuronName);
+                    sender?.AddReceiver(receiver, synapseData.weight);
+                }
+            }
+        }
+
+
         /// <summary>
         /// Clone a prefab.
         /// </summary>
@@ -785,6 +804,11 @@ namespace NanoBrain {
             System.IO.File.WriteAllText(path, json);
         }
 
+        public ClusterData Import(string path) {
+            string json = File.ReadAllText(path);
+            return JsonUtility.FromJson<ClusterData>(json);
+        }
+
         #endregion
     }
 
@@ -800,7 +824,8 @@ namespace NanoBrain {
                 if (nucleus is Neuron neuron) {
                     NeuronData neuronData = new(neuron);
                     this.neurons.Add(neuronData);
-                } else if (nucleus is Cluster extCluster) {
+                }
+                else if (nucleus is Cluster extCluster) {
                     ExternalClusterData clusterData = new(extCluster);
                     this.clusters.Add(clusterData);
                 }

Runtime/Scripts/Core/Nucleus.cs

@@ -39,9 +39,6 @@ namespace NanoBrain {
             Neuron,
             MemoryCell,
             Cluster,
-            //Receptor,
-            //ClusterReceptor,
-            //ClusterArray,
         }
 
         #region Update