fix:work around on scene object serialization

Scenes/SampleScene.unity

@@ -199,7 +199,7 @@ Canvas:
   m_OverrideSorting: 0
   m_OverridePixelPerfect: 0
   m_SortingBucketNormalizedSize: 0
-  m_AdditionalShaderChannelsFlag: 0
+  m_AdditionalShaderChannelsFlag: 25
   m_UpdateRectTransformForStandalone: 0
   m_SortingLayerID: 0
   m_SortingOrder: 0
@@ -625,6 +625,90 @@ Transform:
   m_Father: {fileID: 507038910}
   m_RootOrder: -1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!1 &1648230696
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1648230698}
+  - component: {fileID: 1648230697}
+  m_Layer: 0
+  m_Name: Square
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!212 &1648230697
+SpriteRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1648230696}
+  m_Enabled: 1
+  m_CastShadows: 0
+  m_ReceiveShadows: 0
+  m_DynamicOccludee: 1
+  m_StaticShadowCaster: 0
+  m_MotionVectors: 1
+  m_LightProbeUsage: 1
+  m_ReflectionProbeUsage: 1
+  m_RayTracingMode: 0
+  m_RayTraceProcedural: 0
+  m_RenderingLayerMask: 1
+  m_RendererPriority: 0
+  m_Materials:
+  - {fileID: 10754, guid: 0000000000000000f000000000000000, type: 0}
+  m_StaticBatchInfo:
+    firstSubMesh: 0
+    subMeshCount: 0
+  m_StaticBatchRoot: {fileID: 0}
+  m_ProbeAnchor: {fileID: 0}
+  m_LightProbeVolumeOverride: {fileID: 0}
+  m_ScaleInLightmap: 1
+  m_ReceiveGI: 1
+  m_PreserveUVs: 0
+  m_IgnoreNormalsForChartDetection: 0
+  m_ImportantGI: 0
+  m_StitchLightmapSeams: 1
+  m_SelectedEditorRenderState: 0
+  m_MinimumChartSize: 4
+  m_AutoUVMaxDistance: 0.5
+  m_AutoUVMaxAngle: 89
+  m_LightmapParameters: {fileID: 0}
+  m_SortingLayerID: 0
+  m_SortingLayer: 0
+  m_SortingOrder: 0
+  m_Sprite: {fileID: 7482667652216324306, guid: 311925a002f4447b3a28927169b83ea6, type: 3}
+  m_Color: {r: 1, g: 1, b: 1, a: 1}
+  m_FlipX: 0
+  m_FlipY: 0
+  m_DrawMode: 0
+  m_Size: {x: 1, y: 1}
+  m_AdaptiveModeThreshold: 0.5
+  m_SpriteTileMode: 0
+  m_WasSpriteAssigned: 1
+  m_MaskInteraction: 0
+  m_SpriteSortPoint: 0
+--- !u!4 &1648230698
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1648230696}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_RootOrder: 3
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1701140682
 GameObject:
   m_ObjectHideFlags: 0
@@ -752,14 +836,14 @@ MonoBehaviour:
       m_Calls: []
   m_text: Button
   m_isRightToLeft: 0
-  m_fontAsset: {fileID: 0}
-  m_sharedMaterial: {fileID: 0}
+  m_fontAsset: {fileID: 11400000, guid: 8f586378b4e144a9851e7b34d9b748ee, type: 2}
+  m_sharedMaterial: {fileID: 2180264, guid: 8f586378b4e144a9851e7b34d9b748ee, type: 2}
   m_fontSharedMaterials: []
   m_fontMaterial: {fileID: 0}
   m_fontMaterials: []
   m_fontColor32:
     serializedVersion: 2
-    rgba: 4294967295
+    rgba: 4281479730
   m_fontColor: {r: 0.19607843, g: 0.19607843, b: 0.19607843, a: 1}
   m_enableVertexGradient: 0
   m_colorMode: 3
@@ -772,7 +856,7 @@ MonoBehaviour:
   m_spriteAsset: {fileID: 0}
   m_tintAllSprites: 0
   m_StyleSheet: {fileID: 0}
-  m_TextStyleHashCode: 0
+  m_TextStyleHashCode: -1183493901
   m_overrideHtmlColors: 0
   m_faceColor:
     serializedVersion: 2
@@ -803,7 +887,7 @@ MonoBehaviour:
   checkPaddingRequired: 0
   m_isRichText: 1
   m_parseCtrlCharacters: 1
-  m_isOrthographic: 0
+  m_isOrthographic: 1
   m_isCullingEnabled: 0
   m_horizontalMapping: 0
   m_verticalMapping: 0

TNode/Attribute/GraphUsageAttribute.cs

@@ -13,6 +13,7 @@ namespace TNode.Attribute{
     /// </summary>
     [AttributeUsage(AttributeTargets.Class)]
     [BaseTypeRequired(typeof(IModel))]
+    [UsedImplicitly]
     public class GraphUsageAttribute:System.Attribute{
         public readonly Type GraphDataType;
         public string Category;

TNode/DataWrapper.cs

@@ -5,10 +5,10 @@ using UnityEngine;
 
 namespace TNode.Editor.Serialization{
     [Serializable]
-    public class DataWrapper<TWrapper,TData>:ScriptableObject where TWrapper:DataWrapper<TWrapper,TData> where TData:IModel,new(){
+    public class DataWrapper<TWrapper,TData>:ScriptableObject where TWrapper:DataWrapper<TWrapper,TData>,new(){
         [SerializeReference]
         public TData data;
-        private static readonly Dictionary<TData,TWrapper> Cache = new ();
+        protected static readonly Dictionary<TData,TWrapper> Cache = new ();
         public static TWrapper Get(TData data){
             if (data.GetType().IsGenericType){
                 return CreateInstance<TWrapper>();
@@ -33,10 +33,13 @@ namespace TNode.Editor.Serialization{
             var fieldInfo = data.GetType().GetField(path);
             return fieldInfo.GetValue(data);
         }
+        public virtual TData GetData(){
+            return data;
+        }
         public static implicit operator TData(DataWrapper<TWrapper,TData> wrapper){
             if (wrapper == null)
                 return default(TData);
-            return wrapper.data;
+            return wrapper.GetData();
      
         }
         /// <summary>

TNode/Models/BlackboardData.cs

@@ -1,8 +1,13 @@
 using System;
+using System.Collections.Generic;
+using Object = UnityEngine.Object;
 
 namespace TNode.Models{
+    /// <summary>
+    /// Black board data can store scene data
+    /// </summary>
     [Serializable]
+    
     public class BlackboardData:IModel{
-
     }
 }

TNode/Models/GraphData.cs

@@ -17,6 +17,9 @@ namespace TNode.Models{
         [SerializeReference]
         public BlackboardData blackboardData;
 
+        [HideInInspector] 
+        public string sceneReference;
+
         public List<NodeLink> NodeLinks{
             get{
                 return nodeLinks ??= new List<NodeLink>();

TNode/Models/SceneObjectWrapper.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+using System.Linq;
+using TNode.Editor.Serialization;
+using UnityEngine;
+
+namespace TNode.Models{
+    
+    /// <summary>
+    /// Scene Object wrapper use to serialize blackboard data
+    /// </summary>
+    public class SceneObjectWrapper:DataWrapper<SceneObjectWrapper,BlackboardData>{
+        public bool loadedFromScene =false;
+
+        public List<string> sceneObjects = new List<string>();
+        public void LoadFromScene(){
+            
+        }
+        public override BlackboardData GetData(){
+            if (data == null) return null;
+            if (!Cache.ContainsKey(this)){
+                Cache.Add(data,this);
+            }
+
+            if (loadedFromScene==false){
+                loadedFromScene = true;
+            }
+            
+            return data;
+        }
+    }
+}

TNode/Models/SceneObjectWrapper.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 9603719ce2e546968394c0f2a0c83ef3
+timeCreated: 1657774760

TNodeGraphViewImpl/Editor/GraphBlackboard/DefaultGraphBlackboardView.cs

@@ -20,6 +20,7 @@ namespace TNodeGraphViewImpl.Editor.GraphBlackboard{
        
         }
         protected override void UpdateBlackboard(BlackboardData data){
+            if (data == null) return;
             var serializedObject = new SerializedObject((BlackboardDataWrapper)data);
             foreach (var field in data.GetType()
                          .GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)){