Don't instantiate scripts for Editor + ScriptComponent Serialzation + Don't crash when scene loading failed

GlitchyEditor/src/EditWindows/ComponentEditWindow.bf

@@ -464,7 +464,7 @@ namespace GlitchyEditor.EditWindows
 
 				search = StringView(&buffer);
 
-				for (let (className, script) in ScriptEngine.EntityClasses)
+				for (let (className, scriptClass) in ScriptEngine.EntityClasses)
 				{
 					if (!search.IsWhiteSpace && !className.Contains(search, true))
 						continue;
@@ -472,9 +472,14 @@ namespace GlitchyEditor.EditWindows
 					if (ImGui.Selectable(className.ToScopeCStr!(),
 						className == scriptComponent.Instance?.ScriptClass.FullName))
 					{
-						scriptComponent.Instance = new ScriptInstance(script);
-						scriptComponent.Instance.ReleaseRef();
-						ScriptEngine.InitializeInstance(entity, scriptComponent);
+						//scriptComponent.Instance = new ScriptInstance(scriptClass);
+						// decrement refCount to 1 (scriptComponent.Instance increments its)
+						//scriptComponent.Instance.ReleaseRef();
+						//ScriptEngine.InitializeInstance(entity, scriptComponent);
+
+						scriptComponent.ScriptClass = scriptClass;
+						
+						ScriptEngine.CreateScriptFieldMap(entity);
 					}
 				}
 				ImGui.EndPopup();
@@ -505,9 +510,11 @@ namespace GlitchyEditor.EditWindows
 				scriptInstance.SetFieldValue<T>(scriptField, value);
 			}
 
-
-			void ShowClassFields(SharpClass sharpClass, ScriptInstance scriptInstance)
+			if (scriptComponent.Instance?.IsInitialized == true)
 			{
+				SharpClass sharpClass = scriptComponent.Instance.ScriptClass;
+				ScriptInstance scriptInstance = scriptComponent.Instance;
+
 				for (let (fieldName, scriptField) in sharpClass.Fields)
 				{
 					var monoField = scriptField.[Friend]_monoField;
@@ -579,67 +586,124 @@ namespace GlitchyEditor.EditWindows
 					case .Entity:
 						// TODO!
 						
-					case .Class:
-						// TODO!
 					case .Enum:
 						// TODO!
 					case .Struct:
 						// TODO!
-					/*case .Struct:
-						ShowStructFields();
-						{
-							
-							uint8[128] bla = ?;
-							GetFieldValue<uint8[128]>(scriptInstance, scriptField);
-
-							Mono.MonoObject* dings = (Mono.MonoObject*)&bla;
-
-							//ShowFields
-						}*/
 					default:
 						Log.EngineLogger.Error($"Unhandled field type {scriptField.FieldType}");
 					}
 				}
 			}
-			/*void ShowStructFields(SharpClass sharpClass, ScriptInstance scriptInstance)
+			else if (scriptComponent.ScriptClass != null)
 			{
-				for (let (fieldName, scriptField) in sharpClass.Fields)
-				{
-					var monoField = scriptField.[Friend]_monoField;
+				let scriptFields = ScriptEngine.GetScriptFieldMap(entity);
 
-					switch (scriptField.FieldType)
+				for (var (name, field) in ref scriptFields)
 				{
+					switch (field.Field.FieldType)
+					{
+					case .Bool:
+						var value = field.GetData<bool>();
+						if (ImGui.Checkbox(name.ToScopeCStr!(), &value))
+							field.SetData(value);
+
+					case .SByte:
+						var value = field.GetData<int8>();
+						if (ImGui.DragScalar(name.ToScopeCStr!(), .S8, &value))
+							field.SetData(value);
+						case .Short:
+							var value = field.GetData<int16>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .S16, &value))
+								field.SetData(value);
 					case .Int:
-						int32 value = GetFieldValue<int32>(scriptInstance, scriptField);
-						if (ImGui.DragInt(fieldName.ToScopeCStr!(), &value))
-							SetFieldValue(scriptInstance, scriptField, value);
+							var value = field.GetData<int32>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .S32, &value))
+								field.SetData(value);
+					case .Int2:
+							var value = field.GetData<int2>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .S32, &value, 2))
+								field.SetData(value);
+					case .Int3:
+							var value = field.GetData<int3>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .S32, &value, 3))
+								field.SetData(value);
+					case .Int4:
+							var value = field.GetData<int4>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .S32, &value, 4))
+								field.SetData(value);
+					case .Long:
+							var value = field.GetData<int64>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .S64, &value))
+								field.SetData(value);
+
+					case .Byte:
+							var value = field.GetData<uint8>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .U8, &value))
+								field.SetData(value);
+					case .UShort:
+							var value = field.GetData<uint16>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .U16, &value))
+								field.SetData(value);
+					case .UInt:
+							var value = field.GetData<uint32>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .U32, &value))
+								field.SetData(value);
+					case .ULong:
+							var value = field.GetData<uint64>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .U64, &value))
+								field.SetData(value);
+
 					case .Float:
-						float value = GetFieldValue<int32>(scriptInstance, scriptField);
-						if (ImGui.DragFloat(fieldName.ToScopeCStr!(), &value))
-							SetFieldValue(scriptInstance, scriptField, value);
+							var value = field.GetData<float>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .Float, &value))
+								field.SetData(value);
+					case .float2:
+							var value = field.GetData<float2>();
+							if (ImGui.Editfloat2(name, ref value))
+								field.SetData(value);
+					case .float3:
+							var value = field.GetData<float3>();
+							if (ImGui.Editfloat3(name, ref value))
+								field.SetData(value);
+					case .float4:
+							var value = field.GetData<float4>();
+							if (ImGui.Editfloat4(name, ref value))
+								field.SetData(value);
+
 					case .Double:
-						double value = GetFieldValue<double>(scriptInstance, scriptField);
-						if (ImGui.DragScalar(fieldName.ToScopeCStr!(), .Double, &value))
-							SetFieldValue(scriptInstance, scriptField, value);
-					/*case .Struct:
-						{
+							var value = field.GetData<double>();
+							if (ImGui.DragScalar(name.ToScopeCStr!(), .Double, &value))
+								field.SetData(value);
+					case .Double2:
+							var value = field.GetData<double2>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .Double, &value, 2))
+								field.SetData(value);
+					case .Double3:
+							var value = field.GetData<double3>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .Double, &value, 3))
+								field.SetData(value);
+					case .Double4:
+							var value = field.GetData<double4>();
+							if (ImGui.DragScalarN(name.ToScopeCStr!(), .Double, &value, 4))
+								field.SetData(value);
 
-							uint8[128] bla = ?;
-							GetFieldValue<uint8[128]>(scriptInstance, scriptField);
+					case .Enum:
+						// TODO!
 						
-							Mono.MonoObject* dings = (Mono.MonoObject*)&bla;
+					//case .String:
+						// TODO!
+
+					case .Entity:
+						// TODO!
+
+					case .Struct:
+						// TODO!
 
-							//ShowFields
-						}*/
 					default:
-						Log.EngineLogger.Error($"Unhandled field type {scriptField.FieldType}");
+						Log.EngineLogger.Error($"Unhandled field type {field.Field.FieldType}");
 					}
 				}
-			}*/
-
-			if (scriptComponent.Instance?.IsInitialized == true)
-			{
-				ShowClassFields(scriptComponent.Instance.ScriptClass, scriptComponent.Instance);
 			}
 		}
 

GlitchyEditor/src/EditorLayer.bf

@@ -620,17 +620,27 @@ namespace GlitchyEditor
 
 			SceneFilePath = scope String(filename);
 
-			_editorScene.ReleaseRef();
-			_editorScene = new Scene();
-			_editor.CurrentScene = _editorScene;
+			using (Scene newScene = new Scene())
+			{
 				var vpSize = _editor.SceneViewportWindow.ViewportSize;
-			_editorScene.OnViewportResize((.)vpSize.X, (.)vpSize.Y);
+				newScene.OnViewportResize((.)vpSize.X, (.)vpSize.Y);
 
-			SceneSerializer serializer = scope .(_editorScene);
-			serializer.Deserialize(SceneFilePath);
+				SceneSerializer serializer = scope .(newScene);
+				let result = serializer.Deserialize(SceneFilePath);
 
+				// Make sure we actually loaded something!
+				if (result case .Ok)
+				{
+					SetReference!(_editorScene, newScene);
+					_editor.CurrentScene = _editorScene;
 					SetReference!(_activeScene, _editorScene);
 				}
+				else
+				{
+					Log.EngineLogger.Error("Failed to load scene file.");
+				}
+			}
+		}
 
 		private void DrawOpenRecentProjectMenu()
 		{

GlitchyEngine/src/Scripting/ScriptClass.bf

@@ -23,6 +23,32 @@ public struct ScriptField
 	}
 }
 
+public struct ScriptFieldInstance
+{
+	public ScriptField Field;
+	// TODO: I hate this, but we need to be able to store an entire matrix
+	internal uint8[sizeof(GlitchyEngine.Math.Matrix)] _data;
+
+	public this(ScriptField field)
+	{
+		Field = field;
+		_data = default;
+	}
+
+	public T GetData<T>()
+	{
+#unwarn
+		return *(T*)&_data;
+	}
+	
+	public void SetData<T>(T value) mut
+	{
+		*(T*)&_data = value;
+	}
+}
+
+public typealias ScriptFieldMap = Dictionary<StringView, ScriptFieldInstance>;
+
 abstract class SharpType : RefCounter
 {
 	protected String _namespace ~ delete _;

GlitchyEngine/src/Scripting/ScriptEngine.bf

@@ -23,7 +23,7 @@ enum ScriptFieldType
 
 	SByte,
 	Short,
-	Int,// int2, int3, int4,
+	Int, Int2, Int3, Int4,
 	Long,
 	Byte,
 	UShort,
@@ -31,11 +31,69 @@ enum ScriptFieldType
 	ULong,
 	// Half, Half2, Half3, Half4,
 	Float, float2, float3, float4,
-	Double, // Double2, Double3, Double4,
+	Double, Double2, Double3, Double4,
 
 	Entity
 }
 
+extension ScriptFieldType
+{
+	public Type GetBeefType()
+	{
+		switch(this)
+		{
+		case .Bool:
+			return typeof(bool);
+
+		case .SByte:
+			return typeof(int8);
+		case .Short:
+			return typeof(int16);
+		case .Int:
+			return typeof(int32);
+		case .Int2:
+			return typeof(int2);
+		case .Int3:
+			return typeof(int3);
+		case .Int4:
+			return typeof(int4);
+		case .Long:
+			return typeof(int64);
+			
+
+		case .Byte:
+				return typeof(uint8);
+		case .UShort:
+				return typeof(uint16);
+		case .UInt:
+				return typeof(uint32);
+		case .ULong:
+				return typeof(uint64);
+			
+		case .Float:
+				return typeof(float);
+		case .float2:
+				return typeof(float2);
+		case .float3:
+				return typeof(float3);
+		case .float4:
+				return typeof(float4);
+			
+		case .Double:
+				return typeof(double);
+		case .Double2:
+				return typeof(double2);
+		case .Double3:
+				return typeof(double3);
+		case .Double4:
+				return typeof(double4);
+
+		default:
+			return null;
+		}
+	}
+}
+
 static sealed class ScriptEngineHelper
 {
 	private static Dictionary<StringView, ScriptFieldType> _scriptFieldTypes = new Dictionary<StringView, ScriptFieldType>()
@@ -53,9 +111,10 @@ static sealed class ScriptEngineHelper
 		("System.UInt64", .ULong),
 
 		("System.Single", .Float),
-		("GlitchyEngine.Math.float2", .float2),
-		("GlitchyEngine.Math.float3", .float3),
-		("GlitchyEngine.Math.float4", .float4),
+		// TODO: We probably want to switch the C#-Library to use the superior floatN-Names
+		("GlitchyEngine.Math.Vector2", .float2),
+		("GlitchyEngine.Math.Vector3", .float3),
+		("GlitchyEngine.Math.Vector4", .float4),
 
 		("System.Double", .Double),
 
@@ -102,6 +161,8 @@ static class ScriptEngine
 
 	public static Scene Context => s_Context;
 
+	private static Dictionary<UUID, ScriptFieldMap> _entityFields = new .() ~ DeleteDictionaryAndValues!(_);
+
 	internal static class Attributes
 	{
 		internal static MonoClass* s_ShowInEditorAttribute;
@@ -148,6 +209,22 @@ static class ScriptEngine
 		//_entityScriptInstances[entity.UUID] = script.Instance..AddRef();
 
 		script.Instance.Instantiate(entity.UUID);
+
+		CopyEditorFieldsToInstance(entity, script);
+	}
+
+	private static void CopyEditorFieldsToInstance(Entity entity, ScriptComponent* script)
+	{
+		// Technically the map is for a different entity (namely the editor-entity),
+		// however the UUID is the same, so we get the correct field map
+		let fiels = GetScriptFieldMap(entity);
+
+		for (var (fieldName, field) in fiels)
+		{
+			// TODO: a litte assertion maybe?
+
+			script.Instance.SetFieldValue(field.Field, field._data);
+		}
 	}
 
 	private static MonoAssembly* LoadCSharpAssembly(StringView assemblyPath)
@@ -290,7 +367,39 @@ static class ScriptEngine
 		}
 	}
 
+	public static void CreateScriptFieldMap(Entity entity)
+	{
+		Log.EngineLogger.AssertDebug(entity.IsValid);
 
+		if (_entityFields.TryGetValue(entity.UUID, var entityFields))
+		{
+			entityFields.Clear();
+		}
+		else
+		{
+			entityFields = new Dictionary<StringView, ScriptFieldInstance>();
+			_entityFields.Add(entity.UUID, entityFields);
+		}
+
+		let scriptComponent = entity.GetComponent<ScriptComponent>();
+
+		for (let (fieldName, field) in scriptComponent.ScriptClass.Fields)
+		{
+			entityFields.Add(fieldName, ScriptFieldInstance(field));
+		}
+	}
+
+	public static ScriptFieldMap GetScriptFieldMap(Entity entity)
+	{
+		Log.EngineLogger.AssertDebug(entity.IsValid);
+
+		let uuid = entity.UUID;
+
+		// TODO: Entites bekommen noch kein Eintrag hier!!
+		Log.EngineLogger.AssertDebug(_entityFields.ContainsKey(uuid));
+
+		return _entityFields[uuid];
+	}
 
 
 

GlitchyEngine/src/Scripting/ScriptInstance.bf

@@ -68,88 +68,4 @@ class ScriptInstance : RefCounter
 	{
 		_scriptClass.SetFieldValue<T>(_instance, field.[Friend]_monoField, value);
 	}
-
-	public void CopyEditorFieldsTo(ScriptInstance target)
-	{
-		for (let (fieldName, field) in ScriptClass.Fields)
-		{
-			switch (field.FieldType)
-			{
-			case .Bool:
-				var value = GetFieldValue<bool>(field);
-				target.SetFieldValue(field, value);
-
-			case .SByte:
-				var value = GetFieldValue<int8>(field);
-				target.SetFieldValue(field, value);
-			case .Short:
-				var value = GetFieldValue<int16>(field);
-				target.SetFieldValue(field, value);
-			case .Int:
-				var value = GetFieldValue<int32>(field);
-				target.SetFieldValue(field, value);
-			case .Long:
-				var value = GetFieldValue<int64>(field);
-				target.SetFieldValue(field, value);
-
-			case .Byte:
-				var value = GetFieldValue<uint8>(field);
-				target.SetFieldValue(field, value);
-			case .UShort:
-				var value = GetFieldValue<uint16>(field);
-				target.SetFieldValue(field, value);
-			case .UInt:
-				var value = GetFieldValue<uint32>(field);
-				target.SetFieldValue(field, value);
-			case .ULong:
-				var value = GetFieldValue<uint64>(field);
-				target.SetFieldValue(field, value);
-
-			case .Float:
-				var value = GetFieldValue<float>(field);
-				target.SetFieldValue(field, value);
-
-			/*case .float2:
-				GetFieldValue<float2>(field, var value);
-				if (ImGui.Editfloat2(fieldName, ref value))
-					SetFieldValue(field, value);
-			case .float3:
-				GetFieldValue<float3>(field, var value);
-				if (ImGui.Editfloat3(fieldName, ref value))
-					SetFieldValue(field, value);
-			case .float4:
-				GetFieldValue<float4>(field, var value);
-				if (ImGui.Editfloat4(fieldName, ref value))
-					SetFieldValue(field, value);
-
-			case .Double:
-				var value = GetFieldValue<double>(field);
-				if (ImGui.DragScalar(fieldName.ToScopeCStr!(), .Double, &value))
-					SetFieldValue(field, value);
-
-			case .Entity:
-				// TODO!
-				
-			case .Class:
-				// TODO!
-			case .Enum:
-				// TODO!
-			case .Struct:
-				// TODO!*/
-			/*case .Struct:
-				ShowStructFields();
-				{
-					
-					uint8[128] bla = ?;
-					GetFieldValue<uint8[128]>(scriptField);
-
-					Mono.MonoObject* dings = (Mono.MonoObject*)&bla;
-
-					//ShowFields
-				}*/
-			default:
-				Log.EngineLogger.Error($"Unhandled field type {field.FieldType}");
-			}
-		}
-	}
 }

GlitchyEngine/src/World/Components/Components.bf

@@ -507,8 +507,16 @@ namespace GlitchyEngine.World
 
 	struct ScriptComponent : IDisposableComponent
 	{
+		private ScriptClass _scriptClass = null;
+
 		private ScriptInstance _instance = null;
 
+		public ScriptClass ScriptClass
+		{
+			get => _scriptClass;
+			set mut => SetReference!(_scriptClass, value);
+		}
+
 		public ScriptInstance Instance
 		{
 			[Inline]
@@ -517,12 +525,16 @@ namespace GlitchyEngine.World
 			set mut => SetReference!(_instance, value);
 		}
 
+		/// Gets whether or not this script component has a script assigned (that means ScriptClass isn't null).
+		public bool HasScript => _scriptClass != null;
+
 		public bool IsInitialized => _instance?.IsInitialized ?? false;
 
 		public bool IsCreated => _instance?.IsCreated ?? false;
 
 		public void Dispose() mut
 		{
+			ReleaseRefAndNullify!(_scriptClass);
 			ReleaseRefAndNullify!(_instance);
 		}
 	}

GlitchyEngine/src/World/Scene.bf

@@ -93,13 +93,11 @@ namespace GlitchyEngine.World
 				Entity targetEntity = target.GetEntityByID(sourceEntity.UUID);
 				ScriptComponent* targetComponent = targetEntity.AddComponent<ScriptComponent>();
 
-				targetComponent.Instance = new ScriptInstance(sourceComponent.Instance.ScriptClass);
+				targetComponent.Instance = new ScriptInstance(sourceComponent.ScriptClass);
 				targetComponent.Instance..ReleaseRef();
 
-				// We need an instance so we can copy the variables to it
+				// Initializes the created instance
 				ScriptEngine.InitializeInstance(targetEntity, targetComponent);
-
-				sourceComponent.Instance.CopyEditorFieldsTo(targetComponent.Instance);
 			}
 
 			// Copy transforms... needs special handling for the Parent<->Child relations

GlitchyEngine/src/World/SceneSerializer.bf

@@ -8,6 +8,7 @@ using GlitchyEngine.Core;
 using System.Collections;
 using GlitchyEngine.Renderer;
 using GlitchyEngine.Content;
+using GlitchyEngine.Scripting;
 
 namespace GlitchyEngine.World;
 
@@ -185,6 +186,28 @@ class SceneSerializer
 			{
 				Serialize.Value(writer, "Material", component.Material);
 			});
+
+			SerializeComponent<ScriptComponent>(writer, entity, "ScriptComponent", scope (component) =>
+			{
+				Serialize.Value(writer, "ScriptClass", component.ScriptClass?.FullName);
+
+				if (component.HasScript)
+				{
+					let fields = ScriptEngine.GetScriptFieldMap(entity);
+
+					for (var (fieldName, fieldInstance) in fields)
+					{
+						switch (fieldInstance.Field.FieldType)
+						{
+						case .Entity, .Enum, .Class, .Struct:
+							// TODO: implement
+						default:
+							writer.Identifier(fieldName);
+							Serialize.Value(writer, ValueView(fieldInstance.Field.FieldType.GetBeefType(), &fieldInstance.[Friend]_data), gBonEnv);
+						}
+					}
+				}
+			});
 		}
 
 		writer.EntryEnd();
@@ -512,6 +535,73 @@ class SceneSerializer
 
 					return .Ok;
 				}));
+			case "ScriptComponent":
+				Try!(DeserializeComponent<ScriptComponent>(reader, entity, scope (component) =>
+				{
+					String scriptClassName = null;
+
+					Try!(Deserialize.Value(reader, "ScriptClass", out scriptClassName));
+
+					if (scriptClassName != null)
+					{
+						if (ScriptEngine.EntityClasses.TryGetValue(scriptClassName, let scriptClass))
+						{
+							component.ScriptClass = scriptClass;
+						}
+
+						delete scriptClassName;
+					}
+
+					if (component.HasScript)
+					{
+						// This whole operation is technically a bit junk, because we are not guaranteed to successfully deserialize the scene,
+						// however we are editing the ScriptEngine because it doesn't care about which scene is active right now.
+						// The UUID should be unique enough, however if they do overlap (e.g. loading the current scene or simply because we are unlucky)
+						// we will replace the fields of the active scene, even if deserialization fails...
+						// But that is a bug for me to rediscover in the distant future, so in case this bug occurred and it took ages for you to
+						// figure out what happened: You are welcome :)
+
+						ScriptEngine.CreateScriptFieldMap(entity);
+
+						var fields = ScriptEngine.GetScriptFieldMap(entity);
+						
+						Try!(reader.EntryEnd());
+
+						bool first = true;
+
+						while (reader.ObjectHasMore())
+						{
+							if (first)
+								first = false;
+							else
+								Try!(reader.EntryEnd());
+
+							// TODO: We could think about doing the Try! a little smarter...
+							// However we always might just fail to deserialize, so it doesn't really matter.
+
+							StringView fieldName = Try!(reader.Identifier());
+
+							if (fields.ContainsKey(fieldName))
+							{
+								var field = ref fields[fieldName];
+
+								void* data = &field.[Friend]_data;
+
+								Try!(Deserialize.Value(reader, ValueView(field.Field.FieldType.GetBeefType(), data), gBonEnv));
+							}
+						}
+					}
+
+					return .Ok;
+				}));
+				 /*
+				 
+
+				SerializeComponent<ScriptComponent>(writer, entity, "ScriptComponent", scope (component) =>
+				{
+					Serialize.Value(writer, "ScriptClass", component.ScriptClass?.FullName);
+				});
+				 */
 			default:
 				Log.EngineLogger.AssertDebug(false, "Unknown component type");
 				//return .Err;