Scripting: Basic copying of entities during runtime + Reference Components using UUID

GlitchyEngine/src/Scripting/ScriptEngine.bf

@@ -299,20 +299,26 @@ static class ScriptEngine
 	}
 
 	/// Creates an instance of the given component class referencing the specified entity instance.
-	private static MonoObject* CreateComponentReferenceInstance(ScriptClass componentClass, MonoObject* entityReferenceInstance)
+	private static MonoObject* CreateComponentReferenceInstance(ScriptClass componentClass, UUID id)//MonoObject* entityReferenceInstance)
 	{
 		MonoObject* componentInstance = componentClass.CreateInstance();
 
-		// TODO: We could cache the property, but this might be fine
+		MonoClassField* idField = Mono.mono_class_get_field_from_name(componentClass.[Friend]_monoClass, "_uuid");
+
+		s_ComponentRoot.SetFieldValue<UUID>(componentInstance, idField, id);
+
+		/*// TODO: We could cache the property, but this might be fine
 		MonoProperty* entityProperty = Mono.mono_class_get_property_from_name(componentClass.[Friend]_monoClass, "Entity");
 
 		MonoObject* exception = null;
 		
+//#unwarn
+		//Mono.mono_property_set_value(entityProperty, componentInstance, (void**)&entityReferenceInstance, &exception);
 #unwarn
-		Mono.mono_property_set_value(entityProperty, componentInstance, (void**)&entityReferenceInstance, &exception);
+		Mono.mono_property_set_value(entityProperty, componentInstance, (void**)&id, &exception);
 
 		if (exception != null)
-			ScriptEngine.HandleMonoException((MonoException*)exception, null);
+			ScriptEngine.HandleMonoException((MonoException*)exception, null);*/
 
 		return componentInstance;
 	}
@@ -345,7 +351,7 @@ static class ScriptEngine
 			case .Component:
 				// Get or create entity reference
 				UUID referencedId = field.GetData<UUID>();
-				MonoObject* referencedEntity = GetOrCreateScriptReferenceInstance(referencedId);
+				//MonoObject* referencedEntity = GetOrCreateScriptReferenceInstance(referencedId);
 
 				MonoType* fieldMonoType = scriptField.GetMonoType();
 				
@@ -353,7 +359,8 @@ static class ScriptEngine
 
 				var componentClass = ComponentClasses[componentType.FullName];
 
-				MonoObject* componentInstance = CreateComponentReferenceInstance(componentClass, referencedEntity);
+				//MonoObject* componentInstance = CreateComponentReferenceInstance(componentClass, referencedEntity);
+				MonoObject* componentInstance = CreateComponentReferenceInstance(componentClass, referencedId);
 
 				script.Instance.SetFieldValue(scriptField, componentInstance);
 
@@ -363,26 +370,81 @@ static class ScriptEngine
 			}
 		}
 	}
+
+	public static void CopyFieldsToInstance(ScriptComponent* targetScript, ScriptComponent* sourceScript, Dictionary<UUID, UUID> sourceIdToTargetId)
+	{
+		Debug.Profiler.ProfileFunction!();
+
+		Log.EngineLogger.AssertDebug(targetScript.Instance.ScriptClass == sourceScript.Instance.ScriptClass);
+
+		for (let (name, scriptField) in sourceScript.Instance.ScriptClass.Fields)
+		{
+			Debug.Profiler.ProfileScope!("Copy Field");
+
+			targetScript.Instance.CopyFieldValue(scriptField, sourceScript.Instance);
+			switch (scriptField.FieldType)
+			{
+			case .Entity:
+				let sourceEntityReference = sourceScript.Instance.GetFieldValue<MonoObject*>(scriptField);
+
+				MonoObject* referencedEntity = sourceEntityReference;
+
+				if (sourceEntityReference != null)
+				{
+					let idField = Mono.mono_class_get_field_from_name(s_EntityRoot._monoClass, "_uuid");
+					UUID sourceId = s_EntityRoot.GetFieldValue<UUID>(sourceEntityReference, idField);
+
+					// Check if we need to translate, copy otherwise
+					if (sourceIdToTargetId.TryGetValue(sourceId, let referencedId))
+					{
+						// On the C# side we actually differentiate between an Entity and the Script
+						// in the sense that getting an entity and a script yields two different results (one creates a new Entity-Class instance, the other returns the actual instance).
+						// But here its just easier to always use the script instance.
+						// Obviously breaks once we support multiple scripts per entity.
+						referencedEntity = GetOrCreateScriptReferenceInstance(referencedId);
+					}
+				}
+
+				targetScript.Instance.SetFieldValue(scriptField, referencedEntity);
 			case .Component:
-				// We create a new instance of a component class
-				MonoType* type = scriptField.GetMonoType();
 				
-				SharpType sharpType = ScriptEngine.GetSharpType(type);
+				let sourceComponentReference = sourceScript.Instance.GetFieldValue<MonoObject*>(scriptField);
 				
-				var componentClass = ComponentClasses[sharpType.FullName];
+				MonoObject* componentInstance = sourceComponentReference;
 				
-				MonoObject* componentInstance = script.Instance.CreateComponentInstance(componentClass);
-				script.Instance.SetFieldValue(scriptField, componentInstance);
+				// Get or create entity reference
+				if (sourceComponentReference != null)
+				{
+					let idField = Mono.mono_class_get_field_from_name(s_EngineObject._monoClass, "_uuid");
+					UUID sourceId = s_EntityRoot.GetFieldValue<UUID>(sourceComponentReference, idField);
+					
+					MonoType* fieldMonoType = scriptField.GetMonoType();
+
+					SharpType componentType = ScriptEngine.GetSharpType(fieldMonoType);
+
+					var componentClass = ComponentClasses[componentType.FullName];
+
+					if (sourceIdToTargetId.TryGetValue(sourceId, let targetId))
+					{
+						// Create reference for translated id
+						componentInstance = CreateComponentReferenceInstance(componentClass, targetId);
+					}
+					
+					componentType.ReleaseRef();
+				}
+				
+				targetScript.Instance.SetFieldValue(scriptField, componentInstance);
 
-				sharpType.ReleaseRef();
 			default:
-				script.Instance.SetFieldValue(scriptField, field._data);
+				targetScript.Instance.CopyFieldValue(scriptField, sourceScript.Instance);
 			}
 		}
 	}
 
 	private static MonoAssembly* LoadCSharpAssembly(StringView assemblyPath, bool loadPDB = false)
 	{
+		Debug.Profiler.ProfileFunction!();
+
 		List<uint8> data = new List<uint8>(1024);
 
 		File.ReadAll(assemblyPath, data);

GlitchyEngine/src/Scripting/ScriptInstance.bf

@@ -114,6 +114,13 @@ class ScriptInstance : RefCounter
 		_scriptClass.SetFieldValue<T>(_instance, field.[Friend]_monoField, value);
 	}
 
+	public void CopyFieldValue(ScriptField field, ScriptInstance sourceInstance)
+	{
+		// TODO: I hate this!
+		var data = sourceInstance.GetFieldValue<uint8[sizeof(GlitchyEngine.Math.Matrix)]>(field);
+		SetFieldValue(field, data);
+	}
+
 	/// Creates a new instance of the given component class and initializes it for the current entity.
 	public MonoObject* CreateComponentInstance(ScriptClass componentClassType)
 	{

GlitchyEngine/src/World/Scene.bf

@@ -29,6 +29,8 @@ namespace GlitchyEngine.World
 		// Maps ids to the entities they represent.
 		private Dictionary<UUID, EcsEntity> _idToEntity = new .() ~ delete _;
 
+		private HashSet<EcsEntity> _updateBlockList = new .() ~ delete _;
+
 		public Entity ActiveCamera => {
 			Entity cameraEntity = .();
 
@@ -99,7 +101,7 @@ namespace GlitchyEngine.World
 
 			if (initializeScripts)
 			{
-				CopyComponents<NativeScriptComponent>(this, target);
+				//CopyComponents<NativeScriptComponent>(this, target);
 
 				// Copy ScriptComponents... needs extra handling for the script instances
 				for (let (sourceHandle, sourceComponent) in _ecsWorld.Enumerate<ScriptComponent>())
@@ -583,6 +585,8 @@ namespace GlitchyEngine.World
 
 			if (mode.HasFlag(.Scripts))
 			{
+				Debug.Profiler.ProfileScope!("Update scripts");
+
 				// Run scripts
 				for (var (entity, script) in _ecsWorld.Enumerate<NativeScriptComponent>())
 				{
@@ -595,12 +599,9 @@ namespace GlitchyEngine.World
 	
 					script.Instance.[Friend]OnUpdate(gameTime);
 				}
-			/*}
 
-			if (mode.HasFlag(.Runtime) || mode.HasFlag(.Editor))
-			{*/
 				// Run scripts
-				for (var (entity, script) in _ecsWorld.Enumerate<ScriptComponent>())
+				for (let (entity, script) in _ecsWorld.Enumerate<ScriptComponent>())
 				{
 					if (!script.IsCreated)
 					{
@@ -615,9 +616,14 @@ namespace GlitchyEngine.World
 					}
 					
 					if (mode.HasFlag(.Runtime))
+					{
+						if (_updateBlockList.Contains(entity))
+							_updateBlockList.Remove(entity);
+						else
 							script.Instance.InvokeOnUpdate(gameTime.DeltaTime);
 					}
 				}
+			}
 
 			/*if (mode.HasFlag(.Editor))
 			{
@@ -761,11 +767,50 @@ namespace GlitchyEngine.World
 		 */
 		public Entity CreateInstance(Entity entity)
 		{
+			Log.EngineLogger.Info("Ja moin");
+
+			List<Entity> newEntities = scope .();
+			Dictionary<EcsEntity, EcsEntity> sourceToTargetEntity = scope .();
+			Dictionary<UUID, UUID> sourceIdToTargetId = scope .();
+			Dictionary<UUID, Entity> targetIdToSourceEntity = scope .();
+			
 			Entity CopyEntityAndChildren(Entity original)
 			{
 				Entity copy = CreateEntity(original.Name);
 
-				// TODO: Copy components
+				newEntities.Add(copy);
+				sourceToTargetEntity.Add(original.Handle, copy.Handle);
+				sourceIdToTargetId.Add(original.UUID, copy.UUID);
+				targetIdToSourceEntity.Add(copy.UUID, original);
+				_updateBlockList.Add(copy.Handle);
+
+				CopyComponent<MeshRendererComponent>(original, copy);
+				CopyComponent<MeshComponent>(original, copy);
+				CopyComponent<EditorComponent>(original, copy);
+				CopyComponent<SpriteRendererComponent>(original, copy);
+				CopyComponent<CircleRendererComponent>(original, copy);
+				CopyComponent<CameraComponent>(original, copy);
+				CopyComponent<LightComponent>(original, copy);
+
+				CopyComponent<Rigidbody2DComponent>(original, copy);
+				CopyComponent<BoxCollider2DComponent>(original, copy);
+				CopyComponent<CircleCollider2DComponent>(original, copy);
+				CopyComponent<PolygonCollider2DComponent>(original, copy);
+				
+				// Copy ScriptComponent... needs extra handling for the script instances
+				if (original.TryGetComponent<ScriptComponent>(let sourceScript))
+				{
+					ScriptComponent* targetScript = copy.AddComponent<ScriptComponent>();
+					
+					targetScript.ScriptClassName = sourceScript.ScriptClassName;
+
+					// Initializes the created instance
+					// TODO: this returns false, if no script with ScriptClassName exists, we have to handle this case correctly I think.
+					ScriptEngine.InitializeInstance(copy, targetScript);
+
+					// TODO: Copy Data from one instance to another
+					//ScriptEngine.CopyFieldsToInstance(targetScript, sourceScript);
+				}
 
 				// This is kinda slow because it's in O(n*m) where n is the tree depth and m is the total number of entities in the scene...
 				for (let child in original.EnumerateChildren)
@@ -779,6 +824,22 @@ namespace GlitchyEngine.World
 
 			Entity newEntity = CopyEntityAndChildren(entity);
 			
+			for (let copy in newEntities)
+			{
+				if (copy.TryGetComponent<ScriptComponent>(let targetScript))
+				{
+					Entity originalEntity = targetIdToSourceEntity[copy.UUID];
+
+					if (!originalEntity.TryGetComponent<ScriptComponent>(let sourceScript))
+						continue;
+
+					ScriptEngine.CopyFieldsToInstance(targetScript, sourceScript, sourceIdToTargetId);
+
+					//targetScript.Instance.InvokeOnCreate();
+				}
+			}
+
+
 			return newEntity;
 		}
 

ScriptCore/Components/Component.cs

@@ -2,7 +2,7 @@ using GlitchyEngine.Core;
 
 namespace GlitchyEngine;
 
-public abstract class Component
+public abstract class Component : EngineObject
 {
-    public Entity Entity { get; internal set; }
+    public Entity Entity => new(_uuid);
 }

ScriptCore/Components/RigidBody2D.cs

@@ -14,7 +14,7 @@ public class Rigidbody2D : Component
     /// <param name="wakeUp">Wake up the body</param>
     public void ApplyForce(float2 force, float2 point, bool wakeUp = true)
     {
-        ScriptGlue.Rigidbody2D_ApplyForce(Entity._uuid, force, point, wakeUp);
+        ScriptGlue.Rigidbody2D_ApplyForce(_uuid, force, point, wakeUp);
     }
 
     /// <summary>
@@ -25,7 +25,7 @@ public class Rigidbody2D : Component
     /// <param name="wakeUp">Wake up the body</param>
     public void ApplyForceToCenter(float2 force, bool wakeUp = true)
     {
-        ScriptGlue.Rigidbody2D_ApplyForceToCenter(Entity._uuid, force, wakeUp);
+        ScriptGlue.Rigidbody2D_ApplyForceToCenter(_uuid, force, wakeUp);
     }
     
     /// <summary>
@@ -35,11 +35,11 @@ public class Rigidbody2D : Component
     {
         get
         {
-            ScriptGlue.Rigidbody2D_GetPosition(Entity._uuid, out float2 position);
+            ScriptGlue.Rigidbody2D_GetPosition(_uuid, out float2 position);
 
             return position;
         }
-        set => ScriptGlue.Rigidbody2D_SetPosition(Entity._uuid, value);
+        set => ScriptGlue.Rigidbody2D_SetPosition(_uuid, value);
     }
     
     /// <summary>
@@ -49,11 +49,11 @@ public class Rigidbody2D : Component
     {
         get
         {
-            ScriptGlue.Rigidbody2D_GetRotation(Entity._uuid, out float rotation);
+            ScriptGlue.Rigidbody2D_GetRotation(_uuid, out float rotation);
 
             return rotation;
         }
-        set => ScriptGlue.Rigidbody2D_SetRotation(Entity._uuid, value);
+        set => ScriptGlue.Rigidbody2D_SetRotation(_uuid, value);
     }
     
     /// <summary>
@@ -63,11 +63,11 @@ public class Rigidbody2D : Component
     {
         get
         {
-            ScriptGlue.Rigidbody2D_GetLinearVelocity(Entity._uuid, out float2 velocity);
+            ScriptGlue.Rigidbody2D_GetLinearVelocity(_uuid, out float2 velocity);
 
             return velocity;
         }
-        set => ScriptGlue.Rigidbody2D_SetLinearVelocity(Entity._uuid, value);
+        set => ScriptGlue.Rigidbody2D_SetLinearVelocity(_uuid, value);
     }
     
     /// <summary>
@@ -77,10 +77,10 @@ public class Rigidbody2D : Component
     {
         get
         {
-            ScriptGlue.Rigidbody2D_GetAngularVelocity(Entity._uuid, out float velocity);
+            ScriptGlue.Rigidbody2D_GetAngularVelocity(_uuid, out float velocity);
 
             return velocity;
         }
-        set => ScriptGlue.Rigidbody2D_SetAngularVelocity(Entity._uuid, value);
+        set => ScriptGlue.Rigidbody2D_SetAngularVelocity(_uuid, value);
     }
 }

ScriptCore/Entity.cs

@@ -72,7 +72,7 @@ public class Entity : EngineObject
         {
             return new T
             {
-                Entity = this
+                _uuid = _uuid
             };
         }
 
@@ -111,7 +111,7 @@ public class Entity : EngineObject
 
         return new T
         {
-            Entity = this
+            _uuid = _uuid
         };
     }
 
@@ -132,7 +132,9 @@ public class Entity : EngineObject
 
         Component component = Activator.CreateInstance(componentType) as Component;
         if (component != null)
-            component.Entity = this;
+        {
+            component._uuid = _uuid;
+        }
 
         return component;
     }
@@ -160,7 +162,7 @@ public class Entity : EngineObject
         foreach ((Type componentType, int index) in componentTypes.WithIndex())
         {
             components[index] = Activator.CreateInstance(componentType) as Component;
-            components[index].Entity = this;
+            components[index]._uuid = _uuid;
         }
 
         return components;
@@ -176,7 +178,7 @@ public class Entity : EngineObject
     {
         ScriptGlue.Entity_AddComponents(_uuid, new []{typeof(T1), typeof(T2)});
 
-        return (new T1 { Entity = this }, new T2 { Entity = this });
+        return (new T1 { _uuid = _uuid }, new T2 { _uuid = _uuid });
     }
 
     /// <summary>
@@ -190,7 +192,7 @@ public class Entity : EngineObject
     {
         ScriptGlue.Entity_AddComponents(_uuid, new []{typeof(T1), typeof(T2), typeof(T3)});
 
-        return (new T1 { Entity = this }, new T2 { Entity = this }, new T3 { Entity = this });
+        return (new T1 { _uuid = _uuid }, new T2 { _uuid = _uuid }, new T3 { _uuid = _uuid });
     }
 
     #endregion Add Components

ScriptCore/Physics/Collision2D.cs

@@ -26,10 +26,10 @@ public struct Collision2D
     /// Gets the rigidbody whose Collider takes part in the collision.
     /// This Rigidbody is either a component of the entity whose script instance received the event or a parent of it.
     /// </summary>
-    public Rigidbody2D Rigidbody => new() { Entity = Entity };
+    public Rigidbody2D Rigidbody => new() { _uuid = _entity };
 
     /// <summary>
     /// Gets the other rigidbody whose Collider takes part in the collision.
     /// </summary>
-    public Rigidbody2D OtherRigidbody => new() { Entity = OtherEntity };
+    public Rigidbody2D OtherRigidbody => new() { _uuid = _otherEntity };
 }