Actors

# ACTORS - Fast ECS (Entity Component System) Framework for Unity ACTORS is a complete game framework with multiscene editing, game object pooling, ECS and data-driven approach for game logic explicitly built for Unity. It is used to ease the pain of decoupling data from behaviors without tons of boilerplate code and unnecessary overhead. ### Requirements - Unity 2018 and higher ### How to Install #### From packages ( Preferable ) - Create a new Unity Project - Open the manifest.json file in the Packages folder inside of the Project - Add ```"com.pixeye.ecs": "https://github.com/dimmpixeye/actors.git",``` #### From Unity - Download from https://github.com/dimmpixeye/ecs/releases #### How To Update If you use packages you can automatically get fresh updates inside Unity editor! Press Tools->Actors->Update Framework[GIT] to get new update when needed. ## Documentation * [Examples](https://github.com/dimmpixeye/CryoshockMini) ( In progress ) * [Wiki](https://github.com/dimmpixeye/ecs/wiki) ( In progress ) ## Basic ### Components Components are data containers without logic. In ACTORS Framework components can be either classes or structs. You should decide carefully from the start of the project what kind of layout ( class or structure ) you want to use as the workflow slightly differs. > You can automatically create a component class/struct from a special template in Unity. > Project->Create->Actors->Generate->Component #### Class Components ```csharp sealed class ComponentHealth { public int val; public int valMax; } ``` #### Struct Components > To use struct components you need to add ```ACTORS_COMPONENTS_STRUCTS``` to Scripting Define Symbols in the Project Player Settings. ```csharp struct ComponentHealth { public int val; public int valMax; } ``` #### Component Helper Every component is generated with special helpers that are optional but makes your life way easier. If you don't use Unity for generating components, you can easily make a template in your IDE. Or type helpers manually. ```csharp static partial class component { // auxiliary excluding filter for entity groups public const string Health = "ComponentHealth"; // a shortcut to get compontent like this : entity.ComponentHealth(); public static ref ComponentHealth ComponentHealth(in this ent entity) => ref Storage.components[entity.id]; } sealed class StorageComponentHealth : Storage { // This is for performance. Adding new Component is much faster than new T(); public override ComponentHealth Create() => new ComponentHealth(); // Every time one or more components are removed from the entity the dispose method will run. // Use this method for cleanup and reverting settings of the component. public override void Dispose(indexes disposed) { foreach (var id in disposed) { ref var component = ref components[id]; component.val = 0; } } } ``` ### Entity Entity is an incremental ID that help accessing components. Entity is represented by ```ent``` structure. #### How to create entity ? ```csharp public void SomeMethod() { // Bare entity ent e = Entity.Create(); } ``` ___ Entities can hold information about unity objects as well! ```csharp public void SomeMethod() { // New entity with a new GO ( GameObject ). // The GO prefab will be taken from the Resources folder by string ID. ent e = Entity.Create("Obj Fluffy Unicorn"); // Access to the transform of Obj Fluffy Unicorn gameobject. e.transform.position = new Vector3(0,0,0) ; } ``` ___ ```csharp public GameObject prefabFluffyUnicorn; public void SomeMethod() { // New entity with a new GO ( GameObject ). // The GO will be created from the provided prefab. // The GO will be pooled. ent e = Entity.Create(prefabFluffyUnicorn, true); // Access to the transform of Obj Fluffy Unicorn gameobject. e.transform.position = new Vector3(0,0,0) ; } ``` ___ You can pool gameobject by adding ```true``` variable in the end of the method. ```csharp public void SomeMethod() { // New entity with a new GO ( GameObject ). // The GO prefab will be taken from the Resources folder by string ID. // The GO will be pooled. ent e = Entity.Create("Obj Fluffy Unicorn", true); // Access to the transform of Obj Fluffy Unicorn gameobject. e.transform.position = new Vector3(0,0,0) ; } ``` ___ #### How to add Components ? There are several ways to add components depending on the context of your code. In case you want to setup your new entity use ```Set``` Method. Use ```Set``` method only with newly created entities. ```csharp public void SomeMethod() { ent e = Entity.Create("Obj Bunny"); // Add components var cCute = e.Set(); var cJumping = e.Set(); var cConsumable = e.Set(); var cPoo = e.Set(); // Component Cute cCute.attractivness = float.PositiveInfinity; // Component Jumping cJumping.power = 100; } ``` Use ```Add``` method when you want to attach new component to already existed entity. ```csharp public void SomeMethod() { // where e is some entity. // Add components var cCute = e.Add(); var cJumping = e.Add(); var cConsumable = e.Add(); var cPoo = e.Add(); // Component Cute cCute.attractivness = float.PositiveInfinity; // Component Jumping cJumping.power = 100; } ``` The difference between Add and Set are in the operations that Framework must do to create this object. In the example above, the Framework needs to make 4 ```ADD``` operations, but in the case of the ```SET``` method, it will make only 1 operation. Use ```AddGet``` method when you unsure if entity has particular component. This method will check and add component if it doesn't exist. ```csharp public void SomeMethod() { // where e is some entity. // Add components var cCute = e.AddGet(); var cJumping = e.AddGet(); var cConsumable = e.AddGet(); var cPoo = e.AddGet(); // Component Cute cCute.attractivness = float.PositiveInfinity; // Component Jumping cJumping.power = 100; } ``` #### How to kill Entities? ```csharp // Create new entity with Obj Bunny prefab ent e = Entity.Create("Obj Bunny"); // Somewhere in the code e.Release(); ``` > If you create an entity with a GameObject, it will be destroyed as well. If the GameObject was marked as poolable, it will be deactivated and reused in the future. #### How to kill Entity without touching a GameObject? ```csharp // Create new entity with Obj Bunny prefab ent e = Entity.Create("Obj Bunny"); // Somewhere in the code e.Unbind(); ``` ### Processors Processors are systems in ACTORS framework. You execute game logic through systems. Custom processors must be inherited from a Processor class. ### Group Processors execute game logic through iterating groups. Groups are entities that are filtered by specific components. The same entity may lay in many groups. ```csharp sealed class ProcessorMove : Processor, ITick { // Define a group. The group is defined via Processor parent class Group groupMovables; // ITick interface Adds Tick method. It's an update with delta time. public void Tick(float delta) { // iteration through group foreach (ent entity in groupMovables) { var cMove = entity.ComponentMove(); var cPosition = entity.ComponentPosition(); // do some logic } } } ``` If you are going to use only one group in the processor you can take a slightly different approach. There is no difference except that you will type less. ```csharp // Define a group from the processor. The group defined in this way called source. sealed class ProcessorMove : Processor, ITick { // ITick interface Adds Tick method. It's an update with delta time. public void Tick(float delta) { // iteration through group foreach (ent entity in source) { var cMove = entity.ComponentMove(); var cPosition = entity.ComponentPosition(); // do some logic } } } ``` ### Group events You can make events for entities that were added or removed from the group. It's "similar" to Unity OnEnable and OnDisable logic. ```csharp sealed class ProcessorMove : Processor, ITick { // Define a group. The group is defined via Processor parent class Group groupMovables; // To work with events use method HandleEvents public override void HandleEvents() { // work with all entities that were removed to the group on the current frame foreach (ent entity in groupMovables.removed) { } // work with all entities that were added to the group on the current frame foreach (ent entity in groupMovables.added) { } } // ITick interface Adds Tick method. It's an update with delta time. public void Tick(float delta) { // iteration through group foreach (ent entity in groupMovables) { var cMove = entity.ComponentMove(); var cPosition = entity.ComponentPosition(); // do some logic } } } ``` ## Starters The Starter class is the entry point of a game scene. You define all your Processors and Scene dependecies there. How you define your processors matters for execution order. ```csharp // Inherit from Starter class sealed class StarterGame : Starter { // override Setup method. It's like Awake in Unity. protected override void Setup() { Add(); Add(); Add(); } } ``` ## Actors The Actor is a monobehavior class that allows communicating between unity game objects and framework. Most of the time you will inherit from Actors when defining new objects. The Actor class is for defining what is your Entity. You use Actors only to add some components to the Entity, to have a connection between Framework and Unity out of the box and for initial setup of the object. You can use it as _view_ class if you like MVC patterns. ### How to create an Actor ```csharp public class ActorModuleReactor : Actor { // use the FoldoutGroup attribute to decorate components nicely // in groups in the Unity Inspector [FoldoutGroup("Setup")] public ComponentStateMachine componentStateMachine; [FoldoutGroup("Setup")] public ComponentRecycle componentRecycle; // Use setup method to define Actor. protected override void Setup() { // add your components to the Entity of the Actor entity.Set(componentStateMachine); entity.Set(componentRecycle); // add a component by its type. entity.Set; } } ``` [![Actor in the Inspector](https://camo.githubusercontent.com/5777b2c3e4b84732373afe317b9d98aefd411565/68747470733a2f2f692e6779617a6f2e636f6d2f32626464303138353366346466383264336464663665386630363234316231662e676966)](https://gyazo.com/2bdd01853f4df82d3ddf6e8f06241b1f)