Update a Bevy 101 - ECS 부터 itch.io 배포까지

content/marsettler/bevy-101-from-ecs-to-itch-io-deployment.md

@@ -28,6 +28,18 @@ https://bevyengine.org/
 
 ---
 
+- Data Driven
+- 2D, 3D Renderer, Render Graph, Animation
+- Cross Platform
+- Bevy UI
+- Scenes
+- Sound
+- Hot Reloading
+- Productive Compile Times
+- Free and Open Source
+
+---
+
 ### Data Driven
 
 All engine and game logic uses Bevy ECS, a custom Entity Component System
@@ -48,31 +60,148 @@ fn system(
 }
 ```
 
+Bevy Component 와 System
+
+일단 넘어가겠습니다.
+
+---
+
+## Bevy Hello World
+
+```rust
+use bevy::prelude::*;
+
+fn main() {
+    App::new()
+        .add_systems(Startup, hello_world)
+        .run();
+}
+
+fn hello_world() {
+    println!("Hello World!");
+}
+```
+
+---
+
+## Bevy ECS
+
 ---
 
 ## 일반적인 ECS
 
-[Entity component system](https://en.wikipedia.org/wiki/Entity_component_system)
+---
+
+## [Entity component system in wikipedia](https://en.wikipedia.org/wiki/Entity_component_system)
+
+> Entity–component–system (ECS) is a software architectural pattern mostly used in video game development for the representation of game world objects.
+>
+> An ECS comprises entities composed from components of data, with systems which operate on the components.
 
 ---
 
-[Go 1.18 Generic으로 만들어본 ECS 시스템 (공봉식님)](https://www.youtube.com/watch?v=FylHURMCpPU&t=410s)
+## [Go 1.18 Generic으로 만들어본 ECS 시스템](https://www.youtube.com/watch?v=FylHURMCpPU&t=410s)
 
 MVC 패턴과 비슷한 것 같기도 하지만
 
 디커플링이 목적이 아니라
 
-### 성능 향상이 목적
+**성능 향상이 목적**
 
 ---
 
-## Bevy ECS
+## [Bevy ECS](https://github.com/bevyengine/bevy/tree/main/crates/bevy_ecs)
 
-- https://github.com/bevyengine/bevy/tree/main/crates/bevy_ecs
+### What is Bevy ECS?
+
+> Bevy ECS is an Entity Component System custom-built for the Bevy game engine.
+>
+> It aims to be simple to use, ergonomic, fast, massively parallel, opinionated, and featureful.
+>
+> It was created specifically for Bevy's needs, but it can easily be used as a standalone crate in other projects
+
+---
+
+### ECS
+
+> All app logic in Bevy uses the Entity Component System paradigm, which is often shortened to ECS.
+> 
+> ECS is a software pattern that involves breaking your program up into Entities, Components, and Systems.
+>
+> Entities are unique "things" that are assigned groups of Components, which are then processed using Systems.
 
 ---
 
-[Build Your First Game in Bevy and Rust - Step by Step Tutorial](https://youtu.be/E9SzRc9HkOg)
+### Concepts
+
+---
+
+#### Components
+
+> Components are normal Rust structs.
+>
+> They are data stored in a World and specific instances of Components correlate to Entities.
+
+```rust
+use bevy_ecs::prelude::*;
+
+#[derive(Component)]
+struct Position { x: f32, y: f32 }
+```
+
+---
+
+#### Entities
+
+> Entities are unique identifiers that correlate to zero or more Components.
+
+```rust
+use bevy_ecs::prelude::*;
+
+#[derive(Component)]
+struct Position { x: f32, y: f32 }
+
+#[derive(Component)]
+struct Velocity { x: f32, y: f32 }
+
+let mut world = World::new();
+
+let entity_id = world
+    .spawn((Position { x: 0.0, y: 0.0 }, Velocity { x: 1.0, y: 0.0 }))
+    .id();
+
+let entity_ref = world.entity(entity_id);
+let position = entity_ref.get::<Position>().unwrap();
+let velocity = entity_ref.get::<Velocity>().unwrap();
+```
+
+---
+
+#### Systems
+
+> Systems are normal Rust functions.
+>
+> Thanks to the Rust type system, Bevy ECS can use function parameter types to determine what data needs to be sent to the system.
+>
+> It also uses this "data access" information to determine what Systems can run in parallel with each other.
+
+```rust
+use bevy_ecs::prelude::*;
+
+#[derive(Component)]
+struct Position { x: f32, y: f32 }
+
+fn print_position(query: Query<(Entity, &Position)>) {
+    for (entity, position) in &query {
+        println!("Entity {:?} is at position: x {}, y {}", entity, position.x, position.y);
+    }
+}
+```
+
+
+---
+
+## [Build Your First Game in Bevy and Rust - Step by Step Tutorial](https://youtu.be/E9SzRc9HkOg)
 
 OOP vs ECS
 
@@ -117,24 +246,61 @@ fn velocity_system(
 
 ## 다른 엔진의 ECS 활용
 
---- 
+---
+
+### Unity
 
 - [ECS for Unity](https://unity.com/ecs)
+- [[ECS/DOTS #2] Unity ECS로 속도 향상, 캐릭터 5000개 만들어 보기](https://youtu.be/LVjb_fQs2J8)
+
+---
+
+### Unreal Engine
 
 - [Engine Level ECS System Needed](https://forums.unrealengine.com/t/engine-level-ecs-system-needed/499939/2)
 
-> TL;DR Unreal does take benefit of CPU threads. It does already uses ECS where it makes sense, instead of forcing everyone to some trend.
+> TL;DR Unreal does take benefit of CPU threads.
+> 
+> It does already uses ECS where it makes sense, instead of forcing everyone to some trend.
+
+---
+
+## 자 이제 Bevy 로 게임을 만들었습니다.
+
+## 그 다음은? 배포!
+
+---
+
+## 주요 고려사항
+
+1. 사용자에게 가깝다. 
+2. 쉽게 사용할 수 있다.
+3. 개발자의 노력이 적다.
+
+---
+
+- Google Play
+- App Store
+- Steam
+- 자체 배포
+- ...
 
 ---
 
 ## itch.io
 
-itch.io is an open marketplace for independent digital creators with a focus on independent video games.
+> itch.io is an open marketplace for independent digital creators with a focus on independent video games.
 
 https://itch.io/docs/general/about
 
 ---
 
+## Snake v2
+
+https://hueypark.itch.io/snake-v2
+
+---
+
 ## itch.io 배포 with bevy
 
 https://github.com/hueypark/marsettler/blob/b0a93930b057b9c9141b36dd8d9c891c275da456/.github/workflows/release.yaml
@@ -146,4 +312,10 @@ https://github.com/hueypark/marsettler/blob/b0a93930b057b9c9141b36dd8d9c891c275d
 ```
 - name: Checkout code
   uses: actions/checkout@v4
-```
+```
+
+## 참고자료
+
+- [Go 1.18 Generic으로 만들어본 ECS 시스템 (공봉식님)](https://www.youtube.com/watch?v=FylHURMCpPU&t=410s)
+- [Bevy ECS](https://github.com/bevyengine/bevy/tree/main/crates/bevy_ecs)
+- [Bevy Quickstart](https://github.com/TheBevyFlock/bevy_quickstart)