Draft of Bevy 101 - ECS 부터 itch.io 배포까지

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

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+---
+title: "Bevy 101 - ECS 부터 itch.io 배포까지"
+date: "2024-08-18"
+tags: ["marsettler", "rust", "bevy", "game", "itchio", "github"]
+layout: "slide"
+draft: true
+---
+
+# Bevy 101 - ECS 부터 itch.io 배포까지
+
+---
+
+## 목차
+
+- Bevy
+- Bevy ECS
+- itch.io
+- itch.io 배포
+
+---
+
+## Bevy
+
+- A refreshingly simple data-driven game engine built in Rust
+- Free and Open Source Forever!
+
+https://bevyengine.org/
+
+---
+
+### Data Driven
+
+All engine and game logic uses Bevy ECS, a custom Entity Component System
+
+- Fast: Massively Parallel and Cache-Friendly. The fastest ECS according to some benchmarks
+- Simple: Components are Rust structs, Systems are Rust functions
+- Capable: Queries, Global Resources, Local Resources, Change Detection, Lock-Free Parallel Scheduler
+
+---
+
+```rust
+#[derive(Component)]
+struct Player;
+
+fn system(
+    q: Query<(Entity, &Player)>
+) {
+}
+```
+
+---
+
+## 일반적인 ECS
+
+[Entity component system](https://en.wikipedia.org/wiki/Entity_component_system)
+
+---
+
+[Go 1.18 Generic으로 만들어본 ECS 시스템 (공봉식님)](https://www.youtube.com/watch?v=FylHURMCpPU&t=410s)
+
+MVC 패턴과 비슷한 것 같기도 하지만
+
+디커플링이 목적이 아니라
+
+### 성능 향상이 목적
+
+---
+
+## Bevy ECS
+
+- https://github.com/bevyengine/bevy/tree/main/crates/bevy_ecs
+
+---
+
+[Build Your First Game in Bevy and Rust - Step by Step Tutorial](https://youtu.be/E9SzRc9HkOg)
+
+OOP vs ECS
+
+---
+
+### OOP
+
+```csharp
+class Entity: Object {
+    public int id;
+    public Vector3 position;
+    public Vector3 velocity;
+
+    public void applyVelocity(float dt) {
+        position += velocity * dt;
+    }
+}
+```
+
+---
+
+### ECS
+
+``` rust
+// Entity
+struct Entity {
+    id: i32,
+}
+
+// Component
+struct Transform {
+    position: Vec3,
+}
+
+// System
+fn velocity_system(
+    query: Query<(&mut Transform, &Velocity)>) {
+}
+```
+
+---
+
+## 다른 엔진의 ECS 활용
+
+--- 
+
+- [ECS for Unity](https://unity.com/ecs)
+
+- [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.
+
+---
+
+## itch.io
+
+itch.io is an open marketplace for independent digital creators with a focus on independent video games.
+
+https://itch.io/docs/general/about
+
+---
+
+## itch.io 배포 with bevy
+
+https://github.com/hueypark/marsettler/blob/b0a93930b057b9c9141b36dd8d9c891c275da456/.github/workflows/release.yaml
+
+## GitHub Actions workflow
+
+1. Checkout code
+
+```
+- name: Checkout code
+  uses: actions/checkout@v4
+```