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![Ownership
10
let v = vec![1, 2, 3];
let v2 = v;
v.push(4) // compile error !](https://image.slidesharecdn.com/amethyst-201025135240/75/Make-A-Shoot-Em-Up-Game-with-Amethyst-Framework-10-2048.jpg)
![Borrow Checker
11
fn foo(v: &Vec<i32>) {
v.push(5);
}
let v = vec![];
foo(&v); // compile Error
v.push(10);](https://image.slidesharecdn.com/amethyst-201025135240/75/Make-A-Shoot-Em-Up-Game-with-Amethyst-Framework-11-2048.jpg)
![Systems
32
Movement
System
Boundary
System
State Play
Control
System
Collision
System
let gamedata = GameDataBuilder::default()
.with(ControlSystem, "control", &[])
.with(MovementSystem, "movement", &["control"])
.with(BoundarySystem, "boundary", &["movement"])
.with(CollisionSystem, "collision", &["boundary"])](https://image.slidesharecdn.com/amethyst-201025135240/75/Make-A-Shoot-Em-Up-Game-with-Amethyst-Framework-32-2048.jpg)
![Rust with WebAssembly
40
Hello World in Rust for WASM
#[wasm_bindgen]
extern {
fn alert(s: &str);
}
#[wasm_bindgen]
pub fn greet() {
alert("Hello, wasm from Rust!");
}](https://image.slidesharecdn.com/amethyst-201025135240/75/Make-A-Shoot-Em-Up-Game-with-Amethyst-Framework-40-2048.jpg)
![Rust with WebAssembly
41
#[wasm_bindgen]
#[repr(u8)]
pub enum Cell { Dead = 0, Alive = 1, }
#[wasm_bindgen]
pub struct Universe {
width: u32, height: u32, cells: Vec<Cell>
}
// javascript
import { Universe } from "wasm-game-of-life";
const universe = Universe.new();](https://image.slidesharecdn.com/amethyst-201025135240/75/Make-A-Shoot-Em-Up-Game-with-Amethyst-Framework-41-2048.jpg)
Uploaded byYodalee
Make A Shoot ‘Em Up Game with Amethyst Framework
The document presents a tutorial on building a shoot 'em up game using the Amethyst game framework in Rust, covering Rust programming principles, Amethyst's entity-component-system (ECS) architecture, and integrating WebAssembly. It emphasizes Rust's safety features, the ECS model for game development, and provides insights into setting up systems and managing game states. Additionally, it discusses the performance advantages of using WebAssembly alongside Rust for game development.
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Make A Shoot ‘Em Up Game with Amethyst Framework
- 1. 使用 Amethyst 打造 遊戲 MakeA Shoot ‘Em Up Game with Amethyst Framework 葉闆 YODALEE <LC85301@GMAIL.COM> MOPCON 2020 1
- 2. About Me 葉闆(a.k.a YodaLee) Software Engineer Rustacean 2 @yodalee.me
- 3. Outline Demo Rust Rust/Amethyst ECS Rust and WebAssembly 3
- 4. Demo The mostdangerous thing in presentation. You can get source code below: 4
- 5.
- 6. What is Rust 6 Goal: a safer system language First version on 2010 Current stable version: 1.47 (10/08) Getting more popular
- 7. Property of Rust 7 Compiled, Static, LLVM backend Strong typed Zero-cost abstraction, no GC Personal perspective: C++ like Haskell
- 8. Property of Rust 8 Sharedand Mutable state is bad. C: Programmer is smart FP: No mutable Rust: No shared
- 9. Property of Rust 9 Ownership, Borrow Checker, Lifetime Either: 1 mutable reference to data Multiple immutable references to data
- 10. Ownership 10 let v =vec![1, 2, 3]; let v2 = v; v.push(4) // compile error !
- 11. Borrow Checker 11 fn foo(v:&Vec<i32>) { v.push(5); } let v = vec![]; foo(&v); // compile Error v.push(10);
- 12.
- 13. Real Project 13 Nom parser ripgrep actixweb Clap-rs
- 14.
- 15. What is Amethyst A game framework in Rust Learned from Are we game yet There are many others, like Piston, ggez, Bevy… 15
- 16. Why Amethyst 16 PureRust engine, not binding. ECS Still active Fun
- 17.
- 18.
- 19. What is ECS 19 Entity Container of components Component Properties of entity System Read and modify components
- 20.
- 21.
- 22.
- 23.
- 24.
- 25. Add Component 25 world .create_entity() // otherwith .with(Ship) .build() What is inside “Ship”
- 26. Add Component 26 world .create_entity() // otherwith .with(Ship) .with(Physical) .build() Physical Bullet Ship Asteroid
- 27. Add Component 27 world .create_entity() // otherwith .with(Collider { ColliderShip }) .build()
- 28. Entity Is Container PropertyComponent Position Transform Display Sprite Acceleration Ship Velocity/Rotation Physical Collision Collider 28
- 29.
- 30.
- 31.
- 32. Systems 32 Movement System Boundary System State Play Control System Collision System let gamedata= GameDataBuilder::default() .with(ControlSystem, "control", &[]) .with(MovementSystem, "movement", &["control"]) .with(BoundarySystem, "boundary", &["movement"]) .with(CollisionSystem, "collision", &["boundary"])
- 33. Event Channel Passdata between System Make system simpler 33 1. Detect collision 2. Delete bullet and asteroid 3. Create explosion 4. End game if asteroid hit ship Collision System
- 34. Event Channel 34 Detect collision Collision System Deletebullet and asteroid DeleteSystem Create Explosion ExplosionSystem End game if asteroid hit ship OverSystem Entity ColliderType
- 35.
- 36. Just a SimpleGame See others demo project: Space-menace Space-shooter Amethyst-2d-platformer-demo 36
- 37.
- 38. WebAssembly 38 “Assembly language”for web Higher performance than Javascript Support by Firefox, Chrome/Edge, Safari. C/C++ use emscripten Rust has target wasm32-unknown-unknown
- 39. Rust with WebAssembly 39 Rust toolchain: wasm-pack build Compile Rust project to: Project.wasm Project.js Project.d.ts Package.json
- 40. Rust with WebAssembly 40 Hello World in Rust for WASM #[wasm_bindgen] extern { fn alert(s: &str); } #[wasm_bindgen] pub fn greet() { alert("Hello, wasm from Rust!"); }
- 41. Rust with WebAssembly 41 #[wasm_bindgen] #[repr(u8)] pubenum Cell { Dead = 0, Alive = 1, } #[wasm_bindgen] pub struct Universe { width: u32, height: u32, cells: Vec<Cell> } // javascript import { Universe } from "wasm-game-of-life"; const universe = Universe.new();
- 42. Rust with WebAssembly 42 https://royaltm.github.io/rust-fractx- wasm-demo/ https://sandspiel.club/ Unfortunately, unavailable for amethyst, yet.
- 43. Takeaway 43 Rust isthe best programming language in the world Concept of ECS The ability of WebAssembly
- 44. Reference 44 Amethyst Doc Notmany document available : ( Rust and WebAssembly
- 45.