![Rust Toronto Meetup 2017
References 22
Design Patterns Revisited – State Pattern. (2009). [Drawing of pushdown
automaton]. Game Programming Patterns. Retrieved from
http://gameprogrammingpatterns.com/images/state-pushdown.png
Wikimedia Commons. (2015). [Wyoming Night Sky]. Retrieved from
https://commons.wikimedia.org/wiki/File:February_-conservationlands
15_Social_Media_Takeover-_Top_15_Places_on_National_Conservation_La
nds_for_Night_Sky_Viewing_(16358792937).jpg](https://image.slidesharecdn.com/amethyst-pastpresentfuture-171117182125/85/Amethyst-Past-Present-Future-22-320.jpg)
Amethyst: Past, Present, Future
- 1. Amethyst: Past, Present, & Future Eyal Kalderon @ebkalderon Rust Toronto Meetup 2017
- 2. Preview What is Amethyst? Brief History Current State Future Plans Rust Toronto Meetup 2017 2
- 4. An Intuitive Game Engine Data-oriented Data-driven Free and open source (MIT/Apache) Written in Rust with ♥ Rust Toronto Meetup 2017
- 5. Rust Toronto Meetup 2017 Data-oriented Programming paradigm Storing data compactly and exploiting modern hardware to process it efficiently Lends itself well to pipelining, modularity, and massive parallelism (task or data) Data-driven Software design style Critical logic defined in data rather than in compiled code Hot-reloading, instant feedback Orthogonal concept to data- orientation 5
- 6. Rust Toronto Meetup 2017 Features Easy game state management Pushdown automaton (FSM with memory) Transition between screens or gameplay modes Entity-component-system (ECS) model Specs provides a scalable parallel framework Extensible 3D rendering system Supports custom graphical passes Direct3D 11 and OpenGL backends via gfx-rs Presented as cohesive unit, subcrates are also usable 6
- 7. Rust Toronto Meetup 2017 Pushdown Automata 7 Source: Game Programming Patterns
- 8. Rust Toronto Meetup 2017 Pushdown Automata 8 Intro Menu Playing Cutscene PausedOptions YouLost YouWon
- 10. 10 Rust Toronto Meetup 2017 History Born 13th Jan 2016 First commit 20th Dec 2015 Personal toy project Practice Rust 1.0 Used Dark GDK, Unity, Unreal Inspired by Bitsquid (Stingray) Catching steam around Feb 2016 GitHub organization Mar 2016
- 11. 11 Rust Toronto Meetup 2017 Initially intense discussion and design Renderer prototyped 4th Apr 2016 Specs parallel ECS Born 5th Apr 2016 Separate project Co-evolved alongside Amethyst iter_mut(), iter_mut(), iter_mut() History
- 13. Rust Toronto Meetup 2017 Current State 13 Growing rapidly, high code churn Core features present: State machine, ECS, rendering, configuration (YAML) Notably missing: Audio, GUI, physics, tooling, entity definition (YAML) Proof of concept Pong clone Documentation available, but sorely out of date Greater test coverage and benchmarks would be nice
- 14. Rust Toronto Meetup 2017 API Example pub struct HelloWorld; impl State for HelloWorld { fn on_start(&mut self, eng: &mut Engine) { println!("Starting up..."); } fn update(&mut self, eng: &mut Engine) -> Trans { println!("Playing!"); Trans::Quit } fn on_stop(&mut self, eng: &mut Engine) { println!("Shutting down..."); } } 14
- 15. Future Plans
- 16. Rust Toronto Meetup 2017 More Parallelism 16 Asset management is being reworked (#244) Cleaner API Asynchronous and parallel loading using futures Renderer is undergoing rewrite (#233) More data-driven Parallel rendering Build pipeline state objects at runtime Collaborating more closely with gfx-rs Specs, asset manager, and renderer all share threadpool
- 17. Rust Toronto Meetup 2017 User Experience 17 Embedded scripting language support Possibilities: mruby, Lua, Dyon, Javascript, others Hot-reloading of Rust code, scripts, and assets Improve tooling situation Traditional “mega-editor” split into several small command-line tools, scriptable Editor is merely a frontend to these utilities Compile shaders, generate mipmaps, and compress assets when building in release mode
- 18. Rust Toronto Meetup 2017 Determinism 18 Many cool improvements to be made here! Recording and playback of in-engine demos Think Quake-style demos, compact text files Store RNG seeds, initial world state, player inputs Frame-by-frame rewind and fast-forward Multiplayer becomes a networked extension of demos Tool slaving, network transparency Simulate on development PC, preview and profile game on mobile/consoles, etc. over USB or network
- 20. Rust Toronto Meetup 2017 Links Getting involved https://www.amethyst.rs https://github.com/amethyst/amethyst https://gitter.com/amethyst/rooms Further reading https://bitsquid.blogspot.com/ http://gamedevs.org/uploads/benefits-of-a-data-driven-renderer.pdf http://gamedevs.org/uploads/flexible-rendering-multiple-platforms.pdf https://torkleyy.github.io/blog/amethyst-assets/ 20
- 22. Rust Toronto Meetup 2017 References 22 Design Patterns Revisited – State Pattern. (2009). [Drawing of pushdown automaton]. Game Programming Patterns. Retrieved from http://gameprogrammingpatterns.com/images/state-pushdown.png Wikimedia Commons. (2015). [Wyoming Night Sky]. Retrieved from https://commons.wikimedia.org/wiki/File:February_-conservationlands 15_Social_Media_Takeover-_Top_15_Places_on_National_Conservation_La nds_for_Night_Sky_Viewing_(16358792937).jpg