Asteroids 1979 arcade game engine written in Elixir. Watch the Elixoids movie on Vimeo recorded at a Coding Night. Participants were given one hour to write an AI bot that could pilot a ship and play the game! See the original Arcade Asteroids video.
The original UI was rendered by JavaScript asteroids-ui and has had a recent Elm conversion. Audio originall provided by SonicAsteroids before conversion to Web Audio.
To run the game on Ubuntu, or on OSX:
brew install elixir
git clone https://github.com/devstopfix/elixoids.git
cd elixoids
mix deps.get
This repo contains the game engine, a webserver, and a recent version of the asteroids-ui.
To start a game use the play script or:
mix run --no-halt
Open the UI in your browser:
open http://localhost:8065/0/game
In the REPL you can start multiple games on the same server:
iex -S mix
{:ok, pid, id} = Elixoids.Game.Supervisor.start_game([asteroids: 16])
{:ok, #PID<0.538.0>, 2}
open http://localhost:8065/2/game
python3 clients/miner.py --name TWO --game 2The parameters of the game can be alterted in the config.
Clients subscribe to an event stream from the game via Websockets. The resources available are:
| Path | Accept | Content |
|---|---|---|
/0/graphics |
application/json | Graphics stream |
/0/news |
text/event-stream | News stream |
/0/ship/PLY |
application/json | Game state for player PLY |
The news stream at http://example.com/0/news is a stream of text lines of the form:
[PLY|ASTEROID] VERB [PLY|ASTEROID]
Example dialogue:
$ curl -H 'Accept: text/event-stream' http://localhost:8065/0/news 2>&1
PLY fires
PLY shot ASTEROID
PLY fires
PLY shot OTH
PLY kills OTH
ASTEROID hit PLY
ASTEROID spottedThis can be used to generate a hi-score table:
elixir --no-halt clients/hiscore.exs http://localhost:8065/0/news
See Elixoids Java Client by J Rothwell.
The CBDR Python client at miner.py will try and shoot the asteroid which is on the most constant bearing with it:
pip3 install websocket-client --user
python3 clients/miner.py --host localhost:8065 --name MCB
There is a simple Ruby client that shoots the nearest ship:
gem install eventmachine
gem install faye-websocket
export ELIXOIDS_SERVER=rocks.example.com:8065 ruby clients/shoot_nearest_ship.rb
NB The websocket connection can be troublesome on OSX. It will often fail to connect after a reboot. Keep trying and it will eventually connect and stay connected! These scripts will be migrated to Python3.
Graphics stream can be received at ws://example.com/0/graphics - to be documented - see GraphicsDecoder.elm and asteroids-ui for reference implementations.
While developing the UI you can start a test card game that allows you to prove your rendering:
mix run --no-halt games/testcard.exs
Then connect to ws://localhost:8065/1/game.
See the Ubuntu deployment guide to run the game engine on a server.
This software is published under the MIT License and Copyright ©2019 devstopfix. UI is ©2016 lachok. Audio code is ©2016 jrothwell. Button CSS by ozer.