Flappy

Implementation of some kind of flappy-bird game. Primary point of this is to showcase how to use OCaml and its existing libraries, to write powerful but simple code with an Elm-like structure. See flap.ml for the game-code.

Temporary download link for compiled code

https://mega.nz/#!5hNTWYZS!Y-8iWdkB8bcFnuo4y1GlqIbYxDgzByXKB7EtWAkj_Lk

Updates

Made code more typesafe using subtyping with polymorphic variants
Other birds can now revive a fallen bird by flying into feathers
Begun drawing own assets
Added local multiplayer
Added smoot multi-directional vector-based movement
Added homing dogs
...

Goals

Elm-like code using frp (react) + typesafe html (tyxml) + virtual DOM (reactiveData + tyxml_js).
- Simple
- Typesafe + functional - at least concerning the body of the application
- Minimal direct usage of js-bindings.
- Visualization code separated from game-model update.
Avoid frameworks, use libraries only.
Coming up with an elegant solution to identity of object-related problems. E.g. homing missiles.
- Having some way to calculate who the referenced entity is from the data is fine for homing missiles. Depends on what one wants to do.
Composability of 'components'
- Is the Virtual DOM part of the code effectively composeable, when having nested reactive nodes?
  - If not, maybe use Janestreets Incr_dom - not compatible with react?

Non-goals:

Effective visualization
Interesting gameplay

How to fly

git clone the repository.
See the needed dependencies in the _tags file - use opam to install them.
Run ./compile.sh which generates an webout/index.html and webout/flap.js.
Open webout/index.html in your favorite browser
Use w/a/s/d + i/j/k/l + arrow-keys to fly (depending on the value of players in flap.ml)

cannadayr / flappy