# [*H Y L O G E N*](https://hylogen.com)
Hylogen is a purely functional language [embedded in Haskell](https://wiki.haskell.org/Embedded_domain_specific_language) for live-coding fragment shaders, featuring:
- a simple and pure syntax
- standard operators (`+`, `*`, [`*^`, `<.>`](https://hackage.haskell.org/package/vector-space))
- compat. w/ your fav haskell goodies (higher-order functions, ADTS, swanky polymorphism).
It comes with `hyde`, an accompanying rendering environment featuring:
- *hot-reloading*
- audio-reactive primitives
- texture backbuffering
## Install
```
cabal update
cabal install hylogen
```
This will install the hylogen package and `hyde`, the rendering environment.
## Usage
```haskell
-- ./Main.hs
module Main where
import Hylogen.WithHyde
color = vec4 (a, a, a, 1)
where
a = cos(X uvN * sin(time/ 10) * 10 + X mouse)
+ sin(Y uvN * sin(time / 10) * 10 + Y mouse)
main = putStrLn . toGLSL $ color
```
#### 1. run hyde...
```
hyde Main.hs
```
#### 2. ... live-code!
Go to [localhost:5678](http://localhost:5678) in your browser.
You will now see your changes to `Main.hs` propagate to your WebGL rendering environment!
## References
- [The_Force](https://github.com/shawnlawson/The_Force) by Shawn Lawson. Live-coding audio-reactive shaders!
- [Type-Safe Observable Sharing](https://pdfs.semanticscholar.org/4838/bd0a91b3058b467fa31ad9e0810121b46388.pdf) by Andy Gill. [`data-reify`](https://hackage.haskell.org/package/data-reify) made compile times combinatorially faster!
## Resources
- [hackage](https://hackage.haskell.org/package/hylogen)
- [examples](https://github.com/sleexyz/hylogen-yay)