This package provides control utilities for the Hydra visual synthesizer.

Installation

The easiest way to add this package to your Hydra instance is by getting the hydralfo.min.js from the dist directory and put it in the hydra-server/public directory of Hydra.

Then amend the hydra-server/public/index.html by adding a new script tag to include the file:

  <title>&lt; hydra &gt;</title>
  <script src="./bundle.js"></script>
  <script src="./hydralfo.min.js"></script> <!--  INSERT THIS LINE -->
  <meta charset="UTF-8">

Usage

Below are some examples on how to use hydralfo. You might also be able to find more information on the Hydra LFO GitHub Pages (work in progress...).

L = require('hydralfo').init();

console.log(typeof L.sin()); // === 'function', can be used for Hydra values
console.log(L.sin().run({time: 1})); // you can eavaluate results with .run

// change shapes continously between 4 and <8
shape(
  L.sin({f:0.5, s: 4, o: 4}) // frequency 1/2 times per second, scale 0-4, offset 4
).out(o0)

// change shapes between 4 and <8 in discrete 0.5 size steps
shape(
  L.sin({f:0.5, s: 4, o: 4})
  .mul(2)
  .floor()
  .div(2)
).out(o0)

// functions can be arguments as well
shape(
  L.sin({
    f:0.5
    , s: L.sin({f: 1, o: 2}) // scale for first sin is based on second sin => frequency modulation
    , o: () => 3 + (13 / Math.max(13, window.screen.width / 100)) // you can supply custom functions
  })
).out(o0)

// cycle through shapes every 4 seconds
shape(
  L.slow(4) // slow down time
  .choose([10, 16, 8, 20]) // use it as an index
).out(o0)

Building

npm run dist

License

Copyright (C) 2019  oscons (github.com/oscons). All rights reserved.
Licensed under the GNU General Public License, Version 2.0.

See LICENSE file for more information.