quietriot
"Come on Feel the Noise..." - Kevin DuBrow, Quiet Riot
Sean McCullough's JS port of Stefan Gustavson's Java Perlin noise generator. https://gist.github.com/304522
Ported from Stefan Gustavson's java implementation. Read Stefan's excellent paper for details on how this code works. simplexnoise.pdf
Returns a number between 1 and -1 in a pattern that simulates a natural system. Use it to create natural looking effects.
Install
To include quietriot as a component in your project, use the node module.
npm install quietriot --save
You can also use the standalone version and reference the js file from your document.
<html>
<head>
<script src="scripts/quietriot.min.js" type="text/javascript" charset="utf-8"></script>
</head>
...
Usage
The module exports a SimplexNoise class. In a nodejs project, you access it via:
var SimplexNoise = require('../src/quietriot');
var output = SimplexNoise.noise(100, 100);
Pass a sequence to SimplexNoise like a simple counter. The noise() function will return a number between 1 and -1.
for (var i = 0; i < 3000; i++) {
var n = SimplexNoise.noise(i * 0.005, i * 0.005);
console.log(n);
}
... the console reports...
0.3847620388983191
5.960162692938055
11.521264167148217
17.054733369185694
22.547320097353587
27.985896809088334
33.35749804547538
38.649359400666405
43.84895592589604
48.9440398588889
53.92267757056956
58.77328562253707
63.48466583028164
Map these number to a range to achieve natural looking motion, color palettes or even sound.
Please review the docs for more details.
Building this project
This project uses Grunt. To build the project first install the node modules.
npm install
Next, run grunt.
grunt
To run the tests, run 'npm test'.
npm test
To check test coverage run 'grunt coverage'.
grunt coverage
A pre-commit hook is defined in /pre-commit that runs jshint. To use the hook, run the following:
ln -s ../../pre-commit .git/hooks/pre-commit
A post-commit hook is defined in /post-commit that runs the Plato complexity analysis tools. To use the hook, run the following:
ln -s ../../post-commit .git/hooks/post-commit
View the code complexity report.