aframe-fractal-component

Lorenz Attractor

An A-Frame component for graphing audio responsive points.

Installation

Browser

Install and use by directly including the browser files:

<head>
  <title>My A-Frame Scene</title>
  <script src="https://aframe.io/releases/0.8.2/aframe.min.js"></script> 
  <script src="https://unpkg.com/aframe-fractal-component/dist/aframe-fractal-component.min.js"></script> 
</head>
 
<body>
  <a-scene>
    <a-entity fractal="foo: bar"></a-entity>
  </a-scene>
</body>

npm

Install via npm:

npm install aframe-fractal-component

Then require and use.

require('aframe');
require('aframe-fractal-component');

API

Property	Type	Default	Description
audioSource	selector/attribute	*	A-Sound element.
fftSize	int	256	A non-zero power of two up to 2048, representing the size of the FFT.
colors	array	'#f4ee42', '#41f468', '#41dff4'	Array of colors used to describe the frequency.
points	int	100	Number of points to be plotted.
pointSize	int	1	Size of individual points.
detail	int	100	How many material objects to use.
scale	int	1	The coordinates of each point will be multiplied by this number.
logValues	boolean	false	Set to true to log the x, y, and z values of the points to the console.
x	string/javascript	t	The function used to determine the x axis of each point based on t.
y	string/javascript	t	The function used to determine the y axis of each point based on t.
z	string/javascript	t	The function used to determine the z axis of each point based on t.

Example

<a-sound src='src: url(../music/song.mp3)' position='0 0 -10' id='audio' autoplay='true'></a-sound>
 
<a-entity audioSource='#audio' fractal='points: 200; x: Math.sin(t) * (t^2); z: Math.sin(t^2);' position='0 140 0' rotation='0 0 180'></a-entity>

Instructions

To plot a set of points, you have define f(t) for x, y, and z. In the example at the top of this page I defined f(t) for z as Math.sin(t^2). For each 200 points, it will increment t by 1 and return the value of f(t) in the case of z.

Previous points

Most attractors determine their values based on the coordinates of the last point. To access the last point that was plotted, simply include prev.x, prev.y, or prev.z in your f(t) function.

aframe-fractal-component