aframe-forcegraph-component

aframe-forcegraph-component

A 3D Force-Directed Graph component for A-Frame.

An A-Frame entity component to represent a graph data structure in a VR environment using a force-directed iterative layout. Uses three-forcegraph as the underlying ThreeJS component to manage the graph object.

See also the standalone VR component version.

API

Property	Description	Default Value
json-url	URL of JSON file to load graph data directly from. Will override content of the nodes and links component properties so either use one or the other. JSON should contain an object with two list properties: nodes and links.
nodes	List of node objects. Example: [{"id": 1, "name": "first"}, {"id": 2, "name": "second"}]	[]
links	List of link objects. Example: [{"source": 1, "target": 2}]	[]
num-dimensions	Number of dimensions to run the force simulation on (1, 2 or 3).	3
node-rel-size	Node sphere volume per value unit.	4
node-id	Node object accessor attribute for unique node id (used in link objects source/target).	id
node-label	Node object accessor function or attribute for name (shown in label).	name
node-desc	Node object accessor function or attribute for description (shown under label).	desc
node-val	Node object accessor function, attribute or a numeric constant for the node numeric value (affects sphere volume).	val
node-resolution	Geometric resolution of each node, expressed in how many slice segments to divide the circumference. Higher values yield smoother spheres.	8
node-color	Node object accessor function or attribute for node color (affects sphere color).	color
node-auto-color-by	Node object accessor function (fn(node)) or attribute (e.g. 'type') to automatically group colors by. Only affects nodes without a color attribute.
node-opacity	Nodes sphere opacity, between [0,1].	0.75
node-three-object	Node object accessor function or attribute for generating a custom 3d object to render as graph nodes. Should return an instance of ThreeJS Object3d. If a falsy value is returned, the default 3d object type will be used instead for that node.	default node object is a sphere, sized according to val and styled according to color.
link-source	Link object accessor attribute referring to id of source node.	source
link-target	Link object accessor attribute referring to id of target node.	target
link-label	Link object accessor function or attribute for name (shown in label).	name
link-desc	Link object accessor function or attribute for description (shown under label).	desc
link-hover-precision	Whether to display the link label when gazing the link closely (low value) or from far away (high value).	2
link-color	Link object accessor function or attribute for line color.	color
link-auto-color-by	Link object accessor function (fn(link)) or attribute (e.g. 'type') to automatically group colors by. Only affects links without a color attribute.
link-opacity	Line opacity of links, between [0,1].	0.2
link-width	Link object accessor function, attribute or a numeric constant for the link line width. A value of zero will render a ThreeJS Line whose width is constant (1px) regardless of distance. Values are rounded to the nearest decimal for indexing purposes.	0
link-resolution	Geometric resolution of each link, expressed in how many radial segments to divide the cylinder. Higher values yield smoother cylinders. Applicable only to links with positive width.	6
link-directional-particles	Link object accessor function, attribute or a numeric constant for the number of particles (small spheres) to display over the link line. The particles are distributed equi-spaced along the line, travel in the direction source > target, and can be used to indicate link directionality.	0
link-directional-particle-speed	Link object accessor function, attribute or a numeric constant for the directional particles speed, expressed as the ratio of the link length to travel per frame. Values above 0.5 are discouraged.	0.01
link-directional-particle-width	Link object accessor function, attribute or a numeric constant for the directional particles width. Values are rounded to the nearest decimal for indexing purposes.	0.5
link-directional-particle-resolution	Geometric resolution of each directional particle, expressed in how many slice segments to divide the circumference. Higher values yield smoother particles.	4
force-engine	Which force-simulation engine to use (d3 or ngraph).	d3
d3-alpha-decay	Simulation intensity decay parameter, only applicable if using the d3 simulation engine.	0.0228
d3-velocity-decay	Nodes' velocity decay that simulates the medium resistance, only applicable if using the d3 simulation engine.	0.4
warmup-ticks	How many times to tick the force simulation engine at ignition before starting to render.	0
cooldown-ticks	How many times to tick the force simulation engine after rendering begins before stopping and freezing the engine.	Infinity
cooldown-time	How long (ms) to tick the force simulation engine for after rendering begins before stopping and freezing the engine.	15000

Installation

Browser

Install and use by directly including the browser files:

<head>
  <title>My A-Frame Scene</title>
  <script src="https://aframe.io/releases/0.7.1/aframe.min.js"></script>
  <script src="https://unpkg.com/aframe-forcegraph-component/dist/aframe-forcegraph-component.min.js"></script>
</head>

<body>
  <a-scene>
    <a-entity forcegraph="json-url: myGraphData.json"></a-entity>
  </a-scene>
</body>

Or with angle, you can install the proper version of the component straight into your HTML file, respective to your version of A-Frame:

angle install aframe-forcegraph-component

npm

Install via npm:

npm install aframe-forcegraph-component

Then require and use.

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