3d-force-graph-vr

3D Force-Directed Graph in VR

A web component to represent a graph data structure in virtual reality using a force-directed iterative layout. Uses A-Frame for VR rendering and d3-force-3d for the layout physics engine.

Check out the examples:

• Basic (source)
• Asynchronous load (source)
• Larger graph (~4k elements) (source)
• Directional links (source)
• Curved lines and self links (source)
• Auto-colored nodes/links (source)
• Text as nodes (source)
• Custom node geometries (source)
• Dynamic data changes (source)

See also the WebGL 3D version, and the A-Frame component version (aframe-forcegraph-component).

And check out the React bindings.

Quick start

import ForceGraphVR from '3d-force-graph-vr';

or

var ForceGraphVR = require('3d-force-graph-vr');

or even

<script src="//unpkg.com/3d-force-graph-vr"></script>

then

var myGraph = ForceGraphVR();
myGraph(<myDOMElement>)
    .graphData(<myData>);

API reference

Data input

Method	Description	Default
graphData([data])	Getter/setter for graph data structure (see below for syntax details).	{ nodes: [], links: [] }
jsonUrl([url])	URL of JSON file to load graph data directly from, as an alternative to specifying graphData directly.
nodeId([str]) (alias: idField)	Node object accessor attribute for unique node id (used in link objects source/target).	id
linkSource([str]) (alias: linkSourceField)	Link object accessor attribute referring to id of source node.	source
linkTarget([str]) (alias: linkTargetField)	Link object accessor attribute referring to id of target node.	target

Container layout

Method	Description	Default
width([px])	Getter/setter for the canvas width.	<window width>
height([px])	Getter/setter for the canvas height.	<window height>
backgroundColor([str])	Getter/setter for the chart background color.	#000011
showNavInfo([boolean])	Getter/setter for whether to show the navigation controls footer info.	true

Node styling

Method	Description	Default
nodeRelSize([num])	Getter/setter for the ratio of node sphere volume (cubic px) per value unit.	4
nodeVal([num, str or fn]) (alias: valField)	Node object accessor function, attribute or a numeric constant for the node numeric value (affects sphere volume).	val
nodeLabel([str or fn]) (alias: nameField)	Node object accessor function or attribute for name (shown in label).	name
nodeDesc([str or fn])	Node object accessor function or attribute for description (shown under label).	desc
nodeColor([str or fn]) (alias: colorField)	Node object accessor function or attribute for node color (affects sphere color).	color
nodeAutoColorBy([str or fn]) (alias: autoColorBy)	Node object accessor function (fn(node)) or attribute (e.g. 'type') to automatically group colors by. Only affects nodes without a color attribute.
nodeOpacity([num])	Getter/setter for the nodes sphere opacity, between [0,1].	0.75
nodeResolution([num])	Getter/setter for the geometric resolution of each node, expressed in how many slice segments to divide the circumference. Higher values yield smoother spheres.	8
nodeThreeObject([Object3d, str or fn])	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 styling

Method	Description	Default
linkLabel([str or fn])	Link object accessor function or attribute for name (shown in label).	name
linkDesc([str or fn])	Link object accessor function or attribute for description (shown under label).	desc
linkColor([str or fn]) (alias: linkColorField)	Link object accessor function or attribute for line color.	color
linkAutoColorBy([str or fn])	Link object accessor function (fn(link)) or attribute (e.g. 'type') to automatically group colors by. Only affects links without a color attribute.
linkOpacity([num]) (alias: lineOpacity)	Getter/setter for line opacity of links, between [0,1].	0.2
linkWidth([num, str or fn])	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
linkResolution([num])	Getter/setter for the 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
linkCurvature([num, str or fn])	Link object accessor function, attribute or a numeric constant for the curvature radius of the link line. Only applicable to links using ThreeJS Line (0 width). Curved lines are represented as 3D bezier curves, and any numeric value is accepted. A value of 0 renders a straight line. 1 indicates a radius equal to half of the line length, causing the curve to approximate a semi-circle. For self-referencing links (source equal to target) the curve is represented as a loop around the node, with length proportional to the curvature value. Lines are curved clockwise for positive values, and counter-clockwise for negative values. Note that rendering curved lines is purely a visual effect and does not affect the behavior of the underlying forces.	0
linkCurveRotation([num, str or fn])	Link object accessor function, attribute or a numeric constant for the rotation along the line axis to apply to the curve. Has no effect on straight lines. At 0 rotation, the curve is oriented in the direction of the intersection with the XY plane. The rotation angle (in radians) will rotate the curved line clockwise around the "start-to-end" axis from this reference orientation.	0
linkMaterial([Material, str or fn])	Link object accessor function or attribute for specifying a custom material to style the graph links with. Should return an instance of ThreeJS Material. If a falsy value is returned, the default material will be used instead for that link.	default link material is MeshLambertMaterial styled according to color and opacity.
linkHoverPrecision([int])	Whether to display the link label when gazing the link closely (low value) or from far away (high value).	2
linkDirectionalParticles([num, str or fn])	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
linkDirectionalParticleSpeed([num, str or fn])	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
linkDirectionalParticleWidth([num, str or fn])	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
linkDirectionalParticleColor([str or fn])	Link object accessor function or attribute for the directional particles color.	color
linkDirectionalParticleResolution([num])	Getter/setter for the geometric resolution of each directional particle, expressed in how many slice segments to divide the circumference. Higher values yield smoother particles.	4

Force engine configuration

Method	Description	Default
forceEngine([str])	Getter/setter for which force-simulation engine to use (d3 or ngraph).	d3
numDimensions([int])	Getter/setter for number of dimensions to run the force simulation on (1, 2 or 3).	3
d3AlphaDecay([num])	Getter/setter for the simulation intensity decay parameter, only applicable if using the d3 simulation engine.	0.0228
d3VelocityDecay([num])	Getter/setter for the nodes' velocity decay that simulates the medium resistance, only applicable if using the d3 simulation engine.	0.4
warmupTicks([int])	Getter/setter for number of layout engine cycles to dry-run at ignition before starting to render.	0
cooldownTicks([int])	Getter/setter for how many build-in frames to render before stopping and freezing the layout engine.	Infinity
cooldownTime([num])	Getter/setter for how long (ms) to render for before stopping and freezing the layout engine.	15000

Input JSON syntax

{
    "nodes": [ 
        { 
          "id": "id1",
          "name": "name1",
          "val": 1 
        },
        { 
          "id": "id2",
          "name": "name2",
          "val": 10 
        },
        (...)
    ],
    "links": [
        {
            "source": "id1",
            "target": "id2"
        },
        (...)
    ]
}