cytoscape-springy

Description

The Springy physics simulation layout for Cytoscape.js

The springy layout gives relatively slow and poor results compared to other physics simulation layouts. Consider using cose, cose-bilkent, or cola instead.

The springy layout uses a force-directed physics simulation, written by Dennis Hotson. For more information about Springy and its parameters, refer to its documentation.

Dependencies

• Cytoscape.js ^2.4.0 || ^3.0.0
• Springy.js ^2.5.0

Usage instructions

Download the library:

• via npm: npm install cytoscape-springy,
• via bower: bower install cytoscape-springy, or
• via direct download in the repository (probably from a tag).

require() the library as appropriate for your project:

CommonJS:

var cytoscape = require('cytoscape');
var cyspringy = require('cytoscape-springy');
 
cyspringy( cytoscape ); // register extension

AMD:

require(['cytoscape', 'cytoscape-springy', 'springy'], function( cytoscape, cyspringy, Springy ){
  cyspringy( cytoscape, Springy ); // register extension
});

Plain HTML/JS has the extension registered for you automatically, because no require() is needed.

API

Call the layout, e.g. cy.layout({ name: 'springy', ... }), with options:

var defaults = {
  animate: true, // whether to show the layout as it's running
  maxSimulationTime: 4000, // max length in ms to run the layout
  ungrabifyWhileSimulating: false, // so you can't drag nodes during layout
  fit: true, // whether to fit the viewport to the graph
  padding: 30, // padding on fit
  boundingBox: undefined, // constrain layout bounds; { x1, y1, x2, y2 } or { x1, y1, w, h }
  randomize: false, // whether to use random initial positions
  infinite: false, // overrides all other options for a forces-all-the-time mode
  ready: undefined, // callback on layoutready
  stop: undefined, // callback on layoutstop
 
  // springy forces and config
  stiffness: 400,
  repulsion: 400,
  damping: 0.5,
  edgeLength: function( edge ){
    var length = edge.data('length');
 
    if( length !== undefined && !isNaN(length) ){
      return length;
    }
  }
};

Publishing instructions

This project is set up to automatically be published to npm and bower. To publish:

1. Set the version number environment variable: export VERSION=1.2.3
2. Publish: gulp publish
3. If publishing to bower for the first time, you'll need to run bower register cytoscape-springy https://github.com/cytoscape/cytoscape.js-springy.git
4. Make a release on GitHub to automatically register a new Zenodo DOI