motorcortex-sigmajs

Description

Sigma-JS library instanciates and renders graphs with any number of nodes and edges in a web container. The MotorCortex implementation embeds these instanciates and any animations performed on them within Groups of Incidents. Each Group refers to a different graph and therefore a different instance of sigma. Each Group can be a host to child-incidents that perform animations on the said sigma graph.

Various options are available for the user, from different renderers and display properties, to exporting data and images from the rendered graphs (see inner documentation and Sigma-JS plugins implemented in this version below)

Installation

$ npm install --save @kissmybutton/motorcortex-sigma

Importing

import MotorCortex from "@kissmybutton/motorcortex";
import Sigma from "@kissmybutton/motorcortex-sigma";

Loading

const plugins = MotorCortex.loadPlugin(Sigma);
const anime = new plugins.Sigma(attrs, props);

API

Graph Creation

-The user can either create their own graph or provide a certain number of nodes (N), edges (E) and clusters (C) (optional). The graph must be an array containing a nodes and an edges array. Each of those must contain node and edge objects following this template:

graph.nodes[i] = {
    id: 'n'+i,
    lavel: 'Node ' + i, //user may change this
    x: xCoordinate,
    y: yCoordinate,
    size: decimal, (the size of node)
    color: colorOfNode (rgb or hex)
}
graph.edges[i] = {
    id: 'e' + i,
    label: 'Edge ' + i, (optional)
    source: 'n' + a,
    target: 'n' + b,
    size: sizeOfEdge,
    color: colorOfEdge
}

Sigma Instanciation

Creating a SigmaBasePlugin instance requires certain attributes and properties:

attrs = {
    attrs:{
        N: numberOfNodes,
        E: numberOfEdges,
        C: numberOfClusters, (optional)
        rendererType: DefaultIsCanvas (note that most feature of the current version only work in canvas)
        customGraph: userProvidedCustomGraph
        settings:{
            any setting provided in sigma.settings.js
        },
        options:{
            drag_nodes: T/F,
            parallelEdges: T/F,
            edgeCurve: T/F,
            customEdgeShapes: T/F,
            edgeLabels: T/F
        },
        cmd: {
            sigmaFunction: {
                params
            }
        }
    }
}
props = {
    css of group,
    host element of group,
    html of group,
    containerParameters of host element 
}

NOTE Simply instanciating Sigma will render the given graph.

Animating the graph

Animation Child-Incidents of group are defined as follows:

new Sigma.SigmaAnimPlugin(
    //attrs
    {
        attrs:{
            master: theParentGroup
        },
        animatedAttrs:{
            finalG: the final form of the graph
        }   
    },
    //props
    {
        duration: the duration of the animation in milliseconds,
        selector: DOM selector of the host element
    }
);
groupName.addIncident(childIncidentName, millisecondTimeStart)

SIGMA PLUGINS IMPLEMENTED

The following plugins of the SigmaJS library are currently supported by the MC SigmaJS plugin implementation (most are exclusive to the canvas renderer): -plugins.animate --> implemented allowing MC to call requestAnimationFrame function instead of sigma -plugins.dragNodes --> resets the graph to he result after the drag -renderers.parallelEdges --> custom graph creation includes parallel edges. -renderers.customEdgeShapes --> renderers support custom edge creation for dashed, dotted, parallel and taperred edges (only compatible with canvas) -renderers.edgeDots --> renderers support the creation of curved edges/arrows -renderers.edgeLabels --> renderers support display of edge labels -renderers.snapshot --> can export an image file directly from a renderer -plugins.neighborhoods --> can export the nodes that a node is connected to (the node's neighborhood) -statistics.HITS --> can export Hub and Authority statistics about the nodes of a graph. -pathfinding.astar --> can export an array demonstrating the path from 2 target nodes (using the alpha-star algorithm)