Function webglGraphics

src/View/webglGraphics.js:27–586

* Performs webgl-based graph rendering. This module does not perform * layout, but only visualizes nodes and edges of the graph. * * @param options - to customize graphics behavior. Currently supported parameter * enableBlending - true by default, allows to use transparency in node/links c

(options)

 */

function webglGraphics(options) {
    options = merge(options, {
        enableBlending : true,
        preserveDrawingBuffer : false,
        clearColor: false,
        clearColorValue : {
            r : 1,
            g : 1,
            b : 1,
            a : 1
        }
    });

    var container,
        graphicsRoot,
        gl,
        width,
        height,
        nodesCount = 0,
        linksCount = 0,
        transform = [
            1, 0, 0, 0,
            0, 1, 0, 0,
            0, 0, 1, 0,
            0, 0, 0, 1
        ],
        userPlaceNodeCallback,
        userPlaceLinkCallback,
        nodes = [],
        links = [],
        initCallback,

        allNodes = {},
        allLinks = {},
        linkProgram = webglLinkProgram(),
        nodeProgram = webglNodeProgram(),
/*jshint unused: false */
        nodeUIBuilder = function (node) {
            return webglSquare(); // Just make a square, using provided gl context (a nodeProgram);
        },

        linkUIBuilder = function (link) {
            return webglLine(0xb3b3b3ff);
        },
/*jshint unused: true */
        updateTransformUniform = function () {
            linkProgram.updateTransform(transform);
            nodeProgram.updateTransform(transform);
        },

        resetScaleInternal = function () {
            transform = [1, 0, 0, 0,
                        0, 1, 0, 0,
                        0, 0, 1, 0,
                        0, 0, 0, 1];
        },

        updateSize = function () {