Websites/browserbench.org/MotionMark/tests/master/resources/svg-particles.js

(function() {

SVGParticle = Utilities.createSubclass(Particle,
    function(stage)
    {
        var shapeId = "#shape-" + Stage.randomInt(1, stage.particleTypeCount);
        this.isClipPath = Stage.randomBool();
        if (this.isClipPath) {
            this.element = Utilities.createSVGElement("rect", {
                x: 0,
                y: 0,
                "clip-path": "url(" + shapeId + ")"
            }, {}, stage.element);
        } else {
            var shapePath = document.querySelector(shapeId + " path");
            this.element = shapePath.cloneNode();
            stage.element.appendChild(this.element);
        }

        this.gradient = document.getElementById("default-gradient").cloneNode(true);
        this.gradient.id = "gradient-" + stage.gradientsCounter++;
        stage.gradientsDefs.appendChild(this.gradient);
        this.element.setAttribute("fill", "url(#" + this.gradient.id + ")");

        Particle.call(this, stage);
    }, {

    sizeMinimum: 30,
    sizeRange: 40,

    reset: function()
    {
        Particle.prototype.reset.call(this);

        this.position = Stage.randomElementInArray(this.stage.emitLocation);

        var velocityMagnitude = Stage.random(.5, 2.5);
        var angle = Stage.randomInt(0, this.stage.emitSteps) / this.stage.emitSteps * Math.PI * 2 + Stage.dateCounterValue(1000) * this.stage.emissionSpin + velocityMagnitude;
        this.velocity = new Point(Math.sin(angle), Math.cos(angle))
            .multiply(velocityMagnitude);

        if (this.isClipPath) {
            this.element.setAttribute("width", this.size.x);
            this.element.setAttribute("height", this.size.y);
            this.transformSuffix = " translate(-" + this.size.center.x + ",-" + this.size.center.y + ")";
        } else
            this.transformSuffix = " scale(" + this.size.x + ") translate(-.5,-.5)";

        this.stage.colorOffset = (this.stage.colorOffset + .5) % 360;

        var transform = this.stage.element.createSVGTransform();
        transform.setRotate(Stage.randomInt(0, 359), 0, 0);
        this.gradient.gradientTransform.baseVal.initialize(transform);

        var stops = this.gradient.querySelectorAll("stop");
        stops[0].setAttribute("stop-color", "hsl(" + this.stage.colorOffset + ", 70%, 45%)");
        stops[1].setAttribute("stop-color", "hsl(" + ((this.stage.colorOffset + Stage.randomInt(50,100)) % 360) + ", 70%, 65%)");
    },

    move: function()
    {
        this.element.setAttribute("transform", "translate(" + this.position.x + "," + this.position.y + ") " + this.rotater.rotate(Point.zero) + this.transformSuffix);
    }
});

SVGParticleStage = Utilities.createSubclass(ParticlesStage,
    function()
    {
        ParticlesStage.call(this);
    }, {

    initialize: function(benchmark)
    {
        ParticlesStage.prototype.initialize.call(this, benchmark);
        this.emissionSpin = Stage.random(0, 3);
        this.emitSteps = Stage.randomInt(4, 6);
        this.emitLocation = [
            new Point(this.size.x * .25, this.size.y * .333),
            new Point(this.size.x * .5, this.size.y * .25),
            new Point(this.size.x * .75, this.size.y * .333)
        ];
        this.colorOffset = Stage.randomInt(0, 359);

        this.particleTypeCount = document.querySelectorAll(".shape").length;
        this.gradientsDefs = document.getElementById("gradients");
        this.gradientsCounter = 0;
    },

    createParticle: function()
    {
        return new SVGParticle(this);
    },

    willRemoveParticle: function(particle)
    {
        particle.element.remove();
        if (particle.gradient)
            particle.gradient.remove();
    }
});

SVGParticleBenchmark = Utilities.createSubclass(Benchmark,
    function(options)
    {
        Benchmark.call(this, new SVGParticleStage(), options);
    }
);

window.benchmarkClass = SVGParticleBenchmark;

})();