codeflash-agent/reports/unstructured-security/assets/lightspeed.js

(function() {
    if (document.getElementById('lightspeed-canvas')) return;

    var canvas = document.createElement('canvas');
    canvas.id = 'lightspeed-canvas';
    canvas.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:9999;';
    document.body.insertBefore(canvas, document.body.firstChild);

    var ctx = canvas.getContext('2d');
    var dpr = window.devicePixelRatio || 1;
    var W, H;

    function resize() {
        W = window.innerWidth;
        H = window.innerHeight;
        canvas.width = W * dpr;
        canvas.height = H * dpr;
        canvas.style.width = W + 'px';
        canvas.style.height = H + 'px';
        ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
    }
    resize();
    window.addEventListener('resize', resize);

    var palette = [
        {r:70,  g:90,  b:130, w:5},
        {r:90,  g:110, b:155, w:4},
        {r:110, g:135, b:180, w:3},
        {r:60,  g:75,  b:110, w:3},
        {r:130, g:155, b:200, w:2},
        {r:255, g:210, b:39,  w:1},
    ];
    var wc = [];
    for (var p = 0; p < palette.length; p++)
        for (var w = 0; w < palette[p].w; w++) wc.push(palette[p]);

    var NUM = 80;
    var bars = [];

    function makeBar(scatter) {
        var c = wc[Math.floor(Math.random() * wc.length)];
        var angleDeg = 8 + Math.random() * 14;
        var angle = angleDeg * Math.PI / 180;
        var len = 120 + Math.random() * 500;
        var thickness = 4 + Math.random() * 14;
        var speed = 0.15 + Math.random() * 0.6;
        var x = -len - Math.random() * 400;
        var y = Math.random() * H * 1.4 - H * 0.2;

        if (scatter) {
            x = Math.random() * (W + len) - len * 0.5;
            y = Math.random() * H;
        }

        return {
            x: x, y: y,
            angle: angle,
            speed: speed,
            len: len,
            thickness: thickness,
            color: c,
            alpha: 0.12 + Math.random() * 0.22,
            life: 0,
            maxLife: 800 + Math.random() * 2000
        };
    }

    for (var i = 0; i < NUM; i++) bars.push(makeBar(true));

    function draw() {
        ctx.clearRect(0, 0, W, H);

        for (var i = 0; i < NUM; i++) {
            var b = bars[i];
            b.x += Math.cos(b.angle) * b.speed;
            b.y += Math.sin(b.angle) * b.speed;
            b.life++;

            if (b.x > W + b.len * 2 || b.life > b.maxLife) {
                bars[i] = makeBar(false);
                b = bars[i];
            }

            var lp = b.life / b.maxLife;
            var fade = lp < 0.15 ? lp / 0.15 :
                       lp > 0.7 ? (1 - lp) / 0.3 : 1;
            var a = b.alpha * Math.max(0, fade);

            var cos = Math.cos(b.angle);
            var sin = Math.sin(b.angle);
            var px = -sin * b.thickness * 0.5;
            var py =  cos * b.thickness * 0.5;

            var x0 = b.x;
            var y0 = b.y;
            var x1 = b.x + cos * b.len;
            var y1 = b.y + sin * b.len;

            var grad = ctx.createLinearGradient(x0, y0, x1, y1);
            var cr = b.color.r, cg = b.color.g, cb = b.color.b;
            grad.addColorStop(0, 'rgba(' + cr + ',' + cg + ',' + cb + ',0)');
            grad.addColorStop(0.2, 'rgba(' + cr + ',' + cg + ',' + cb + ',' + a + ')');
            grad.addColorStop(0.8, 'rgba(' + cr + ',' + cg + ',' + cb + ',' + a + ')');
            grad.addColorStop(1, 'rgba(' + cr + ',' + cg + ',' + cb + ',0)');

            ctx.beginPath();
            ctx.moveTo(x0 + px, y0 + py);
            ctx.lineTo(x1 + px, y1 + py);
            ctx.lineTo(x1 - px, y1 - py);
            ctx.lineTo(x0 - px, y0 - py);
            ctx.closePath();
            ctx.fillStyle = grad;
            ctx.fill();
        }
        requestAnimationFrame(draw);
    }
    requestAnimationFrame(draw);
})();