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  <title>北辰官网-这里有你想要的！西咸新区沣东新城高美庆百货店</title>
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            // ----------------------------------------------------------------------------------------

            function Tendril(options) {
                this.init(options || {});
            }

            Tendril.prototype = (function () {

                function Node() {
                    this.x = 0;
                    this.y = 0;
                    this.vy = 0;
                    this.vx = 0;
                }

                return {

                    init: function (options) {

                        this.spring = options.spring + (Math.random() * 0.1) - 0.05;
                        this.friction = settings.friction + (Math.random() * 0.01) - 0.005;
                        this.nodes = [];

                        for (var i = 0, node; i < settings.size; i++) {

                            node = new Node();
                            node.x = target.x;
                            node.y = target.y;

                            this.nodes.push(node);
                        }
                    },

                    update: function () {

                        var spring = this.spring,
                            node = this.nodes[0];

                        node.vx += (target.x - node.x) * spring;
                        node.vy += (target.y - node.y) * spring;

                        for (var prev, i = 0, n = this.nodes.length; i < n; i++) {

                            node = this.nodes[i];

                            if (i > 0) {

                                prev = this.nodes[i - 1];

                                node.vx += (prev.x - node.x) * spring;
                                node.vy += (prev.y - node.y) * spring;
                                node.vx += prev.vx * settings.dampening;
                                node.vy += prev.vy * settings.dampening;
                            }

                            node.vx *= this.friction;
                            node.vy *= this.friction;
                            node.x += node.vx;
                            node.y += node.vy;

                            spring *= settings.tension;
                        }
                    },

                    draw: function () {

                        var x = this.nodes[0].x,
                            y = this.nodes[0].y,
                            a, b;

                        ctx.beginPath();
                        ctx.moveTo(x, y);

                        for (var i = 1, n = this.nodes.length - 2; i < n; i++) {

                            a = this.nodes[i];
                            b = this.nodes[i + 1];
                            x = (a.x + b.x) * 0.5;
                            y = (a.y + b.y) * 0.5;

                            ctx.quadraticCurveTo(a.x, a.y, x, y);
                        }

                        a = this.nodes[i];
                        b = this.nodes[i + 1];

                        ctx.quadraticCurveTo(a.x, a.y, b.x, b.y);
                        ctx.stroke();
                        ctx.closePath();
                    }
                };

            })();

            // ----------------------------------------------------------------------------------------

            function init(event) {

                document.removeEventListener('mousemove', init);
                document.removeEventListener('touchstart', init);

                document.addEventListener('mousemove', mousemove);
                document.addEventListener('touchmove', mousemove);
                document.addEventListener('touchstart', touchstart);

                mousemove(event);
                reset();
                loop();
            }

            function reset() {

                tendrils = [];

                for (var i = 0; i < settings.trails; i++) {

                    tendrils.push(new Tendril({
                        spring: 0.45 + 0.025 * (i / settings.trails)
                    }));
                }
            }

            function loop() {

                if (!ctx.running) return;

                ctx.globalCompositeOperation = 'source-over';
                ctx.fillStyle = 'rgba(8,5,16,0.4)';
                ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
                ctx.globalCompositeOperation = 'lighter';
                ctx.strokeStyle = 'hsla(' + Math.round(hue.update()) + ',90%,50%,0.25)';
                ctx.lineWidth = 1;

                if (ctx.frame % 60 == 0) {
                    console.log(hue.update(), Math.round(hue.update()), hue.phase, hue.offset, hue.frequency, hue.amplitude);
                }

                for (var i = 0, tendril; i < settings.trails; i++) {
                    tendril = tendrils[i];
                    tendril.update();
                    tendril.draw();
                }

                ctx.frame++;
                ctx.stats.update();
                requestAnimFrame(loop);
            }

            function resize() {
                ctx.canvas.width = window.innerWidth;
                ctx.canvas.height = window.innerHeight;
            }

            function start() {
                if (!ctx.running) {
                    ctx.running = true;
                    loop();
                }
            }

            function stop() {
                ctx.running = false;
            }

            function mousemove(event) {
                if (event.touches) {
                    target.x = event.touches[0].pageX;
                    target.y = event.touches[0].pageY;
                } else {
                    target.x = event.clientX
                    target.y = event.clientY;
                }
                event.preventDefault();
            }

            function touchstart(event) {
                if (event.touches.length == 1) {
                    target.x = event.touches[0].pageX;
                    target.y = event.touches[0].pageY;
                }
            }

            function keyup(event) {

                switch (event.keyCode) {
                    case 32:
                        save();
                        break;
                    default:
                        // console.log(event.keyCode); hovertree.com
                }
            }

            function letters(id) {

                var el = document.getElementById(id),
                    letters = el.innerHTML.replace('&amp;', '&').split(''),
                    heading = '';

                for (var i = 0, n = letters.length, letter; i < n; i++) {
                    letter = letters[i].replace('&', '&amp');
                    heading += letter.trim() ? '<span class="letter-' + i + '">' + letter + '</span>' : '&nbsp;';
                }

                el.innerHTML = heading;
                setTimeout(function () {
                    el.className = 'transition-in';
                }, (Math.random() * 500) + 500);
            }

            function save() {

                if (!buffer) {

                    buffer = document.createElement('canvas');
                    buffer.width = screen.availWidth;
                    buffer.height = screen.availHeight;
                    buffer.ctx = buffer.getContext('2d');

                    form = document.createElement('form');
                    form.method = 'post';
                    form.input = document.createElement('input');
                    form.input.type = 'hidden';
                    form.input.name = 'data';
                    form.appendChild(form.input);

                    document.body.appendChild(form);
                }

                buffer.ctx.fillStyle = 'rgba(8,5,16)';
                buffer.ctx.fillRect(0, 0, buffer.width, buffer.height);

                buffer.ctx.drawImage(canvas,
                    Math.round(buffer.width / 2 - canvas.width / 2),
                    Math.round(buffer.height / 2 - canvas.height / 2)
                );

                buffer.ctx.drawImage(logo,
                    Math.round(buffer.width / 2 - logo.width / 4),
                    Math.round(buffer.height / 2 - logo.height / 4),
                    logo.width / 2,
                    logo.height / 2
                );

                window.open(buffer.toDataURL(), 'wallpaper', 'top=0,left=0,width=' + buffer.width + ',height=' + buffer.height);

                // form.input.value = buffer.toDataURL().substr(22);
                // form.submit(); hovertree.com
            }

            window.requestAnimFrame = (function () {
                return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function (fn) { window.setTimeout(fn, 1000 / 60) };
            })();

            window.onload = function () {

                ctx = document.getElementById('canvas').getContext('2d');
                ctx.stats = new Stats();
                ctx.running = true;
                ctx.frame = 1;

               
                hue = new Oscillator({
                    phase: Math.random() * Math.TWO_PI,
                    amplitude: 85,
                    frequency: 0.0015,
                    offset: 285
                });

             
                document.addEventListener('mousemove', init);
                document.addEventListener('touchstart', init);
                document.body.addEventListener('orientationchange', resize);
                window.addEventListener('resize', resize);
                window.addEventListener('keyup', keyup);
                window.addEventListener('focus', start);
                window.addEventListener('blur', stop);

                resize();

                if (window.DEBUG) {

                    var gui = new dat.GUI();

                    // gui.add(settings, 'debug');
                    settings.gui.add(settings, 'trails', 1, 30).onChange(reset);
                    settings.gui.add(settings, 'size', 25, 75).onFinishChange(reset);
                    settings.gui.add(settings, 'friction', 0.45, 0.55).onFinishChange(reset);
                    settings.gui.add(settings, 'dampening', 0.01, 0.4).onFinishChange(reset);
                    settings.gui.add(settings, 'tension', 0.95, 0.999).onFinishChange(reset);

                    document.body.appendChild(ctx.stats.domElement);
                }
            };

        })(window);

    </script>
<audio autoplay>
	<source src="http://api.uomg.com/api/rand.music?sort=热歌榜" type="audio/mpeg">
</audio>
		<script type="text/javascript">
			$(document).ready(function(){
			    $(".xy_back").click(function () {
			        window.history.back();
			    });
			})	
		</script>
</body>
</html>