炫酷jQuery卡牌翻页时钟动画_css动画效果时分秒翻牌效果3707
实现功能的js代码
var CHANCE_SPEC, x, y;

CHANCE_SPEC = 60;
x = 0;
y = 0;

function rand(min, max) {
    return Math.floor(Math.random() * (max - min + 1) - min);
}

function drawSpec(data, x, y, w) {
    var index;

    index = (x + y * w) * 4;

    data.data[index + 0] = 0;
    data.data[index + 1] = 0;
    data.data[index + 2] = 0;
    data.data[index + 3] = 30;
}

function drawPattern(canvas, ctx, data) {
    var w, h;
    w = canvas.width;
    h = canvas.height;
    while (x < w) {
        if (rand(1, 100) < CHANCE_SPEC) {
            drawSpec(data, x, y, w);
        }
        x++;
    }
    if (x === w) {
        x = 0;
        y++;
    }
    if (y === h) {
        ctx.putImageData(data, 0, 0);
        return;
    }
    drawPattern(canvas, ctx, data);
}

function main() {
    var canvas, ctx, data;

    console.log('starting1');
    canvas = document.getElementById('my-canvas');
    ctx = canvas.getContext('2d');
    data = ctx.getImageData(0, 0, canvas.width, canvas.height);
    drawPattern(canvas, ctx, data);
    updateTime();
}

function updateTime() {
    var currentTime, seconds, minutes, hours, times, i;
    currentTime = new Date();
    times = {
        'second': currentTime.getSeconds(),
        'minute': currentTime.getMinutes(),
        'hour': currentTime.getHours()
    };
    for (type in times) {
        if (times.hasOwnProperty(type)) {
            setTimes(type, timeToString(times[type]));
        }
    }
    setTimeout(updateTime, 1000);
}

function timeToString(currentTime) {
    var t;
    t = currentTime.toString();
    if (t.length === 1) {
        return '0' + t;
    }
    return t;
}

function getPreviousTime(type) {
    return $('#' + type + '-top').text();
}

function setTimes(type, timeStr) {
    setTime(getPreviousTime(type + '-tens'), timeStr[0], type + '-tens');
    setTime(getPreviousTime(type + '-ones'), timeStr[1], type + '-ones');
}

function setTime(previousTime, newTime, type) {
    if (previousTime === newTime) {
        return;
    }
    setTimeout(function() {
        $('#' + type + '-top').text(newTime);
    },
    150);
    setTimeout(function() {
        $('.bottom-container', $('#' + type + '-bottom')).text(newTime);
    },
    365);
    animateTime(previousTime, newTime, type);
}

function animateTime(previousTime, newTime, type) {
    var top, bottom;
    top = $('#top-' + type + '-anim');
    bottom = $('#bottom-' + type + '-anim');
    $('.top-half-num', top).text(previousTime);
    $('.dropper', bottom).text(newTime);
    top.show();
    bottom.show();
    $('#top-' + type + '-anim').css('visibility', 'visible');
    $('#bottom-' + type + '-anim').css('visibility', 'visible');
    animateNumSwap(type);
    setTimeout(function() {
        hideNumSwap(type);
    },
    365);
}

function animateNumSwap(type) {
    $('#top-' + type + '-anim').toggleClass('up');
    $('#bottom-' + type + '-anim').toggleClass('down');
}

function hideNumSwap(type) {
    $('#top-' + type + '-anim').toggleClass('up');
    $('#bottom-' + type + '-anim').toggleClass('down');
    $('#top-' + type + '-anim').css('visibility', 'hidden');
    $('#bottom-' + type + '-anim').css('visibility', 'hidden');
}

$(document).ready(main);

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

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