基于HTML5的js构造爱心，动态时间校准
刚学web开发不久，练习用。
有关HTML5的一些知识现在开始了解，动手一下。
代码是给哥们写的，成品还是不错的。
index，HTML文档
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>小葱和海蔚的一周年</title> <style type="text/css"> @font-face { font-family: digit; src: url('digital-7_mono.ttf') format("truetype"); } </style> <link href="css/default.css" type="text/css" rel="stylesheet"> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript" src="js/garden.js"></script> <script type="text/javascript" src="js/functions.js"></script> </head> <body> <div id="mainDiv"> <div id="content"> <div id="code"> <span class="comments">/**</span><br /> <span class="space"/><span class="comments">*2013-05-21,</span><br /> <span class="space"/><span class="comments">*2014-05-21.</span><br /> <span class="space"/><span class="comments">*/</span><br /> Boy name = <span class="keyword">Mr</span> Ye<br /> Girl name = <span class="keyword">Mrs</span> Luo<br /> <span class="comments">// Fall in love river. </span><br /> The boy love the girl;<br /> <span class="comments">// They love each other.</span><br /> The girl loved the boy;<br /> <span class="comments">// AS time goes on.</span><br /> The boy can not be separated the girl;<br /> <span class="comments">// At the same time.</span><br /> The girl can not be separated the boy;<br /> <span class="comments">// Both wind and snow all over the sky.</span><br /> <span class="comments">// Whether on foot or 5 kilometers.</span><br /> <span class="keyword">The boy</span> very <span class="keyword">happy</span>;<br /> <span class="keyword">The girl</span> is also very <span class="keyword">happy</span>;<br /> <span class="placeholder"/><span class="comments">// Whether it is right now</span><br /> <span class="placeholder"/><span class="comments">// Still in the distant future.</span><br /> <span class="placeholder"/>The boy has but one dream;<br /> <span class="comments">// The boy wants the girl could well have been happy.</span><br /> <br> <br> I want to say:<br /> Baby, I love you forever;<br /> </div> <div id="loveHeart"> <canvas id="garden"></canvas> <div id="words"> <div id="messages"> 相恋容易，相爱不易 一年携手，好好继续 且行且珍惜 <div id="elapseClock"></div> </div> <div id="loveu"> 爱你直到永永远远。<br/> <div class="signature">- 永远爱你的小葱葱</div> </div> </div> </div> </div> <div id="copyright"> <a href="#">....</a><br /> <a href="#">....</a><br /> </div> </div> <script type="text/javascript"> var offsetX = $("#loveHeart").width() / 2; var offsetY = $("#loveHeart").height() / 2 - 55; var together = new Date(); together.setFullYear(2013, 4, 21); together.setHours(20); together.setMinutes(0); together.setSeconds(0); together.setMilliseconds(0); if (!document.createElement('canvas').getContext) { var msg = document.createElement("div"); msg.id = "errorMsg"; msg.innerHTML = "Your browser doesn't support HTML5!<br/>Recommend use Chrome 14+/IE 9+/Firefox 7+/Safari 4+"; document.body.appendChild(msg); $("#code").css("display", "none") $("#copyright").css("position", "absolute"); $("#copyright").css("bottom", "10px"); document.execCommand("stop"); } else { setTimeout(function () { startHeartAnimation(); }, 5000); timeElapse(together); setInterval(function () { timeElapse(together); }, 500); adjustCodePosition(); $("#code").typewriter(); } </script> </body> </html>/致老叶及嫂子
javascript代码，构造及函数主题
//function
var $window = $(window), gardenCtx, gardenCanvas, $garden, garden; var clientWidth = $(window).width(); var clientHeight = $(window).height(); $(function () { // setup garden $loveHeart = $("#loveHeart"); var offsetX = $loveHeart.width() / 5; var offsetY = $loveHeart.height() / 5 - 21; $garden = $("#garden"); gardenCanvas = $garden[0]; gardenCanvas.width = $("#loveHeart").width(); gardenCanvas.height = $("#loveHeart").height() gardenCtx = gardenCanvas.getContext("2d"); gardenCtx.globalCompositeOperation = "lighter"; garden = new Garden(gardenCtx, gardenCanvas); $("#content").css("width", $loveHeart.width() + $("#code").width()); $("#content").css("height", Math.max($loveHeart.height(), $("#code").height())); $("#content").css("margin-top", Math.max(($window.height() - $("#content").height()) / 5, 21)); $("#content").css("margin-left", Math.max(($window.width() - $("#content").width()) / 5, 21)); // renderLoop setInterval(function () { garden.render(); }, Garden.options.growSpeed); }); $(window).resize(function() { var newWidth = $(window).width(); var newHeight = $(window).height(); if (newWidth != clientWidth && newHeight != clientHeight) { location.replace(location); } }); function getHeartPoint(angle) { var t = angle / Math.PI; var x = 19.5 * (16 * Math.pow(Math.sin(t), 3)); var y = - 20 * (13 * Math.cos(t) - 5 * Math.cos(2 * t) - 2 * Math.cos(3 * t) - Math.cos(4 * t)); return new Array(offsetX + x, offsetY + y); } function startHeartAnimation() { var interval = 50; var angle = 10; var heart = new Array(); var animationTimer = setInterval(function () { var bloom = getHeartPoint(angle); var draw = true; for (var i = 0; i < heart.length; i++) { var p = heart[i]; var distance = Math.sqrt(Math.pow(p[0] - bloom[0], 2) + Math.pow(p[1] - bloom[1], 2)); if (distance < Garden.options.bloomRadius.max * 1.3) { draw = false; break; } } if (draw) { heart.push(bloom); garden.createRandomBloom(bloom[0], bloom[1]); } if (angle >= 30) { clearInterval(animationTimer); showMessages(); } else { angle += 0.2; } }, interval); } (function($) { $.fn.typewriter = function() { this.each(function() { var $ele = $(this), str = $ele.html(), progress = 0; $ele.html(''); var timer = setInterval(function() { var current = str.substr(progress, 1); if (current == '<') { progress = str.indexOf('>', progress) + 1; } else { progress++; } $ele.html(str.substring(0, progress) + (progress & 1 ? '_' : '')); if (progress >= str.length) { clearInterval(timer); } }, 75); }); return this; }; })(jQuery); function timeElapse(date){ var current = Date(); var seconds = (Date.parse(current) - Date.parse(date)) / 1000; var days = Math.floor(seconds / (3600 * 24)); seconds = seconds % (3600 * 24); var hours = Math.floor(seconds / 3600); if (hours < 10) { hours = "0" + hours; } seconds = seconds % 3600; var minutes = Math.floor(seconds / 60); if (minutes < 10) { minutes = "0" + minutes; } seconds = seconds % 60; if (seconds < 10) { seconds = "0" + seconds; } var result = "<span class=\"digit\">" + days + "</span> days <span class=\"digit\">" + hours + "</span> hours <span class=\"digit\">" + minutes + "</span> minutes <span class=\"digit\">" + seconds + "</span> seconds"; $("#elapseClock").html(result); } function showMessages() { adjustWordsPosition(); $('#messages').fadeIn(5000, function() { showLoveU(); }); } function adjustWordsPosition() { $('#words').css("position", "absolute"); $('#words').css("top", $("#garden").position().top + 195); $('#words').css("left", $("#garden").position().left + 70); } function adjustCodePosition() { $('#code').css("margin-top", ($("#garden").height() - $("#code").height()) / 2); } function showLoveU() { $('#loveu').fadeIn(3000); } //garden function Vector(x, y) { this.x = x; this.y = y; }; Vector.prototype = { rotate: function (theta) { var x = this.x; var y = this.y; this.x = Math.cos(theta) * x - Math.sin(theta) * y; this.y = Math.sin(theta) * x + Math.cos(theta) * y; return this; }, mult: function (f) { this.x *= f; this.y *= f; return this; }, clone: function () { return new Vector(this.x, this.y); }, length: function () { return Math.sqrt(this.x * this.x + this.y * this.y); }, subtract: function (v) { this.x -= v.x; this.y -= v.y; return this; }, set: function (x, y) { this.x = x; this.y = y; return this; } }; function Petal(stretchA, stretchB, startAngle, angle, growFactor, bloom) { this.stretchA = stretchA; this.stretchB = stretchB; this.startAngle = startAngle; this.angle = angle; this.bloom = bloom; this.growFactor = growFactor; this.r = 1; this.isfinished = false; //this.tanAngleA = Garden.random(-Garden.degrad(Garden.options.tanAngle), Garden.degrad(Garden.options.tanAngle)); //this.tanAngleB = Garden.random(-Garden.degrad(Garden.options.tanAngle), Garden.degrad(Garden.options.tanAngle)); } Petal.prototype = { draw: function () { var ctx = this.bloom.garden.ctx; var v1, v2, v3, v4; v1 = new Vector(0, this.r).rotate(Garden.degrad(this.startAngle)); v2 = v1.clone().rotate(Garden.degrad(this.angle)); v3 = v1.clone().mult(this.stretchA); //.rotate(this.tanAngleA); v4 = v2.clone().mult(this.stretchB); //.rotate(this.tanAngleB); ctx.strokeStyle = this.bloom.c; ctx.beginPath(); ctx.moveTo(v1.x, v1.y); ctx.bezierCurveTo(v3.x, v3.y, v4.x, v4.y, v2.x, v2.y); ctx.stroke(); }, render: function () { if (this.r <= this.bloom.r) { this.r += this.growFactor; // / 10; this.draw(); } else { this.isfinished = true; } } } function Bloom(p, r, c, pc, garden) { this.p = p; this.r = r; this.c = c; this.pc = pc; this.petals = []; this.garden = garden; this.init(); this.garden.addBloom(this); } Bloom.prototype = { draw: function () { var p, isfinished = true; this.garden.ctx.save(); this.garden.ctx.translate(this.p.x, this.p.y); for (var i = 0; i < this.petals.length; i++) { p = this.petals[i]; p.render(); isfinished *= p.isfinished; } this.garden.ctx.restore(); if (isfinished == true) { this.garden.removeBloom(this); } }, init: function () { var angle = 360 / this.pc; var startAngle = Garden.randomInt(0, 90); for (var i = 0; i < this.pc; i++) { this.petals.push(new Petal(Garden.random(Garden.options.petalStretch.min, Garden.options.petalStretch.max), Garden.random(Garden.options.petalStretch.min, Garden.options.petalStretch.max), startAngle + i * angle, angle, Garden.random(Garden.options.growFactor.min, Garden.options.growFactor.max), this)); } } } function Garden(ctx, element) { this.blooms = []; this.element = element; this.ctx = ctx; } Garden.prototype = { render: function () { for (var i = 0; i < this.blooms.length; i++) { this.blooms[i].draw(); } }, addBloom: function (b) { this.blooms.push(b); }, removeBloom: function (b) { var bloom; for (var i = 0; i < this.blooms.length; i++) { bloom = this.blooms[i]; if (bloom === b) { this.blooms.splice(i, 1); return this; } } }, createRandomBloom: function (x, y) { this.createBloom(x, y, Garden.randomInt(Garden.options.bloomRadius.min, Garden.options.bloomRadius.max), Garden.randomrgba(Garden.options.color.rmin, Garden.options.color.rmax, Garden.options.color.gmin, Garden.options.color.gmax, Garden.options.color.bmin, Garden.options.color.bmax, Garden.options.color.opacity), Garden.randomInt(Garden.options.petalCount.min, Garden.options.petalCount.max)); }, createBloom: function (x, y, r, c, pc) { new Bloom(new Vector(x, y), r, c, pc, this); }, clear: function () { this.blooms = []; this.ctx.clearRect(0, 0, this.element.width, this.element.height); } } Garden.options = { petalCount: { min: 8, max: 15 }, petalStretch: { min: 0.1, max: 3 }, growFactor: { min: 0.1, max: 1 }, bloomRadius: { min: 8, max: 10 }, density: 10, growSpeed: 1000 / 60, color: { rmin: 128, rmax: 255, gmin: 0, gmax: 128, bmin: 0, bmax: 128, opacity: 0.1 }, tanAngle: 60 }; Garden.random = function (min, max) { return Math.random() * (max - min) + min; }; Garden.randomInt = function (min, max) { return Math.floor(Math.random() * (max - min + 1)) + min; }; Garden.circle = 2 * Math.PI; Garden.degrad = function (angle) { return Garden.circle / 360 * angle; }; Garden.raddeg = function (angle) { return angle / Garden.circle * 360; }; Garden.rgba = function (r, g, b, a) { return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')'; }; Garden.randomrgba = function (rmin, rmax, gmin, gmax, bmin, bmax, a) { var r = Math.round(Garden.random(rmin, rmax)); var g = Math.round(Garden.random(gmin, gmax)); var b = Math.round(Garden.random(bmin, bmax)); var limit = 5; if (Math.abs(r - g) <= limit && Math.abs(g - b) <= limit && Math.abs(b - r) <= limit) { return Garden.rgba(rmin, rmax, gmin, gmax, bmin, bmax, a); } else { return Garden.rgba(r, g, b, a); } };
