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三款告白去给演示特效赶紧(爱心特效告白代码三款)「告白爱心表情」
序言：每当过节的时候，女朋友就抱怨我总是忘记给她买花，说程序不懂浪漫，这不我准备了几款爱心动画特效，打算当面向她表达一下。第一款：html5通过canvas实现浪漫告白爱心动画特效寓意：告白无须多么华丽的语言，一颗颗小的爱心汇聚成一颗真心，让你的另一半感受到浓浓的爱意。代码难度系数★★★新建index.html，复制以下代码保存在浏览器中打开即可。<!doctype html><html><head><meta charset="utf-8"><title>canvas 心</title><style>html, body { height: 100%; padding: 0; margin: 0; background: #000;}canvas { position: absolute; width: 100%; height: 100%;}</style></head><body><canvas id="pinkboard"></canvas><script>/ Settings /var settings = { particles: { length: 500, // maximum amount of particles duration: 2, // particle duration in sec velocity: 100, // particle velocity in pixels/sec effect: -0.75, // play with this for a nice effect size: 30, // particle size in pixels },};/ RequestAnimationFrame polyfill by Erik M?ller /(function(){var b=0;var c=["ms","moz","webkit","o"];for(var a=0;a<c.length&&!window.requestAnimationFrame;++a){window.requestAnimationFrame=window[c[a]+"RequestAnimationFrame"];window.cancelAnimationFrame=window[c[a]+"CancelAnimationFrame"]||window[c[a]+"CancelRequestAnimationFrame"]}if(!window.requestAnimationFrame){window.requestAnimationFrame=function(h,e){var d=new Date().getTime();var f=Math.max(0,16-(d-b));var g=window.setTimeout(function(){h(d+f)},f);b=d+f;return g}}if(!window.cancelAnimationFrame){window.cancelAnimationFrame=function(d){clearTimeout(d)}}}());/ Point class /var Point = (function() { function Point(x, y) { this.x = (typeof x !== 'undefined') ? x : 0; this.y = (typeof y !== 'undefined') ? y : 0; } Point.prototype.clone = function() { return new Point(this.x, this.y); }; Point.prototype.length = function(length) { if (typeof length == 'undefined') return Math.sqrt(this.x this.x + this.y this.y); this.normalize(); this.x = length; this.y = length; return this; }; Point.prototype.normalize = function() { var length = this.length(); this.x /= length; this.y /= length; return this; }; return Point;})();/ Particle class /var Particle = (function() { function Particle() { this.position = new Point(); this.velocity = new Point(); this.acceleration = new Point(); this.age = 0; } Particle.prototype.initialize = function(x, y, dx, dy) { this.position.x = x; this.position.y = y; this.velocity.x = dx; this.velocity.y = dy; this.acceleration.x = dx settings.particles.effect; this.acceleration.y = dy settings.particles.effect; this.age = 0; }; Particle.prototype.update = function(deltaTime) { this.position.x += this.velocity.x deltaTime; this.position.y += this.velocity.y deltaTime; this.velocity.x += this.acceleration.x deltaTime; this.velocity.y += this.acceleration.y deltaTime; this.age += deltaTime; }; Particle.prototype.draw = function(context, image) { function ease(t) { return (--t) t t + 1; } var size = image.width ease(this.age / settings.particles.duration); context.globalAlpha = 1 - this.age / settings.particles.duration; context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size); }; return Particle;})();/ ParticlePool class /var ParticlePool = (function() { var particles, firstActive = 0, firstFree = 0, duration = settings.particles.duration; function ParticlePool(length) { // create and populate particle pool particles = new Array(length); for (var i = 0; i < particles.length; i++) particles[i] = new Particle(); } ParticlePool.prototype.add = function(x, y, dx, dy) { particles[firstFree].initialize(x, y, dx, dy); // handle circular queue firstFree++; if (firstFree == particles.length) firstFree = 0; if (firstActive == firstFree ) firstActive++; if (firstActive == particles.length) firstActive = 0; }; ParticlePool.prototype.update = function(deltaTime) { var i; // update active particles if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].update(deltaTime); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].update(deltaTime); for (i = 0; i < firstFree; i++) particles[i].update(deltaTime); } // remove inactive particles while (particles[firstActive].age >= duration && firstActive != firstFree) { firstActive++; if (firstActive == particles.length) firstActive = 0; } }; ParticlePool.prototype.draw = function(context, image) { // draw active particles if (firstActive < firstFree) { for (i = firstActive; i < firstFree; i++) particles[i].draw(context, image); } if (firstFree < firstActive) { for (i = firstActive; i < particles.length; i++) particles[i].draw(context, image); for (i = 0; i < firstFree; i++) particles[i].draw(context, image); } }; return ParticlePool;})();/ Putting it all together /(function(canvas) { var context = canvas.getContext('2d'), particles = new ParticlePool(settings.particles.length), particleRate = settings.particles.length / settings.particles.duration, // particles/sec time; // get point on heart with -PI <= t <= PI function pointOnHeart(t) { return new Point( 160 Math.pow(Math.sin(t), 3), 130 Math.cos(t) - 50 Math.cos(2 t) - 20 Math.cos(3 t) - 10 Math.cos(4 t) + 25 ); } // creating the particle image using a dummy canvas var image = (function() { var canvas = document.createElement('canvas'), context = canvas.getContext('2d'); canvas.width = settings.particles.size; canvas.height = settings.particles.size; // helper function to create the path function to(t) { var point = pointOnHeart(t); point.x = settings.particles.size / 2 + point.x settings.particles.size / 350; point.y = settings.particles.size / 2 - point.y settings.particles.size / 350; return point; } // create the path context.beginPath(); var t = -Math.PI; var point = to(t); context.moveTo(point.x, point.y); while (t < Math.PI) { t += 0.01; // baby steps! point = to(t); context.lineTo(point.x, point.y); } context.closePath(); // create the fill context.fillStyle = '#ea80b0'; context.fill(); // create the image var image = new Image(); image.src = canvas.toDataURL(); return image; })(); // render that thing! function render() { // next animation frame requestAnimationFrame(render); // update time var newTime = new Date().getTime() / 1000, deltaTime = newTime - (time || newTime); time = newTime; // clear canvas context.clearRect(0, 0, canvas.width, canvas.height); // create new particles var amount = particleRate deltaTime; for (var i = 0; i < amount; i++) { var pos = pointOnHeart(Math.PI - 2 Math.PI Math.random()); var dir = pos.clone().length(settings.particles.velocity); particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y); } // update and draw particles particles.update(deltaTime); particles.draw(context, image); } // handle (re-)sizing of the canvas function onResize() { canvas.width = canvas.clientWidth; canvas.height = canvas.clientHeight; } window.onresize = onResize; // delay rendering bootstrap setTimeout(function() { onResize(); render(); }, 10);})(document.getElementById('pinkboard'));</script></body></html>第二款：html5通过canvas实现爱心气球上升动画特效寓意：将想说的话打开一颗颗的爱心气球上，随着气球不断的升空，让整个氛围可更加地缠绵，看到此处可以有感动的泪水。代码难度系数★★★新建index.html，复制以下代码保存在浏览器中打开即可。<!doctype html><html><head><meta charset="utf-8"><title>情人节快乐:)</title><style>canvas {position: absolute;top: 0;left: 0;}</style></head><body><canvas id=c></canvas><script>var w = c.width = window.innerWidth,h = c.height = window.innerHeight,ctx = c.getContext( '2d' ),opts = {phrases: [ "Don't die\nit's not hard", "You're the Best", "Every day,\nYou're beautiful", "Every occasion,\nYou're clever", "A world without You?\nNah", "Keep kicking ass", "You're better than them,\nwhoever they are", "You're just amazing", "You are,\ntherefore I am", "Nothing better than You \ncould have happened to the world" ],balloons: 10,baseVelY: -1,addedVelY: -1,baseVelX: -.25,addedVelX: .5,baseSize: 20,addedSize: 10,baseSizeAdder: 2,addedSizeAdder: 2,baseIncrementer: .01,addedIncrementer: .03,baseHue: -10,addedHue: 30,font: '15px Verdana'},cycle = 0,balloons = [];ctx.font = opts.font;function Balloon(){this.reset();}Balloon.prototype.reset = function(){this.size = opts.baseSize + opts.addedSize Math.random();this.sizeAdder = opts.baseSizeAdder + opts.addedSizeAdder Math.random();this.incrementer = opts.baseIncrementer + opts.addedIncrementer Math.random();this.tick = 0;this.x = Math.random() w;this.y = h + this.size;this.vx = opts.baseVelX + opts.addedVelX Math.random();this.vy = opts.baseVelY + opts.addedVelY Math.random();this.color = 'hsla(hue,70%,60%,.8)'.replace( 'hue', opts.baseHue + opts.addedHue Math.random() );this.phrase = opts.phrases[ ++cycle % opts.phrases.length ].split( '\n' );this.lengths = [];for( var i = 0; i < this.phrase.length; ++i )this.lengths.push( -ctx.measureText( this.phrase[ i ] ).width / 2 );}Balloon.prototype.step = function(){this.tick += this.incrementer;this.x += this.vx;this.y += this.vy;var size = this.size + this.sizeAdder Math.sin( this.tick );ctx.lineWidth = size / 40;ctx.strokeStyle = '#eee';ctx.beginPath();ctx.moveTo( this.x, this.y - 2 );ctx.lineTo( this.x, this.y + size );ctx.stroke();ctx.fillStyle = this.color;ctx.translate( this.x, this.y );ctx.rotate( Math.PI / 4 );//ctx.fillRect( -size / 2, -size / 2, size / 2, size / 2 );ctx.beginPath();ctx.moveTo( 0, 0 );ctx.arc( -size / 2, -size / 2 + size / 4, size / 4, Math.PI / 2, Math.PI 3 / 2 );ctx.arc( -size / 2 + size / 4, -size / 2, size / 4, Math.PI, Math.PI 2 );ctx.lineTo( 0, 0 );ctx.fill();ctx.rotate( -Math.PI / 4 );ctx.translate( -this.x, -this.y );ctx.translate( this.x, this.y + size + 15 );ctx.scale( size / this.size, size / this.size );ctx.fillStyle = '#eee';for( var i = 0; i < this.phrase.length; ++i )ctx.fillText( this.phrase[ i ], this.lengths[ i ], i 15 );ctx.scale( this.size / size, this.size / size );ctx.translate( -this.x, -( this.y + size + 15 ) );if( this.y < -size 3 )this.reset();}function anim(){window.requestAnimationFrame( anim );ctx.fillStyle = '#222';ctx.fillRect( 0, 0, w, h );if( balloons.length < opts.balloons && Math.random() < .01 )balloons.push( new Balloon );for( var i = 0; i < balloons.length; ++i )balloons[ i ].step();}anim();</script></body></html>第三款：jQuery+css3实现爱心雨动画特效寓意：天空中下起了爱心雨，衬托的房间变得温暖，也让整个场景都变得温馨无比，想必此时可以有一个大大的拥抱。代码难度系数★★★代码有image、js和html，所以不好贴出来，有需要的朋友直接问我要吧。总结：程序员的工作本身就很枯燥，特定找了几个好看的特效拿出来和大家分享，希望大家能够快乐每一天，上述代码亲测可用，欢迎点赞收藏。《完》大家如果喜欢的话麻烦点赞、关注、转发，谢谢大家。
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