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今天是女神节,送给所有女神们一句话:
爱自己是终生浪漫的开始,无论何时都要好好爱自己
目录
今天我们来写表白爱心代码
首先HTML里body只要写两行代码就可以了,后面都是js代码了
我们的样式css代码如下:
首先我们先定义一个Settings
RequestAnimationFrame polyfill by Erik M?ller
Point class
Particle class
ParticlePool class
create and populate particle pool
handle circular queue
update active particles
remove inactive particles
draw active particles
Putting it all together
get point on heart with -PI <= t <= PI
creating the particle image using a dummy canvas
helper function to create the path
create the path
update and draw particles
delay rendering bootstrap
- <!DOCTYPE html>
- <html>
- <head>
- <title></title>
- </head>
- <style>
- * {
- padding: 0;
- margin: 0;
- }
- html,
- body {
- height: 100%;
- padding: 0;
- margin: 0;
- background: rgb(253, 253, 253);
- }
- canvas {
- position: absolute;
- width: 100%;
- height: 100%;
- }
- .aa {
- position: fixed;
- left: 50%;
- bottom: 10px;
- color: #ccc;
- }
- h1{
- text-align: center;
- padding-top: 100px;
- }
- </style>
- <body>
- <h1>女神节快乐!</h1>
- <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 = "red";
- 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>
好了,这就是全部爱心代码了
今天是三八女神节,无论是小妹妹还是大姐姐,我都想对我的同性说:生活处处充满美好,无论身处什么逆境,都应该往前看,一切都会过去的,我们女性大部分都会因为感情,学业,家庭的等困扰所影响,我一直觉得感情应该以佛系的态度看待,学业,努力向上我觉得就很幸福,自己想要的自己去努力争取,不去依附她人,做自己的女王,你就是这个世界最闪闪发光的人!!!
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