今天給大家?guī)韼讉€(gè)好看的基于 HTML+CSS+JS 的煙花特效
雪花 、 櫻花 、 浪漫賀卡 以及 圣誕樹 我前段時(shí)間剛做過，感興趣的也可以看看我前幾期的博客：
雪花：https://haiyong.blog.csdn.net/article/details/105786233
櫻花：https://haiyong.blog.csdn.net/article/details/122008942
圣誕樹和賀卡：https://haiyong.blog.csdn.net/article/details/122024043
演示地址：http://haiyong.site/fireworks1
這里的HTML代碼很簡短
<div><canvas id="canvas"></canvas></div>
CSS代碼
css也只有這兩段內(nèi)容
body{
background:black;
overflow:hidden;
margin:0;}canvas{
background:#000;} JS代碼
所有的源碼都在這里了，復(fù)制粘貼即可
window.addEventListener("resize", resizeCanvas, false);window.addEventListener("DOMContentLoaded", onLoad, false);window.requestAnimationFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {window.setTimeout(callback, 1000/60);};
var canvas, ctx, w, h, particles = [], probability = 0.04, xPoint, yPoint;
function onLoad() { canvas = document.getElementById("canvas"); ctx = canvas.getContext("2d"); resizeCanvas();
window.requestAnimationFrame(updateWorld);
}
function resizeCanvas() { if (!!canvas) { w = canvas.width = window.innerWidth; h = canvas.height = window.innerHeight; }
}
function updateWorld() { update(); paint(); window.requestAnimationFrame(updateWorld);
}
function update() { if (particles.length < 500 && Math.random() < probability) { createFirework(); } var alive = []; for (var i=0; i<particles.length; i++) { if (particles[i].move()) { alive.push(particles[i]); } } particles = alive;
}
function paint() { ctx.globalCompositeOperation = 'source-over'; ctx.fillStyle = "rgba(0,0,0,0.2)"; ctx.fillRect(0, 0, w, h); ctx.globalCompositeOperation = 'lighter'; for (var i=0; i<particles.length; i++) { particles[i].draw(ctx); }
}
function createFirework() { xPoint = Math.random()*(w-200)+100; yPoint = Math.random()*(h-200)+100; var nFire = Math.random()*50+100; var c = "rgb("+(~~(Math.random()*200+55))+"," +(~~(Math.random()*200+55))+","+(~~(Math.random()*200+55))+")"; for (var i=0; i<nFire; i++) { var particle = new Particle(); particle.color = c; var vy = Math.sqrt(25-particle.vx*particle.vx); if (Math.abs(particle.vy) > vy) { particle.vy = particle.vy>0 ? vy: -vy; } particles.push(particle); }
}
function Particle() { this.w = this.h = Math.random()*4+1;
this.x = xPoint-this.w/2; this.y = yPoint-this.h/2;
this.vx = (Math.random()-0.5)*10; this.vy = (Math.random()-0.5)*10;
this.alpha = Math.random()*.5+.5;
this.color;
}
Particle.prototype = { gravity: 0.05, move: function () { this.x += this.vx; this.vy += this.gravity; this.y += this.vy; this.alpha -= 0.01; if (this.x <= -this.w || this.x >= screen.width || this.y >= screen.height || this.alpha <= 0) { return false; } return true; }, draw: function (c) { c.save(); c.beginPath();
c.translate(this.x+this.w/2, this.y+this.h/2); c.arc(0, 0, this.w, 0, Math.PI*2); c.fillStyle = this.color; c.globalAlpha = this.alpha;
c.closePath(); c.fill(); c.restore(); }
} 演示地址：http://haiyong.site/fireworks2（需要使用電腦打開，沒做響應(yīng)式手機(jī)端打開一片黑，或者可以看看后面的煙花）
這里的HTML代碼還是一樣的簡短
<div id="jsi-fireworks-container" class="container"></div>
CSS代碼
css也只有這三段內(nèi)容
html, body{width: 100%;height: 100%;margin: 0;padding: 0;overflow: hidden;background-color: #101010;}.container{position: absolute;width: 500px;height: 500px;top: 50%;left: 50%;margin-top: -250px;margin-left: -250px;}canvas{position: absolute;top: 0;left: 0;} JS代碼
JS代碼比較長，我這里放了一部分，需要完整源碼的可以關(guān)注公眾號【海擁】回復(fù)【煙花】
var RENDERER = {LEAF_INTERVAL_RANGE : {min : 100, max : 200},FIREWORK_INTERVAL_RANGE : {min : 20, max : 200},SKY_COLOR : 'hsla(210, 60%, %luminance%, 0.2)',STAR_COUNT : 100,init : function(){this.setParameters();this.reconstructMethod();this.createTwigs();this.createStars();this.render();},setParameters : function(){this.$container = $('#jsi-fireworks-container');this.width = this.$container.width();this.height = this.$container.height();this.distance = Math.sqrt(Math.pow(this.width / 2, 2) + Math.pow(this.height / 2, 2));this.contextFireworks = $('<canvas />').attr({width : this.width, height : this.height}).appendTo(this.$container).get(0).getContext('2d');this.contextTwigs = $('<canvas />').attr({width : this.width, height : this.height}).appendTo(this.$container).get(0).getContext('2d');this.twigs = [];this.leaves = [new LEAF(this.width, this.height, this)];this.stars = [];this.fireworks = [new FIREWORK(this.width, this.height, this)];this.leafInterval = this.getRandomValue(this.LEAF_INTERVAL_RANGE) | 0;this.maxFireworkInterval = this.getRandomValue(this.FIREWORK_INTERVAL_RANGE) | 0;this.fireworkInterval = this.maxFireworkInterval;},reconstructMethod : function(){this.render = this.render.bind(this);},getRandomValue : function(range){return range.min + (range.max - range.min) * Math.random();},createTwigs : function(){this.twigs.push(new TWIG(this.width, this.height, 0, 0, Math.PI * 3 / 4, 0));this.twigs.push(new TWIG(this.width, this.height, this.width, 0, -Math.PI * 3 / 4, Math.PI));this.twigs.push(new TWIG(this.width, this.height, 0, this.height, Math.PI / 4, Math.PI));this.twigs.push(new TWIG(this.width, this.height, this.width, this.height, -Math.PI / 4, 0));},createStars : function(){for(var i = 0, length = this.STAR_COUNT; i < length; i++){this.stars.push(new STAR(this.width, this.height, this.contextTwigs, this));}},render : function(){requestAnimationFrame(this.render);var maxOpacity = 0,
contextTwigs = this.contextTwigs,
contextFireworks = this.contextFireworks;for(var i = this.fireworks.length - 1; i >= 0; i--){
maxOpacity = Math.max(maxOpacity, this.fireworks[i].getOpacity());}
contextTwigs.clearRect(0, 0, this.width, this.height);
contextFireworks.fillStyle = this.SKY_COLOR.replace('%luminance', 5 + maxOpacity * 15);
contextFireworks.fillRect(0, 0, this.width, this.height);for(var i = this.fireworks.length - 1; i >= 0; i--){if(!this.fireworks[i].render(contextFireworks)){this.fireworks.splice(i, 1);}}for(var i = this.stars.length - 1; i >= 0; i--){this.stars[i].render(contextTwigs);}for(var i = this.twigs.length - 1; i >= 0; i--){this.twigs[i].render(contextTwigs);}for(var i = this.leaves.length - 1; i >= 0; i--){if(!this.leaves[i].render(contextTwigs)){this.leaves.splice(i, 1);}}if(--this.leafInterval == 0){this.leaves.push(new LEAF(this.width, this.height, this));this.leafInterval = this.getRandomValue(this.LEAF_INTERVAL_RANGE) | 0;}if(--this.fireworkInterval == 0){this.fireworks.push(new FIREWORK(this.width, this.height, this));this.maxFireworkInterval = this.getRandomValue(this.FIREWORK_INTERVAL_RANGE) | 0;this.fireworkInterval = this.maxFireworkInterval;}}}; 演示地址：http://haiyong.site/fireworks3
HTML代碼：
<canvas id="canvas"></canvas>
CSS代碼
body{
background-color: #000;}canvas{
display: block;
margin: auto;
-webkit-tap-highlight-color:rgba(0,0,0,0);
-webkit-user-select:none; } 完整JS代碼
(function() {
var Fireworks, GRAVITY, K, SPEED, ToRadian, canvas, context, ctx, fireBoss, repeat, stage;
canvas = document.getElementById("canvas");
context = canvas.getContext("2d");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
stage = new createjs.Stage(canvas);
stage.autoClear = false;
ctx = canvas.getContext("2d");
ctx.fillStyle = "rgba(0, 0, 0, 0)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
createjs.Ticker.setFPS(50);
createjs.Touch.enable(stage);
stage.update();
// 重力
GRAVITY = 1;
// 抵抗
K = 0.9;
// 速度
SPEED = 12;
// 從度數(shù)轉(zhuǎn)換為弧度
ToRadian = function(degree) {return degree * Math.PI / 180.0;
};
// 制作煙花的class
Fireworks = class Fireworks {constructor(sx = 100, sy = 100, particles = 70) { var circle, i, j, rad, ref, speed; this.sx = sx; this.sy = sy; this.particles = particles; this.sky = new createjs.Container(); this.r = 0; this.h = Math.random() * 360 | 0; this.s = 100; this.l = 50; this.size = 3; for (i = j = 0, ref = this.particles; (0 <= ref ? j < ref : j > ref); i = 0 <= ref ? ++j : --j) {speed = Math.random() * 12 + 2;circle = new createjs.Shape();circle.graphics.f(`hsla(${this.h}, ${this.s}%, ${this.l}%, 1)`).dc(0, 0, this.size);circle.snapToPixel = true;circle.compositeOperation = "lighter";rad = ToRadian(Math.random() * 360 | 0);circle.set({ x: this.sx, y: this.sy, vx: Math.cos(rad) * speed, vy: Math.sin(rad) * speed, rad: rad});this.sky.addChild(circle); } stage.addChild(this.sky);}explode() { var circle, j, p, ref; if (this.sky) {++this.h;for (p = j = 0, ref = this.sky.getNumChildren(); (0 <= ref ? j < ref : j > ref); p = 0 <= ref ? ++j : --j) { circle = this.sky.getChildAt(p); // 加速度 circle.vx = circle.vx * K; circle.vy = circle.vy * K; // 位置計(jì)算 circle.x += circle.vx; circle.y += circle.vy + GRAVITY; this.l = Math.random() * 100; // 粒度 this.size = this.size - 0.001; if (this.size > 0) {circle.graphics.c().f(`hsla(${this.h}, 100%, ${this.l}%, 1)`).dc(0, 0, this.size); }}if (this.sky.alpha > 0.1) { this.sky.alpha -= K / 50;} else { stage.removeChild(this.sky); this.sky = null;} } else { }}
};
fireBoss = [];
setInterval(function() {ctx.fillStyle = "rgba(0, 0, 0, 0.1)";ctx.fillRect(0, 0, canvas.width, canvas.height);
}, 40);
setInterval(function() {var x, y;x = Math.random() * canvas.width | 0;y = Math.random() * canvas.height | 0;fireBoss.push(new Fireworks(x, y));return fireBoss.push(new Fireworks(x, y));
}, 1300);
repeat = function() {var fireworks, j, ref;for (fireworks = j = 0, ref = fireBoss.length; (0 <= ref ? j < ref : j > ref); fireworks = 0 <= ref ? ++j : --j) { if (fireBoss[fireworks].sky) {fireBoss[fireworks].explode(); }}stage.update();
};
createjs.Ticker.on("tick", repeat);
stage.addEventListener("stagemousedown", function() {fireBoss.push(new Fireworks(stage.mouseX, stage.mouseY));return fireBoss.push(new Fireworks(stage.mouseX, stage.mouseY));
});}).call(this); 演示地址：http://haiyong.site/fireworks4
<canvas id="canvas"></canvas>
CSS代碼
html,body{
margin:0px;
width:100%;
height:100%;
overflow:hidden;
background:#000;}#canvas{
width:100%;
height:100%;} 部分JS代碼
JS代碼比較長我就不全列出來了，需要完整源碼可以點(diǎn)擊此處下載本篇文章所有源碼：
function initVars(){
pi=Math.PI;
ctx=canvas.getContext("2d");
canvas.width=canvas.clientWidth;
canvas.height=canvas.clientHeight;
cx=canvas.width/2;
cy=canvas.height/2;
playerZ=-25;
playerX=playerY=playerVX=playerVY=playerVZ=pitch=yaw=pitchV=yawV=0;
scale=600;
seedTimer=0;seedInterval=5,seedLife=100;gravity=.02;
seeds=new Array();
sparkPics=new Array();
s="https://cantelope.org/NYE/";
for(i=1;i<=10;++i){sparkPic=new Image();sparkPic.src=s+"spark"+i+".png";sparkPics.push(sparkPic);
}
sparks=new Array();
pow1=new Audio(s+"pow1.ogg");
pow2=new Audio(s+"pow2.ogg");
pow3=new Audio(s+"pow3.ogg");
pow4=new Audio(s+"pow4.ogg");
frames = 0;}function rasterizePoint(x,y,z){
var p,d;
x-=playerX;
y-=playerY;
z-=playerZ;
p=Math.atan2(x,z);
d=Math.sqrt(x*x+z*z);
x=Math.sin(p-yaw)*d;
z=Math.cos(p-yaw)*d;
p=Math.atan2(y,z);
d=Math.sqrt(y*y+z*z);
y=Math.sin(p-pitch)*d;
z=Math.cos(p-pitch)*d;
var rx1=-1000,ry1=1,rx2=1000,ry2=1,rx3=0,ry3=0,rx4=x,ry4=z,uc=(ry4-ry3)*(rx2-rx1)-(rx4-rx3)*(ry2-ry1);
if(!uc) return {x:0,y:0,d:-1};
var ua=((rx4-rx3)*(ry1-ry3)-(ry4-ry3)*(rx1-rx3))/uc;
var ub=((rx2-rx1)*(ry1-ry3)-(ry2-ry1)*(rx1-rx3))/uc;
if(!z)z=.000000001;
if(ua>0&&ua<1&&ub>0&&ub<1){return { x:cx+(rx1+ua*(rx2-rx1))*scale, y:cy+y/z*scale, d:Math.sqrt(x*x+y*y+z*z)};
}else{return { x:cx+(rx1+ua*(rx2-rx1))*scale, y:cy+y/z*scale, d:-1};
}}function spawnSeed(){
seed=new Object();
seed.x=-50+Math.random()*100;
seed.y=25;
seed.z=-50+Math.random()*100;
seed.vx=.1-Math.random()*.2;
seed.vy=-1.5;//*(1+Math.random()/2);
seed.vz=.1-Math.random()*.2;
seed.born=frames;
seeds.push(seed);} 演示地址：http://haiyong.site/fireworks5
<div id="WebGL-output"></div>
CSS代碼
body { margin: 0; overflow: hidden; background: -webkit-linear-gradient(0deg, rgb(0, 12, 91), rgb(0, 0, 0)); background: linear-gradient(0deg, rgb(0, 12, 91), rgb(0, 0, 0));
} 部分JS代碼
JS代碼比較長我就不全列出來了，需要完整源碼可以參見文章末尾兩種獲取源碼方式
let scene,camera,renderer,orbitControls,planeMesh,canvasTexture,isAutoLaunch = true;const gravity = new THREE.Vector3(0, -0.005, 0);const friction = 0.998;const noise = new SimplexNoise();const textureSize = 128.0;const fireworksInstances = [];let outputDom;const getOffsetXYZ = i => {
const offset = 3;
const index = i * offset;
const x = index;
const y = index + 1;
const z = index + 2;
return { x, y, z };};const getOffsetRGBA = i => {
const offset = 4;
const index = i * offset;
const r = index;
const g = index + 1;
const b = index + 2;
const a = index + 3;
return { r, g, b, a };};const gui = new dat.GUI();const guiControls = new function () {
this.ParticleSize = 300;
this.AutoLaunch = true;}();gui.add(guiControls, 'ParticleSize', 100, 600);gui.add(guiControls, 'AutoLaunch').onChange(e => {
isAutoLaunch = e;
outputDom.style.cursor = isAutoLaunch ? 'auto' : 'pointer';});const getRandomNum = (max = 0, min = 0) => Math.floor(Math.random() * (max + 1 - min)) + min;const launchFireWorks = () => {
if (fireworksInstances.length > 5) return;
const fw = Math.random() > 8 ? new BasicFIreWorks() : new RichFIreWorks();
fireworksInstances.push(fw);
scene.add(fw.meshGroup);};const autoLaunch = () => {
if (!isAutoLaunch) return;
if (Math.random() > 0.7) launchFireWorks();};const drawRadialGradation = (ctx, canvasRadius, canvasW, canvasH) => {
ctx.save();
const gradient = ctx.createRadialGradient(canvasRadius, canvasRadius, 0, canvasRadius, canvasRadius, canvasRadius);
gradient.addColorStop(0.0, 'rgba(255,255,255,1.0)');
gradient.addColorStop(0.5, 'rgba(255,255,255,0.5)');
gradient.addColorStop(1.0, 'rgba(255,255,255,0)');
ctx.fillStyle = gradient;
ctx.fillRect(0, 0, canvasW, canvasH);
ctx.restore();};const getTexture = () => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const diameter = textureSize;
canvas.width = diameter;
canvas.height = diameter;
const canvasRadius = diameter / 2;
drawRadialGradation(ctx, canvasRadius, canvas.width, canvas.height);
const texture = new THREE.Texture(canvas);
texture.type = THREE.FloatType;
texture.needsUpdate = true;
return texture;};canvasTexture = getTexture();const getPointMesh = (num, vels, type) => {
const bufferGeometry = new THREE.BufferGeometry();
const vertices = [];
const velocities = [];
const colors = [];
const adjustSizes = [];
const masses = [];
const colorType = Math.random() > 0.3 ? 'single' : 'multiple';
const singleColor = getRandomNum(100, 20) * 0.01;
const multipleColor = () => getRandomNum(100, 1) * 0.01;
let rgbType;
const rgbTypeDice = Math.random();
if (rgbTypeDice > 0.66) {rgbType = 'red';
} else if (rgbTypeDice > 0.33) {rgbType = 'green';
} else {rgbType = 'blue';
}
for (let i = 0; i < num; i++) {const pos = new THREE.Vector3(0, 0, 0);vertices.push(pos.x, pos.y, pos.z);velocities.push(vels[i].x, vels[i].y, vels[i].z);if (type === 'seed') { let size; if (type === 'trail') {size = Math.random() * 0.1 + 0.1; } else {size = Math.pow(vels[i].y, 2) * 0.04; } if (i === 0) size *= 1.1; adjustSizes.push(size); masses.push(size * 0.017); colors.push(1.0, 1.0, 1.0, 1.0);} else { const size = getRandomNum(guiControls.ParticleSize, 10) * 0.001; adjustSizes.push(size); masses.push(size * 0.017); if (colorType === 'multiple') {colors.push(multipleColor(), multipleColor(), multipleColor(), 1.0); } else {switch (rgbType) { case 'red':colors.push(singleColor, 0.1, 0.1, 1.0);break; case 'green':colors.push(0.1, singleColor, 0.1, 1.0);break; case 'blue':colors.push(0.1, 0.1, singleColor, 1.0);break; default:colors.push(singleColor, 0.1, 0.1, 1.0);} }}
}
bufferGeometry.addAttribute('position', new THREE.Float32BufferAttribute(vertices, 3).setDynamic(true));
bufferGeometry.addAttribute('velocity', new THREE.Float32BufferAttribute(velocities, 3).setDynamic(true));
bufferGeometry.addAttribute('color', new THREE.Float32BufferAttribute(colors, 4).setDynamic(true));
bufferGeometry.addAttribute('adjustSize', new THREE.Float32BufferAttribute(adjustSizes, 1).setDynamic(true));
bufferGeometry.addAttribute('mass', new THREE.Float32BufferAttribute(masses, 1).setDynamic(true));
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