不同语言编写的绚丽烟花
- 一： 简单Html先来一个简单的形象实现烟花（绝对绚丽）
- 二：HTML Canvas(内含js)
- 三：js烟花效果
- 四：用python实现的烟花（可以选择背景）
一： 简单Html先来一个简单的形象实现烟花（绝对绚丽）
先看效果
源码
代码语言：javascript复制<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>html5 canvas除夕烟花</title><base target="_blank" />
<link rel="stylesheet" type="text/css" href="http://hovertree.com/texiao/html5/43/css/normalize.css" />
<link rel="stylesheet" type="text/css" href="http://hovertree.com/texiao/html5/43/css/hovertree.css">
</head>
<body>
<div class="hovertree"></div>
<script type="text/javascript" src="http://down.hovertree.com/jquery/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="http://hovertree.com/texiao/html5/43/js/jquery.fireworks.js"></script>
<script type="text/javascript">
$('.hovertree').fireworks({
sound: true, // sound effect
opacity: 0.9,
width: '100%',
height: '100%'
});
</script>
<div style="width:340px;position:fixed;z-index:99;"><a href="http://hovertree.com/"></a> <a href="http://hovertree.com/h/bjag/me34x8fk.htm"></a></div>
</body>
</html>二：HTML Canvas(内含js)
我们先看实现效果
源码如下，一共三百多行
代码语言：javascript复制<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>除夕炫彩</title>
<style>
html,body{
margin:0px;
width:100%;
height:100%;
overflow:hidden;
background:#000;
}
</style>
</head>
<body>
<canvas id="canvas" style="position:absolute;width:100%;height:100%;z-index:8888"></canvas>
<canvas style="position:absolute;width:100%;height:100%;z-index:9999" class="canvas" ></canvas>
<div class="overlay">
<div class="tabs">
<div class="tabs-labels"><span class="tabs-label">Commands</span><span class="tabs-label">Info</span><span class="tabs-label">Share</span></div>
<div class="tabs-panels">
<ul class="tabs-panel commands">
</ul>
</div>
</div>
</div>
<script>
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);
}
function splode(x,y,z){
t=5 parseInt(Math.random()*150);
sparkV=1 Math.random()*2.5;
type=parseInt(Math.random()*3);
switch(type){
case 0:
pic1=parseInt(Math.random()*10);
break;
case 1:
pic1=parseInt(Math.random()*10);
do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);
break;
case 2:
pic1=parseInt(Math.random()*10);
do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);
do{ pic3=parseInt(Math.random()*10); }while(pic3==pic1 || pic3==pic2);
break;
}
for(m=1;m<t; m){
spark=new Object();
spark.x=x; spark.y=y; spark.z=z;
p1=pi*2*Math.random();
p2=pi*Math.random();
v=sparkV*(1 Math.random()/6)
spark.vx=Math.sin(p1)*Math.sin(p2)*v;
spark.vz=Math.cos(p1)*Math.sin(p2)*v;
spark.vy=Math.cos(p2)*v;
switch(type){
case 0: spark.img=sparkPics[pic1]; break;
case 1:
spark.img=sparkPics[parseInt(Math.random()*2)?pic1:pic2];
break;
case 2:
switch(parseInt(Math.random()*3)){
case 0: spark.img=sparkPics[pic1]; break;
case 1: spark.img=sparkPics[pic2]; break;
case 2: spark.img=sparkPics[pic3]; break;
}
break;
}
spark.radius=25 Math.random()*50;
spark.alpha=1;
spark.trail=new Array();
sparks.push(spark);
}
switch(parseInt(Math.random()*4)){
case 0: pow=new Audio(s "pow1.ogg"); break;
case 1: pow=new Audio(s "pow2.ogg"); break;
case 2: pow=new Audio(s "pow3.ogg"); break;
case 3: pow=new Audio(s "pow4.ogg"); break;
}
d=Math.sqrt((x-playerX)*(x-playerX) (y-playerY)*(y-playerY) (z-playerZ)*(z-playerZ));
pow.volume=1.5/(1 d/10);
pow.play();
}
function doLogic(){
if(seedTimer<frames){
seedTimer=frames seedInterval*Math.random()*10;
spawnSeed();
}
for(i=0;i<seeds.length; i){
seeds[i].vy =gravity;
seeds[i].x =seeds[i].vx;
seeds[i].y =seeds[i].vy;
seeds[i].z =seeds[i].vz;
if(frames-seeds[i].born>seedLife){
splode(seeds[i].x,seeds[i].y,seeds[i].z);
seeds.splice(i,1);
}
}
for(i=0;i<sparks.length; i){
if(sparks[i].alpha>0 && sparks[i].radius>5){
sparks[i].alpha-=.01;
sparks[i].radius/=1.02;
sparks[i].vy =gravity;
point=new Object();
point.x=sparks[i].x;
point.y=sparks[i].y;
point.z=sparks[i].z;
if(sparks[i].trail.length){
x=sparks[i].trail[sparks[i].trail.length-1].x;
y=sparks[i].trail[sparks[i].trail.length-1].y;
z=sparks[i].trail[sparks[i].trail.length-1].z;
d=((point.x-x)*(point.x-x) (point.y-y)*(point.y-y) (point.z-z)*(point.z-z));
if(d>9){
sparks[i].trail.push(point);
}
}else{
sparks[i].trail.push(point);
}
if(sparks[i].trail.length>5)sparks[i].trail.splice(0,1);
sparks[i].x =sparks[i].vx;
sparks[i].y =sparks[i].vy;
sparks[i].z =sparks[i].vz;
sparks[i].vx/=1.075;
sparks[i].vy/=1.075;
sparks[i].vz/=1.075;
}else{
sparks.splice(i,1);
}
}
p=Math.atan2(playerX,playerZ);
d=Math.sqrt(playerX*playerX playerZ*playerZ);
d =Math.sin(frames/80)/1.25;
t=Math.sin(frames/200)/40;
playerX=Math.sin(p t)*d;
playerZ=Math.cos(p t)*d;
yaw=pi p t;
}
function rgb(col){
var r = parseInt((.5 Math.sin(col)*.5)*16);
var g = parseInt((.5 Math.cos(col)*.5)*16);
var b = parseInt((.5-Math.sin(col)*.5)*16);
return "#" r.toString(16) g.toString(16) b.toString(16);
}
function draw(){
ctx.clearRect(0,0,cx*2,cy*2);
ctx.fillStyle="#ff8";
for(i=-100;i<100;i =3){
for(j=-100;j<100;j =4){
x=i;z=j;y=25;
point=rasterizePoint(x,y,z);
if(point.d!=-1){
size=250/(1 point.d);
d = Math.sqrt(x * x z * z);
a = 0.75 - Math.pow(d / 100, 6) * 0.75;
if(a>0){
ctx.globalAlpha = a;
ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
}
}
ctx.globalAlpha=1;
for(i=0;i<seeds.length; i){
point=rasterizePoint(seeds[i].x,seeds[i].y,seeds[i].z);
if(point.d!=-1){
size=200/(1 point.d);
ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
point1=new Object();
for(i=0;i<sparks.length; i){
point=rasterizePoint(sparks[i].x,sparks[i].y,sparks[i].z);
if(point.d!=-1){
size=sparks[i].radius*200/(1 point.d);
if(sparks[i].alpha<0)sparks[i].alpha=0;
if(sparks[i].trail.length){
point1.x=point.x;
point1.y=point.y;
switch(sparks[i].img){
case sparkPics[0]:ctx.strokeStyle="#f84";break;
case sparkPics[1]:ctx.strokeStyle="#84f";break;
case sparkPics[2]:ctx.strokeStyle="#8ff";break;
case sparkPics[3]:ctx.strokeStyle="#fff";break;
case sparkPics[4]:ctx.strokeStyle="#4f8";break;
case sparkPics[5]:ctx.strokeStyle="#f44";break;
case sparkPics[6]:ctx.strokeStyle="#f84";break;
case sparkPics[7]:ctx.strokeStyle="#84f";break;
case sparkPics[8]:ctx.strokeStyle="#fff";break;
case sparkPics[9]:ctx.strokeStyle="#44f";break;
}
for(j=sparks[i].trail.length-1;j>=0;--j){
point2=rasterizePoint(sparks[i].trail[j].x,sparks[i].trail[j].y,sparks[i].trail[j].z);
if(point2.d!=-1){
ctx.globalAlpha=j/sparks[i].trail.length*sparks[i].alpha/2;
ctx.beginPath();
ctx.moveTo(point1.x,point1.y);
ctx.lineWidth=1 sparks[i].radius*10/(sparks[i].trail.length-j)/(1 point2.d);
ctx.lineTo(point2.x,point2.y);
ctx.stroke();
point1.x=point2.x;
point1.y=point2.y;
}
}
}
ctx.globalAlpha=sparks[i].alpha;
ctx.drawImage(sparks[i].img,point.x-size/2,point.y-size/2,size,size);
}
}
}
function frame(){
if(frames>100000){
seedTimer=0;
frames=0;
}
frames ;
draw();
doLogic();
requestAnimationFrame(frame);
}
window.addEventListener("resize",()=>{
canvas.width=canvas.clientWidth;
canvas.height=canvas.clientHeight;
cx=canvas.width/2;
cy=canvas.height/2;
});
initVars();
frame();
</script>
<script src="js/index.js"></script>
</body>
</html>下面是引用的js源码，js渲染需要比较多的代码。
代码语言：javascript复制var S = {
init: function () {
var action = window.location.href,
i = action.indexOf('?a=');
S.Drawing.init('.canvas');
document.body.classList.add('body--ready');
if (i !== -1) {
S.UI.simulate(decodeURI(action).substring(i 3));
} else {
S.UI.simulate('除夕节日快乐');
}
S.Drawing.loop(function () {
S.Shape.render();
});
}
};
S.Drawing = (function () {
var canvas,
context,
renderFn
requestFrame = window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(callback) {
window.setTimeout(callback, 1000 / 60);
};
return {
init: function (el) {
canvas = document.querySelector(el);
context = canvas.getContext('2d');
this.adjustCanvas();
window.addEventListener('resize', function (e) {
S.Drawing.adjustCanvas();
});
},
loop: function (fn) {
renderFn = !renderFn ? fn : renderFn;
this.clearFrame();
renderFn();
requestFrame.call(window, this.loop.bind(this));
},
adjustCanvas: function () {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
},
clearFrame: function () {
context.clearRect(0, 0, canvas.width, canvas.height);
},
getArea: function () {
return { w: canvas.width, h: canvas.height };
},
drawCircle: function (p, c) {
context.fillStyle = c.render();
context.beginPath();
context.arc(p.x, p.y, p.z, 0, 2 * Math.PI, true);
context.closePath();
context.fill();
}
}
}());
S.UI = (function () {
var canvas = document.querySelector('.canvas'),
interval,
isTouch = false, //('ontouchstart' in window || navigator.msMaxTouchPoints),
currentAction,
resizeTimer,
time,
maxShapeSize = 30,
firstAction = true,
sequence = [],
cmd = '#';
function formatTime(date) {
var h = date.getHours(),
m = date.getMinutes(),
m = m < 10 ? '0' m : m;
return h ':' m;
}
function getValue(value) {
return value && value.split(' ')[1];
}
function getAction(value) {
value = value && value.split(' ')[0];
return value && value[0] === cmd && value.substring(1);
}
function timedAction(fn, delay, max, reverse) {
clearInterval(interval);
currentAction = reverse ? max : 1;
fn(currentAction);
if (!max || (!reverse && currentAction < max) || (reverse && currentAction > 0)) {
interval = setInterval(function () {
currentAction = reverse ? currentAction - 1 : currentAction 1;
fn(currentAction);
if ((!reverse && max && currentAction === max) || (reverse && currentAction === 0)) {
clearInterval(interval);
}
}, delay);
}
}
function reset(destroy) {
clearInterval(interval);
sequence = [];
time = null;
destroy && S.Shape.switchShape(S.ShapeBuilder.letter(''));
}
function performAction(value) {
var action,
value,
current;
// overlay.classList.remove('overlay--visible');
sequence = typeof(value) === 'object' ? value : sequence.concat(value.split('|'));
// input.value = '';
// checkInputWidth();
timedAction(function (index) {
current = sequence.shift();
action = getAction(current);
value = getValue(current);
switch (action) {
case 'countdown':
value = parseInt(value) || 10;
value = value > 0 ? value : 10;
timedAction(function (index) {
if (index === 0) {
if (sequence.length === 0) {
S.Shape.switchShape(S.ShapeBuilder.letter(''));
} else {
performAction(sequence);
}
} else {
S.Shape.switchShape(S.ShapeBuilder.letter(index), true);
}
}, 1000, value, true);
break;
case 'rectangle':
value = value && value.split('x');
value = (value && value.length === 2) ? value : [maxShapeSize, maxShapeSize / 2];
S.Shape.switchShape(S.ShapeBuilder.rectangle(Math.min(maxShapeSize, parseInt(value[0])), Math.min(maxShapeSize, parseInt(value[1]))));
break;
case 'circle':
value = parseInt(value) || maxShapeSize;
value = Math.min(value, maxShapeSize);
S.Shape.switchShape(S.ShapeBuilder.circle(value));
break;
case 'time':
var t = formatTime(new Date());
if (sequence.length > 0) {
S.Shape.switchShape(S.ShapeBuilder.letter(t));
} else {
timedAction(function () {
t = formatTime(new Date());
if (t !== time) {
time = t;
S.Shape.switchShape(S.ShapeBuilder.letter(time));
}
}, 1000);
}
break;
default:
S.Shape.switchShape(S.ShapeBuilder.letter(current[0] === cmd ? 'What?' : current));
}
}, 2000, sequence.length);
}
function checkInputWidth(e) {
if (input.value.length > 18) {
ui.classList.add('ui--wide');
} else {
ui.classList.remove('ui--wide');
}
if (firstAction && input.value.length > 0) {
ui.classList.add('ui--enter');
} else {
ui.classList.remove('ui--enter');
}
}
function bindEvents() {
document.body.addEventListener('keydown', function (e) {
input.focus();
if (e.keyCode === 13) {
firstAction = false;
reset();
performAction(input.value);
}
});
canvas.addEventListener('click', function (e) {
overlay.classList.remove('overlay--visible');
});
}
function init() {
bindEvents();
// input.focus();
isTouch && document.body.classList.add('touch');
}
// Init
init();
return {
simulate: function (action) {
performAction(action);
}
}
}());
S.UI.Tabs = (function () {
var tabs = document.querySelector('.tabs'),
labels = document.querySelector('.tabs-labels'),
triggers = document.querySelectorAll('.tabs-label'),
panels = document.querySelectorAll('.tabs-panel');
function activate(i) {
triggers[i].classList.add('tabs-label--active');
panels[i].classList.add('tabs-panel--active');
}
function bindEvents() {
labels.addEventListener('click', function (e) {
var el = e.target,
index;
if (el.classList.contains('tabs-label')) {
for (var t = 0; t < triggers.length; t ) {
triggers[t].classList.remove('tabs-label--active');
panels[t].classList.remove('tabs-panel--active');
if (el === triggers[t]) {
index = t;
}
}
activate(index);
}
});
}
function init() {
activate(0);
bindEvents();
}
// Init
init();
}());
S.Point = function (args) {
this.x = args.x;
this.y = args.y;
this.z = args.z;
this.a = args.a;
this.h = args.h;
};
S.Color = function (r, g, b, a) {
this.r = r;
this.g = g;
this.b = b;
this.a = a;
};
S.Color.prototype = {
render: function () {
return 'rgba(' this.r ',' this.g ',' this.b ',' this.a ')';
}
};
S.Dot = function (x, y) {
this.p = new S.Point({
x: x,
y: y,
z: 5,
a: 1,
h: 0
});
this.e = 0.07;
this.s = true;
this.c = new S.Color(255, 255, 255, this.p.a);
this.t = this.clone();
this.q = [];
};
S.Dot.prototype = {
clone: function () {
return new S.Point({
x: this.x,
y: this.y,
z: this.z,
a: this.a,
h: this.h
});
},
_draw: function () {
this.c.a = this.p.a;
S.Drawing.drawCircle(this.p, this.c);
},
_moveTowards: function (n) {
var details = this.distanceTo(n, true),
dx = details[0],
dy = details[1],
d = details[2],
e = this.e * d;
if (this.p.h === -1) {
this.p.x = n.x;
this.p.y = n.y;
return true;
}
if (d > 1) {
this.p.x -= ((dx / d) * e);
this.p.y -= ((dy / d) * e);
} else {
if (this.p.h > 0) {
this.p.h--;
} else {
return true;
}
}
return false;
},
_update: function () {
if (this._moveTowards(this.t)) {
var p = this.q.shift();
if (p) {
this.t.x = p.x || this.p.x;
this.t.y = p.y || this.p.y;
this.t.z = p.z || this.p.z;
this.t.a = p.a || this.p.a;
this.p.h = p.h || 0;
} else {
if (this.s) {
this.p.x -= Math.sin(Math.random() * 3.142);
this.p.y -= Math.sin(Math.random() * 3.142);
} else {
this.move(new S.Point({
x: this.p.x (Math.random() * 50) - 25,
y: this.p.y (Math.random() * 50) - 25,
}));
}
}
}
d = this.p.a - this.t.a;
this.p.a = Math.max(0.1, this.p.a - (d * 0.05));
d = this.p.z - this.t.z;
this.p.z = Math.max(1, this.p.z - (d * 0.05));
},
distanceTo: function (n, details) {
var dx = this.p.x - n.x,
dy = this.p.y - n.y,
d = Math.sqrt(dx * dx dy * dy);
return details ? [dx, dy, d] : d;
},
move: function (p, avoidStatic) {
if (!avoidStatic || (avoidStatic && this.distanceTo(p) > 1)) {
this.q.push(p);
}
},
render: function () {
this._update();
this._draw();
}
}
S.ShapeBuilder = (function () {
var gap = 13,
shapeCanvas = document.createElement('canvas'),
shapeContext = shapeCanvas.getContext('2d'),
fontSize = 500,
fontFamily = 'Avenir, Helvetica Neue, Helvetica, Arial, sans-serif';
function fit() {
shapeCanvas.width = Math.floor(window.innerWidth / gap) * gap;
shapeCanvas.height = Math.floor(window.innerHeight / gap) * gap;
shapeContext.fillStyle = 'red';
shapeContext.textBaseline = 'middle';
shapeContext.textAlign = 'center';
}
function processCanvas() {
var pixels = shapeContext.getImageData(0, 0, shapeCanvas.width, shapeCanvas.height).data;
dots = [],
pixels,
x = 0,
y = 0,
fx = shapeCanvas.width,
fy = shapeCanvas.height,
w = 0,
h = 0;
for (var p = 0; p < pixels.length; p = (4 * gap)) {
if (pixels[p 3] > 0) {
dots.push(new S.Point({
x: x,
y: y
}));
w = x > w ? x : w;
h = y > h ? y : h;
fx = x < fx ? x : fx;
fy = y < fy ? y : fy;
}
x = gap;
if (x >= shapeCanvas.width) {
x = 0;
y = gap;
p = gap * 4 * shapeCanvas.width;
}
}
return { dots: dots, w: w fx, h: h fy };
}
function setFontSize(s) {
shapeContext.font = 'bold ' s 'px ' fontFamily;
}
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
function init() {
fit();
window.addEventListener('resize', fit);
}
// Init
init();
return {
imageFile: function (url, callback) {
var image = new Image(),
a = S.Drawing.getArea();
image.onload = function () {
shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
shapeContext.drawImage(this, 0, 0, a.h * 0.6, a.h * 0.6);
callback(processCanvas());
};
image.onerror = function () {
callback(S.ShapeBuilder.letter('What?'));
}
image.src = url;
},
circle: function (d) {
var r = Math.max(0, d) / 2;
shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
shapeContext.beginPath();
shapeContext.arc(r * gap, r * gap, r * gap, 0, 2 * Math.PI, false);
shapeContext.fill();
shapeContext.closePath();
return processCanvas();
},
letter: function (l) {
var s = 0;
setFontSize(fontSize);
s = Math.min(fontSize,
(shapeCanvas.width / shapeContext.measureText(l).width) * 0.8 * fontSize,
(shapeCanvas.height / fontSize) * (isNumber(l) ? 1 : 0.45) * fontSize);
setFontSize(s);
shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
shapeContext.fillText(l, shapeCanvas.width / 2, shapeCanvas.height / 2);
return processCanvas();
},
rectangle: function (w, h) {
var dots = [],
width = gap * w,
height = gap * h;
for (var y = 0; y < height; y = gap) {
for (var x = 0; x < width; x = gap) {
dots.push(new S.Point({
x: x,
y: y,
}));
}
}
return { dots: dots, w: width, h: height };
}
};
}());
S.Shape = (function () {
var dots = [],
width = 0,
height = 0,
cx = 0,
cy = 0;
function compensate() {
var a = S.Drawing.getArea();
cx = a.w / 2 - width / 2;
cy = a.h / 2 - height / 2;
}
return {
shuffleIdle: function () {
var a = S.Drawing.getArea();
for (var d = 0; d < dots.length; d ) {
if (!dots[d].s) {
dots[d].move({
x: Math.random() * a.w,
y: Math.random() * a.h
});
}
}
},
switchShape: function (n, fast) {
var size,
a = S.Drawing.getArea();
width = n.w;
height = n.h;
compensate();
if (n.dots.length > dots.length) {
size = n.dots.length - dots.length;
for (var d = 1; d <= size; d ) {
dots.push(new S.Dot(a.w / 2, a.h / 2));
}
}
var d = 0,
i = 0;
while (n.dots.length > 0) {
i = Math.floor(Math.random() * n.dots.length);
dots[d].e = fast ? 0.25 : (dots[d].s ? 0.14 : 0.11);
if (dots[d].s) {
dots[d].move(new S.Point({
z: Math.random() * 20 10,
a: Math.random(),
h: 18
}));
} else {
dots[d].move(new S.Point({
z: Math.random() * 5 5,
h: fast ? 18 : 30
}));
}
dots[d].s = true;
dots[d].move(new S.Point({
x: n.dots[i].x cx,
y: n.dots[i].y cy,
a: 1,
z: 5,
h: 0
}));
n.dots = n.dots.slice(0, i).concat(n.dots.slice(i 1));
d ;
}
for (var i = d; i < dots.length; i ) {
if (dots[i].s) {
dots[i].move(new S.Point({
z: Math.random() * 20 10,
a: Math.random(),
h: 20
}));
dots[i].s = false;
dots[i].e = 0.04;
dots[i].move(new S.Point({
x: Math.random() * a.w,
y: Math.random() * a.h,
a: 0.3, //.4
z: Math.random() * 4,
h: 0
}));
}
}
},
render: function () {
for (var d = 0; d < dots.length; d ) {
dots[d].render();
}
}
}
}());
S.init();如果你不希望有ui界面上的文字，要纯的烟花，可以在js文件中将 S.UI.simulate(‘除夕节日快乐’);进行注释。
三：js烟花效果
还是先看效果，录制的效果不太好，自己可以去尝试，也是非常好看的。
下面看源码,z这个比较简单，因为没有那么多渲染
代码语言：javascript复制<!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>
<title>超炫网页烟花效果</title>
</head>
<style type="text/css">
.fire{
display:block;
overflow:hidden;
font-size:12px;
position:absolute;
}
body{
overflow:hidden;
background:#000;
}
html{
overflow:hidden;
background:#000;
}
</style>
<body>
</body>
<script type="text/javascript">
var Fire = function(r, color) {
this.radius = r || 12;
this.color = color;
this.xpos = 0;
this.ypos = 0;
this.zpos = 0;
this.vx = 0;
this.vy = 0;
this.vz = 0;
this.mass = 1;
this.x =0;
this.y=0;
this.p = document.createElement("span");
this.p.className = "fire";
this.p.innerHTML = "*";
this.p.style.fontSize = this.radius "px";
this.p.style.color = "#" this.color;
}
Fire.prototype = {
append: function(parent) {
parent.appendChild(this.p);
},
setSize: function(scale) {
this.p.style.fontSize = this.radius * scale "px";
},
setPosition:function(x, y) {
this.p.style.left = x "px";
this.p.style.top = y "px";
},
setVisible: function(b) {
this.p.style.display = b ? "block" : "none";
}
}
var fireworks = function() {
var fires = new Array();
var count = 150;
var fl = 250;
var vpx = 500;
var vpy = 300;
var gravity = .5;
var floor = 200;
var bounce = -.8;
var timer;
var wind = ((Math.floor(Math.random()*3) 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
var wpos = 0;
var wcount;
return {
init: function() {
wcount = 50 Math.floor(Math.random() * 100);
for (var i=0; i<count; i ) {
var color = 0xFF0000;
color = (Math.random() * 0xFFFFFF).toString(16).toString().split(".")[0];
while(color.length < 6) {
color = "0" color;
}
var fire = new Fire(12, color);
fires.push(fire);
fire.ypos = -100;
fire.vz = Math.random() * 6 - 3;
fire.vx = (Math.random()*2 - 1)*2 ;
fire.vy = Math.random()*-15 - 15;
fire.x = 500
fire.y = 600;
fire.append(document.body);
}
var that = this;
timer = setInterval(function() {
wpos ;
if (wpos >= wcount) {
wpos = 0;
wcount = 50 Math.floor(Math.random() * 100);
wind = ((Math.floor(Math.random()*3) 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
}
for (var i=0;i<count; i ) {
that.move(fires[i]);
}
}, 30);
},
move: function(fire) {
fire.vy = gravity;
fire.x = fire.vx;
fire.y = fire.vy;
fire.vx = wind;
fire.setPosition(fire.x, fire.y);
if (fire.x < 0 || fire.x >1000 || fire.y < 0 || fire.y > 600) {
fire.vx = (Math.random()*2 - 1)*2;
fire.vy = Math.random()*-15 - 15;
fire.x = 500;
fire.y = 600;
fire.setPosition(fire.x, fire.y);
}
}
}
}
fireworks().init();
</script>
</html>四：用python实现的烟花（可以选择背景）
还是先看效果
源码如下 main.py
代码语言：javascript复制import tkinter as tk
from PIL import Image, ImageTk
from time import time, sleep
from random import choice, uniform, randint
from particle import Particle
# 颜色选项
colors = ['red', 'blue', 'yellow', 'white', 'green', 'orange', 'purple', 'seagreen', 'indigo', 'cornflowerblue']
HEIGHT = 800
WIDTH = 1200
def simulate(cv):
"""
循环调用保持不停
"""
t = time()
explode_points = []
wait_time = randint(10, 100)
numb_explode = randint(5, 50)
# 创建一个所有粒子同时扩大的二维列表
for point in range(numb_explode):
objects = []
x_cordi = randint(0.05 * WIDTH, 0.95 * WIDTH)
y_cordi = randint(0.05 * HEIGHT, 0.95 * HEIGHT)
speed = uniform(0.2, 2.)
size = uniform(0.2, 3)
color = choice(colors)
explosion_speed = uniform(0.1, 0.5)
explosion_radius = randint(5, 15)
total_particles = randint(20, 50)
for i in range(1, total_particles):
r = Particle(cv, idx=i, total=total_particles, explosion_speed=explosion_speed, explosion_radius=explosion_radius,
x=x_cordi, y=y_cordi, vx=speed, vy=speed, color=color, size=size, lifespan=abs(uniform(0.2, 1.75)))
objects.append(r)
explode_points.append(objects)
total_time = .0
# 1.8s内一直扩大
while total_time < 1.8:
sleep(0.01)
tnew = time()
t, dt = tnew, tnew - t
for point in explode_points:
for item in point:
item.update(dt)
cv.update()
total_time = dt
# 循环调用
root.after(wait_time, simulate, cv)
def close(*ignore):
"""退出程序、关闭窗口"""
global root
root.quit()
if __name__ == '__main__':
root = tk.Tk()
cv = tk.Canvas(root, height=HEIGHT, width=WIDTH)
image = Image.open("D:\python\pydoc\pystudy\project1\fireworks-master\__pycache__\g.jpg")
photo = ImageTk.PhotoImage(image)
cv.create_image(0, 0, image=photo, anchor='nw')
cv.pack()
root.protocol("WM_DELETE_WINDOW", close)
root.after(100, simulate, cv)
root.mainloop()particle.py
代码语言：javascript复制from math import sin, cos, radians
# 模拟重力
GRAVITY = 0.1
class Particle(object):
def __init__(self, cv, idx, total, explosion_speed, explosion_radius=1, x=0., y=0., vx=0., vy=0., size=2., color='red', lifespan=2):
"""
粒子在空中随机生成随机，变成一个圈、下坠、消失
属性:
- id: 粒子的id
- x, y: 粒子的坐标
- vx, vy: 在坐标的变化速度
- total: 总数
- age: 粒子存在的时长
- color: 颜色
- cv: 画布
- lifespan: 最高存在时长
"""
self.id = idx
self.x = x
self.y = y
self.initial_speed = explosion_speed
self.explosion_radius = explosion_radius
self.vx = vx
self.vy = vy
self.total = total
self.age = 0
self.color = color
self.cv = cv
self.cid = self.cv.create_oval(
x - size, y - size, x size,
y size, fill=self.color)
self.lifespan = lifespan
def update(self, dt):
self.age = dt
# 粒子范围扩大
if self.alive() and self.expand():
move_x = cos(radians(self.id * 360 / self.total)) * self.initial_speed
move_y = sin(radians(self.id * 360 / self.total)) * self.initial_speed
self.cv.move(self.cid, move_x * self.explosion_radius, move_y * self.explosion_radius)
self.vx = move_x / (float(dt) * 1000)
# 以自由落体坠落
elif self.alive():
move_x = cos(radians(self.id * 360 / self.total))
# we technically don't need to update x, y because move will do the job
self.cv.move(self.cid, self.vx move_x, self.vy GRAVITY * dt)
self.vy = GRAVITY * dt
# 移除超过最高时长的粒子
elif self.cid is not None:
self.cv.delete(self.cid)
self.cid = None
# 扩大的时间
def expand(self):
return self.age <= 1.2
# 粒子是否在最高存在时长内
def alive(self):
return self.age <= self.lifespan然后自己存放一个放置图片的路径即可
