*2022年圣诞节到来啦，很高兴这次我们又能一起度过~
一、前言
时光荏苒，白驹过隙。
2022这一年又在忙碌中度过了，过去的一年，我们同努力，我们共欢笑，每一次成功都蕴藏着我们辛勤的劳动。
新的一年即将来到，我们不能停滞不前，一味只是骄傲。愿大家与时俱进，拼搏不懈，共创新的辉煌！
借着新年到来的喜庆，给大家分享一个新年烟花的前端代码，快拿着代码展示给你的朋友们看吧！！
转眼间已经到了2022的尾巴，这一年对于国家来说丰富充实,冬奥会在北京举行、中国共产党第二十次全国代表大会召开、社会共同抗击疫情的第三年、我国完成天宫空间站建造……对于我们每一个个体，2022也承载着我们的快乐与悲伤，它是无法替代的。
新的一年马上就要到了，让我们告别2022，迎接2023！
希望2023,全糖去冰。
二、跨年烟花
本文是一篇简单的前端代码，主要内容有HTML，JS，CSS等内容
- HTML代码
- JS代码
- CSS样式
- 插件等
- 可根据需求自定义文字
- 背景音乐
- 倒计时
三、效果展示
文末有完整的HTML代码，直接复制就能用。接下来我们一起来看看效果吧！！！
倒计时效果展示
2023 字体效果展示
兔圆圆 字体效果展示
五、HTML源码
- index.html
烟花，雪花，背景音乐，页面样式在这里实现的哦
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>时光荏苒，白驹过隙！</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 = 0.02;
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 = 0.000000001;
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 = 0.1 - Math.random() * 0.2;
seed.vy = -1.5; //*(1+Math.random()/2);
seed.vz = 0.1 - Math.random() * 0.2;
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 -= 0.01;
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((0.5 + Math.sin(col) * 0.5) * 16);
var g = parseInt((0.5 + Math.cos(col) * 0.5) * 16);
var b = parseInt((0.5 - Math.sin(col) * 0.5) * 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>
<div id="page_end_html">
<!--放大图片-->
<link
rel="stylesheet"
type="text/css"
href="https://blog-static.cnblogs.com/files/zouwangblog/zoom.css"
/>
<script src="https://cdn.bootcss.com/jquery/1.8.3/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.2.0/js/transition.js"></script>
<script src="https://blog-static.cnblogs.com/files/zouwangblog/zoom.js"></script>
<script type="text/javascript">
$("#cnblogs_post_body img").attr("data-action", "zoom");
</script>
<!--放大图片end-->
<!--鼠标特效-->
<script src="https://blog-static.cnblogs.com/files/zouwangblog/mouse-click.js"></script>
<canvas
width="1777"
height="841"
style="
position: fixed;
left: 0px;
top: 0px;
z-index: 2147483647;
pointer-events: none;
"
></canvas>
<!--鼠标特效 end-->
<!-- require APlayer -->
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/aplayer/dist/APlayer.min.css"
/>
<script src="https://cdn.jsdelivr.net/npm/aplayer/dist/APlayer.min.js"></script>
<!-- require MetingJS -->
<script src="https://cdn.jsdelivr.net/npm/meting@2/dist/Meting.min.js"></script>
<!-- // 随机线条 -->
<script>
!(function () {
function n(n, e, t) {
return n.getAttribute(e) || t;
}
function e(n) {
return document.getElementsByTagName(n);
}
function t() {
var t = e("script"),
o = t.length,
i = t[o - 1];
return {
l: o,
z: n(i, "zIndex", -1),
o: n(i, "opacity", 0.6),
c: n(i, "color", "148,0,211"),
n: n(i, "count", 99),
};
}
function o() {
(a = m.width =
window.innerWidth ||
document.documentElement.clientWidth ||
document.body.clientWidth),
(c = m.height =
window.innerHeight ||
document.documentElement.clientHeight ||
document.body.clientHeight);
}
function i() {
r.clearRect(0, 0, a, c);
var n, e, t, o, m, l;
s.forEach(function (i, x) {
for (
i.x += i.xa,
i.y += i.ya,
i.xa *= i.x > a || i.x < 0 ? -1 : 1,
i.ya *= i.y > c || i.y < 0 ? -1 : 1,
r.fillRect(i.x - 0.5, i.y - 0.5, 1, 1),
e = x + 1;
e < u.length;
e++
)
(n = u[e]),
null !== n.x &&
null !== n.y &&
((o = i.x - n.x),
(m = i.y - n.y),
(l = o * o + m * m),
l < n.max &&
(n === y &&
l >= n.max / 2 &&
((i.x -= 0.03 * o), (i.y -= 0.03 * m)),
(t = (n.max - l) / n.max),
r.beginPath(),
(r.lineWidth = t / 2),
(r.strokeStyle = "rgba(" + d.c + "," + (t + 0.2) + ")"),
r.moveTo(i.x, i.y),
r.lineTo(n.x, n.y),
r.stroke()));
}),
x(i);
}
var a,
c,
u,
m = document.createElement("canvas"),
d = t(),
l = "c_n" + d.l,
r = m.getContext("2d"),
x =
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (n) {
window.setTimeout(n, 1e3 / 45);
},
w = Math.random,
y = { x: null, y: null, max: 2e4 };
(m.id = l),
(m.style.cssText =
"position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o),
e("body")[0].appendChild(m),
o(),
(window.onresize = o),
(window.onmousemove = function (n) {
(n = n || window.event), (y.x = n.clientX), (y.y = n.clientY);
}),
(window.onmouseout = function () {
(y.x = null), (y.y = null);
});
for (var s = [], f = 0; d.n > f; f++) {
var h = w() * a,
g = w() * c,
v = 2 * w() - 1,
p = 2 * w() - 1;
s.push({ x: h, y: g, xa: v, ya: p, max: 6e3 });
}
(u = s.concat([y])),
setTimeout(function () {
i();
}, 100);
})();
</script>
<!-- 雪花特效 -->
<script type="text/javascript">
(function ($) {
$.fn.snow = function (options) {
var $flake = $('<div id="snowbox" />')
.css({ position: "absolute", "z-index": "9999", top: "-50px" })
.html("❄"),
documentHeight = $(document).height(),
documentWidth = $(document).width(),
defaults = {
minSize: 10,
maxSize: 20,
newOn: 1000,
flakeColor:
"#00CED1" /* 此处可以定义雪花颜色，若要白色可以改为#FFFFFF */,
},
options = $.extend({}, defaults, options);
var interval = setInterval(function () {
var startPositionLeft = Math.random() * documentWidth - 100,
startOpacity = 0.5 + Math.random(),
sizeFlake = options.minSize + Math.random() * options.maxSize,
endPositionTop = documentHeight - 200,
endPositionLeft = startPositionLeft - 500 + Math.random() * 500,
durationFall = documentHeight * 10 + Math.random() * 5000;
$flake
.clone()
.appendTo("body")
.css({
left: startPositionLeft,
opacity: startOpacity,
"font-size": sizeFlake,
color: options.flakeColor,
})
.animate(
{
top: endPositionTop,
left: endPositionLeft,
opacity: 0.2,
},
durationFall,
"linear",
function () {
$(this).remove();
}
);
}, options.newOn);
};
})(jQuery);
$(function () {
$.fn.snow({
minSize: 5 /* 定义雪花最小尺寸 */,
maxSize: 80 /* 定义雪花最大尺寸 */,
newOn: 200 /* 定义密集程度，数字越小越密集 */,
});
});
</script>
</body>
</html>
- index.js
自定义文字在这里实现的哦
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('|#countdown 3||2023|兔圆圆||#rectangle|');
// S.UI.simulate('|写|尽|千|山|落|笔|是|你|#rectangle|');
}
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();
转载：https://blog.csdn.net/m0_68539124/article/details/128435223
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