canvas星空背景特效+CSS旋转相册学习
今天在看帖子的时候，看到了个有趣的css旋转相册，刚好之前做了一个星空背景dome，这里给大家分享下代码：
旋转相册参考：https://blog.csdn.net/gitchatxiaomi/article/details/108474015?utm_medium=distribute.pc_category.none-task-blog-hot-7.nonecase
dome下载地址（点击下载）
具体代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>canvas星空背景相册dome</title>
<style type="text/css">
html{
width: 100%;
height: 100%;
}
.bigbox{
width: 10px;
height: 10px;
margin: 200px 400px;
position: relative;
z-index: 1;
}
.box{
width:600px;
height:600px;
margin: 0 auto;
transform-style: preserve-3d;
transform: rotateX(-30deg) rotateY(-80deg);
-webkit-animation: mystyle 15s infinite;
animation-timing-function: linear;
}
@-webkit-keyframes mystyle{
from{transform: rotateX(-180deg) rotateY(-180deg);}
to{transform: rotateX(180deg) rotateY(180deg);}
}
.box div{
position: absolute;
width: 200px;
height: 200px;
opacity: 0.8;
transition: all .4s;
}
.bigpic{
width: 200px;
height: 200px;
}
.box .bigfront{
transform: rotateY(0deg) translateZ(100px);
}
.box .bigback{
transform: translateZ(-100px) rotateY(180deg);
}
.box .bigleft{
transform: rotateY(90deg) translateZ(100px);
}
.box .bigright{
transform: rotateY(-90deg) translateZ(100px);
}
.box .bigtop{
transform: rotateX(90deg) translateZ(100px);
}
.box .bigbottom{
transform: rotateX(-90deg) translateZ(100px);
}
.box span{
display: block;
position: absolute;
width: 140px;
height: 140px;
top: 25px;
left: 25px;
}
.box .smallpic{
width: 140px;
height: 140px;
}
.box .smallleft{
transform: rotateY(90deg) translateZ(70px);
}
.box .smallright{
transform: rotateY(-90deg) translateZ(70px);
}
.box .smalltop{
transform: rotateX(90deg) translateZ(70px);
}
.box .smallbottom{
transform: rotateX(-90deg) translateZ(70px);
}
.box .smallfront{
transform: rotateY(0deg) translateZ(70px);
}
.box .smallback{
transform: translateZ(-70px) rotateY(180deg);
}
/*:hover 我们之前说过的一个css选择器，能够让鼠标指向的时候触发*/
.box:hover .bigleft{
transform: rotateY(90deg) translateZ(300px);
}
.box:hover .bigright{
transform: rotateY(-90deg) translateZ(300px);
}
.box:hover .bigtop{
transform: rotateX(90deg) translateZ(300px);
}
.box:hover .bigbottom{
transform: rotateX(-90deg) translateZ(300px);
}
.box:hover .bigfront{
transform: rotateY(0deg) translateZ(300px);
}
.box:hover .bigback{
transform: translateZ(-300px) rotateY(180deg);
}
body,p,div,ol,ul,li,dl,dt,dd,h1,h2,h3,h4,h5,h6,form,input,iframe,nav {
margin: 0;
padding: 0;
}
html,body {
width: 100%;
height: 100%;
overflow: hidden;
}
body {
font: 14px Microsoft YaHei;
-webkit-text-size-adjust:100%;
-moz-user-select: none;
-webkit-user-select: none;
user-select: none;
position: relative;
background: #000;
}
#canvas {
width: 100%;
height: 100%;
display: block;
opacity: .8;
position: absolute;
top: 0;
left: 0;
z-index: 0;
}
</style>
</head>
<body>
<div class="bigbox">
<div class="box">
<div class="bigfront">
<img src="image/1.jpg" class="bigpic" >
</div>
<div class="bigback">
<img src="image/2.jpg" class="bigpic">
</div>
<div class="bigleft">
<img src="image/3.jpg" class="bigpic">
</div>
<div class="bigright">
<img src="image/4.jpg" class="bigpic">
</div>
<div class="bigtop">
<img src="image/5.jpg" class="bigpic">
</div>
<div class="bigbottom">
<img src="image/6.jpg" class="bigpic">
</div>
<span class="smallfront">
<img src="image/7.jpg" class="smallpic" />
</span>
<span class="smallback">
<img src="image/8.jpg" class="smallpic" />
</span>
<span class="smallleft">
<img src="image/9.jpg" class="smallpic" />
</span>
<span class="smallright">
<img src="image/10.jpg" class="smallpic" />
</span>
<span class="smalltop">
<img src="image/11.jpg" class="smallpic" />
</span>
<span class="smallbottom">
<img src="image/12.jpg" class="smallpic" />
</span>
</div>
</div>
<canvas id="canvas"></canvas>
</body>
<script>
//宇宙特效
var canvas = document.getElementById('canvas'),
ctx = canvas.getContext('2d'),
w = canvas.width = window.innerWidth,
h = canvas.height = window.innerHeight,
hue = 217,
stars = [],
count = 0,
maxStars = 1100; //星星数量,默认1300
var canvas2 = document.createElement('canvas'),
ctx2 = canvas2.getContext('2d');
canvas2.width = 100;
canvas2.height = 100;
var half = canvas2.width / 2,
gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
gradient2.addColorStop(0.025, '#CCC');
gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
gradient2.addColorStop(1, 'transparent');
ctx2.fillStyle = gradient2;
ctx2.beginPath();
ctx2.arc(half, half, half, 0, Math.PI * 2);
ctx2.fill();
// End cache
function random(min, max) {
if (arguments.length < 2) {
max = min;
min = 0;
}
if (min > max) {
var hold = max;
max = min;
min = hold;
}
return Math.floor(Math.random() * (max - min + 1)) + min;
}
function maxOrbit(x, y) {
var max = Math.max(x, y),
diameter = Math.round(Math.sqrt(max * max + max * max));
return diameter / 2;
//星星移动范围，值越大范围越小，
}
var Star = function() {
this.orbitRadius = random(maxOrbit(w, h));
this.radius = random(60, this.orbitRadius) / 10; //星星大小,值越大星星越小,默认8
this.orbitX = w / 2;
this.orbitY = h / 2;
this.timePassed = random(0, maxStars);
this.speed = random(this.orbitRadius) / 8000; //星星移动速度,值越大越慢,默认5K
this.alpha = random(2, 10) / 10;
count++;
stars[count] = this;
}
Star.prototype.draw = function() {
var x = Math.sin(this.timePassed) * this.orbitRadius + this.orbitX,
y = Math.cos(this.timePassed) * this.orbitRadius + this.orbitY,
twinkle = random(10);
if (twinkle === 1 && this.alpha > 0) {
this.alpha -= 0.05;
} else if (twinkle === 2 && this.alpha < 1) {
this.alpha += 0.05;
}
ctx.globalAlpha = this.alpha;
ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
this.timePassed += this.speed;
}
for (var i = 0; i < maxStars; i++) {
new Star();
}
function animation() {
ctx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = 0.5; //尾巴
ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 2)';
ctx.fillRect(0, 0, w, h)
ctx.globalCompositeOperation = 'lighter';
for (var i = 1,
l = stars.length; i < l; i++) {
stars[i].draw();
};
window.requestAnimationFrame(animation);
}
animation();
</script>
</html>
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