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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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