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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{
               100%;
              height: 100%;
            }
            .bigbox{
               10px;
              height: 10px;
              margin: 200px 400px;
              position: relative;
              z-index: 1;
            }
            .box{
              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;
               200px;
              height: 200px;
              opacity: 0.8;
              transition: all .4s;
            }
            .bigpic{
               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;
               140px;
              height: 140px;
              top: 25px;
              left: 25px;
            }
            .box .smallpic{
               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 {
               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 {
               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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  • 原文地址:https://www.cnblogs.com/smileZAZ/p/13666905.html
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