css实现海面波动海燕纷飞动画效果代码-html代码-BFW代码库

css实现海面波动海燕纷飞动画效果代码

代码语言：html

所属分类：动画

代码描述：css实现海面波动海燕纷飞动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<style>
    body {
  margin: 0;
  background-image: linear-gradient(#ffbe79, #ffbe79 10%, #75bed6 40%, #75bed6);
  overflow: hidden;
  height: 100vh;
}

.bird {
  width: 25px;
  height: 5px;
  display: inline-block;
  position: absolute;
  transform: skew(20deg, 20deg);
  animation: wave 2.5s ease-in-out infinite;
}

.bird:before,
.bird:after {
  content: '';
  width: 100%;
  height: 100%;
  background-color: #000;
  position: absolute;
  border-radius: 20%;
}

.bird:before {
  right: 49%;
  transform-origin: right;
  transform: rotate(-40deg);
  animation: flap-left .75s ease-in-out infinite;
}

.bird:after {
  left: 49%;
  transform-origin: left;
  transform: rotate(40deg);
  animation: flap-right .75s linear infinite;
}

@keyframes wave {
  40% {
    transform: translateY(40px) skew(20deg, 20deg);
  }
  50% {
    transform: translateY(50px) skew(20deg, 20deg);
  }
  60% {
    transform: translateY(40px) skew(20deg, 20deg);
  }
  100% {
    transform: translateY(0) skew(20deg, 20deg);
  }
}

@keyframes flap-left {
  60% {
    transform: rotate(10deg);
  }
  75% {
    transform: rotate(20deg);
  }
  100% {
    transform: rotate(-40deg);
  }
}

@keyframes flap-right {
  60% {
    transform: rotate(-10deg);
  }
  75% {
    transform: rotate(-20deg);
  }
  100% {
    transform: rotate(40deg);
  }
}
</style>
</head>
<body>

<script >
    
    // JS is for dynamically creating and moving the birds across the screen.
// The actual bird flapping and flight wave is CSS animation.

// Adjust these options here to customize the scene.
let options = {
  delay: 500,
  speedRange: [2, 5],
  angleRange: [-30, 30],
  sizeRange: [8, 30]
};

let bird = document.createElement('span');
bird.className = 'bird';
let particles = [];
setInterval(() => {
  let newBird = bird.cloneNode();
  const size = rand(options.sizeRange[0], options.sizeRange[1]);
  newBird.style.width = size + 'px';
  newBird.style.height = (size/5) + 'px';

  document.body.appendChild(newBird);
  
  particles.push(new Particle(newBird, {
    speed: rand(
      options.speedRange[0],
      options.speedRange[1]
    ),
    angle: rand(
      options.angleRange[0],
      options.angleRange[1]
    ),
    pos: [-100, rand(0, window.innerHeight)]
  }));
}, options.delay);


window.requestAnimationFrame(draw);
function draw () {
  particles.forEach((particle, i, arr) => {
    if (particle.pos[0] > window.innerWidth ||
        particle.pos[1] > window.innerHeight ||
        particle.pos[0] < 0-window.innerWidth ||
        particle.pos[1] < 0-window.innerHeight) {
      particle.element.parentNode.removeChild(particle.element);
      arr.splice(i, 1);
    }
    particle.move();
  });
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