p5多圆环折叠运行动画效果-html代码-BFW代码库

p5多圆环折叠运行动画效果

代码语言：html

所属分类：动画

代码描述：p5多圆环折叠运行动画效果

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;
  overflow: hidden;
  display: flex;
  height: 100vh;
  background: black;
}

canvas {
  margin: auto;
  touch-action: none;
}

input {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  width: 80%;
  height: 34px;
  max-width: 400px;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
}
input:active {
  cursor: grabbing;
}
input::-webkit-slider-runnable-track {
  box-sizing: border-box;
  height: 6px;
  background: #fff;
  -webkit-appearance: none;
  appearance: none;
}
input::-moz-range-track {
  box-sizing: border-box;
  height: 6px;
  background: #fff;
  -webkit-appearance: none;
  appearance: none;
}
input::-ms-track {
  box-sizing: border-box;
  height: 6px;
  background: #fff;
  -webkit-appearance: none;
  appearance: none;
}
input::-webkit-slider-thumb {
  margin-top: -12px;
  box-sizing: border-box;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid black;
  -webkit-appearance: none;
  appearance: none;
  cursor: grab;
}
input::-moz-range-thumb {
  box-sizing: border-box;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid black;
  -webkit-appearance: none;
  appearance: none;
  cursor: grab;
}
input::-ms-thumb {
  margin-top: 0px;
  box-sizing: border-box;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid black;
  -webkit-appearance: none;
  appearance: none;
  cursor: grab;
}

section {
  box-sizing: border-box;
  font-size: 30px;
  color: white;
  position: fixed;
  left: 0;
  top: 20px;
  width: 100%;
  text-align: center;
  padding: 10px 10%;
  z-index: 10;
  pointer-events: none;
  text-shadow: 0 0 3px black, 0 0 4px black, 0 0 5px black;
  background: rgba(0, 0, 0, 0.7);
  font-family: 'Montserrat', sans-serif;
}
section p {
  margin: 0;
}
@media (max-width: 500px) {
  section {
    font-size: 24px;
  }
}

code {
  white-space: nowrap;
}
</style>

</head>
<body translate="no">
<input type="range" min="1" max="7" step="1" id="step" value="1">
<section>
<p>Draw a circle</p>
<p>Pick 6 evenly spaced points along the circle</p>
<p>Draw circles from each point with the same radius</p>
<p>Animate the radius of the inner circle</p>
<p>Increase the amount of petals and hide the inner circle</p>
<p>Use a different color for each petal</p>
<p>Add even more petals and use a blend mode of type 'screen'</p>
</section>

<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/p5.js"></script>
<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/gsap.min.js"></script>
<script>
let canvas;
let anim = { petalRadius: 0.5 };
console.clear();

/* ====== STEP 1 ====== */
function goToStep1 () {
  blendMode(SCREEN);
  noLoop();
  strokeWeight(2);
}

function step1 () {
  clear();
  noFill();
  stroke(255);
  const r = min(width, height) * 0.4;
  circle(width/2, height/2, r);
}

/* ====== STEP 2 ====== */
function goToStep2 () {
  blendMode(SCREEN);
  noLoop();
  strokeWeight(2);
}

function step2 () {
  clear();
  noFill();
  stroke(255);
  const r = min(width, height) * 0.4;
  circle(width/2, height/2, r);
  const petals = 6;
  for (let i = 0; i < petals; i++) {
    const x = sin(i / petals * TWO_PI) * (r * 0.5) + width / 2;
    const y = cos(i / petals * TWO_PI) * (r * 0.5) + height / 2;
    fill(255);
    circle(x, y, 10);
  }
}

/* ====== STEP 3 ====== */
let step3Index = 0;
function goToStep3 () {
  blendMode(SCREEN);
  loop();.........完整代码请登录后点击上方下载按钮下载查看