绳子下拉菜单特效-html代码-BFW代码库

代码语言：html

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>
html{
	height: 100%;
}

body{
	font-family: Arial;
	margin: 0px;
	height: 100%;
	--color: #2196F3;
	--bgColor: #424242;
	color: var(--color);
	background-color: var(--bgColor);
}

*{
	-webkit-touch-callout: none; /* iOS Safari */
		  -webkit-user-select: none; /* Safari */
		   -khtml-user-select: none; /* Konqueror HTML */
			 -moz-user-select: none; /* Old versions of Firefox */
			  -ms-user-select: none; /* Internet Explorer/Edge */
				  user-select: none;
}

#nav{
	position: fixed;
	transform: translateY(-70vh);
	overflow: visible;
}

canvas{
	display: none;
}

#nav > #content{
	box-sizing: border-box;
	margin: 0px;
	padding: 20vh 10px 10vh 10px;
	height: 70vh;
	box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
	background-color: #616161;
}

#nav > #content > h1{
	color: #eee;
	margin: 0px;
	text-align: center;
}

#nav > #content > div{
	margin: 30px auto;
	display: flex;
	justify-content: center;
	align-items: center;
}

#nav > #content a{
	margin: 10px;
	font-size: 20px;
}

#nav > #rope{
	width: 100vw;
	height: 100vh;
	display: block;
}

#nav > #rope > circle{
	fill: var(--bgColor);
	stroke: var(--color);
	cursor: pointer;
	-webkit-tap-highlight-color: transparent;
}

#nav > #rope > path{
	stroke: var(--color);
}

#page{
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	color: var(--textColor);
}

#page > h1{
	font-size: 50px;
}
</style>

</head>
<body translate="no">
<div id="nav">
<div id="content">
<h1>Full-Page Navigation</h1>
<div>
<a data-color="#2196F3" style="color: #2196F3" href="">Blue Page</a>
<a data-color="#F44336" style="color: #F44336" href="">Red Page</a>
<a data-color="#8BC34A" style="color: #8BC34A" href="">Green Page</a>
<a data-color="#FF9800" style="color: #FF9800" href="">Orange Page</a>
</div>
</div>
<svg id="rope" xmlns="http://www.w3.org/2000/svg">
<path fill="transparent" stroke-width="10px" stroke-linejoin="round" />
<circle stroke-width="10px" r="20" id="handle"></circle>
</svg>
</div>
<div id="page">
<h1>Pull</h1>
</div>

<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/matter.min.js"></script>
<script>
class PhysicsEngine {
  constructor() {
    this.navclosedPos = -30;
    this.navHeight = 50;
    this.canvasWidth = 500;
    this.canvasHeight = 600;
    this.initWorld();
  }

  initWorld() {
    const engine = Matter.Engine.create();
    const render = Matter.Render.create({
      element: document.body,
      engine: engine });


    let bodies = this.createBodies();
    let constraints = this.createConstraints();
    Matter.World.add(engine.world, [...bodies, ...constraints]);

    Matter.Engine.run(engine);
    Matter.Render.run(render);
  }

  createBodies() {
    this.nav = Matter.Bodies.rectangle(this.canvasWidth / 2, this.navclosedPos, this.canvasWidth, this.navHeight, { isSensor: true, inertia: Infinity, mass: 0.1 });
    this.rope = this.createRope();
    this.handle = this.rope.bodies[this.rope.bodies.length - 1];
    return [this.nav, this.rope];
  }

  createRope() {
    const ropeParts = Matter.Body.nextGroup(true);
    const rope = Matter.Composites.stack(this.canvasWidth / 2, this.navclosedPos, 8, 1, -30, 0, (x, y) => {
      return Matter.Bodies.circle(x, y, 15, {
        collisionFilter: { group: ropeParts } });

    });

    Matter.Composites.chain(rope, 0, 0.2, 0, -0.2, { stiffness: 1, damping: 0.6, length: 3 });
    return rope;
  }

  createConstraints() {
    this.fixMenuToTop = Matter.Constraint.create({
      bodyA: this.nav,
      pointA: { x: 0, y: this.navHeight / 2 },
      pointB: { x: this.canvasWidth / 2, y: this.navclosedPos },
      stiffness: 0.5,
      damping: 0.1,
      length: 0 });


    this.fixMenuToBottom = Matter.Constraint.create({
      bodyA: this.nav,
      pointA: { x: 0, y: this.navHeight / 2 },
      pointB: { x: this.canvasWidth / 2, y: 0 },
      stiffness: 0.01,
      damping: 0.1,
      length: 0 });


    const fixRopeToMenu = Matter.Constraint.create({
      bodyA: this.nav,
      pointA: { x: 0, y: this.navHeight - 20 },
      bodyB: this.rope.bodies[0],
      stiffness: 1,
      length: 0 });


    this.fixMouseToHandle = Matter.Constraint.create({
      bodyA: this.handle,
      pointB: { x: 0, y: 0 },
      stiffness: 0.000000000000001,
      length: 0 });


    return [this.fixMenuToTop, this.fixMenuToBottom, fixRopeToMenu, this.fixMouseToHandle];
  }

  grabHandle(x, y) {
    this.moveHandle(x, y);
    this.fixMouseToHandle.stiffness = 1;
  }
.........完整代码请登录后点击上方下载按钮下载查看

绳子下拉菜单特效

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