js模拟蛇爬行运动效果-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：js模拟蛇爬行运动效果

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>
        html,
        body {
            height: 100%;
        }

        body {
            background-color: #37444F;
            font-family: 'Oxygen', sans-serif;
            line-height: 2rem;
        }

        a {
            color: #F65A5B;
            text-decoration: none;
        }

        a:hover {
            text-decoration: underline;
        }

        canvas {
            display: block;
        }

        body {
            word-wrap: break-word;
        }

        .modal {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 80vw;
            max-width: 100%;
            height: 30vh;
            max-height: 100%;
            background-color: rgba(255,255,255,1);
            border-radius: 10px;
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            z-index: 1010;
            font-size: calc(1rem + 1vw);
            padding: 3rem 4rem;
        }

        .modal-overlay {
            z-index: 1000;
            background-color: rgba(0, 0, 0, 0.5);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;

        }

        .modal button {
            background-color: #34B3A0;
            border: none;
            display: block;
            width: 100%;
            margin-top: 2rem;
            padding: 1.5rem 2.5rem;
            color: white;
            font-size: calc(0.9rem + 1vw);
            font-weight: 300;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.05rem;
            animation-name: lantern;
            animation-duration: 3s;
            animation-timing-function: ease-in-out;
            animation-iteration-count: infinite;
            animation-play-state: running;
        }

        .text {
            font: 16px/300px 'Lato', sans-serif;
            width: 300px;
            height: 300px;
            position: absolute;
            margin: auto;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            text-align: center;
            user-select: none;
        }

        .click-explosion {
            width: 50px;
            height: 50px;

            animation: click-explode 1s ease-out forwards;
            position: absolute;
            z-index: 400;
        }

        .click-explosion-right {
            width: 50px;
            height: 50px;
            border-radius: 50px;
            background: #f00;
            animation: click-explode 1s ease-out forwards;
            position: absolute;
            z-index: 400;
        }

@keyframes click-explode {
            100% {
                transform: scale(1.5);
                opacity: 0;
            }
        }

@keyframes lantern {
            from {
                background-color: #34B3A0;
            }
            50% {
                background-color: HSL(171, 55%, 30%);
            }
            to {
                background-color: #34B3A0;
            }
        }
    </style>

</head>
<body translate="no">

    <canvas id="c"></canvas>


    <div class="modal-overlay" id="modal-overlay"></div>
    <script>
        $(document).ready(function() {
            $('.modal button').click(function() {
                $('div.modal').remove();
                $('div.modal-overlay').remove();
            });
        });
    </script>

    <script>
        const a = document.getElementById('c');
        var c = a.getContext('2d');

        const chains = [];
        const chainCount = 30;
        const entityCount = 20;
        let w = a.width;
        let h = a.height;
        let cx = w / 2;
        let cy = h / 2;
        let mx = cx;
        let my = cy;
        let md = 0;
        const maxa = 2;
        const maxv = 1;
        const avoidTick = 20;
        const avoidThresh = 50;

        function rand(min, max) {
            return Math.random() * (max - min) + min;
        }

        function Impulse() {
            this.x = cx;
            this.y = cy;
            this.ax = 0;
            this.ay = 0;
            this.vx = 0;
            this.vy = 0;
            this.r = 1;
        }

        Impulse.prototype.step = function step() {
            this.x += this.vx;
            this.y += this.vy;
            if (this.x + this.r >= w || this.x <= this.r) {
                this.vx = 0;
                this.ax = 0;
            }
            if (this.y + this.r >= h || this.y <= this.r) {
                this.vy = 0;
                this.ay = 0;
            }
            if (this.x + this.r >= w) {
                this.x = w - this.r;
            }
            if (this.x <= this.r) {
                this.x = this.r;
            }
            if (this.y + this.r >= h) {
                this.y = h - this.r;
            }
            if (this.y <= this.r) {
                this.y = this.r;
            }

            if (md) {
                this.vx += (this.x - mx) * 0.03;
                this.vy += (this.y - my) * 0.03;
            }

            this.ax += rand(-0.4, 0.4);
            this.ay += rand(-0.4, 0.4);
            this.vx += this.ax;
            this.vy += this.ay;
            this.ax *= Math.abs(this.ax) > maxa ?
            0.75:
            1;
            this.ay *= Math.abs(this.ay) > maxa ?
            0.75:
   .........完整代码请登录后点击上方下载按钮下载查看