js实现canvas鼠标撩动垂柳自然摆动动画效果代码-html代码-BFW代码库

js实现canvas鼠标撩动垂柳自然摆动动画效果代码

代码语言：html

所属分类：动画

代码描述：js实现canvas鼠标撩动垂柳自然摆动动画效果代码

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

<html>
<head>
    <style>
        html,
        body {
            margin: 0;
            padding: 0;
            height: 100%;
        }
        body {
            user-select: none;
            background-color: #000;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        canvas {
            flex-shrink: 0;
            background-color: #222;
            image-rendering: -moz-crisp-edges;
            image-rendering: -webkit-crisp-edges;
            image-rendering: pixelated;
            object-fit: contain;
        }

        #message {
            color: white;
            font-family: sans-serif;
            position: absolute;
            left: 50%;
            top: 40%;
            transform: translate(-50%,-50%);
            text-align: center;
        }
        h1,h4 {
            margin: 0;
        }
        h1 {
            font-size: 10vmin;
        }

        h4 {
            font-size: 4vmin;
        }
    </style>
  
</head>
<body>
    <div></div>
    <script>
        function lerpColor(a, b, amount) {
            var ah = parseInt(a.replace(/#/g, ""), 16),
            ar = ah >> 16,
            ag = (ah >> 8) & 0xff,
            ab = ah & 0xff,
            bh = parseInt(b.replace(/#/g, ""), 16),
            br = bh >> 16,
            bg = (bh >> 8) & 0xff,
            bb = bh & 0xff,
            rr = ar + amount * (br - ar),
            rg = ag + amount * (bg - ag),
            rb = ab + amount * (bb - ab);

            return (
                "#" + (((1 << 24) + (rr << 16) + (rg << 8) + rb) | 0).toString(16).slice(1)
            );
        }

        const PI = Math.PI,
        TWO_PI = Math.PI * 2;

        const Util = {};
        Util.timeStamp = function() {
            return window.performance.now();
        };
        Util.random = function(min, max) {
            return min + Math.random() * (max - min);
        };
        Util.map = function(a, b, c, d, e) {
            return (a - b) / (c - b) * (e - d) + d;
        };
        Util.lerp = function(value1, value2, amount) {
            return value1 + (value2 - value1) * amount;
        };
        Util.clamp = function(value, min, max) {
            return Math.max(min, Math.min(max, value));
        };

        const Tween = {};
        Tween.linear = function(currentTime, start, degreeOfChange, duration) {
            return degreeOfChange * currentTime / duration + start;
        };
        Tween.easeInOutQuad = function(t, b, c, d) {
            t /= d / 2;
            if (t < 1) return c / 2 * t * t + b;
            t--;
            return -c / 2 * (t * (t - 2) - 1).........完整代码请登录后点击上方下载按钮下载查看