<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>基础动画了解</title> </head> <body style="background-color: #000;position: relative;"> <div class="contain"> <div class="ball" id="ball"></div> <div class="pplayout" id="contain"></div> </div> <style type="text/css"> .point{width:1px;height: 1px;border-radius: 50%;overflow: hidden;background:#000;left: 0;top:0;position: absolute;} .contain{background-color: #eee;width: 500px;height: 300px;position: relative;display: block;margin:0 auto;margin-top: 10%;} .pplayout{width: 100%;height: 100%;position: relative;display: block;z-index: 5;} .ball{width:10px;height: 10px;border-radius: 50%;overflow: hidden;box-shadow: 0 0 3px red;background-image: linear-gradient(-90deg, red, yellow);left: -5px;top:295px;position: absolute;z-index: 10;} button{ margin: 5px 0 0 5px; } </style> <div style="margin: 0 auto;width: 500px;"> <button onclick="runAni('Linear')">Linear</button> <button onclick="runAni('Quad.easeIn')">Quad.easeIn</button> <button onclick="runAni('Quad.easeOut')">Quad.easeOut</button> <button onclick="runAni('Quad.easeInOut')">Quad.easeInOut</button> <button onclick="runAni('Cubic.easeIn')">Cubic.easeIn</button> <button onclick="runAni('Cubic.easeOut')">Cubic.easeOut</button> <button onclick="runAni('Cubic.easeInOut')">Cubic.easeInOut</button> <button onclick="runAni('Quart.easeIn')">Quart.easeIn</button> <button onclick="runAni('Quart.easeOut')">Quart.easeOut</button> <button onclick="runAni('Quart.easeInOut')">Quart.easeInOut</button> <button onclick="runAni('Sine.easeIn')">Sine.easeIn</button> <button onclick="runAni('Sine.easeOut')">Sine.easeOut</button> <button onclick="runAni('Sine.easeInOut')">Sine.easeInOut</button> <button onclick="runAni('Expo.easeIn')">Expo.easeIn</button> <button onclick="runAni('Expo.easeOut')">Expo.easeOut</button> <button onclick="runAni('Expo.easeInOut')">Expo.easeInOut</button> <button onclick="runAni('Circ.easeIn')">Circ.easeIn</button> <button onclick="runAni('Circ.easeOut')">Circ.easeOut</button> <button onclick="runAni('Circ.easeInOut')">Circ.easeInOut</button> <button onclick="runAni('Elastic.easeIn')">Elastic.easeIn</button> <button onclick="runAni('Elastic.easeOut')">Elastic.easeOut</button> <button onclick="runAni('Elastic.easeInOut')">Elastic.easeInOut</button> <button onclick="runAni('Back.easeIn')">Back.easeIn</button> <button onclick="runAni('Back.easeOut')">Back.easeOut</button> <button onclick="runAni('Back.easeInOut')">Back.easeInOut</button> <button onclick="runAni('Bounce.easeIn')">Bounce.easeIn</button> <button onclick="runAni('Bounce.easeOut')">Bounce.easeOut</button> <button onclick="runAni('Bounce.easeInOut')">Bounce.easeInOut</button> </div> <script type="text/javascript"> /* * Tween.js * t: current time（当前时间）； * b: beginning value（初始值）； * c: change in value（变化量）； * d: duration（持续时间）。 */ var Tween = { Linear: function(t, b, c, d) { //匀速 return c * t / d + b; }, Quad: { //二次方缓动效果 easeIn: function(t, b, c, d) { return c * (t /= d) * t + b; }, easeOut: function(t, b, c, d) { return -c * (t /= d) * (t - 2) + b; }, easeInOut: function(t, b, c, d) { if ((t /= d / 2) < 1) return c / 2 * t * t + b; return -c / 2 * ((--t) * (t - 2) - 1) + b; } }, Cubic: { //三次方缓动效果 easeIn: function(t, b, c, d) { return c * (t /= d) * t * t + b; }, easeOut: function(t, b, c, d) { return c * ((t = t / d - 1) * t * t + 1) + b; }, easeInOut: function(t, b, c, d) { if ((t /= d / 2) < 1) return c / 2 * t * t * t + b; return c / 2 * ((t -= 2) * t * t + 2) + b; } }, Quart: { //四次方缓动效果 easeIn: function(t, b, c, d) { return c * (t /= d) * t * t * t + b; }, easeOut: function(t, b, c, d) { return -c * ((t = t / d - 1) * t * t * t - 1) + b; }, easeInOut: function(t, b, c, d) { if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b; return -c / 2 * ((t -= 2) * t * t * t - 2) + b; } }, Quint: { //五次方缓动效果 easeIn: function(t, b, c, d) { return c * (t /= d) * t * t * t * t + b; }, easeOut: function(t, b, c, d) { return c * ((t = t / d - 1) * t * t * t * t + 1) + b; }, easeInOut: function(t, b, c, d) { if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b; return c / 2 * ((t -= 2) * t * t * t * t + 2) + b; } }, Sine: { //正弦缓动效果 easeIn: function(t, b, c, d) { return -c * Math.cos(t / d * (Math.PI / 2)) + c + b; }, easeOut: function(t, b, c, d) { return c * Math.sin(t / d * (Math.PI / 2)) + b; }, easeInOut: function(t, b, c, d) { return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b; } }, Expo: { //指数缓动效果 easeIn: function(t, b, c, d) { return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b; }, easeOut: function(t, b, c, d) { return (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b; }, easeInOut: function(t, b, c, d) { if (t == 0) return b; if (t == d) return b + c; if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b; return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b; } }, Circ: { //圆形缓动函数 easeIn: function(t, b, c, d) { return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b; }, easeOut: function(t, b, c, d) { return c * Math.sqrt(1 - (t = t / d - 1) * t) + b; }, easeInOut: function(t, b, c, d) { if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b; return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b; } }, Elastic: { //指数衰减正弦曲线缓动函数 easeIn: function(t, b, c, d, a, p) { //加速 var s; if (t == 0) return b; if ((t /= d) == 1) return b + c; if (typeof p == "undefined") p = d * .3; if (!a || a < Math.abs(c)) { s = p / 4; a = c; } else { s = p / (2 * Math.PI) * Math.asin(c / a); } return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; }, easeOut: function(t, b, c, d, a, p) { //减速 var s; if (t == 0) return b; if ((t /= d) == 1) return b + c; if (typeof p == "undefined") p = d * .3; if (!a || a < Math.abs(c)) { a = c; s = p / 4; } else { s = p / (2 * Math.PI) * Math.asin(c / a); } return (a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b); }, easeInOut: function(t, b, c, d, a, p) { //先加速后减速 var s; if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (typeof p == "undefined") p = d * (.3 * 1.5); if (!a || a < Math.abs(c)) { a = c; s = p / 4; } else { s = p / (2 * Math.PI) * Math.asin(c / a); } if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b; } }, Back: { //超过范围的三次方的缓动函数 easeIn: function(t, b, c, d, s) { if (typeof s == "undefined") s = 1.70158; return c * (t /= d) * t * ((s + 1) * t - s) + b; }, easeOut: function(t, b, c, d, s) { if (typeof s == "undefined") s = 1.70158; return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b; }, easeInOut: function(t, b, c, d, s) { if (typeof s == "undefined") s = 1.70158; if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b; return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b; } }, Bounce: { //指数衰减的反弹曲线缓动函数 easeIn: function(t, b, c, d) { return c - Tween.Bounce.easeOut(d - t, 0, c, d) + b; }, easeOut: function(t, b, c, d) { if ((t /= d) < (1 / 2.75)) { return c * (7.5625 * t * t) + b; } else if (t < (2 / 2.75)) { return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b; } else if (t < (2.5 / 2.75)) { return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b; } else { return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b; } }, easeInOut: function(t, b, c, d) { if (t < d / 2) { return Tween.Bounce.easeIn(t * 2, 0, c, d) * .5 + b; } else { return Tween.Bounce.easeOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b; } } } } function runAni(str){ var dom = document.getElementById("ball"); var lay = document.getElementById("contain"); lay.innerHTML = "" // var event = function(){} // switch(str){ // case 'Linear': event = Tween.Linear;break // case 'Quad.easeIn': event = Tween.Quad.easeIn;break // case 'Quad.easeOut': event = Tween.Quad.easeOut;break // case 'Quad.easeInOut': event = Tween.Quad.easeInOut;break // case 'Cubic.easeIn': event = Tween.Cubic.easeIn;break // case 'Cubic.easeOut': event = Tween.Cubic.easeOut;break // case 'Cubic.easeInOut': event = Tween.Cubic.easeInOut;break // case 'Quart.easeIn': event = Tween.Quart.easeIn;break // case 'Quart.easeOut': event = Tween.Quart.easeOut;break // case 'Quart.easeInOut': event = Tween.Quart.easeInOut;break // case 'Quint.easeIn': event = Tween.Quint.easeIn;break // case 'Quint.easeOut': event = Tween.Quint.easeOut;break // case 'Quint.easeInOut': event = Tween.Quint.easeInOut;break // case 'Sine.easeIn': event = Tween.Sine.easeIn;break // case 'Sine.easeOut': event = Tween.Sine.easeOut;break // case 'Sine.easeInOut': event = Tween.Sine.easeInOut;break // case 'Expo.easeIn': event = Tween.Expo.easeIn;break // case 'Expo.easeOut': event = Tween.Expo.easeOut;break // case 'Expo.easeInOut': event = Tween.Expo.easeInOut;break // case 'Circ.easeIn': event = Tween.Circ.easeIn;break // case 'Circ.easeOut': event = Tween.Circ.easeOut;break // case 'Circ.easeInOut': event = Tween.Circ.easeInOut;break // case 'Elastic.easeIn': event = Tween.Elastic.easeIn;break // case 'Elastic.easeOut': event = Tween.Elastic.easeOut;break // case 'Elastic.easeInOut': event = Tween.Elastic.easeInOut;break // case 'Back.easeIn': event = Tween.Back.easeIn;break // case 'Back.easeOut': event = Tween.Back.easeOut;break // case 'Back.easeInOut': event = Tween.Back.easeInOut;break // case 'Bounce.easeIn': event = Tween.Bounce.easeIn;break // case 'Bounce.easeOut': event = Tween.Bounce.easeOut;break // case 'Bounce.easeInOut': event = Tween.Bounce.easeInOut;break // default: // } var start = 0,end = 500 var ti = setInterval(function(){ try{ let left = start; // let top = (300 - event(start,1,300,500)); let top = (300 - eval(`Tween.${str}(start,1,300,500)`)); dom.style.left = (start - 5) + 'px'; dom.style.top = (top - 5) + 'px'; start++ var child = document.createElement("div") child.className = "point" child.style.left = left + 'px'; child.style.top = top + 'px'; lay.appendChild(child) if(start >= end){ clearInterval(ti) } }catch(er){ console.dir(er) clearInterval(ti) } },16) } </script> </body> </html>
