<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
#wrap{
position: relative;
}
#container{
position: absolute;
/* top: 50%; */
/* right: 50%; */
}
</style>
<body>
<div id="wrap"
style="width: 100%; height: 97vh">
<div id="container">
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
<img src="https://lmg.jj20.com/up/allimg/4k/s/02/210924233115O14-0-lp.jpg" />
</div>
</div>
<p>手动模式：<input id="select" onclick="rp.setPattern('hand');" type="radio" name="sel" value="手动模式" /> 自动模式：<input
id="select" onclick="rp.setPattern('auto');" type="radio" name="sel" value="自动模式" /></p>
<p><input id="pre" type="button" value="上一张" /> <input id="next" type="button" value="下一张" /></p>
<p>
<script type="text/javascript">
var rotatePhos = (function () {
var util = {
$: function (sId) { return document.getElementById(sId); },
$$: function (tagName, parent) { parent = parent || document; return parent.getElementsByTagName(tagName); },
addEventHandler: function (elem, type, handler) {
if (elem.addEventListener) {
elem.addEventListener(type, handler, false);
}
else {
elem.attachEvent("on" + type, handler);
}
},
removeEventHandler: function (elem, type, handler) {
if (elem.removeEventListener) {
elem.removeEventListener(type, handler, false);
}
else {
elem.detachEvent("on" + type, handler);
}
},
getComputedStyle: function (elem) {
if (elem.currentStyle)
return elem.currentStyle;
else {
return document.defaultView.getComputedStyle(elem, null);
}
},
emptyFunction: function () { },
getElementsByClassName: function (className, parentElement) {
var elems = (parentElement || document.body).getElementsByTagName("*");
var result = [];
for (i = 0; j = elems[i]; i++) {
if ((" " + j.className + " ").indexOf(" " + className + " ") != -1) {
result.push(j);
}
}
return result;
},
extend: function (destination, source) {
for (var name in source) {
destination[name] = source[name];
}
return destination;
}
};
var rp = function (id, options) {
this.init(id, options); //初始化
}
rp.prototype = (function () {
var rotate;
var imgWidth;
var imgHeight;
var scaleMargin;
var con;
var handler;
var Tween = {//缓动类 默认提供三种缓动模式：linear easein easeout
linear: function (t, b, c, d, dir) { return c * t / d * dir + b; },
easeIn: function (t, b, c, d, dir) {
return c * (t /= d) * t * dir + b;
},
easeOut: function (t, b, c, d, dir) {
return -c * (t /= d) * (t - 2) * dir + b;
}
};
/* 改变椭圆旋转轨迹的横半轴长，竖半轴长*/
var changeRotateWH = function (width, height) {
var halfScale = (this.maxScale - this.minScale) / 2; //旋转到中间位置时的图片的缩放大小
rotate = {};
rotate.originX = width / 2; //旋转原点X轴坐标
rotate.originY = height / 2; //旋转原点Y轴坐标
rotate.halfRotateWidth = (width - this.imgWidth) / 2; //旋转横半轴长
rotate.halfRotateHeight = (height - this.imgHeight) / 2; //旋转竖半轴长
}
/* 设置图片旋转角和初始位置，大小 */
var initImgRC = function (imgs) {
var len = imgs.length;
con = (2 * Math.PI) / len;
for (var i = 0; i < len; i++) {
imgs[i].RC = i * con;
imgs[i].style.width = imgWidth + 'px';
imgs[i].style.height = imgHeight + 'px';
setImgPositionAndSize(imgs[i], 0);
}
}
/* 设置图片大小 */
var setImgSize = function (img) {
var left = rotate.originX + rotate.halfRotateWidth * Math.cos(img.RC) - imgWidth / 2;
var top = rotate.originY - rotate.halfRotateHeight * Math.sin(img.RC) - imgHeight / 2;
var scale = 0.5 + scaleMargin * (rotate.halfRotateHeight - rotate.halfRotateHeight * Math.sin(img.RC)) / (2 * rotate.halfRotateHeight); //图片在该时刻的缩放比
img.style.cssText = 'position:absolute;left:' + left + 'px;'
+ 'top:' + top + 'px;'
+ 'width:' + imgWidth * scale + 'px;'
+ 'height:' + imgHeight * scale + 'px;'
+ 'cursor:pointer;'
+ 'z-index:' + Math.round(scale * 100);
}
/* 设置图片位置和大小的匀速变化 */
var setImgPositionAndSize = function (img, path, direction) {
direction = direction || 'CW';
var dir = direction == 'CW' ? -1 : 1;
img.RC += (path * dir);
modifyImgAngle(img);
setImgSize(img);
}
/* 修改图片旋转角度（保证在0-2pai之间） */
var modifyImgAngle = function (img) {
(img.RC > (2 * Math.PI)) && (img.RC -= 2 * Math.PI);
(img.RC < 0) && (img.RC += 2 * Math.PI);
}
/* 设置图片的新位置 */
var setPos = function (img, path) {
img.RC = path;
modifyImgAngle(img);
var left = rotate.originX + rotate.halfRotateWidth * Math.cos(img.RC) - imgWidth / 2;
var top = rotate.originY - rotate.halfRotateHeight * Math.sin(img.RC) - imgHeight / 2;
var scale = 0.5 + scaleMargin * (rotate.halfRotateHeight - rotate.halfRotateHeight * Math.sin(img.RC)) / (2 * rotate.halfRotateHeight); //图片在该时刻的缩放比
img.style.cssText = 'position:absolute;left:' + left + 'px;'
+ 'top:' + top + 'px;'
+ 'width:' + imgWidth * scale + 'px;'
+ 'height:' + imgHeight * scale + 'px;'
+ 'z-index:' + Math.round(scale * 100);
}
/* 旋转指定角度 */
var rotateAngle = function (imgs, angle, dir, tween, onSelected) {
console.log(99999)
var duration = 1000;
var startTime = (new Date()).getTime();
dir == 'CW' ? dir = -1 : dir = 1;
for (var i = 0, len = imgs.length; i < len; i++) {
imgs[i].startAngle = imgs[i].RC;
}
timeId = window.setInterval(function () {
var now = (new Date()).getTime();
if ((now - startTime) >= duration) {
window.clearInterval(timeId);
timeId = undefined;
onSelected = onSelected || util.emptyFunction;
onSelected(); //触发回调函数;
}
for (var i = 0, len = imgs.length; i < len; i++) {
var path = tween(now - startTime, imgs[i].startAngle, angle, duration, dir); //通过缓动公式计算新角度（RC）
setPos(imgs[i], path, dir);
}
}, 20);
}
/* 图片选择事件处理程序 */
var imgSelectedHandler = function (imgs, path, tween, onSelected) {
return function (eve) {
eve = eve || window.event;
var dir;
var angle;
var target = eve.target || eve.srcElement;
var RC = target.RC;
if (RC >= Math.PI / 2 && RC <= Math.PI * 3 / 2) {
dir = 'ACW';
angle = 3 * Math.PI / 2 - RC;
}
else {
dir = 'CW';
Math.sin(RC) >= 0 ? angle = Math.PI / 2 + RC : angle = RC - 3 * Math.PI / 2;
}
(typeof timeId != 'undefined') && window.clearInterval(timeId);
rotateAngle(imgs, angle, dir, tween, onSelected);
}
}
/* 为图片绑定点击事件处理程序 */
var bindHandlerForImgs = function (imgs, path, onSelected) {
for (var i = 0, len = imgs.length; i < len; i++) {
imgs[i].handler = imgSelectedHandler(imgs, path, onSelected);
util.addEventHandler(imgs[i], 'click', imgs[i].handler);
}
}
/* 为图片绑定鼠标移入移出事件处理程序 */
// var mouseenterHandlerForImgs = function (imgs, path, onSelected) {
// for (var i = 0, len = imgs.length; i < len; i++) {
// imgs[i].handler = imgSelectedHandler(imgs, path, onSelected);
// util.addEventHandler(imgs[i], 'mouseenter', imgs[i].handler);
// }
// }
/* 删除图片上的点击事件处理程序 */
var removeImgsHandler = function (imgs) {
for (var i = 0, len = imgs.length; i < len; i++) {
if (imgs[i].handler) {
util.removeEventHandler(imgs[i], 'click', imgs[i].handler);
}
}
}
return {
/* 初始化 */
init: function (id, options) {
var defaultOptions = {
width: 700, //容器宽
height: 300, //容器高
imgWidth: 130, //图片宽
imgHeight: 80, //图片高
maxScale: 1.5, //最大缩放倍数
minScale: 0.5, //最小缩放倍数
rotateSpeed: 10 //运转速度
}
options = util.extend(defaultOptions, options); //参数设置
this.container = util.$(id);
this.width = options.width;
this.height = options.height;
imgWidth = this.imgWidth = options.imgWidth;
imgHeight = this.imgHeight = options.imgHeight;
this.maxScale = options.maxScale;
this.minScale = options.minScale;
scaleMargin = this.maxScale - this.minScale;
this.rotateSpeed = options.rotateSpeed;
this.imgs = util.$$('img', this.container);
this.setContainerSize(this.width, this.height);
initImgRC(this.imgs);
},
/* 设置容器尺寸 */
setContainerSize: function (width, height) {
width = width || this.width;
height = height || this.height;
this.container.style.position = 'relative';
this.container.style.width = width + 'px';
this.container.style.height = height + 'px';
changeRotateWH.call(this, width, height); //改变容器尺寸后改变旋转轨迹
},
/* 选择上一幅图片 */
prePho: function (onSelected) {
if (this.pattern == 'hand') {
onSelected = onSelected || util.emptyFunction;
var tween = tween || Tween['easeOut'];
if (typeof timeId != 'undefined') {
return;
} else {
rotateAngle(this.imgs, con, 'ACW', tween, onSelected);
}
}
},
/* 选择下一幅图片 */
nextPho: function (onSelected) {
if (this.pattern == 'hand') {
onSelected = onSelected || util.emptyFunction;
var tween = tween || Tween['easeOut'];
if (typeof timeId != 'undefined') {
return;
} else {
rotateAngle(this.imgs, con, 'CW', tween, onSelected);
}
}
},
/* 添加缓动模式 */
addTweenFunction: function (name, func) {
if (typeof func == 'Function' || typeof func == 'Object') {
Tween[name] = func;
}
},
/* 设置旋转模式（自动/手动）*/
setPattern: function (patternName, option) {
option = option || {};
this.pattern = patternName;
var rotateSpeed = option.rotateSpeed || 10;
this.path = Math.PI / 1000 * rotateSpeed;
(typeof timeId != 'undefined') && window.clearInterval(timeId);
if (patternName === 'auto') {//自动模式 可传入旋转方向：option.rotateDir 旋转速度：option.rotateSpeed
var self = this;
var direction = option.rotateDir || 'CW'; //顺时针：CW 逆时针：ACW
removeImgsHandler(this.imgs);
timeId = window.setInterval(function () {
for (var i = 0, len = self.imgs.length; i < len; i++) {
setImgPositionAndSize(self.imgs[i], self.path, direction);
}
}, 20);
}
else if (patternName === 'hand') {//手动模式，可传回调函数：option.onSelected 缓动模式：option.tween
var onSelected = option.onSelected || util.emptyFunction;
var tween = Tween[tween] || Tween['easeOut']; //缓动模式默认为easeout
removeImgsHandler(this.imgs);
(typeof timeId != 'undefined') && window.clearInterval(timeId);
timeId = undefined;
bindHandlerForImgs(this.imgs, this.path, tween, onSelected);
}
},
//鼠标移入事件
}
})();
return rp;
})();
var rp = new rotatePhos('container');
// rp.setPattern('auto', { rotateSpeed: 1 });
rp.setPattern('hand');
document.getElementById('pre').onclick = function () { rp.prePho(); };
document.getElementById('next').onclick = function () { rp.nextPho(); };
// ]]></script>
</body>
js多张图片绕中心点旋转（远小近大）
©著作权归作者所有,转载或内容合作请联系作者
- 文/潘晓璐 我一进店门，熙熙楼的掌柜王于贵愁眉苦脸地迎上来，“玉大人，你说我怎么就摊上这事。” “怎么了？”我有些...
- 文/花漫 我一把揭开白布。 她就那样静静地躺着，像睡着了一般。 火红的嫁衣衬着肌肤如雪。 梳的纹丝不乱的头发上，一...
- 文/苍兰香墨 我猛地睁开眼，长吁一口气：“原来是场噩梦啊……” “哼！你这毒妇竟也来了？” 一声冷哼从身侧响起，我...
推荐阅读更多精彩内容
- 默认沿Z轴旋转 transform: rotate(45deg); 沿X轴旋转 transform: rotate...
- transform：变形 transition：过渡动画——需要触发 animation：一刷新就有动画 3d效果...
- transform：变形 transition：过渡动画——需要触发 animation：一刷新就有动画 3d效果...
- 元素旋转 初始值变形 透视距离800符合人眼的透视效果 transform:perspective(800px) ...
