基于js实现的绚烂图片墙动画特效源码.zip资源-CSDN文库

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该资源是一个基于JavaScript实现的图片墙动画特效源码，主要用于前端网页开发，为网站增添动态视觉效果。在前端开发中，动态图片展示是常见的需求，它可以吸引用户注意力，提升用户体验。下面将详细介绍这个源码中可能包含的关键知识点。 1. JavaScript基础：此项目的核心是JavaScript，一种广泛用于网页和应用程序的脚本语言。它负责处理页面上的动态行为，如图片的加载、动画效果的执行等。开发者需要熟悉JavaScript的基本语法，包括变量、数据类型、函数、条件语句、循环等。 2. DOM操作：在JavaScript中，Document Object Model (DOM) 是HTML和XML文档的结构表示。源码可能会涉及到获取元素、添加或删除元素、改变元素属性等DOM操作，以便于控制图片墙的布局和动画效果。 3. 图片加载与事件监听：为了实现图片墙，源码可能会监听图片的加载事件，确保图片完全加载后再进行显示，避免出现空白或者加载不全的情况。同时，可能还会监听用户的交互事件，如鼠标点击、滚动等，触发相应的动画效果。 4. CSS3和动画：虽然主要使用JavaScript实现动画效果，但CSS3也扮演着重要角色，可以用于设置图片样式、布局以及创建过渡和关键帧动画。通过结合CSS3和JavaScript，可以实现更流畅、性能更优的动画。 5. 图片墙布局：源码可能采用不同的布局方式，如网格布局、瀑布流布局、棋盘布局等，以适应不同尺寸的屏幕和设备。这涉及到响应式设计和媒体查询，以确保在不同设备上都能良好显示。 6. 动画库或框架：为了简化动画实现，开发者可能使用了现有的JavaScript动画库，如GreenSock (GSAP) 或 jQuery，这些库提供了强大的动画功能和性能优化。 7. 性能优化：在处理大量图片的动画时，性能优化至关重要。源码可能采用了延迟加载、图片预加载、使用Web Worker等技术来提高用户体验。 8. 用户交互：源码可能包含了与用户的互动元素，比如悬停效果、点击放大、滑动翻页等，这些都需要JavaScript来实现。 9. 浏览器兼容性：考虑到不同浏览器对某些特性支持程度的差异，源码可能包含了针对旧版浏览器的兼容性处理，以确保在尽可能多的平台上正常运行。通过研究这个源码，开发者不仅可以学习到如何使用JavaScript实现动态图片墙，还能深入理解前端开发中的动画原理、性能优化和跨浏览器兼容性等问题。对于提升前端技能和实际项目经验具有很大的帮助。

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基于js实现的绚烂图片墙动画特效源码.zip （1个子文件）

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index.html 9KB

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>js绚烂图片墙动画特效</title> <style type="text/css"> html {overflow: hidden;} body {position: absolute;margin: 0px;padding: 0px;background: #111;width: 100%; height: 100%;} #screen {position: absolute;left: 10%;top: 10%; width: 80%; height: 80%;background: #000;} #screen img {position: absolute;cursor: pointer;visibility: hidden; width: 0px;height: 0px;} #screen .tvover {border: solid #876;opacity: 1; filter: alpha(opacity=100); } #screen .tvout {border: solid #fff; opacity: 0.7;} #bankImages {display: none;} </style> <script> var Library = {}; Library.ease = function () { this.target = 0; this.position = 0; this.move = function (target, speed) { this.position += (target - this.position) * speed; } } var tv = { /* ==== variables ==== */ O : [], screen : {}, grid : { size : 4, // 4x4 grid borderSize : 6, // borders size zoomed : false }, angle : { x : new Library.ease(), y : new Library.ease() }, camera : { x : new Library.ease(), y : new Library.ease(), zoom : new Library.ease(), focalLength : 750 // camera Focal Length }, /* ==== init script ==== */ init : function () { this.screen.obj = document.getElementById('screen'); var img = document.getElementById('bankImages').getElementsByTagName('img'); this.screen.obj.onselectstart = function () { return false; } this.screen.obj.ondrag = function () { return false; } /* ==== create images grid ==== */ var ni = 0; var n = (tv.grid.size / 2) - .5; for (var y = -n; y <= n; y++) { for (var x = -n; x <= n; x++) { /* ==== create HTML image element ==== */ var o = document.createElement('img'); var i = img[(ni++) % img.length]; o.className = 'tvout'; o.src = i.src; tv.screen.obj.appendChild(o); /* ==== 3D coordinates ==== */ o.point3D = { x : x, y : y, z : new Library.ease() }; /* ==== push object ==== */ o.point2D = {}; o.ratioImage = 1; tv.O.push(o); /* ==== on mouse over event ==== */ o.onmouseover = function () { if (!tv.grid.zoomed) { if (tv.o) { /* ==== mouse out ==== */ tv.o.point3D.z.target = 0; tv.o.className = 'tvout'; } /* ==== mouse over ==== */ this.className = 'tvover'; this.point3D.z.target = -.5; tv.o = this; } } /* ==== on click event ==== */ o.onclick = function () { if (!tv.grid.zoomed) { /* ==== zoom in ==== */ tv.camera.x.target = this.point3D.x; tv.camera.y.target = this.point3D.y; tv.camera.zoom.target = tv.screen.w * 1.25; tv.grid.zoomed = this; } else { if (this == tv.grid.zoomed){ /* ==== zoom out ==== */ tv.camera.x.target = 0; tv.camera.y.target = 0; tv.camera.zoom.target = tv.screen.w / (tv.grid.size + .1); tv.grid.zoomed = false; } } } /* ==== 3D transform function ==== */ o.calc = function () { /* ==== ease mouseover ==== */ this.point3D.z.move(this.point3D.z.target, .5); /* ==== assign 3D coords ==== */ var x = (this.point3D.x - tv.camera.x.position) * tv.camera.zoom.position; var y = (this.point3D.y - tv.camera.y.position) * tv.camera.zoom.position; var z = this.point3D.z.position * tv.camera.zoom.position; /* ==== perform rotations ==== */ var xy = tv.angle.cx * y - tv.angle.sx * z; var xz = tv.angle.sx * y + tv.angle.cx * z; var yz = tv.angle.cy * xz - tv.angle.sy * x; var yx = tv.angle.sy * xz + tv.angle.cy * x; /* ==== 2D transformation ==== */ this.point2D.scale = tv.camera.focalLength / (tv.camera.focalLength + yz); this.point2D.x = yx * this.point2D.scale; this.point2D.y = xy * this.point2D.scale; this.point2D.w = Math.round( Math.max( 0, this.point2D.scale * tv.camera.zoom.position * .8 ) ); /* ==== image size ratio ==== */ if (this.ratioImage > 1) this.point2D.h = Math.round(this.point2D.w / this.ratioImage); else { this.point2D.h = this.point2D.w; this.point2D.w = Math.round(this.point2D.h * this.ratioImage); } } /* ==== rendering ==== */ o.draw = function () { if (this.complete) { /* ==== paranoid image load ==== */ if (!this.loaded) { if (!this.img) { /* ==== create internal image ==== */ this.img = new Image(); this.img.src = this.src; } if (this.img.complete) { /* ==== get width / height ratio ==== */ this.style.visibility = 'visible'; this.ratioImage = this.img.width / this.img.height; this.loaded = true; this.img = false; } } /* ==== HTML rendering ==== */ this.style.left = Math.round( this.point2D.x * this.point2D.scale + tv.screen.w - this.point2D.w * .5 ) + 'px'; this.style.top = Math.round( this.point2D.y * this.point2D.scale + tv.screen.h - this.point2D.h * .5 ) + 'px'; this.style.width = this.point2D.w + 'px'; this.style.height = this.point2D.h + 'px'; this.style.borderWidth = Math.round( Math.max( this.point2D.w, this.point2D.h ) * tv.grid.borderSize * .01 ) + 'px'; this.style.zIndex = Math.floor(this.point2D.scale * 100); } } } } /* ==== start script ==== */ tv.resize(); mouse.y = tv.screen.y + tv.screen.h; mouse.x = tv.screen.x + tv.screen.w; tv.run(); }, /* ==== resize window ==== */ resize : function () { var o = tv.screen.obj; tv.screen.w = o.offsetWidth / 2; tv.screen.h = o.offsetHeight / 2; tv.camera.zoom.target = tv.screen.w / (tv.grid.size + .1); for (tv.screen.x = 0, tv.screen.y = 0; o != null; o = o.offsetParent) { tv.screen.x += o.offsetLeft; tv.screen.y += o.offsetTop; } }, /* ==== main loop ==== */ run : function () { /* ==== motion ease ==== */ tv.angle.x.move(-(mouse.y - tv.screen.h - tv.screen.y) * .0025, .1); tv.angle.y.move( (mouse.x - tv.screen.w - tv.screen.x) * .0025, .1); tv.camera.x.move(tv.camera.x.target, tv.grid.zoomed ? .25 : .025); tv.camera.y.move(tv.camera.y.target, tv.grid.zoomed ? .25 : .025); tv.camera.zoom.move(tv.camera.zoom.target, .05); /* ==== angles sin and cos ==== */ tv.angle.cx = Math.cos(tv.angle.x.position); tv.angle.sx = Math.sin(tv.angle.x.position); tv.angle.cy = Math.cos(tv.angle.y.position); tv.angle.sy = Math.sin(tv.angle.y.position); /* ==== loop through all images ==== */ for (var i = 0, o; o = tv.O[i]; i++) { o.calc(); o.draw(); } /* ==== loop ==== */ setTimeout(tv.run, 32); } } /* ==== global mouse position ==== */ var mouse = { x : 0, y : 0 } document.onmousemove = function(e) { if (window.event) e = window.event; mouse.x = e.clientX; mouse.y = e.clientY; return false; } </script> </head> <body>  <div id="screen"></div> <div id="bankImages"> <img alt="脚本之家" src="http://demo.lanrenzhijia.com/2014/album1121/images/1.jpg"> <img alt="脚本之家" src="http://demo.lanrenzhijia.com/2014/album1121/images/2.jpg">

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