纯 CSS3 卡通小火车行驶动画

自从CSS3流行以来，基于纯CSS3的动画就层出不穷，有纯CSS3的人物动画、纯CSS3按钮动画等。这次，我们给大家分享一个很不错的CSS3卡通火车沿轨道行驶动画，一辆卡通样式的火车缓缓驰过，特别是火车头的动画设计，非常可爱和逼真。

效果预览

代码实现

HTML代码

<div class=\"center\"><div class=\"mountains\"></div><div class=\"train\"><div class=\"engine-front\"><div class=\"chimney\"><div class=\"smoke\"></div><div class=\"smoke smoke-2\"></div><div class=\"smoke smoke-3\"></div><div class=\"smoke smoke-4\"></div></div></div><div class=\"engine-body\"></div><div class=\"compartment\"><div class=\"compartment-window\"></div></div><div class=\"compartment compartment-two\"><div class=\"compartment-window\"></div></div><div class=\"compartment compartment-three\"><div class=\"compartment-window\"></div></div><div class=\"wheel-holder\"><div class=\"wheel\"></div><div class=\"wheel wheel-2\"><div class=\"wheel-joint\"></div><div class=\"wheel-joint wheel-joint-2\"></div></div><div class=\"wheel wheel-3\"></div><div class=\"wheel wheel-4\"></div><div class=\"wheel wheel-5\"></div><div class=\"wheel wheel-6\"></div><div class=\"wheel wheel-7\"></div><div class=\"wheel wheel-8\"></div><div class=\"wheel wheel-9\"></div></div></div><div class=\"bridge\"></div></div>

HTML代码的结构非常清晰，总体来讲分两部分，一部分是作为背景的明月、高山以及星空，对应的CSS类为

mountains

；另一部分则是行驶的火车，对应的CSS类为

train

。

对于火车部分则相对比较复杂，有车头、引擎、轨道、车轮、车厢等元素，下面的CSS代码中会一一讲解。

CSS代码

背景部分绘制了两座高山，一轮明月以及清澈的星空。

.mountains {height: 100%;position: absolute;width: 100%;z-index: 1;}.mountains::before, .mountains::after {background: #000c18;background: -moz-linear-gradient(#012a53, #000c18 50%);background: -webkit-linear-gradient(#012a53, #000c18 50%);background: -o-linear-gradient(#012a53, #000c18 50%);background: -ms-linear-gradient(#012a53, #000c18 50%);background: linear-gradient(#012a53, #000c18 50%);content: \"\";height: 100%;position: absolute;}.mountains::before {border-radius: 100% 300% 0 0;left: -20%;width: 57%;}.mountains::after {border-radius: 300% 100% 0 0;right: -20%;width: 80%;}

然后就是火车轨道的桥梁部分，也十分简单。

.bridge {border-bottom: 0.3rem solid white;border-top: 0.3rem solid white;background: black;background: -webkit-linear-gradient(55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem, -webkit-linear-gradient(-55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem;background: -moz-linear-gradient(55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem, -moz-linear-gradient(-55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem;background: -o-linear-gradient(55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem, -o-linear-gradient(-55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem;background: -ms-linear-gradient(55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem, -ms-linear-gradient(-55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem;background: linear-gradient(55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem, linear-gradient(-55deg, transparent 46%, white 46%, white 54%, transparent 54%) left/1.6rem 2.2rem;bottom: 10rem;height: 2.6rem;position: absolute;width: 100%;z-index: 1;}

在后面就是本动画的主体部分小火车了，其每一部分都有对应的CSS类来描述，请看代码：

.train {animation: move-train 24s linear infinite;bottom: 12.6rem;height: 10rem;position: absolute;left: calc(100% + 1.3rem);width: 44rem;z-index: 1;}.engine-front, .engine-front::before, .engine-front::after {background: #0f0f0f;background: linear-gradient(0deg, #0f0f0f, #262626, #0f0f0f);border: 0.1rem solid rgba(255, 255, 255, 0.15);border-radius: 50% 0 0 50%;border-right: none;}.engine-front {animation: body-upDown 0.3s infinite;border-radius: 0.5rem 0 0 0.5rem;bottom: 1.4rem;height: 4.6rem;left: 0;position: absolute;width: 8rem;}.engine-front::before, .engine-front::after {content: \"\";position: absolute;height: 70%;left: -0.9rem;top: 50%;transform: translate(0, -50%);width: 0.8rem;}.engine-front::after {height: 40%;left: -1.4rem;width: 0.5rem;}.chimney {background: #990000;height: 2.2rem;left: 2.5rem;position: absolute;top: -2.3rem;width: 1.7rem;}.chimney::before, .chimney::after {content: \"\";position: absolute;}.chimney::before {animation: up-down 0.3s infinite;border-bottom: none;border-left: 0.5rem solid transparent;border-right: 0.5rem solid transparent;border-top: 0.8rem solid orange;left: 50%;top: -0.9rem;transform: translate(-50%, 0);width: 160%;}.smoke {animation: move-smoke 0.4s linear infinite;background: rgba(255, 255, 255, 0.8);border-radius: 50%;height: 1.4rem;left: 0.2rem;position: absolute;top: -1.5rem;width: 0.8rem;z-index: -1;}.smoke-2 {animation-delay: 0.1s;left: 0.4rem;}.smoke-3 {animation-delay: 0.2s;left: 0.6rem;}.smoke-4 {left: 0.8rem;}.engine-body {animation: body-upDown 0.3s 0.1s infinite;background: #b30000;background: linear-gradient(0deg, #330000, red, #990000);border-radius: 0 0 0.4rem 0;bottom: 1.4rem;height: 7rem;left: 8rem;position: absolute;width: 5rem;}.engine-body::before, .engine-body::after {content: \"\";left: 50%;position: absolute;transform: translate(-50%, 0);}.engine-body::before {animation: up-down 0.3s 0.2s infinite;background: #660000;background: linear-gradient(0deg, #660000, #990000, #660000);border-radius: 50% 50% 0 0;height: 1.2rem;top: -1.2rem;width: 130%;}.engine-body::after {background: #b3e0f2;border-radius: 0.2rem;height: 40%;top: 1rem;width: 45%;}.wheel::before, .wheel::after {left: 50%;top: 50%;transform: translate(-50%, -50%);}.wheel-holder {height: 2.8rem;bottom: 0;position: absolute;width: 100%;}.wheel {animation: rotate 2s linear infinite;background: orange;border: 0.3rem solid rgba(0, 0, 0, 0.6);border-radius: 50%;height: 2.8rem;left: 1rem;position: absolute;width: 2.8rem;}.wheel-2 {left: 4.5rem;}.wheel-3 {border-width: 0.5rem;height: 3.8rem;left: 8.7rem;top: -1.1rem;width: 3.8rem;}.wheel-4 {left: 15.7rem;}.wheel-5 {left: 19.5rem;}.wheel-6 {left: 25.7rem;}.wheel-7 {left: 29.5rem;}.wheel-8 {left: 35.7rem;}.wheel-9 {left: 39.5rem;}.wheel::before, .wheel::after {content: \"\";position: absolute;}.wheel::before {background: rgba(0, 0, 0, 0.3);height: 86%;width: 0.2rem;}.wheel::after {background: #996300;background: -webkit-radial-gradient(circle at center, #b37400 30%, #996300 30%);background: -moz-radial-gradient(circle at center, #b37400 30%, #996300 30%);background: -o-radial-gradient(circle at center, #b37400 30%, #996300 30%);background: -ms-radial-gradient(circle at center, #b37400 30%, #996300 30%);background: radial-gradient(circle at center, #b37400 30%, #996300 30%);border-radius: 50%;height: 40%;width: 40%;}.compartment {animation: body-upDown 0.3s infinite;background: #186c8e;background: -webkit-linear-gradient(#104b63 50%, #1f8dba);background: -moz-linear-gradient(#104b63 50%, #1f8dba);background: -o-linear-gradient(#104b63 50%, #1f8dba);background: -ms-linear-gradient(#104b63 50%, #1f8dba);background: linear-gradient(#104b63 50%, #1f8dba);border-radius: 0 0 0.3rem 0.3rem;bottom: 1.4rem;height: 5rem;left: 15rem;position: absolute;width: 8rem;}.compartment-two {animation: body-upDown 0.3s 0.1s infinite;left: 25rem;}.compartment-two .compartment-window::before {animation: up-down 0.3s 0.3s infinite;}.compartment-three {animation: body-upDown 0.3s 0.2s infinite;left: 35rem;}.compartment-three .compartment-window::before {animation: up-down 0.35s infinite;}.compartment::before, .compartment::after {background: black;border: 0.4rem solid transparent;bottom: 0.4rem;box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);content: \"\";height: 0.8rem;position: absolute;width: 0.9rem;}.compartment::before {border-left: 0.4rem solid rgba(255, 255, 255, 0.3);left: -0.9rem;}.compartment::after {border-right: 0.4rem solid rgba(255, 255, 255, 0.3);left: -2rem;}.compartment-window {background: #1f8dba;background: -moz-linear-gradient(90deg, transparent 0.8rem, skyblue 0.8rem) left/2.4rem 100%;background: -webkit-linear-gradient(90deg, transparent 0.8rem, skyblue 0.8rem) left/2.4rem 100%;background: -o-linear-gradient(90deg, transparent 0.8rem, skyblue 0.8rem) left/2.4rem 100%;background: -ms-linear-gradient(90deg, transparent 0.8rem, skyblue 0.8rem) left/2.4rem 100%;background: linear-gradient(90deg, transparent 0.8rem, skyblue 0.8rem) left/2.4rem 100%;height: 40%;position: absolute;top: 0.7rem;width: 100%;}.compartment-window::before, .compartment-window::after {content: \"\";position: absolute;}.compartment-window::before {animation: up-down 0.3s 0.1s infinite;background: #104b63;border-radius: 50% 50% 0 0;height: 0.6rem;left: 50%;top: -1.4rem;transform: translate(-50%, 0);width: 110%;}

到这里为止，我们已经用HTML和CSS代码将整个小火车以及周围的环境都绘制出来了。

那么最重要的一步便是让这辆小火车在桥梁上行驶起来，这就要用到CSS3的一些动画属性了，CSS3的动画帧闪亮登场。

@keyframes up-down {0%, 100% {transform: translate(-50%, 0);}50% {transform: translate(-50%, -0.3rem);}}@keyframes rotate {100% {transform: rotate(-360deg);}}@keyframes move-train {100% {transform: translateX(-154rem);}}@keyframes body-upDown {0%, 100% {transform: translateY(0);}100% {transform: translateY(-0.2rem);}}@keyframes move-smoke {0% {-webkit-filter: blur(0);-moz-filter: blur(0);-o-filter: blur(0);-ms-filter: blur(0);filter: blur(0);opacity: 1;}50% {-webkit-filter: blur(0.2rem);-moz-filter: blur(0.2rem);-o-filter: blur(0.2rem);-ms-filter: blur(0.2rem);filter: blur(0.2rem);opacity: 0.6;transform: translate(0, -3rem) scale(2);}100% {-webkit-filter: blur(0.3rem);-moz-filter: blur(0.3rem);-o-filter: blur(0.3rem);-ms-filter: blur(0.3rem);filter: blur(0.3rem);opacity: 0;transform: translate(2.5rem, -6rem) scale(3);}}@keyframes wheel-joint {100% {transform: rotate(360deg);}}

这些动画中做了几件事情。

第一，让车厢盖子上下拍动，让动画小火车行驶的样子更加逼真。

第二，利用滤镜，非常生动地描绘出了小火车行驶过程中蒸汽机引擎冒出的蒸汽。

第三，让小火车整体在桥梁上周而复始地行驶，车轮也不停的转动。

到这里，整个小火车行驶的动画也就基本完成了。文章最后也将源码献给大家。

源码下载

完整的代码我已经整理出了一个源码包，供大家下载学习。

扫描下方二维码关注我的公众号，回复关键字：1002，即可获取源码下载链接。

代码仅供参考和学习，请不要用于商业用途。

最后总结

这个CSS小火车动画，不仅是HTML代码还是CSS代码，结构都非常清晰，大家也很容易读懂代码。如果觉得不错，请给个赞吧！