css如何實現(xiàn)車軌動畫

這篇文章主要講解了“css如何實現(xiàn)車軌動畫”，文中的講解內(nèi)容簡單清晰，易于學(xué)習(xí)與理解，下面請大家跟著小編的思路慢慢深入，一起來研究和學(xué)習(xí)“css如何實現(xiàn)車軌動畫”吧！

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css實現(xiàn)車軌動畫的方法：1、創(chuàng)建一個HTML文件，并定義div為“<div class="center"><div class="mountains"></div>...</div>”；2、設(shè)置CSS類為mountains和train；3、通過使用CSS3的動畫屬性及動畫幀“@keyframes”實現(xiàn)車軌動畫即可。

效果預(yù)覽

css如何實現(xiàn)車軌動畫

代碼實現(xiàn)

HTML代碼

<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代碼的結(jié)構(gòu)非常清晰，總體來講分兩部分，一部分是作為背景的明月、高山以及星空，對應(yīng)的CSS類為mountains；另一部分則是行駛的火車，對應(yīng)的CSS類為train。

對于火車部分則相對比較復(fù)雜，有車頭、引擎、軌道、車輪、車廂等元素，下面的CSS代碼中會一一講解。

CSS代碼

背景部分繪制了兩座高山，一輪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%;}

然后就是火車軌道的橋梁部分，也十分簡單

.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;}

在后面就是本動畫的主體部分小火車了，其每一部分都有對應(yīng)的CSS類來描述，請看代碼：

.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%;}

到這里為止，我們已經(jīng)用HTML和CSS代碼將整個小火車以及周圍的環(huán)境都繪制出來了。

那么最重要的一步便是讓這輛小火車在橋梁上行駛起來，這就要用到CSS3的一些動畫屬性了，CSS3的動畫幀閃亮登場。

@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);
 }}

這些動畫中做了幾件事情：

  • 讓車廂蓋子上下拍動，讓動畫小火車行駛的樣子更加逼真。

  • 利用濾鏡，非常生動地描繪出了小火車行駛過程中蒸汽機引擎冒出的蒸汽。

  • 讓小火車整體在橋梁上周而復(fù)始地行駛，車輪也不停的轉(zhuǎn)動。

感謝各位的閱讀，以上就是“css如何實現(xiàn)車軌動畫”的內(nèi)容了，經(jīng)過本文的學(xué)習(xí)后，相信大家對css如何實現(xiàn)車軌動畫這一問題有了更深刻的體會，具體使用情況還需要大家實踐驗證。這里是創(chuàng)新互聯(lián)，小編將為大家推送更多相關(guān)知識點的文章，歡迎關(guān)注！

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