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Animation CSS, position absolue va de l'écran à droite et revient de la gauche

Je fais un site avec quelques nuages. Je veux que les nuages ​​traversent l'écran de gauche à droite. J'ai les nuages ​​qui bougent mais je suis un peu coincé sur un aspect. Je veux que certains nuages ​​soient à l'écran lors du chargement de la page. Je veux que ces nuages ​​commencent à bouger et sortent de l'écran à droite, puis reviennent de la gauche et continuent. 

Voici une image qui peut l'expliquer un peu mieux:  enter image description here

Voici le code:

<div class="clouds">
    <div class="firstCloud">        
        <svg id="svgCloud" data-name="clouder" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 164"><defs><style>.cloud1Fill{fill:#d1dbd9;}</style></defs><title>Untitled-5</title><path class="cloud1Fill" d="M348,107.5a54.5,54.5,0,0,1-94.87,36.61,77.55,77.55,0,0,1-81.57-1.43A73,73,0,0,1,71,145.07,42.48,42.48,0,1,1,49.61,71.59,73,73,0,0,1,154.85,26.84,77.51,77.51,0,0,1,287.16,53.37,53,53,0,0,1,293.5,53,54.5,54.5,0,0,1,348,107.5Z"/></svg>
    </div>  
    <div class="secondCloud">
        <svg id="svgCloud2" data-name="cloud2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 291 124"><defs><style>.cloud1Fill{fill:#d3dddb;}.cloud2Fill{fill:#fff;}</style></defs><title>Untitled-4</title><path class="cloud1Fill" d="M2.29,123.5A41,41,0,0,1,58.37,74.12l.32.14.24-.25A45.72,45.72,0,0,1,91.5,60.5q1.14,0,2.25.06l.43,0,.09-.41a76,76,0,0,1,148.46,0l.09.4h.41l1.27,0a46.06,46.06,0,0,1,46,46,45.53,45.53,0,0,1-3.26,17Z"/><path class="cloud2Fill" d="M168.5,1a75.53,75.53,0,0,1,73.74,59.23l.18.81.82,0,1.26,0a45.49,45.49,0,0,1,42.4,62H2.66A40.53,40.53,0,0,1,58.17,74.57l.63.29.49-.49A45.2,45.2,0,0,1,91.5,61c.75,0,1.5,0,2.23.06l.85,0,.18-.83A75.51,75.51,0,0,1,168.5,1m0-1A76.52,76.52,0,0,0,93.78,60.06Q92.66,60,91.5,60A46.35,46.35,0,0,0,58.58,73.66,41.52,41.52,0,0,0,1.92,124H287.58A46.5,46.5,0,0,0,244.5,60l-1.28,0A76.53,76.53,0,0,0,168.5,0Z"/></svg>
    </div>
    <div class="thirdCloud">
        <svg id="svgClouds3" data-name="clouds2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 329 139"><defs><style>.cloud2Fill{fill:#d1dbd9;}</style></defs><title>Untitled-6</title><path class="cloud2Fill" d="M329,125a40.09,40.09,0,0,1-2.52,14H14.9A61.28,61.28,0,0,1,0,99C0,64.21,29.33,36,65.5,36a67.34,67.34,0,0,1,30,7A86,86,0,0,1,236.42,31.37,55.53,55.53,0,0,1,311,83.5a56.67,56.67,0,0,1-.55,7.75A39.93,39.93,0,0,1,329,125Z"/></svg>
    </div>    
</div>

.firstCloud {
    position: absolute;
    left: 0;
    top: 150px;
    animation: move 50s linear 2s infinite;
    width: 150px;
}

.secondCloud {
    position: absolute;
    left: 50%;
    top: 200px;
    animation: move 55s linear 0s infinite backwards;
    width: 150px;
}

.thirdCloud {
    top: 250px;
    left: 10%;
    position: absolute;
    animation: move 60s linear 10s infinite backwards;
    width: 150px;
}

@-webkit-keyframes move {
  from {-webkit-transform: translateX(-400px);}
  to {-webkit-transform: translateX(2000px);}
}

Voici un codepen

J'ai cherché partout mais je pense que mon Google-Fu m'a échoué dans mes recherches. Est-ce que quelqu'un peut-il me montrer la bonne direction?

cssanimation
7
William Cunningham

Voici la solution que j'ai proposée dans les commentaires précédents:

Vous pouvez créer un nuage initial (.initalCloud) qui glisse simplement hors de l'écran et est remplacé par le .firstCloud normal par la suite.

.clouds {
  position: relative;
  overflow: hidden;
  height: 400px;
}

.initialCloud {
  position: absolute;
  left: 100%;
  top: 150px;
  animation: moveFirst 5s linear .2s;
  animation-iteration-count: 1;
  width: 150px;
}

.firstCloud {
  position: absolute;
  left: -30%;
  top: 150px;
  animation: move 5s linear 5s infinite;
  width: 150px;
}

.secondCloud {
  position: absolute;
  left: -30%;
  top: 200px;
  animation: move 8s linear 0s infinite;
  width: 150px;
}

.thirdCloud {
  top: 250px;
  left: -30%;
  position: absolute;
  animation: move 11s linear 1s infinite;
  width: 150px;
}

@-webkit-keyframes move {
  from {
    left: -30%;
  }
  to {
    left: 100%;
  }
}

@-webkit-keyframes moveFirst {
  from {
    left: 50%;
  }
  to {
    left: 100%;
  }
}
<div class="clouds">
  <div class="initialCloud">
    <svg id="svgCloud" data-name="clouder" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 164"><defs><style>.cloud1Fill{fill:#d1dbd9;}</style></defs><title>Untitled-5</title><path class="cloud1Fill" d="M348,107.5a54.5,54.5,0,0,1-94.87,36.61,77.55,77.55,0,0,1-81.57-1.43A73,73,0,0,1,71,145.07,42.48,42.48,0,1,1,49.61,71.59,73,73,0,0,1,154.85,26.84,77.51,77.51,0,0,1,287.16,53.37,53,53,0,0,1,293.5,53,54.5,54.5,0,0,1,348,107.5Z"/></svg>
  </div>
  <div class="firstCloud">
    <svg id="svgCloud" data-name="clouder" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 164"><defs><style>.cloud1Fill{fill:#d1dbd9;}</style></defs><title>Untitled-5</title><path class="cloud1Fill" d="M348,107.5a54.5,54.5,0,0,1-94.87,36.61,77.55,77.55,0,0,1-81.57-1.43A73,73,0,0,1,71,145.07,42.48,42.48,0,1,1,49.61,71.59,73,73,0,0,1,154.85,26.84,77.51,77.51,0,0,1,287.16,53.37,53,53,0,0,1,293.5,53,54.5,54.5,0,0,1,348,107.5Z"/></svg>
  </div>
  <div class="secondCloud">
    <svg id="svgCloud2" data-name="cloud2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 291 124"><defs><style>.cloud1Fill{fill:#d3dddb;}.cloud2Fill{fill:#fff;}</style></defs><title>Untitled-4</title><path class="cloud1Fill" d="M2.29,123.5A41,41,0,0,1,58.37,74.12l.32.14.24-.25A45.72,45.72,0,0,1,91.5,60.5q1.14,0,2.25.06l.43,0,.09-.41a76,76,0,0,1,148.46,0l.09.4h.41l1.27,0a46.06,46.06,0,0,1,46,46,45.53,45.53,0,0,1-3.26,17Z"/><path class="cloud2Fill" d="M168.5,1a75.53,75.53,0,0,1,73.74,59.23l.18.81.82,0,1.26,0a45.49,45.49,0,0,1,42.4,62H2.66A40.53,40.53,0,0,1,58.17,74.57l.63.29.49-.49A45.2,45.2,0,0,1,91.5,61c.75,0,1.5,0,2.23.06l.85,0,.18-.83A75.51,75.51,0,0,1,168.5,1m0-1A76.52,76.52,0,0,0,93.78,60.06Q92.66,60,91.5,60A46.35,46.35,0,0,0,58.58,73.66,41.52,41.52,0,0,0,1.92,124H287.58A46.5,46.5,0,0,0,244.5,60l-1.28,0A76.53,76.53,0,0,0,168.5,0Z"/></svg>
  </div>
  <div class="thirdCloud">
    <svg id="svgClouds3" data-name="clouds2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 329 139"><defs><style>.cloud2Fill{fill:#d1dbd9;}</style></defs><title>Untitled-6</title><path class="cloud2Fill" d="M329,125a40.09,40.09,0,0,1-2.52,14H14.9A61.28,61.28,0,0,1,0,99C0,64.21,29.33,36,65.5,36a67.34,67.34,0,0,1,30,7A86,86,0,0,1,236.42,31.37,55.53,55.53,0,0,1,311,83.5a56.67,56.67,0,0,1-.55,7.75A39.93,39.93,0,0,1,329,125Z"/></svg>
  </div>
</div>

6
Maharkus

utiliser la propriété left au lieu de translateX() car vous pouvez utiliser un pourcentage dans l'écran de gauche et détecter l'écran de fin.

.clouds {
  position: relative;
  overflow: hidden;
  height: 400px;
}

.firstCloud {
  position: absolute;
  left: -150px;
  top: 150px;
  animation: move 10s linear 2s infinite;
  width: 150px;
}

.secondCloud {
  position: absolute;
  left: -150px;
  top: 200px;
  animation: move 15s linear 0s infinite;
  width: 150px;
  }

.thirdCloud {
  top: 250px;
  left: -150px;
  position: absolute;
  animation: move 20s linear 5s infinite;
  width: 150px;
}

@-webkit-keyframes move {
  from {left: -150px;}
  to {left: 100%;}
}
  <div class="clouds">
    <div class="firstCloud">        
        <svg id="svgCloud" data-name="clouder" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 164"><defs><style>.cloud1Fill{fill:#d1dbd9;}</style></defs><title>Untitled-5</title><path class="cloud1Fill" d="M348,107.5a54.5,54.5,0,0,1-94.87,36.61,77.55,77.55,0,0,1-81.57-1.43A73,73,0,0,1,71,145.07,42.48,42.48,0,1,1,49.61,71.59,73,73,0,0,1,154.85,26.84,77.51,77.51,0,0,1,287.16,53.37,53,53,0,0,1,293.5,53,54.5,54.5,0,0,1,348,107.5Z"/></svg>
    </div>  
    <div class="secondCloud">
        <svg id="svgCloud2" data-name="cloud2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 291 124"><defs><style>.cloud1Fill{fill:#d3dddb;}.cloud2Fill{fill:#fff;}</style></defs><title>Untitled-4</title><path class="cloud1Fill" d="M2.29,123.5A41,41,0,0,1,58.37,74.12l.32.14.24-.25A45.72,45.72,0,0,1,91.5,60.5q1.14,0,2.25.06l.43,0,.09-.41a76,76,0,0,1,148.46,0l.09.4h.41l1.27,0a46.06,46.06,0,0,1,46,46,45.53,45.53,0,0,1-3.26,17Z"/><path class="cloud2Fill" d="M168.5,1a75.53,75.53,0,0,1,73.74,59.23l.18.81.82,0,1.26,0a45.49,45.49,0,0,1,42.4,62H2.66A40.53,40.53,0,0,1,58.17,74.57l.63.29.49-.49A45.2,45.2,0,0,1,91.5,61c.75,0,1.5,0,2.23.06l.85,0,.18-.83A75.51,75.51,0,0,1,168.5,1m0-1A76.52,76.52,0,0,0,93.78,60.06Q92.66,60,91.5,60A46.35,46.35,0,0,0,58.58,73.66,41.52,41.52,0,0,0,1.92,124H287.58A46.5,46.5,0,0,0,244.5,60l-1.28,0A76.53,76.53,0,0,0,168.5,0Z"/></svg>
    </div>
    <div class="thirdCloud">
        <svg id="svgClouds3" data-name="clouds2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 329 139"><defs><style>.cloud2Fill{fill:#d1dbd9;}</style></defs><title>Untitled-6</title><path class="cloud2Fill" d="M329,125a40.09,40.09,0,0,1-2.52,14H14.9A61.28,61.28,0,0,1,0,99C0,64.21,29.33,36,65.5,36a67.34,67.34,0,0,1,30,7A86,86,0,0,1,236.42,31.37,55.53,55.53,0,0,1,311,83.5a56.67,56.67,0,0,1-.55,7.75A39.93,39.93,0,0,1,329,125Z"/></svg>
    </div>    
</div>

Utilisez jquery si vous voulez commencer l'animation de l'écran central Juste pour une fois:

$(document).ready(function(){
  $('.firstCloud,.secondCloud,.thirdCloud').animate({
     left:"100%"
  },10000,function(){$(this).addClass('anim')})
})
.clouds {
  position: relative;
  overflow: hidden;
  height: 400px;
}

.firstCloud {
  position: absolute;
  left: 0;
  top: 150px;
  animation-duration: 10s;
  animation-delay: 2s;
  width: 150px;
}

.secondCloud {
  position: absolute;
  left:  50%;
  top: 200px;
  animation-duration: 15s;
  width: 150px;
  }

.thirdCloud {
  top: 250px;
  left: 10%;
  position: absolute;
  animation-duration: 20s;
  animation-delay: 2s;
  width: 150px;
}


.anim {
  animation-name: move;
  animation-iteration-count: infinite;
}

@-webkit-keyframes move {
  from {left: -150px;}
  to {left: 100%;}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="clouds">
    <div class="firstCloud">        
        <svg id="svgCloud" data-name="clouder" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 164"><defs><style>.cloud1Fill{fill:#d1dbd9;}</style></defs><title>Untitled-5</title><path class="cloud1Fill" d="M348,107.5a54.5,54.5,0,0,1-94.87,36.61,77.55,77.55,0,0,1-81.57-1.43A73,73,0,0,1,71,145.07,42.48,42.48,0,1,1,49.61,71.59,73,73,0,0,1,154.85,26.84,77.51,77.51,0,0,1,287.16,53.37,53,53,0,0,1,293.5,53,54.5,54.5,0,0,1,348,107.5Z"/></svg>
    </div>  
    <div class="secondCloud">
        <svg id="svgCloud2" data-name="cloud2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 291 124"><defs><style>.cloud1Fill{fill:#d3dddb;}.cloud2Fill{fill:#fff;}</style></defs><title>Untitled-4</title><path class="cloud1Fill" d="M2.29,123.5A41,41,0,0,1,58.37,74.12l.32.14.24-.25A45.72,45.72,0,0,1,91.5,60.5q1.14,0,2.25.06l.43,0,.09-.41a76,76,0,0,1,148.46,0l.09.4h.41l1.27,0a46.06,46.06,0,0,1,46,46,45.53,45.53,0,0,1-3.26,17Z"/><path class="cloud2Fill" d="M168.5,1a75.53,75.53,0,0,1,73.74,59.23l.18.81.82,0,1.26,0a45.49,45.49,0,0,1,42.4,62H2.66A40.53,40.53,0,0,1,58.17,74.57l.63.29.49-.49A45.2,45.2,0,0,1,91.5,61c.75,0,1.5,0,2.23.06l.85,0,.18-.83A75.51,75.51,0,0,1,168.5,1m0-1A76.52,76.52,0,0,0,93.78,60.06Q92.66,60,91.5,60A46.35,46.35,0,0,0,58.58,73.66,41.52,41.52,0,0,0,1.92,124H287.58A46.5,46.5,0,0,0,244.5,60l-1.28,0A76.53,76.53,0,0,0,168.5,0Z"/></svg>
    </div>
    <div class="thirdCloud">
        <svg id="svgClouds3" data-name="clouds2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 329 139"><defs><style>.cloud2Fill{fill:#d1dbd9;}</style></defs><title>Untitled-6</title><path class="cloud2Fill" d="M329,125a40.09,40.09,0,0,1-2.52,14H14.9A61.28,61.28,0,0,1,0,99C0,64.21,29.33,36,65.5,36a67.34,67.34,0,0,1,30,7A86,86,0,0,1,236.42,31.37,55.53,55.53,0,0,1,311,83.5a56.67,56.67,0,0,1-.55,7.75A39.93,39.93,0,0,1,329,125Z"/></svg>
    </div>    
</div>

2
Ehsan

J'ai fait cela rapidement juste pour vous montrer le concept.

Au début, je définissais la position de départ du nuage à 50 pixels de la gauche, puis je définissais une animation, mais avec une seule itération.

Ensuite, j'ai créé un deuxième nuage avec une animation infinie, mais je lui ai également attribué un délai. De cette façon, vous donnez l’illusion que la première animation est en boucle, même s’il s’agit de deux éléments et animations différents.

C’est la seule façon pour moi de penser en utilisant uniquement CSS.

.wrapper {
  position: relative;
}

.clouds {
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: gray;
}

.clouds.cloud1 {
  left: 50px;
  animation: cloud1 20s linear 1;
}

.clouds.cloud2 {
  left: -50px;
  animation: cloud1 20s 10s linear 1;
}

@keyframes cloud1 {
  0% {
    left: 20px;
  }
  100% {
    left: 3000px;
  }
}

@keyframes cloud2 {
  0% {
    left: -50px;
  }
  100% {
    left: 3000px;
  }
}
<div class="wrapper">
	<div class="clouds cloud1"></div>
	<div class="clouds cloud2"></div>
</div>

0
Mehdi Brillaud