Rotating globe in CSS

I am creating a rotating earth effect in CSS. I have created the globe in CSS :

body {
background-color: #111;
}


#earth {
width: 300px;
height: 300px;
background: url(https://web.archive.org/web/20150807125159if_/http://www.noirextreme.com/digital/Earth-Color4096.jpg);
border-radius: 50%;
background-size: 610px;
box-shadow: inset 8px 36px 80px 36px rgb(0, 0, 0),
inset -6px 0 12px 4px rgba(255, 255, 255, 0.3);
animation-name: rotate;
animation-duration: 12s;
animation-iteration-count: infinite;
animation-timing-function: linear;
-webkit-animation-name: rotate;
-webkit-animation-duration: 12s;
-webkit-animation-iteration-count: infinite;
-webkit-animation-timing-function: linear;
}


@keyframes rotate {
from { background-position: 0px 0px; }
to { background-position: 500px 0px; }
}
@-webkit-keyframes rotate {
from { background-position: 0px 0px; }
to { background-position: 500px 0px; }
}
<div id="earth"></div>

But it stops and then image resets and starts again. I want it to move smoothly without jerking. Thank you very much!

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小开
最佳答案

In background-position: 500px 0px; replace 500px with 610px, which is the background-size

body {
background-color: #111;
}
#earth {
width: 300px;
height: 300px;
background: url(https://web.archive.org/web/20150807125159if_/http://www.noirextreme.com/digital/Earth-Color4096.jpg);
border-radius: 50%;
background-size: 610px;
box-shadow: inset 8px 36px 80px 36px rgb(0, 0, 0), inset -6px 0 12px 4px rgba(255, 255, 255, 0.3);
animation-name: rotate;
animation-duration: 12s;
animation-iteration-count: infinite;
animation-timing-function: linear;
-webkit-animation-name: rotate;
-webkit-animation-duration: 12s;
-webkit-animation-iteration-count: infinite;
-webkit-animation-timing-function: linear;
}
@keyframes rotate {
from {
background-position: 0px 0px;
}
to {
background-position: 610px 0px;
}
}
@-webkit-keyframes rotate {
from {
background-position: 0px 0px;
}
to {
background-position: 610px 0px;
}
}
<div id="earth"></div>

小开

The problem in your code is that the imagesize (610px) and the animation's offset (500px) differ and at the reset of the animation it hops (110px).

A simple trick I like to use instead of defining the animation offset in pixel: Define it in percentages.
Instead of telling it to move 610px, I tell it to move 100%.

The bonus of the 100% method is that if you cange the picture, you dont have to alter all hardcoded values in your CSS, which, IMO, should be the prefered method.

Please note: It seems like moving from 0 to -100% creates a hop. Because we need the rotation to go in the right direction, I tried starting 100% and move it to 0, but at this point the image no longer exists.

@keyframes rotate {
from { background-position:  100%  0; }
to {   background-position:    0   0; }
}

Here is the snippet, but with 100% instead of a pixelvalue:
* Please note: The animation still hopped, but I can't test new code because the image no longer exists. The logic works, but this implementation seems not to. The following code is only a demo with the TS's code.

body {
background-color: #111;
}
#earth {
width: 300px;
height: 300px;
background: url(https://web.archive.org/web/20150807125159if_/http://www.noirextreme.com/digital/Earth-Color4096.jpg);
border-radius: 50%;
background-size: 610px;
box-shadow: inset 8px 36px 80px 36px rgb(0, 0, 0), inset -6px 0 12px 4px rgba(255, 255, 255, 0.3);
animation-name: rotate;
animation-duration: 12s;
animation-iteration-count: infinite;
animation-timing-function: linear;
}
@keyframes rotate {
from { background-position:  100%  0; }
to {   background-position:    0   0; }
}
<div id="earth"></div>

小开 

body {
background-color: #111;
}


#earth {
width: 300px;
height: 300px;
background: url(https://zippin.online/wp-content/uploads/2022/02/registration-bg.png);
border-radius: 50%;
background-size: 610px;
box-shadow: inset 8px 36px 80px 36px rgb(0, 0, 0),
inset -6px 0 12px 4px rgba(255, 255, 255, 0.3);
animation-name: rotate;
animation-duration: 12s;
animation-iteration-count: infinite;
animation-timing-function: linear;
-webkit-animation-name: rotate;
-webkit-animation-duration: 12s;
-webkit-animation-iteration-count: infinite;
-webkit-animation-timing-function: linear;
}


@keyframes rotate {
from { background-position: 0px 0px; }
to { background-position: 500px 0px; }
}
@-webkit-keyframes rotate {
from { background-position: 0px 0px; }
to { background-position: 500px 0px; }
}
<div id="earth"></div>

小开 
#earth {
transform: rotate(23.5deg);
}

don't forget update 'axial tilt earth' :-)


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