2 Background images with separate animations? - css

This is bugging me, because I know that this is possible, I just don't really know how to write it properly. Here's an image of my vision:
So far in my css, I've implemented the cloud animation
#home{
margin: 0;
padding-top: 327px;
height: 57.78vh;
background: #6bbfff url('../images/clouds.png') repeat-x fixed 50% 10%;
text-align: center;
-webkit-animation: cloudmove 180s infinite linear;
animation: cloudmove 180s infinite linear;
}
#keyframes cloudmove{
0% { background-position: 0% 10%; }
100% { background-position: 100% 10%; }
}
#-webkit-keyframes cloudmove{
0% { background-position: 0% 10%; }
100% { background-position: 500% 10%; }
}
I've been trying to add the landscape illustration in the image shown above as background image number 2, but I'm having trouble. How do I get the css animation to not apply to it?
Thanks!


You do it like this:
Fiddle
Your pertinent CSS relies on some new features of backgrounds in CSS3.
Layered background images
You can instantiate these like so:
.my-rule {
background-image: url(image1.png), url(image2.png);
background-position: 0 0, 50% 50%;
}
It's pretty simple! You just need to separate all rules for each respective background image with commas. That goes straight down to your animations as well, like so:
#keyframes cloudmove{
0% { background-position: 0% 10%, 0% 0%; }
100% { background-position: 100% 10%, 100% 0%; }
}
#-webkit-keyframes cloudmove{
0% { background-position: 0% 10%, 0% 0%; }
100% { background-position: 500% 10%, 100% 0%; }
}
Hope that helps!

Related

Is it possible to make a background-position animation inside svg?

I'm trying to make a gradient animation in the background of a of a svg. Is this possible?
.ani_a {
background-color: #fff;
animation: anibg01 10s infinite linear;
background-image: linear-gradient(0deg,#0d4ba0,#00adee,#00aba5,#37b34a,#8dc63f,#ccdb29,#ffdd15,#fff100,#f6921e,#f05a28,#ec1c24,#ff008b,#90278e,#652d90,#0d4ba0,#00adee);
background-size: 1500% 100%;
}
#keyframes anibg01 {
0% { background-position: 0% 0%; }
100% { background-position: 0% 100%; }
}
<svg>
<polygon class="ani_a" points="35,70 70,70 105,0 70,0 "/>
</svg>

If you are looking to animate the linear gradient (by moving it) within that shape you could take an alternative approach using CSS/HTML rather than SVG to define the shape.
This snippet takes the linear-gradient and makes it the background of a div. The div is clipped to give a shape using clip-path with a polygon and the background is animated to move vertically downwards with repetition.
.ani_a {
background-color: #fff;
animation: anibg01 10s infinite linear;
background-image: linear-gradient(0deg, #0d4ba0, #00adee, #00aba5, #37b34a, #8dc63f, #ccdb29, #ffdd15, #fff100, #f6921e, #f05a28, #ec1c24, #ff008b, #90278e, #652d90, #0d4ba0, #00adee);
background-size: 100% 100%;
width: 20vmin;
height: 10vmin;
display: inline-block;
clip-path: polygon(50% 0, 100% 0, 50% 100%, 0 100%);
}
#keyframes anibg01 {
0% {
background-position: 0% 0%;
}
100% {
background-position: 0 10vmin;
}
}
<div class="ani_a">div</div>

Blur filter not working as intended (blur filter does not update to match gradient animation)

I am trying to create a text with a blurred background so it looks like the text has an aura. So far the code I have is
.testRainbow {
position:fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: white;
z-index: 9999;
}
.testRainbow::before {
content:'';
position:fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 300px;
height:100%;
background: linear-gradient(90deg, #03a9f4, #f441a4, #ffeb3b, #03a9f4);
background-size: 400%;
-moz-animation: slideRainbow 8s linear infinite;
-webkit-animation: slideRainbow 8s linear infinite;
animation: slideRainbow 8s linear infinite;
-moz-filter: blur(1em);
-webkit-filter: blur(1em);
filter: blur(1em);
z-index: -1;
}
#keyframes slideRainbow {
0% {
background-position: 0%;
}
100% {
background-position: 400%;
}
}
#-webkit-keyframes slideRainbow {
0% {
background-position: 0%;
}
100% {
background-position: 400%;
}
}
#-moz-keyframes slideRainbow {
0% {
background-position: 0%;
}
100% {
background-position: 400%;
}
}
<h1 class='testRainbow'>test</h1>
I tested it and it works on Chrome, but it does not work on Safari. Further, I checked that it does not work on mobile Chrome, which is interesting because it works when I open Chrome from my desktop.
The linear gradient is changing as it is supposed to for all browsers, but for the ones that don't work, it seems the blur is not being updated. I checked that while I resize or zoom in, the blur updates to the current gradient. What needs to be changed? Thanks in advance.
EDIT
I fixed the problem, and ran into another problem. I added the filter: blur inside the keyframes as follows:
#keyframes slideRainbow (
0% {
background-position: 0%;
filter: blur(1em);
}
100% {
background-position: 0%;
filter: blur(1em);
}
}
I only have the rainbow gradient here, but there are 3 more colors in the css, and which color is shown is randomized. When the same color is selected twice or more in a row, the animation stops and I have a solid gradient behind the text. When another color is selected, the animation kicks back in.
It is supposed to look like this:
But being selected twice in a row, it becomes like this:

How to infinite zoom in and out smoothly with background image in CSS

The background image isn't smooth when it comes to animate it (some kind of blink) and I can't make it zoom from the image center.
This is for my personnal website I'm trying to make.
*{margin: 0;padding: 0;}
body
{
background-color: #0C090A;
background-image: url(../abstract-bg.png);
animation: zoom 30s infinite;
-webkit-animation: zoom 30s infinite;
}
#keyframes zoom {
0% {
background-size: 100%;
}
50% {
background-size: 105%;
}
100% {
background-size: 100%;
}
}
I would like to get the background image (which is 1920*1080) zoom slowly to 105% of it's original size (or something like that), and then go back to 100%. Also, if it's possible, make it zoom from the center, and not the top left corner. Thanks for those who can help.

yes of course you can :)
just add
background-position:center center;
background-repeat:no-repeat;
in the body css
and add
html{
height: 100%;
}
full css code:
* {
margin: 0;
padding: 0;
}
html {
height: 100%;
}
body {
background-color: #0C090A;
background-image: url(https://images.pexels.com/photos/556416/pexels-photo-556416.jpeg);
animation: zoom 30s infinite;
-webkit-animation: zoom 30s infinite;
background-position: center center;
background-repeat: no-repeat;
}
#keyframes zoom {
0% {
background-size: 100%;
}
50% {
background-size: 150%;
}
100% {
background-size: 100%;
}
}
you can test the code:
https://playcode.io/358401

It's choppy because the animation duration is too long for 5% of the width of the image. either increase the size or decrease the duration of the animation or use a bigger image.
Or you can use scale() which make use of the GPU i believe, However this time we won't be using the image as a background.
body{
overflow-x:hidden;
}
img {
transform-origin: center center;
animation: zoom 30s infinite;
max-width: 100%;
}
#keyframes zoom {
0% {
transform: scale(1);
}
50% {
transform: scale(1.05);
/* equals 105% */
}
100% {
transform: scale(1);
}
}
<img src="https://picsum.photos/id/238/1920/1080">

Percentage background-position working erratically (except on Chromium)

The following image is to be used in a keyframes animation by moving the background-image position 100% to the right on each frame:
The idea is that the ArrowsAnim.png has 7 frames of the same image (the set of 3 chevrons pointing to the right) in different animation states. The animation arrowAnimation (CSS below) simply skips through background-position 0% to 300% to show the first three frames of this image over 0.5 seconds, repeatedly.
What's happening is that when I resize the browser window, I can sometimes see some pixels of the next or previous frame of the animation, instead of having the background perfectly centered around whichever should be the current block, as you can see in the next picture:
So for some reason, background-position is not being calculated correctly.
I also cannot reproduce this issue on Chromium, but I can do so on Chrome, Firefox and Edge.
CSS:
#autoplay-arrow {
display: inline-block;
position: absolute;
width: 5.91549%;
top: 22.05882%;
height: 50.74627%;
margin-left: 18.30986%;
background-size: 100% 100%;
background-position: 0 0;
background-image: url(../graphics/Arrows_002.png);
}
#-moz-keyframes arrowAnimation {
from {
background-position: 300% 0%;
}
to {
background-position: 0% 0%;
}
}
#-webkit-keyframes arrowAnimation {
from {
background-position: 300% 0%;
}
to {
background-position: 0% 0%;
}
}
#keyframes arrowAnimation {
from {
background-position: 300% 0%;
}
to {
background-position: 0% 0%;
}
}
#autoplay-arrow.anim {
background-image: url(../graphics/ArrowsAnim.png);
background-size: 700% 100%;
-moz-animation: arrowAnimation 0.5s steps(3) infinite;
-webkit-animation: arrowAnimation 0.5s steps(3) infinite;
animation: arrowAnimation 0.5s steps(3) infinite;
}

Changing Background Image with CSS3 Animations

Why this isn't working? What am I doing wrong?
CSS
#-webkit-keyframes test {
0% {
background-image: url('frame-01.png');
}
20% {
background-image: url('frame-02.png');
}
40% {
background-image: url('frame-03.png');
}
60% {
background-image: url('frame-04.png');
}
80% {
background-image: url('frame-05.png');
}
100% {
background-image: url('frame-06.png');
}
}
div {
float: left;
width: 200px;
height: 200px;
-webkit-animation-name: test;
-webkit-animation-duration: 10s;
-webkit-animation-iteration-count: 2;
-webkit-animation-direction: alternate;
-webkit-animation-timing-function: linear;
}
DEMO
http://jsfiddle.net/hAGKv/

Updated for 2020: Yes, it can be done! Here's how.
Snippet demo:
#mydiv{ animation: changeBg 1s infinite; width:143px; height:100px; }
#keyframes changeBg{
0%,100% {background-image: url("https://i.stack.imgur.com/YdrqG.png");}
25% {background-image: url("https://i.stack.imgur.com/2wKWi.png");}
50% {background-image: url("https://i.stack.imgur.com/HobHO.png");}
75% {background-image: url("https://i.stack.imgur.com/3hiHO.png");}
}
<div id='mydiv'></div>
Background image [isn't a property that can be animated][1] - you can't tween the property.
Original Answer: (still a good alternative)
Instead, try laying out all the images on top of each other using position:absolute, then animate the opacity of all of them to 0 except the one you want repeatedly.

It works in Chrome 19.0.1084.41 beta!
So at some point in the future, keyframes could really be... frames!
You are living in the future ;)

Works for me.
Notice the use of background-image for transition.
#poster-img {
background-repeat: no-repeat;
background-position: center;
position: absolute;
overflow: hidden;
-webkit-transition: background-image 1s ease-in-out;
transition: background-image 1s ease-in-out;
}

This is really fast and dirty, but it gets the job done: jsFiddle
#img1, #img2, #img3, #img4 {
width:100%;
height:100%;
position:fixed;
z-index:-1;
animation-name: test;
animation-duration: 5s;
opacity:0;
}
#img2 {
animation-delay:5s;
-webkit-animation-delay:5s
}
#img3 {
animation-delay:10s;
-webkit-animation-delay:10s
}
#img4 {
animation-delay:15s;
-webkit-animation-delay:15s
}
#-webkit-keyframes test {
0% {
opacity: 0;
}
50% {
opacity: 1;
}
100% {
}
}
#keyframes test {
0% {
opacity: 0;
}
50% {
opacity: 1;
}
100% {
}
}
I'm working on something similar for my site using jQuery, but the transition is triggered when the user scrolls down the page - jsFiddle

I needed to do the same thing as you and landed on your question. I ended up taking finding about the steps function which I read about from here.
JSFiddle of my solution in action (Note it currently works in Firefox, I'll let you add the crossbrowser lines, trying to keep the solution clean of clutter)
First I created a sprite sheet that had two frames. Then I created the div and put that as the background, but my div is only the size of my sprite (100px).
<div id="cyclist"></div>
#cyclist {
animation: cyclist 1s infinite steps(2);
display: block;
width: 100px;
height: 100px;
background-image: url('../images/cyclist-test.png');
background-repeat: no-repeat;
background-position: top left;
}
The animation is set to have 2 steps and have the whole process take 1 second.
#keyframes cyclist {
0% {
background-position: 0 0;
}
100% {
background-position: 0 -202px; //this should be cleaned up, my sprite sheet is 202px by accident, it should be 200px
}
}
Thiago above mentioned the steps function but I thought I'd elaborate more on it. Pretty simple and awesome stuff.

Your code can work well with some adaptations :
div {
background-position: 50% 100%;
background-repeat: no-repeat;
background-size: contain;
animation: animateSectionBackground infinite 240s;
}
#keyframes animateSectionBackground {
00%, 11% { background-image: url(/assets/images/bg-1.jpg); }
12%, 24% { background-image: url(/assets/images/bg-2.jpg); }
25%, 36% { background-image: url(/assets/images/bg-3.jpg); }
37%, 49% { background-image: url(/assets/images/bg-4.jpg); }
50%, 61% { background-image: url(/assets/images/bg-5.jpg); }
62%, 74% { background-image: url(/assets/images/bg-6.jpg); }
75%, 86% { background-image: url(/assets/images/bg-7.jpg); }
87%, 99% { background-image: url(/assets/images/bg-8.jpg); }
}
Here is the explanation of the percentage to suit your situation:
First you need to calculate the "chunks". If you had 8 differents background, you need to do :
100% / 8 = 12.5% (to simplify you can let fall the decimals) => 12%
After that you obtain that :
#keyframes animateSectionBackground {
00% { background-image: url(/assets/images/bg-1.jpg); }
12% { background-image: url(/assets/images/bg-2.jpg); }
25% { background-image: url(/assets/images/bg-3.jpg); }
37% { background-image: url(/assets/images/bg-4.jpg); }
50% { background-image: url(/assets/images/bg-5.jpg); }
62% { background-image: url(/assets/images/bg-6.jpg); }
75% { background-image: url(/assets/images/bg-7.jpg); }
87% { background-image: url(/assets/images/bg-8.jpg); }
}
If you execute this code, you will see the transition will be permanantly. If you want the backgrounds stay fixed while a moment, you can do like this :
#keyframes animateSectionBackground {
00%, 11% { background-image: url(/assets/images/bg-1.jpg); }
12%, 24% { background-image: url(/assets/images/bg-2.jpg); }
25%, 36% { background-image: url(/assets/images/bg-3.jpg); }
37%, 49% { background-image: url(/assets/images/bg-4.jpg); }
50%, 61% { background-image: url(/assets/images/bg-5.jpg); }
62%, 74% { background-image: url(/assets/images/bg-6.jpg); }
75%, 86% { background-image: url(/assets/images/bg-7.jpg); }
87%, 99% { background-image: url(/assets/images/bg-8.jpg); }
}
That mean you want :
bg-1 stay fixed from 00% to 11%
bg-2 stay fixed from 12% to 24%
etc
By putting 11%, the transtion duration will be 1% (12% - 11% = 1%).
1% of 240s (total duration) => 2.4 seconds.
You can adapt according to your needs.

The linear timing function will animate the defined properties linearly. For the background-image it seems to have this fade/resize effect while changing the frames of you animation (not sure if it is standard behavior, I would go with #Chukie B's approach).
If you use the steps function, it will animate discretely. See the timing function documentation on MDN for more detail. For you case, do like this:
-webkit-animation-timing-function: steps(1,end);
animation-timing-function: steps(1,end);
See this jsFiddle.
I'm not sure if it is standard behavior either, but when you say that there will be only one step, it allows you to change the starting point in the #keyframes section. This way you can define each frame of you animation.

Like the above stated, you can't change the background images in the animation. I've found the best solution to be to put your images into one sprite sheet, and then animate by changing the background position, but if you're building for mobile, your sprite sheets are limited to less than 1900x1900 px.

I needed to do the same thing recently. Here's a simple implementation
#wrapper { width:100%; height:100%; position:relative; }
#wrapper img { position:absolute; top:0; left:0; width:100%; height:auto; display:block; }
#wrapper .top { animation:fadeOut 2s ease-in-out; animation-fill-mode:forwards; }
#keyframes fadeOut {
0% { opacity:1; }
100% { opacity:0; }
}
<div id="wrapper">
<img src="img1.jpg" class="top" style="z-index:2;">
<img src="img2.jpg" style="z-index:1;">
</div>

You can use animated background-position property and sprite image.

You can follow by this code:
#cd{
position: relative;
margin: 0 auto;
height: 281px;
width: 450px;
}
#cf img{
left: 0;
position: absolute;
-moz-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.top:hover{
opacity: 0;
}
<div id="cf">
<img class="button" src="Birdman.jpg" />
<img src="Turtle.jpg" class="top" />
</div>

You can use the jquery-backstretch image which allows for animated slideshows as your background-images!
https://github.com/jquery-backstretch/jquery-backstretch
Scroll down to setup and all of the documentation is there.

Well I can change them in chrome. Its simple and works fine in Chrome using -webkit css properties.

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