Geek asks and answers

Sunrise and sunset are not smooth with CSS3 animations and linear gradient

I am developing Sunrise and Sunset animations using CSS3. Please check jsFiddle output runtime .

The sun goes from one color to another, as expected

Noon

Click for larger image.

enter image description here

Afternoon

Click for larger image.

enter image description here

Evening

Click for larger image.

enter image description here

Night

Click for larger image.

enter image description here

Early morning

Click for larger image.

enter image description here

The problem is the "strong" transition of Sky from one mode to another mode, color changes are sharp and not linear

Code used to change the color of the sky

@-webkit-keyframes changeSkyColor /* Safari and Chrome */
{
    1%{
        background: -webkit-linear-gradient(top, rgba(30, 152, 209, 1) 0%,rgb(202, 229, 243) 40%,rgba(125, 185, 232, 0.82) 100%); /* Background of Sky */
    }
    11%{
        background: -webkit-linear-gradient(top, rgba(30, 152, 209, 1) 0%,rgb(202, 229, 243) 40%,rgba(125, 185, 232, 0.82) 100%); /* Background of Sky */
    }
    33%  {
        background: -webkit-linear-gradient(top, rgb(240, 231, 26) 0%,rgb(245, 86, 12) 50%,rgba(197, 127, 81, 0.82) 100%); /* Background of Sky */
    }
    66%  {
        background: -webkit-linear-gradient(top, rgb(34, 33, 3) 0%,rgb(162, 55, 5) 50%,rgb(24, 10, 1) 100%); /* Background of Sky */
    }
    100% {
        background: -webkit-linear-gradient(top, rgba(5, 5, 5, 1) 0%,rgb(54, 55, 56) 40%,rgb(3, 3, 3) 100%); /* Background of Sky */
    }
}

Please check out the JsFiddle Code (this is with comments) .

  • Shouldn't we use a linear gradient in the animation?
  • If so, how do I make the transparent Sky Color transition smoothly?

- , ? , - , .

+5
1

, , , ( #sky), , . Twitter Bootstrap .

JSFiddle : http://jsfiddle.net/jakebellacera/6Zabx/

CSS, :

#sky {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 900%; /* This must be in a factor of three */
    background-image: -webkit-linear-gradient(top, rgba(30,152,209,1) 0%, rgb(202, 229, 243) 11%, rgba(125, 185, 232, 0.82) 22%,
                                                   rgb(240, 231, 26) 33%, rgb(245, 86, 12) 44%,   rgba(197, 127, 81, 0.82) 55%,
                                                   rgba(5, 5, 5, 1) 66%,  rgb(54, 55, 56) 77%,    rgb(3, 3, 3) 100%);
    background-image: -moz-linear-gradient(top, rgba(30,152,209,1) 0%, rgb(202, 229, 243) 11%, rgba(125, 185, 232, 0.82) 22%,
                                                rgb(240, 231, 26) 33%, rgb(245, 86, 12) 44%,   rgba(197, 127, 81, 0.82) 55%,
                                                rgba(5, 5, 5, 1) 66%,  rgb(54, 55, 56) 77%,    rgb(3, 3, 3) 100%);
    -webkit-animation-name: changeSkyColor; /* Change Shiny Sky to evening sky and to darkness */  /* Safari and Chrome */
    -webkit-animation-duration: 14s; /* Total time of animation */
    -webkit-animation-timing-function: linear; /* Just another timing function */
    -webkit-animation-iteration-count: infinite; /* Lets repeat sunrise and sunset till world ends :) */
    -webkit-animation-direction: alternate; /* Lets do in alternate fashion */
    -moz-animation-name: changeSkyColor; /* Change Shiny Sky to evening sky and to darkness */  /* Mozzilla */
    -moz-animation-duration: 14s; /* Total time of animation */
    -moz-animation-timing-function: linear; /* Just another timing function */
    -moz-animation-iteration-count: infinite; /* Lets repeat sunrise and sunset till world ends :) */
    -moz-animation-direction: alternate; /* Lets do in alternate fashion */
}

@-webkit-keyframes changeSkyColor /* Safari and Chrome */
{
    0%{
        top: 0px;
    }
    100% {
        top: -800%; /* #sky height - 100% */
    }
}
@-moz-keyframes changeSkyColor /* Mozilla */
{

    0%{
        top: 0px;
    }
    100%  {
        top: -800%; /* #sky height - 100% */
    }
}
+4

More articles:


All Articles