Creating a CSS sprite animation involves utilizing the `step` function on a sprite sheet that has non-linear and

Question

Creating a CSS sprite animation involves utilizing the `step` function on a sprite sheet that has non-linear and

I have a spritesheet with dimensions 3x5 and I want to create an animation using the step() function in CSS.

Most of the CSS examples available online are for sprite sheets that are 1xnumFrames, but mine is different. I am seeking a purely CSS solution for my 3x5 sprite sheet.

I attempted to use the provided code but encountered a problem where instead of stepping between frames, the animation appeared as a sliding transition from one frame to the next.

CSS

@-webkit-keyframes crystal-wave {
// keyframe values here
}

.crystal-waving {
// styles and animations here
}

HTML

<div class="crystal-waving" style="width:276px; height:372px;"></div>

Here is the texture atlas XML:

<TextureAtlas imagePath="button_cc.png">
<SubTexture name="Button_CC0000" x="0" y="0" width="270" height="314"/>
// more SubTexture elements here
</TextureAtlas>

html css

Answer 1

Answer №1

It seems like using the step() function may not be the best approach for achieving this. Typically, step animations require a start and end condition, with the tweening handled by the function itself. Since you are defining the tweening conditions in your keyframes, ensuring precise math calculations will be challenging (for instance, 100/14 does not result in an evenly divisible number).

Consider exploring alternative methods such as utilizing a linear sprite sheet. If your current workflow does not support this directly, you could potentially restructure it afterwards using a tool like ImageMagick to convert the 2D image into a linear format.

If using a linear sprite sheet is not feasible, one workaround could be to define "boundary" keyframes that enclose your actual transition points, allowing for a quick animation sequence:

0.0% {background-position: 0px 0px;}
7.14285% {background-position: 0px 0px;}
7.14286% {background-position: -270px 0px;}
14.28570% {background-position: -270px 0px;}
14.28571% {background-position: -540px 0px;}
...
etc.

DEMO

Best of luck with your implementation.

Answer 2

It seems like using the step() function may not be the best approach for achieving this. Typically, step animations require a start and end condition, with the tweening handled by the function itself. Since you are defining the tweening conditions in your keyframes, ensuring precise math calculations will be challenging (for instance, 100/14 does not result in an evenly divisible number).

Consider exploring alternative methods such as utilizing a linear sprite sheet. If your current workflow does not support this directly, you could potentially restructure it afterwards using a tool like ImageMagick to convert the 2D image into a linear format.

If using a linear sprite sheet is not feasible, one workaround could be to define "boundary" keyframes that enclose your actual transition points, allowing for a quick animation sequence:

0.0% {background-position: 0px 0px;}
7.14285% {background-position: 0px 0px;}
7.14286% {background-position: -270px 0px;}
14.28570% {background-position: -270px 0px;}
14.28571% {background-position: -540px 0px;}
...
etc.

DEMO

Best of luck with your implementation.

Answer 3

Answer №2

If you need assistance, check out this resource:

Alternatively, you can also take a look at this guide

HTML

<html>
    <head>
        <title>
            Creating Sprite-Sheet Animation
        </title>
        <link rel=”stylesheet” type=”text/css” href=”main.css”>
    </head>
    <body>
        <div class=”animatedDiv”></div>
    </body>
</html>

CSS

.animatedDiv {
    width: 820px;
    height: 312px;
    background-image: url("https://cf.dropboxstatic.com/static/images/index/animation-strips/hero-intro-bg-vflR5rUow.jpg");
    -webkit-animation: play 2s steps(48) infinite;
    -moz-animation: play 2s steps(48) infinite;
    -ms-animation: play 2s steps(48) infinite;
    -o-animation: play 2s steps(48) infinite;
    animation: play 2s steps(48) infinite;
}
@-webkit-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-moz-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-ms-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-o-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}

Answer 4

If you need assistance, check out this resource:

Alternatively, you can also take a look at this guide

HTML

<html>
    <head>
        <title>
            Creating Sprite-Sheet Animation
        </title>
        <link rel=”stylesheet” type=”text/css” href=”main.css”>
    </head>
    <body>
        <div class=”animatedDiv”></div>
    </body>
</html>

CSS

.animatedDiv {
    width: 820px;
    height: 312px;
    background-image: url("https://cf.dropboxstatic.com/static/images/index/animation-strips/hero-intro-bg-vflR5rUow.jpg");
    -webkit-animation: play 2s steps(48) infinite;
    -moz-animation: play 2s steps(48) infinite;
    -ms-animation: play 2s steps(48) infinite;
    -o-animation: play 2s steps(48) infinite;
    animation: play 2s steps(48) infinite;
}
@-webkit-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-moz-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-ms-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@-o-keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}
@keyframes play {
    from {
        background-position: 0px;
    }
    to {
        background-position: -39360px;
    }
}

Creating a CSS sprite animation involves utilizing the `step` function on a sprite sheet that has non-linear and

Answer №1

Answer №2

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