css - css3 3D 变换动画不流畅

Question

我发现了这个 CSS3 3D 动画：动画；我正在尝试复制它：副本；但正如你所看到的，我的动画跳跃而不是平滑的另一个是。

我的 HTML 看起来像这样：

<div class="pole-container">
    <div class="pole">

        <div class="stripes-wrapper">
            <span class="stripe-01"></span>
            <span class="stripe-02"></span>
            <span class="stripe-03"></span>
            <span class="stripe-04"></span>
            <span class="stripe-05"></span>
            <span class="stripe-06"></span>
            <span class="stripe-07"></span>
            <span class="stripe-08"></span>
            <span class="stripe-09"></span>
            <span class="stripe-10"></span>
            <span class="stripe-11"></span>
            <span class="stripe-12"></span>
        </div>

    </div>
</div>

和 CSS ：

.preloader-container {
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: #FFFFFF;
    z-index: 5;

    opacity: 1;

    -webkit-transition: all 500ms ease-out;
       -moz-transition: all 500ms ease-out;
         -o-transition: all 500ms ease-out;
            transition: all 500ms ease-out;
}

.preloader-container.hidden {
    display: block !important;
    visibility: visible;
    opacity: 0;
    z-index: 0;
    pointer-events: none;

}

.pole-container {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -20px;
    white-space: nowrap;
    overflow: hidden;
    -webkit-transform: rotate(-90deg);
    -moz-transform: rotateX902deg);
    -ms-transform: rotate(-90deg);
    -o-transform: rotate(-90deg);
    transform: rotate(-90deg);
}

.pole-container::after {
    position: absolute;
    display: block;
    content: "";
}


.stripes-wrapper {
    white-space: nowrap;   
   -webkit-animation: WEBKIT-BP .5s linear infinite;
   -moz-animation: MOZ-BP .5s linear infinite;
   -ms-animation: MS-BP .5s linear infinite;
   -o-animation: O-BP .5s linear infinite;
   animation: BP .5s linear infinite;
}

.stripes-wrapper span {
    margin: 0;
    display: inline-block;
    margin-left: 10px;
    width: 10px;
    height: 40px;
    background: #9FCBDA;
    -webkit-transform: skew(32deg);
    -moz-transform: skewX(32deg);
    -ms-transform: skew(32deg);
    -o-transform: skew(32deg);
    transform: skew(32deg);
}

谁能指出我的动画没有以同样的方式表演的原因，我会很感激吗？

score 4 · Accepted Answer

Here's your answer:

http://jsfiddle.net/gPsdk/40/

.preloader-container {
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: #FFFFFF;
    z-index: 5;

    opacity: 1;

    -webkit-transition: all 500ms ease-out;
       -moz-transition: all 500ms ease-out;
         -o-transition: all 500ms ease-out;
            transition: all 500ms ease-out;
}

.preloader-container.hidden {
    display: block !important;
    visibility: visible;
    opacity: 0;
    z-index: 0;
    pointer-events: none;

}

.pole-container {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -20px;
    white-space: nowrap;
    overflow: hidden;
    -webkit-transform: rotate(-90deg);
    -moz-transform: rotateX902deg);
    -ms-transform: rotate(-90deg);
    -o-transform: rotate(-90deg);
    transform: rotate(-90deg);
}

.pole-container::after {
    position: absolute;
    display: block;
    content: "";
}


.stripes-wrapper {
    white-space: nowrap;   
   -webkit-animation: WEBKIT-BP .5s linear infinite;
   -moz-animation: MOZ-BP .5s linear infinite;
   -ms-animation: MS-BP .5s linear infinite;
   -o-animation: O-BP .5s linear infinite;
   animation: BP .5s linear infinite;
}

.stripes-wrapper span {
    margin: 0;
    display: inline-block;
    margin-left: 10px;
    width: 10px;
    height: 40px;
    background: #9FCBDA;
    -webkit-transform: skew(32deg);
    -moz-transform: skewX(32deg);
    -ms-transform: skew(32deg);
    -o-transform: skew(32deg);
    transform: skew(32deg);
}

span.stripe-01 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-02 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-03 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-04 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-05 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-06 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-07 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-08 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-09 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-10 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-11 {
    background-color: rgba(217, 007, 045, 1);
}

span.stripe-12 {
    background-color: rgba(217, 007, 045, 1);
}


@-webkit-keyframes WEBKIT-BP {
    0%   {
        -webkit-transform: translate3D(-30px, 0, 0);
    }

    100% {
        -webkit-transform: translate3D(-6px, 0, 0);
    }
}

@-moz-keyframes MOZ-BP {
    0%   {
        -moz-transform: translateX(-30px);
    }
    100% {
        -moz-transform: translateX(-6px);
    }
}
@-ms-keyframes MS-BP {
    0%   {
        -ms-transform: translateX(-30px);
    }
    100% {
        -ms-transform: translateX(-6px);
    }
}
@-o-keyframes O-BP {
    0%   {
        -o-transform: translateX(-30px);
    }
    100% {
        -o-transform: translateX(-6px);
    }
}
@keyframes BP {
    0%   {
        transform: translateX(-30px);
    }
    100% {
        transform: translateX(-6px);
    }
}

Now, there are two reasons why the animation 'jumps'. One is that 'Animation' has only one colour stripe, a blue one, where as 'Replica' has two colour stripes, red and blue. The key frames only work by tricking the eye into thinking its seeing the same one stripe travelling all the way across the bar. This only works when it remains the same colour!

Though my jsfiddle will work with two colours, the effect is it's the same stripe travelling across the bar, but it is alternating between red and blue as it travels. Not intrinsically a bad effect, but that's why Replica doesn't work as well as Animation. The code only supports one colour. Two colours is fine, but it'll require some trial and error to find out the distance the stripes must travel, as well as their number, their width and the distance between them.

The second reason is your key frames weren't syncronised properly.

"Animation" moves its stripes 20 pixels along before looping, and that's fine, because the distance between the stripes and the number of stripes and the width of the stripes means this distance succesfully tricks the eye into thinking its seeing the same stripe moving all the way across the bar.

0%   {
    -webkit-transform: translate3D(-30px,0,0);
}
100% {
    -webkit-transform: translate3D(-10px,0,0);
}

With "Replica", though the number of stripes is the same, the distance between them is different, resulting in a jarring effect where the bars seem to 'jump'. In reality, the animation is simply looping too soon, and the bars aren't moving across the required distance for the animation to fool the eye. Due to this, with a bit of trial an error, I found that a distance of 24px is the smoothest distance:

@-webkit-keyframes WEBKIT-BP {
    0%   {
        -webkit-transform: translate3D(-30px, 0, 0);
    }

    100% {
        -webkit-transform: translate3D(-6px, 0, 0);
    }
}

score 1 · Accepted Answer

按照罗兰所说的，试试这些：

    .bs-stripes-wrapper {
    height: 40px;
    white-space: nowrap;   
   -webkit-animation: WEBKIT-BP 1s linear infinite;
   -moz-animation: MOZ-BP 1s linear infinite;
   -ms-animation: MS-BP 1s linear infinite;
   -o-animation: O-BP 1s linear infinite;
   animation: BP 1s linear infinite;
}

并更改这些：

@-webkit-keyframes WEBKIT-BP {
    0%   {
        -webkit-transform: translate3D(-60px, 0, 0);
    }

    100% {
        -webkit-transform: translate3D(-12px, 0, 0);
    }
}

@-moz-keyframes MOZ-BP {
    0%   {
        -moz-transform: translateX(-60px);
    }
    100% {
        -moz-transform: translateX(-12px);
    }
}
@-ms-keyframes MS-BP {
    0%   {
        -ms-transform: translateX(-60px);
    }
    100% {
        -ms-transform: translateX(-12px);
    }
}
@-o-keyframes O-BP {
    0%   {
        -o-transform: translateX(-60px);
    }
    100% {
        -o-transform: translateX(-12px);
    }
}
@keyframes BP {
    0%   {
        transform: translateX(-60px);
    }
    100% {
        transform: translateX(-12px);
    }
}

由于您有两条线，因此您需要移动两倍的距离，并且由于距离更大，因此需要以两倍的速度移动。

我不确定您是否真的从以这种方式制作动画中受益，但这是一个有趣的实验。

css - css3 3D 变换动画不流畅

2 回答 2

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