【发布时间】:2015-09-17 02:24:37
【问题描述】:
我正在尝试创建一种材质设计,例如 SVG 圆圈上的阴影。当你点击圆圈时,我希望这个阴影随着一个很好的过渡而增长,但目前我什至在努力弄清楚是否可以为这个过渡设置动画,所以我希望有人能提供帮助。
我已经添加了一个小例子来说明我目前所做的,一个带有阴影的圆圈,鼠标悬停时会发生变化。我花了很长时间尝试在 CSS 中做阴影,但得出的结论是我认为现在不可能。
现在我已经有了阴影,但我找不到动画方法。我找到了一些使用动画标签作为单个属性(例如圆圈的颜色)的示例,并找到了使用关键帧进行 CSS 转换的示例,但在这里我想修改实际的过滤器本身。这可能吗?有人可以说明您如何实现这一目标 - 理想情况下,我正在尝试实现 IE10/FF/Chrome 兼容性,所以我很想知道该解决方案是否有任何并发症?
circle {
fill: #8BC34A;
stroke: white;
stroke-width: 2px;
filter: url(#f1);
transition: 2s ease;
}
circle:hover {
filter: url(#f2);
transition: 2s ease;
}
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="500" height="500" viewPort="0 0 200 200">
<defs>
<filter id="f1" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="0" />
<feGaussianBlur result="blurOut" in="offOut" stdDeviation="10" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f2" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="0" />
<feGaussianBlur result="blurOut" in="offOut" stdDeviation="30" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>
<circle r="100" cx="150" cy="150" />
</svg>
更新
在尝试了一些事情之后,我将一些示例放在一起,尽管没有一个完全符合我的要求。我需要能够在单个/多个元素(而不是 SVG 中的每个圆圈)上切换转换,我可能有数百个元素。我最终还想改变圆的大小(根据材料设计提升),然后增加下方阴影的侧面。
/*************************/
/* JavaScript Animations */
/*************************/
(function() {
var svg = d3.select("#svg_javaScriptAnimation");
setInterval(function() {
// Animate
svg.selectAll(".circle")
.transition()
.duration(1950)
.attr("r", 130);
svg.selectAll(".jA_shadow")
.transition()
.duration(1950)
.attr("r", 130);
svg.selectAll(".jA_shadow_expanding")
.transition()
.duration(1950)
.attr("r", 140);
svg.selectAll(".jA_shadow_large")
.transition()
.duration(1950)
.attr("r", 110);
// Reset
svg.selectAll(".circle")
.transition()
.delay(1960)
.duration(1)
.attr("r", 110);
svg.selectAll(".jA_shadow")
.transition()
.delay(1960)
.duration(1)
.attr("r", 110);
svg.selectAll(".jA_shadow_expanding")
.transition()
.delay(1960)
.duration(1)
.attr("r", 110);
svg.selectAll(".jA_shadow_large")
.transition()
.delay(1960)
.duration(1)
.attr("r", 80);
}, 2000);
})();
circle {
fill: #8BC34A;
stroke: white;
stroke-width: 2px;
}
text {
fill: white;
}
/*****************/
/* CSS KeyFrames */
/*****************/
#svg_keyframes{
animation:filters 2s infinite;
}
@-webkit-keyframes filters {
0%{
-webkit-filter:drop-shadow(0px 16px 10px #333);
}
100% {
-webkit-filter:drop-shadow(0px 16px 30px #333);
}
}
/***********************************/
/* CSS KeyFrames using SVG Filters */
/***********************************/
.kf_Shadow1 {
-webkit-animation-name: shadow-expand; / Chrome, Safari, Opera /
-webkit-animation-duration: 2s; / Chrome, Safari, Opera /
-webkit-animation-iteration-count: infinite;
animation-name: shadow-expand;
animation-duration: 2s;
animation-iteration-count: infinite;
}
.kf_Fill1 {
-webkit-animation-name: circle-fill; / Chrome, Safari, Opera /
-webkit-animation-duration: 2s; / Chrome, Safari, Opera /
-webkit-animation-iteration-count: infinite;
animation-name: circle-fill;
animation-duration: 2s;
animation-iteration-count: infinite;
}
.kf_DropShadow1 {
-webkit-animation-name: drop-shadow-expand; / Chrome, Safari, Opera /
-webkit-animation-duration: 2s; / Chrome, Safari, Opera /
-webkit-animation-iteration-count: infinite;
animation-name: drop-shadow-expand;
animation-duration: 2s;
animation-iteration-count: infinite;
}
/* Demonstrate that fill works correctly */
@keyframes circle-fill {
0% { fill: #FF0000; }
25% { fill: #BB0033; }
50% { fill: #990066; }
75% { fill: #4400aa; }
100% { fill: #0000ff; }
}
/* Demonstrate that filter doesn't work as hoped */
@keyframes shadow-expand {
0% { filter: url(#f1); -webkit-filter: url(#f1);}
25% { filter: url(#f2); -webkit-filter: url(#f1);}
50% { filter: url(#f3); -webkit-filter: url(#f1);}
75% { filter: url(#f4); -webkit-filter: url(#f1);}
100% { filter: url(#f5); -webkit-filter: url(#f1);}
}
@keyframes drop-shadow-expand {
0% { -webkit-filter:drop-shadow(0px 16px 10px #333); }
25% { -webkit-filter:drop-shadow(0px 16px 15px #333); }
50% { -webkit-filter:drop-shadow(0px 16px 20px #333); }
75% { -webkit-filter:drop-shadow(0px 16px 25px #333); }
100% { -webkit-filter:drop-shadow(0px 16px 30px #333); }
}
/*************************/
/* SVG Filter Animations */
/*************************/
.fA_shadow {
filter: url(#f1);
}
/*************************/
/* JavaScript Animations */
/*************************/
.jA_shadow {
filter: url(#f1);
stroke: none !important;
}
.jA_shadow_expanding {
filter: url(#f1);
stroke: none !important;
fill: #CCC !important;
}
.jA_shadow_large {
filter: url(#f2);
stroke: none !important;
fill: #CCC !important;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<h1>CSS Keyframes</h1>
<p>The downside here is that the animation seems to require attaching to the svg element, which causes all of the circles to animate their drop shadows</p>
<svg id="svg_keyframes" width="1000" height="280">
<g transform="translate(120, 140)">
<circle r="110"/>
<text dx="-1.5em">Circle 1</text>
</g>
<g transform="translate(420, 140)">
<circle r="110"/>
<text dx="-1.5em">Circle 2</text>
</g>
</svg>
<h1>CSS Keyframes referencing SVG Filters</h1>
<p>Unfortunately it seems that this approach simply doesn't work. The idea was that the class would change triggering a keyframe which would progressively change the filter being applied by specifying gradually expanding filters</p>
<svg id="svg_filterKeyFrames" width="1000" height="280">
<defs>
<filter id="f1" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="4" />
<feGaussianBlur result="blurOut" in="matrixOut" stdDeviation="10" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f2" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="7" />
<feGaussianBlur result="blurOut" in="matrixOut" stdDeviation="15" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f3" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="10" />
<feGaussianBlur result="blurOut" in="matrixOut" stdDeviation="20" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f4" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="13" />
<feGaussianBlur result="blurOut" in="matrixOut" stdDeviation="25" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f5" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="16" />
<feGaussianBlur result="blurOut" in="matrixOut" stdDeviation="30" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>
<g transform="translate(120, 140)">
<circle class="kf_Shadow1" r="110"/>
<text dx="-4.5em">Shadow should change</text>
</g>
<g transform="translate(420, 140)">
<circle class="kf_Fill1" r="110"/>
<text dx="-4.5em">Colour should change</text>
</g>
<g transform="translate(720, 140)">
<circle class="kf_DropShadow1" r="110"/>
<text dx="-5.5em">Drop Shadow should change</text>
</g>
</svg>
<h1>SVG Filters Animations</h1>
<p>SVG filter animations are another way to tackle this problem, but it seems that they behave very similar to a CSS filter in that because they are shared all of the elements update</p>
<svg id="svg_filterAnimation" width="1000" height="280">
<defs>
<filter id="f1" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="4" />
<feGaussianBlur id="blur1" result="blurOut" in="matrixOut" stdDeviation="10" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>
<g transform="translate(120, 140)">
<circle class="fA_shadow" r="110"/>
<text dx="-1.5em">Circle 1</text>
</g>
<g transform="translate(420, 140)">
<circle class="fA_shadow" r="110"/>
<text dx="-1.5em">Circle 2</text>
</g>
<animate xlink:href="#blur1" attributeName="stdDeviation" from="10" to="30" dur="2s" begin="0s" repeatCount="indefinite"/>
</svg>
<h1>JavaScript Animations</h1>
<p>Animation via JavaScript is another approach, this uses D3 but the issue here is changing the size of gaussian blur that operates on the shadow is incredibly difficult as demonstrated in Circle 2</p>
<svg id="svg_javaScriptAnimation" width="1000" height="280">
<defs>
<filter id="f1" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="4" />
<feGaussianBlur id="blur1" result="blurOut" in="matrixOut" stdDeviation="10" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
<filter id="f2" x="-40%" y="-40%" height="200%" width="200%">
<feOffset result="offOut" in="SourceAlpha" dx="0" dy="4" />
<feGaussianBlur id="blur1" result="blurOut" in="matrixOut" stdDeviation="30" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>
<g transform="translate(120, 140)">
<circle class="jA_shadow" r="110"/>
<circle class="circle" r="110"/>
<text dx="-1.5em">Circle 1</text>
</g>
<g transform="translate(420, 140)">
<circle class="jA_shadow_expanding" r="110"/>
<circle class="circle" r="110"/>
<text dx="-1.5em">Circle 2</text>
</g>
<g transform="translate(720, 140)">
<circle class="jA_shadow_large" r="80"/>
<circle class="circle" r="110"/>
<text dx="-1.5em">Circle 3</text>
</g>
<animate xlink:href="#blur1" attributeName="stdDeviation" from="10" to="30" dur="2s" begin="0s" repeatCount="indefinite"/>
</svg>
【问题讨论】:
标签: html css svg material-design svg-filters