我希望使用类似this的渐进线来创建类似here的树的绘图效果。我希望仅css3
使用svg/canvas
和js
。你有什么想法吗?
更多信息:
我试图将一棵树切成碎片并逐个制作动画,但它不是草书,因为它有很多关于同步延迟和持续时间的细节,因为每件都有不同的长度等等。所有这些都是在没有svg的情况下完成的。我想现在,如果我可以设置线路的动画。
答案 0 :(得分:1)
是的,请使用CSS 3查看this rendering of the Bahamas Logo
它描述了他的过程和技巧。您也可以查看来源。
可以找到更多here
<强>更新强>
也许这个Sencha Animator product可能有帮助吗?
答案 1 :(得分:1)
您可以使用普通SVG执行此操作。 SVG为声明性动画提供<animate>
元素。
你想要的东西(据我所知)是一条看起来好像是在观众面前画出的线条。您可以使用stroke-dasharray
属性来实现此目的。此属性使用一系列定义破折号和间隙长度的值来定义破折号模式。策略是:首先我们有一个长度为0的短划线和一个至少与整个路径一样长的间隙。这意味着我们什么都看不到(或者只是路径开头的第一个点)。最后,我们想要一个至少是路径全长的破折号。我们希望破折号逐渐变长和变长,直到达到最终长度(完整路径的长度)。
最简单的情况是:
<svg xmlns="http://www.w3.org/2000/svg" width="400px" height="300px">
<!-- This is the path of a spiral -->
<path d="m 7.1428565,220.9336 c 0,0 13.6660115,54.75386 218.5714335,51.42857 C 430.61971,269.03688 478.47682,99.194335 206.69537,110.78149 -65.086093,122.36866 45.497658,213.22607 210.28635,207.29759 375.07503,201.3691 429.75297,97.468925 207.14285,82.362175 -15.467268,67.255425 64.868608,160.66909 210,153.79075 c 145.13139,-6.87834 137.69998,-93.087405 11.42857,-99.999995 -126.271412,-6.9126 -150.382292,28.03248 -24.28571,35.71428 126.09659,7.6818 72.6601,-44.83727 -5.71429,-84.2857095"
stroke-width="10" stroke-linecap="round" fill="none" stroke="black" stroke-dasharray="0,2305">
<!-- This defines the animation:
The path is roughly 2305 units long, it will be drawn in 5 seconds -->
<animate from="0,2305" to="2305,0" dur="5s"
attributeName="stroke-dasharray" repeatCount="indefinite"/>
</path>
</svg>
使用多个值(使用values
属性)而不是一个from
和一个to
值,可以完成更复杂的事情:
<svg xmlns="http://www.w3.org/2000/svg" width="400px" height="300px">
<path d="m 7.1428565,220.9336 c 0,0 13.6660115,54.75386 218.5714335,51.42857 C 430.61971,269.03688 478.47682,99.194335 206.69537,110.78149 -65.086093,122.36866 45.497658,213.22607 210.28635,207.29759 375.07503,201.3691 429.75297,97.468925 207.14285,82.362175 -15.467268,67.255425 64.868608,160.66909 210,153.79075 c 145.13139,-6.87834 137.69998,-93.087405 11.42857,-99.999995 -126.271412,-6.9126 -150.382292,28.03248 -24.28571,35.71428 126.09659,7.6818 72.6601,-44.83727 -5.71429,-84.2857095"
stroke-width="10" stroke-linecap="round" fill="none" stroke="black" stroke-dasharray="0,2305">
<animate attributeName="stroke-dasharray" dur="5s" repeatCount="indefinite"
values="0,2305;
2000,305;
2305,0"/>
</path>
</svg>
您可以使用values
属性指定精确时间(将在keyTimes
中列出的值):
<svg xmlns="http://www.w3.org/2000/svg" width="400px" height="300px">
<path d="m 7.1428565,220.9336 c 0,0 13.6660115,54.75386 218.5714335,51.42857 C 430.61971,269.03688 478.47682,99.194335 206.69537,110.78149 -65.086093,122.36866 45.497658,213.22607 210.28635,207.29759 375.07503,201.3691 429.75297,97.468925 207.14285,82.362175 -15.467268,67.255425 64.868608,160.66909 210,153.79075 c 145.13139,-6.87834 137.69998,-93.087405 11.42857,-99.999995 -126.271412,-6.9126 -150.382292,28.03248 -24.28571,35.71428 126.09659,7.6818 72.6601,-44.83727 -5.71429,-84.2857095"
stroke-width="10" stroke-linecap="round" fill="none" stroke="black" stroke-dasharray="0,2305">
<animate attributeName="stroke-dasharray" dur="5s" repeatCount="indefinite"
values="0,2305;
2000,305;
2305,0"
keyTimes="0;.9;1"/>
</path>
</svg>
使用CSS3可以完成类似的事情:
<svg xmlns="http://www.w3.org/2000/svg" width="400px" height="300px">
<style type="text/css">
path {
animation-name:animateDash;
animation-duration:5s;
animation-iteration-count:infinite;
}
@keyframes animateDash {
from{stroke-dasharray:0,2305}
to {stroke-dasharray:2305,0}
}
</style>
<path d="m 7.1428565,220.9336 c 0,0 13.6660115,54.75386 218.5714335,51.42857 C 430.61971,269.03688 478.47682,99.194335 206.69537,110.78149 -65.086093,122.36866 45.497658,213.22607 210.28635,207.29759 375.07503,201.3691 429.75297,97.468925 207.14285,82.362175 -15.467268,67.255425 64.868608,160.66909 210,153.79075 c 145.13139,-6.87834 137.69998,-93.087405 11.42857,-99.999995 -126.271412,-6.9126 -150.382292,28.03248 -24.28571,35.71428 126.09659,7.6818 72.6601,-44.83727 -5.71429,-84.2857095"
stroke-width="10" stroke-linecap="round" fill="none" stroke="black" stroke-dasharray="0,2305"/>
</svg>
自己决定使用哪种方法。