我在SMIL的帮助下制作SVG动画。除了我想为animatemotion标签添加“缓出”效果之外，所有这些都在chrome中按预期工作。现在，飞机以线性方式沿着路径移动。我想要的是动画在结尾处有一个缓慢停止，就像CSS3缓出效果一样。
这是SVG代码。
<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<svg xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0px"
y="0px"
viewBox="0 0 500 700">
<style type="text/css">
.st0{fill:none;stroke:#000000;stroke-miterlimit:10;}
</style>
<animateMotion
id="1"
xlink:href="#plane"
dur="2s"
path="M50,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31"
fill="freeze"
/>
<g>
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c3.9,0,7.8,0,11.7,0c0.1-0.2,0.3-0.4,0.4-0.6c0,0,0.1,0,0.1,0c0.1-0.3,0.2-0.6,0.3-0.8C116.3,590.6,115.5,588.1,113.2,586.8z"/>
<g id="plane" transform="scale(0.5) translate(-263.9, -167.6)">
<g>
<animateTransform attributeName="transform"
attributeType="XML"
type="rotate"
from="0 343.9 167.6"
to="-360 343.9 167.6"
dur="2s"
calcMode="spline"
keySplines="0.6 0.3 0.4 0.335"
keyTimes="0;1"
/>
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</g>
</g>
<path d="M56.6,331.6c-3.4,0.1-6.1-2.5-5.2-5.4c1.1-3.9,2.9-7.6,4.7-11.2c1.1-2,4-2.3,6-1.2c2.1,1.2,3,3.7,2.1,6
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<path d="M141.2,322.7c0,2.3-1.4,4.2-3.4,4.8c-2,0.6-4.2-0.1-5.4-1.9c-1.8-2.8-3.5-5.6-5.2-8.4c-1.2-2.1-0.8-4.6,1-6.1
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<path d="M236.3,324.9c0.9-1.2,1.5-2.8,2.6-3.7c2.7-1.9,5.7-3.6,8.6-5.2c2.3-1.3,5-0.4,6.4,1.8c1.3,2.2,0.8,5-1.4,6.5
c-2.9,1.9-5.8,3.7-8.8,5.2C240.5,331.1,236.8,328.7,236.3,324.9z"/>
<path d="M130.7,543.1c3.2,0,5.6,2.9,4.7,6.1c-1,3.3-2.1,6.5-3.4,9.7c-1,2.5-3.7,3.5-6.1,2.6c-2.4-0.9-3.7-3.4-2.9-6
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<path d="M96.3,301.1c-1.6,0.2-3.4,0.4-5.2,0.6c-2.9,0.4-5.2-1.2-5.7-3.9c-0.5-2.6,1.1-5.2,4-5.6c3.4-0.4,6.9-0.7,10.4-0.6
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<path d="M202.1,355.8c-2.4,0-4.3-1.3-5-3.1c-0.7-1.9-0.2-4.2,1.4-5.4c2.8-2.1,5.7-4,8.7-5.9c2.1-1.3,4.7-0.6,6.2,1.4
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<path d="M80.5,365c0,3.8-3.5,6.3-6.5,4.9c-3.3-1.6-6.5-3.6-9.5-5.7c-2.1-1.5-2.3-4.3-0.9-6.4c1.5-2.1,4.2-2.7,6.5-1.4
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<path d="M153.8,370.5c0.8-2.7,2.6-4.1,5.3-4.7c2.3-0.5,4.5-1.5,6.8-2.2c2.9-1,5.6,0.2,6.5,2.8c0.9,2.7-0.3,5.2-3.2,6.3
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<path d="M140.4,515.8c-3,0-5.2-2.6-4.7-5.6c0.5-3.3,1.2-6.5,1.9-9.7c0.5-2.5,2.9-4,5.3-3.7c2.5,0.4,4.5,2.7,4.1,5.2
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<path d="M153.9,370.4c-0.9,0.8-1.7,1.9-2.7,2.4c-2.8,1.4-6.1-0.3-6.7-3.4c-0.6-3.3-1.1-6.6-1.5-10c-0.3-2.5,1.5-4.7,3.9-5.2
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<path d="M143.1,463c0.3-2.9,0.6-6.1,1.1-9.4c0.4-2.7,2.8-4.4,5.4-4.1c2.5,0.3,4.4,2.7,4.2,5.3c-0.3,3.2-0.7,6.3-1.1,9.4
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<path d="M118,381.4c-2-0.2-4.1-0.3-6.1-0.6c-3.1-0.3-4.9-2.5-4.6-5.3c0.2-2.7,2.4-4.5,5.4-4.3c3,0.2,6.1,0.4,9.1,0.6
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<path d="M151.4,421L151.4,421c-2.7,0-4.9-2.2-4.9-4.9v-9.2c0-2.7,2.2-4.9,4.9-4.9h0c2.7,0,4.9,2.2,4.9,4.9v9.2
C156.2,418.8,154.1,421,151.4,421z"/>
</g>
<path class="st0" d="M104,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31"/>
答案 0 :(得分：2)
大多数问题作者的应用程序代码都以一堆香肠的形式绘制了一条飞机的路径。
通过应用stroke-dasharray和stroke-linecap = "round"
<svg xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0px"
y="0px"
width="100%" height="100%" viewBox="0 0 500 700">
<g id="path_G" transform="translate(100 -200)">
<path stroke="skyblue" stroke-width="10" stroke-dasharray="15 25" stroke-linecap="round" fill="none" d="M50,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31" />
<path id="path_GL" stroke="skyblue" stroke-width="1" fill="none" d="M50,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31" />
</g>
</svg>
我们将使用相同的动画，而不是animateMotion和animateTransform这两个动画
<animate
attributeName="startOffset"
dur="16s"
repeatCount="indefinite"
values="0%;120%"
calcMode="spline"
keySplines=" 0.185,0.675,0,0.995"/>
要使用bezier curve generator来制作CSS3 ease-out effect
<svg xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0px"
y="0px"
width="100%" height="100%" viewBox="0 0 500 700">
<g id="path_G" transform="translate(100 -250)">
<path stroke="skyblue" stroke-width="10" stroke-dasharray="15 25" stroke-linecap="round" fill="none" d="M50,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31" />
<path id="path_GL" stroke="skyblue" stroke-width="1" fill="none" d="M50,601c10.4-18.7,22.7-44.6,32-77c11.1-38.8,12.7-69,14-97c2.4-51.8-4.1-75.4-8-87c-6.4-19.3-12.4-36.4-29-43
c-15.1-6-36.6-2.4-49,13c-7.9,9.8-12.9,25.1-8,38c12.4,32.5,79.1,28.2,82,28c31.9-2.4,55.4-19.1,82-37c17.2-11.6,30.3-22.9,39-31" />
<text font-size="64" font-family="Times New Roman" fill="dodgerblue" >
<textPath id="result" xlink:href="#path_GL">
<tspan dx="0" > ✈ </tspan>
<animate
attributeName="startOffset"
dur="16s"
repeatCount="indefinite"
values="0%;120%"
calcMode="spline"
keySplines=" 0.185,0.675,0,0.995"/>
</textPath>
</text>
</g>
</svg>