无法沿 Inkscape 中生成的路径设置 SVG 动画
Cannot animate SVG along path produced in Inkscape
我在 Inkscape 中生成了以下 SVG，它有一个吃豆人图形 (id=pacman) 和一条路径 (id=trajectory)。 objective是让图形沿着路径移动。
将图像保存到文件后，我通过在 Pacman-figure 中添加以下部分来编辑它：
<animateMotion
path="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
路径坐标是从 trajectory 对象复制的。结果，我得到了这个文件：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
width="165.06496mm"
height="104.70296mm"
viewBox="0 0 165.06496 104.70296"
version="1.1"
id="svg8"
inkscape:version="0.92.3 (2405546, 2018-03-11)"
sodipodi:docname="clean-animation.svg">
<defs
id="defs2" />
<sodipodi:namedview
id="base"
pagecolor="#ffffff"
bordercolor="#666666"
borderopacity="1.0"
inkscape:pageopacity="0.0"
inkscape:pageshadow="2"
inkscape:zoom="1.4"
inkscape:cx="343.91864"
inkscape:cy="205.09936"
inkscape:document-units="mm"
inkscape:current-layer="layer1"
showgrid="false"
fit-margin-top="0"
fit-margin-left="0"
fit-margin-right="0"
fit-margin-bottom="0"
inkscape:window-width="1920"
inkscape:window-height="1005"
inkscape:window-x="-9"
inkscape:window-y="1071"
inkscape:window-maximized="1" />
<metadata
id="metadata5">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title />
</cc:Work>
</rdf:RDF>
</metadata>
<g
inkscape:label="Layer 1"
inkscape:groupmode="layer"
id="layer1"
transform="translate(-19.575883,-23.159755)">
<path
style="opacity:0.597;fill:#ffff00;fill-opacity:1;stroke:#008000;stroke-width:0.26458332;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:0.26458331, 0.52916662999999997;stroke-dashoffset:0;stroke-opacity:0.8"
id="pacman"
sodipodi:type="arc"
sodipodi:cx="33.408691"
sodipodi:cy="115.25672"
sodipodi:rx="13.698855"
sodipodi:ry="12.473214"
sodipodi:start="0"
sodipodi:end="5.9207142"
d="m 47.107547,115.25672 a 13.698855,12.473214 0 0 1 -12.459194,12.42204 13.698855,12.473214 0 0 1 -14.714154,-10.1738 13.698855,12.473214 0 0 1 9.796115,-14.26337 13.698855,12.473214 0 0 1 16.487129,7.59231 l -12.808752,4.42282 z"
inkscape:label="#path815">
<animateMotion
path="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
</path>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
id="trajectory"
inkscape:connector-curvature="0"
sodipodi:nodetypes="csc"
inkscape:label="#path817" />
</g>
</svg>
问题是动画不工作。 2 秒后，根据 begin="2s" 的定义，黄色数字消失了。
我的第一个猜测是坐标以某种方式偏移，并且 Pacman 形状在外部 space 的某处动画。但是，如果是这种情况，那么我会在每个周期开始时看到形状恢复片刻。
当我尝试使用在各种教程中找到的手写 SVG 时 - 它们有效。但是，我自己在 Inkscape 中制作的效果并不像预期的那样。
这是什么原因，如何纠正？
为了了解发生了什么，请将 overflow:visible 添加到 svg 元素。你会看到 packman 正在远离路径
在下一个例子中，我将把你的 packman 换成一个圆圈。圆 的路径以点 {x:0,y:0} 为中心 您应该重写 packman 的路径，使其从 svg 元素的原点开始。
svg{border:1px solid;}
<svg width="165.06496mm"
height="104.70296mm"
viewBox="0 0 165.06496 104.70296"
id="svg8">
<g id="layer1" >
<path
style="opacity:0.597;fill:#ffff00;fill-opacity:1;stroke:#008000;stroke-width:0.26458332;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:0.26458331, 0.52916662999999997;stroke-dashoffset:0;stroke-opacity:0.8"
id="pacman"
d="M-12.5,0A12.5 12.5 0 0 1 12.5,0A12.5 12.5 0 0 1 -12.5,0">
<animateMotion
path="m20.07, 90.96 c24.798, 0.794 33.021, -32.601 61.073, -32.543 c27.558, 0.058 37.283, -38.722 63.920, -39.288 1 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
</path>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="m20.07, 90.96 c24.798, 0.794 33.021, -32.601 61.073, -32.543 c27.558, 0.058 37.283, -38.722 63.920, -39.288 "
id="trajectory" />
</g>
</svg>
我在 Inkscape 中生成了以下 SVG，它有一个吃豆人图形 (id=pacman) 和一条路径 (id=trajectory)。 objective是让图形沿着路径移动。
将图像保存到文件后，我通过在 Pacman-figure 中添加以下部分来编辑它：
<animateMotion
path="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
路径坐标是从 trajectory 对象复制的。结果，我得到了这个文件：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
width="165.06496mm"
height="104.70296mm"
viewBox="0 0 165.06496 104.70296"
version="1.1"
id="svg8"
inkscape:version="0.92.3 (2405546, 2018-03-11)"
sodipodi:docname="clean-animation.svg">
<defs
id="defs2" />
<sodipodi:namedview
id="base"
pagecolor="#ffffff"
bordercolor="#666666"
borderopacity="1.0"
inkscape:pageopacity="0.0"
inkscape:pageshadow="2"
inkscape:zoom="1.4"
inkscape:cx="343.91864"
inkscape:cy="205.09936"
inkscape:document-units="mm"
inkscape:current-layer="layer1"
showgrid="false"
fit-margin-top="0"
fit-margin-left="0"
fit-margin-right="0"
fit-margin-bottom="0"
inkscape:window-width="1920"
inkscape:window-height="1005"
inkscape:window-x="-9"
inkscape:window-y="1071"
inkscape:window-maximized="1" />
<metadata
id="metadata5">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title />
</cc:Work>
</rdf:RDF>
</metadata>
<g
inkscape:label="Layer 1"
inkscape:groupmode="layer"
id="layer1"
transform="translate(-19.575883,-23.159755)">
<path
style="opacity:0.597;fill:#ffff00;fill-opacity:1;stroke:#008000;stroke-width:0.26458332;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:0.26458331, 0.52916662999999997;stroke-dashoffset:0;stroke-opacity:0.8"
id="pacman"
sodipodi:type="arc"
sodipodi:cx="33.408691"
sodipodi:cy="115.25672"
sodipodi:rx="13.698855"
sodipodi:ry="12.473214"
sodipodi:start="0"
sodipodi:end="5.9207142"
d="m 47.107547,115.25672 a 13.698855,12.473214 0 0 1 -12.459194,12.42204 13.698855,12.473214 0 0 1 -14.714154,-10.1738 13.698855,12.473214 0 0 1 9.796115,-14.26337 13.698855,12.473214 0 0 1 16.487129,7.59231 l -12.808752,4.42282 z"
inkscape:label="#path815">
<animateMotion
path="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
</path>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="m 39.645298,114.12279 c 24.797657,0.79422 33.02086,-32.601373 61.073142,-32.542731 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
id="trajectory"
inkscape:connector-curvature="0"
sodipodi:nodetypes="csc"
inkscape:label="#path817" />
</g>
</svg>
问题是动画不工作。 2 秒后，根据 begin="2s" 的定义，黄色数字消失了。
我的第一个猜测是坐标以某种方式偏移，并且 Pacman 形状在外部 space 的某处动画。但是，如果是这种情况，那么我会在每个周期开始时看到形状恢复片刻。
当我尝试使用在各种教程中找到的手写 SVG 时 - 它们有效。但是，我自己在 Inkscape 中制作的效果并不像预期的那样。
这是什么原因，如何纠正？
为了了解发生了什么，请将 overflow:visible 添加到 svg 元素。你会看到 packman 正在远离路径
在下一个例子中，我将把你的 packman 换成一个圆圈。圆 的路径以点 {x:0,y:0} 为中心 您应该重写 packman 的路径，使其从 svg 元素的原点开始。
svg{border:1px solid;}
<svg width="165.06496mm"
height="104.70296mm"
viewBox="0 0 165.06496 104.70296"
id="svg8">
<g id="layer1" >
<path
style="opacity:0.597;fill:#ffff00;fill-opacity:1;stroke:#008000;stroke-width:0.26458332;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:0.26458331, 0.52916662999999997;stroke-dashoffset:0;stroke-opacity:0.8"
id="pacman"
d="M-12.5,0A12.5 12.5 0 0 1 12.5,0A12.5 12.5 0 0 1 -12.5,0">
<animateMotion
path="m20.07, 90.96 c24.798, 0.794 33.021, -32.601 61.073, -32.543 c27.558, 0.058 37.283, -38.722 63.920, -39.288 1 27.55775,0.05761 37.28264,-38.721653 63.91959,-39.287919"
begin="2s"
dur="10s"
repeatCount="indefinite"
rotate="auto" />
</path>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="m20.07, 90.96 c24.798, 0.794 33.021, -32.601 61.073, -32.543 c27.558, 0.058 37.283, -38.722 63.920, -39.288 "
id="trajectory" />
</g>
</svg>