问题描述
我正在 SVG 中制作动画雪花图案，它在 Chrome/ium 中效果很好，但在 Firefox 中，当您将鼠标移入和移出图案区域时，该图案只会偶尔进行微小的移动，否则不会'移动。
潜在的问题似乎是与 this question 中相同的 firefox 错误，其中 <use> 元素的动画不起作用。我的另一个问题是，我通过分别更改 <path> 和 x 位置来为 y 元素的位置设置动画以避免明显的循环运动，并且因为 <path> 元素不会'没有我需要在 <use> 元素中引用它们的那些属性。
我希望我错过了一些完全明显的解决方案，其中 <path> 被嵌入到其他具有 x 和 y 属性的元素中，我可以设置动画并避免<use> 的使用。
<svg xmlns="http://www.w3.org/2000/svg" width="800px" height="150px">
<defs>
<!-- two identical sNow-flake paths but slightly different scaling and rotation -->
<!-- Could be two uses of the same path but the firefox animation bug is from use so that's probably not what we want -->
<path
id="sNow-flake-1"
fill="#fff" stroke="none"
d="M183.3125,43.09375 L183.3125,83.8125 L152.71875,66.125 L137.1875,92.9375 L183.3125,119.65625 L183.3125,179.75 L131.5,149.8125 L131.40625,96.28125 L100.40625,96.34375 L100.46875,131.90625 L65.09375,111.46875 L49.59375,138.3125 L84.875,158.6875 L54.25,176.3125 L69.6875,203.1875 L115.90625,176.59375 L167.90625,206.625 L116.09375,236.53125 L69.6875,209.84375 L54.25,236.71875 L85.0625,254.46875 L49.6875,274.875 L65.1875,301.71875 L100.46875,281.34375 L100.40625,316.6875 L131.40625,316.75 L131.5,263.4375 L183.5,233.4375 L183.5,293.25 L137.1875,320.09375 L152.71875,346.90625 L183.5,329.09375 L183.5,369.9375 L214.5,329.21875 L245.09375,346.90625 L260.625,320.09375 L214.5,293.375 L214.5,233.28125 L266.3125,263.21875 L266.40625,316.75 L297.40625,316.6875 L297.34375,281.125 L332.71875,301.5625 L348.21875,274.71875 L312.9375,254.34375 L343.5625,236.71875 L328.125,209.84375 L281.9375,236.4375 L229.90625,206.40625 L281.75,176.46875 L328.125,203.1875 L343.5625,176.3125 L312.75,158.5625 L348.125,138.15625 L332.625,111.3125 L297.34375,131.6875 L297.40625,96.34375 L266.40625,96.28125 L266.3125,149.59375 L214.3125,179.59375 L214.3125,119.78125 L260.625,92.9375 L245.09375,66.125 L214.3125,83.9375 L214.3125,43.09375 z"
transform="scale(0.02) rotate(-15) translate(-202 -202)">
</path>
<path id="sNow-flake-2"
fill="#fff" stroke="none"
d="M183.3125,43.09375 z"
transform="scale(0.027) rotate(15) translate(-202 -202)">
</path>
<!-- A couple of animated sNow flakes. Animate x and y separately to avoid obvIoUs cycles. -->
<!-- Pick dur values with large smallest common multiple to make a long cycle. -->
<pattern id="pt-sNow-3" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse">
<use x="5" y="5" href="#sNow-flake-1">
<animate attributeName="x" dur="4.2357s" repeatCount="indefinite" values="5; 5.7; 5; 3; 6.5; 5"/>
<animate attributeName="y" dur="3.9s" repeatCount="indefinite" values="5; 3; 5.7; 5; 6.5; 5"/>
</use>
<use x="15" y="15" href="#sNow-flake-2">
<animate attributeName="x" dur="5.0s" repeatCount="indefinite" values="15; 13; 16.5; 15; 15.7; 15"/>
<animate attributeName="y" dur="3.7357s" repeatCount="indefinite" values="15; 13; 16.5; 15; 15.7; 15"/>
</use>
</pattern>
</defs>
<g>
<rect x="0" width="800" y="0" height="150" fill="#bbb"/>
<rect x="0" width="800" y="0" height="150" fill="url(#pt-sNow-3)" stroke="#888"/>
</g>
</svg>解决方法
根据@PaulLeBeau 和@RobertLongson 的评论，我制作了一个版本，其中有两个 <animateTransform> 标签附加到 <g>，其中第二个带有 addititve="sum"。此 <g> 还包含要制作动画的 <path>。
这两个动画可以有不同的持续时间来制作一个很长的周期，并且都可以同时影响 x 和 y，使幻觉更加完整。
<svg xmlns="http://www.w3.org/2000/svg" width="500px" height="150px">
<defs>
<path
id="snow-flake"
fill=#fff stroke="none"
d="M183.3125,43.09375 L183.3125,83.8125 L152.71875,66.125 L137.1875,92.9375 L183.3125,119.65625 L183.3125,179.75 L131.5,149.8125 L131.40625,96.28125 L100.40625,96.34375 L100.46875,131.90625 L65.09375,111.46875 L49.59375,138.3125 L84.875,158.6875 L54.25,176.3125 L69.6875,203.1875 L115.90625,176.59375 L167.90625,206.625 L116.09375,236.53125 L69.6875,209.84375 L54.25,236.71875 L85.0625,254.46875 L49.6875,274.875 L65.1875,301.71875 L100.46875,281.34375 L100.40625,316.6875 L131.40625,316.75 L131.5,263.4375 L183.5,233.4375 L183.5,293.25 L137.1875,320.09375 L152.71875,346.90625 L183.5,329.09375 L183.5,369.9375 L214.5,329.21875 L245.09375,346.90625 L260.625,320.09375 L214.5,293.375 L214.5,233.28125 L266.3125,263.21875 L266.40625,316.75 L297.40625,316.6875 L297.34375,281.125 L332.71875,301.5625 L348.21875,274.71875 L312.9375,254.34375 L343.5625,236.71875 L328.125,209.84375 L281.9375,236.4375 L229.90625,206.40625 L281.75,176.46875 L328.125,203.1875 L343.5625,176.3125 L312.75,158.5625 L348.125,138.15625 L332.625,111.3125 L297.34375,131.6875 L297.40625,96.34375 L266.40625,96.28125 L266.3125,149.59375 L214.3125,179.59375 L214.3125,119.78125 L260.625,92.9375 L245.09375,66.125 L214.3125,83.9375 L214.3125,43.09375 z"
transform="translate(-202 -202)">
</path>
<!-- A couple of animated snow flakes. Each has two animation loops to avoid obvious cycles. -->
<!-- Pick dur values with large smallest common multiple to make a long cycle. -->
<pattern id="pt-snow-3" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse">
<g>
<use href="#snow-flake" transform="scale(0.02) rotate(-15)"/>
<animateTransform dur="5.000s" values="5,5; 5.7,4.7; 5.4,5; 3.7,5.2; 6.2,4.7; 5,5" attributeName="transform" type="translate" repeatCount="indefinite"/>
<animateTransform dur="4.789s" values="0,0; -1,3; -1,1; 0,-2; 2,-1; 0,0" additive="sum" attributeName="transform" type="translate" repeatCount="indefinite"/>
</g>
<g>
<use href="#snow-flake" transform="scale(0.027) rotate(15)"/>
<animateTransform dur="4.000s" values="15,14; 14.7,14; 15.2,14.1; 13,14; 15.5,14; 15,14" attributeName="transform" type="translate" repeatCount="indefinite"/>
<animateTransform dur="5.789s" values="0,0; 0,-2; -1,1; -1,1; 1,0" additive="sum" attributeName="transform" type="translate" repeatCount="indefinite"/>
</g>
</pattern>
</defs>
<g>
<rect x="0" width="500" y="0" height="150" fill="#bbb"/>
<rect x="0" width="500" y="0" height="150" fill="url(#pt-snow-3)" stroke="#888"/>
</g>
</svg>