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SVG 動畫二三事
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Patrick Wang
January 09, 2015
Programming
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SVG 動畫二三事
Patrick Wang
January 09, 2015
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Transcript
SVG 動畫⼆二三事 patw / Front-End Engineer Gogolook Developers meet up
╳
SVG • Scalable Vector Graphics • Proposed by W3C in
1999. In 2001 the SVG gained its first official release. • XML • Vector vs Bitmap
SVG • Scalable • Smaller sizes (can be gzipped) •
Interactive & Styleable (CSS & JavaScript)
None
None
TOOLS • Inkscape (http://inkscape.org/) • SVG-edit (http://svg-edit.googlecode.com/svn/ branches/stable/editor/svg-editor.html) • Adobe
Illustrator • Sketch
SVG ANIMATIONS
ANIMATED SVG VS. GIFS “By using animated SVGs instead of
GIFs we were able to reduce our page size from 1.6 mb to 389 kb, and reduce our page load time from 8.75 s to 412 ms. That’s a huge difference.” http://oak.is/thinking/animated-svgs/
SVG ANIMATIONS • 更多變化:⽐比起 CSS 3 transition,除了位移、 顏⾊色變化之外,還⽀支援路徑描繪、導引線、形 狀漸變等動畫... •
互動效果:點擊後播放、等待 A 結束若干秒後 播放,或是針對單⼀一元件互動...
SVG ANIMATIONS • 三種實現⽅方法 • CSS • SMIL(Synchronized Multimedia Integration
Language) • JavaScript http://css-tricks.com/video-screencasts/135-three-ways-animate-svg/
SVG ANIMATIONS • CSS 使⽤用時機 • 只要實現簡單的動畫效果 • 只需 CSS
動畫可⽀支援的屬性就可完成的情況 • 了解 CSS 動畫怎麼做
SVG ANIMATIONS • SMIL 使⽤用時機 • 那些 CSS 辦不到的動畫屬性(例如形變) •
要⽤用上 SMIL 的特殊效果,例如在 A 動畫結束 後播放(不需像 CSS 動畫要⾃自⾏行調整延遲時 間),或是點擊後播放之類的
SMIL ANIMATIONS • 不⽤用 CSS、JavaScript 就可實現動畫效果! • 瀏覽器⽀支援度 (http://caniuse.com/#feat=svg- smil)
SMIL ANIMATIONS • <set> • <animate> • <animateColor> • <animateTransform>
• <animateMotion> http://tutorials.jenkov.com/svg/svg-animation.html
SVG ANIMATIONS • JavaScript 使⽤用時機 • 就是要⽤用 JavaScript 的情況,像是動畫可能是 依據接收到的
JSON 來動作的 • 或是需要⼀一些數學邏輯時 • 解決跨瀏覽器的問題 • 需要實現龐⼤大且複雜的動畫 • 太複雜也許就⽤用 Canvas 了
SVG ANIMATIONS • JavaScript Solutions • Snap.svg (http://snapsvg.io/) • GreenSock
(http://codepen.io/GreenSock/pen/ gpDrC) • Velocity.js (http://julian.com/research/velocity/) • SVG Morpheus (http://alexk111.github.io/ SVG-Morpheus/)
DEMO
REFERENCES • http://slides.com/sarasoueidan/animating-svg-with-css- and-smil-full-version • http://css-tricks.com/video-screencasts/135-three- ways-animate-svg/ • http://www.oxxostudio.tw/articles/201409/svg-21-smil- animation.html
• http://tech.mozilla.com.tw/posts/5660/ • http://www.zhangxinxu.com/wordpress/2014/08/so- powerful-svg-smil-animation/