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Transform
1.
Transform 动画 及其在 Timeline
中的应用
2.
概述 • 利用 CSS3
的 transform 属性,可以修改用户的 观察点,让页面元素达到旋转、拉伸、转换、变 形等效果,它包括 2d transform 以及 3d transform
3.
2D Transform • 2d
transform 提供基于 2D 平面的各种变换,其效果 类似于 PS 中按下 Ctrl+T 后图形的自由变换
4.
2D Transform • 浏览器兼容性
5.
2D Transform • transform-origin •
transform – translate, traslateX, translateY – scale, scaleX, scaleY – rotate – skew, skewX, skewY e.g. transform-origin: 50% 50%; transform: rotate(45deg);
6.
2D Transform • 在
Timeline 中的应用: • 浮动发表框在失焦后有个抖动效果,以提示用户 当前仅可以对发表框进行操作
7.
8.
3D Transform • 在
2D Transform 的基础上增加了 Z 轴,提供具 有 3D 效果的变换
9.
3D Transform • 浏览器兼容性
10.
3D Transform •
transform-origin • perspective-origin • backface-visibility • transform (new part) – translate3d, translateZ – scale3d, scaleZ – rotate3d, rotateX, rotateY, rotateZ – perspective
11.
3D Transform • 在
Timeine 中的应用,头像的 3D 旋转效果
12.
关于动画性能以及优化 •
桢数的选取 • 卡桢现象与优雅降级 • 浏览器的优化 requestAnimationFrame • 样式动画 CSS3 transition
13.
Reference • http://www.w3.org/TR/css3-2d-transforms/ • http://www.w3.org/TR/css3-3d-transforms/ •
http://ie.microsoft.com/testdrive/Graphics/hands-on-c