CSS3中动画TRANSFORM必须要了解的SKEW变化原理_html/css_WEB-ITnose
transform是CSS3中比较安全的动画(对于性能来说),其中有一些动画属性,来执行不同的变化.今天我们来了解skew的变化原理.
skew,其实使用的频率不是很高,当然也没有最低.但是往往,一直都不知道他的变化规则.所以使用起来有点摸不着头脑.动画上的使用,也就没那么优先考虑.
skew有两个属性: skewX,skewY.其实变化也就针对这两个值来操作.
首先我们来看,最基本的skew术语.
图中这个方形是一个BOX,skew的默认原点是盒子的中心点(0,0)横向为Y轴,纵向为X轴,这跟我们以往接触到的坐标轴,刚好是相反的.这个图应该很好理解.
下面我们来做一个skewX(10deg)的变化.
铅笔盒子,为原盒子.红色的盒子为变换后的盒子.从坐标轴X轴来看,首先将原X轴旋转10个度数,得到红色的X坐标轴,然后根据红色X坐标轴,做盒子的基本变换.这是最进本几何变换了.我们就不深入了,自己可以动手画画图纸,我就喜欢在图纸上理解.
下面继续完成skewY(10deg)的变化.
这里和上面的BOX是一样的,变化的是针对Y轴了.最后得出的是红色BOX.
我附上最后的图纸:
画得不好,O(∩_∩)O~!如果需要自己试更大的度数,自己尝试用笔在纸上画一下,这样印象更深.
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