CSS perspective

hbghlyj

The perspective Property

perspective: 100px:

DIV1

DIV2

perspective: none:

DIV3

DIV4

hbghlyj

点 $(x,y,-100)$ 绕 $x$ 轴旋转 $θ$ 角度到 $(x,y\cos(θ)+100\sin(θ), y\sin(θ) - 100\cos(θ))$