css3 转换 matrix3d 值 [英] css3 converting matrix3d values

问题描述

我想知道如何获取 matrix3d 的 rotateX 和 rotateY 值，例如:

I want to know how to get the rotateX and rotateY values of a matrix3d such as this:

matrix3d(0.9999999970415847, 0, 0.00007692093651178932, 0, 0, 1, 0, 0, -0.00007692093651178932, 0, 0.9999999970415847, 0, 0, 0, 300, 1)

有人知道怎么做吗?我真的很感激你的帮助，特别是因为我不是真正的数学类型的人.谢谢！

does anybody know how to this ? I would really appreciate the help especially since I am not really the math type of person. thnx!

推荐答案

我也不擅长数学，所以这需要比我更了解的人检查一下:

I'm not good at math either, so this needs some checking by someone with more knowledge than me:

var matrix = new WebKitCSSMatrix(el.style.webkitTransform);
var rotationX = Math.acos(matrix.a) * (180/pi);
var rotationY = Math.asin(matrix.b) * (180/pi);

您可以在此处查看演示:

You can view a demo here:

http://jsfiddle.net/YsCF5/

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