The Challenge of CSS 3D Transformation Angles

Currently, I am utilizing CSS3 for a transformation on a div with the following properties:

'-webkit-transform' : 'rotateX(45deg) rotateZ(-45deg)'

The outcome appears like this:

Alternatively, you can view it in action in this fiddle: http://jsfiddle.net/kteSW/

Observing the result, the angle measures 36 degrees, which is different from the expected 30 degrees (sin45*sin45). I am curious if anyone knows why this discrepancy exists. Could it be an intentional design choice or perhaps a CSS3 bug?


UPDATE:

I have already configured the settings to be:

-webkit-transform-style: preserve-3d;
-webkit-perspective: none;

With these parameters in place, the transformation should render in an orthogonal manner. However, the angle remains at 36 degrees instead of the desired 30 degrees.

Answer №1

Our goal is to determine the angle between the point of view and the Z axis as we gaze from (1, 1, 1) towards (0, 0, 0).

After calculation, the result is actually

(90 degrees) - arctan(1 / sqrt(2)) = 54.7356103 degrees
, not 45 degrees.

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