+shawnsingh On Tue, Feb 12, 2013 at 9:22 AM, Marcin Szamotulski <msza...@gmail.com>wrote:
> Dear WebKit-Dev, > > I found an interesting difference between implementation of css 3d > transforms in Gecko (FireFox) and Chromium (WebKit). In Gecko, the > following css rule: > > tranform: perspective(500px) rotateY(90) > > rotates an element (let say an image) so that it is perpendicular to the > viewer, i.e. it shows the side of the element - hence nothing is printed > to the screen, since html elements have no depth. While in WebKit based > browsers (I have tested this in both Chromium and surf from suckles.org) > the elements is shown at an angle: both rotations (Gecko & WebKit) have > the same axis (the vertical screen directions). Testing different > angles I have found that I need to use rotateY(107deg), but this might > depend on the perspective. The reason for this is that WebKit and > Gecko are computing 3d view in a different way. The additional minor > difference is that rotateY(30deg) in Gecko turns an element 30deg to the > right while in WebKit it rotates to the left (with a different 3d view). > The reason I found it is because I try to make an animation which turns > a picture around 180deg showing a new picture on the other side, and > I wanted to change the picture in the middle (90deg). This works for > Gecko but for WebKit I need to know how to compute the angle at which > the element (image) is perpendicular to the view source (showing its > side to the viewer). Can somebody point me how the 3d rotationY with > a given perspective is calculated so I can make the necessary > converstion. > > Best regards, > Marcin Szamotulski > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev >
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