http://dev.w3.org/csswg/css3-3d-transforms/#backface-visibility-property doesn't have any formal definition of when the "back" of something is visible. For example, some obvious possible definitions would be: * if the element's transform involves projecting the vector [0 0 1] to a result with a negative Z component * if the element's cross product of the transform of [1 0 0] and the transform of [0 1 0] gives a result with a negative Z component These two give different results in some cases (I think when the transform matrix has a negative determinant). Matt Woodrow implemented the latter in Gecko in https://bugzilla.mozilla.org/show_bug.cgi?id=505115 ; I'm not sure if that was for compatibility with WebKit. -David -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla Corporation http://www.mozilla.com/ 𝄂Received on Wednesday, 27 July 2011 00:18:42 UTC
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