- From: Anthony Grasso <anthony.grasso@cisra.canon.com.au>
- Date: Wed, 15 Oct 2008 16:29:47 +1100
- To: "Dr. Olaf Hoffmann" <Dr.O.Hoffmann@gmx.de>
- CC: www-svg@w3.org
Hi Dr. Hoffmann, Dr. Olaf Hoffmann wrote: > Anthony Grasso: > >> Please let me know if you still have problems viewing it. >> > > Hello, > > this works, maybe because Opera has no problems with > it, it may occur not only with animation or zooming > (I think, typically zooming can be excluded, because this > is only a scaling with a positive factor and for this an > inverse always exists), my suggestion would be to write > something like this (This way I think, it is easier to provide > a simple method for authors, how to analyse the problem): > > "Note that the inverse of the CTM may not always exist. > This may cause problems for a user-agent, if the constrained > transformation is realised using the inverse of the CTM. > Authors are encouraged to verify that the resultant CTM is always > invertable to avoid unexpected results. Mathematically it is invertable, > if the determinant of the CTM is defined and not zero, graphically > this is the case, if a two-dimensional shape remains two-dimensionally > before the effect of a constrained transformation is applied." > The SVG Working Group looked again at this issue and we decided to use the above wording you proposed. "The TransformRef value" section [1] of specification contains the updated wording. Assuming you are satisfied by the new wording, I will close the issue. Please let us know if this does not satisfy your initial comment and I will reopen the issue. Kind Regards, Anthony Grasso [1] http://dev.w3.org/SVG/profiles/1.2T/master/coords.html#transform-ref
Received on Wednesday, 15 October 2008 05:30:33 UTC