http://www.w3.org/Bugs/Public/show_bug.cgi?id=12089 Aryeh Gregor <Simetrical+w3cbug@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |Simetrical+w3cbug@gmail.com --- Comment #2 from Aryeh Gregor <Simetrical+w3cbug@gmail.com> 2011-02-16 00:49:11 UTC --- Rotation and scaling are not commutative. E.g., [ 0 -1 ] [ 2 0 ] = [ 0 -1 ] [ 1 0 ] [ 0 1 ] = [ 2 0 ], but [ 2 0 ] [ 0 -1 ] = [ 0 -2 ] [ 0 1 ] [ 1 0 ] = [ 1 0 ], which is different. One of those matrices is a rotation matrix, and the other is a "scaling" matrix (meaning diagonal for our purposes, I guess). In the particular example given, take a rectangle twice as wide as it is tall. Do a quarter turn, so now it's twice as tall as it is wide. Double the width, and it's square. The spec is correct. -- Configure bugmail: http://www.w3.org/Bugs/Public/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug.Received on Wednesday, 16 February 2011 00:49:13 UTC
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