- From: Dirk Schulze <dschulze@adobe.com>
- Date: Thu, 7 Mar 2013 20:57:02 -0800
- To: Nikos Andronikos <nikos.andronikos@cisra.canon.com.au>
- CC: "public-fx@w3.org" <public-fx@w3.org>
On Mar 7, 2013, at 8:06 PM, Nikos Andronikos <nikos.andronikos@cisra.canon.com.au> wrote: > Hi Dirk, > > I was having a look at the Matrix spec [1] and I believe the definitions for pre-multiply and post-multiply are backwards. > > >From [1]: > postmultiply > Term B postmultiplied by term A is equal to A · B. > From wikipedia [2]: > post-multiply (or right multiply) A by C" means AC > > Using B and A, as in your text this would give > post-multiply (or right multiply) B by A" means BA > > And likewise for pre-multiply. > Could you check please? One does not simply define the order of pre/post-multiplication. Fixed. Thanks! Dirk > > Cheers, > Nikos > > 1: https://dvcs.w3.org/hg/FXTF/raw-file/tip/matrix/index.html > 2: http://en.wikipedia.org/wiki/Matrix_multiplication > The information contained in this email message and any attachments may be confidential and may also be the subject to legal professional privilege. If you are not the intended recipient, any use, interference with, disclosure or copying of this material is unauthorised and prohibited. If you have received this email in error, please immediately advise the sender by return email and delete the information from your system.
Received on Friday, 8 March 2013 04:57:30 UTC