- From: Frédéric Wang via GitHub <sysbot+gh@w3.org>
- Date: Fri, 10 Apr 2020 07:06:42 +0000
- To: public-css-archive@w3.org
> For a trivial example, the image of (0, 0, 0, 1) by M and -M are respectively (tx, 0, 0, 1) and (-tx, 0, 0, -1) which are the same point in homogeneous coordinates, but the former is rendered and the latter hidden? I forgot to say that for any nonzero λ and vector v, (λM)v = λ(Mv) represents the same point as Mv so λM actually represents the same transformation as M. This is why the decomposition algorithm starts by normalizing the matrix. With the current spec, the image (λM)(0, 0, 0, 1) is visible only if λ is positive. -- GitHub Notification of comment by fred-wang Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/912#issuecomment-611909972 using your GitHub account
Received on Friday, 10 April 2020 07:06:44 UTC