- From: Dirk Schulze <dschulze@adobe.com>
- Date: Sun, 14 Sep 2014 07:04:18 +0000
- To: Simon Eugster <simon.eu@gmail.com>
- CC: "www-svg@w3.org" <www-svg@w3.org>
On Sep 11, 2014, at 11:49 AM, Simon Eugster <simon.eu@gmail.com> wrote: > Dear list, > > we are currently discussing coordinate systems of getTransformToElement and co. since Firefox implements them in a different way as the other browsers do. > > The basic question is, in this example, > <svg id="root"> > <svg id="inner" x="1" y="0"><rect id="r" x="1" y="0"/></svg> > </svg> > > what is the user coordinate system on the current element supposed to be? Should inner.getTransformToElement(root) return an identity matrix, because there is no 'transform' attribute on "inner", or should it return a translation matrix by (1,0) because, according to section 7.9, "inner"s user coordinate system has its origin there? Or, again (0,0) because the new user coordinate system only affects the children of "inner" like "r”? The spec says that getTransformToElement returns the transformations from one coordinate space to another. In you case, x and y do not contribute to modifications to the coordinate space. Therefore, SVGMatrix should be the identity transform. In face, in your example, for all elements getTransformToElement would return the identity transform. Greetings, Dirk > > The full thread on Mozilla's bug tracker, including some demos, is here: https://bugzilla.mozilla.org/show_bug.cgi?id=1064151 > > Greetings, > Simon
Received on Sunday, 14 September 2014 07:04:50 UTC