- From: Tavmjong Bah <tav.w3c@gmail.com>
- Date: Thu, 16 Apr 2015 09:52:45 +0200
- To: Erik Dahlström <ed@opera.com>
- Cc: "public-fx@w3.org" <public-fx@w3.org>, "www-svg@w3.org" <www-svg@w3.org>
On Thu, 2015-04-16 at 09:33 +0200, Erik Dahlström wrote: > Hi, > > forwarding on behalf of Eric Willigers, who found some inconsistencies in > how the starting point and direction works in the motion path draft > compared to svg2. In the definition of the motion-path[1] property the > starting point and direction for circle and ellipse are different to the > ones used for the equivalent paths in svg2, see [2][3]. In svg the > equivalent path for circle and ellipse starts at 3 o'clock and proceeds > clockwise. The definition of starting point is in SVG 1.1. The direction is a bit ambiguous but seems to indicate a clock-wise direction. All the browsers I and Amelia tested follow this convention.[4][5] SVG 2 adds that the decomposition of a circle/ellipse is four arcs (for the purpose of marker placement) and makes clear the clock-wise direction. > Is this going to be a possible cause of confusion, and should these > definitions be aligned? > > > [1] http://dev.w3.org/fxtf/motion-1/#motion-path-property > [2] https://svgwg.org/svg2-draft/shapes.html#CircleElement > [3] https://svgwg.org/svg2-draft/shapes.html#EllipseElement > [4] https://lists.w3.org/Archives/Public/public-svg-wg/2015AprJun/0006.html [5] https://lists.w3.org/Archives/Public/public-svg-wg/2015AprJun/0007.html
Received on Thursday, 16 April 2015 07:53:19 UTC