- From: Boris Dalstein via GitHub <sysbot+gh@w3.org>
- Date: Tue, 10 Dec 2019 18:11:10 +0000
- To: public-svg-issues@w3.org
dalboris has just created a new issue for https://github.com/w3c/svgwg: == Incorrect sweep-flag in circle/ellipse equivalent path == The equivalent path of a circle (similar for ellipses) is currently defined as: https://svgwg.org/svg2-draft/shapes.html#CircleElement > The rx and ry parameters to the arc commands are both equal to the used value of the r property, after conversion to local user units, while the x-axis-rotation, the large-arc-flag, and the **sweep-flag are all set to zero**. The coordinates are computed as follows, where cx, cy, and r are the used values of the equivalent properties, converted to user units: ``` A move-to command to the point cx+r,cy; arc to cx,cy+r; arc to cx-r,cy; arc to cx,cy-r; arc with a segment-completing close path operation. ``` I think this is incorrect, that is, the sweep-flag should be 1, not 0, like it is for rounded rects for example (both are traced clockwise). With the current equivalent paths, I get this for some of the examples in the spec, showing that: - Path-data elliptical arcs are drawn correctly - Rounded rects using 1 as sweep-flag are rendered correctly - Circles and ellipses using 0 as sweep-flag are rendered incorrectly  Please view or discuss this issue at https://github.com/w3c/svgwg/issues/765 using your GitHub account
Received on Tuesday, 10 December 2019 18:11:12 UTC