ISSUE-2457: Why does svgmatrix.rotatefromvector(x,y) throw on y=0?

Why does svgmatrix.rotatefromvector(x,y) throw on y=0?

State:

RAISED

Product:

SVG 2

Raised by:

Opened on:

2014-02-17

Description:

Update the SVG2 spec to point to DOMMatrix for the definition of SVGMatrix[3]? Or update to align with the new definition of rotateFromVector there[1]?

It seems y==0 should be fine, but in SVG we let the method throw even if x!=0. See atan2[2].

Testcase:
data:text/html,<svg></svg><script>document.querySelector('svg').createSVGMatrix().rotateFromVector(1, 0); document.write('PASS');</script>

[1] http://dev.w3.org/fxtf/matrix/#widl-DOMMatrix-rotateFromVector-DOMMatrix-unrestricted-double-x-unrestricted-double-y
[2] http://en.wikipedia.org/wiki/Atan2
[3] https://svgwg.org/svg2-draft/coords.html#__svg__SVGMatrix__rotateFromVector

Related Actions Items:

No related actions

Related emails:

1. minutes, 27 February 2014 SVG WG telcon (from cam@mcc.id.au on 2014-02-28)
2. Agenda, 27 February 2014 SVG WG telcon (from ed@opera.com on 2014-02-26)
3. RE: agenda, 20 February 2014 SVG WG telcon (from Thomas.O.Smailus@boeing.com on 2014-02-25)
4. agenda, 20 February 2014 SVG WG telcon (from cam@mcc.id.au on 2014-02-20)
5. ISSUE-2457: Why does svgmatrix.rotatefromvector(x,y) throw on y=0? (from sysbot+tracker@w3.org on 2014-02-17)

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