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[Bug 15026] New: Need a mechanism to draw elliptical arcs. Once available this can be extended to draw an ellipse. 1. Current methods of drawing them with beziers/quadratic curves do not work well and are approximations. 2. Using arcto/arc followed by scaling distorts the

From: <bugzilla@jessica.w3.org>
Date: Thu, 01 Dec 2011 05:23:57 +0000
To: public-html@w3.org
Message-ID: <bug-15026-2495@http.www.w3.org/Bugs/Public/>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=15026

           Summary: Need a mechanism to draw elliptical arcs. Once
                    available this can be extended to draw an ellipse. 1.
                    Current methods of drawing them with beziers/quadratic
                    curves do not work well and are approximations. 2.
                    Using arcto/arc followed by scaling distorts the
           Product: HTML WG
           Version: unspecified
          Platform: Other
               URL: http://www.whatwg.org/specs/web-apps/current-work/#top
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P3
         Component: HTML Canvas 2D Context (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: contributor@whatwg.org
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,
                    public-html@w3.org


Specification: http://www.w3.org/TR/2dcontext/
Multipage: http://www.whatwg.org/C#top
Complete: http://www.whatwg.org/c#top

Comment:
Need a mechanism to draw elliptical arcs. Once available this can be extended
to draw an ellipse.

1. Current methods of drawing them with beziers/quadratic curves do not work
well and are approximations.
2. Using arcto/arc followed by scaling distorts the strokestyle
3. Generating elliptical arcs by approximating lines, etc are tedious to
implement and error prone


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Received on Thursday, 1 December 2011 07:28:01 GMT

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