- From: Jan-Ivar Bruaroey <jib@mozilla.com>
- Date: Tue, 12 Aug 2014 12:17:30 -0400
- To: Martin Thomson <martin.thomson@gmail.com>
- CC: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Eric Rescorla <ekr@rtfm.com>, "public-media-capture@w3.org" <public-media-capture@w3.org>, "bugzilla@jessica.w3.org" <bugzilla@jessica.w3.org>
On 8/11/14 6:17 PM, Martin Thomson wrote: > On 11 August 2014 14:34, Jan-Ivar Bruaroey <jib@mozilla.com> wrote: >> Actually, the spec already says: "The exact aspect ratio (width in pixels >> divided by height in pixels), represented as a double rounded to the tenth >> decimal place" [1] >> >> So we effectively have our epsilon already: .0000000001 >> >> So no action required it seems. > Oh, that's good, there's an epsilon; but it's bad. 1.777777778 isn't > the same as 16/9 based on that. Nor is 1.7777777777. Add a single > digit to either and it would match. I may have counted wrong. I'm > sure that others will too. Feel free to propose a different epsilon I suppose. I presume this would have nothing to do with inaccuracies inherent in floating-point math then (or we could have picked an epsilon much closer to everyone's worst machine epsilon), but instead from a desire to accommodate people handwriting rounded decimal numbers for aspect. Just so we're clear on the properties we seek. .: Jan-Ivar :.
Received on Tuesday, 12 August 2014 16:17:59 UTC