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Re: [csswg-drafts] [css-values] Radians considered useless without π

From: Christoph Päper via GitHub <sysbot+gh@w3.org>
Date: Tue, 20 Dec 2016 13:45:18 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-268246347-1482241517-sysbot+gh@w3.org>
- In an ideal world,
  * all math would be using &tau; and hence CSS would be using `tau` 
(instead of `turn` and `rad`).
- In the real world,
  * professional math is using &pi; together with (often implied) 
‘rad’, while CSS is using explicit `rad` *without* &pi; and, rarely, 
`turn` instead of `tau`, &tau; or 2π,
  * colloquial math is using ° and hence CSS is using `deg` (in 
addition to `turn` and `rad`).
-  In @tabatkins’ conclusion, actual people should assume *ideal* math
 and apply it to actual CSS,  
  i.e. &tau; = `1turn` = 2π ≈ `6.283rad`.
- In my conclusion, actual people should assume actual math and be 
able to apply it to actual CSS,   
  i.e. π = `1pi` (or `1pirad`) = ½&tau; = `0.5turn` ≈ `3.141rad`, just
 like 1° = `1deg`.

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Received on Tuesday, 20 December 2016 13:45:24 UTC

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