W3C home > Mailing lists > Public > public-css-archive@w3.org > October 2020

Re: [csswg-drafts] [css-values-4] How to interpolate <ratio>? (#4953)

From: Tab Atkins Jr. via GitHub <sysbot+gh@w3.org>
Date: Mon, 19 Oct 2020 23:57:33 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-712504763-1603151852-sysbot+gh@w3.org>
@dbaron That is an excellent point: using division lets us avoid a scale-dependence (so going from `2/1` to `10/1` is the same as going from `20/10` to `100/10`), but it still introduces an orientation dependence; tall and wide versions of the same ratios interpolate differently.

Using the logarithm of the division, then, seems to make a lot of sense - it'll interpolate your examples by going from (wlog, using log2) `1` to `3.32` for the first, and from `-1` to `-3.32` for the second, exactly symmetric.

It also means that going from `1/2` to `2/1` will end up with a square `1/1` ratio in the middle of the transition, which I think is what authors would expect.

So if nobody objects, I'll change to using the logarithm of the division result.

-- 
GitHub Notification of comment by tabatkins
Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/4953#issuecomment-712504763 using your GitHub account


-- 
Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Monday, 19 October 2020 23:57:37 UTC

This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 06:42:20 UTC