W3C home > Mailing lists > Public > www-style@w3.org > November 2009

Re: radial-gradient() proposal

From: Dean Jackson <dino@apple.com>
Date: Fri, 6 Nov 2009 09:55:04 +1100
Cc: Simon Fraser <smfr@me.com>, "Tab Atkins Jr." <jackalmage@gmail.com>, www-style list <www-style@w3.org>
Message-Id: <F6D0BE5A-CBD9-403D-8F09-92F32F607A32@apple.com>
To: Brad Kemper <brad.kemper@gmail.com>

On 06/11/2009, at 9:42 AM, Brad Kemper wrote:

> On Nov 5, 2009, at 2:15 PM, Dean Jackson <dino@apple.com> wrote:
>> also would resist the temptation to change the direction of  
>> rotation for angles, just because it seems more familiar to some  
>> people. The Web has a standard convention that we should follow.
> "The Web"?

Yes, where the X-axis points left and the Y-axis points down, and  
positive 90deg being the angle taken from the X-axis to the Y-axis  
(ie. clockwise).

This is something SVG had to accept, after years of fighting (I was on  
the Y-up side).

> I showed a couple examples on the Web where linear directions were  
> specified as angles that were measured by rotating the line  
> counterclockwise the number of degrees from zero, which pointed to  
> the right. The CSS units module does not specify a default rotation  
> direction for angles.

Sorry, I've looked through your emails on this thread and I can't find  
the examples on the Web you mention. I see your examples of documents  
on the Web, but that's different from deployed Web technologies.

> Is Tranforms the only other module using angles right now?

SVG - http://www.w3.org/TR/SVG/coords.html

It doesn't use the CSS module, but CSS transforms was designed to be  

Received on Thursday, 5 November 2009 22:55:40 UTC

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