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Re: New version of mesh branch.

From: Chris Lilley <chris@w3.org>
Date: Tue, 7 Feb 2012 02:42:54 +0100
Message-ID: <687923676.20120207024254@w3.org>
To: Rik Cabanier <cabanier@gmail.com>
CC: Israel Eisenberg <owlgems@yahoo.com>, Tavmjong Bah <tavmjong@free.fr>, Cyril Concolato <Cyril.Concolato@cisra.canon.com.au>, www-svg <www-svg@w3.org>
On Monday, February 6, 2012, 5:55:38 AM, Rik wrote:

(Tav wrote)
>>  * Having a derivative of zero along the edge handles the case where the
>> color at the edge is at a maximum or minimum but we also need to
>> smoothly join patches where the color along the edge is in between. 


>>  (And the problem is more complicated when red, blue, and green all have
>> different profiles.)

RC> What does a "profile" mean? Does it refer to an ICC profile?

I was confused by that too, until I saw the second diagram in Tav's blog post
http://tavmjong.free.fr/blog/?p=361

where a three dimensional shape is shown, edge on,  and the meaning seems to be 'the shape as seen in profile'.

Having different 'profiles' (in this geometric sense) drawn in red, and in blue, and being described in the text as 'color profiles' is rather confusing.

Speaking of that diagram, the slope discontinuity on the blue curve looks worrying.

-- 
 Chris Lilley   Technical Director, Interaction Domain                 
 W3C Graphics Activity Lead, Fonts Activity Lead
 Co-Chair, W3C Hypertext CG
 Member, CSS, WebFonts, SVG Working Groups
Received on Tuesday, 7 February 2012 01:46:05 GMT

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