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Re: [css3-transforms] neutral element for addition - by animation

From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
Date: Tue, 5 Jun 2012 10:11:33 +0200
To: www-svg@w3.org, public-fx@w3.org
Message-Id: <201206051011.34266.Dr.O.Hoffmann@gmx.de>
Dirk Schulze:

...
>
> But that does not prevent us from changing it. Would just be one more
> difference to SMIL :).
>

Well, this change from 0 to an arbitrary value would corrupt cumulative
behaviour as well, this means, for animateTransform the chain of
computation is already broken at the level of cumulative behaviour,
not only modified for additive behaviour, what is the last step in the
chain.
As mentioned already, you would need to redefine the meaning 
of scale itself, to avoid all problems related to animation, 
using exp(a) instead of a as factor, if scale(a) is noted. 
Fortunately most funny things with animateTransform are fixed
already in SVG tiny 1.2 with a lot of discussion and work, it would
be pretty contrapoductive to ignore all this again just because there
is a problem for some people to distinguish between 0 and 1 
(what is essential for many things by the way - its worth to learn
the difference in general ;o)

Olaf
Received on Tuesday, 5 June 2012 08:12:07 GMT

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