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Re: frozen value for discrete animation

From: Hugh J. Sloan III <sloan01@earthlink.net>
Date: Fri, 25 May 2007 11:08:41 -0700 (GMT-07:00)
Message-ID: <23355094.1180116522219.JavaMail.root@elwamui-mouette.atl.sa.earthlink.net>
To: "Dr. Olaf Hoffmann" <Dr.O.Hoffmann@gmx.de>, www-smil@w3.org, cogit@ludicrum.org, sjoerd@acm.org

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-----Original Message-----
>From: "Dr. Olaf Hoffmann" <Dr.O.Hoffmann@gmx.de>
>Sent: May 25, 2007 9:39 AM
>To: www-smil@w3.org, cogit@ludicrum.org, sjoerd@acm.org
>Subject: Re: frozen value for discrete animation
>
>
>Hello,
>>
>> I propose to change the wording to "integral multiple" to make it clear
>> that we're talking about proper multiples here.  Alternatively, we could
>> just leave out the word "even", but I think (as apparently the original
>> author did also) that an extra adjective should make it even clearer.
>>
>> Sjoerd (member of the SYMM working group, so in a position to effect the
>> change)
>>
>
>I think this can avoid some confusion. The given formulars
>seem to be sufficient even without an additional adjective.
>
>What I found about this at wikipedia:
>'The integral value of a real number x is defined as the largest 
>integer which is less than, or equal to, x, see floor function.'
>
>Hmmm. The formular 
>'AD = d*i for some positive integer i'
>seems to be the important part of it to get 
>proper implementations.
>
>And what about the 'frozen value for discrete animation'?
>I still think, this is different in SMIL2 as with the old 
>SMIL animation recommendation or in SVG. They have
>only the time interval model and 
>'freeze the effect value at the last value of the active duration'.
>
>For this example:
>calcMode="discrete"
>values="1;2;3"
>keyTimes="0;0.4;0.8"
>begin="0s"
>dur="10s"
>end="4s"
>fill="freeze"
>
>Because a time interval is exclusive end, the last value is 1
>and not 2 for the old SMIL animation recommendation or in SVG.
>With the SMIL2 timing modul it will get 1 with the 'cut off simple 
>duration' or 3 with the 'dur value simple duration'. 
>With the animation modul again it depends on the interpretation
>of 'simple duration', the 'dur value simple duration' may result in
>applicable formulars resulting in 2 (?), not really fitting to the
>time interval model, with the 'cut off simple duration' the
>formulars are not applicable anymore. 
>But if in the animation modul 'simple duration' has another
>meaning as in the timing modul, the fill attribute is not
>well defined for animation anymore. Understandable that
>for example the CR SVGT1.2 still uses the old definition for
>the fill attribute. 
>
>
>
>


Hugh J. Sloan III
Managing Director and Founder Sand Hill EC
Menlo Park, CA  

General Partner
Sand Hill Partners LLC 
Boston, MA and Seattle, WA  Federal Tax ID 20-4644460

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Received on Friday, 25 May 2007 18:08:57 GMT

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