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RE: Questions regarding animation requirements in UAAG 1.0

From: Jon Gunderson <jongund@uiuc.edu>
Date: Tue, 27 Feb 2001 15:20:17 -0600
Message-Id: <4.3.1.2.20010227151533.03547848@staff.uiuc.edu>
To: "Patrick Schmitz" <pschmitz@microsoft.com>, "Ian Jacobs" <ij@w3.org>, "Cohen, Aaron M" <aaron.m.cohen@intel.com>
Cc: <clilley@w3.org>, <w3c-wai-ua@w3.org>, <dd@w3.org>, <asgilman@iamdigex.net>
Patrick,
Thank you for your sending these demos to the user agents attention.

Is the "+TIME" part of the HTML+TIME label for the web site part of the 
SMIL or CSS specifications?

Will you be at the all working group meeting later this week in Boston?

Jon


At 09:17 AM 2/27/2001 -0800, Patrick Schmitz wrote:
>You can do all this right now in IE 5.5.
>
>Here is a pointer to my personal demo page (only looks like much in IE
>5.5):
>http://research.microsoft.com/~pschmitz/demos/H+Tdemos.html
>
>and for a demo of speed, see the orbit demo (first one on the page
>above):
>http://research.microsoft.com/~pschmitz/demos/orbit2.htm
>
>This includes binding to buttons (no script) for reverse, fast forward,
>slow forward and volume control (not that there is no script used in
>this animation, even for the button controls). Everything is wired
>declaratively. Note that the midi audio plays at all forward rates, at
>the correct speed but no pitch corrected. I have not yet found an audio
>or video decoder commonly used on the web that behaves well with reverse
>speeds (but the SMIL 2 model includes rules for graceful degradation in
>these cases).
>
>Even if you do not have IE 5.5 and so cannot play the animation, you can
>fetch it into the HTML browser of your choice and then view the source.
>I would be happy to answer further questions.
>
>If you are interested in speed animations in particular, we should talk
>about the model IE implemented, which is a VTR model rather than a pure
>DOM model (I can explain the differences if you care).
>
>Hope this helps - Patrick
>
> > -----Original Message-----
> > From: Ian Jacobs [mailto:ij@w3.org]
> > Sent: Tuesday, February 27, 2001 9:02 AM
> > To: Cohen, Aaron M
> > Cc: Patrick Schmitz; clilley@w3.org; w3c-wai-ua@w3.org; dd@w3.org;
> > asgilman@iamdigex.net
> > Subject: Re: Questions regarding animation requirements in UAAG 1.0
> >
> >
> > Hello,
> >
> > I ran into Aaron here at the Sonesta hotel, and pursued the
> > question of animation control for a few minutes. Aaron pointed
> > me to the following resources:
> >
> > 1) The 'speed' attribute is defined in section 11.1.3 of the
> >    time manipulation module of SMIL 2.0 [1].
> >
> >    The attribute defines the playback speed of element time.
> >    Values can be negative, for playback in reverse. This suggests
> >    that fast forward and reverse are also possible.
> >
> > 2) IE 5.5 may already implement this attribute (not absolutely sure,
> >    but they do implement the accelerate and decelerate attributes).
> >
> > 3) One could specify "speed=.5" on the root time container element
> >    and slow down a whole document by half. Or one could do this on
> >    an element-by-element basis.
> >
> > 4) I'm not aware of players that let you do this today through the
> >    user interface.
> >
> > So, this is starting to suggest to me our requirements for animation
> > control are covered by the SMIL 2.0 spec.
> >
> >  - Ian
> >
> > [1]
> > http://www.w3.org/TR/2000/WD-smil20-20000921/smil-timemanip.ht
>ml#TimeManip-accelerateSyntax
>
>--
>Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
>Tel:                         +1 831 457-2842
>Cell:                        +1 917 450-8783

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
MC-574
College of Applied Life Studies
University of Illinois at Urbana/Champaign
1207 S. Oak Street, Champaign, IL  61820

Voice: (217) 244-5870
Fax: (217) 333-0248

E-mail: jongund@uiuc.edu

WWW: http://www.staff.uiuc.edu/~jongund
WWW: http://www.w3.org/wai/ua
Received on Tuesday, 27 February 2001 16:18:04 UTC

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