[MPEG-OTSPEC] "anim" feature tag

[Behdad Esfahbod]

How would `anim` feature work? Would the client be responsible to apply a
(G1 / G2) continuous curve to it to get the pulsating effect you want
then?  In other words, do the min/max of the axis have to be the same or
can be different?

behdad
http://behdad.org/


On Wed, Jan 31, 2024 at 1:45 AM Skef Iterum via mpeg-otspec <
mpeg-otspec at lists.aau.at> wrote:

> This is another proposal idea I can't do properly in the pre-April time
> frame, but it's short and simple.
>
> Imagine you're a video editor working on a cable commercial about a new
> way to Make Lots of Money!!!  You overlay a row of dollar signs from a
> cool variable display font and animate them to "pulse" by changing their
> weight. Unfortunately, when you look at the result the number of slashes
> in each dollar sign keeps changing, greatly distracting your otherwise
> elegant and sophisticated effect.
>
> The problem here is that doing the right thing for a given position in
> design space isn't always the right thing for animations that change the
> design space.
>
> I think this distinction calls for a new registered feature tag,
> probably 'anim', that when active avoids, undoes, or compensates for any
> (or most) such abrupt adjustments. While this is something that could
> always just be thrown onto 'ss15' or whatever, it would be better to
> have a reserved name so that animation tools can leave that tag turned
> on by default.
>
> A registered feature tag would also indicate something by its presence
> in a font: "we've thought about this problem". Designers might even
> throw it into a font with no such adjustments just to advertise that it
> is compatible with animation use.
>
> This is a simple enough idea, but I lack the context to come up with
> specifically what the section needs to say -- what advice to give to
> designers. Someone closer to the design side of things would do a better
> job. If anyone comes up with that wording but doesn't want to worry
> about ISO header pages and such, send it to me and I'll wrap it up into
> a proposal.
>
> Thanks,
> Skef
>
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