- From: Сергей Грехов <sgrekhov@unipro.ru>
- Date: Tue, 18 Nov 2014 15:21:35 +0600
- To: public-fx@w3.org
- Cc: dom@unipro.ru
Hi All,
Consider the following code:
var node = new AnimationGroup([]);
node.computedTiming.timeFraction === ???;
According the spec (http://w3c.github.io/web-animations/#time-fraction)
"time fraction of an animation node is calculated according to the
following steps:
If the iteration duration is zero,
the time fraction is as follows,
If local time < start delay,
Return the result of recalculating the transformed time using an
iteration duration of 1.
Otherwise,
Let normalized active duration be the result of recalculating
the active duration using an iteration duration of 1.
Return the result of recalculating the transformed time using
a local time of start delay + normalized active duration and
an iteration duration of 1.
Otherwise,
Return transformed time / iteration duration unless transformed time
is unresolved, in which case return an unresolved time value."
In our case. AnimationGroup has no children so iteration duration is zero
(http://w3c.github.io/web-animations/#the-intrinsic-iteration-duration-of-an-animation-group).
Next step. "If local time < start delay". In our case node has no parent
group and not associated with the player that means that inherited time
and therefore local time are both unresolved. Comparison with start delay
cannot be performed.
--
Regards,
Sergey G. Grekhov
Received on Tuesday, 18 November 2014 09:25:17 UTC