On Mon, 31 Jul 2023 12:56:10 GMT, John Hendrikx <jhendr...@openjdk.org> wrote:
>> Michael Strauß has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> Make TransitionEvent final
>
> modules/javafx.graphics/src/main/java/com/sun/scenario/animation/StepInterpolator.java
> line 73:
>
>> 71: }
>> 72:
>> 73: if (t >= 0 && step < 0) {
>
> `t >= 0` always holds, perhaps the original `t` was meant here? The `t`
> parameter is re-assigned, which may be confusing.
This algorithm is implemented as
[specified](https://www.w3.org/TR/css-easing-1/#step-easing-algo), which
accounts for the possibility that the interpolator is used for a back-filling
animation (`t < 0`). While this is not possible in JavaFX (but may be possible
in the future), I think it makes sense to keep the algorithm as is, because it
ensures that its results are always correct, even though negative values for
`t` are currently out of spec.
-------------
PR Review Comment: https://git.openjdk.org/jfx/pull/870#discussion_r1279695148
