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Implement reverse playback for animtree #41728

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Implement reverse playback for animtree #41728

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TokageItLab
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For #21665 and #27215.

  • Since it is assumed to be a non-reverse play, find() gets the key frame just before the current time.
  • Also, the Animation Node was interfering with the loop and root motion.

This fix solves these issues and implements a negative Time Scale in the Animation Tree.

https://www.youtube.com/watch?v=iPIG41NEgyM

I've uploaded a sample project to be used for testing.

animation_tracks_test.zip
reverse_root_motion.zip

@TokageItLab TokageItLab mentioned this pull request Sep 2, 2020
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@Calinou Calinou added cherrypick:3.x Considered for cherry-picking into a future 3.x release enhancement topic:core labels Sep 2, 2020
@Calinou Calinou added this to the 4.0 milestone Sep 2, 2020
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fire commented Sep 10, 2020

We discussed how root motion support needs to be tested.

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TokageItLab commented Sep 11, 2020 •
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Those have been resolved.
Previously, the root_motion was Transform.IDENTITY when seeking. With this fix, that value will be the difference between the root motion before and after the seek. If you want to keep the previous behavior, please implement that it does not apply the root_motion when seeking in GDScript.

@TokageItLab TokageItLab force-pushed the implement-reverse-playback branch from 58de2d7 to 2a8531c Compare September 30, 2020 06:13
@TokageItLab TokageItLab reopened this Sep 30, 2020
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TokageItLab commented Sep 30, 2020 •
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I cleaned up commits

@TokageItLab TokageItLab mentioned this pull request Dec 7, 2020
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@TokageItLab TokageItLab mentioned this pull request Jan 10, 2021
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Shatur commented Mar 21, 2021

What is the status of it?

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This was referenced Apr 29, 2021
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@TokageItLab TokageItLab force-pushed the implement-reverse-playback branch from 498558c to 4113abd Compare May 1, 2021 12:34
@TokageItLab TokageItLab requested a review from a team as a code owner May 1, 2021 12:34
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TokageItLab commented Aug 11, 2021 •
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Superseded by #48332.

@akien-mga akien-mga added archived and removed cherrypick:3.x Considered for cherry-picking into a future 3.x release labels Aug 11, 2021
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note: salvageable for 3.x

@TokageItLab TokageItLab deleted the implement-reverse-playback branch September 16, 2022 21:04
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@TokageItLab @fire @Shatur @daleblackwood @Calinou @aaronfranke @akien-mga