[BUG-139224] [Martini] Boobs constantly twitch/vibrate when wearing avatar physics on Maint-Martini

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Steps to Reproduce

• Login on a recent Neko build that includes the fix for MAINT-989 - Fixed Avatar Physics Vary Extremely With Different Framerates , (public bug VWR-25545 - Avatar Physics' calculation needs to be improved ) eg) This build: http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/viewer-neko/rev/329489/index.html

• Wear an avatar physics layer that will make the boobs bounce.

• Observe how the boobs bounce when playing an animation that triggers a noticeable boob bounce and when not playing any animations at all or subtle slow stand animations that wouldn't normally trigger the boobs to bounce much.

  Observed Behaviour

• The MAINT-989 fix works well when playing animations that trigger a noticeable boob bounce & at very low or high FPS, the boobs no longer flap about like a wet kipper or freeze at an odd angle.

• However, when not playing an animation that produces noticeable boob movement, the boobs twitch & vibrate all the time & it looks really odd. Just stand still with no AO animations playing & you should easily see the problem.

• Bug reproduces at various FPS, apart from very low FPS. Using the new FramePerSecondLimit in neko, I see the bug reproduce at FPS ranging from ~ 30 - 90 FPS (90FPS is the max I can get). FPS lower then 30 do not seem to reproduce the bug.

• See attached Gif. NOTE!!!! - The twitching/vibration is so fast, it barely shows on the gif, but it's pretty bad when you actually see it inworld. The higher the FPS in the viewer, the worse the problem is. My video capture software also lowers the FPS by ~30, so it doesn't show too well :(

• Users on CoolVL viewer, which has merged in the MAINT-989 fix already are also reporting the same problem with "Max Headroom" boobs. See http://sldev.free.fr/forum/viewtopic.php?f=4&t=1806

  Expected Behaviour

  When wearing an avatar physics layer, boobs should not vibrate & twitch when at rest.

Attachments

• Bzzzzzzzzzzz.gif 2017-10-14 18:05:56
• e541d0cf51c256a7a57d71fedc13aa32[1].mp4 2017-10-18 15:59:58

Original Jira Fields

| Field | Value | | ------------- | ------------- | | Issue | BUG-139224 | | Summary | [Martini] Boobs constantly twitch/vibrate when wearing avatar physics on Maint-Martini | | Type | Bug | | Priority | Unset | | Status | Accepted | | Resolution | Accepted | | Reporter | Whirly Fizzle (whirly.fizzle) | | Created at | 2017-10-14T21:09:58Z | | Updated at | 2017-12-16T02:06:59Z | ``` { 'Business Unit': ['Platform'], 'Date of First Response': '2017-10-14T17:13:28.796-0500', 'ReOpened Count': 0.0, 'Regression?': ['Issue is a Regression'], 'Severity': 'Unset', 'System': 'SL Viewer', 'Target Viewer Version': 'viewer-development', 'What just happened?': 'Filling in...', 'What were you doing when it happened?': '....', 'What were you expecting to happen instead?': '.....', 'Where': 'Tits', } ```

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Grumpity Linden commented at 2017-10-14T22:13:29Z

SHOWSTOPPER!!!

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Henri Beauchamp commented at 2017-10-15T11:15:30Z

Grumpity Linden exclaimed:

SHOWSTOPPER!!! ROFLOL !

I did not even notice before a user of my viewer reported that bug: I never used "body physics", and got it disabled in my settings... :D This said, the (IMO ridiculous/unrealistic) "jiggling boobs" feature is what made Emerald (and it's successor, Phoenix) so widely known and used... So, perhaps I'm totally wrong...

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Soft Linden commented at 2017-10-18T17:34:44Z

This JIRA came up during a meeting today. Nobody could keep a straight face. :)

We definitely look forward to any more clips that illustrate the problem!

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Beq Janus commented at 2017-10-18T19:59:59Z

[~soft.linden] as you wish

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Grumpity Linden commented at 2017-10-18T20:21:25Z

looks like a glitch in the matrix to me. Beq, was that with the new Maint RC? (http://wiki.secondlife.com/wiki/Release_Notes/Second_Life_Release/5.0.9.329497)

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Whirly Fizzle commented at 2017-10-18T22:14:58Z

As requested :D

Here is a better demo video - it still looks worse then this in world, you can only see the big twitches on this video, not the constant fast vibration. Note the boobs bounce normally when playing an animation, but start to periodically twitch when motionless.

https://i.gyazo.com/331d2b351ae01059fb6f256386d24a55.mp4

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Whirly Fizzle commented at 2017-10-18T23:07:26Z

I switched to better capture software & this one shows the vibration much better. https://gfycat.com/SpottedThinEmperorpenguin

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Soft Linden commented at 2017-10-18T23:11:14Z

Thanks! The additional video really makes the issue clear, especially the last gfycat. I'll copy that to the internal issue

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Whirly Fizzle commented at 2017-10-19T11:18:57Z, updated at 2017-10-19T11:19:27Z

Just to note, this bug is fixed on the latest Martini-RC: http://wiki.secondlife.com/wiki/Release_Notes/Second_Life_Release/5.0.9.329497 with https://bitbucket.org/lindenlab/viewer-neko/commits/4150695b5e8d11a7ecabee301c3fcdc6af44f2c2

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Whirly Fizzle commented at 2017-12-16T02:06:59Z

The latest batch of boob fixes in Neko are working really well. I tested on http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/viewer-neko/rev/330099/index.html

There is no twitching when boobs are at rest & the bounce remains pretty stable when at low & high FPS.