shaking dominos how to settle

[donbonbon]

I started the exercise and my dominos shake. I scaled the scene, place the shakes per minute to 200 then 400 it still shakes. 

I scaled, ctrl+a, I sanpped it back to origin point. 

I’m frustrated as I feel like trying randomly try to solve a problem without even understanding it cause, and I wish to get a structured learning, to  understand so I can use this for future situations.

Can you please help?

[Jonathan Lampel]

Hey @donbonbon , do they shake from the start or do they shake only when they’re supposed to be lying still on the ground? I’d be happy to take a look at the file if you upload it to dropbox, pasteall.org , or something. Generally the things you tried would be the right way to fix it. 

[donbonbon]

Hi Jonathan, 

Thanks for your help.

I think I found the reason, 

Bug T52238. Gravity ignores units scale. The issue is simply that certain subsystems of blender ignore the unit scale, while others do not. A mismatch basically.
I read some discussions about the issue. It seems the workarounds is to divide the gravity by the applied scale. In my case I changed the gravity to -981m/s² and it worked.
Suddenly, even with normal starting values, the physics well behaved.

This bug should be dealt in V.2.8, I still use 2.79.

In case it can help, here’s the link to my Blend file.

https://www.dropbox.com/s/vlq0mxuvnm03d8j/dominoes16.blend?dl=0

[Jonathan Lampel]

Wow that’s interesting, thanks for the full explanation! 

[Author]

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