Most simulations unstable and blow up.

[XorTdsc]

When using the provided link (https://electronicarts.github.io/pbmpm/) most simulations run fast, but are extremely unstable and blow up given the default settings. Given that the talk mentions stability to be the main strength I suspect a bug.

I'm on a MacBook Pro M1 MAX 14inch 2021 and using Chrome 133.0.6905.0

See video:

Untitled.mov

PS.: Besides the blow up which probably can be fixed this looks very promising. Good work ! I'd be very interested in seeing and playing with a stable version of this. :)

[XorTdsc]

Interestingly it runs as it should when using my PC (Chrome + RTX 3070 Ti). Is it possible that the Mac has precision issues ? Seems somehow unlikely though as I would expect more problems with games in that case...

[chlewin]

Yes, it looks like there is some kind of bug specifically with Mac. If I can get hold of the hardware I will look into fixing this, but also happy to accept a PR if you figure it out on your end. My initial guess would be that possibly local memory is not being correctly zeroed by the driver and this is causing these large forces to be generated.

[XorTdsc]

Yes, it looks like there is some kind of bug specifically with Mac. If I can get hold of the hardware I will look into fixing this, but also happy to accept a PR if you figure it out on your end. My initial guess would be that possibly local memory is not being correctly zeroed by the driver and this is causing these large forces to be generated.

Ah okay, that sounds like a good explanation for the issue. Not sure if I have time to to debug this in the near future, but if I do, I'll make a PR :)