It's interesting to see that Box3D was originally a fork of a physics engine made by Dirk. Dirk is one of the best presenters in GDC, and so influential in Physics Engine space, nice to see how he's continuing to push the latest and greatest forward.

His takes lack nuance, there's no analysis in his writing, just what appears to be fuming at vague issues he sees in society.

This post is confusing to me. From the blog's name, in addition to these other blog posts [1] and [2], you would think he's contributing to the doomerism that he's lamenting here. If the singularity is near, and the big companies control capital, then the doomerism is correct, no?

To add to that, his lack of critical thought shows up in other posts as well [3]. He does not really understand the nuance of fiat currency or entitlement programs. Like the blog post above, he also seems to like "offending" people for the sake of offending them. In [3], he seems to think insulting Christianity, despite being a Christian himself but not believing in the core of the religion, is somehow getting back at "wokists."

[1] https://geohot.github.io/blog/jekyll/update/2026/01/17/three...

[2] https://geohot.github.io/blog/jekyll/update/2026/02/13/i-tol...

[3] https://geohot.github.io/blog/jekyll/update/2026/04/18/five-...

Proper simulators for those exist, you essentially need an engine with a compliant contact model. MuJoCo is the goto here, see:

https://mujoco.readthedocs.io/en/stable/modeling.html#muscle... https://mujoco.readthedocs.io/en/stable/computation/fluid.ht...

These explicitly model biological muscles. IIRC it was originally created to model human hands (I could be misremembering though).

Really depends on the fidelity you want.

Edit: I also work in rigid body simulation for robotics.

It's really impressive that the author was able to implement rendering papers and physics sim papers with such regularity. It really is a feat. Makes me curious to see what their background is.

I know in older games, the recommendation was to keep gravity low (~6 m/s^2 iirc) to help with simulation stability and make things look better, that might contribute to your idea of things being floaty.

I don't find the examples in the git repo to be especially floaty, but I work with a lot of simulators so I might just be used to it.

https://www.canadapost-postescanada.ca/cpc/en/personal/consu...

And if someone was going to to make false allegations of abuse, why include specifics about how interrupting his calculus and drums caused his anger? Why not just say he was abusive, or state a more common reason for abuse? To me, the specifics make her statement more credible. Combined with his predatory history regarding women[1], I view Feynman as a distrubed individual (but a genius nonetheless)

I find the allegation credible, as I don't see why someone in her position would lie, and especially give specific details on what sets Feynman off.

Also, unless I see some concrete data about the amount/percentage of women who lie in order to get a divorce, the comment you linked is pure conjecture. Nothing really to argue about since it's just the vague idea of what people think about that time.

[1] https://thebaffler.com/outbursts/surely-youre-a-creep-mr-fey...

I don't see her having much incentive to lie and make up these statements, and see no evidence that she did lie. Some women lie about domestic abuse, most don't.

- Abortion bans in the US constitute abuses of female reproductive rights and affect millions: https://www.amnesty.org/en/latest/news/2024/08/usa-abortion-...

- The Iraq War, in my opinion: https://www.ecchr.eu/en/publication/the-iraq-invasion-is-a-c...

- Guantánamo Bay: https://www.hrw.org/news/2025/08/29/us-migrants-face-abuse-i... & https://www.amnesty.org.uk/guantanamo-bay-human-rights

- Yemen, broadly: https://www.amnesty.org/en/latest/news/2025/10/yemen-us-air-...

- Depending on who you ask, you could also point to large-scale violations of the rights of migrants and asylum seekers, as well as the over-policing of minority populations.

The US also does not consistently uphold the same values that you say liberal democracies should. It does business with Israel, Saudi Arabia, and others.

As for your second point:

“It’s extremely relevant. If you believe in personal liberties and democracy, you should only do business with societies that uphold personal liberties and democracy. It’s that simple.”

I would ask, why? I believe in personal liberties and democracy for my people, my community, and my country. If another country’s population does not hold those beliefs as a majority, why is that my concern? If we truly restricted trade only to countries that share our beliefs, our list of trading partners would be very small. What would the benefit be?

Additionally, given your request for citations, I suspect we would disagree significantly on which countries actually reflect our values. I am not sure we could arrive at a consistent list of partners that share our values. For example, I do not believe the USA has a strong democracy. It has a rather weak one. Should it be excluded as well?