Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

MuJoCo – Advanced Physics Simulation

github.com

Post reply on HN
Print view View original

11–20 of 27 posts

Re: MuJoCo – Advanced Physics Simulation

#11

Post by cachius »

prathje wrote: post #5
cachius wrote: post #3

This is what StuffMadeHere used in his latest video to simulate a mini-golf course! https://www.youtube.com/watch?v=2OfjZ3ORJfc&t=368s The physics engine I'm using is called MuJoCo. And if you're wondering why I didn't write my own physics engine, it's basically because I don't have 20 years.

That the calibration got the simulation so close to reality was quite impressive.

Though he had to resort to manual calibration. I always find he has interesting problems for domain experts and would like to see him team up with one. Also with programmers for faster programs than self taught python.

Re: MuJoCo – Advanced Physics Simulation

#12

Post by Rebuff5007 »

Not sure why this is hitting the home page right now but people may also be interested in Mujoco Playground [1] which is the latest RL environment wrapper of mujoco, implementing both classic deepmind-control benchmarks, and some very new interesting ones!

[1] https://playground.mujoco.org/

Re: MuJoCo – Advanced Physics Simulation

#13

Post by Izikiel43 »

cachius wrote: post #11
prathje wrote: post #5

Earlier quoted context omitted.

That the calibration got the simulation so close to reality was quite impressive.

Though he had to resort to manual calibration. I always find he has interesting problems for domain experts and would like to see him team up with one. Also with programmers for faster programs than self taught python.

The guy has a masters in compsci and mechanical engineering, he has done both python and c++ afaik for his projects

Re: MuJoCo – Advanced Physics Simulation

#14

Post by v9v »

sheepscreek wrote: post #8

This makes me so happy and excited! Often my mind wanders into the unknown, imagining what would happy to X if it did this? Would it have friction, etc? I am looking forward to a way I can easily describe a scenario and have an LLM build a legitimate simulation for it. No more hypothetical talk! Next best thing to actual experimentation (can be a useful tool in convincing others to join you/support you in said real e…

One thing to be mindful of is that you can get a simulation to behave in (almost) any way you want if you set the parameters right, so you should take care to understand the assumptions that you're baking into your sim before taking its results as gospel.

Re: MuJoCo – Advanced Physics Simulation

#15

Post by gspr »

sheepscreek wrote: post #8

This makes me so happy and excited! Often my mind wanders into the unknown, imagining what would happy to X if it did this? Would it have friction, etc? I am looking forward to a way I can easily describe a scenario and have an LLM build a legitimate simulation for it. No more hypothetical talk! Next best thing to actual experimentation (can be a useful tool in convincing others to join you/support you in said real e…

> what would happy to X if it did this? Would it have friction, etc?

MuJoCo does not simulate at a scale where you can discover whether something has friction or not. Friction is a parameter to MuJoCo's simulations.

Re: MuJoCo – Advanced Physics Simulation

#16

Post by s0rce »

Rebuff5007 wrote: post #12

Not sure why this is hitting the home page right now but people may also be interested in Mujoco Playground [1] which is the latest RL environment wrapper of mujoco, implementing both classic deepmind-control benchmarks, and some very new interesting ones! [1] https://playground.mujoco.org/

Probably because of the StuffMadeHere video

Re: MuJoCo – Advanced Physics Simulation

#17

Post by saran-t »

While we have people's attention here, we're also working on an official browser-based interactive viewer that allows people to specify a URL to their own model and share a link.

Very early experimental prototype at the moment, doesn't work super well on phones yet, but you can try it at https://saran-t.github.io/mujoco/?model=https://raw.githubus...

It'll be relocated to live.mujoco.org over the next few days.

Re: MuJoCo – Advanced Physics Simulation

#20

Post by nestorD »

cachius wrote: post #3

This is what StuffMadeHere used in his latest video to simulate a mini-golf course! https://www.youtube.com/watch?v=2OfjZ3ORJfc&t=368s The physics engine I'm using is called MuJoCo. And if you're wondering why I didn't write my own physics engine, it's basically because I don't have 20 years.

It's what put MuJoCo on my radar recently! But I was surprised to not see him do any kind of gradient descent to optimize his hyperparameters. MuJoCo has a JAX backend so it should be fairly straightforward.
Post reply on HN