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Ultrathin business card runs a fluid simulation

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Re: Ultrathin business card runs a fluid simulation

#121

Post by aDyslecticCrow »

maccard wrote: post #7
raincole wrote: post #4

Off topic, but where should one start learning writing physical simulation? Several years ago I ran into this project [0] and got overwhelmed even the algorithm can be written in 88 lines of C++. I realized that out of all CS topics, physical simulation is probably the one I knew the less (not saying I'm a compiler/database expert or something, but at least I've implemented a toy compiler and some basic data structur…

Rigid body simulations are much much simpler. There’s a siggraph course from 2001 [0] which is a bit of a dense read but it will bring you all the way up to a full blown rigid body simulation and understanding the math behind it too. [0] https://graphics.pixar.com/pbm2001/pdf/notesg.pdf

Ive done one myself. Very fun and very valuable project, with alot of optional deapth.

Solar system simulation is another fun one, leaning more into nummerical differental equations solving.

Re: Ultrathin business card runs a fluid simulation

#122

Post by dawnofdusk »

raincole wrote: post #4

Off topic, but where should one start learning writing physical simulation? Several years ago I ran into this project [0] and got overwhelmed even the algorithm can be written in 88 lines of C++. I realized that out of all CS topics, physical simulation is probably the one I knew the less (not saying I'm a compiler/database expert or something, but at least I've implemented a toy compiler and some basic data structur…

Essentially all physics simulations are either particle based or based on integration of differential equations (although in a computer both approaches involve a discretization which makes them somewhat computationally similar). You can consider reading through Numerical Recipes which is sort of the bible for this stuff for physicists, but it is aimed at scientific audiences with weak CS background. Something like Computer Simulation of Liquids by Allen could be a good start too. Let's be clear that the approach I'm talking about here is focused more on physical correctness: if you are a game designer it's not important that your fluid simulations are physically correct and more that it looks physically correct to a player, and there are a variety of more heuristic techniques for something like that.

Re: Ultrathin business card runs a fluid simulation

#123

Post by AnotherGoodName »

uticus wrote: post #115
MobiusHorizons wrote: post #110

Earlier quoted context omitted.

Is a cr2032 shorting it is not dangerous, it can’t supply the current to get hot enough do any real damage.

It says rechargeable, maybe a CR2032 size but prob lithium chemistry. Even a small size could create quite a hazard if shorted.

The C in CR2032 means lithium fwiw. As in it's lithium either way.

The LiR2032 (rechargable lithium) are slightly higher voltages but pretty much the same total energy.

Fwiw if you ever have electronics that require 3V minimums the LiR2023 is better than the CR2032 since it's 3.7V vs 3V in the same form factor. It's common knowledge that the ESP32 for example can glitch on a CR2023 since it needs 3V minimum but it'll actually run fine on a LiR2032.

Re: Ultrathin business card runs a fluid simulation

#124

Post by abdullahkhalids »

5- wrote: post #20

i absolutely love the form factor! a similar one was beamu (eink screen, nrf52 with bt): https://nicgardner.com/2020/05/09/beamu-first-impressions/ (this was an actual product, if a bit pointless. i have one still) any others?

This is so cool. I wish something like this had the ability to load your debit/credit cards into it. Advantages over using the card directly or a wallet app on your phone.

1. You don't voluntarily give your financial transaction info to big tech.

2. Your card details are hidden. So if your wallet gets stolen, less danger of fraudulent transactions.

3. Carry one heavy card instead of many light ones.

4. Don't have to memorize the pin of all the cards. Or the pin just shows on the mini screen after finger print authentication.

Re: Ultrathin business card runs a fluid simulation

#126

Post by JumpCrisscross »

mritchie712 wrote: post #22
ChrisMarshallNY wrote: post #9

Very nice, but probably a bit too expensive to just hand out. I knew a chap that had a similar hardware business card (I don't remember exactly what it did, but it wasn't as cool as this one). I remember that his card was pretty scuffed up, and he insisted I give it back, after he handed it to me. Bit weird.

[flagged]

> GPT-o3 estimates

Please don’t do this.

Re: Ultrathin business card runs a fluid simulation

#127

Post by JumpCrisscross »

93po wrote: post #99
messe wrote: post #32

Earlier quoted context omitted.

[flagged]

i disagree on this, people comment with stuff anyone could google all the time. its nice to see info without doing it myself, and esp when often i never would. however gpt-whatever is a bad choice for this bc its a very likely scenario to make up bs

> people comment with stuff anyone could google all the time

But presumably with some knowledge or review of it. Commenting with a link to the first Google result comes across about as well as quoting an LLM output.

Re: Ultrathin business card runs a fluid simulation

#128

Post by donohoe »

xp84 wrote: post #100
donohoe wrote: post #76

If they used a sans-serif font then they would have nailed it

disagree, a nice serif font is more distinctive with most of everything using a very tight cluster of boring sans-serif fonts.

In that case I will add that this particular serif font was also a poor choice out of the variety of serif fonts out there.
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