Viewing profile — otaviogood

FWIW, I tried the prototype. It's very real. I scanned my hand and arm. It showed realtime images of slices of my hand as I dipped my hand in the water. Really amazing IMO. I think…

for an introduction to the CAD software, Kicad, which this project uses, I really liked "Shine on you crazy Kicad": https://www.youtube.com/watch?v=eMW9ohCbcik&t=27s It takes you f…

Like many have said, start with Arduino-like boards + servos. You can get servo driver boards that let you plug in multiple servos to your Arduino without power problems. Get those…

You might be reading into it too much. I think the originals were just random pieces of different kinds of paper. Graph paper, yellow lined, paper, blank white paper... I don't rem…

DARPA scanned the shreds. The funny thing is, they didn't want to shred the original paper, so first they photocopied the paper in a high quality color copier, shredded it, and sca…

Me and my team used these yellow tracking dots to reconstruct shredded documents for a DARPA shredder challenge over a decade ago. You can see our program highlight the dots as we …

This is much more interesting if you see the animations. https://x.com/jaschasd/status/1756930242965606582

‘1984 is 1 token. 1884 is 2 tokens.’ I would be surprised if they use this tokenization still as it’s not math friendly.

Where do you see the room for improvement that gets you to much faster speeds? Also I love the single file to do everything. :)

The geometry in my raytracer can either be ray-traced primitives, like spheres or boxes, or it can be "signed distance functions" (SDFs), which let you define all kinda of crazy sh…

This article talks about a pretty full-featured ray tracer. If you just want to play around with some ideas and have fun, you can make different tradeoffs and still get very nice a…

I thought it would be nice to listen to these with my podcast player on iphone. Here's my too-complicated process that worked: - in Chrome inspector, look at the network tab when y…

Maybe we should have tried Daily. :) We tried Twilio video and unfortunately had a really hard time tracking down bugs. Wasted tons of time on that and then went back to doing our …

25 person Zoom calls aren't fun. So me and my friends made a virtual gathering space for people to host online events, meetups, social hours, etc. Tech: Frontend uses Svelte / Snow…

I think this eventually turned into Andrej Karpathy's class at Stanford, CS231n. The class notes are here: http://cs231n.github.io/ The class is on youtube. If you like this hacker…

People say you have to "do" math to learn it. Usually they make it sound like you need to do the exercises in the books. I think that doing just that can be boring and demotivating…

Books might not be the best resource for Shadertoy-type stuff. Almost all of Shadertoy 3d shaders use a technique called ray-marching with signed distance functions. If you Google …

Shadertoy shaders _do_ include the render algorithm. That shader is completely ray-traced, so the only real input that is used for that shader is the x, y coordinates and time. It'…

It could be fun if you released your tagged data set of lego piece pictures so people in the ML community could try to write classifiers. Even untagged pics could be interesting.

http://www.arxiv-sanity.com That helps sort through arxiv papers and get recommendations.

The Skew language compiles to Javascript, C#, and C++ (which is still a work in progress). So if you don't like that it's in Skew, you might have the option to switch it to one of …

Yes, one of the keys to reconstructing the harder puzzles was that we found a yellow dot pattern on the paper. At the time, I was reading HN and I saw a headline that said somethin…

I was on the team that won the shredder challenge. I talked to one of the UCSD people afterwards and he practically convinced me that my team did it. After a while I realized that …