jfrd

11 ms·

1.
by jfrd 3y ago
Brandon helped me solve an interesting problem during my PhD. I was building a sun-tracking sensor for a solar-powered lunar rover, and I needed to calculate the vector from the robot to the sun. Brandon showed me how to use skyfield to sol
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by jfrd 3y ago
Surprisingly you can solve massive TSPs using heuristics. The solutions are not guaranteed to be optimal, but they can get very close to optimal without a crazy amount of computing power. The Concorde TSP solver can apparently solve instanc
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by jfrd 3y ago
Are any subtopics particularly interesting to you? Mechatronics, Computer Vision, Control Theory, State Estimation, Path Planning, etc?
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by jfrd 4y ago
Check out PBRT, an academy award winning book about a rendering codebase! https://pbrt.org/
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by jfrd 4y ago
I think it is a reference to “Cracking the Coding Interview”, a book that teaches you how to pass FAANG interviews.
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by jfrd 4y ago
Find a project you want to build and stop at nothing until it works. Repeat. Caveat: pick things that are just beyond your current level of knowledge.
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by jfrd 5y ago
I’m a PhD student with ~5years ROS experience. What is your programming experience level? Why do you want to learn ROS?
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by jfrd 5y ago
The Kershaw Leek pocket knife. Flips open one-handed and makes a satisfying “snick”. I’ve used mine daily for 5 years. https://www.amazon.com/dp/B0009VC9YK/ref=cm_sw_r_cp_api_glt_...
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by jfrd 5y ago
Personally, I hate anything that clutters my home directory. Have they added an option to relocate ~/snap?
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by jfrd 5y ago
Could it be that the examples of “good” architecture were selected over centuries by the communities that chose to preserve them, while the “bad” examples were chosen by pretentious hacks who don’t have to live and work near these buildings
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by jfrd 5y ago
For those who didn't click the link, this is a joke response to the author's tweet: "I am bracing for the inevitable comments about C++ being the most terrible thing since forever :("
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by jfrd 5y ago
Too bad C++ is the most terrible thing since forever. https://twitter.com/Cor3ntin/status/1383875999033565194?s=20
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by jfrd 6y ago
Cool! Check out the textbook “Probabilistic Robotics” for great explanations of the Kalman filter zoo. Bayes Filtering, Kalman Filtering, EKF, UKF, Particle Filter, etc.
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by jfrd 6y ago
Could you add some instructions to the demo? Maybe it’s obvious and I missed it, but I can’t figure out how to rotate a piece. I’m using an iPhone.
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by jfrd 6y ago
Andy Warhol was surely some kind of marketing genius.
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by jfrd 6y ago
You could use a co-routine to generate the magic numbers. Something like this: def gen_magic_nums(): for i in range(100): yield i**2 for num in gen_magic_nums(): add_to_plot(num)
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by jfrd 6y ago
I love my X1 Gen 7, but the black soft-touch coating started peeling within a week of buying it. I hope they've fixed that because it is otherwise my favorite laptop I've ever owned.
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by jfrd 6y ago
I emailed Ralph Baer when I was about 13 to ask if he knew where I could get an original pong chip to build my own video game. He sent me an extremely nice response explaining that he didn’t have any of the chip any more, but that I didn’t
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by jfrd 6y ago
I was never going to see a penny from social security anyway. Maybe this will save me two years of payments into the federal slush fund!
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by jfrd 7y ago
Nope. The Lidar pulses are encoded uniquely to each sensor, so one sensor can filter out an (already unlikely) direct hit from another lidar. The cameras are IR filtered and also unlikely to get hit by the lidar. Radar is pulse encoded in a
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by jfrd 7y ago
I believe some of them are from inigo quilez. I know the snail is. https://www.iquilezles.org/store/
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by jfrd 7y ago
I read Cuckoo’s Egg and also liked “The Soul of a New Machine”, “SkunkWorks”, and “The Making of the Atomic Bomb”.
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by jfrd 7y ago
Iterative Deepening A Star