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Mageek

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Constrained Delaunay Triangulations for 2D Player Collision

timallanwheeler.com
1 points·by Mageek·3 yıl önce·0 comments

Solving Cart-Pole Swingup with a Hierarchical Controller

timallanwheeler.com
2 points·by Mageek·4 yıl önce·1 comments

comments

Mageek
·8 ay önce·discuss
Breadth vs. Depth.

Alg4Opt covers more topics, providing the motivation behind the algorithm, sometimes a basic derivation, and a concrete implementation. It has citations in the margin for more info.

Nocedal and Wright will go more in-depth on derivation, proving theorems, etc. Implementations are pseudocode, and fewer topics are covered.
Mageek
·2 yıl önce·discuss
To be clear, both are fiction, it’s just that one is fantasy and the other is set in modern reality.
Mageek
·2 yıl önce·discuss
The video doesn’t show how the car got into this situation
Mageek
·2 yıl önce·discuss
Rust has a method for enforcing better memory safety. That is great for deployed applications, but can be annoying when you’re still exploring / mutating your code to figure out the right shape of things.
Mageek
·2 yıl önce·discuss
The article says it: “We determined that due to the persistent orientation mismatch of the towed pickup truck and tow truck combination, the Waymo AV incorrectly predicted the future motion of the towed vehicle.” It was detected, but it predicted the truck would move in a way that it didn’t end up moving.
Mageek
·2 yıl önce·discuss
My mom was hit by a driver when she was biking and fell with her arm in front of the wheel. The driver then decided to pull forward and drove over her arm. So humans don’t really solve that problem.
Mageek
·3 yıl önce·discuss
NHTSA standing general order crash rates are a mandated and publicly available data source. That’s what the study is based on.
Mageek
·3 yıl önce·discuss
Another very good blog overview here (not mine): https://ianthehenry.com/posts/delaunay/

I love DCELs and have been tinkering with them in my own side projects lately. Very cool data structure!
Mageek
·3 yıl önce·discuss
Isn’t Waymo already operating a full service in Phoenix? Haven’t heard of many issues from there.
Mageek
·3 yıl önce·discuss
I highly recommend the course “Computer, Enhance!” by Casey Muratori on substack for those interested in how CPUs / assembly work. You get to decode byte code, simulate instructions, learn how the stack works, etc. It is really well-paced, gives you plenty of space to figure things out your own way (with reference material if you need it), and helped me get several “aha!” moments that solidified how things work.
Mageek
·3 yıl önce·discuss
I recently started the new class by Casey Muratori, “computer enhance”, that teaches performance-aware programming.

I also try to complete a small personal project every month and write about it.
Mageek
·3 yıl önce·discuss
“As of 2020, South Korea was the only country among the OECD members to have a rate below 1, giving it a shrinking population.”

Being below 2 gives you a shrinking population, because men are half the pop and don’t produce children directly.
Mageek
·3 yıl önce·discuss
You still run A*, it’s just on the nav mesh rather than on a grid.
Mageek
·3 yıl önce·discuss
The title is complete clickbait. It should say “no one’s short intuitive explanations of why planes stay in the air are fully correct”
Mageek
·4 yıl önce·discuss
A blog post in which the classic cart-pole swingup problem is solved with a hierarchical control method that breaks the problem down into a high-level search problem on top of low-level LQR controllers. Everything is derived and code is presented.
Mageek
·4 yıl önce·discuss
Chesterson’s Fence comes to mind. If you think you have an obvious solution, you’re almost surely missing something.

Killing people obviously has repercussions. Building more housing obviously has more complexities. Zoning is hard. Forcibly taking land is complicated. Building the other amenities (transportation, parking, etc.) is hard. Taxing billionaires is complicated. They fund other things, can put financial pressure in other places, etc. California’s exodus of the rich is a real problem. etc.

I think the real question of value here is “what am I missing such that I think obvious solution X solves the problem?”