Finally got my RL trained policy working in sim! This was trained using behavior cloning (from a manually constructed policy) followed by PPO. This video shows me using a gamepad to control the robot. The neural net is ran using Rust's ndarray library. #rust #ndarray #robots #reinforcementlearning

The stupidity, the criminal vandalism, the wanton destruction of information involved in dichotomisation statmodeling.stat.columbia.edu/2026/02/14/t...

❤️ Happy I Love Free Software Day! OpenProject is fully GPLv3 Free Software – across all editions. But free software doesn’t maintain itself. It takes dedicated maintainers, contributors, and long-term commitment. Thank you to everyone who makes it possible 💙 #ilovefs #GPLv3 #OpenSource

I made this harbor seal for Valentine's Day. 3D printed PLA + acrylic paint, model made in Blender. #3dprinting

Scurry scurry scurry. #reinforcementlearning #robot

My job had a woodworking booth today, so I made a wooden coaster! Apparently the act of using an iron to burn patterns into wood is called branding. #woodworking #startrek

This time I got RL working without doing behavioral cloning. It's extremely far from perfect, but this is far better than what I've gotten before! The key ingredient: being very careful with reward design. #robotics #quadruped #reinforcementlearning

Alright, I think I'm seeing signs of life for making my robot learn to walk. It started with a behavior cloned walking gait (cloning a manually constructed policy) and then using PPO RL algorithm to fine tune it further. #robotics #reinforcementlearning

Damn, why is my robot not learning! #reinforcementlearning #robotics

Hot take: Ubuntu should drop the non-LTS variants. Ever since they dropped the support period from 18 to 9 months for those variants it's really feels, as a developer, wasteful to make packages for those, as that effort will just go down the drain in a few months. #linux

Nothing changes on New Year's Day.

Game is done: MegaHulk! This was made for a (longish) gamejam about 120 hours of dev time. I made all the graphics and music, most of the code (tiny bit of AI autocomplete). Fonts and sounds are not mine. A nice little game, I think! siegelord.itch.io/megahulk #gamedev #solodev

#KrampusHack #gamejam is over, but I can't stop developing my game. I ran out of time for polish, and I want to give it a proper chance! I tried using JFK's speech for robot noises, but settled on bird calls instead. #gamedev #solodev #foley

3 days left in the KrampusHack gamejam. Core gameplay complete! Just need more lots content. Tomorrow I'm composing some sound tracks and doing a lot of 3D modeling. #gamedev #krampushack #gamejam

Explosions and infighting! This required adding a second forward pass to my deferred renderer to handle transparencies. #gamedev #solodev #krampushack

In my new game you are a robot that punches robots. #gamedev #lowpoly #krampushack

The corrupt, criminal memory industry is at it again - www.youtube.com/watch?v=9A-e...

1 day until KrampusHack, the secret santa gamejam. My wishlist for my secret santa are: - Color cycling - Vehicles. Like racing games or vehicular combat - Portals. Not just teleporters, but maybe looking/shooting through them or simulation of the curved space in a wormhole #gamedev #gamejam

ZMP is kicking my butt. #robotics

Allegro 5.2.11.1 is released! This fixes some regressions in Allegro 5.2.11. Whoops! Read the full announcement for more details: liballeg.org #gamedev #allegro5

Allegro 5.2.11 is released! Some highlighted features include a new joystick (gamepad) system (based on the community SDL controller database) as well as initial support for OpenGL 3+ on MacOS. Read the full announcement for more details: liballeg.org #gamedev

Cleaned the prototypes for my Crash Bandicoot 2 themed gauges I made a few years back. The top are the gauge housing, derived from the warp room doors (they're suns with open mouths). The bottom are the decorative faces common to the first two Crash games. #3dprinting #crash #crashbandicoot

Did you know that you can run www.byobu.org on MSYS2 on Windows without too much trouble? It's not advertised anywhere, but the only changes I had to make was to disable the usage of the "route" command, which doesn't exist on MSYS2. #tmux #byobu #msys2 #linux

Anyone make seitan Russian kotleti? Would you make seitan first, crumble it and then follow the a usual meat-based recipe with a substitution, or would you mix in the non-meat ingredients with the dough and steam + fry? Any tips? #vegetarian #vegan #seitan #kotleti #cooking

Continuing our drive to rate the classics, here are two maximally LA-coded suburban DAGs from Judea Pearl. There's thirsty lawns and sprinklers, burglars and earthquakes, and neighbors who call you if your alarm goes off. 9/10 because there's no mention of the traffic.

Made a infinite mirror for a glass dinner table. It uses a broken down Hyperspace HyperCube mirrors/LED strips/controller + a 3D printed/painted housing of my own design. Powered by 2 18650 lithium cells. It is mounted under the table. I think it came out pretty well! #diy #led #electronics

In less than a month I'll be doing a secret-santa game jam, KrampusHack! You make 3 wishes and a random participant is assigned to make a game for you. The jam is very small, so it's feasible to play everyone's games. It runs from Dec 1 to Dec 25. Join us at tins.amarillion.org! #gamejam #gamedev

My balance controller seems to be messed up, but at least the moves are good. #robotics #dance

funky

I hate supporting #MacOS. I was debugging why my gamepad was not working. Turns out, it was returning axes in the wrong order (see last three): kHIDUsage_GD_X kHIDUsage_GD_Y kHIDUsage_GD_Z kHIDUsage_GD_Rz kHIDUsage_GD_Rx kHIDUsage_GD_Ry Why do I need to mess with HID to use a controller? #gamedev

Did you know that small cameras have a dedicated filter to block out IR? I removed the lens from a cheap webcam I use for my robot to be able to measure the sensor, so I could buy a better lens. The reflecting red square is that filter, and it can be easily removed. #robotics

What is a #3dprinter for? Making crappy versions of everyday consumer products! (I forgot to add any allowance for grip)

Just saw on IG that Drew Struzan has died. RIP to the man who painted my childhood.

Set up a persistent air quality etc monitoring. I'm using the #airgradient air quality meter which is polled by small Python script running on a #RaspberryPI Zero W. Data is stored in sqlite and displayed using #grafana. It was a pain to get a version of it that worked on the ancient processor!

I bought an #airgradient a few years back, and finally decided to try its online capability. But, turns out it was so old it was no longer well supported! However, since the firmware is open source I managed to hack around it and get things working to my liking. I'm living out the Stallman ideal.

My robot is now wireless! There is a Python HTTP server running on the Raspberry Pi receiving control signals from a PC that has a controller connected to it. In the future, I will rewrite the server in Rust for speed, and switch to autonomous control. #robotics #rust #raspberrypi #diy

My first perfboard circuit. In retrospect, I should have used a stripboard, bending and soldering the little wires was a huge pain. This is part of the controller for my robot, a hat on top of a #raspberrypi 3B+ #electronics

Designing a perfboard layout in #inkscape. It works okay, but surely there's a dedicated software I could use. Is #fritzing any good? I need to distinguish between the top and bottom sides of the board for the connecting wires. #electronics

Tomorrow I'll be speaking at @devoxx.com about i18n-puzzles.com. Wish me luck! m.devoxx.com/events/dvbe2...

Visited the @lickobservatory.bsky.social today. Saw a very cool 3m equatorial mount Shane reflector. It turns out they can swap the spider + ring to be able to use the primary/cassegrain/coudé focuses, and apparently it only takes half a day to do so! Wild! #astronomy, #telescope

Why am I so bad at soldering!? Not a single one that's acceptable! I used so much flux too! #electronics #raspberrypi

Managed to encode my quadruped robot into #mujoco, a research grade physics engine. Hopefully this will make my RL experiments go better. I used github.com/Balint-H/ble... to make specifying the model relatively easy, since I used #blender to actually design the robot. #robotics

Another mod for Transcendence: Garnet gunship. This was one of the first models I made since learning Blender properly. #blender #scifi

Condition numbers for HMC and the funnel statmodeling.stat.columbia.edu/2025/09/18/c...

Prototype for the new foot for my quadruped robot. This using an RC car shock, and a hiking pole tip as the footpad. That turned out to be too hard, so I'll be making a custom one from silicone. The goal is to have something that's not bouncy, but soft enough to protect the servos. #robotics

WGA Statement on ABC’s Decision to Pull Jimmy Kimmel Live!

Screenshot of a space station mod (I made the graphics + scripts) for Transcendence, an indie space roguelike, some years ago. #indie #scifi #blender

So the trick to a more stable walking gait was to reduce how high the feet were lifted. I have a new design for feet in mind, but otherwise the next step is to untether the robot with onboard power and microcontroller! #robotics