Connected line sweep shadow computation to the terrain renderer. Lots of minor issues, but it could be worse.

chiral aperiodic monotiles go brrr

Far from a state of the art sort of method, but a post about using 1D scanlines to track horizon visibility and shade heightfield terrain with soft shadows and ambient occlusion. rreusser.github.io/notebooks/li...

Anyone have an e-reader they like? Amazon will stop supporting library books on my 16 year old Kindle, and I'd like a replacement for an upcoming trip. I hate that tech is disposable, but 16 years was a pretty good run. Main constraint is that I'll pay extra to avoid ad-supported awfulness.

Retiring a climbing rope and didn’t want to throw it out. Didn’t like the first attempt so redid with a more interesting pattern. The initial pattern was the hard part, feeding rope into it (still needs adjustment) is the tedious part.

Significantly more work than I expected, tbh. Tempted to loosen up the pattern and give it some breathing room—but it's just so much work to feed all the rope through to adjust the pattern.

Post a pic you took, no context, to bring some zen to the feed

Got a $25 Peet’s gift card as a result of one of those data breaches, and I’m feeling, basically, just really good about croissants right now.

Nice, figured out how to fetch some Arctic DEM data, fill in the gaps with Copernicus GLO-30, run it through rio-tiler, and connect a WebGPU viewer with some basic level of detail refinement.

My fullerene simulator for designing toilet paper tube constructions is still one of my favorites. Try it in its new home as an @observablehq.com Notebook Kit notebook! 🧻🧻🧻 rreusser.github.io/notebooks/ch...

Threw WebGPU at some data from Sloan Digital Sky Survey. No real content here, but gosh it's satisfying to visualize. (Hope I didn't get any details wrong!) rreusser.github.io/notebooks/vi...

I miss fluids.

Okay, here's v1.0.1 of webgpu-instanced-lines. github.com/rreusser/web...

Still WIP, but *finally* adapted my line rendering module to WebGPU. Managed to salvage pretty much all of the logic from my old WebGL line rendering module. I know there's better algorithms and implementations out there, but I'm relatively content. rreusser.github.io/notebooks/we...

Made a MCP server to control @observablehq.com Notebook Kit notebooks in the browser… Can interact with the runtime, but pictured here is it interacting with the notebook via the DOM. With event log! Look, AI is full of problems/evil/waste, but this is really something. github.com/rreusser/mcp...

A magnetic pendulum simulation, as I've been slowly polishing and moving some @observablehq.com notebooks from the web editor over to blog posts. Observable Notebook Kit is such a joy to use. rreusser.github.io/notebooks/ch...

We ❤️ this Observable Notebook from @rreusser.bsky.social exploring yoga class attendance, with calendars and charts made with Observable Plot! Read Ricky's reflections, and see how they use a notebook import to repurpose an existing Plot component: buff.ly/nRync53

I was fine with it not arriving until after Christmas. I was worried 111 pieces wouldn’t be enough. I was worried it be sorta trivial with no wrong answers. @nervo.us your Spectre tile puzzle has exceeded all expectations! My mother in law is thoroughly nerd-sniped.

Phew, altitude PR and probably the most incredible view I’ve seen from a mountain. 🌋🦙 #cotopaxi #volcano #ecuador #mountaineering

Every now and then I find an album I can listen to endlessly on repeat, and right now it’s Paul-Marie Barbier’s Solo on the Side. m.youtube.com/watch?v=Q4Lu...

OMG hummingbirds

Can you believe that back in the day the recommended solution was not just to shut it down and turn it back on again, but to actually drop the entire thing six inches onto a hard surface in the hope that loose senators would reseat themselves?

Wow, @observablehq.com's new Notebooks 2.0 seems really, really good. An offline editor app, a pleasantly-human-readable notebook format, and had no trouble integrating it into my website here: rreusser.github.io/notebooks/he...

I'm in the phase of my programming career where I've figured out how to write a simple-enough recursive descent parser, and suddenly everything looks like a parsing problem.

Turn on the sound — this is how nearly every night sounds for me and my family. Imagine getting used to that, living, working, raising kids. A lesson the world didn’t learn from WW2: when you tolerate and appease evil, it grows stronger, and you won’t notice until it reaches your home.

Expanded it to work across an array of satellite tiles and added soft shadows. Softening shadows around the azimuth is easy because you just average samples (here, 16), and along the altitude is even easier because the horizon algorithm gives enough information to simply do a smooth fade.

A 24-hour loop of summer solstice sun rising over Mount Adams, Washington, USA. Not terribly user-friendly, but you can select a region and encode a loop here: observablehq.com/@rreusser/li...

Relatively pleased with this development.

Halfway through a week of looking after our neighbor’s cat and have discovered: I appear to be allergic to cats.

Pretty good turnout! #nokings

🎵 2 weeks ago, me and my band Obiymy Doschu have released “Vidrada”, our new album, passionately crafted in Kyiv for 7 years. I've never been more invested in a project, and will be proud of it for the rest of my life. All my love, dreams, hopes and worries in one record. ⬇️

Made a quick page for sharing/browsing Mapbox maps. Has a screenshot button, a style selector, a share link, and can add to homescreen, if that's your thing. E.g. an excellent boat wake 🚢: rreusser.github.io/maps/box-o-m...

If you write “Voight–Kampff” instead of “Voight-Kampff” you’re a LLM.

Omg, 😍. “This is a site for pictures of owls… in towels.” owlsintowels.org

@vtcraghead.bsky.social 2*arcsin(1/3). Nice.

Happened to stay up late and catch Sam Watson (spoiler alert) setting two speed climbing world records last night! Made a quick plot of the world record progression, and if we can simply extrapolate this, then it looks reasonable to expect more. So fast. #climbing observablehq.com/@rreusser/sp...

A photo from a recent trip to Wadi Rum, Jordan. Still in absolute awe of the place. Absolutely excellent climbing, plenty of interesting fauna, and the people were extremely friendly (and confused about what's going on in the US). (full disclosure: photo has been slightly edited.)

Alright, fixed the ad hoc lighting computation for my terrain shading, I think. Always tricky to balance good appearance and good controllability. Try it live here: observablehq.com/@rreusser/li...

The sun rising over Thor Peak, Auyuittuq National Park, Canada. It's using line sweep horizon tracking to compute ambient occlusion and physically accurate shadows together with relief shading, all packed into an RGBA texture. Pretty happy with the scanline algorithm, but the shading needs work.

A more modest Trains and Trails run this week through Briones Regional Park. 14 miles and just over 3 hours from door to door. Already can't wait to go back. ☀️🏃‍♂️🐄 rreusser.github.io/trains-and-t... #running #trailrunning

Please help my mug did a topology

I've put a lot of work into the template for my running blog site. Not looking for congratulations, just genuinely curious: if I took the time to clean up the rough edges and turn it into a proper authoring tool, is that a thing literally anyone would use/want? rreusser.github.io/trains-and-t...

New Trains and Trails! From Lagunitas, toward Point Reyes National Seashore, then back down the ridge to Stinson Beach. And a Dipsea. A pretty intense day by the end, but I'm going to call this the best route I've run in the Bay Area. Oh my gosh it was lovely. 🌲🥰🌲 rreusser.github.io/trains-and-t...

When I finally open my bakery, its name will be “Pas de Pain, Pas de Gain.”

Sometimes you're goofing off and stumble upon someone's little corner of the web, and something really wows you, and the next thing you know it's three hours later and oh no I think I was supposed to pick a kid up from school. (On here as @rreusser.bsky.social)

Antioch to Mount Diablo, my first Trains and Trails addition in over a year. 27.5 miles, 5 hours 20 minutes, 5400 feet up/5100 feet down. Rough day overall, but always nice to get out there. 👏 rreusser.github.io/trains-and-t...

Yay, a long run up Mount Diablo, in accordance with my tradition of putting myself in a distressed post-long-run stupor so that I can enjoy the game! (File photo ⛰️)

Top comment on the recent NYT story on DOGE’s young aides www.nytimes.com/shared/comme...

LOL a slow, downhill, trail 2 mile PR, thanks Strava. strava.app.link/sJQ2SbAjfQb