gtewallace
Craig S. KaplanIn my online undergraduate P5.js course, students are about to begin the module on motion and physics, including a bit of physics simulation using Matter.js. It suddenly occurred to me that I had never seen anybody put together this particular demo before, and I realized it had to be done. Messy source code at https://editor.p5js.org/isohedral/full/vJa5RiZWs.
Christopher Batty@csk love it
bazzargh@csk so... https://nesbitt.io/xkcd-2347/ it's slightly different in that it's not the original - though it is matter.js. It took me hitting the button twice to realise what was going on - it recreates the cartoon for random real projects. I like it all tho; I did xkcd 208 for advent of code a couple of years back https://hachyderm.io/@bazzargh/113622743090408785 (...with entirely unrealistic physics)
@csk also, recently I said I'd been nerdsniped and one of my younger colleagues asked what I meant; I dropped a link to https://xkcd.com/356/ and then realised it's *19 years old* (so is the "I know regular expressions" one)...so came out before he could read...how did we get so old? A warning for showing this to students ;)
Anne Geese
Earthshine
Josh Bressers
Carsten Bach
GeePawHill@csk *Beautiful* work!
Introscopia@csk I gave it a try last year!
https://social.coletivos.org/@Introscopia/113799812434831228
powered by chipmunk physics!
https://social.coletivos.org/@Introscopia/113799812434831228
powered by chipmunk physics!
Introscopia (@[email protected])
Attached: 1 image Inspired by a bluesky user who posted this classic XKCD without the nebraskan block and the simple caption "2025"..... let's hope not!
Christian Waidner@csk This is what the Internet was made for
Arnim Sommer 🇪🇺@csk
But why shove it out left?
But why shove it out left?
Anand Philip@csk this is excellent!
jfk
Mer-fOKxTOwl@csk i like how there seems to be no friction and despite what block you klick, after some duration everything crumbles, even if you do not move the cursor while klicking.
refraction 
Colin@csk @creideiki what it looks like after the "move fast and break things" folks have their way with it.
Marcus Rohrmoser 🌻
Simon Brooke
David Cooper@csk I've just spent entirely too much of my day destroying this tower and refreshing the page. Thank you, you win the internet for today!
Malcolm Herbert@csk tbh I didn't realise that this was a simulation until I spied the 'gif' button there and ... holy smokes ... awesome ... :)
Mathias Panzenböck@csk Register the mousemove handler on the window object, then you will get the events even when the mouse moves out of the window/frame while dragging.
@bloody_albatross If we're talking about improving the code, then I'd be more interested in the question of how to get a stable tower to stand up in a physics sim without bouncing all over the place and collapsing spontaneously. In this demo I use a cheap hack of freezing all the blocks until you actually click on one of them. Presumably it's really hard to get this working correctly (cc @topher_batty)
@csk @topher_batty I feel like that is basically what all games do anyway. Also saves CPU.
@bloody_albatross @csk Paul Kry even had a paper where they sort of generalize the freezing idea to merging together collections of rigid bodies whose relative motion is small enough. https://eulaliecoevoet.github.io/AdaptiveMerging/
@bloody_albatross @csk I'm not sure of the latest and greatest in academic rigid body stacking, but I've used Danny Kaufman's 2008 staggered projections scheme successfully for one paper: https://www.cs.ubc.ca/labs/sensorimotor/projects/sp_sigasia08/KSJP08.pdf Downside is you usually need to start bringing in better LCP or QP solvers.
{ id: d2718, ok: 🇵🇸🌈🏳️⚧️🇺🇦 }
TripTilt /// tt@csk
did it with blender and later even made a soundtrack
https://www.youtube.com/watch?v=T3s2JosdrNM
did it with blender and later even made a soundtrack
https://www.youtube.com/watch?v=T3s2JosdrNM
animated xkcd 2347 /// all modern digital infrastructure poked by Jia Tan on XZ Utils
Emil Persson@csk This needs to be made into an Angry Birds level.
rolandog@Humus @csk hmm, maybe turn it into an awareness-building game (a la tower defense games) where you must fend-off hackers trying to topple the whole tower over and whack knowledge into capitalists'/politicians' heads that treat the ecosystem as a black-box; boss level: secure funding without caving into three-letter agencies pressuring the dev to sneak vulnerabilities.
Noisecolor@csk
Brilliant 😀
Brilliant 😀
Ax=b
Elias Mårtenson@csk Sometimes I wonder if this isn't the right solution to the software problem.
robinhouston@csk Ha! I saw this on HN earlier, and didn’t realise it was you. Very nice.
@robinhouston Yeah, it's really making the rounds! I must tip my hat to the people who came over to show their earlier demos of the same idea -- it really was hard to believe that nobody had thought to do this before.
Daniel M Karlsson@csk Excellent work here.
Bredroll
Chuck@csk So you're saying if you shove aside the random person in Nebraska the architecture simplifies itself to something with fewer layers? 😆
demofox@ChuckMcManis @csk that took some real cajones chuck haha!
Greg Whitehead@csk Hah, just noticed that, if you click on the p5js link, it’s interactive! Awesome
michael
swachter
Chao-c'
Dadmin
Lena Schimmel@csk Wonderful!
I made your code even messier by introducing a small... let's say "typographic" improvement:
CynthesisTodayThis one has a lot of optional ways to destabilize the system. Pick up a tiny block from the top, don't drop it, and watch the instability move through the carefully balanced system-- over and over.
@lenaschimmel That's amazing, thanks!
Warrick Ball
EnigmaRotor
Bjørn Bäuchle@csk I love the idea, but it's unstable in its base config already. Just clicking into the image changes the setup.
netrom 
