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<Guest36>
I'm using openSCAD to convert a DEM to a 3d printable STL. I also want to trim the DEM coverage to specific lat/lon dimensions and add some circular holes in it so I can mark important sites on the final model with small flags. My problem is that the DEM is fairly high resolution, so the OpenSCAD client is becoming completely unwieldy to deal with
<Guest36>
it. At the moment, I'm trying to render just the raw DEM, then save it as an STL so I can load it as an STL and work on it to cut it down to the lat/lon I need and so forth, but after rendering the model, I can't open the menus in top left or use f7 hotkey to export to STL, the interface is just unresponsive. Any ideas on how I can proceed?
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<Guest36>
conveniently, I have the DEM in MATLAB, and I've exported downsampled versions of it that don't completely slow down OpenSCAD. I want to use the full resolution DEM that I have for the final model, though. I could start trimming the lat/lon in that environment before trying to render it in OpenSCAD I suppose, but I don't anticipate a huge reduction
<Guest36>
in the size of the DEM I am trying to render.
<J1A84100>
DEM?
<J1A84100>
try using the 2022 version (nightly dev snapshot)
<Guest36>
DEM = digital elevation map. I'm using surf on a file with 2000x2000 points
<J1A84100>
ah using surface module?
<Guest36>
surface(file = "DEM_trimmed.txt", center = false, convexity = 5); is the command I am using
<Guest36>
with a scale command as well (I should probably ditch this to just render the STL and then import that STL back into OpenScad?)
<J1A84100>
as said try a more current version - there is also a feature "fast csg" in preferences you may benefit from
<InPhase>
2000x2000 is a pretty beastly surface render. fast-csg in the nightly build would be a huge help.
<InPhase>
Guest36: While the interface is not responsive is your cpu running at 100%?
<InPhase>
Guest36: Because it's probably just taking an awkwardly long time to calculate it.
<J1A84100>
(there might be some calculation after the render bar finished)
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<InPhase>
I wish there were some way to figure out where thingiverse activity comes from. There have been zero remixes of my hair comb posts for about 2 years, then suddenly about 15 correction, 16 while I was typing, of them in the last 24 or so hours.
<buZz>
hehe
<buZz>
InPhase: suddenly everyone grew hair!
<InPhase>
Someone or something prominent must have linked to it or something, but I have no clue where.
<InPhase>
Both the adult sized and the baby sized ones are getting activity at the same time, but none of my other designs are matching, so it's not some change in thingiverse activity in general.
<InPhase>
A google search for links shows links, but none of them new.
<Scopeuk>
InPhase yeh its weird like that
<Scopeuk>
I only have one design up (learning how to use customizer through it) it did nothing for an age then suddenly got a bunch of interest for a week before dropping away
<Scopeuk>
someone tried sending me money on it, I assumed it was a scam and ignored it
<othx>
Scopeuk linked to "Square spiral bed leveling aid by scopeuk" on thingiverse => 1 IRC mentions
<buZz>
InPhase: could be they made a workshop that found your object
<buZz>
and picked it as topic
<buZz>
i noticed there's a bunch of classes to learn openscad in maker/hackerspaces in .nl
<Friithian>
that spiral is an odd thing to gain any amount of traction
<buZz>
:)
<buZz>
trivial designs aid to learning
<Friithian>
I guess so
<Scopeuk>
Friithian yeh, every once in a while it goes through a couple of weeks of getting picked up. I dare say if I looked at it now I would determine its rubbish and go about it a different way. I consider it functional but near valueless
<buZz>
they removed the 'featured' flag from my 2012 design :( :(
<othx>
buZz linked to "Netipot by buZztiaan" on thingiverse => 2 IRC mentions
<buZz>
one of my first ever openscad designs :P
<InPhase>
buZz: I suppose that could be. That would explain the rate of activity. If it's a workshop then I guess the activity disappears in a day as they move on. ;)
<buZz>
-or- its a repeated curriculum ;)
<InPhase>
Scopeuk: The "tried to send money" is sometimes a misclick on the tip button. If it's not setup, you'll get an email that they tried, even if they didn't really intend to follow through on their misclick.
<InPhase>
Scopeuk: I know this because I misclicked on a random one once.
<InPhase>
However! I did get a random $2 tip once after actually setting it up. Only once, and only $2, out of many designs. I estimate I would need to post on the scale of 2 million designs to even get into the ballpark of making a living out of the tips. ;)
<InPhase>
buZz: Hahah. That's a very boxy netipot. Build for square nostrils, I see.
<buZz>
InPhase: hehe, i didnt know a lot about 3d design at the time, was just a fun exercise
<buZz>
got featured on frontpage for years
<buZz>
:P
<InPhase>
I guess 2012 was a different era. :)
<InPhase>
You should probably retitle it "Minecraft Netipot" and maybe you'll get some new activity.
<InPhase>
I've done the netipot thing back when I had some chronic sinus inflammation for a stretch. But I was really diligent about boiling the water for sterilization and sterilizing the container with the hot water as well.
<InPhase>
I suppose that's not so viable with thermoplastics.
<buZz>
lol
<buZz>
i do netipot all the time
<buZz>
and pouring 100C water into your nose is HIGHLY advised against
<buZz>
lol
<InPhase>
Well there is a critical unmentioned "let it cool then" step in there...
<buZz>
i live in western europe, no bacteria in the waterpipes here
<InPhase>
I live in the U.S. Ostensibly no bacteria in the waterpipes, but you never know when something has gone wrong in your piping or your faucet, and I can guarantee there's no bacteria in boiled water.
<buZz>
US is the land where they put combustable fuel in drinking water, right?
<buZz>
our city has its own aquifer, no companies allowed access (beside the watercompany), its so very clean that i've often tried to find a cheap way to bottle & sell it on ebay ;)
<Friithian>
the water I have back home when unfiltered has unsafe levels of arsnic in it :D
<J1A84>
today you have PFOA PFOS PFAS in your water .. everywhere
<buZz>
J1A84: dont you mean PTFE
<buZz>
why avoid the name :P
<buZz>
you have PTFE in -your blood- from birth
<buZz>
even while in the womb
<J1A84>
PTFE is not a problem
<buZz>
THANKS DUPONT
<buZz>
J1A84: yes it is
<Friithian>
here at uni I have to have a water filter so the water don't taste like chemicals
<buZz>
J1A84: it literally makes vaccins work less well on your body
<buZz>
plus cause cancer
<J1A84>
no the chemicals to produce PTFE are
<buZz>
J1A84: the materials you named are just PTFE alternatives
<buZz>
since PTFE got labelled toxic, many people dont want 'teflon antistick pans' anymore
<buZz>
so they made alternatives
<buZz>
which are just as cancerous :D THANKS DUPONT
<buZz>
dupont even knew from the 60s about ptfe cancer :P
<buZz>
PTFE is 'a PFAS' according to dupont nowadays ;P
<buZz>
and 'we dont use PFOA to produce PTFE anymore!' after they knew for as long as they produced it that it murders people
<buZz>
yay!
<buZz>
> paid an additional $671 million to the 3,535 West Virginians who filed personal injury lawsuits
<buZz>
damn son
<buZz>
O_O wtf The movie is based on a true story and a lot of details are correct (here’s the New York Times Magazine feature it’s based on). DuPont workers did, in fact, get sick after volunteering to smoke Teflon-laced cigarettes to test of the chemical’s effects. And two of seven pregnant employees working with Teflon did have children with eye defects. DuPont kept these cases and decades of studies on
<buZz>
laboratory animals out of public hands for years.
<buZz>
> Of concern to our industry is that all PFAS chemicals, of which there are more than 4,500, will be lumped together along with a valve industry mainstay, polytetrafluorethylene (PTFE). If this occurs the valve industry would have to find an effective replacement for most floating ball valve seats, many gaskets and seals, as well as components that make fugitive emissions packings effective.
<buZz>
PTFE -is- a PFAS , PFAS is a collection name for all the '
<buZz>
PTFE -is- a PFAS , PFAS is a collection name for all the 'non-stick teflon materials'
<buZz>
TLDR: marketing department of DuPont is really influencial
<J1A84>
buZz if you read your text again you noticed that it says that PTFE is not a PFAS but they fear they could "lump it together with PFAS"
<buZz>
right, because it is, thats written by PTFE producing industry
<buZz>
> PTFE is by far the most popular one in the group; it makes up approximately half the market.
<buZz>
The fact that PTFE is a polymer makes it different from other chemicals in the PFAS family. Many well-known PFAS, like PFOA, only consist of seven to fourteen carbon atoms, and others have even less than seven. In comparison to PTFE, most other PFAS are short chained.
<J1A84>
They are very similar so the difference is only at the end of the fluor carbon chain and they changed the definition.
<buZz>
changing the definition out of marketing need, isnt something you need to pay attention to
<J1A84>
»The definition of PFAS used in this restriction includes fluoropolymers, such as PTFE.«
<buZz>
i mean, its great US is still producing -something- , but this paints a bad picture :P
<J1A84>
it is the other way around they changed it to include PTFE
<J1A84>
(in EUrope)
<buZz>
whatever way you want to twist yourself, PTFE -is- a Poly- and Perfluoroalkyl Substance
<buZz>
lol, yes, the US lobbypolitics strike hard :P
<buZz>
lets ignore the 700M dupont paid to just ~3000 people for exposure to PTFE :P
<J1A84>
you already posted that PTFE is different to other PFAS .. so it clearly is different. Still as said they all have F and C chained but the ending of those chains is what determine their properties
<buZz>
yes, PFAS encompasses almost 5000 materials
<buZz>
1 of them is over 50% of all PFAS produced
<buZz>
we call it PTFE
<J1A84>
yeah lets call it all plastic
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<InPhase>
JordanBrown: My initial motivation for adding the binary export for stl was exactly the file size issue. Thingiverse was getting hard to work with, and github was the only prominent looking alternative. Except github has a 100MB file size limit, and I have stl files greater than 100MB. e.g., this ceiling light cover: https://www.thingiverse.com/thing:3024518/files
<othx>
InPhase linked to "Ceiling Light Cover / Ceiling Lamp Globe by rcolyer" on thingiverse => 4 IRC mentions
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<InPhase>
I figured as we keep driving the efficiency of the program up, it's kind of important we keep the file sizes reasonable so sharing can still work right.
<InPhase>
And to that issue's topic, I did in fact initially make it the default for command line as well, but someone (I think maybe nophead?) objected on the basis of scripts that expected ascii, so the differing defaults and the deprecation note in the --help was born.
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<InPhase>
So now probably that note will live on for many more years until someone decides people have had enough time to follow its instructions. :)
<dalias>
i wish folks wouldn't commit STLs to git tho. same principle as all large derived artifacts
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<dalias>
they can be published as CI artifacts AIUI, or in a separate repo that uses the source repo as a submodule
<dalias>
i hate going to clone something and being unable because it has GBs of binary artifacts committed that nobody asked for