teepee changed the topic of #openscad to: OpenSCAD - The Programmers Solid 3D CAD Modeller | This channel is logged! | https://openscad.org/advent-calendar-2021/ | Website: http://www.openscad.org/ | FAQ: https://goo.gl/pcT7y3 | Request features / report bugs: https://goo.gl/lj0JRI | Tutorial: https://bit.ly/37P6z0B | Books: https://bit.ly/3xlLcQq | FOSDEM 2020: https://bit.ly/35xZGy6 | Logs: https://bit.ly/32MfbH5
<peeps> yep hull works for 2D and 3D objects
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<ccox> yeah, I have to agree - you're not going to make day 22 printable very easily.
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<InPhase> ccox: :)
<InPhase> lf94: And I want to see the curv3d implementation of Day 22. :)
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<lf94> lol
<lf94> for you only ;)
<lf94> I guess it's out, lemme see.
<lf94> looks like just a bunch of unions
<lf94> this might be expressible as some weird fractal
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<lf94> I see the challenges got much harder
<lf94> pen rose looks crazy
<lf94> tree too
<gbruno> [github] thehans closed issue #4025 (Unable extrude 3D shapes). https://github.com/openscad/openscad/issues/4025
<InPhase> lf94: Neuron has been the one I've been waiting for since you started on the quest, but I figured you might give up before getting there.
<ccox> good luck modeling the tree in intersection mode, much less printing it (unless you have a J750, or Mimaki printer).
<InPhase> This year's tree is super easy to print compared to the 2019 tree.
<InPhase> You could toss some supports on there and it'd work out okay.
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<lf94> Neuron would be easier if I had union powers
<gbruno> [github] thehans closed issue #4024 (CGAL error in large render). https://github.com/openscad/openscad/issues/4024
<InPhase> lf94: I bet Inigo Quilez would do it in 5 lines with some really clever modulos.
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<lf94> InPhase go challenge him X)
<lf94> He answers his emails.
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<InPhase> :)
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<Jack21> (50%)
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<peeps[zen]> lf94, InPhase: No wizards allowed, its unfair! (unless he wants to help us fix OpenSCAD's internal shader code :P )
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<gbruno> [github] t-paul pushed 1 modifications (Update info boxes.). https://github.com/openscad/openscad.github.com/commit/c2638c21fc1c0376edb9724f97ae55e0c65a6cac
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<InPhase> Jack21: The translucency on that is very nice. :)
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<Jack21> inphase  it is a blue metallic ..so  only  because  it is thin
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<Jack21> just got a user make from day 16 - the first where  i know he used the script and not just the 3mf .. https://media.prusaprinters.org/media/comment_images/de/f73caa-0ec8-42f5-859e-2d94af5548ea/thumbs/cover/640x480/jpg/disk1.webp
<teepee> that looks great
<Jack21> yeah i am amazed he could print it - Ü
<InPhase> It's an upscale dream catcher.
<Jack21> i think it is near 20cm diameter  (just guessing)
<teepee> hard to tell, but it certainly looks big
<Jack21> the script standard setting is radius 100  so if he  doesn't changed it
<gbruno> [github] t-paul pushed 7 modifications (Merge pull request #3901 from openscad/extend-autocomplete
<teepee> ok, lets see how the use/include autocomplete works :)
<teepee> unfortunately it I can't get absolute path to work
<Jack21> it sounds very nice
<teepee> it's not perfect, but the current autocomplete inside use/include is totally useless
<InPhase> Oh right. I never finished making that use optimization PR. I should look back at that over the winter break.
<teepee> if you find a way to improve this, that would be great
<teepee> I could not find a way to get the autocomplete trigger in some cases which is an annoying limitation
<teepee> the current code looks only relative against the library path + current folder so it should cover at least some reasonable cases
<InPhase> Removing extra calculations with no effect other than some echos is totally possible. And because of the echo side-effect I have a test-case for success. I just need the time to finish tracking it down.
<teepee> now I think I missed part of the disucssion :)
<InPhase> I'm not talking about what you're talking about. :)
<InPhase> Just you mentioning use/include reminded me.
<teepee> yeah, that I figured now :)
<teepee> but unintentional reminders are good anyway :P
<InPhase> I wanted to purge the computational overhead on use that makes BOSL2 avoid it entirely.
<teepee> ahh, that one, yes, that would be awesome
<InPhase> The thing where we repeatedly recalculate all the constants.
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<pa> hi folks
<pa> noob question: i defined a module, clipZPositive(), that does intersection() { translate([0,0,500]) cube([1000, 1000, 1000], center = true); children();}
<pa> when i use it, in preview mode it glitches always
<pa> like showing the bottom half instead
<pa> With F6 instead, it looks ok. However, if i don't use it, and i do the intersection with the cube instead, preview is fine
<pa> what am i doing wrong?
<peepsalot> that's a known limitation of preview mode. if the camera is within bounds of intersected/differenced objects, then it causes problems
<peepsalot> one workaround is to use orthographic view, as opposed to projection
<pa> peepsalot: ok, but why then it looks fine if i don't use the module, but rather what's inside?
<pa> ah no wait, you are right, it glitches with that too
<pa> sorry
<peepsalot> as opposed to *perspective* i meant to say
<pa> so one workaround is to reduce the clipper size, right?
<peepsalot> yes that too
<pa> thanks
<Jack21> pa there are some possibilities to imitate this by choosing a smaller cube
<Jack21> i am defining the cube via calculated viewing area ( dependent $vpd viewing distance) in preview and only for render the cube gets full size to ensure
<Jack21> that also limit the zoom out when hitting view all
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<peeps[win]> stupid power outages
<peeps[win]> i should really get a UPS
<peeps[win]> power went down for literally 1 second
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<peepsalot> ...ok that was longer than 1 second
<peepsalot> on the bright side i've performed my roughly annual lawn mowing
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<InPhase> peepsalot: Now instead of a UPS you need to buy solar panels and a lithium battery pack for the basement.
<peepsalot> haha, basement, funny. you obviously have never lived in texas
<InPhase> and a lithium battery pack for your oil well.
<peepsalot> ok, fine, but its called an oil derrick :P
<teepee> lawn mower with built-in generator?
<peepsalot> sure, a magneto is sort of a generator
<InPhase> teepee: I looked into that, but the alternators on those things are pretty low current, and not great for strapping to an inverter.
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<teepee> ...shouting from inside the house... mow quicker, the lights going dim!!!
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<InPhase> The best thing I ever owned with a side utility of being a generator was my former Prius. That was like a generator but much more efficient, and had an alternator sufficient to run a 1000W inverter..
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<peepsalot> the true texan way would be a PTO generator to attach to your tractor or heavy duty pickup truck. sadly i don't have any of those
<peepsalot> but in case it wasn't obvious or teepee wasn't joking, its all mostly gas(petrol) mowers around here
<peepsalot> i actually had a rechargeable battery powered mower for a while, but the batteries were not good enough to cover front and back yard in a charge
<teepee> I was, but if it gives you ideas, I'm good with that too :)
<peepsalot> wasn't sure if gas mowers are banned in euro land or something
<InPhase> peepsalot: Yeah, the battery ones didn't work for me until I moved closer to the city and got a smaller yard.
<peepsalot> i even tried a push reel for a time, but as soon as you let the grass grow a little too high, then its basically worthless. it just rolls over without cutting
<InPhase> Same.
<InPhase> It's a nice concept that doesn't work without pristine yard conditions.
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<InPhase> When there weren't sticks or other hard fallen objects lurking in the grass, I did really appreciate the push reel mowers. They're quiet, not really too much work, and just about right for some good exercise.
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<pa> ups ftw
<pa> used they cost literally nothing
<pa> that is, you can likely find them for free
<pa> and plug a car battery :D
<ccox> used, means replacing the batteries - which is the most expensive part.
<pa> like https://i.imgur.com/22TtYyc.jpg , but i wanted really long coverage
<ccox> ouch. Also, the charger built into it probably isn't designed for car batteries.
<pa> it's 12v, should work
<ccox> lead acid liquid open vented, versus lead gelled acid sealed.
<ccox> Not exactly safe.
<pa> afaik agm batteries are also seale
<pa> d
<pa> plus, being still, i doubt they would incur in big risks. Considering my ups is a 650VA, and these batteries are able to sustain over 1000A peaks, i'm not worrying :)
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<ali1234> petrol mowers are just really uncommon for homeowners in the UK at least. we have tiny gardens and petrol kills grass.
<ali1234> mowing with extension cables was common until a few years ago. now battery mowers are becoming more common
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<ali1234> in fact mowing with extension cables was so common that there used to be public safety messages about not running over the cable and/or using an RCD