teepee changed the topic of #openscad to: OpenSCAD - The Programmers Solid 3D CAD Modeller | This channel is logged! | 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
<InPhase> teepee: Hahah. Guest93 linked to having made an iris box last year, with the instagram post saying, "This work is inspired by Emmett Lalish's design of an Iris_box". I guess Guest93 didn't notice Emmett had used OpenSCAD. :)
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<teepee> InPhase: heh, I did not see that. well, I guess if you run off after looking at the pictures it's totally possible to miss there's also source available. It's not exactly the default to have access unfortunately
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<gbruno> [github] vinsdonz opened issue #4676 (The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron => union()) https://github.com/openscad/openscad/issues/4676
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<gbruno> [github] johnsonm opened issue #4677 (Difference in minkowski in manifold) https://github.com/openscad/openscad/issues/4677
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<guso78> What was the Compile Option to Compile without mimalloc ?
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<peeps[zen]> guso78: most of the build options can be seen at the top of CMakeLists.txt in this case you need to set USE_MIMALLOC=OFF
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<gbruno> [github] vinsdonz closed issue #4676 (The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron => union()) https://github.com/openscad/openscad/issues/4676
<lf94> bolt(...).taperXYZ(...) -> screw, amazing
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<jaredo> Is there any way to configure the light source?
<jaredo> I found a GitHub thread from 3 years ago but no answer
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<buZz> jaredo: afaik there's nothing like that
<buZz> you can export the models and render them in Blender or something
<jaredo> I thought about that but then all the bits get merged together. Maybe I’m best off just learning blender.
<buZz> openscad isnt for 'art' anyway ;)
<jaredo> Yeah I know
<buZz> whats the motivation for altering the lighting?
<jaredo> The problem I have is that every time I learn how to use blender, I forget it by the next time I need it
<jaredo> Openscad has been amazing in that regard. I can never forget how it works.
<buZz> but, whats the motivation? what are you trying to achieve with it
<jaredo> The motivation is that I’m not using openscad for its intended purpose - I’m modeling a space in my home and want to output a basic image.
<buZz> you want to output a -different- basic image ;)
<jaredo> The default lighting makes it really hard to see what’s going on sometimes.
<buZz> i'm sure that openscad model can make -something- :D
<buZz> jaredo: maybe just press ctrl+1 in the editor ;)
<buZz> it can make some models a lot clearer to see
<jaredo> What does that do?
<buZz> 'draw edges'
<jaredo> Ah. Yeah I tried that. It has some weird effects though.
<buZz> totes
<jaredo> It’s almost perfect
<jaredo> Maybe I am doing something wrong
<buZz> for just 'pretty renders' i usually just open meshlab
<jaredo> Part of my model has some angle iron pieces. To make the angle irons, I just difference two squares and then linear extrude.
<buZz> :)
<buZz> dont forget about color() btw
<buZz> you can add 'shading' with well chosen colors yourself, too
<jaredo> When I show edges, there are diagonal lines across the faces
<jaredo> I don’t understand why
<buZz> yeah, its showing the triangles
<buZz> its all triangles, no quads
<jaredo> Is there any way to stop that?
<buZz> eh, no
<jaredo> Bummer
<jaredo> Mesh lab looks like an option. I’ve never heard of this before.
<jaredo> Thanks for the suggestion
<buZz> yeah its a cool tool, ancient too
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<buZz> i'm designing a weird stackable connector for 'broomsticks' to build a greenhouse out of
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<buZz> can work for PVC pipes too :)
<buZz> well, greenhouse ... the frame of one :D
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<guso78> Great, i Like it.
<guso78> Whats the Diameter and printing time?
<guso78> How to you mount the horizontal edges of your Green House Cube?
<gbruno> [github] tiredtait closed issue #4662 (error while compiling with cgal) https://github.com/openscad/openscad/issues/4662
<guso78> this is sample output of the libfive successor
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<InPhase> buZz: You're absolutely going to want a chamfer there. Your design has fracture points.
<InPhase> buZz: When you have sharp right angles, the strain forces concentrate at those as something with weight applied flexes.
<InPhase> A smoother chamfer distributes the forces widely, and enormously increases strength.
<InPhase> It can end up multiple times stronger.
<pa> soft-pla vs tpu?
<InPhase> pa: Depends on what PLA variant I guess. There seem to be a pretty wide variety of those streaming out constantly.
<pa> i see.. I'm struggling a lot with tpu right now.. Projects that used to print just fine suddently started to underextrude and stop extruding at all after few layers, despite my repeated attempts to even clean the extruders
<pa> idk if it's the heat or wrong settings.. but would really like something soft but easier to print htan tpu
<pa> i even turned AC on lol but no luck
<pa> bloody ultimaker
<InPhase> pa: Most of the "soft PLA" videos I'm showing have a material that does not perfectly restore itself after deformation. TPU is pretty insistent about going back to its original shape.
<pa> umh.. that sounds a plus for TPU
<InPhase> Depends what you want, but yeah.
<InPhase> I'm still waiting for a material that could print a rubber band and have it behave appropriately like a rubber band.
<InPhase> Rubber bands do not, in fact, restore themselves to their original shape like TPU does. They have a bit of permissive floppy qualities, unless you stretch them.
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<InPhase> Maybe TPR filament is that material, but I haven't tried it.
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<buZz> InPhase: yeah there's gonna be more fillets and chamfers around
<buZz> its just product of 1 night of openscadding while binging TV dramas
<buZz> lol
<InPhase> Yeah, this TPR example shows a ball with about a 50% bounce recovery. That's pretty nice. https://www.youtube.com/watch?v=KjwUN6yGexg
<othx> InPhase linked to YouTube video "Atomstack Cambrian Pro - Printing most rubber like filament - TPR filament" => 1 IRC mentions
<pa> hmm.. compared to that video i think this tpu i have here performs better (if one manages to print it)
<InPhase> My TPU does not bounce.
<InPhase> Or at least, no more than the TPU example in the video.
<pa> umh. thats true too
<InPhase> It does a great job of absorbing shock damage though, and the TPU I have is nearly impossible to destroy without a good cutting blade.
<pa> although i never actually tried
<pa> yea mine too... only cutting breaks it
<InPhase> Like, I print out a thin sheet of TPU, and I simply cannot destroy it by hand.
<InPhase> I really want multimaterial printing though, so I can do wonderful things like try to make TPU-coated PETG.
<InPhase> Or some other similar combination that will mutually stick if that doesn't.
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<pa> i was looking at prusa website, it seems their printers can upgrade to multi material?
<pa> considering to ditch ultimaker..
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<petaflot> hello! I started a most useful project but I have some trouble with the animation, because it's non-linear. maybe someone here has a clue on how to fix it? https://github.com/petaflot/can-dee-crush
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<buZz> petaflot: cool project :)
<buZz> you could do a state machine-ish on the time variable
<buZz> 'frame 0-1000' do animation loop 1 , 'frame 1000-2000' do another
<petaflot> I tried writing sth like `if ($t<.5) { ... }` but either it shows all the time or never. do you have a syntax "guide"?
<teepee> maybe have a look at those animations https://openscad.org/advent-calendar-2020/
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<petaflot> :-D
<buZz> afaik $t increments by one every frame? not sure
<buZz> been a while since i looked into animating stuff :)
<buZz> petaflot: do you have a photo of the rooftiles that machine produces?
<petaflot> buZz: on my balcony ;-) but now it's dark (1:30 am), and I'm getting really confused trying to normalize time intervals
<buZz> hehe alright
<petaflot> anyway it's easy to make those tiles: lay the can flat on the ground, press the center down (the top and bottom will "fold" towards each other), then step on the top and on the top, done.
<petaflot> I'll add a picture tomorrow
<buZz> ah like that, alright
<buZz> no interlocking tiles :P
<buZz> 0.5L cans are 0.15 euro a piece if i bring them back to supermarket here
<petaflot> I can't get it to work. even without normalization... https://bpa.st/PBNGA
<petaflot> here cans are 20cts/kg
<petaflot> the idea is to make very simple tiles (like to old school type), just overlapping and stapled onto the paneling (lambris). I guess they could be made to interlock, but that feels overkill
<petaflot> meeh I really should get some sleep. being really silly there
<buZz> bon nuit ;)
<petaflot> can't go to sleep, just somehow got it to work :P
<petaflot> and I've been listening to https://www.youtube.com/watch?v=xJrICIYQ0R4 for hours, it's acting like a drug
<othx> petaflot linked to YouTube video "Fanfare Ciocarlia | I Am Your Gummy Bear | album "Balkan Brass Battle"" => 1 IRC mentions
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