<kintel>
t4nk_fn What distro? Btw. there are some larger changes going on in the Manifold build system these days, so if you're building from their master branch, you may run into something new
<t4nk_fn>
gentoo, kintel
<kintel>
Latest tagged release should be good though
<t4nk_fn>
well, I've been freewheeling for a while now with my own ebuild
<kintel>
I'm also planning to clean up OpenSCAD's manifold pieces to make using an external manifold more conventional, but I'm waiting for Manifold to stabilize a bit first
<t4nk_fn>
but I don't really see how to get manifold to build that libcross_something.so
<t4nk_fn>
thing is.. my ebuild does secretly also build manifold (which I have packaged and installed separately) .. but then doesn't use it I guess. but the point is that it DOEs have /work/openscad-9999_build/submodules/manifold/src/cross_section/libcross_section.so
<t4nk_fn>
though I can't use that one of course
<t4nk_fn>
but it does build it, whilst my own package doesn't
<t4nk_fn>
there's no 'submodules' directory in my version of manifold at all
<t4nk_fn>
-----
<t4nk_fn>
the comment about mayo's version was something different I guess.. I came across 'manifold3d.cpp:196:24: error: ‘ndarray_wrap’ was not declared in this scope'
<t4nk_fn>
when I tried to build his version
<t4nk_fn>
which is probably strange because my numpy is dev-python/numpy-2.1.1
<kintel>
Top level object is a 3D object (manifold):
<t4nk_fn>
Total rendering time: 0:00:11.468
<t4nk_fn>
Top level object is a 3D object (Nef polyhedron):
<t4nk_fn>
(obviously that was not a cube ;) )
<t4nk_fn>
Total rendering time: 0:00:00.520
<t4nk_fn>
Top level object is a 3D object (manifold):
<t4nk_fn>
that's from the official build. is this because of 'Geometries in cache: 6' btw? otherwise it would be bloody fast in comparison
<t4nk_fn>
well, got my build back up by pinning to manifold@22c6605 I'm happy again ;)
<t4nk_fn>
well, pinning my manifold package that is.
<t4nk_fn>
luckily it isn't used for anything else
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<pca006132>
yeah we are happily throwing in breaking changes before v3.0 release
<pca006132>
we want to do it once and for all
<pca006132>
and 20 times faster is not really that much faster :P
<t4nk_fn>
lol hehe
<t4nk_fn>
euh.. something is still wrong in openscad though
<t4nk_fn>
if I run that command line it renders fast.. but within openscad the rendering still takes ages
<pca006132>
there is a setting
<pca006132>
advanced -> backend or something
<t4nk_fn>
oki!
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<ekabisch>
Hello. Can I ask in german language ?
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<teepee>
ekabisch: können wir gerne mal machen, hier sind einige im Kanal die mitreden können :-)
<ekabisch>
I wanted to make a chamfered rectangular hole in a plate over a truncated pyramid (polyhedron([..])). The truncated pyramid alone is displayed and rendered correctly, but it cannot be differentiated from another object. I've tried so many things and don't know what to do anymore. Can anyone help?
<InPhase>
ekabisch: Also, an alternative solution structure, if I understood your general design aspiration correctly: difference() { $fn=4; cylinder(r1=20, r2=10, h=10); translate([0,0,5]) cylinder(r=5, h=9); translate([0,0,9]) cylinder(r1=5, r2=7, h=2); }
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<InPhase>
ekabisch: polyhedron is absolutely amazing. And a lot of hard work to get right manually. It is best to use library support if you're going to use it, or hunt a little bit for alternative solutions. Then you fall back to polyhedron when you confirm there aren't other good approaches.
<InPhase>
ekabisch: An example of doing the same with library support: https://bpa.st/374Q
<J24k>
InPhase you setting the square hat h= 0.. twice at 10 then at 9 and 5 and that works?
<J24k>
oh - it is not the chamfered square hole .. sorry
<J24k>
can you do dual walls with close points?
<InPhase>
What do you mean by dual walls?
<J24k>
like a ring but building along the center and not along the circumverence
<InPhase>
Yes, if I understand you correctly.
<J24k>
how do you define a polygon with a hole
<InPhase>
CloseLoop
<InPhase>
For a polyhedron with a hole.
<InPhase>
But you can do that in either direction for a ring.
<J24k>
close loop sounds like you going around like rotate extrude
<InPhase>
That's the easiest way to think about it, but it's not required.
<J24k>
can you have a polygon with a hole as input?
<J24k>
(or multiple holes)
<InPhase>
No, the hole is made on the return path.
<J24k>
by starting and ending with the same polygon (without hole)
<J24k>
hmm but maybe i can tune my module to work with multiple holes - on the other hand it is probably very rarely used
<InPhase>
J24k: That's a list of 4 polygons, basically. Outer, outer, inner, inner.
<InPhase>
Topological equivalent to the rotate extrude approach. :)
<J24k>
yeah that is easy - but doesn't work for a second hole
<InPhase>
Correct, there is no trivial way I could come up with to support topologies with multiple holes.
<J24k>
in the past it worked by just adding the holes .. it would create 0 width walls between them if they start and end at the same point - and those walls get removed when rendering ( not sure if this still works)
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<J24k>
my module works with a "loop" variable that is the length of the polygon - in theory it should be easy to allow lists as loop so multiple walls are created - only the normal vector might be tricky if those are within or outside
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<J24k>
probably so much easier to use a difference()
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<rvt>
is this 3d printable? https://i.imgur.com/9mIzACS.pnghttps://i.imgur.com/VNeG8NJ.png I am tryng to make a holder for an ceramic GPS antenna that can roate around a 90 degree axis. It will me mounted on a case. So depending if the oritentation of the case, you can rotate the GPS antenna towards the sky.
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<rvt>
I am struggeling to find a noce compact design that is printable
<rvt>
The two ruber rings on the ‘tube’ are suppose to fit into a other tube make it rotatable… if it makes sense..
<J24k>
rvt it sure is, but need supports
<J24k>
but you could modify the bottom so it works without or very little supports
<rvt>
I think so indeed… to make it flat…
<J24k>
make it a cone
<rvt>
The problem is, I wanted to make a screw cap… but that then makes little room for the threads
<rvt>
dear god you are so fast… I spend 2 hours working on something like that :D
<J24k>
just 6 lines of code with my library
<rvt>
I used BOSL2 but I always have to re-read it once I don’t do openscad for a few weeks
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<J24k>
writing your own is always easier, doesn't need to be so complex like BOSL2
<rvt>
unfortuntly… I would properly spend more thime on it…
<J24k>
But i have a help parameter to list all setting in the console window - because i can't remember what i wrote a year ago - very rarely i need to open the code though
<J24k>
as you said you already invested 2h .. if you just make the parts into modules and add them to your library .. the next time you save 1.5h
<J24k>
unfortuntly - Ü i like that
<rvt>
I usually ad them to my ‘parts’ library… but as I don;t ezcel in it, they always seem to become messy
<othx>
guso78 linked to YouTube video "Morphing a cube into a dodecahedron" => 1 IRC mentions
<guso78>
90 LOC
<J24k>
rvt looks good to me
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<kintel>
Are anyone familiar with Windows filesystem stuff? We have some places where we use QString::toLocal8Bit() to attempt to generate Windows filenames from (utf-8) std::string instances.