<lauraaa>
and i was wondering how does --export-format arg work, i am currently using -o [ --o ] arg to convert from scad to stl
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<ran>
how is the development of offset_extrude() coming along?
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<J1A843722>
i have a module that works with points input Ü
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<ecraven>
anyone here using openscad for 3d laser cutter design?
<ecraven>
sorry, *2d*, not 3d
<ecraven>
3d only as in "I design a box in scad in 3d, but then I want to export it as a series of 2d shapes for the laser cutter"
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<J1A84>
ecraven yes i have
<ecraven>
J1A84: how do you do that :D
<J1A84>
but only closed polygon can be cut not single lines
<ecraven>
I can see how I would design the single parts, but how do I project them all onto a plane?
<ecraven>
and export as some sort of vector format
<J1A84>
you create a 2D (or projection) then save in a 2D format svg/dxf and load into your laser cutter software
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<J1A84>
circles and square or polygon are 2D
<J1A84>
also text
<ecraven>
but I want to design it in 3d, to look at in in openscad, I think?
<J1A84>
2D objects are previewd as 3d objects with height of 1
<J1A84>
but you can draw a cube and use projection()
<ecraven>
yea, but they are shown side by side then, not in-place, right? or do you just rotate them into place?
<J1A84>
but you can not cut a sphere as it will project into a circle so that 3D may be misleading
<ecraven>
yea, I'm mostly thinking about box designs atm
<J1A84>
there are libraries for that as you will need 8 face cuts per cube with overlap to interlock so you need to calculate the material thickness into that
<J1A84>
sorry 6 faces top, bottom, left, right and front back
<J1A84>
there are also ways to make bending pieces by adding cuts
<ecraven>
yea ;) so many interesting things to do with the laser cutter!
<J1A84>
if you have a 5 axis cutter you can make beveled cuts
<ecraven>
yea, this is 2-axis only.. I'd love a third axis, for deeper cuts
<J1A84>
this will not help much (except in PMMA) as the laser cone is defined .. there are other optics with different focal length
<J1A84>
But i also used engraving to carve of material and resulting with a 45° edge or even 3D structures- but it is not very precise.
<J1A84>
ecraven back to your question - if you need to assemble the parts you will make a to sets (or module that has a option to switch) so one is arranged the 2D shapes and the other will be the 3D parts rendered with material thickness. There is also cool nesting software https://deepnest.io/#about
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<ran>
what's the status on implementing offset_extrude()?
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<teepee>
ran: it seems a bit stalled at this point
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<ran>
teepee, thanks for the info. I'm working on a project that would greatly benefit from it.
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<teepee>
ran: if you need it now, you can look at the libraries providing those features, like UB.scad J1A84 mentioned, or BOSL2
<J1A84>
round anything probably also have that
<J1A84>
( at least i assume the fillet isn't done by using linear_extrudes and rotate_extrudes but i already have thought about a module doing that)
<ran>
nah I'm just using minkowski right now and putting up with it taking five minutes to render
<J1A84>
minkowski is a real pain for concave fillets
<J1A84>
for convex with the current improvements it is really fast
<J1A84>
ran do you already using 2022 version?
<ran>
i'm using 2021.01
<J1A84>
try the nightly dev - probably much faster ( activate fast csg in preferences)
<J1A84>
(bit more sensitive about co planar faces though)