I have been working with python to find some solution on fillets and rounding in openSCAD. Although I could not find any specific solution, there could be a few strategies which can be followed to create rounding and fillets. sharing a few pictures here to show what is possible. What is required is to find a way to work with points in 3d space, instead of openSCAD primitives. [image: Screenshot 2025-08-22 at 10.43.34 PM.png] [image: Screenshot 2025-08-22 at 9.44.25 PM.png] [image: Screenshot 2025-08-22 at 11.14.20 PM.png] [image: Screenshot 2025-08-22 at 11.18.54 PM.png][image: Screenshot 2025-08-22 at 11.21.39 PM.png][image: Screenshot 2025-08-22 at 11.41.27 PM.png]

Sorry if you think this is pedantic, but you are NOT trying "to find some solution on fillets and rounding in openSCAD".  You are trying to find a solution in Python and OpenSCAD. And that is a huge difference. BOSL attempts to solve these problems in OpenSCAD.  To date, I do not recall your trying to do this at all. I get frustrated with these kinds of mis-statements. Jon On 8/22/2025 2:12 PM, Sanjeev Prabhakar via Discuss wrote: > I have been working with python to find some solution on fillets and > rounding in openSCAD. > > Although I could not find any specific solution, there could be a few > strategies which can be followed to create rounding and fillets. > > sharing a few pictures here to show what is possible. What is required > is to find a way to work with points in 3d space, instead of openSCAD > primitives. > Screenshot 2025-08-22 at 10.43.34 PM.png > Screenshot 2025-08-22 at 9.44.25 PM.png > Screenshot 2025-08-22 at 11.14.20 PM.png > Screenshot 2025-08-22 at 11.18.54 PM.pngScreenshot 2025-08-22 at > 11.21.39 PM.pngScreenshot 2025-08-22 at 11.41.27 PM.png > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Please don't feel frustrated, have a bucket of cold water and relax. On Sat, 23 Aug 2025 at 00:26, Jon Bondy <jon@jonbondy.com> wrote: > Sorry if you think this is pedantic, but you are NOT trying "to find some > solution on fillets and rounding in openSCAD". You are trying to find a > solution in Python and OpenSCAD. > > And that is a huge difference. > > BOSL attempts to solve these problems in OpenSCAD. To date, I do not > recall your trying to do this at all. > > I get frustrated with these kinds of mis-statements. > > Jon > > > On 8/22/2025 2:12 PM, Sanjeev Prabhakar via Discuss wrote: > > I have been working with python to find some solution on fillets and > rounding in openSCAD. > > Although I could not find any specific solution, there could be a few > strategies which can be followed to create rounding and fillets. > > sharing a few pictures here to show what is possible. What is required is > to find a way to work with points in 3d space, instead of openSCAD > primitives. > [image: Screenshot 2025-08-22 at 10.43.34 PM.png] > [image: Screenshot 2025-08-22 at 9.44.25 PM.png] > [image: Screenshot 2025-08-22 at 11.14.20 PM.png] > [image: Screenshot 2025-08-22 at 11.18.54 PM.png][image: Screenshot > 2025-08-22 at 11.21.39 PM.png][image: Screenshot 2025-08-22 at > 11.41.27 PM.png] > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free.www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > <#m_-1398042392476013121_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >

 Sorry if you think this is pedantic, but you are NOT trying "to
 find some solution on fillets and rounding in openSCAD".  You are
 trying to find a solution in Python and OpenSCAD.

 And that is a huge difference.

 BOSL attempts to solve these problems in OpenSCAD.  To date, I do
 not recall your trying to do this at all.

 I get frustrated with these kinds of mis-statements.

 Jon


 On 8/22/2025 2:12 PM, Sanjeev Prabhakar via Discuss wrote:

 I have been working with python to find some solution on fillets
 and rounding in openSCAD.

 Although I could not find any specific solution, there could be a
 few strategies which can be followed to create rounding and fillets.

 sharing a few pictures here to show what is possible. What is
 required is to find a way to work with points in 3d space,
 instead of openSCAD primitives.
 Screenshot 2025-08-22 at 10.43.34 PM.png
 Screenshot 2025-08-22 at 9.44.25 PM.png
 Screenshot 2025-08-22 at 11.14.20 PM.png
 Screenshot 2025-08-22 at 11.18.54 PM.pngScreenshot 2025-08-22 at
 11.21.39 PM.pngScreenshot 2025-08-22 at 11.41.27 PM.png

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 To unsubscribe send an email todiscuss-leave@lists.openscad.org

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 <#m_-1398042392476013121_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

@Jon: For me, I don't care if the method is in "pure" openscad or not. If it is good and general, we can implement it in C++ and expose it as a call. If it is not general enough, there is still a chance it can be implemented in userspace when we expose geometry data to users. @Sanjeev: I have several questions. 1. What are your strategies? 2. Are your fillets real fillets (constant radius or something), or just something that looks good enough? For the third figure (2 tubes), it doesn't look like a constant radius result to me as the transition doesn't look as smooth. On 8/23/25 10:15, Sanjeev Prabhakar via Discuss wrote: > Please don't feel frustrated, have a bucket of cold water and relax. > > On Sat, 23 Aug 2025 at 00:26, Jon Bondy <jon@jonbondy.com> wrote: > > Sorry if you think this is pedantic, but you are NOT trying "to > find some solution on fillets and rounding in openSCAD".  You are > trying to find a solution in Python and OpenSCAD. > > And that is a huge difference. > > BOSL attempts to solve these problems in OpenSCAD.  To date, I do > not recall your trying to do this at all. > > I get frustrated with these kinds of mis-statements. > > Jon > > > On 8/22/2025 2:12 PM, Sanjeev Prabhakar via Discuss wrote: >> I have been working with python to find some solution on fillets >> and rounding in openSCAD. >> >> Although I could not find any specific solution, there could be a >> few strategies which can be followed to create rounding and fillets. >> >> sharing a few pictures here to show what is possible. What is >> required is to find a way to work with points in 3d space, >> instead of openSCAD primitives. >> Screenshot 2025-08-22 at 10.43.34 PM.png >> Screenshot 2025-08-22 at 9.44.25 PM.png >> Screenshot 2025-08-22 at 11.14.20 PM.png >> Screenshot 2025-08-22 at 11.18.54 PM.pngScreenshot 2025-08-22 at >> 11.21.39 PM.pngScreenshot 2025-08-22 at 11.41.27 PM.png >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email todiscuss-leave@lists.openscad.org > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free.www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > > <#m_-1398042392476013121_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org

Both are possible perfect radius fillets and visually appealing one I am attaching 2 files with very simple example, due to file size constraints Will explain the strategies later in evening once I have some time

There are mainly 2 simpler ways which works for creating fillets strategy 1 is explained in attached file. Let me know, in case you have any questions On Sat, 23 Aug 2025 at 10:52, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > Both are possible > perfect radius fillets and visually appealing one > I am attaching 2 files with very simple example, due to file size > constraints > > Will explain the strategies later in evening once I have some time > >

 Both are possible
 perfect radius fillets and visually appealing one
 I am attaching 2 files with very simple example, due to file size
 constraints

 Will explain the strategies later in evening once I have some time

OK, the method you are talking about doesn't seem new, and is not that general. Another question is, if we want to support this, we will need a way to specify which edges the user wants (apart from being able to compute the points in openscad). On 8/23/25 22:14, Sanjeev Prabhakar wrote: > There are mainly 2 simpler ways which works for creating fillets > > strategy 1 is explained in attached file. > > Let me know, in case you have any questions > > > On Sat, 23 Aug 2025 at 10:52, Sanjeev Prabhakar > <sprabhakar2006@gmail.com> wrote: > > Both are possible > perfect radius fillets and visually appealing one > I am attaching 2 files with very simple example, due to file size > constraints > > Will explain the strategies later in evening once I have some time >

Your question is not completely clear to me. Are you saying some portion of the intersection line to convert to fillet? That can be done by selecting those few points in the intersection line. So openscad should have a way to select a portion of a list. On Sun, 24 Aug, 2025, 5:50 am pca006132, <john.lck40@gmail.com> wrote: > OK, the method you are talking about doesn't seem new, and is not that > general. > > Another question is, if we want to support this, we will need a way to > specify which edges the user wants (apart from being able to compute the > points in openscad). > On 8/23/25 22:14, Sanjeev Prabhakar wrote: > > There are mainly 2 simpler ways which works for creating fillets > > strategy 1 is explained in attached file. > > Let me know, in case you have any questions > > > On Sat, 23 Aug 2025 at 10:52, Sanjeev Prabhakar <sprabhakar2006@gmail.com> > wrote: > >> Both are possible >> perfect radius fillets and visually appealing one >> I am attaching 2 files with very simple example, due to file size >> constraints >> >> Will explain the strategies later in evening once I have some time >> >>

Yes you can select sublist, but doing this is annoying. Ideally we should provide APIs to select edges formed due to intersection, or around certain features, for example. On Sun, Aug 24, 2025, 10:05 Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > Your question is not completely clear to me. Are you saying some portion > of the intersection line to convert to fillet? > > That can be done by selecting those few points in the intersection line. > So openscad should have a way to select a portion of a list. > > On Sun, 24 Aug, 2025, 5:50 am pca006132, <john.lck40@gmail.com> wrote: > >> OK, the method you are talking about doesn't seem new, and is not that >> general. >> >> Another question is, if we want to support this, we will need a way to >> specify which edges the user wants (apart from being able to compute the >> points in openscad). >> On 8/23/25 22:14, Sanjeev Prabhakar wrote: >> >> There are mainly 2 simpler ways which works for creating fillets >> >> strategy 1 is explained in attached file. >> >> Let me know, in case you have any questions >> >> >> On Sat, 23 Aug 2025 at 10:52, Sanjeev Prabhakar <sprabhakar2006@gmail.com> >> wrote: >> >>> Both are possible >>> perfect radius fillets and visually appealing one >>> I am attaching 2 files with very simple example, due to file size >>> constraints >>> >>> Will explain the strategies later in evening once I have some time >>> >>>

Yes, you can do that for sure. Here is strategy 2 for filleting. On Sun, 24 Aug 2025 at 08:04, pca006132 <john.lck40@gmail.com> wrote: > Yes you can select sublist, but doing this is annoying. Ideally we should > provide APIs to select edges formed due to intersection, or around certain > features, for example. > > On Sun, Aug 24, 2025, 10:05 Sanjeev Prabhakar <sprabhakar2006@gmail.com> > wrote: > >> Your question is not completely clear to me. Are you saying some portion >> of the intersection line to convert to fillet? >> >> That can be done by selecting those few points in the intersection line. >> So openscad should have a way to select a portion of a list. >> >> On Sun, 24 Aug, 2025, 5:50 am pca006132, <john.lck40@gmail.com> wrote: >> >>> OK, the method you are talking about doesn't seem new, and is not that >>> general. >>> >>> Another question is, if we want to support this, we will need a way to >>> specify which edges the user wants (apart from being able to compute the >>> points in openscad). >>> On 8/23/25 22:14, Sanjeev Prabhakar wrote: >>> >>> There are mainly 2 simpler ways which works for creating fillets >>> >>> strategy 1 is explained in attached file. >>> >>> Let me know, in case you have any questions >>> >>> >>> On Sat, 23 Aug 2025 at 10:52, Sanjeev Prabhakar < >>> sprabhakar2006@gmail.com> wrote: >>> >>>> Both are possible >>>> perfect radius fillets and visually appealing one >>>> I am attaching 2 files with very simple example, due to file size >>>> constraints >>>> >>>> Will explain the strategies later in evening once I have some time >>>> >>>>