Very tough to design in pure openscad
link to download:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design.scad
[image: Screenshot 2023-09-19 at 5.56.51 AM.png]
[image: Screenshot 2023-09-19 at 6.00.32 AM.png]
I did cutouts in pure OpenSCAD, but only for simple cylinders. See
https://github.com/BelfrySCAD/BOSL2/wiki/rounding.scad#module-bent_cutout_mask
On Mon, Sep 18, 2023 at 8:35 PM Sanjeev Prabhakar sprabhakar2006@gmail.com
wrote:
Very tough to design in pure openscad
link to download:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design.scad
[image: Screenshot 2023-09-19 at 5.56.51 AM.png]
[image: Screenshot 2023-09-19 at 6.00.32 AM.png]
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Hi Adrian,
Thanks for sharing, but this is quite different.
I will explain the process I followed once I get some free time.
I am sure this would be useful to many here
On Tue, 19 Sept, 2023, 7:31 am Adrian Mariano, avm4@cornell.edu wrote:
I did cutouts in pure OpenSCAD, but only for simple cylinders. See
https://github.com/BelfrySCAD/BOSL2/wiki/rounding.scad#module-bent_cutout_mask
On Mon, Sep 18, 2023 at 8:35 PM Sanjeev Prabhakar <
sprabhakar2006@gmail.com> wrote:
Very tough to design in pure openscad
link to download:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design.scad
[image: Screenshot 2023-09-19 at 5.56.51 AM.png]
[image: Screenshot 2023-09-19 at 6.00.32 AM.png]
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i have got somebody asking a question regarding the Constructive
library here: https://github.com/solidboredom/constructive/issues/5
if it can be dual licensed under OHL-S (v2). It is now under GPL2 (just
because i have known it and its principles for very many years)
Now i wonder, what would it be a suitable License for the Constructive Lib?
I feel the lib is much more an extension to the Openscad Language
itself, like list comprehentions to python, or LINQ to c#, rather than a
library in usual sense. It is just all written in openscad, so it can be
imported as a library. and technically it is one.The Lib does provide
few ready-made Parts, like some metric screws, but its focus is not
that, but rather on enabling the user to express more with less code and
make it flexible enough to create reasonably complex designs.
So how to license it, so it will stay compatible with Openscad's
licensing and enable most people to use it?
I would like to encourage people to use it, because i personally think
it makes so much sense. to not hamper peoples use of it in their
hardware by the license.
The only thing i might not like (i am not even sure), if somebody
derives code from it, closing it. But actually i do not mean the Parts
themselves or their designs. they IMHO do not have to be open.
what are you opinions on this?
is OHL-S (v2) a good solution, does it negate GPL principles in our
case? is it compatible with Openscads license?
Your Opinions are very appreciated.
pproj
here is another version:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design_1.scad
[image: Screenshot 2023-09-20 at 7.26.34 AM.png]
[image: Screenshot 2023-09-20 at 7.25.11 AM.png]
On Tue, 19 Sept 2023 at 08:44, Sanjeev Prabhakar sprabhakar2006@gmail.com
wrote:
Hi Adrian,
Thanks for sharing, but this is quite different.
I will explain the process I followed once I get some free time.
I am sure this would be useful to many here
On Tue, 19 Sept, 2023, 7:31 am Adrian Mariano, avm4@cornell.edu wrote:
I did cutouts in pure OpenSCAD, but only for simple cylinders. See
https://github.com/BelfrySCAD/BOSL2/wiki/rounding.scad#module-bent_cutout_mask
On Mon, Sep 18, 2023 at 8:35 PM Sanjeev Prabhakar <
sprabhakar2006@gmail.com> wrote:
Very tough to design in pure openscad
link to download:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design.scad
[image: Screenshot 2023-09-19 at 5.56.51 AM.png]
[image: Screenshot 2023-09-19 at 6.00.32 AM.png]
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Look, for example, at the widely used threads_2.5.scad in
https://www.printables.com/model/379145-nuts-and-bolts-v195-openscad-library/files
The statement
metric_thread(length=4);
evaluates to the following in the 2021.1 release, but
[image: Screenshot 2023-09-19 at 9.55.57 PM.png]
evaluates to this in the dev builds.
[image: Screenshot 2023-09-19 at 9.55.25 PM.png]
The culprit is in module metric_thread_turns
which has
intersection () {
// Start one below z = 0. Gives an extra turn at each end.
for (i=[-1*n_starts : n_turns+1]) {
translate ([0, 0, i*pitch]) {
metric_thread_turn (diameter, pitch, internal, n_starts,
thread_size, groove, square, rectangle,
angle,
taper, i*pitch);
}
}
// Cut to length.
translate ([0, 0, length/2]) {
cube ([diameter*3, diameter*3, length], center=true);
}
}
in the release build the for() has an implicit union.
In the dev build, to fix this, we have to add an explicit union:
intersection () {
*union*(){ // <===
// Start one below z = 0. Gives an extra turn at each end.
for (i=[-1*n_starts : n_turns+1]) {
translate ([0, 0, i*pitch]) {
metric_thread_turn (diameter, pitch, internal, n_starts,
thread_size, groove, square, rectangle,
angle,
taper, i*pitch);
}
}
}
I think, in general, that this is a good fix, but it silently breaks a lot
of old code.
Is there any way to detect this and add a warning on the console, or some
other way for a naive programmer to quickly find problems like this?
here is the explanation on how to create such design
On Wed, 20 Sept 2023 at 07:31, Sanjeev Prabhakar sprabhakar2006@gmail.com
wrote:
here is another version:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design_1.scad
[image: Screenshot 2023-09-20 at 7.26.34 AM.png]
[image: Screenshot 2023-09-20 at 7.25.11 AM.png]
On Tue, 19 Sept 2023 at 08:44, Sanjeev Prabhakar sprabhakar2006@gmail.com
wrote:
Hi Adrian,
Thanks for sharing, but this is quite different.
I will explain the process I followed once I get some free time.
I am sure this would be useful to many here
On Tue, 19 Sept, 2023, 7:31 am Adrian Mariano, avm4@cornell.edu wrote:
I did cutouts in pure OpenSCAD, but only for simple cylinders. See
https://github.com/BelfrySCAD/BOSL2/wiki/rounding.scad#module-bent_cutout_mask
On Mon, Sep 18, 2023 at 8:35 PM Sanjeev Prabhakar <
sprabhakar2006@gmail.com> wrote:
Very tough to design in pure openscad
link to download:
https://github.com/sprabhakar2006/openSCAD/blob/main/bottle%20with%20cut%20design.scad
[image: Screenshot 2023-09-19 at 5.56.51 AM.png]
[image: Screenshot 2023-09-19 at 6.00.32 AM.png]
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
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