Hi all, Is there a way to convert a 2D objects to a polygon format? Or a 3D object to a polyhedron format? To be able to go that way, rather than make a polygon / polyhedron from points and paths /faces would be awesome, as this would open up a whole new set of abilities. Thanks. -- View this message in context: http://forum.openscad.org/Convert-from-object-to-polygon-polyhedron-tp18522.html Sent from the OpenSCAD mailing list archive at Nabble.com.

Yes, there is but not with OpenSCAD language yet. A python code by Neon22 converts AMF files (possibly exported by OpenSCAD) to a text file in the OpenSCAD polyhedron format. See this discussion: http://forum.openscad.org/Wrapping-text-around-a-complex-geometry-td18145.html#a18156 <http://forum.openscad.org/Wrapping-text-around-a-complex-geometry-td18145.html#a18156> -- View this message in context: http://forum.openscad.org/Convert-from-object-to-polygon-polyhedron-tp18522p18523.html Sent from the OpenSCAD mailing list archive at Nabble.com.

also on thingiverse is an inkscape extension which exports vector objects to openscad format directly: - http://www.thingiverse.com/thing:1065500 Yes it would be nice if we could have lines as first class objects in OpenSCAD but for now these tools might help you On 10/4/2016 1:25 PM, Ronaldo wrote: > Yes, there is but not with OpenSCAD language yet. A python code by Neon22 > converts AMF files (possibly exported by OpenSCAD) to a text file in the > OpenSCAD polyhedron format. See this discussion: > http://forum.openscad.org/Wrapping-text-around-a-complex-geometry-td18145.html#a18156 > <http://forum.openscad.org/Wrapping-text-around-a-complex-geometry-td18145.html#a18156> > > > > -- > View this message in context: http://forum.openscad.org/Convert-from-object-to-polygon-polyhedron-tp18522p18523.html > Sent from the OpenSCAD mailing list archive at Nabble.com. > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: 10/03/16 > >

The reason there is no such thing is that OpenSCAD can not change/set the variables (set any(!) variable) during execution. But the 2d primitives are eaily written by your self. The 3D primitives are doable too, but a little harder. 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: > also on thingiverse is an inkscape extension which exports vector objects > to openscad format directly: > - http://www.thingiverse.com/thing:1065500 > > Yes it would be nice if we could have lines as first class objects in > OpenSCAD but for now these tools might help you > > > > On 10/4/2016 1:25 PM, Ronaldo wrote: > >> Yes, there is but not with OpenSCAD language yet. A python code by Neon22 >> converts AMF files (possibly exported by OpenSCAD) to a text file in the >> OpenSCAD polyhedron format. See this discussion: >> http://forum.openscad.org/Wrapping-text-around-a-complex- >> geometry-td18145.html#a18156 >> <http://forum.openscad.org/Wrapping-text-around-a-complex- >> geometry-td18145.html#a18156> >> >> >> >> -- >> View this message in context: http://forum.openscad.org/Conv >> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >> Sent from the OpenSCAD mailing list archive at Nabble.com. >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: 10/03/16 >> >> >> > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

True that all variables are constants, but there could be an operator that returns the points. That wouldn't break that paradigm. Something like: _2d = points_edges() intersection() { circle(1, $fn=20); square(2); } _3d = points_faces() intersection() { sphere(1, $fn=20); cube(2); } Where: _2d=[ [point0, point1, ...], [ [edge0, ...], [edge1, ...], ...]; _3d=[ [point0, point1, ...], [ [face0, ...], [face1, ...], ...]; On Tue, Oct 4, 2016 at 8:42 AM, Peter Falke < stempeldergeschichte@googlemail.com> wrote: > The reason there is no such thing is that OpenSCAD can not change/set the > variables (set any(!) variable) during execution. > But the 2d primitives are eaily written by your self. > The 3D primitives are doable too, but a little harder. > > 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: > >> also on thingiverse is an inkscape extension which exports vector objects >> to openscad format directly: >> - http://www.thingiverse.com/thing:1065500 >> >> Yes it would be nice if we could have lines as first class objects in >> OpenSCAD but for now these tools might help you >> >> >> >> On 10/4/2016 1:25 PM, Ronaldo wrote: >> >>> Yes, there is but not with OpenSCAD language yet. A python code by Neon22 >>> converts AMF files (possibly exported by OpenSCAD) to a text file in the >>> OpenSCAD polyhedron format. See this discussion: >>> http://forum.openscad.org/Wrapping-text-around-a-complex-geo >>> metry-td18145.html#a18156 >>> <http://forum.openscad.org/Wrapping-text-around-a-complex-ge >>> ometry-td18145.html#a18156> >>> >>> >>> >>> -- >>> View this message in context: http://forum.openscad.org/Conv >>> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >>> Sent from the OpenSCAD mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: >>> 10/03/16 >>> >>> >>> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

Oh, and further to this, yes, one can write the primitives and the operators, but that would be reinventing the wheel, and would definitely be slower. Especially with things like hull() and minkowski(). The information is available, it just needs to be made available. Thinking about this further, the operators that I described are actually a module to function crossover, which doesn't currently exist in OpenSCAD, but perhaps it could possibly be doable? Maybe by some incremental build process? As I understand it, it currently builds by: 1. calculate all variables/functions 2. calculate all operations/modules. 3. show result on screen result What I would be suggesting is to iterate over the first 2 steps, executing each iteration, child node first, up to such crossover points until everything is calculated, and then do step 3. Yes, that would be a significant change to the paradigm, but doable? On Tue, Oct 4, 2016 at 8:42 AM, Peter Falke < stempeldergeschichte@googlemail.com> wrote: > The reason there is no such thing is that OpenSCAD can not change/set the > variables (set any(!) variable) during execution. > But the 2d primitives are eaily written by your self. > The 3D primitives are doable too, but a little harder. > > 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: > >> also on thingiverse is an inkscape extension which exports vector objects >> to openscad format directly: >> - http://www.thingiverse.com/thing:1065500 >> >> Yes it would be nice if we could have lines as first class objects in >> OpenSCAD but for now these tools might help you >> >> >> >> On 10/4/2016 1:25 PM, Ronaldo wrote: >> >>> Yes, there is but not with OpenSCAD language yet. A python code by Neon22 >>> converts AMF files (possibly exported by OpenSCAD) to a text file in the >>> OpenSCAD polyhedron format. See this discussion: >>> http://forum.openscad.org/Wrapping-text-around-a-complex-geo >>> metry-td18145.html#a18156 >>> <http://forum.openscad.org/Wrapping-text-around-a-complex-ge >>> ometry-td18145.html#a18156> >>> >>> >>> >>> -- >>> View this message in context: http://forum.openscad.org/Conv >>> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >>> Sent from the OpenSCAD mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: >>> 10/03/16 >>> >>> >>> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

1. calculate all variables/functions
2. calculate all operations/modules.
3. show result on screen result

The problem is that with F5 preview the geometry is never calculated. It is straight from variables to pixels, so the information is never there unless you use render(). On 4 October 2016 at 14:32, Adrian H <adrianh.bsc@gmail.com> wrote: > Oh, and further to this, yes, one can write the primitives and the > operators, but that would be reinventing the wheel, and would definitely be > slower. Especially with things like hull() and minkowski(). > > The information is available, it just needs to be made available. > > Thinking about this further, the operators that I described are actually a > module to function crossover, which doesn't currently exist in OpenSCAD, > but perhaps it could possibly be doable? Maybe by some incremental build > process? > > As I understand it, it currently builds by: > > 1. calculate all variables/functions > 2. calculate all operations/modules. > 3. show result on screen result > > What I would be suggesting is to iterate over the first 2 steps, executing > each iteration, child node first, up to such crossover points until > everything is calculated, and then do step 3. > > Yes, that would be a significant change to the paradigm, but doable? > > > On Tue, Oct 4, 2016 at 8:42 AM, Peter Falke <stempeldergeschichte@ > googlemail.com> wrote: > >> The reason there is no such thing is that OpenSCAD can not change/set >> the variables (set any(!) variable) during execution. >> But the 2d primitives are eaily written by your self. >> The 3D primitives are doable too, but a little harder. >> >> 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: >> >>> also on thingiverse is an inkscape extension which exports vector >>> objects to openscad format directly: >>> - http://www.thingiverse.com/thing:1065500 >>> >>> Yes it would be nice if we could have lines as first class objects in >>> OpenSCAD but for now these tools might help you >>> >>> >>> >>> On 10/4/2016 1:25 PM, Ronaldo wrote: >>> >>>> Yes, there is but not with OpenSCAD language yet. A python code by >>>> Neon22 >>>> converts AMF files (possibly exported by OpenSCAD) to a text file in the >>>> OpenSCAD polyhedron format. See this discussion: >>>> http://forum.openscad.org/Wrapping-text-around-a-complex-geo >>>> metry-td18145.html#a18156 >>>> <http://forum.openscad.org/Wrapping-text-around-a-complex-ge >>>> ometry-td18145.html#a18156> >>>> >>>> >>>> >>>> -- >>>> View this message in context: http://forum.openscad.org/Conv >>>> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >>>> Sent from the OpenSCAD mailing list archive at Nabble.com. >>>> >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> Discuss@lists.openscad.org >>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>> >>>> >>>> ----- >>>> No virus found in this message. >>>> Checked by AVG - www.avg.com >>>> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: >>>> 10/03/16 >>>> >>>> >>>> >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> >> > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

1. calculate all variables/functions
2. calculate all operations/modules.
3. show result on screen result

Oh, that's unfortunate. But, can not the same idea apply to the preview? It still has to have points to be able to show the preview, doesn't it? On Oct 4, 2016 10:00 AM, "nop head" <nop.head@gmail.com> wrote: > The problem is that with F5 preview the geometry is never calculated. It > is straight from variables to pixels, so the information is never there > unless you use render(). > > On 4 October 2016 at 14:32, Adrian H <adrianh.bsc@gmail.com> wrote: > >> Oh, and further to this, yes, one can write the primitives and the >> operators, but that would be reinventing the wheel, and would definitely be >> slower. Especially with things like hull() and minkowski(). >> >> The information is available, it just needs to be made available. >> >> Thinking about this further, the operators that I described are actually >> a module to function crossover, which doesn't currently exist in OpenSCAD, >> but perhaps it could possibly be doable? Maybe by some incremental build >> process? >> >> As I understand it, it currently builds by: >> >> 1. calculate all variables/functions >> 2. calculate all operations/modules. >> 3. show result on screen result >> >> What I would be suggesting is to iterate over the first 2 steps, >> executing each iteration, child node first, up to such crossover points >> until everything is calculated, and then do step 3. >> >> Yes, that would be a significant change to the paradigm, but doable? >> >> >> On Tue, Oct 4, 2016 at 8:42 AM, Peter Falke < >> stempeldergeschichte@googlemail.com> wrote: >> >>> The reason there is no such thing is that OpenSCAD can not change/set >>> the variables (set any(!) variable) during execution. >>> But the 2d primitives are eaily written by your self. >>> The 3D primitives are doable too, but a little harder. >>> >>> 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: >>> >>>> also on thingiverse is an inkscape extension which exports vector >>>> objects to openscad format directly: >>>> - http://www.thingiverse.com/thing:1065500 >>>> >>>> Yes it would be nice if we could have lines as first class objects in >>>> OpenSCAD but for now these tools might help you >>>> >>>> >>>> >>>> On 10/4/2016 1:25 PM, Ronaldo wrote: >>>> >>>>> Yes, there is but not with OpenSCAD language yet. A python code by >>>>> Neon22 >>>>> converts AMF files (possibly exported by OpenSCAD) to a text file in >>>>> the >>>>> OpenSCAD polyhedron format. See this discussion: >>>>> http://forum.openscad.org/Wrapping-text-around-a-complex-geo >>>>> metry-td18145.html#a18156 >>>>> <http://forum.openscad.org/Wrapping-text-around-a-complex-ge >>>>> ometry-td18145.html#a18156> >>>>> >>>>> >>>>> >>>>> -- >>>>> View this message in context: http://forum.openscad.org/Conv >>>>> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >>>>> Sent from the OpenSCAD mailing list archive at Nabble.com. >>>>> >>>>> _______________________________________________ >>>>> OpenSCAD mailing list >>>>> Discuss@lists.openscad.org >>>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>>> >>>>> >>>>> ----- >>>>> No virus found in this message. >>>>> Checked by AVG - www.avg.com >>>>> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: >>>>> 10/03/16 >>>>> >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> Discuss@lists.openscad.org >>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>> >>> >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >>> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> >> > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

1. calculate all variables/functions
2. calculate all operations/modules.
3. show result on screen result

Preview doesn't compute boolean operations points. Try preview cube(10); rotate(15) sphere(10,$fn=12); with Show edges on. You will see no edges at the intersection line. 2016-10-05 21:07 GMT-03:00 Adrian H <adrianh.bsc@gmail.com>: > Oh, that's unfortunate. But, can not the same idea apply to the preview? > It still has to have points to be able to show the preview, doesn't it? > On Oct 4, 2016 10:00 AM, "nop head" <nop.head@gmail.com> wrote: > >> The problem is that with F5 preview the geometry is never calculated. It >> is straight from variables to pixels, so the information is never there >> unless you use render(). >> >> On 4 October 2016 at 14:32, Adrian H <adrianh.bsc@gmail.com> wrote: >> >>> Oh, and further to this, yes, one can write the primitives and the >>> operators, but that would be reinventing the wheel, and would definitely be >>> slower. Especially with things like hull() and minkowski(). >>> >>> The information is available, it just needs to be made available. >>> >>> Thinking about this further, the operators that I described are actually >>> a module to function crossover, which doesn't currently exist in OpenSCAD, >>> but perhaps it could possibly be doable? Maybe by some incremental build >>> process? >>> >>> As I understand it, it currently builds by: >>> >>> 1. calculate all variables/functions >>> 2. calculate all operations/modules. >>> 3. show result on screen result >>> >>> What I would be suggesting is to iterate over the first 2 steps, >>> executing each iteration, child node first, up to such crossover points >>> until everything is calculated, and then do step 3. >>> >>> Yes, that would be a significant change to the paradigm, but doable? >>> >>> >>> On Tue, Oct 4, 2016 at 8:42 AM, Peter Falke < >>> stempeldergeschichte@googlemail.com> wrote: >>> >>>> The reason there is no such thing is that OpenSCAD can not change/set >>>> the variables (set any(!) variable) during execution. >>>> But the 2d primitives are eaily written by your self. >>>> The 3D primitives are doable too, but a little harder. >>>> >>>> 2016-10-04 12:51 GMT+02:00 Mark Schafer <mschafer@wireframe.biz>: >>>> >>>>> also on thingiverse is an inkscape extension which exports vector >>>>> objects to openscad format directly: >>>>> - http://www.thingiverse.com/thing:1065500 >>>>> >>>>> Yes it would be nice if we could have lines as first class objects in >>>>> OpenSCAD but for now these tools might help you >>>>> >>>>> >>>>> >>>>> On 10/4/2016 1:25 PM, Ronaldo wrote: >>>>> >>>>>> Yes, there is but not with OpenSCAD language yet. A python code by >>>>>> Neon22 >>>>>> converts AMF files (possibly exported by OpenSCAD) to a text file in >>>>>> the >>>>>> OpenSCAD polyhedron format. See this discussion: >>>>>> http://forum.openscad.org/Wrapping-text-around-a-complex-geo >>>>>> metry-td18145.html#a18156 >>>>>> <http://forum.openscad.org/Wrapping-text-around-a-complex-ge >>>>>> ometry-td18145.html#a18156> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> View this message in context: http://forum.openscad.org/Conv >>>>>> ert-from-object-to-polygon-polyhedron-tp18522p18523.html >>>>>> Sent from the OpenSCAD mailing list archive at Nabble.com. >>>>>> >>>>>> _______________________________________________ >>>>>> OpenSCAD mailing list >>>>>> Discuss@lists.openscad.org >>>>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>>>> >>>>>> >>>>>> ----- >>>>>> No virus found in this message. >>>>>> Checked by AVG - www.avg.com >>>>>> Version: 2016.0.7797 / Virus Database: 4656/13139 - Release Date: >>>>>> 10/03/16 >>>>>> >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> OpenSCAD mailing list >>>>> Discuss@lists.openscad.org >>>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>>> >>>> >>>> >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> Discuss@lists.openscad.org >>>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>>> >>>> >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >>> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> >> > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org > >

I have written a library for my work with and for openscad that does affine transforms. I use it to generate a module that will rotate about the line through any two points in space given the two points. It simplifies a number of operations if you can wrap your brain around the affine transform. Code and test examples are at: https://github.com/ottojas/openscad-affine I would appreciate any testing comments etc. I just created the library and realized I havn't (yet) included the license for you to do whatever you want with it. I will do that now. Thanks for any help Otto