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Author Topic: Shapeways for 3D printed fractals  (Read 29639 times)
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Syntopia
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« Reply #150 on: March 23, 2014, 09:25:15 PM »

Hi bib, it is a separate program as of now. I'm experimenting a bit with Java, because there are some nice mesh libraries (in particular Hemesh), that I want to explore in order to improve the mesh quality.
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taurus
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« Reply #151 on: March 23, 2014, 11:04:41 PM »

Nice to see, that there is still motion in preparation of printable meshes.
I remember my expierience with mystic fractal programs, which export a native mesh, without the "cubified" voxel stack approach. My problems with voxel stacks are not the quality of the initial mesh. It is the lack of possibilities when it comes to optimisation. I described it here in detail. http://www.fractalforums.com/format-printing-and-post-production/shapeways-for-3d-printed-fractals/msg55054/#msg55054
So my question is to you Syntopia. Does your Program export triangulated point meshes, or are they block-meshes like voxel stacks are?
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thargor6
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« Reply #152 on: March 24, 2014, 12:38:13 AM »

Thanks for the hint about Hemesh, as I still have mesh-export for my software in mind. Flame-fractals as real objects, a thing I'm really fascinated of, all the time :-) And thanks to all of you for investigating this 3D-printing-stuff, it is overall very fascinating, but I had no time for it, yet

Andreas
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Syntopia
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« Reply #153 on: March 24, 2014, 09:39:11 PM »

Shapeways actually has a quite impressive tool for working with voxels, called ShapeJS: http://shapejs.shapeways.com/

It sends small JavaScript-programs to a Shapeways-server which evalutes them and creates a polygon representation.
Interestingly, it uses a Java OpenSource API for doing the voxel computations on the serverside, called AbFab3D: http://abfab3d.com/, which might be useful to the ones doing Java-stuff here at the forums.

It seems to be doing a good job on e.g. the Gyroid: http://shapejs.shapeways.com/examples, try comparing with my own Marching Cubes export: https://twitter.com/SyntopiaDK/statuses/434336584452685825

Nice to see, that there is still motion in preparation of printable meshes.
I remember my experience with mystic fractal programs, which export a native mesh, without the "cubified" voxel stack approach. My problems with voxel stacks are not the quality of the initial mesh. It is the lack of possibilities when it comes to optimisation. I described it here in detail. http://www.fractalforums.com/format-printing-and-post-production/shapeways-for-3d-printed-fractals/msg55054/#msg55054
So my question is to you Syntopia. Does your Program export triangulated point meshes, or are they block-meshes like voxel stacks are?

My software creates a triangle mesh based on uniform grid sampling of a distance function - done using the Marching Cubes algorithm, which is perhaps the most wellknown meshing algorithm. So it is not terribly novel. I'm hoping to be able to optimize and reduce these triangles in a better way that Meshlab allows, but I am beginning to doubt that there are much better methods then the ones implemented in Meshlab - I tried a few other academic remeshers (found on the net) and these did not produce better results.
 
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taurus
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« Reply #154 on: March 25, 2014, 04:03:46 PM »

My software creates a triangle mesh based on uniform grid sampling of a distance function - done using the Marching Cubes algorithm, which is perhaps the most wellknown meshing algorithm. So it is not terribly novel. I'm hoping to be able to optimize and reduce these triangles in a better way that Meshlab allows, but I am beginning to doubt that there are much better methods then the ones implemented in Meshlab - I tried a few other academic remeshers (found on the net) and these did not produce better results.

Thanks so far for the info Syntopia. A Beer Cup I guess the raw marching cube algorithm creates simillar problems in optimization as voxel stacks. I read some about simplifications and improvements of marching cubes, but my knowledge is far too little, to take any advantage that. In the end I guess, I need to contact Terry Gintz and ask him, what kind of wizzardery he is using, to create his meshes...

>>edit. hm, the more I read the more interresting this marching cubes stuff is getting. maybe I judged too early. Looking forward to see future developments...
« Last Edit: March 25, 2014, 04:24:38 PM by taurus » Logged

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tomot
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« Reply #155 on: March 25, 2014, 06:43:33 PM »

Shapeways actually has a quite impressive tool for working with voxels, called ShapeJS: http://shapejs.shapeways.com/

It sends small JavaScript-programs to a Shapeways-server which evalutes them and creates a polygon representation.
Interestingly, it uses a Java OpenSource API for doing the voxel computations on the serverside, called AbFab3D: http://abfab3d.com/, which might be useful to the ones doing Java-stuff here at the forums.

It seems to be doing a good job on e.g. the Gyroid: http://shapejs.shapeways.com/examples,

I'm curious, what use can be made with the output.x3db file format? 
It seems strange to me develop yet another 3d file format. Don't we have enough of them already?   smiley
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tomot
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« Reply #156 on: April 29, 2014, 06:55:46 PM »

Move over Shapeways! smiley Larger 3d printing technology is on its way!

Giant Chinese 3D printer builds 10 houses in just 1 day.... check it out!

http://rt.com/news/155220-3d-printer-houses-china/
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bib
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« Reply #157 on: May 16, 2014, 07:10:21 PM »

New apollonian style 3D prints designed with Incendia:

White Strong & Flexible octahedron

www.shapeways.com/model/1913632/apollonian-octahedron.html

Gold plated steel cube

Frosted detail cube

White Strong & Flexible cube

www.shapeways.com/model/1913067/apollonian-cube.html

Frosted detail tetrahedron

www.shapeways.com/model/1910264/apollonian-tetrahedron-small.html

Hope you like them!
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taurus
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« Reply #158 on: May 16, 2014, 07:33:33 PM »

Very nice! Seems, that incendia provides much sharper models, than the fuzzy voxel stacks of m3d. Really looking good...
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bib
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« Reply #159 on: May 16, 2014, 11:02:17 PM »

Yes, Incendia exports directly in STL with a choice of algorithms to produce an optimized mesh. If you draw a parallel with traditional rendering, it's like M3D+Fiji produces an aliased image, which is not a problem if you render at high resolution and then smooth and scale down, whereas Incendia produces an already "anti-aliased" mesh, which somehow simplifies the workflow. But Incendia has some drawbacks too...
Thanks!
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bib
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« Reply #160 on: June 07, 2014, 07:39:23 PM »

<a href="http://www.youtube.com/v/Zd6ceu17kHM&rel=1&fs=1&hd=1" target="_blank">http://www.youtube.com/v/Zd6ceu17kHM&rel=1&fs=1&hd=1</a>
Model made with Incendia
Size: 24.5 cm / 9.6 in.
Wire thickness: 0.8-1mm
Density: 0.22%




https://www.shapeways.com/model/1980200/apollonian-tetrahedron-xxl.html
« Last Edit: June 07, 2014, 07:40:57 PM by bib » Logged

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LMarkoya
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« Reply #161 on: June 08, 2014, 02:12:34 AM »

Beautiful stuff Bib....and so delicate....
Nice job
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mclarekin
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« Reply #162 on: June 09, 2014, 03:00:00 AM »

Great printing (and photography) A Beer Cup A Beer Cup A Beer Cup
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bib
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« Reply #163 on: July 04, 2014, 02:09:50 PM »

If you understand French, here's an interesting article which explains that fractals (the Menger cube in particular) have been at the inception of the invention of stereolithography (3D printing) back in 1984.

http://i3dactu.fr/on-a-retrouve-les-vrais-inventeurs-de-l-imprimante-3d/



A couple of months ago I had the chance to meet Professor AndrÚ, the true inventor of stereolithography, who told me the research was now focusing on volumetric 3D printing (as opposed to layer by layer as it works today)...
« Last Edit: July 04, 2014, 02:14:06 PM by bib » Logged

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LMarkoya
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« Reply #164 on: July 05, 2014, 05:40:50 PM »

All great stuff, don't quite understand volumetric printing though....will you start with a volume and remove mass? not sure how that would work....but great stuff
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