Greetings all

Not posted much for a while, though I've been lurking. Here's a little something
of interest.

On the left, a snub cuboctahedron skeleton rendered with radiosity and focal
blur. On the right, a snub cuboctahedron skeleton output as an OpenSCAD script
using a slightly modified version of the same macro, then rendered with OpenSCAD
to an STL file, then 3D printed in stainless steel by Shapeways.com. The coin is
a UK 5p for scale (the model is about 1 inch across).

This started as an experiment to see if I could use POV-Ray to produce printable
models, but I'm so pleased with it that I'm going to make a whole collection -
starting with the rest of the Archimedean solids :)

Bill

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Download 'snub_cubes.jpg' (122 KB)

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Le 31/05/2014 00:22, Bill Pragnell nous fit lire :
> Greetings all

> On the left, a snub cuboctahedron skeleton rendered with radiosity and focal
> blur. On the right, a snub cuboctahedron skeleton output as an OpenSCAD script
> using a slightly modified version of the same macro, then rendered with OpenSCAD
> to an STL file, then 3D printed in stainless steel by Shapeways.com. The coin is
> a UK 5p for scale (the model is about 1 inch across).
> 
> This started as an experiment to see if I could use POV-Ray to produce printable
> models, but I'm so pleased with it that I'm going to make a whole collection -
> starting with the rest of the Archimedean solids :)

Greetings,

this age is wonderful.

Did you notice that the left part of the picture is not the same as the
right part ? Left hand vs right hand strikes again, and you choose a
chiral solid.


-- 
IQ of crossposters with FU: 100 / (number of groups)
IQ of crossposters without FU: 100 / (1 + number of groups)
IQ of multiposters: 100 / ( (number of groups) * (number of groups))

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Le_Forgeron <jgr### [at] freefr> wrote:
> Did you notice that the left part of the picture is not the same as the
> right part ? Left hand vs right hand strikes again, and you choose a
> chiral solid.

Yes, I did notice, although I didn't immediately realise a coordinate system
mismatch was the culprit! Something to remember for future projects; I knew
there was a good reason to use a chiral shape.

Bill

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On 05/30/2014 06:22 PM, Bill Pragnell wrote:
> Greetings all
>
> Not posted much for a while, though I've been lurking. Here's a little something
> of interest.
>
> On the left, a snub cuboctahedron skeleton rendered with radiosity and focal
> blur. On the right, a snub cuboctahedron skeleton output as an OpenSCAD script
> using a slightly modified version of the same macro, then rendered with OpenSCAD
> to an STL file, then 3D printed in stainless steel by Shapeways.com. The coin is
> a UK 5p for scale (the model is about 1 inch across).
>
> This started as an experiment to see if I could use POV-Ray to produce printable
> models, but I'm so pleased with it that I'm going to make a whole collection -
> starting with the rest of the Archimedean solids :)
>
> Bill
>
Neat! I saw recently in the news Shapeways now prints in gold - should 
you want to test that option in addition. Perhaps the gold ones could be 
gifts to fellow POV-Ray users given you've settled upon stainless steel.

Your post led me to look anew at OpenSCAD. I see they've added a surface 
displacement option based upon PNG image files among other things. Got 
me wondering if that new feature might not work pretty readily with 
Sam's Object-To-Volume conversion technique as a general way to get from 
all shapes in POV-Ray to 3d printed things. Suppose it would depend 
mostly on how well OpenSCAD's intersection/union to mesh works on the 
displaced shapes of the slices. Sam's technique can certainly create the 
PNG files for the slices.

Ah, for more free time. If only I had a great many, extra large, gold 
printed Archimedean solids on which to retire...

The other Bill P.

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William F Pokorny <ano### [at] anonymousorg> wrote:
> Your post led me to look anew at OpenSCAD.
[snip]

I honestly haven't explored OpenSCAD thoroughly yet. It was very useful in
providing a CSG 'merge' that could then be triangulated, but I've not really
looked at its other features. OpenSCAD is very slow, however. I've already
produced STL files for all the archimedean solids, and some of them took upwards
of 4 hours to be calculated (admittedly not on a particularly fast CPU).

> Ah, for more free time. If only I had a great many, extra large, gold
> printed Archimedean solids on which to retire...

You are hinting very heavily, but I regret that my disposable funds will not
stretch that far, even if my generosity did :)

> The other Bill P.

Always makes me smile

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Did you get the 3D printing done for you or did you do it yourself. If
you had it done what was the cost ?

With Stella 4D you can easily make any polyhedron and their millions
of stellations and export the stl file directly.  I know this bypasses
POV but it gets the job done.

John


On Fri, 30 May 2014 18:22:36 EDT, "Bill Pragnell"
<bil### [at] hotmailcom> wrote:

>Greetings all
>
>Not posted much for a while, though I've been lurking. Here's a little something
>of interest.
>
>On the left, a snub cuboctahedron skeleton rendered with radiosity and focal
>blur. On the right, a snub cuboctahedron skeleton output as an OpenSCAD script
>using a slightly modified version of the same macro, then rendered with OpenSCAD
>to an STL file, then 3D printed in stainless steel by Shapeways.com. The coin is
>a UK 5p for scale (the model is about 1 inch across).
>
>This started as an experiment to see if I could use POV-Ray to produce printable
>models, but I'm so pleased with it that I'm going to make a whole collection -
>starting with the rest of the Archimedean solids :)
>
>Bill
>
>
>

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AQ <AQ### [at] worldcom> wrote:
> Did you get the 3D printing done for you or did you do it yourself. If
> you had it done what was the cost ?



> With Stella 4D you can easily make any polyhedron and their millions
> of stellations and export the stl file directly.  I know this bypasses
> POV but it gets the job done.

A brief google shows me that Stella is not free software - all I need is the
vertex/edge/face data and I can do the rest for myself. I shall keep it in mind
though, thanks :)

Bill

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On Wed,  4 Jun 2014 05:20:21 EDT, "Bill Pragnell"
<bil### [at] hotmailcom> wrote:

>AQ <AQ### [at] worldcom> wrote:
>> Did you get the 3D printing done for you or did you do it yourself. If
>> you had it done what was the cost ?
>

>
>> With Stella 4D you can easily make any polyhedron and their millions
>> of stellations and export the stl file directly.  I know this bypasses
>> POV but it gets the job done.
>
>A brief google shows me that Stella is not free software - all I need is the
>vertex/edge/face data and I can do the rest for myself. I shall keep it in mind
>though, thanks :)
>
>Bill
>

Sorry I forgot to mention that Stella is not freeware.

This image came via stella though

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Attachments:
Download 'Polyhedral Virus 02d.jpg' (295 KB)

Preview of image 'Polyhedral Virus 02d.jpg'

On Wed,  4 Jun 2014 05:20:21 EDT, "Bill Pragnell"
<bil### [at] hotmailcom> wrote:

>AQ <AQ### [at] worldcom> wrote:
>> Did you get the 3D printing done for you or did you do it yourself. If
>> you had it done what was the cost ?
>

>
>> With Stella 4D you can easily make any polyhedron and their millions
>> of stellations and export the stl file directly.  I know this bypasses
>> POV but it gets the job done.
>
>A brief google shows me that Stella is not free software - all I need is the
>vertex/edge/face data and I can do the rest for myself. I shall keep it in mind
>though, thanks :)
>
>Bill

>

Bother !!!!   I meant to reply to this meassage but somehow I ended
sending it as a new thread.  

One day I will get the hang of these computers

AQ

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