How to draw diamond shape? All  1-20
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 From:  Brian (BWTR)
2227.1 
Hi Burr
Associated with other threads----

Have you/anyone, come up with a good solution to creating a fascetted diamond----in MoI?

(I have the ?Rhino 3dm diamond file that was posted on the forum earlier)

Brian

EDITED: 7 Dec 2008 by MICHAEL GIBSON

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 From:  Michael Gibson
2227.2 In reply to 2227.1 
Hi Brian, I split this off into its own thread.

I'll have a video for you in a minute.

- Michael
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 From:  Michael Gibson
2227.3 In reply to 2227.1 
Hi Brian, here is a technique to draw a diamond shape. Basically you want to set up some lines in a repeatable pattern, and use Construct/Planar to fill in planar surfaces between some sets of those lines.

This example is probably a pretty poor diamond, but it should get the technique across:

Download video (2MB) or play below:





Hope this helps!

- Michael
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 From:  Brian (BWTR)
2227.4 In reply to 2227.3 
Thanks mate.

That will keep the brain working this pm!

Brian
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 From:  Brian (BWTR)
2227.5 In reply to 2227.4 
And, who cares if Brians design is not possible?

Great added learning ---

Brian

EDITED: 31 Dec 2008 by BWTR

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 From:  Michael Gibson
2227.6 In reply to 2227.5 
The famous 82-carat Rohde diamond!

If you had a real one like that you could probably buy a lot of beers with it. :)

- Michael
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 From:  Brian (BWTR)
2227.7 In reply to 2227.6 
I don't get called Cecil for nothing!
(Pity he could not spell our name correctly though!)

Brian
(see Bangle thread)
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 From:  coi (MARCO)
2227.8 In reply to 2227.7 
hi brian,

if you really want to dig into gemstone design, be sure to check out this website:

http://www.rockhounds.com/rockshop/gem_designs/design_index.shtml

a rather amazing collection..


actually, i did a prototype based on such a design...(and with the help of moi)..

workflow would be something like this:

gemcad->rhino(dxf to 3dm)->moi->pepakura->cutout model..fiddling around with some foils and fresnel-things





cheers,
marco
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 From:  Frenchy Pilou (PILOU)
2227.9 
---
Pilou
Is beautiful that please without concept!
My Gallery
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 From:  Paolo (PAOLOLOBBIA)
2227.10 In reply to 2227.5 
Hi Brian,

These are the technical specifications of
a briliant cut diamond

Sorry it's written in Dutch
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 From:  Brian (BWTR)
2227.11 In reply to 2227.10 
Thanks all.

So much stuff in my To Do folder!

Brian
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 From:  WillBellJr
2227.12 In reply to 2227.5 
Hey Brian, give it a metallic material, make it glow hott white and enter it into the 50's SciFi contest! LOL

Great alien saucer if I say so myself :-P

-Will
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 From:  Colin
2227.13 In reply to 2227.1 
Hi Brian,

Here's a 3DM file of a Diamond from one of the Rhino jewellery Plugin's I've got.
I'm also including a picture that contains the angles & proportions that are used for cutting an "Ideal Diamond".

Here's a link that might also prove useful.
http://www.preciousmetals.com.au/

Hope all of this is of help, Colin
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 From:  Brian (BWTR)
2227.14 In reply to 2227.13 
Thanks Will and Colin.

Just where could rendering alternatives end up?

Brian

EDITED: 31 Dec 2008 by BWTR

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 From:  yannada
2227.15 
here is a another cool source with 3d models of real gemstones including .3DM, as well as jewelry related information

http://www.3dlapidary.com/HTML/Collections.htm
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 From:  Brian (BWTR)
2227.16 In reply to 2227.15 
Yannada (Michael?)

Those 3DM Rhino files (3dlapidary) do not open in MoI?
(OK in Carrara)

Any explanations?

Brian
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 From:  Michael Gibson
2227.17 In reply to 2227.16 
Hi Brian,

> Those 3DM Rhino files (3dlapidary) do not open in MoI?


That usually means that the objects inside of the 3DM file were polygon mesh objects and not NURBS objects.

There are various different kinds of things that can be stored in a 3DM file such as NURBS objects, polygon meshes, spotlights, dimensions, etc....

MoI only deals with NURBS and single point objects, it will skip any polygon mesh objects that are in the file and I think those particular files only have those kinds of objects in them.

Those polygon mesh objects can be converted in Rhino into NURBS objects by using the meshtonurb command on them. That conversion will allow MoI to read in those objects.

- Michael
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 From:  yannada
2227.18 
oops sorry for the incontinence caused, I should know that...
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 From:  Brian (BWTR)
2227.19 In reply to 2227.18 
Well one needs something to grumble about I guess!

Brian
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 From:  TwinSnakes
2227.20 
If you want to do accurate jewel stone modeling you need a cut sheet. It will give you the proper angle/dimensions for a particular cut of precious stone.

See this post for pics and an example file.

http://moi3d.com/forum/index.php?webtag=MOI&msg=623.34
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