Honeycomb pattern on dome shape  1-20  21-34

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 From:  ChewyPixels
3786.1 
Hey all,

I'm trying to model the honeycomb pattern on this microphone shown in the attached pic. I just can't seem to figure out how to tackle the dome shape. The issue is trying to keep the scale of the hexagons at the same scale or with minimal size reduction.

I also attached a pic of where I'm currently at. Notice the red square area showing the non-hexagon shapes. I figured this might be the way to go.

Any ideas? I'm very new to Moi modeling so any tips or pointers would be greatly appreciated.

Thanks,
-Jesus B.
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 From:  macray
3786.2 In reply to 3786.1 
the photo looks like the vertical 'lines' just continue straight up and the upper rim is cut/ hidden behind the metal bar that's coming up from the sides and goes over the top of the mic. so try to go on straight up instead of scaling it down towards the center on top... and cut/ cover the pattern in the middle.

Can you understand my description?

What you see is what you believe - so don't. (from an Amiga500 demo)
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 From:  ChewyPixels
3786.3 In reply to 3786.2 
Yeah, I tried that but won't work for this project. Mic is going to be seen at various angles.

I'll figure this one out somehow.
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 From:  Michael Gibson
3786.4 In reply to 3786.3 
Hi Jesus, I don't really know of an automatic way to produce something like that, you're probably going to have to do it by manual arrangement.

But it's a difficult process to try and keep the same rigid shapes while at the same time trying to compress the overall organization flow down to a single point.

Like macray mentions, the real microphone doesn't try to do that and instead tries to keep the pattern going over the top instead of compressing it down to a single point at the top. So that means that you're looking for some kind of different pattern than the real microphone...

- Michael
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 From:  ChewyPixels
3786.5 In reply to 3786.4 
Thanks Michael. Yes, I figure I'll just have to experiment and see what works best.

Thanks,
-Jesus
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 From:  Frenchy Pilou (PILOU)
3786.6 
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 From:  Marc (TELLIER)
3786.7 
I think Pilou has a good hint there, there is a hex dome here for example:
http://sketchup.google.com/3dwarehouse/details?mid=d63037b783145b7e2137e32e8ebf2b1&prevstart=0

You can import data from a polygonal (obj.) file in moi with this utility:
http://kyticka.webzdarma.cz/3d/moi/#importobj

There is a couple of sketchup->obj plugins available I think...

Nice subject!

Marc
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 From:  steve (STEVE_HOME)
3786.8 In reply to 3786.7 
>>I think Pilou has a good hint there, there is a hex dome here for example:<<


That is a mixture of 5 and 6 sided which is easy to construct. The OP wants all 6 sided, which cannot be constructed if the 6 sided need to maintain correct shape/ size.


- Steve
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 From:  eddi
3786.9 In reply to 3786.7 
Dont not forget best polymodeler Wings3d
and this tutorial for self made:
http://home.comcast.net/~chronosphere/tut-wings-bucky.htm
(plugin (geodome) from the tutorial are included in the latest version Wings3d)
after you can use tool "Importobj" recommended by Marc
or "ObjTo3dm" : http://dave-l.com/grafix/index.php?page=objto3dm

EDITED: 24 Sep 2010 by EDDI

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 From:  Michael Gibson
3786.10 In reply to 3786.9 
Hi eddi,

> or "ObjTo3dm" : http://dave-l.com/grafix/index.php?page=objto3dm

That's probably not going to work since it looks like it creates polygon mesh objects in the 3DM file and not NURBS objects.

MoI only reads NURBS objects from 3DM files and skips over other kinds of object types like spotlights, dimensions, polygon meshes, etc....

- Michael
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 From:  eddi
3786.11 In reply to 3786.10 
Yes, Michael you are right,
it is known, Moi and polygon does not go.
But both tools bring lines from polygons (created in Wings3d) in to Moi.
Both tools offer a different alternative.
Obj23dmWireframe = separate line segments, filesize larger

EDIT:

HE
***ObjTo3dm = closed line segments, filesize smaller, no luck import geometry with polys less than 5 sides
***

Best alternative for geodome could be Grasshopper, in continuous honeycomb geometry.
http://api.ning.com/files/tNXd3jNkkDzdZmhUQDh7YDdlF2KdESpiSaTFPw8Pu06N5PtTrbnbBpxirrXxEQlj/CUPULOO8.JPG

EDITED: 24 Sep 2010 by EDDI

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 From:  Michael Gibson
3786.12 In reply to 3786.11 
Hi Eddi,

> no luck import geometry with polys less than 5 sides

It sounded like the main goal of that other converter was to make a mesh object in Rhino, but mesh objects in Rhino are limited to 3 or 4 sided polygons.

So it looks like when possible (< 5 sides) that program will convert to mesh objects in the 3DM file.

But that's interesting that it makes a closed polyline for each face that cannot be directly converted into a Rhino mesh object.

- Michael
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 From:  eddi
3786.13 In reply to 3786.12 
Trick in Wings3d,
select edges, use cut(RMB) through 2, export as obj, (colors not correct converted)
In Objto3dm activate under options "convert NURBS to polygons"
Import in moi as closed polylines.

-EDDI
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 From:  lyes (BLYESS)
3786.14 In reply to 3786.1 
hi jesus here is a way how to do it :





1 : create cylinder and sphere and bloon-union, trim with red line to make just half (surface sim should be where the red line is), shrink surface,
make blue lines where the end controlpoints is .
make green lines lenght =~= half Circumference off cylinder ( yelow curve )=( 3.14 x D) / 2



flaten the surfaces :
move end controllpoints off surfaces to end off green lines
trime with hexsagone pattern
move back the the end controllpoints and you should get good shape

EDITED: 2 Oct 2010 by BLYESS

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 From:  PaQ
3786.15 In reply to 3786.14 
Amazing trick lyes, thanks to share it !!!!
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 From:  DannyT (DANTAS)
3786.16 In reply to 3786.14 
Very clever technique lyes! well done.

Cheers
~Danny~
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 From:  lyes (BLYESS)
3786.17 
Hi all here another trick : make patch with 1 or more cpts in the midel trim with a pattern scale rotate move the midel cpts or extract curves
thank you


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 From:  Frenchy Pilou (PILOU)
3786.18 
Vasarely revival :)
http://www.vasarely.com/
---
Pilou
Is beautiful that please without concept!
My Gallery
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 From:  lyes (BLYESS)
3786.19 In reply to 3786.18 
Hi Pilou thanks for the link I didn't know about this artist but I have seen panels like that and I was wondering how is than
I suppose creating curves like this we can call it VASARELY.


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 From:  Jamie (FUTUREPROOF)
3786.20 
Thanks Lyes

love the honeycomb pattern solution. Really helpful.

Jamie
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