Dome with smooth edges

pilou

Is there a plugin to create a Geodesic Dome.

Seems you have someone in the Components menu Shapes or in 3Dware house

Gaieus

If you want to know something about geodesic domes, our fellow member Taff Gogh is to search for. This is his 3D Warehouse contribution:
http://sketchup.google.com/3dwarehouse/cldetails?mid=1f33552966b6f22224e5217d8a2e013a
and his Google Groups for Geodesic Domes:
http://groups.google.com/group/geodesichelp

But unfortunately, Al, I would doubt that a different shape on the top would help (albeit who knows?) It's where the image itself should also shrink to infinity. So speaking of skies, maybe one with a pure, blue colour on the very top could produce some not noticeable turbulence?

charly2008

Thanks for all your help. I will try out UVMapper.

Al Hart

@gaieus said:

Yes, in the meanwhile I edited my previous post, too.

Solution - put a cap on the top.

Can you show us a view from the top of the dome with a cap on top.

(Or was that a joke?)

Thanks,

Al

Al Hart

Thanks for your help on this Gai.

We need to get Whaat to recognize the triangles at the top, and assign the UV coordinates differently.

Alternatively, you could start with a Geodesic Dome which uses the same size for all triangles. Would Whaat's plug-on work for Geodesic Domes?

Is there a plugin to create a Geodesic Dome.

We tried to solve this when we were trying to improve the O3D dome for viewing panoramic images (which has the same problem at the top and bottom), but we weren't able to do it properly.

driven

2004 by Gavin Kistner- Geodesic_SketchUp.rb

don't remember where or when I got this, have you tried it?

john

pilou

Taffgoch serial domes is amazing

His PDF is a true gem!

Gaieus

Al, see the image I attached to that post. There is a yellow "cap" - just hiding the fact that we cannot properly UV Map that part.

Maybe half joke but at the same time, if you can find out something to put there, can be a workaround.

TIG

@gaieus said:

Al, see the image I attached to that post. There is a yellow "cap" - just hiding the fact that we cannot properly UV Map that part.

Maybe half joke but at the same time, if you can find out something to put there, can be a workaround.

This is as it would be in the 'real-world' - you'd have a special cap-stone or finial, simply because you can't use smaller and smaller tiles or stone to finish it - The builder WILL use a single 'thing'...

Gaieus

Certainly. Even the rest of the tiles mapped spherically is impossible.

Al Hart

I see my problem better now.

I don't want a texture mapping which gets smaller and smaller at the top. I want a texture mapping which is uniform over the entire dome - As if you placed an actual carpet on the dome.

To do this properly, I would probably need to make the dome out of hexagons, and have a "hexagon tileable" pattern to place on it.

I'm sure people must to this sometimes, but it is probably more difficult than I think.

driven

d12dozr

@unknownuser said:

I do this a lot , if that's what you mean

And just HOW do you do that? I believe that is what he means...

driven

@d12dozr said:

And just HOW do you do that? I believe that is what he means...

probably the hard way,

I strip out the annular rings from one sphere, make a group, rotate copies until I like the pattern, explode the lot, slice off the top (3 or 4 rings), drape with sandbox, slice off the top of a plain old 'follow me' sphere (just 1 or 2 rings), offer up the sandbox hat (Gai was right, just a hat), decide how far to use the pattern, trim, explode, add projected material off a number of different angled surfaces I paint ( and make unique before projecting), decide what I like, purge all the test materials, and that's it...

I make these cages for pipe along path objects, and just thought I try draping and rendering one night,
foolishly I always bin the makings and have to start from scratch each time, but I'll keep this drawing and use it as a component, nearly everything is grouped so have a play.
like this

You only need to change the top 1 or 2 rings to completely change how the texture gets projected, but I have no idea why.
On this one I also copy pasted the cylinder off the standard one because the texture worked better on that one, again no idea why.

john

this is why I normally use this technique (it's for a 3D printing test in stainless steel)

I haven't cleaned this up, but should be OK

d12dozr

Thank you for the detailed explanation.

driven

@d12dozr said:

Thank you for the detailed explanation.

no problem, don't know if it helps Al (I know next to nothing about UV mapping, but I just saw this sitting on the desktop and may as well add it
I think explains the basic construction technique more clearly

Al Hart

I finally found geodesic_sketchup.rb script on

http://www.crai.archi.fr/rubylibrarydepot/ruby/em_geo_page.htm

It created a spehere with even triangles, so the material does not bunch up at the top or bottom. Now I just need to find a pattern which is tileable in a triangular pattern. (I turned on the hidden lines here so you could see the actual triangles which form the sphere)

Here's what I was trying to get - a sphere which would take a bumpy pattern, and spread it out well.

TaffGoch

Hello, all,

I've been "lurking" on this discussion, and see that Al has posted an image of Simon Thomas' sculpture, "Orb"...

As Gaieus mentioned, it is, indeed, based on a geodesic sphere (class-I, frequency-2, if you're familiar with the terminology.)

Several other of Thomas' sculptures are compelling, and would make for interesting SketchUp exercises.

See here, for descriptions: The art of numbers

For geodesic design in SketchUp, I often use an online java applet that can output a text file of the x,y,z coordinates for each vertex, which I then import into SketchUp, as a "point cloud"...
Thomson Problem

...just another (powerful) geodesic resource, should you be looking for such.

Taff