how would you model this ???  1-20  21-22

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 From:  schneich
5630.1 
these buttons seem simple, but how to achieve the transition from corner to perfect roundness without creating unwanted edges that can be seen in the renderer...


maybe iam to tired and the answer is abvious...




cheers


t.


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 From:  BurrMan
5630.2 In reply to 5630.1 
I made this by squaring up a sphere...



You may have to look at it like there is no such think as a "sharp" in real life...

Maybe the best way will be to just network a couple curves for the shape you want? The sphere thing may get tedious for the shaped corner and edge buttons. :o
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 From:  BurrMan
5630.3 In reply to 5630.2 
Network.......
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 From:  schneich
5630.4 
nice, but not what i need.. there is no transition of the corner to a round edge, i start to believe that it cant be done in moi :-(


cheers


t.
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 From:  Michael Gibson
5630.5 In reply to 5630.4 
Hi torsten, things that are kind of puffy or semi-blobby looking can often be more difficult to model in NURBS because they usually can't be done only by using 2D profile curves.

But usually with transitions you will be looking at fillets or blends to do the transition area. Fillets tend to have problems when they sort of evaporate to a single crown point like you've got here, so probably putting in blends for those areas might work better.

- Michael
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 From:  Michael Gibson
5630.6 In reply to 5630.1 
I've attached an example using blends for the corner areas - this retains some of the diamond-like pattern that is present in the original buttons.

If you wanted to reduce that, you would probably want to make the initial extrusion shape to have its middle area be flatter across a wider portion of it, the initial profile that I extruded was like this:



If you made the center flatish area to be a bit larger that would change some things about the resulting shape too.

But also sometimes it can be easier to do things that are puffy or blobby looking in a polygon modeling program rather than in NURBS, they are more focused on a kind of sculpting like mechanism which works well for organic shapes.

- Michael

EDIT: put in 3DM attachment that I forgot initially.

EDITED: 6 Jan 2013 by MICHAEL GIBSON


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 From:  bemfarmer
5630.7 
Here is my entry, using Pillow script from late 2011.


EDITED: 9 Aug 2013 by BEMFARMER

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 From:  Michael Gibson
5630.8 In reply to 5630.1 
Another possible approach is to make a loft through some sections like this where the curved corners are gradually expanding on each layer:






The loft initially has an open top, I then turned on surface control points and collapsed the circle edge down to a single point using the edit frame (there is a "flat" snap that you can use for that) and then also flattened that squished down point to be in the same plane as the next inside row of points, having a collapsed point be in the same plane as the next level of points will make a smooth looking tip instead of a sharp point.

For this kind of a thing you want the sections to only gradually change in shape, if you have too big of a change from one section to the next it can make things bumpy. Using Loft style = loose can help reduce bumpyness.

- Michael

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 From:  Mike K4ICY (MAJIKMIKE)
5630.9 
I know that the desired shape here is quite specific: a more rounded domed center that morphs to more pinched corners.

With NURBS construction there are so many ways to achieve surface configurations, each having their own character.

Though, the examples I give are more rounded on the corners, some of the possible construction methods may hold just as viable:



http://moi3d.com/forum/index.php?webtag=MOI&msg=4388.107
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 From:  BurrMan
5630.10 In reply to 5630.9 
""""""""""there is no transition of the corner to a round edge"""""""""

But that statment along with:

"""""""""With no visible edges/seams""""""""""""

Does not exist..... Hence, all the examples you see have rounded corners, or "concave before convex" at the corner points.
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 From:  schneich
5630.11 In reply to 5630.10 
ok then please tell me what kind of geometry the buttons on the rendering show ?!

cheers


t.
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 From:  schneich
5630.12 
the pillow script it was :-)


thanks!!!!


t.


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 From:  BurrMan
5630.13 In reply to 5630.11 
"""""""""ok then please tell me what kind of geometry the buttons on the rendering show ?!"""""""""""

They show hard edges where the transition is... I thought you wanted to "fix" that...

Looks like you got what you wanted from Bemfarmers script.
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 From:  beanworks
5630.14 
different approach:


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 From:  beanworks
5630.15 
BTW, I thought it was pretty obvious BEFORE I started working it out. Took about a dozen tries.
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 From:  Mike K4ICY (MAJIKMIKE)
5630.16 
Nice!

Okay, now try it on the odd-shaped corner rounded buttons. ;-)
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 From:  beanworks
5630.17 
looks like it works on rounded corners too:


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 From:  Don (DON_CHEKE)
5630.18 In reply to 5630.14 
Is this different approach a network? You show your result but I am not clear how you did it.

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Don Cheke
Visit: Textual Creations
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 From:  beanworks
5630.19 
Here ya go. Puffy buttons in 18 easy steps. Its actually very easy


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 From:  Don (DON_CHEKE)
5630.20 In reply to 5630.19 
Very nicely done. Thanks for sharing your method.

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