| Little help needed [message #22430] Mon, 10 January 2011 21:43 UTC |
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Hi all,
I've been having some issues lately with uploading.
since 2months several models of mine won't shop up in my shop how to have to be.
Some parts of the model are missing.
i know this could be because of the shells - when using 3ds max,, you will always have shells,,, using union screws your model when having more then 1000poly :S -
but before i never had problems with shells,, and shapeways accepted it,, and showed it perfectly.
http://www.shapeways.com/model/199089/1snel.html?gid=ug16518
as you can see on the model,, some seats are gone....
but if you check the file in the attachment,, you see there are several more seats then in the model that is uploaded (same file)
Can somebody check my file and see how I or we can fix this?
thanx in advance
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| Re: Little help needed [message #22449 is a reply to message #22445 ] Tue, 11 January 2011 11:24 UTC |
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Stijn,
thanc for trying to help, but no luck i'm afraid!
normals aren't a problem for me!
when object is flipped,, i press the "reset xform" and then i can see wich objects are flipped,, by selecting the model then, i can flip normals!
so everything is in the same direction!
Does somebody know what to do?
thanx in advance
Mitchell
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| Re: Little help needed [message #22450 is a reply to message #22449 ] Tue, 11 January 2011 12:41 UTC |
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You've got overlapping faces, probably caused by a symmetry going wrong, resulting in pieces being merged with broken geometry and thus consequentially getting trashed away.
Kaetemi
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| Re: Little help needed [message #22451 is a reply to message #22450 ] Tue, 11 January 2011 12:44 UTC |
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Kaetemi,
but why is this happening to some of the seats,, and not all?
cause all of the seats are the same?
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| Re: Little help needed [message #22453 is a reply to message #22430 ] Tue, 11 January 2011 12:45 UTC |
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One thing I notice about your model is that the left and right edges of the adjacent seats are right on top of each other. That's always asking for trouble, but I don't think it would make random ones disappear. It does sound like a bad transform/mirror but if you've already looked at that I'd send them separate from the car and see if the error still occurs.
I also noticed you model is (fixed) with Netfabb? I tried using Netfabb for awhile because I know Shapeways uses it, so I thought it would be more compatible, but I notice it often breaks complex models that uploaded fine before! Errors like the first one I described with coincident faces can become even worse when Netfabb tries to join everything together. It makes a mess that will confuse MeshMedic.
Try making the components work first before you combine everything.
Aaron - 40westdesigns.com/blog
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| Re: Little help needed [message #22456 is a reply to message #22454 ] Tue, 11 January 2011 12:54 UTC |
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Ok, thanx!
i'm going to try fixing the overlapping stuff!
i hoped netfabb would have solved those issues for me!
I allready got the plate below the seats to have none overlapping faces!
now the seats!
Kaetemi, which program do you use?
Mitchell
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| Re: Little help needed [message #22457 is a reply to message #22456 ] Tue, 11 January 2011 13:09 UTC |
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It's the xView feature that's built into 3ds Max 2010.
Parallel overlap is somewhat difficult to process, because floating point inaccuracies will lead to undefined states.
Two parallel overlapping faces that share an edge might be a possible cause, as this would create an undefined state where the resulting zero-volume volume where the faces overlap is neither correctly oriented nor inverted, nor does it have a slicing line for the planes, nor does it connect two meshes to each other.
Or maybe something else, but overlapping parallel planes are never a good idea. =)
As easily demonstrated by 3dsMax's ProBoolean:
(Netfabb fixes the above issues though...)
[Updated on: Tue, 11 January 2011 13:34 UTC]
Kaetemi
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| Re: Little help needed [message #22458 is a reply to message #22457 ] Tue, 11 January 2011 13:34 UTC |
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thanx Kaetemi!
tried to weld the vertics that were shown by xView!
now i think i've found the problem!
My model is made 1:1..... so the points are not that close to eachother... xView says only 34 vertics are overlapping..
now the problem is (what i think) is that i scale my model down to 1:160!
this way all vertics will be scaled down, and if the tolerance isn't high enough, mesh medic would think they overlapse eachother
could that be the thing?
edit: this is the stl file before being scaled down and before netfabb fix
[Updated on: Tue, 11 January 2011 13:39 UTC]
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| Re: Little help needed [message #22459 is a reply to message #22458 ] Tue, 11 January 2011 13:48 UTC |
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Which program and file format do you use for downscaling?
Kaetemi
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| Re: Little help needed [message #22460 is a reply to message #22459 ] Tue, 11 January 2011 13:50 UTC |
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STL, by using netfabb!
when i did in 3ds max,,, there was even less model when uploaded to shapeways!
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| Re: Little help needed [message #22461 is a reply to message #22460 ] Tue, 11 January 2011 13:54 UTC |
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Okay, here's a trick:
- Open stl in MeshLab (hit ok on a warning)
- Save as x3d (remove the normal checkboxes)
- Scale 0.00625 (it's hidden in some menu that says normals, curvature etc)
- Save
- Open x3d in netfabb
- Save as stl binary
- ???
- Profit!
3dsmax and netfabb are bad at heavy scaling operations...
MeshLab probably does some sanity checks while scaling. Saving as x3d also seems to have higher precision. Netfabb is particularly good at properly saving as STL. And don't go for uploading directly as X3D in this case, because then you'd have to scale it down even further to meter units.
[Updated on: Tue, 11 January 2011 14:03 UTC]
Kaetemi
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| Re: Little help needed [message #22464 is a reply to message #22462 ] Tue, 11 January 2011 14:30 UTC |
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Kaetemi,
when i scale it in meshlab,, and open it then in netfabb,, it says it's like 100x as big as the 1:1 scale?
when uploaded:
The size is 2570820.10 x 1384423.15 x 132544.11 cm / 1012133.90 x 545048.48 x 52182.72 inch.
oftewel, veelste groot?
ik heb precies zoals je zei gedaan in meshlab?
save x3d,,, scale 0.00627 save xd3
en als ik hem dan in netfabb open is hij ineens heeel groot ipv heeeel klein?
[Updated on: Tue, 11 January 2011 14:49 UTC]
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| Re: Little help needed [message #22467 is a reply to message #22466 ] Tue, 11 January 2011 14:58 UTC |
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Ik heb
MeshLab 1.3.0b en netfabb 4.5.0
Kaetemi
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| Re: Little help needed [message #22468 is a reply to message #22467 ] Tue, 11 January 2011 15:00 UTC |
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hmmm die heb ik ook!
heb je nog bepaalde settings aangepast @ meshlab of netfabb?
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| Re: Little help needed [message #22469 is a reply to message #22468 ] Tue, 11 January 2011 15:02 UTC |
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Wat als je in MeshLab rechtstreeks naar stl export na het scalen?
Kaetemi
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| Re: Little help needed [message #22470 is a reply to message #22469 ] Tue, 11 January 2011 15:05 UTC |
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Dan werkt hij wel in Netfabb!
ik ga eens proberen als ik hem nu upload!
thanx 
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| Re: Little help needed [message #22472 is a reply to message #22470 ] Tue, 11 January 2011 15:09 UTC |
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YOU ARE MY HERO!
thank you a lot!
it worked!
paying and ordering it now!
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| Re: Little help needed [message #22474 is a reply to message #22430 ] Tue, 11 January 2011 15:33 UTC |
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haha guys if you don't write in English how could others learn? 
@Jettuh see attached in case some parts still disappear.
http://www.3Dizingof.com
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| Re: Little help needed [message #22475 is a reply to message #22474 ] Tue, 11 January 2011 15:36 UTC |
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Dizingof,
if you follow kaetemi's post with the pictures, you get a file where nothing is dissapearing!
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Search
wtf your amazing!
