| Aluminium profile with inverted normals [message #4017] Thu, 23 April 2009 08:31 UTC |
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I am stuck. Trying to use Blender's "Recalculate normals inside/outside" does not help. Whatever I do, there seem to be inverted normals. Using AccuTrans 3D and MeshLab does not reveal anything unusual to the untrained(!) eyes.
Would be happy for any help.
Attachment: test.3ds
(Size: 25.31KB, Downloaded 126 time(s))
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| Re: Aluminium profile with inverted normals [message #4018 is a reply to message #4017 ] Thu, 23 April 2009 09:58 UTC |
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An additional note: I'll attach a snapshot of a view. This is an aluminium profile piece that is non-convex and has a cylindrical hole through the profile. Maybe this is impossible to get right by itself.
NB: The final object to be processed will consist of numerous of these profile pieces. The uploaded piece is a minimal test case for me.
Attachment: test.png
(Size: 6.02KB, Downloaded 171 time(s))
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| Re: Aluminium profile with inverted normals [message #4100 is a reply to message #4018 ] Mon, 27 April 2009 21:44 UTC |
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Still hoping for some insight - or is this a question with a completely obvious answer? 
--Warper
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| Re: Aluminium profile with inverted normals [message #4124 is a reply to message #4106 ] Tue, 28 April 2009 11:57 UTC |
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Hi Whystler,
I've seen some other posts by you - thanks for answering.
Did you mean to suggest another forum? It tells me "3D Design" as the forum I actually posted in!?
Warper
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| Re: Aluminium profile with inverted normals [message #4156 is a reply to message #4124 ] Wed, 29 April 2009 09:02 UTC |
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Hi Warper,
i took a look at your model and fixed it for you. You have to beware of the unit size though, and perhaps rescale it a bit because it doensn't meet our minimum sizes.
Hope this helps,
Cheers,
Ralph
Shapeways International Customer Service Manager
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| Re: Aluminium profile with inverted normals [message #4169 is a reply to message #4156 ] Wed, 29 April 2009 11:49 UTC |
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Hi Ralph,
Thanks a lot. Even more interesting than the fixed file would be the reason for the problem and how I could have seen and fixed it myself. Anything simple like "look closer for individual inverted normals"?
EDIT: The reason for the question of course is that I want to have a model built that consists of ~30 such profile pieces. Without myself being able to fix them would be prohibitive to testing out designs.
Warper
[Updated on: Wed, 29 April 2009 13:41 UTC]
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