| manifold stuff [message #5984] Fri, 21 August 2009 15:43 UTC |
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Hi, I've uploaded a .stl file which was fine, but then I took the same file and scaled it down and ever since whenever I upload it, I get the message that only manifold geometry is allowed, but I cannot find any non-manifold geometry, can anyone help me out?
cheers,
Bobby
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| Re: manifold stuff [message #5986 is a reply to message #5984 ] Fri, 21 August 2009 20:07 UTC |
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It's way to small mate...
X: 0.011
Y: 0.040
Z: 0.014
If you uploaded in milimeters, it would be 0.004cm
If you uploaded it in centimeters it would be 0.040cm tall.
if you uploaded in Inches it would be 1.01600mm tall.
Your vertices are so close together that they are litterally right on top of each other.
I think you scaled it down a wee bit too much.
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| Re: manifold stuff [message #6032 is a reply to message #5986 ] Mon, 24 August 2009 09:47 UTC |
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Hey thanks for taking a look.
The previous upload was twice this size, and when uploading I choose 'meters ' which should make it 4 cm, right?
I exported it from lightwave.
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| Re: manifold stuff [message #6038 is a reply to message #6032 ] Mon, 24 August 2009 13:01 UTC |
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Yes, that is correct. But I still think that it is scaled down so small that the individual vertices are just all on top of each other. From what I understand of Lightwave, a default unit of measurement (UOM) is in Meters. However, Lightwave is not a CAD program so that unit is for reference only. And when you export to and STL file the Unit of measurement is arbitrary. So yes, in theory, you are correct. Scaling your modle down to .040M would be 4CM. You should just try and export the model at 4M (Or 4 UOM) from Lightwave. When you upload it, just choose CM as the UOM and it should work.
One caveat though, if you have saved your model at the .040 tall factor, you may not be able to scale it back to full size again.
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| Re: manifold stuff [message #6076 is a reply to message #6038 ] Thu, 27 August 2009 10:57 UTC |
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Hey thanks, but there is no CM option when uploading , just inches, meters and millimeters.
So i'll end up with a giant statue or a microscopic version 
cheers,
Bob
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| Re: manifold stuff [message #6086 is a reply to message #6076 ] Thu, 27 August 2009 16:08 UTC |
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Whoops... hehe. I don;t know why I keep thinking there is. sorry. however, the same principal applies.
You could scale it to 1.57480315 (4cm) and then upload it in inches. (More like 1.575 if you need to truncate it.)
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| Re: manifold stuff [message #6111 is a reply to message #6086 ] Fri, 28 August 2009 13:18 UTC |
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Okay I'll take a look into it, still not sure if I totally get it, since lightwave also has the option to choose either cm, m or inches.
Confusius say;' scale is relative, but what to relate to?'
Thanks for the help, much appreciated.
cheers,
Bobby
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| Re: manifold stuff [message #6113 is a reply to message #6111 ] Fri, 28 August 2009 15:51 UTC |
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"relative" simply means that the represented unit of measurment is variable. CAD programs like AutoCAD actually contain dimensional data inside the DWG files it creates. I.e. if you say it is 4cm tall, it contains data in the file that states that it is 4cm tall. An .STL file (and allot of other 3D formats) do not contain dimensional data. You could say it was 4 whatever and when you go to some sort of CAM (Computer aided manufacturing) program or machine like the 3D printers here. That 4 can be 4mm, 4cm, 4m, 4km, 4in, 4ft, 4miles, etc, etc, etc.
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