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Alejarra
Posts: 1
Registered: ‎07-10-2012
Message 1 of 5 (204 Views)

Negative extrusions lead to mesh failure

204 Views, 4 Replies
07-10-2012 02:29 AM

Hello,

 

I've stumbled upon a rather peculiar issue:

I've modelled part of a ship's deck, it consists of rather simple geometrich shapes(Plates, knee brackets and profiles).

However, when i model the assembly and do some negative extrusions in order to get the model how i want it, it leads to a face failure during mesh generation.

 

Has anyone experienced a similar problem?

 

Thx,

 

Alejandro

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JDMather
Posts: 26,602
Registered: ‎04-20-2006
Message 2 of 5 (199 Views)

Re: Negative extrusions lead to mesh failure

07-10-2012 04:07 AM in reply to: Alejarra

Attach the file(s) here.

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stephengibson76
Posts: 1,095
Registered: ‎08-01-2006
Message 3 of 5 (194 Views)

Re: Negative extrusions lead to mesh failure

07-10-2012 04:39 AM in reply to: Alejarra

instead of taking extrusion cuts in the assembly, try starting a new part, derive the assembly into the part and then make your cuts.  

 

Im presuming you have an as built deck and you are modifying it?  This method will ensure you keep a record of your as built structure as well as a detailed model of your new structure

Stephen Gibson



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mcgyvr
Posts: 6,853
Registered: ‎12-01-2004
Message 4 of 5 (181 Views)

Re: Negative extrusions lead to mesh failure

07-10-2012 09:13 AM in reply to: stephengibson76

negative extrusions...never heard that one before.

 

 

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Down with IDW/DWG files..... Long live 3D PMI... Hurry it up already..
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JDMather
Posts: 26,602
Registered: ‎04-20-2006
Message 5 of 5 (172 Views)

Re: Negative extrusions lead to mesh failure

07-10-2012 12:53 PM in reply to: mcgyvr

mcgyvr wrote:

negative extrusions...never heard that one before.

 

 



I assumed the OP's native language is not Engish, one reason I requested a file - to be sure what we are talking about.  Geometry is what it is and not dependent on what we call it.

I have a textbook textbook that referrs to holes as negative cylinders. (Technical Drafting - Geisecke, et. al)

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