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Old 15th November 2012, 11:07 AM   #1
Hans_Petter
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Default Overlapping models

Say I want to add a stud to a rod. The simplest way is to make the stud as a separate model and just sink it into the side of the curved surface of the rod. This will look as intended. However, there will be partly hidden surfaces and it might be more elegant to join the two models properly rather than sticking one into the other and leave it there. Is there an easy way to accomplish this? Manual editing, adding the extra vertices to truly merge it all into one model takes time and tends to compromise perfectly planar surfaces.
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Old 15th November 2012, 11:29 AM   #2
blackjak
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Default Re: Overlapping models

I would also like some info on this. What are the downsides to leaving an object buried in another object
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Old 15th November 2012, 12:13 PM   #3
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Default Re: Overlapping models

Select the major object, then the minor one and do a "Object - Boolean - union"

And the two parts should merge to one.

Note, see http://www.inivis.com/forum/showthread.php?t=6721 for info on best way, think big.
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Old 15th November 2012, 01:38 PM   #4
Hans_Petter
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Default Re: Overlapping models

Thanks Mossie
I'll scale everything up before doing a proper boolean merge if that's what it takes to avoid anomalies.

Regarding the question asked by "blackjak" I also wonder to what extent the clean-up matters in terms of computational cost / frame rates. Obviously, the higher the number of vertices / surfaces the higher the computational cost. However, a "clean" model may very well end up with more vertices than one where a cylinder is simply stuck into another cylinder. The proper matrix of surfaces requires new and possibly additional vertices, particularly when two "curved" models are properly joined. Is there a simple way to judge this? I'm thinking of number of surfaces / vertices (polygon count) or total file size.

In any event, a totally hidden surface should certainly be deleted since it wastes resources without contributing anything.
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Old 15th November 2012, 02:10 PM   #5
Mossie
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Default Re: Overlapping models

Number and complexity of shapes will always vary and thus very difficult to determine effects.

I did a number of tests recently in out flight sim and worked out that even 244K polys only dropped fps to 36. So a very wide scope in that game.
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