Full Version: Some modeling questions...

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Hi Curious,

> *** 2A- Has brand new geometry in the detail region and on this I am not able to apply any kind of fillet at
> all!!! Could someone please tell me why I can't apply even .02 fillet on the blue model? What is defective
> on it compared to the green model?

Well one problem is it's not very good quality surface geometry especially at the pointy skinny spots which are already difficult things to fillet.

For example this pointy part here:


That is a stressed surface with one side of it collapsed down to a single point. The surface has a structure like this:



The problem with that is that NURBS surfaces are inherently 4-sided things. To get a 3 sided shape it is possible to squash one edge down to a point but it's generally good to avoid that when possible. It's ok when it's the pole of a sphere or a cone or surface of revolution but when you have a shape that is coming from a 2D profile from one direction like you have here the best quality surface is going to be an extrusion that is trimmed.

So good quality geometry for that kind of shape should look like this:


The underlying surface is an extrusion and the pointy areas are formed by areas of the extrude being trimmed or booleaned.

- Michael

Image Attachments:
curious_surface1.jpg  curious_surface2.jpg  curious_surface3.jpg 

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Hi Curious,

re:
> *** 2A- Has brand new geometry in the detail region and on this I am not able to apply any kind
> of fillet at all!!! Could someone please tell me why I can't apply even .02 fillet on the blue model?
> What is defective on it compared to the green model?

I've attached a version of this with simplified extrusion geometry like described above and this should have a better chance at being filleted although it's still a difficult case.

But if you select this you should be able to get a fillet although you can see the juncture at the sharp points is a little weird:





- Michael

Attachments:
jeez-1_2_3dm.zip

Image Attachments:
curious_fillet1.jpg  curious_fillet2.jpg 

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Thanks Michael for all your explanations. I might come back with some follow up questions.
Either way you are amazing!!!!! Thank you and the community.

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