NVil Forum

General Category => Community Help => Topic started by: yolao on August 27, 2017, 01:52:51 pm

Title: Boolean object badly imported into nvil....
Post by: yolao on August 27, 2017, 01:52:51 pm

Hi

So, when i import an object that has been cut out with boolean operations into nvil the geometry imports bad with missing polygons and such.

As an example here is a geometry that has been cut out with boolean operation in Blender.
(http://i45.photobucket.com/albums/f86/yolao/Blender_Viewport_ScreenShot.jpg) (http://s45.photobucket.com/user/yolao/media/Blender_Viewport_ScreenShot.jpg.html)

And here is the imported geometry, through OBJ format, into Nvil. Most of the holes are block out.
(http://i45.photobucket.com/albums/f86/yolao/Nvil_Viewport_ScreenShot.jpg) (http://s45.photobucket.com/user/yolao/media/Nvil_Viewport_ScreenShot.jpg.html)

I can check the option of "Triangulate Faces" in blender for export the OBJ and it will then load fine in Nvil, but the end result is far more polygons.
(http://i45.photobucket.com/albums/f86/yolao/Nvil_Viewport_ScreenShot_TriangulateFaces.jpg) (http://s45.photobucket.com/user/yolao/media/Nvil_Viewport_ScreenShot_TriangulateFaces.jpg.html)


The object does export well out of blender without the "Triangulate Faces" option because i don`t have problems in other apps as seen here.
(http://i45.photobucket.com/albums/f86/yolao/Viewport_ScreenShot_A.jpg) (http://s45.photobucket.com/user/yolao/media/Viewport_ScreenShot_A.jpg.html)

Is there any way to load this kind of geometry resulting of a boolean operation into nvil?

Thanks

Title: Re: Boolean object badly imported into nvil....
Post by: steve on August 27, 2017, 09:14:49 pm

Hi yolao,

Blender (+ some other applications) perform an internal optimization for display. In Nvil it does not(it would be a lot of work to implement).
If you really need to import such an object into Nvil, either:-

After import, select all polygons, and use "Optimize". That will resolve the issue you see, but it will also add a lot of extra edges that may not be what/where you want.

You could manually optimize yourself and add cuts/edges.

or, what I would do, is to create such a model in Nvil, which would only take a few minutes, and would have better topology.

Title: Re: Boolean object badly imported into nvil....
Post by: yolao on August 28, 2017, 02:37:00 am

Thanks Steve.

As i said i could also check "Triangulate Faces" in blender and it will export the object fine into nvil but with far more polygons as i show in one of the screen shots. Sometimes i work with booleans for hard surface objects and it that case i definitively prefer blender booleans.

Anyways, i tried the "Optimize" option and it give less amount of polygons than export from blender with "Triangulate Faces" which is good.

Thanks again.
Best Regards