bad export??

Hi Michael,

Just tested the new beta but when I try to export to OBJ I get holes in my mesh.
See image and I have attached the Moi file.




Is this because an error or a bad modeled object. :-)

Peace,
Rich_Art. ;-)

Hi Rich,

I just tried this in V2 and get the same result, it's just a graphical thing the surface is there when you export it and open it up in a poly or rendering program.

If you want to see the face put a value of 8 in 'Divide larger than' in the mesh settings also I noticed you've got such a low 'Angle' input at 4.61 where visual I get the same mesh with a value of 8 just curious why 4.61?

Cheers

I opened and export using default setting:i see holes (i think they are the same you have found there..maybe..)
i also opened in MOI V-2:same results (see attachments,central image before export)
..??..
I confirm what Danny says:value=8 is ok !

------> If you want to see the face put a value of 8 in 'Divide larger than' in the mesh settings also I noticed you've got such a low 'Angle' input at 4.61 where visual I get the same mesh with a value of 8 just curious why 4.61? <------

No particular reason.. It was just a click on the slider :-)

The "Divide larger than" did the job indeed.. How did you found this number? If you use 7 or 9 the gap is back..

Peace,
Rich_Art. ;-)

8 = 2 power 3 ;)
It's alway cool to take some power of 2 for some calculations in 3D progs ;)

LoL I always was sick during mathematic lessons so I do not understand why 8 works but 7 or 9 not.. LoL Or 6, six is also the power of 2. :-)

Perhaps it is best not try to understand this mathematic stuff...


Peace,
Rich_Art. ;-)

No Sorry : 6 is not a power of 2! ;)
2
2*2 = 4 (2 power 2)
2*2*2 = 8 (2 power 3)
2*2*2*2 = 16 (2 power 4)
etc

Rich_Art<<Perhaps it is best not try to understand this mathematic stuff...>>

...totally agree...

-----> No Sorry : 6 is not a power of 2!

haha, you see, I did not lie when I told I was sick at the mathematical lessons.
I will try to stick with modeling. People like you are much better in mathematical than I am.


Peace,
Rich_Art. ;-)

Absolutly no need to know maths for make fabulous images or modeling! :)

Hahaha I'll do my best to make nice images. Although I do not have that much free time as I had a couple of years ago. Bummer....


Peace,
Rich_Art. ;-)

Hi Rich_Art, thanks for posting the model with the export problem.

Like Danny mentioned above, it seems to be a display glitch, if you go through with the export the actual polygon data seems to be generated ok.

Also since it has the same behavior in the previous v3 beta and in v2 at least it's not any new bug introduced with this new release.

I'll investigate it though and try to figure out what's going wrong.

- Michael

Was this file made with MoI? There is something about that surface. Maybe because it was shrunken (and the join tolerances)? If I delete that little surface, then select naked edges and Join, then run planar, Joining everything up again, they remain visible in the polygon export.

After the planar, Joining the new surface to the inner sunken surface, is normal and quick. Joining to the outer surface, is very prolonged. Something about that calc there.

Anyway, replacing those does something. We'll see what Michael comes up with.

Hi Burr, those surface are one with a "pole" where one spot is compressed down to a point, that's a fairly different structure than the trimmed planes that Planar will build.

Extrude with the "To point" option will make results with a pole like that currently, maybe I should make it create trimmed planes instead when it's making a planar side like that.

- Michael

>>>Was this file made with MoI?<<<

Yes it was.. :-)

@Michael,
Thanks for the explanation.

Peace,
Rich_Art. ;-)

Hi Rich_Art, so it appears to be a bug somewhere in the triangulator.

If you export with "Output N-gons" the actual n-gon will get written despite the display being wrong. But if you export as "Output: Quads & Triangles" or "Output: Triangles only", then those areas will be missing in the output as well.

If you need to export triangles instead of n-gons, you can use the attached model version - here I've edited those areas to be made up of trimmed planes as Burr mentions above and those happen to avoid the triangulation bug.

I will continue to investigate the triangulation bug, it's been quite a while since I've seen one of those.

But the attached model should get you around this issue for now anyway.

- Michael

By Taron with Sculptris ;)

Hi Michael,

> Hi Rich_Art, so it appears to be a bug
> somewhere in the triangulator.

I've had a couple of these in the past and accepted it as a graphic glitch as it wrote out the surface okay and I moved on, did you want me to report these in the future?

@ Pilou, that's one ugly looking creature, kind of cool though :)

-

Thanks Michael.
As said, it is no big deal. I'm just doodling with Moi....

Peace,
Rich_Art. :-)

Hi Danny,

> I've had a couple of these in the past and accepted it as a graphic glitch as it wrote out the
> surface okay and I moved on, did you want me to report these in the future?

Yeah, it would be good to get these cases so I could look into them. If it's a cosmetic glitch it might go on the back burner for a while but it would be good to have the buggy case all the same. You can just send them to me at moi@moi3d.com .

Thanks, - Michael