Hi Pilou, thanks for gathering more information.

So I don't believe that his original request to have the fully cleaned ngon support is really possible, since it is not possible to have a polygon with a hole in it in an OBJ file. Even Cinema4D is not able to generate the type of file that he wants!

But as others have requested, it is possible to do a quad export where possible, that's what I will focus on.


> <Within the archive there is the Adware software (called "55c5y1mk.exe"), and I do> not like these better then my firewall. The exe (see above) had been put there by ??,
> and I would not advice to install Adware soft, even it is made by ??. :)>
> and this one <Adware/CommAd alert message>

Wow, this is the first I've heard of this. I definitely have not put any kind of adware into MoI!!!

I just ran spybot search & destroy and AdAware on my system, and I could not detect this problem.

Do you know what adware checker they are using? It is not uncommon for there to be "false positive" reports, especially with some checkers.

They should probably run a virus checker as well, it is possible they have a virus that is infecting their files. The official release of the last beta should have this exact size:
4,536,544 moi_Sep-26-2006_setup.exe
If it is different than that, their file has become infected after it was downloaded.


MoI has been downloaded 15,367 times so far - I'm confident that if the original was infected I would have heard something about it before now.

I did a google search for "55c5y1mk.exe" and got nothing...

- Michael

- @ HoMe : No, Cinema 4D doesn't seem to be able to import 3DM (or IGES) files. If you're able to do that, please explain how.

- @ Michael : Dragging the (imaginary) sliders in both the UI options dialog box or the export mesh dialog box doesn't make any change (and it also doesn't work with multiple clicks in the area)

Also, on my other computer I noticed that OBJ export is some kind of "all or nothing". If the slider is put to the left, I've a low poly version. Then if I drag to the right I've a high poly version but no gradation between the two. The file size and the number of polygons is the same when I export an object with the slider at the middle of the bar or if the slider is at the extreme right.
As you mentioned that export is still a "work in progress" it's difficult to know if it's normal (for now on) or if it's something to report ?

< I'm confident that if the original was infected I would have heard something about it before now
You right ! Seems these guys have yet something wrong on their computers :)

> Also, on my other computer I noticed that OBJ export is some kind of
> "all or nothing". If the slider is put to the left, I've a low poly version.
> Then if I drag to the right I've a high poly version but no gradation
> between the two. The file size and the number of polygons is the same
> when I export an object with the slider at the middle of the bar or if the
> slider is at the extreme right.

Yeah, the problem here is the way that meshing works - the basic approach is that a smooth surface is continually subdivided into two pieces (repetitively) until each piece matches some kind of tolerance.

So things come in kind of "chunks" - once a surface is split, the new smaller pieces will often times be within a much tighter tolerance so they won't subdivide again until the tolerance is reduced by quite a bit more.

Eventually I should be able to improve this by doing some initial forced subdivision of the surface into more than just 2 pieces at a step, but this may take a while.

- Michael

>@Schbeurd
>Seems very curious all works fine for me for the mini "few" or the "max" numbers of polygones !
>As show some pos above http://moi3d.com/forum/index.php?webtag=MOI&msg=141.10

I think that what he's talking about is that if you move the slider by a small amount, you don't really get a very gradual change in the number of polygons. It will work more like you move the slider by a little bit and nothing changes, and then you move a little more and suddenly things double in some spots...

But there should still be a lot of difference between large different positions of the slider most of the time, as you show.

- Michael

I just have to jump in here and say that nendo exports ngons to obj just fine.

#
# Exported from Nendo v1.1
#
mtllib ngon.mtl
g dodecahedron0
usemtl dodecahedron0_material
# vertex list
v 17.265 0 6.18
v 10 10 10
v 0 6.18 17.265
v 0 -6.18 17.265
v 10 -10 10
v -10 -10 10
v -6.18 -17.265 0
v 6.18 -17.265 0
v 10 -10 -10
v 17.265 0 -6.18
v 10 10 -10
v 6.18 17.265 0
v -6.18 17.265 0
v -10 10 10
v -17.265 0 6.18
v -17.265 0 -6.18
v -10 -10 -10
v 0 -6.18 -17.265
v 0 6.18 -17.265
v -10 10 -10
# vertex normals
vn 0.572321 -0.601118 0.557769
vn -0.0503684 -0.361915 0.930849
vn -0.0503684 0.361915 0.930849
vn 0.572321 0.601118 0.557769
vn 0.957119 2.34636e-008 0.289695
vn 0.289695 0.957119 0
vn 0.557769 0.572321 -0.601118
vn 0.930849 -0.0503684 -0.361915
vn 0.930849 -0.0503684 0.361915
vn 0.557769 0.572321 0.601118
vn 0.930849 0.0503684 -0.361915
vn 0.557769 -0.572321 -0.601118
vn 0.289695 -0.957119 0
vn 0.557769 -0.572321 0.601118
vn 0.930849 0.0503684 0.361915
vn 0.361915 -0.930849 -0.0503684
vn -0.361915 -0.930849 -0.0503684
vn -0.601118 -0.557769 0.572321
vn -2.34636e-008 -0.289695 0.957119
vn 0.601118 -0.557769 0.572321
vn -0.572321 -0.601118 0.557769
vn -0.957119 -2.34636e-008 0.289695
vn -0.572321 0.601118 0.557769
vn 0.0503684 0.361915 0.930849
vn 0.0503684 -0.361915 0.930849
vn -0.601118 0.557769 0.572321
vn -0.361915 0.930849 -0.0503684
vn 0.361915 0.930849 -0.0503684
vn 0.601117 0.557769 0.572321
vn -2.93295e-008 0.289695 0.957119
vn -0.361915 0.930849 0.0503684
vn -0.601118 0.557769 -0.572321
vn -2.34636e-008 0.289695 -0.957119
vn 0.601118 0.557769 -0.572321
vn 0.361915 0.930849 0.0503684
vn -0.557769 0.572321 0.601118
vn -0.930849 -0.0503684 0.361915
vn -0.930849 -0.0503684 -0.361915
vn -0.557769 0.572321 -0.601117
vn -0.289695 0.957119 0
vn -0.557769 -0.572321 0.601117
vn -0.289695 -0.957119 0
vn -0.557769 -0.572321 -0.601118
vn -0.930849 0.0503684 -0.361915
vn -0.930849 0.0503684 0.361915
vn -0.601118 -0.557769 -0.572321
vn -0.361915 -0.930849 0.0503684
vn 0.361915 -0.930849 0.0503684
vn 0.601118 -0.557769 -0.572321
vn -2.93295e-008 -0.289695 -0.957119
vn -0.0503684 0.361915 -0.930849
vn -0.0503684 -0.361915 -0.930849
vn 0.572321 -0.601118 -0.557769
vn 0.957119 2.93295e-008 -0.289695
vn 0.572321 0.601118 -0.557769
vn -0.957119 -2.93295e-008 -0.289695
vn -0.572321 -0.601118 -0.557769
vn 0.0503684 -0.361915 -0.930849
vn 0.0503684 0.361915 -0.930849
vn -0.572321 0.601118 -0.557769
f 1//5 2//4 3//3 4//2 5//1
f 2//10 1//9 10//8 11//7 12//6
f 1//15 5//14 8//13 9//12 10//11
f 5//20 4//19 6//18 7//17 8//16
f 4//25 3//24 14//23 15//22 6//21
f 3//30 2//29 12//28 13//27 14//26
f 12//35 11//34 19//33 20//32 13//31
f 13//40 20//39 16//38 15//37 14//36
f 15//45 16//44 17//43 7//42 6//41
f 18//50 9//49 8//48 7//47 17//46
f 11//55 10//54 9//53 18//52 19//51
f 20//60 19//59 18//58 17//57 16//56


copy that to a txt file,rename it to obj and look at it.Its a dodecahedron. Cheers

> I just have to jump in here and say that nendo exports ngons to obj just fine.

The original request in this thread is not just about ngons, it's about ngons with interior holes.

The "with interior holes" is the key thing there that I don't believe is possible with .obj format.

- Michael

I have also hab some problems with the obj exporter. I agree that the only way to get a decent usable .obj is if its quadrangulated. but only as a post process before the obj is written. I for one prefer to do the quadrangilation myself as xsi does the best automated quadrangulation i've seen.
So an option in the export process to keep as is or quadrangulate will be great. ...after all your object gets triangulated at rendertime anyway.

An obj file will suppport ngons with holes in it as long as thee are two edges or a quad holding the hole

one thing i've noticed is that fillets with very small radii are not converted acurately. maybe something to do with tolerance being too high for the tesselation process?

The slider bug is fixed for the next beta. I'll probably try to release the next beta pretty soon (maybe a few days) with mostly bug fixes in it.

- Michael

> one thing i've noticed is that fillets with very small radii are not converted acurately.
> maybe something to do with tolerance being too high for the tesselation process?

HI skello, can you please post an example .3dm model that has this problem? It would help me to investigate it.

- Michael