headus 3D tools

[pokopoko_aquila]

hello.

i have question "Discontinuity Faces (Polygon)" .

firstly ,you can watch the picture "snap0005.jpg" ,spotted green color polygon group.
this picture that a part of seat corner. this model made by CAD.
so, exchange" CAD > Nurbs > OBJ " this workflow made Discontinuity Faces .
look at green color polygon ,the number of faces around it isnt equal to number of its edge polygon .
this "Discontinuity Faces" means that they cant share edge　each other.

i want attached their UVs ,when theyre unwraped.
im doing this operation with my eyes now .....
please tell me way to attach them if you know by the situation like this.

sorry ,my poor english.

[headus]

If you haven't already, tick the "Weld UVs" option when you load the OBJ file. That will also weld adjacent geometry vertexes which will help a bit, but like you said, it looks like many of the seams have unmatched vertexes; these ones wont sew up completely.

Unfortunately UVLayout's focus is UV editing ... what you have there is a problem with the geometry, so you'll need to fix that up in a polygon modelling application before loading it into UVLayout.

Phil

[pokopoko_aquila]

hi,Phil

thanks for your reply.
>a problem with the geometry
i think so that. but my workflow "CAD > CG > OBJ" made the geometory like this...

if you know like this question" UV of geometory converted from CAD " ,
tell me question's topic URL with your reply ,please.

i'll search for the solution.
thanks

[headus]

The software you are using that's turning the NURBS into a polymesh isn't sewing up the seams between the patches correctly, so you need to do that yourself before you load the OBJ into UVLayout.

Have a look at blender.org ... its free, and should have the polymesh editing tools you need to fix up the geometry. If you want to quickly see how this data works in UVLayout though, send me the OBJ and I can fix it up here for you.

Phil

[pokopoko_aquila]

hi,Phil.

thank u for your reply quickly!
i think so , i must fix up the object ,too.
i need the solution to do quickly and easyly ,because there are many many objects to fix up.
(Seats , Others and more ...)

>If you want to quickly see how this data works in UVLayout though,
>send me the OBJ and I can fix it up here for you.

thank u for your sagestion. i take up load the OBJ Data with problem of polygon topology.
(this data isnt pixed up.)
(and this data formated RAR with password ,so i will send you e-mail with password)
could you check it ?
tell me your impression of data and my workflow if you have a time.
and fix up the OBJ ,if you can....(but not easy..)

sorry ,my poor english . thank you, your great suport.

[headus]

Thanks for he file ... there's over 300 seams in that geometry, so probably too many to fix up by hand, especially if you have other models to do!

I'd recommend looking at Rhino ... I believe its a very good NURBS modeller, and what you could possibly do is resample the patches so that the U and V knot lines are more even, which will help you get better flattening. Plus there should be some way to fix up the seams between patches too. Maybe with cleaner NURBS patches you'll get much better OBJ exports.

Phil

[pokopoko_aquila]

hi ,Phil and thank u for your suport..

i think so that ,too, other model.

>with cleaner NURBS patches you'll get much better OBJ exports.
yeah ,thats right .and i know Rhino .and Alias or and more but i dont know their app is solution get good result with cleaning and healing .
do you know spGate made in Japan. this app get good job to cleaning and healing.
can their good result get good polygon topology converted ???
i dont know this .. i try so.
(by the way ,have you try do it ?) (T_T)

you would said its difficult that "UV Unwrap tool( include another )" welds each UV point between patches .dont you ?

i try clean and heal CAD nurbus ...
excuse me for my poor english.
thank u for your great suport..