[Plugin] Import OBJ with Materials v2.1 20131118

Khai · 16 Jul 2009, 11:05

yup UV information is a core part of the OBJ Format.. makes it very useful for transfering between programs, such as Maya to trueSpace to Max....

TIG · 16 Jul 2009, 12:43

@khai said:

yup UV information is a core part of the OBJ Format.. makes it very useful for transfering between programs, such as Maya to trueSpace to Max....

Where is it stored in the files ?

Khai · 16 Jul 2009, 12:56

I think it's stored as the VT entries.

ah yes here we go

http://local.wasp.uwa.edu.au/~pbourke/dataformats/obj/ - Full OBJ Format Spec

@unknownuser said:

vt u v w

Vertex statement for both polygonal and free-form geometry.

Specifies a texture vertex and its coordinates. A 1D texture
requires only u texture coordinates, a 2D texture requires both u
and v texture coordinates, and a 3D texture requires all three
coordinates.

u is the value for the horizontal direction of the texture.

v is an optional argument.

v is the value for the vertical direction of the texture. The
default is 0.

w is an optional argument.

w is a value for the depth of the texture. The default is 0.

bagatelo · 16 Jul 2009, 16:06

@chris fullmer said:

I'm confused Bagatelo. What are you asking? This is a plugin that will import .obj into SU. The inverse would be an .obj exporter.

Chris

Yes, I mistake. I have think about EXPORT model with obj file types. But .3ds is very good.

I try to import this model ( http://www.evermotion.org/modelshop/show_product/sculpture-01-am34/1806/0/0/ ) into sketchup and the plugin don't work properly. Export with 3ds Files from MAX result crash in Sketchup.

FBX files maybe can be de very best option.

TIG · 16 Jul 2009, 16:40

@khai said:

I think it's stored as the VT entries.

ah yes here we go

http://local.wasp.uwa.edu.au/~pbourke/dataformats/obj/ - Full OBJ Format Spec

@unknownuser said:

vt u v w

Vertex statement for both polygonal and free-form geometry.

Specifies a texture vertex and its coordinates. A 1D texture
requires only u texture coordinates, a 2D texture requires both u
and v texture coordinates, and a 3D texture requires all three
coordinates.

u is the value for the horizontal direction of the texture.

v is an optional argument.

v is the value for the vertical direction of the texture. The
default is 0.

w is an optional argument.

w is a value for the depth of the texture. The default is 0.

Thanks - I see it now... wait for update...

TIG · 16 Jul 2009, 19:37

@bagatelo said:

@chris fullmer said:

I'm confused Bagatelo. What are you asking? This is a plugin that will import .obj into SU. The inverse would be an .obj exporter.

Chris

Yes, I mistake. I have think about EXPORT model with obj file types. But .3ds is very good.

I try to import this model ( http://www.evermotion.org/modelshop/show_product/sculpture-01-am34/1806/0/0/ ) into sketchup and the plugin don't work properly. Export with 3ds Files from MAX result crash in Sketchup.

FBX files maybe can be de very best option.

Since I'm not going to pay $35 for a model of a small statue I can't see how the actual file is structured - looks like it might be very complex though !!! The current OBJ Importersare quite limited...

avariant · 17 Jul 2009, 18:47

Cool, thanks TIG. I've been using Jim's importer for a long time.

One thing I've encountered with materials. You are assuming that the 'd' tag comes after the Kd tag, but it doesn't necessarily. It can show up anywhere in the list. The obj format doesn't require a specific order. So, if 'd' comes first, the plugin is crashing.

TIG · 17 Jul 2009, 18:57

Thanks for the info... I'm looking at uv mapping to so a fix might be soon...
I also need to trap mtl's with a texture but no colour [using texture.average_color if no Kd ?]... I am looking at various fixes and other improvements... Please check out the Ruby Forum over the coming days...

Khai · 23 Jul 2009, 17:27

ok for some reason I'm not getting anything at all.
it's asking for the measurements, I see it reading lines at the bottom, it asks me if I want to flip Axis...then nothing appears on screen.

edit : testing an idea. I think it's do to with the choice of measurements. hold on...

Khai · 23 Jul 2009, 17:41

yup it's metres and kilometres.... looks like it's coming in so tiny you can't see it. (Inches, Feet, yards, Miles, Millimetres, Centimetres are working ok)

Khai · 23 Jul 2009, 17:44

and I'm happy to report the UVmapping is now spot on

EarthMover · 23 Jul 2009, 17:56

Tested also and it's working Great!!! Thanks TIG. I tried to import a few Lounge Chairs that I had for Vue in .obj format that crashed SU with the previous importer and the new version handled them flawlessly.

TIG · 24 Jul 2009, 00:33

I have at last got working - texture mapping, units dialog, YZ-flip, crash avoidance etc etc...

Here's v1.2 http://forums.sketchucation.com/viewtopic.php?p=172790#p172790

Note that the file has been renamed and you need to delete any earlier ones...

It's still not perfect, takes ages with large files and large/complex/smoothed objs come out slow/messy/in_need_of_fixing...

Feedback please.

Khai · 24 Jul 2009, 19:07

ok I'm getting strange results here. some OBJ's just won't import for some reason. Trying to figure it out atm.. the affected OBJ's will load into other app's ok tho, so I'm not sure what the issue could be.

Update.

the affected OBJ's import with Jim's Ruby ok (apart from flipped Axis and no UVmapping), so it looks like a bug somewhere..

want me to send you a copy of one of the affected OBJ's to test with?

TIG · 24 Jul 2009, 21:05

@khai said:

ok I'm getting strange results here. some OBJ's just won't import for some reason. Trying to figure it out atm.. the affected OBJ's will load into other app's ok tho, so I'm not sure what the issue could be.

Update.

the affected OBJ's import with Jim's Ruby ok (apart from flipped Axis and no UVmapping), so it looks like a bug somewhere..

want me to send you a copy of one of the affected OBJ's to test with?

Please send... Waht errors do you get in the console etc ?

Jim's code for the faces is effectively the same in both versions ???

Khai · 24 Jul 2009, 21:23

thats the problem.. I'm not getting any errors (unless I'm doing something wrong the console window is remaining blank).... I'm just not getting the object...

the steps I'm getting :

select Ruby
Select OBJ
asked what unit's. (choose at random here)
Status bar shows the lines being read

here on a file that works I see the OBJ loaded. on a file thats not working, the view jumps, nothing is shown.

asked if I want to flip axis. (y/n)

no change in scene from start. - this also happens if I choose Metres or kilometers with an OBJ that does work ok. (obj will load as Feet...) the affected OBJ's will load with Jim's original script tho shrug

ok.. where do you want me to send the files to? I can't seem to attach them here...

TIG · 25 Jul 2009, 10:30

@khai said:

thats the problem.. I'm not getting any errors (unless I'm doing something wrong the console window is remaining blank).... I'm just not getting the object...

the steps I'm getting :

select Ruby
Select OBJ
asked what unit's. (choose at random here)
Status bar shows the lines being read

here on a file that works I see the OBJ loaded. on a file thats not working, the view jumps, nothing is shown.

asked if I want to flip axis. (y/n)

no change in scene from start. - this also happens if I choose Metres or kilometers with an OBJ that does work ok. (obj will load as Feet...) the affected OBJ's will load with Jim's original script tho shrug

ok.. where do you want me to send the files to? I can't seem to attach them here...

Zip the file and attach it to a PM...

Kgon · 27 Jul 2009, 20:55

Hello everyon!!

Well,i'm trying this plugin and it seems awesome , but im having a problem with it, after the import nothing shows up..i mean sketchup makes the entire process ( count of the lines) and once SU finish ...nothing is displayed in the screen...it says " x number of lines processed" but the su file is clean as when you open a new file..so...m i doing something wrong? i'm trying importing a XFrog tree ,sometimes su ask me for to flip yz ,sometimes don't but no matter what option i select yes or not nothing works..., any clue ??

By the way my xfrog trees are in max ,i open them in max then i export them like an .Obj file format ..Could it be a max exporting issue that don't let the object importer works well with the xported Object??

Chris Fullmer · 27 Jul 2009, 22:16

In the other importers, once you import a model, you have to then click somewhere in the model to place the imported piece. Try that and see if it helps.

Chris

Khai · 27 Jul 2009, 22:27

tried that Chris, no go.

with some OBJ's they are just not importing for some reason.. I've sent an example to TIG and I hope he can figure out why...