Blender ignores smoothing group when exporting. Why?

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dugla
Posts: 2
Joined: Tue Nov 20, 2012 4:00 pm

Blender ignores smoothing group when exporting. Why?

Postby dugla » Tue Nov 20, 2012 4:07 pm

Hello,

I have a trivial scene. One triangle. The triangle was imported from a Wavefront .obj file. This file contains a single smoothing group.

Here is the file:

# triangle

# xyz
v 0.0 0.0 0.0
v 1.0 0.0 0.0
v 0.0 1.0 0.0

# st
vt 0.0 0.0 0.0
vt 1.0 0.0 0.0
vt 0.0 1.0 0.0

# n
vn 0.0 0.0 1.0
vn 0.0 0.0 1.0
vn 0.0 0.0 1.0

# smoothing group
s 1

# face xyz/st/n
f 1/1/1 2/2/2 3/3/3



I want to export the scene as a .3ds file. When I do the resultant file does not have a smoothing group. Sigh.

How to I tell Blender to preserve the smoothing group and send it to the exported file?

Thanks,
Doug

stiv
Posts: 3646
Joined: Tue Aug 05, 2003 7:58 am
Location: 45N 86W

Postby stiv » Tue Nov 20, 2012 6:18 pm

Does the OBJ importer support smoothing groups?
(does your model look different with smoothing compared to without?)

Does the 3DS exporter support smoothing groups?

Sorry I don't know the answers to these questions.

The big problem with translating from one format to another is not basic concepts like vertex coordinates, but metaphors like smoothing groups, or materials/textures.

dugla
Posts: 2
Joined: Tue Nov 20, 2012 4:00 pm

Postby dugla » Tue Nov 20, 2012 10:36 pm

stiv wrote:Does the OBJ importer support smoothing groups?
(does your model look different with smoothing compared to without?)

Does the 3DS exporter support smoothing groups?

Sorry I don't know the answers to these questions.

The big problem with translating from one format to another is not basic concepts like vertex coordinates, but metaphors like smoothing groups, or materials/textures.


@stiv.

Um, not sure why you posted a non answer. I really need to get this sorted ASAP.

stiv
Posts: 3646
Joined: Tue Aug 05, 2003 7:58 am
Location: 45N 86W

Postby stiv » Wed Nov 21, 2012 2:04 am

The answers to those two questions are at the crux of your problem. If your export does not do it, your exporter does not do it. Same with the importer.

You might try asking at the user forums at blenderartists.org .

CoDEmanX
Posts: 894
Joined: Sun Apr 05, 2009 7:42 pm
Location: Germany

Postby CoDEmanX » Wed Nov 21, 2012 2:02 pm

OBJ importer supports smooth groups, but 3ds exporter doesn't

http://en.wikipedia.org/wiki/.3ds
0x4150 // Smoothing Group List
--> is not in the py script
I'm sitting, waiting, wishing, building Blender in superstition...


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