[osg-users] Loading textured meshes (obj+mtl) leads to crash in osg 3.4.1

[Voerman, L.]

Hi Tom,
I think your obj file is invalid, as the faces all reference normal "0" and
1> no normals are provided
2> normal indices start at 1 (according to wikipedia
<https://en.wikipedia.org/wiki/Wavefront_.obj_file#Face_elements>)

if I reduce your obj file to just the first face (removing material and all
but vertex/texcoord 0-1-2) ( attached )
I get the same crash with
osgconv DataFace1.obj
removing the /0 (normal ref) three times fixes the problem - same works for
the large file (with textures working)
Laurens.

On Mon, Jan 13, 2020 at 3:15 PM 'Tom Pollok' via OpenSceneGraph Users <
osg-users at googlegroups.com> wrote:

> Hello Robert,
>
> I added a minimal reproducer and a stracktrace (release). Unfortunately i
> only have release builds on this machine, but I could provide debug stack
> trace from another system later...
>
> Best,
> Tom
>
>
>
> Am Montag, 13. Januar 2020 12:12:48 UTC+1 schrieb Tom Pollok:
>>
>> I added a zip file with the mesh. It happens when loading that obj file.
>>
>> https://owncloud.iosb.fraunhofer.de/owncloud/s/dc8dkbXrQz3gTuh
>>
>> Pw: osg
>>
>> I have to check for the stack trace again.
>>
>> osgDB::Options* opt = new osgDB::Options;opt->setOptionString("noRotation");osg::ref_ptr<osg::Node> node = osgDB::readNodeFile(pathToObjFile, opt);
>>
>> Im using two windows machines with intel processors (64bit).
>> OSG was built by ourselves.
>> One has an integrated intel graphics unit and one with a Nvidia 2080Ti.
>>
>>
>> Am Freitag, 10. Januar 2020 19:45:26 UTC+1 schrieb Robert Osfield:
>>>
>>> On Friday, 10 January 2020 18:01:57 UTC, Tom Pollok wrote:
>>>>
>>>> When loading a textured mesh from an obj file with mtl + texture file,
>>>> openscenegraph crashes.
>>>>
>>>> I use openscenegraph 3.4.1. Does anybody know if that issue has been
>>>> fixed in newer versions?
>>>>
>>>
>>> I don;t recall reports of crashes associated with .obj.
>>>
>>> Could you provide a link to the model that is causing the problem?
>>>
>>> Could you provide a stack trace?
>>>
>>> What platform are you working on?  Did you build the OSG yourself?
>>>
>>> What hardware are you working on?
>>>
>>> Cheers,
>>> Robert,
>>>
>>
>>
>> Am Freitag, 10. Januar 2020 19:45:26 UTC+1 schrieb Robert Osfield:
>>>
>>> On Friday, 10 January 2020 18:01:57 UTC, Tom Pollok wrote:
>>>>
>>>> When loading a textured mesh from an obj file with mtl + texture file,
>>>> openscenegraph crashes.
>>>>
>>>> I use openscenegraph 3.4.1. Does anybody know if that issue has been
>>>> fixed in newer versions?
>>>>
>>>
>>> I don;t recall reports of crashes associated with .obj.
>>>
>>> Could you provide a link to the model that is causing the problem?
>>>
>>> Could you provide a stack trace?
>>>
>>> What platform are you working on?  Did you build the OSG yourself?
>>>
>>> What hardware are you working on?
>>>
>>> Cheers,
>>> Robert,
>>>
>> --
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