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

['Tom Pollok' via OpenSceneGraph Users]

Hi Laurens,

thank you for clarification! My problem was that im using openscenegraph in 
combination with osgEarth. I figured out how to fix it, so in case other 
osg and osgEarth users might run into the same issue.

To fix the issue i had to include

#include <osgEarth/Registry>

and after loading the model i had to run the shader generator on the model.

osgEarth::Registry::shaderGenerator().run( model );

Now everything works fine.

Thank you very much for your super quick help @Laurens and @Robert !!!

Best,
Tom

Am Mittwoch, 15. Januar 2020 13:00:41 UTC+1 schrieb Voerman, L.:
>
> Hi Tom,
> Your model works with texture for me, in osg 3.4.0 as well as 3.6.5 with 
> the following commands:
> sed -E "s#(f [0-9]+/[0-9]+)/0 ([0-9]+/[0-9]+)/0 ([0-9]+/[0-9]+)/0#\1 \2 
> \3#" "Data2.obj" > noNormals.obj
> osgviewer -O noRotation  noNormals.obj 
> Laurens.
>
>
> On Wed, Jan 15, 2020 at 12:24 PM 'Tom Pollok' via OpenSceneGraph Users <
> osg-... at googlegroups.com <javascript:>> wrote:
>
>> Hello Robert,
>>
>> to test it with my old osg version, i fixed the obj file such it does not 
>> contain any indices to normals anymore, as there are no normals.
>> This indeed helped loading the model, but no textures appear at all. 
>> Should it load the textures automatically due to the first line in the obj 
>> file being mtllib Data.mtl and the use of usemtl material_0 before the 
>> faces or do i need to take extra care when loading a textured model?
>>
>> For loading, im using only:
>>
>> osgDB::Options* opt = new osgDB::Options;opt->setOptionString("noRotation");osg::ref_ptr<osg::Node> node = osgDB::readNodeFile(pathToObjFile, opt);
>>
>>
>> Best,
>> Tom
>>
>>
>> Am Dienstag, 14. Januar 2020 17:25:27 UTC+1 schrieb Robert Osfield:
>>>
>>> On Tue, 14 Jan 2020 at 15:26, 'Tom Pollok' via OpenSceneGraph Users <
>>> osg-... at googlegroups.com> wrote:
>>>
>>>> Thank you for the workaround.
>>>>
>>>> So as far as i understand you only add the texture coordinate and 
>>>> normal, if there exists one with a index greater than 0 and less then the 
>>>> number of normals or texture coordinates.
>>>> So that means that openscenegraph now will be able to display the 
>>>> textured mesh, even if the normals are missing, right?
>>>>
>>>
>>> Yes, that's correct, you'll get a textured mesh with no normals assigned.
>>>
>>> Robert.
>>>  
>>>
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