Dear Ulrich and Erik, Yeah, I can load the model with texture now. Thanks Ulrich for your help. I really appreciate that. For Erik's question, I must say that I did try the VRML loader, but it didn't compile. I had another thread to ask for the issue (you can search in osg mails for "VRML plug in"), and there were some answers. Some said I may use Linux instead, and some said I should be able to compile in in Windows. Anyway, I wasn't able to compile the plug-in, so converting to obj model is the next thing I try. It works for me now, so I think I'm good. Thanks, Dat
On Tue, Oct 27, 2009 at 6:27 AM, Erik den Dekker <[email protected]> wrote: > > Hi Dat, > > Maybe I am not seeing something obvious here, but why don't you use the > OpenSceneGraph VRML loader instead of taking a detour via 3DS Max and > convert to .obj format? > > Erik den Dekker > > On 26-10-2009, at 16:10, Nguyen Tien Dat wrote: > >> Dear Ulrich, >> Sorry for my stupidity, but I don't know anything about modifying >> models. The model is actually created in VRML, and I use 3DS Max to >> export it to obj format. So if you can, please tell me a bit more >> about how to optimize the model: >> - How can you remove duplicate materials (if you can tell me how to do >> it by hand, that helps too) >> - What else can I do to load the model in an efficient way? >> Thank you very much, >> Dat >> >> On Mon, Oct 26, 2009 at 7:33 AM, Ulrich Hertlein <[email protected]> >> wrote: >>> >>> Hi Dat, >>> >>> On 23/10/09 5:26 PM, tien dat wrote: >>>> >>>> Dear Ulrich, >>>> Could you tell me more about how to specify that option? Can I specify >>>> it while using osgviewer.exe or I have to rebuild osgviewer.exe with >>>> the option? >>> >>> Unfortunately you can't (at the moment) set this option externally or >>> internally, because the .obj loader doesn't pass the options object >>> along. >>> >>> Even if you could it would only avoid loading the same image over and >>> over >>> again. It will not solve the massively duplicated state/material that >>> the >>> model has. >>> >>> Either the modelling is done very inefficiently in the 3D application or >>> whatever exporter is used messes things up. >>> >>> If you absolutely have to use osgviewer (rather than your own app) I'd >>> actually write a script to optimise the .obj and .mtl files by removing >>> duplicate materials. >>> >>> What you might also want to do is to remove the 'map_Ka' (ambient texture >>> map) statements since they are not used with the standard OpenGL paths >>> (but >>> are still loaded). >>> >>> Cheers, >>> /ulrich >>> >>>> On Fri, Oct 23, 2009 at 5:02 AM, Ulrich Hertlein<[email protected]> >>>> wrote: >>>>> >>>>> On 23/10/09 10:58 AM, Ulrich Hertlein wrote: >>>>>> >>>>>> On 22/10/09 9:40 PM, tien dat wrote: >>>>>>> >>>>>>> I have a model in obj format and want to load the model into >>>>>>> OpenSceneGraph. When there is no texture, OpenSceneGraph can load the >>>>>>> model fine. But when I use the model with texture, OpenSceneGraph >>>>>>> allocates a huge amount of memory and crashes. I think it's a runtime >>>>>>> bug and would like to know how to fix it. Please find some pictures >>>>>> >>>>>> Not really a bug, I'd say you're running out of memory. >>>>>> >>>>>> - try to reduce the image sizes. >>>>>> - a lot of materials reference the same image. I don't think the obj >>>>>> loader caches this which means you're loading that image over and over >>>>>> again. Use osgDB::Options to specify caching of images. >>>>> >>>>> Oh, and you seem to have pretty much one material per drawable. This >>>>> will >>>>> absolutely kill your performance. Have a look at the .mtl file, you'll >>>>> notice that there are heaps of materials that have identical >>>>> properties. >>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Dat Tien Nguyen PhD student, Computer Science Department The University of Iowa, IA 52242 http://cs.uiowa.edu/~tinguyen _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
