Re: [osg-users] Can see parts of the back side of a model
Hi Bruce, backface culling does not work with surface normals, the front and back faces are separated by the vertex winding. your model might have the faces in the wrong direction - or QT might have left openGL in an unexpected state. maybe this could help: osg::ref_ptr cf = new osg::CullFace; cf->setMode(osg::CullFace::FRONT); ss->setAttributeAndModes(cf.get(), osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON); or possibly this: ff = new osg::FrontFace; ff->setMode( inverted() ? osg::FrontFace::CLOCKWISE : osg::FrontFace::COUNTER_CLOCKWISE); ss->setAttribute(ff); Regards, Laurens. On Thu, Aug 24, 2017 at 2:09 AM, Bruce Clay wrote: > Hi, > > I am using OSG 3.4 with QT 5.8 and Visual Studio 2015. I am also using > the QT osgWidget class I found on line. When I load a model I can see > parts of the inside or back side of the model. One viewer noted that it > looked like the surface normals are inverted. I could not find anything in > the osgWidget class or anything in the qtOsgWidget class that has anyeffect > on surface normals. > > Any suggestion would be greatly appreciated > > Thank you! > > Cheers, > Bruce > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=71514#71514 > > > > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Can see parts of the back side of a model
HI Bruce, On 24 August 2017 at 01:09, Bruce Clay wrote: > I am using OSG 3.4 with QT 5.8 and Visual Studio 2015. I am also using > the QT osgWidget class I found on line. When I load a model I can see > parts of the inside or back side of the model. One viewer noted that it > looked like the surface normals are inverted. I could not find anything in > the osgWidget class or anything in the qtOsgWidget class that has anyeffect > on surface normals. > > When references a 3rd party code that is online somewhere it would be worth providing a link to it. FYI, osgWidget is a NodeKit in OSG-3.4 so references a class of the same name is a bit confusing. I presume you aren't talking about the osgWidget NodeKit as it has nothing to do with Qt. As the issue, is this a new issue? Could it be lack of depth testing? Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Mesh Outline
Hi, Problem solved by using PolygonOffset On 22 August 2017 at 18:08, Nabil KHALIFA wrote: > Hi, > I use OSG to draw the silhouette outline of a mesh. > The result is fine. But when i superpose the silhouette and the mesh, the > inner border of the box are hidden (the lines in red). > Is there any way to draw them over? > Thx > -- Nabil Khalifa ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Custom data within nodes or drawables
Dear OSG forum, I am currently implementing picking and selection inside my app. I have setup everything up to the point where I can know the osgUtil::Intersection and with it the Drawable that was picked. Now, what I am really interested in is not the Drawable or Node itself but the object it represents in my DataBase. Hence I would like to associate my OSG rendered objects with my DataBase objects. To that intent, is there something like a custom data in the Drawables in which I could store a pointer to my DataBase objects? Or should I handle this association and lookup myself? Thank you! Antoine -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71520#71520 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom data within nodes or drawables
HI Antoine, The osg::Object base class a coarse grained Object::setUserData(Referenced*) feature, or a fine grained template based Object::setUserValue(strd::string& name, T value); method. The later functionality is managed via UserData using a UserDataContainer class that agregates use the UserValue's in the form of template UserObjects. Drawable subclasses from Object so you can get all the functionality you want for there. Robert. On 24 August 2017 at 10:52, Antoine Rennuit wrote: > Dear OSG forum, > > I am currently implementing picking and selection inside my app. I have > setup everything up to the point where I can know the osgUtil::Intersection > and with it the Drawable that was picked. > > Now, what I am really interested in is not the Drawable or Node itself but > the object it represents in my DataBase. Hence I would like to associate my > OSG rendered objects with my DataBase objects. To that intent, is there > something like a custom data in the Drawables in which I could store a > pointer to my DataBase objects? Or should I handle this association and > lookup myself? > > Thank you! > > Antoine > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=71520#71520 > > > > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom data within nodes or drawables
That's awesome! Thanks a lot Robert, Antoine. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71522#71522 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Can see parts of the back side of a model
Hi, The original source code related to this problem was downloaded from https://github.com/Submanifold/QtOSG. The QtOSG class is similar in function to the osgQt distributed with OSG in function but it seems more "native" to OSG itself. That is I could see all of the normal OSG code. When I use the osgQt class I can display the model properly but I don't appear to get the same window capabilities. The good and bad images were attached as requested Thank you! Cheers, Bruce -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71523#71523 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Can see parts of the back side of a model
Hi Bruce, A quick look at the OSGWidget.cpp and it looks to me like the code is creating its own osg::Camera and assigning it to the view but this Camera never sets up global default state so OpenGL defaults will be used, depth testing is off by default in OpenGL, which in turn will give this problem. This is a bug in OSGWidget.cpp that needs fixing and passing on to the authors of the code. What the code should do is either: 1) Use the View's master Camera rather than replacing it with a locally created one, View's master Camera has a StateSet with the appropriate global defaults applied. i.e. osg::Camera* camera = view->getCamera() // replacing camera = new osg::Camera 2) Assign a StateSet to the Camera, and set it's up with the appropriate global defaults for the 3D scene i.e. camera->getOrCreateStateSet()->setGlobalDefaults(); // add around line 127 Robert. On 24 August 2017 at 15:43, Bruce Clay wrote: > Hi, > > The original source code related to this problem was downloaded from > https://github.com/Submanifold/QtOSG. > > The QtOSG class is similar in function to the osgQt distributed with OSG > in function but it seems more "native" to OSG itself. That is I could see > all of the normal OSG code. When I use the osgQt class I can display the > model properly but I don't appear to get the same window capabilities. > > The good and bad images were attached as requested > > Thank you! > > Cheers, > Bruce > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=71523#71523 > > > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OpenSceneGraph-3.4.1-rc3 tagged
Hi All, I have just tagged the 3.4.1 release candidate 3: https://github.com/openscenegraph/OpenSceneGraph/tree/OpenSceneGraph-3.4.1-rc3 I have only made a couple of minor changes since rc2, so it feels like we are converging nicely to a stable release. If feedback is positive I'll tag 3.4.1 tomorrow! I would greatly appreciate testing of 3.4.1-rc3 across as many platform/build combinations as you can. Thanks in advance, Robert. -- Changes since rc2, details below: $ git log commit c1055fdfbceb297a4f2108811c0ec1148da30826 Author: Robert Osfield Date: Thu Aug 24 17:49:34 2017 +0100 Updated rc number to 3 or 3.4.1-rc3 commit 328632af7511e02ad128e57399479f7bc2b1eec0 Author: Robert Osfield Date: Thu Aug 24 17:45:48 2017 +0100 Updated READE and ChangeLog commit ec89d96114045dbc3a2df479fd9457b6b038ccaa Author: Robert Osfield Date: Wed Aug 23 15:26:07 2017 +0100 Fixed underflow issue commit ea17943a7497cf774d22e937453c61189855a61d Author: Robert Osfield Date: Tue Aug 22 14:17:45 2017 +0100 Bimped SO version due to changes in Windows exports in osgDB::ifstream + ofstream. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
