Re: [osg-users] Rendering an OpenSceneGraph scene in Qt QuickRendering an OpenSceneGraph scene in QML Rendering an OpenSceneGraph scene in QML
Hi, Have you seen the qml ogre demo? I assume you could do the same thing for osg. Regards, Jamie -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=45692#45692 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Rendering an OpenSceneGraph scene in Qt QuickRendering an OpenSceneGraph scene in QML Rendering an OpenSceneGraph scene in QML
Hiya, I looked at the osgQt/GraphicsWindowQt class implementation. I think what it does is render to Qt's QGLWidget's OpenGL context using swapBuffers(). Again... being new to OpenGL, a lot of this stuff doesn't really make too much sense to me, but the swapBuffers() call is QGLWidget specific. There's no equivalent in the QDeclarative API, so I couldn't find a way of exposing QGLWidget to QtQuick directly as a QDeclarative item. From what I've read online, I think that the best that can be done is creating a custom QDeclarativeItem, and overriding its paint() method, where direct OpenGL calls can be made. I tested this out and it works... I can, for instance, paint geometry using glBegin() and glEnd() exactly as you'd expect, and it'll show up in a QML object. So I think I need to use OSG to render my scene as a texture to an FBO, then draw that using straight OpenGL calls. This is where I'm totally lost though. So if I had to rephrase the problem: Assuming I had a viewport I could only paint to using native OpenGL calls, how could I render an OpenSceneGraph scene in it? Regards, Preet On Fri, Feb 17, 2012 at 4:27 AM, Philipp Moeller philipp.moel...@geometryfactory.com wrote: Preet prismatic.proj...@gmail.com writes: Hey all. I have an OpenSceneGraph tree I'd like to have displayed in QtQuick. I'd like the user to be able to interact with the scene where the mouse can zoom/pan/rotate the camera, just like osgViewer allows. I saw that there were a couple of examples (osgQtWidgets and osgQtBrowser), but they're a little over my head. I think the right way to start trying this is by starting with the QtDeclarative model (http://doc.qt.nokia.com/4.7-snapshot/qtdeclarative.html)... but I'm not too sure where to go from here. Does anyone have any suggestions? Regards, Pris Hi Preet, I've looked into integrating OpenSceneGraph into QML. You might want to start with the osgviewerQt to get started with a viewer integrated into Qt. Then you should have a look at [1] to see how you can expose your osg widget to QML. If I ever get something reusable up and running, I'll let the list know. If you go down the route of exposing scene graph functionality in your Qt application you will need to roll some implementation of QAbstractItemModel, which is a real pain. It get's easier if you restrain yourself to graphs where each element only has a single parent. If you can throw something together I would be really interested in it, so let me know. [1] : http://developer.qt.nokia.com/doc/qt-4.8/gettingstartedqml.html#exposing-c-classes-to-qml -- Philipp Moeller GeometryFactory ___ 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] Rendering an OpenSceneGraph scene in Qt QuickRendering an OpenSceneGraph scene in QML Rendering an OpenSceneGraph scene in QML
Preet prismatic.proj...@gmail.com writes: Hey all. I have an OpenSceneGraph tree I'd like to have displayed in QtQuick. I'd like the user to be able to interact with the scene where the mouse can zoom/pan/rotate the camera, just like osgViewer allows. I saw that there were a couple of examples (osgQtWidgets and osgQtBrowser), but they're a little over my head. I think the right way to start trying this is by starting with the QtDeclarative model (http://doc.qt.nokia.com/4.7-snapshot/qtdeclarative.html)... but I'm not too sure where to go from here. Does anyone have any suggestions? Regards, Pris Hi Preet, I've looked into integrating OpenSceneGraph into QML. You might want to start with the osgviewerQt to get started with a viewer integrated into Qt. Then you should have a look at [1] to see how you can expose your osg widget to QML. If I ever get something reusable up and running, I'll let the list know. If you go down the route of exposing scene graph functionality in your Qt application you will need to roll some implementation of QAbstractItemModel, which is a real pain. It get's easier if you restrain yourself to graphs where each element only has a single parent. If you can throw something together I would be really interested in it, so let me know. [1] : http://developer.qt.nokia.com/doc/qt-4.8/gettingstartedqml.html#exposing-c-classes-to-qml -- Philipp Moeller GeometryFactory ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Rendering an OpenSceneGraph scene in Qt QuickRendering an OpenSceneGraph scene in QML Rendering an OpenSceneGraph scene in QML
Hey all. I have an OpenSceneGraph tree I'd like to have displayed in QtQuick. I'd like the user to be able to interact with the scene where the mouse can zoom/pan/rotate the camera, just like osgViewer allows. I saw that there were a couple of examples (osgQtWidgets and osgQtBrowser), but they're a little over my head. I think the right way to start trying this is by starting with the QtDeclarative model (http://doc.qt.nokia.com/4.7-snapshot/qtdeclarative.html)... but I'm not too sure where to go from here. Does anyone have any suggestions? Regards, Pris ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
