Hi Koduri,
As I said in the previous mail, try to set the osg GL_SURFACE as
trasparent. Take a look to osgAndroid (this project was released a week ago
by Rafa Gaitán), it has a camera example.
Cheers.
2012/9/3 Koduri Lakshmi <ankiredd...@gmail.com>
> Hi Jordi Torres,
>
> Thank you very much for the help.
>
> As you suggested I rendered the model with out transform. Model rendered
> on screen.
>
> I am using a 3rd party lib for AR tracking. This lib is configured video
> background. This config is for video background.
>
> Here is the config code
>
>
> Code:
> CameraDevice& cameraDevice = QCAR::CameraDevice::getInstance();
> VideoMode videoMode = cameraDevice.
> getVideoMode(QCAR::CameraDevice::MODE_DEFAULT);
>
> VideoBackgroundConfig config;
> config.mEnabled = true; //Enables/disables rendering of the video
> backgroun
> config.mSynchronous = true; //Enables/disables synchronization of
> video background and tracking data
> /*Relative position of the video background in the render target in
> pixels. Describes the offset of the center of video background to the
> center of the screen (viewport) in pixels. (0,0) is the center of the
> screen*/
> config.mPosition.data[0] = 0.0f;
> config.mPosition.data[1] = 0.0f;
> /*Width and height of the video background in pixels. */
> config.mSize.data[0] = screenWidth;
> config.mSize.data[1] = videoMode.mHeight
> * (screenWidth / (float)videoMode.mWidth);
> //for correct aspect ratio
>
>
>
> Renderer::getInstance().setVideoBackgroundConfig(config);
>
>
>
> After config video background I am rendering video background with the
> following statement
>
>
> Code:
> Renderer::getInstance().drawVideoBackground();
>
>
>
>
> Even with the transformation matrix the model is rendering correctly with
> out this statement. When I added this statement the model disappears on the
> screen.
>
> I tried to set Viewport and projection matrix to the viewers camera. But
> still I not able to see the 3D model on screen.
>
>
> This is the code for OSG INIT
>
>
> Code:
> if(mload)
> {
>
> LOG("Init==============");
> int x=0;
> int y=0;
>
> int width=screenWidth;
> int height=screenHeight;
>
> _viewer = new osgViewer::Viewer();
> _viewer->setUpViewerAsEmbeddedInWindow(x, y, width, height);
> _root = new osg::Group();
>
> _viewer->realize();
> _state = _root->getOrCreateStateSet();
> _state->setMode(GL_LIGHTING, osg::StateAttribute::ON);
> _state->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
> _state->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
>
> _viewer->setSceneData(_root.get());
>
> _viewer->addEventHandler(new osgViewer::StatsHandler);
> _viewer->addEventHandler(new
> osgGA::StateSetManipulator(_viewer->getCamera()->getOrCreateStateSet()));
> _viewer->addEventHandler(new osgViewer::ThreadingHandler);
> _viewer->addEventHandler(new osgViewer::LODScaleHandler);
>
> _manipulator = new osgGA::KeySwitchMatrixManipulator;
>
> _manipulator->addMatrixManipulator( '1', "Trackball", new
> osgGA::TrackballManipulator() );
> _manipulator->addMatrixManipulator( '2', "Flight", new
> osgGA::FlightManipulator() );
> _manipulator->addMatrixManipulator( '3', "Drive", new
> osgGA::DriveManipulator() );
> _manipulator->addMatrixManipulator( '4', "Terrain", new
> osgGA::TerrainManipulator() );
> _manipulator->addMatrixManipulator( '5', "Orbit", new
> osgGA::OrbitManipulator() );
> _manipulator->addMatrixManipulator( '6', "FirstPerson", new
> osgGA::FirstPersonManipulator() );
> _manipulator->addMatrixManipulator( '7', "Spherical", new
> osgGA::SphericalManipulator() );
>
> _viewer->setCameraManipulator( _manipulator.get() );
>
> _viewer->getViewerStats()->collectStats("scene", true);
>
>
> _viewer->getCamera()->setViewport(0,0,width, height);
>
>
> _viewer->getCamera()->setProjectionMatrix(osg::Matrix(projectionMatrix.data));
>
>
>
> trans=new osg::MatrixTransform();
>
>
> LOG("Load Model");
> osg::ref_ptr<osg::Node> loadedModel =
> osgDB::readNodeFile("/mnt/sdcard/OSG/lz.osg");
> if (loadedModel == 0) {
> LOG("Model not loaded");
> } else {
> LOG("Model loaded");
>
>
> loadedModel->setName("/mnt/sdcard/OSG/lz.osg");
> //_root->addChild(loadedModel);
> trans->addChild(loadedModel.get());
> }
>
> _root->addChild(trans.get());
>
> _viewer->setSceneData(NULL);
> _viewer->setSceneData(_root.get());
> _manipulator->getNode();
> _viewer->home();
>
> _viewer->getDatabasePager()->clear();
> _viewer->getDatabasePager()->registerPagedLODs(_root.get());
> _viewer->getDatabasePager()->setUpThreads(3, 1);
> _viewer->getDatabasePager()->setTargetMaximumNumberOfPageLOD(2);
> _viewer->getDatabasePager()->setUnrefImageDataAfterApplyPolicy(true,
> true);
> mload=false;
> }
>
> //_viewer->frame(); [b]If I enabled only this by commenting the following
> then the model renders correctly.[/b]
>
>
> State state = Renderer::getInstance().begin();
> // Explicitly render the Video Background
> Renderer::getInstance().drawVideoBackground(); //
>
> for(int tIdx = 0; tIdx < state.getNumActiveTrackables(); tIdx++)
> {
> // Get the trackable:
> const Trackable* trackable = state.getActiveTrackable(tIdx);
> Matrix44F modelViewMatrix =
> Tool::convertPose2GLMatrix(trackable->getPose());
>
>
> _viewer->frame();
>
> QCAR::Renderer::getInstance().end();
>
> break;
> }
>
>
>
>
>
>
>
> AR lib code to get the projection matrix
>
>
> Code:
> CameraCalibration& cameraCalibration =
> CameraDevice::getInstance().getCameraCalibration();
> projectionMatrix = Tool::getProjectionGL(cameraCalibration, 2.0f,
> 2000.0f); //Returns an OpenGL
> style projection matrix
>
>
>
> Do I need to add any thing to the viewers settings.
>
> Can you please help me where am I doing the mistake.
>
>
>
> ...
>
> Thank you!
>
> Cheers,
> Koduri
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=49724#49724
>
>
>
>
> _______________________________________________
> osg-users mailing list
> osg-users@lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
--
Jordi Torres Fabra
gvSIG 3D blog
http://gvsig3d.blogspot.com
Instituto de Automática e Informática Industrial
http://www.ai2.upv.es
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