Hi,
I am using a 3rd party lib(QCAR) with OSG on Android. This lib clears OpenGLES
graphics context every time after rendering a frame. So the model renders only
once (first time) and disappears on the viewer. So to preserve graphics
context i did as follows
---> Created Embeded View
---> Captured current Graphics context as follws
Code:
m_lastStateSet = new osg::StateSet();
_viewer->getCamera()->getGraphicsContext()->getState()->captureCurrentState(*m_lastStateSet.get());
---> In RendererFrame function
---> Restore graphics context as follows
Code:
osgState = _viewer->getCamera()->getGraphicsContext()->getState();
osgState->reset();
osgState->apply(m_lastStateSet.get());
---> render Frame Code
----> Save the current state of the graphics context as follows
Code:
_viewer->getCamera()->getGraphicsContext()->getState()->captureCurrentState(*m_lastStateSet.get());
This works fine with OpenGLES1. The same is not working if I build the same
code with OpenGLES2 version.
Can you please help me what could be the mistake.
Here is the complete code
OSG INIT Function
Code:
void OsgApp::initOsgWindow(int sW,int sH)
{
_viewer = new osgViewer::Viewer();
embeddedWindow=_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,sW, sH);
_viewer->getCamera()->setClearMask(GL_DEPTH_BUFFER_BIT );
modelSwitch=new osg::Switch;
LOG("READING Model_0");
readModels("/mnt/sdcard/test/0.osg",MODEL_1);
_root->addChild(modelSwitch.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);
[color=red][b]m_lastStateSet = new osg::StateSet();
_viewer->getCamera()->getGraphicsContext()->getState()->captureCurrentState(*m_lastStateSet.get());
[/b][/color]
}
Renderer Function
Code:
void OsgApp::renderer(osg::Matrix mat)
{
[color=red] [b]osgState =
_viewer->getCamera()->getGraphicsContext()->getState();
osgState->reset();
osgState->apply(m_lastStateSet.get()); [/b][/color]
renderModel_1(mat);
_viewer->frame();
[color=red][b]_viewer->getCamera()->getGraphicsContext()->getState()->captureCurrentState(*m_lastStateSet.get());
[/b] [/color]
}
...
Thank you!
Cheers,
Koduri
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=51032#51032
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