Hi Jordi Torres,
Thanks a lot for the nice help.
To day I did some experiments.
The AR library is giving pose matrix. Now I decomposed it into tans, rotation
and scale vectors. And checked with each one by matrix multiplication. I found
that the translation vector is irrelevant. I got transpose as like 17.98
14.45 155.76 ect. With these values the model is not appread on the screen. If
I set the trans vect as 0.0 0.0 1 then the model is at the center of the screen.
I don't know why this behavior. I am posting in QCAR forum for help.
Is there any think I need to to with OSG?
Here is the complete code again
Code:
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->addEventHandler(new
osgGA::StateSetManipulator(_viewer->getCamera()->getOrCreateStateSet()));
_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,screenWidth, screenHeight);
_viewer->getCamera()->setClearMask(GL_DEPTH_BUFFER_BIT );
modelSwitch=new osg::Switch;
trans=new osg::MatrixTransform();
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");
trans->addChild(loadedModel.get());
modelSwitch->addChild(trans.get());
}
_root->addChild(modelSwitch.get());
_viewer->setSceneData(NULL);
_viewer->setSceneData(_root.get());
_manipulator->getNode();
_viewer->home();
mload=false;
}
modelSwitch->setAllChildrenOff();
modelSwitch->setChildValue(trans,1);
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());
osg::Matrix mat;
mat.set(osg::Matrix(modelViewMatrix.data));
osg::Vec3f tr,scal;
osg::Quat rot,so,rot1,rot2;
mat.decompose(tr,rot,scal,so);
mat=osg::Matrix(
osg::Matrix::scale(osg::Vec3(scal.x(),scal.y(),scal.z())) *
osg::Matrix::translate(0.0,0.0,1.0) * osg::Matrix::rotate(rot));
trans->setMatrix(mat);
_viewer->frame();
Renderer::getInstance().end();
break;
}
I am reading the OSG model every time while rendering. That is for every
viewer->frame(). If not reading the model is displayed only once. Do I need to
take any clean up steps after viewer->frame().
Once again I will go through osgAndroid ( https://gitorious.org/osgandroid )
example.
Once again thank you very much for the nice help.
...
Thank you!
Cheers,
Koduri
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=49799#49799
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