Hi J-S,
Here's what I'm doing:
Code:
unsigned int width, height;
osg::GraphicsContext::WindowingSystemInterface* wsi =
osg::GraphicsContext::getWindowingSystemInterface();
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0),
width, height);
viewer->getCamera()->setProjectionMatrixAsPerspective(45.,
width/height, 1.,2.);
viewer->getCamera()->setViewMatrixAsLookAt(osg::Vec3(0.,0.,-5.),
osg::Vec3(0.,0.,0.), osg::Vec3(0.,1.,0.));
viewer->getCamera()->setViewport(0,0,width,height);
viewer->getCamera()->setClearColor(osg::Vec4(0.f,0.f,0.f,1.f));
osg::Matrix MVPW( viewer_->getCamera()->getViewMatrix() *
viewer_->getCamera()->getProjectionMatrix() *
viewer_->getCamera()->getViewport()->computeWindowMatrix());
osg::Matrixd inverseMVPW = osg::Matrixd::inverse(MVPW);
osg::Vec3 near_point = osg::Vec3(obj->getX(),(1-obj->getY()), 0.f) *
inverseMVPW;
pat_marker->setPosition(near_point);
Where the obj->getX and getY is already normalized, the values range between 0
and 1. Anyway, when I try to draw objects on the four corners of the screen, I
only get one on the middle bottom.
Now, IF i multiply the normalized values by the size of the screen
("unnormalizing" them), AND set the near plane of the perspective matrix to at
least 100, i can see all the markers on the screen, although they are really
small and not exactly on the four corners.
Sorry to bother you so much with this J-S but I just can't figure out what am I
doing wrong! I'm sure it's something really simple!
Thanks a lot... again!
Cheers,
Theo
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=29829#29829
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