Hello Harash,
It is difficult for me to understand what you are trying to do. If you are trying to convert something from 3D coordinates to 2D window coordinates then you want to use this function: sceneView()->projectObjectIntoWindow( position, windowPosition ); _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harash Sharma Sent: Thursday, September 06, 2007 10:30 AM To: Public OpenSceneGraph Users discussion list. Subject: Re: [osg-users] Computing Image Co-ordinates Hi Thanks to all. I now know the problem was probably too simplistic for anyone to waste their precious time. I was able to figure out the way to compute the image co-ordinates from world object co-ordinates. I am writing here the method in case some newbie like me needs it. If the World Co-ordinate of the object Point is P, Then we can obtain the Image co-ordinate C as : 1. C1 = P * MatView * MatProj * MatWind 2. C = C1 / C1.w() where MatView:- View Matrix obtained through osg::Camera::getViewMatrix() MatProj:- Projection Matrix obtained through osg::Camera::getProjectionMatrix() MatWind:- Window Matrix obtained through osg::Viewport::computeWindowMatrix() Here the viewport is set to the size of the image to which the scene is rendered through RTT. Regards Harash Harash Sharma <[EMAIL PROTECTED]> wrote: Hi All, I want some help regarding computation of projected model co-ordinates. The problem is like this. I have a cuboidal model (car). I have been able to compute its bounding box -- so I know the world co-ordinates of the car bound corners. The scene is being rendered to a texture with an image size of MxN Pixels. I would like to calculate the image co-ordinates corresponding to the 8 bounding box corner co-ordinates. Is there any function available in OSG which I can use to achieve this. If not, it would be very kind of you to indicate some pointers on how to do it. I thought it would be as simple as multiplying the model vectors by the osg::View::getCamera()->getViewMatrix() * osg::View::getCamera()->getProjectionMatrix(), but I think I am missing something. Please Help. Thanks in advance. Regards Harash _____ Sick sense of humor? Visit Yahoo! TV's Comedy <http://us.rd.yahoo.com/evt=47093/*http:/tv.yahoo.com/collections/222> with an Edge to see what's on, when. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _____ Boardwalk for $500? In 2007? Ha! Play <http://us.rd.yahoo.com/evt=48223/*http:/get.games.yahoo.com/proddesc?gameke y=monopolyherenow> Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.
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