Hello everybody, I'm working on my own plateform and I must perform stereo (without head-tracking for the moment...) The problem is with my setup i'm not in front of my screen, so i need simulate head-tracking ! Naively, i set my camera at one position and one orientation (looking at the center of my screen) and i consider the user doesn't move the head during the application, but it doesn't work correctly. The scene is not mapped correctly.
So, I saw the openSG code, particularly into ProjectionCameraDecorator.cpp where stereo and head-tracking were integrated. I saw that OpenSG edits the projection surface and uses it to construct the frustum. So, in my application i defined my screen into world coordinate (with an own world center), then i set my camera with my head position relative to this world center and i set my 3D object on the world center. And then i compute my frustum as ProjectionCameraDecorator::getProjection() method. But the result is not good because i'm not seeing my scene !! If i move my camera manually, the camera seems seeing above the scene... But when i read the code, the frustum plane is constructed with camera position and not orientation. How it is possible to compute frustum without camera orientation? I suppose i'm wrong in this part but i don't understand how it's work into openSG... For me, in stereo we have two parameters, eye separation and focal length..the focal length it's the distance between camera position and the crossing point of the 2 eyes (determined by the orientation of camera). If we don't consider the orientation to compute the frustum, we are not considering the focal length parameter, isn't it? and the only way to play with stereo is the eye separation parameters, i'm wrong? If somebody can explain me how this calcul works, and how can i set my stereo cameras correctly? Thank you very much in advance. Best regards. Benoît Bossavit. ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
