The camera's orthonormal frame can be obtained as follows... osg::Matrixd vm = View->getCamera()->getViewMatrix(); osg::Vec3d Forward; osg::Vec3d Right; osg::Vec3d Up; Forward[0] = -vm(0,2); Forward[1] = -vm(1,2); Forward[2] = -vm(2,2); Right[0] = vm(0,0); Right[1] = vm(1,0); Right[2] = vm(2,0); Up[0] = vm(0,1); Up[1] = vm(1,1); Up[2] = vm(2,1);
The "Forward" vector is the normal to the view plane...:) -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Yurii Monakov Sent: Tuesday, April 28, 2009 10:32 AM To: OpenSceneGraph Users Subject: Re: [osg-users] The normal of my screen Computing (center - eye).normalize() we are doing unnecessary work. Look direction could be obtained directly from camera's matrix. 2009/4/28 Jean-Sébastien Guay <jean-sebastien.g...@cm-labs.com> Hi Mangu, If the the center is what I look at, so basically it's the normal of the plane ( described by the screen) isn't it?? Both eye and center are points, not vectors. So center can't be the normal of the screen's plane... (center - eye).normalize() is. J-S -- ______________________________________________________ Jean-Sebastien Guay jean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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