Hi all, I'm trying to simply project any 3D point ,which is already in world space, into screen space.
I know how to do it without osg : screen space coords = bias matrix * camera projection matrix * camera view matrix * world space coordinates Those coordinates are in [0, 1] range, so multiply by viewport dimensions to get window coordinates. but i do not succeed doing it with osg because i m still not familiar with it... My current code is * osg::Camera * cam = _view->getCamera(); osg::Matrix viewMatrix = cam->getViewMatrix(); osg::Matrix projectionMatrix = cam->getProjectionMatrix(); osg::Matrix windowMatrix = cam->getViewport()->computeWindowMatrix(); osg::Vec4d screenCoords = windowMatrix.postMult (projectionMatrix.postMult (viewMatrix.postMult (_refPoint)));* I saw windowMatrix is the bias matrix and the viewport scale. refPoint is a Vec4d with w = 1. ( the 3D point i want to project into screen space ) and as operator * is not defined to multiply a Matrix with an Vec4d, i use postMult function. But i dont get a valid result... what did i missed ? :-x Thanks for your attention Regards, Harold
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