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Gordon __________________________________________________________ Gordon Tomlinson Product Manager 3D Email : gtomlinson @ overwatch.textron.com __________________________________________________________ (C): (+1) 571-265-2612 (W): (+1) 703-437-7651 "Self defence is not a function of learning tricks but is a function of how quickly and intensely one can arouse one's instinct for survival" - Master Tambo Tetsura ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Cory Riddell Sent: Wednesday, February 11, 2009 4:22 PM To: OpenSceneGraph Users Subject: Re: [osg-users] forcing a square aspect ratio Nevermind, I found the problem. I was setting the projection matrix on the camera I added as a slave. Instead, I did this: // Realize the Viewer _viewer->realize(); // correct aspect ratio double fovy,aspectRatio,z1,z2; _viewer->getCamera()->getProjectionMatrixAsPerspective(fovy,aspectRatio, z1,z2); aspectRatio=double(traits->width)/double(traits->height); _viewer->getCamera()->setProjectionMatrixAsPerspective(fovy,aspectRatio, z1,z2); I'd like to update the osgviewerMFC sample app. How would I go about doing this? Cory Cory Riddell wrote: Moji the Great- I added the code you suggest to my code (and to osgviewerMFC) and it doesn't do anything. Is there something you have to do after setting the new aspect ratio to have it take effect? I was playing around and it didn't seem to matter what number I plugged in for the aspect ratio, my view always looked the same. Cory Mojtaba Fathi wrote: Hi I had the same problem, and I found a solution (but can't remember where I found it). It's like this: // Realize the Viewer _viewer->realize(); // correct aspect ratio double fovy,aspectRatio,z1,z2; camera->getProjectionMatrixAsPerspective(fovy,aspectRatio,z1,z2); aspectRatio=double(traits->width)/double(traits->height); camera->setProjectionMatrixAsPerspective(fovy,aspectRatio,z1,z2); Regards Moji the Great --- On Wed, 2/11/09, Cory Riddell <[email protected]> <mailto:[email protected]> wrote: From: Cory Riddell <[email protected]> <mailto:[email protected]> Subject: Re: [osg-users] forcing a square aspect ratio To: "OpenSceneGraph Users" <[email protected]> <mailto:[email protected]> Date: Wednesday, February 11, 2009, 12:18 AM FWIW, I've attached a screen shot of what should be a square. The Drawable code was taken from the quickstart guide and the vertices are: v->push_back(osg::Vec3(-1.f, 0.f, -1.f)); v->push_back(osg::Vec3(1.f, 0.f, -1.f)); v->push_back(osg::Vec3(1.f, 0.f, 1.f)); v->push_back(osg::Vec3(-1.f, 0.f, 1.f)); Any ideas? Cory Riddell wrote: I've been playing with osgviewerMFC and I've noticed that when I open an osg file (like cow.osg), the rendering is "stretched" to fit the aspect ratio of the containing window. For example, if I resize the app to be wide then open the cow, I get a very long cow. If I make the window short and tall then open the cow, I get a very compressed cow. Resizing the window does resize the cow, but the aspect ratio doesn't change. osgviewerQT doesn't have this problem but I don't see what's different. What controls the aspect ratio of the rendering? BTW, my cow.osg is from 2.6. Has the osg file format changed? Cory _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ________________________________ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ________________________________ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g
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