Hi Fred, The OSG by default automatically computes the near/far values during the cull traversal so you don't normally need to worry about the specific settings of near/far. The 1.0 and 10000.0 are simply default values and are of no particular note. The osg::Camera inherits from osg::CullSettings so have a look at CullSettings if you want to look at the various settings that you can control, in particular the near/far computation.
Robert. On 31 May 2013 21:54, Fred Smith <[email protected]> wrote: > Hi, > > I can render my scene graph fine when declared under the master camera in my > viewer. > What I am focused on is the Z far and near values, I must ensure they're good > - I can inspect the view and projection matrix, render the viewing frustrum > (as lines for instance), and observe that the Z far and near values are > correctly set to enclose all objects in my scene. All good. > > I then create a PRE_RENDER, RELATIVE_RF, FBO-bound slave camera, and move > over my whole scene graph to a child of this slave camera. The master camera > just has the slave camera as a child now, which itself references my original > scene graph. > > Finally I render the whole scene (viewer->frame()) and capture the contents > of my framebuffer to an image file (using shaders) : it works fine. > However, I can't get to display the viewing frustrum as I did before. The > slave's camera view/proj matrices have been set to identity in my setup, so > my expectation is that the slave camera retains the same view and projection > as the master camera, right? > > Here, the projection part is okay, but not the depth range. The Z far and > near values are way outplaced, very far away from the viewpoint (crazy values > like 1.0 to 10000.0 in my situation). > How can I get the frustrum's properties correctly? > > Thank you! > > Cheers, > Fred > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=54358#54358 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
