Hi, Peter DeSantis wrote: > Hi > > thanks for that i got that to work, > but i dont understand why the bellow option where i adjust the viewer > camera directly does not work as well ? > It only seems to work if i set them as nodes and add as childs. Why is > that ? > > It seems to me to be doing the same thing
The problem is that your settings get overwritten by die camera manipulator of the viewer itself. viewer.run() does a lot of things automatically, including setting the camera matrix. This message explains it quite well: http://article.gmane.org/gmane.comp.graphics.openscenegraph.user/16143/match=setViewMatrix Have a search around for setViewMatrix, there might be other examples in the list archives as well. > > In addition i assume > > 1. using the ABSOLUTE_RF option sets the view matrix to the default > opengl (is that right ??) is it the same as the default opengl > glLoadidentity for a different axis alignment Yes, I prefer to do 2D things in the default OpenGL coords as well, x-right, y-up, zero at bottom left. > > 2. then i would have to use osg:Matrix rot; > > rot.makeRotate(90,osg::Vec3(1,0,0)); > to rotate the matrix so that i have a +x(right), +Y (up) axis > alignement. As long as your geometry and camera is in the same coords, you won't need rotations. If you use the osggeometry examples (drawn in x-z) with a camera looking along z-axis you would have to rotate to get them in x-y. jp -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
