Re: [osg-users] WGS-84 osgTerrain
On Fri, September 7, 2007 15:45, Argentieri, John-P63223 wrote: Hello again, and a good day to you. We use a lo-fi earth model generated by osgdem. When we do a terrain intersection, then convert to a 0-altitude coordinate, the location we get is inaccurate due to the fact that the model's geometry is an approximation of the shape of the earth. Is there a way to use osgTerrain to find the intersection of a vector with a WGS-84 earth? Thanks, John ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Hi John, please let me know if you get any further or any input on that issue. I'll probably have to do the same thing in a couple of weeks. Regards, blinkeye ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] GL_CULL_FACE GL_BLEND GL_DEPTH_TEST
Hello fellow osg users I've been trying for days to implement what I thought of as a simple thing: A translucent figure like a dome, a cubus or a triangle where faces behind don't shine through and which inside faces are rendered when the camera is inside the figure. I've managed that by using GL_CULL_FACE osg::StateSet* states = new osg::StateSet(); states-setRenderingHint( osg::StateSet::TRANSPARENT_BIN ); states-setRenderBinDetails( 2, RenderBin ); states-setMode( GL_CULL_FACE, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON ); states-setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON ); states-setMode( GL_DEPTH_TEST, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON ); So far so good, but now the problem: If the camera is inside the translucent figure I don't see the inside faces. Is there something I'm doing wrong or shouldn't now the inside faces be drawn (but not the outside faces)? I know this is more an OpenGL issue but I can't seem to find the answer anywhere. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
