Hi All Consider we have a lot of points in 3D and we need to render some additional information around them in screen space. For example, for very 3D point we need to render rectangular panel (with dimensions Mpx x Npx), line from this panel to the point in 3D and some text on the panel. So we create a HUD node (as in "osgText, HUD, RenderBins" tutorial) and an osg::MatrixTransform nodes, which translate our complex labels (consisting of panel, line and text) to the specified coordinates on the screen (there is no problem with this step). On each frame I have to inform screen-space nodes about global MVPW matrix to properly compute it's new position on the screen from the global 3D positions of the reference points.
I've tried osgUtil::CullVisitor, but it's MVPW matrix it already post multiplied by osg::Projection matrix and cannot be used. So I need to cache MVPW matrix of the root node and update labels' nodes according to it. What is the best way to inform children of the HUD-node about changes in the root's MVPW matrix? Here is the link to the image with an example of such complex label (and some trivial labels): http://uranus-sdp.com/uploads/posts/2009-03/1237821576_cwp_2.jpg The complex label is in upper-right part of the screen (AFL345). It is connected to the point in 3D (square with inner cross). Yurii _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
