There is a method for drawing object outlines in OpenGL by setting backfacing polygons to be rendered with lines and overriding the backface color to the desired outline color. I am trying to apply this method to models loaded from a file into a scenegraph. The first step is easy enough: obtain the model's StateSet and apply a PolygonMode( BACK, LINE ) StateAttribute. However, I cannot find an obvious way to override the polygon back face color, short of either directly editing the loaded model file or applying a vertex and fragment shader. Is there something simple I am missing?
Additionally, when the PolygonMode attribute is set as above, I see warning messages as follows: Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) Is there something I need to do to avoid this error? It doesn't seem to adversely affect rendering. - Ian Zeilstra This is an e-mail from General Dynamics Land Systems. It is for the intended recipient only and may contain confidential and privileged information. No one else may read, print, store, copy, forward or act in reliance on it or its attachments. If you are not the intended recipient, please return this message to the sender and delete the message and any attachments from your computer. Your cooperation is appreciated. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
