Hi Gianluca, You can use the osg::Material StatAattributeto control colour - attach this to a StateSet that decorate a subgraph and this state will be inherted down to the leaves. This only works when OpenGL lighting is on though as it uses glMaterial to set the material parameters. As a general note glFunction maps to osg::Function.
Robert. On Dec 18, 2007 2:19 PM, Gianluca Natale <[EMAIL PROTECTED]> wrote: > > > > > Hi all, > > I'm new to OSG. > > I cannot find a way to change the primary color of OpenGL in order to draw > the same > > object twice in two different places with two different colors. > > > > I mean that in OpenGL I can do that in this way: > > glColor3fv(color1); > > // set model view matrix > > // draw object A > > glColor3fv(color2); > > //set model view matrix > > //draw object A > > > > Instead in OSG I should create two geodes with the same geometry, but > different color, > > in order to do that. I tried to search a way to change the color in the > osg::MatrixTransform, > > without finding it. Actually I don't want to duplicate the geometry data > just to change a color! > > > > Furthermore, changing the primary color in an osg::Node would be really > useful to > > quickly change the behavior of lit objects. I mean that in OpenGL I can set > material properties > > by: > > > > glColorMaterial(...); > > > > and then change the behaviour just changing the primary color, before > drawing the objects. > > > > I hope someone can help me. > > Thanks in advance, > > Gianluca Natale. > > > _______________________________________________ > 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
