Hi Preet, This look to be an issue of depth precision, the usual way one tackles this problem of rendering two flat objects on top of each other is to use osg::PolygonOffset (see OpenGL docs on glPolygonOffset).
Robert. On 20 January 2013 05:42, Preet <[email protected]> wrote: > I have two geometries close together -- one is an osgText object and the > other is just a simple set of planar triangles laying flat behind the text. > The two are separated by a small distance. Both objects are parented with an > AutoTransform. > > When I move my camera around in a certain way, the object behind the text > bleeds through it. When the camera is not being moved, both objects appear > fine. I made a small video because I had trouble capturing the issue with a > screenshot. In the video, the text is purple. The object in question is the > black rectangle with the purple border behind the text. > > http://www.youtube.com/watch?v=htj168dJHGw > > When I move the camera relatively fast, you can see the black rectangle's > triangles bleed through the text momentarily. > > I tried messing around with the placement of the objects; I even tried to > increase the distance between the text and the geometry behind it a > substantial amount but this didn't seem to have an effect. Both objects are > in the same render bin. > > I've never really seen something like this happen before where the effect is > only present *while* the scene is moving around. If I move the camera around > slow enough or keep it still, the effect isn't visible. > > Does anyone have any ideas as to what the issue is here? > > > Preet > > _______________________________________________ > 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
