Hello to everyone, I am currently working with OSG on a scientific visualization program, I need to display some transparent concave shapes (some isosurfaces), unfortunately I could achieve only partially correct results since I can sort transparent objects but they still appear as if they were "teared". Apparently OSG is able to sort transparent "whole" objects based on their distance from the camera but cannot sort their polygons. A possible solution would be to create a drawable for each polygon and let OSG sort the polygons as if they were objects but probably that's going to be a very slow (and ugly) procedure. Another alternative would be to "manually" sort the polygons of my mesh before every frame which sounds very similar to an hack.
The same problem can be seen also by simply visualizing a transparent sphere (disabling back face culling): from some points of view the sphere appears as if it was teared with a sharp saw-tooth-kind pattern, enabling backface culling the problem apparently disappears (since is a convex shape). Isn't there an efficient "out of the box" feature/node in OSG that sorts the polygon of one or more objects based on their distance from the camera? Cheers, Mike
<<attachment: osg.png>>
_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
