On 4/12/2011 1:11 AM, Martin Haffner wrote: > Thanks for your answer! > Well, the last 3 children of the LOD node are Geodes where each of the Geode > contains about 30 to 70 Drawables. They represent a triangulated road on 3 > LOD (high, mid, low poly count). > When the user edits the road I have to retessellate and create new vertices. > Thus I have to delete all old Drawables (of all 3 Geodes) and add the new > Drawables (with the new Vertices). > I just fear that all the delete and new calls may be slow and I wonder if > there is a better way to do this.
I don't know how much overhead the Drawable remove/add would cause, really. I believe you could simply construct new arrays of vertices and primitives, and then swap them into the existing drawables. Another source of overhead is sometimes the allocation and deallocation of the std::vector that store the drawable vertex/texcoord/normal/color/primitive arrays. Consider not removing and deleting the old arrays, but rather, removing, clearing and reusing them. -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. Contracting. "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
