From Paul Martz, changed Vec3 to Vec3d to ensure that the lazy evaluation of computeBound  work properly.
From Paul Martz, changed Vec3 to Vec3d to ensure that the lazy evaluation of computeBound  work properly.


git-svn-id: 23b6355f2bb369032457de4eb5f713ee134f73a8@4908 16af8721-9629-0410-8352-f15c8da7e697

joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg