Hi, I've come across a problem when building databases with sources that have aspect ratios which are bigger than 2 when using vpbmaster - it seems to work fine with osgdem, but not with vpbmaster. I believe the problem is that several DataSet methods assume each tile is divided by two at at the most, while long and narrow (or wide and short) sources can actually be divided, at level 1, into three or more tiles. This is evident in DataSet::createNewDestinationGraph, where the j_lower value is calculated by right-shifting only. That is also why (I think...) it only affects vpbmaster builds - that piece of code is inside the if (getGenerateSubtile()) clause - that's why my osgdem builds work fine for the same dataset (no entry into that block).
So...I would be very happy to try and fix it as my first OSG/VPB contribution, but since I still don't know enough about the code, I'm afraid I'll wrack something. Looks like a more complex calculation inside the if (getGenerateSubtile()) block, which uses _C1 and _R1 would do the trick, but might not be enough. Thoughts anyone? Bye for now, Ido Schwartzman ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=39270#39270 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
