Hi Robert, Hi Scott,
2008/3/27, Robert Osfield <[EMAIL PROTECTED]>: > > Hi Scott, > > The best person to answer these questions will be David Callu as he > implemented the shapefile support in VPB. I'll wait to see if David > replies as he'll be able to provide better answers. I'd have to dig > into the code to refresh myself to answer them, which.. well isn't > much different from you doing it. > > > Robert. > > > On Thu, Mar 27, 2008 at 12:49 PM, Hulet, Scott S <[EMAIL PROTECTED]> > wrote: > > Robert, > > > > Sorry for the overwhelming post! Let's start out with these > > inter-related options. I'd like to understand how to integrate feature > > data into the DB via osgdem. It appears that the following options are > > involved. Are there others? Can you explain how these work? Thanks! > > > > When shapefile (.shp) is loaded by osgdb_shp plugin , if the corresponding datafile (.dbf) is in the same directory, it is loaded too and used to populate osgSim::ShapeAttribute class. In the datafile .dbf, there are zero or many attributes by shape define in the shapefile. Each attribut have a name and a value. osg::Geometry create by osgdb_shp contain an osgSim::ShapeAttributeList in UserData variable. This list contain zero or many osgSim::ShapeAttribute. This attribute are used by VPB : > --building <filename> Specify building outlines using > > (How does this work; extrusion? Any controls?) shape define in "filename" are extruded to create a volume (building) there are any other control on this process > shapefiles. > > --forest <filename> Specify forest outlines using > > (How does this work; extrusion? Any controls?) each vertices in shape define in "filename" are extrude to create a simple line (tree) same process as the --building option, so no control > shapefiles > > --height Set the height to use for > > asscociated (Both buildings and/or forests?) overload the height value used to extrude building or forest > > shapefiles. > > --height-attribute Set the attribute name for > height (Both buildings and/or forests?) > > attributes used in > shapefile/dbase files. > set the name of the osgSim::ShapeAttribute which contain the height value used to extrude the building or forest shapefile there are any other shapefile option During the osg DataBase creation process, in vpb::DestinationTile::createScene() method, each shapefile model are transformed and placed in the scene by a vpb::ShapeFilePlacer. This vpb::ObjectPlacer based class extrude and adjust position and elevation of the model to match the terrain elevation. this is the place to add shapefile feature. Then modify vpb::CommandLine to insert your own command line option. HTH David Callu
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
