1 // userdata.hxx -- two classes for populating ssg user data slots in association
2 // with our implimenation of random surface objects.
4 // Written by David Megginson, started December 2001.
6 // Copyright (C) 2001 - 2003 Curtis L. Olson - http://www.flightgear.org/~curt
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 # include <simgear_config.h>
28 #include <osgDB/Registry>
30 #include <simgear/sg_inlines.h>
31 #include <simgear/math/sg_geodesy.hxx>
32 #include <simgear/math/sg_random.h>
33 #include <simgear/scene/material/mat.hxx>
34 #include <simgear/scene/material/matmodel.hxx>
36 #include "SGModelBin.hxx"
37 #include "userdata.hxx"
38 #include "SGReaderWriterBTG.hxx"
40 // the following are static values needed by the runtime object
41 // loader. However, the loading is done via a call back so these
42 // values cannot be passed as parameters. The calling application
43 // needs to call sgUserDataInit() with the appropriate values before
44 // building / drawing any scenery.
46 static bool _inited = false;
47 static SGPropertyNode *root_props = NULL;
49 // Because BTG files are now loaded through the osgDB::Registry, there
50 // are no symbols referenced by FlightGear in this library other than
51 // sgUserDataInit. But the libraries are all statically linked, so
52 // none of the other object files in this library would be included in
53 // the executable! Sticking the static proxy here forces the BTG code
55 osgDB::RegisterReaderWriterProxy<SGReaderWriterBTG> g_readerWriter_BTG_Proxy;
57 void sgUserDataInit( SGPropertyNode *p ) {
62 osg::Node* sgGetRandomModel(SGMatModel *obj, mt *seed) {
63 return obj->get_random_model( root_props, seed );
68 SGPropertyNode* getPropertyRoot()