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>
35 #include <simgear/scene/model/ModelRegistry.hxx>
37 #include "userdata.hxx"
38 #include "SGReaderWriterBTG.hxx"
39 #include "ReaderWriterSPT.hxx"
40 #include "ReaderWriterSTG.hxx"
42 // the following are static values needed by the runtime object
43 // loader. However, the loading is done via a call back so these
44 // values cannot be passed as parameters. The calling application
45 // needs to call sgUserDataInit() with the appropriate values before
46 // building / drawing any scenery.
48 static bool _inited = false;
49 static SGPropertyNode *root_props = NULL;
51 // Because BTG files are now loaded through the osgDB::Registry, there
52 // are no symbols referenced by FlightGear in this library other than
53 // sgUserDataInit. But the libraries are all statically linked, so
54 // none of the other object files in this library would be included in
55 // the executable! Sticking the static proxy here forces the BTG code
58 osgDB::RegisterReaderWriterProxy<SGReaderWriterBTG> g_readerWriter_BTG_Proxy;
60 osgDB::RegisterReaderWriterProxy<simgear::ReaderWriterSTG> g_readerWriterSTGProxy;
61 simgear::ModelRegistryCallbackProxy<simgear::LoadOnlyCallback> g_stgCallbackProxy("stg");
63 osgDB::RegisterReaderWriterProxy<simgear::ReaderWriterSPT> g_readerWriterSPTProxy;
64 simgear::ModelRegistryCallbackProxy<simgear::LoadOnlyCallback> g_sptCallbackProxy("spt");
67 void sgUserDataInit( SGPropertyNode *p ) {
74 SGPropertyNode* getPropertyRoot()