1 // materialmgr.cxx -- class to handle material properties
3 // Written by Curtis Olson, started May 1998.
5 // Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 # include <simgear_config.h>
28 #include <simgear/compiler.h>
29 #include <simgear/constants.h>
30 #include <simgear/structure/exception.hxx>
35 #include <osgDB/Registry>
37 #include <simgear/debug/logstream.hxx>
38 #include <simgear/misc/sg_path.hxx>
39 #include <simgear/misc/sgstream.hxx>
40 #include <simgear/props/props_io.hxx>
41 #include <simgear/props/condition.hxx>
42 #include <simgear/scene/tgdb/userdata.hxx>
43 #include <simgear/threads/SGThread.hxx>
44 #include <simgear/threads/SGGuard.hxx>
49 #include "Technique.hxx"
55 class SGMaterialLib::MatLibPrivate
62 SGMaterialLib::SGMaterialLib ( void ) :
67 // Load a library of material properties
68 bool SGMaterialLib::load( const string &fg_root, const string& mpath,
69 SGPropertyNode *prop_root )
71 SGPropertyNode materials;
73 SG_LOG( SG_INPUT, SG_INFO, "Reading materials from " << mpath );
75 readProperties( mpath, &materials );
76 } catch (const sg_exception &ex) {
77 SG_LOG( SG_INPUT, SG_ALERT, "Error reading materials: "
81 osg::ref_ptr<osgDB::Options> options
83 options->setObjectCacheHint(osgDB::Options::CACHE_ALL);
84 options->setDatabasePath(fg_root);
85 int nMaterials = materials.nChildren();
86 for (int i = 0; i < nMaterials; i++) {
87 const SGPropertyNode *node = materials.getChild(i);
88 if (!strcmp(node->getName(), "material")) {
89 SGSharedPtr<SGMaterial> m = new SGMaterial(options.get(), node, prop_root);
91 std::vector<SGPropertyNode_ptr>names = node->getChildren("name");
92 for ( unsigned int j = 0; j < names.size(); j++ ) {
93 string name = names[j]->getStringValue();
94 // cerr << "Material " << name << endl;
95 matlib[name].push_back(m);
97 SG_LOG( SG_TERRAIN, SG_DEBUG, " Loading material "
98 << names[j]->getStringValue() );
101 SG_LOG(SG_INPUT, SG_WARN,
102 "Skipping bad material entry " << node->getName());
109 // find a material record by material name
110 SGMaterial *SGMaterialLib::find( const string& material ) const
112 SGMaterial *result = NULL;
113 const_material_map_iterator it = matlib.find( material );
115 // We now have a list of materials that match this
116 // name. Find the first one that either doesn't have
117 // a condition, or has a condition that evaluates
119 material_list::const_iterator iter = it->second.begin();
120 while (iter != it->second.end()) {
122 if (result->valid()) {
132 void SGMaterialLib::refreshActiveMaterials()
134 active_material_cache newCache;
135 material_map_iterator it = matlib.begin();
136 for (; it != matlib.end(); ++it) {
137 newCache[it->first] = find(it->first);
140 // use this approach to minimise the time we're holding the lock
141 // lock on the mutex (and hence, would block findCached calls)
142 SGGuard<SGMutex> g(d->mutex);
143 active_cache = newCache;
146 SGMaterial *SGMaterialLib::findCached( const string& material ) const
148 SGGuard<SGMutex> g(d->mutex);
150 active_material_cache::const_iterator it = active_cache.find(material);
151 if (it == active_cache.end())
158 SGMaterialLib::~SGMaterialLib ( void ) {
159 SG_LOG( SG_GENERAL, SG_INFO, "SGMaterialLib::~SGMaterialLib() size=" << matlib.size());
162 const SGMaterial *SGMaterialLib::findMaterial(const osg::Geode* geode)
166 const simgear::EffectGeode* effectGeode;
167 effectGeode = dynamic_cast<const simgear::EffectGeode*>(geode);
170 const simgear::Effect* effect = effectGeode->getEffect();
173 const SGMaterialUserData* userData;
174 userData = dynamic_cast<const SGMaterialUserData*>(effect->getUserData());
177 return userData->getMaterial();