simgear/scene/model/modellib.cxx

   1 // Copyright (C) 2008 Till Busch buti@bux.at
   2 //
   3 // This program is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU General Public License as
   5 // published by the Free Software Foundation; either version 2 of the
   6 // License, or (at your option) any later version.
   7 //
   8 // This program is distributed in the hope that it will be useful, but
   9 // WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16 //
  17
  18 #ifdef HAVE_CONFIG_H
  19 #  include <simgear_config.h>
  20 #endif
  21
  22 #include <boost/algorithm/string.hpp>
  23
  24 #include <osg/PagedLOD>
  25 #include <osg/ProxyNode>
  26 #include <osgDB/ReadFile>
  27 #include <osgDB/WriteFile>
  28 #include <osgDB/Registry>
  29
  30 #include <simgear/constants.h>
  31 #include <simgear/props/props.hxx>
  32 #include <simgear/props/props_io.hxx>
  33 #include <simgear/scene/model/model.hxx>
  34 #include <simgear/scene/model/ModelRegistry.hxx>
  35 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
  36 #include <simgear/misc/ResourceManager.hxx>
  37
  38 #include "SGReaderWriterXML.hxx"
  39
  40 #include "modellib.hxx"
  41
  42 #include <simgear/math/SGMath.hxx>
  43
  44 using std::string;
  45 using namespace simgear;
  46
  47 osgDB::RegisterReaderWriterProxy<SGReaderWriterXML> g_readerWriter_XML_Proxy;
  48 ModelRegistryCallbackProxy<LoadOnlyCallback> g_xmlCallbackProxy("xml");
  49
  50 SGPropertyNode_ptr SGModelLib::static_propRoot;
  51 SGModelLib::panel_func SGModelLib::static_panelFunc = NULL;
  52
  53 ////////////////////////////////////////////////////////////////////////
  54 // Implementation of SGModelLib.
  55 ////////////////////////////////////////////////////////////////////////
  56 void SGModelLib::init(const string &root_dir, SGPropertyNode* root)
  57 {
  58     osgDB::Registry::instance()->getDataFilePathList().push_front(root_dir);
  59     static_propRoot = root;
  60 }
  61
  62 void SGModelLib::setPanelFunc(panel_func pf)
  63 {
  64   static_panelFunc = pf;
  65 }
  66
  67 std::string SGModelLib::findDataFile(const std::string& file,
  68   const osgDB::Options* opts,
  69   SGPath currentPath)
  70 {
  71   if (file.empty())
  72     return file;
  73   SGPath p = ResourceManager::instance()->findPath(file, currentPath);
  74   if (p.exists()) {
  75     return p.str();
  76   }
  77
  78   // finally hand on to standard OSG behaviour
  79   return osgDB::findDataFile(file, opts);
  80 }
  81
  82 SGModelLib::SGModelLib()
  83 {
  84 }
  85
  86 SGModelLib::~SGModelLib()
  87 {
  88 }
  89
  90 namespace
  91 {
  92 osg::Node* loadFile(const string& path, SGReaderWriterOptions* options)
  93 {
  94     using namespace osg;
  95     using namespace osgDB;
  96     if (boost::iends_with(path, ".ac"))
  97         options->setInstantiateEffects(true);
  98     ref_ptr<Node> model = readRefNodeFile(path, options);
  99     if (!model)
 100         return 0;
 101     else
 102      return model.release();
 103 }
 104 }
 105
 106 osg::Node*
 107 SGModelLib::loadModel(const string &path,
 108                        SGPropertyNode *prop_root,
 109                        SGModelData *data,
 110                        bool load2DPanels)
 111 {
 112     osg::ref_ptr<SGReaderWriterOptions> opt;
 113     opt = SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());
 114     opt->setPropertyNode(prop_root ? prop_root: static_propRoot.get());
 115     opt->setModelData(data);
 116
 117     if (load2DPanels) {
 118        opt->setLoadPanel(static_panelFunc);
 119     }
 120
 121     osg::Node *n = loadFile(path, opt.get());
 122     if (n && n->getName().empty())
 123         n->setName("Direct loaded model \"" + path + "\"");
 124     return n;
 125
 126 }
 127
 128 osg::Node*
 129 SGModelLib::loadDeferredModel(const string &path, SGPropertyNode *prop_root,
 130                              SGModelData *data)
 131 {
 132     osg::ProxyNode* proxyNode = new osg::ProxyNode;
 133     proxyNode->setLoadingExternalReferenceMode(osg::ProxyNode::DEFER_LOADING_TO_DATABASE_PAGER);
 134     proxyNode->setFileName(0, path);
 135
 136     osg::ref_ptr<SGReaderWriterOptions> opt;
 137     opt = SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());
 138     opt->setPropertyNode(prop_root ? prop_root: static_propRoot.get());
 139     opt->setModelData(data);
 140     opt->setLoadPanel(static_panelFunc);
 141     if (SGPath(path).lower_extension() == "ac")
 142         opt->setInstantiateEffects(true);
 143     if (!prop_root || prop_root->getBoolValue("/sim/rendering/cache", true))
 144         opt->setObjectCacheHint(osgDB::Options::CACHE_ALL);
 145     else
 146         opt->setObjectCacheHint(osgDB::Options::CACHE_NONE);
 147     proxyNode->setDatabaseOptions(opt.get());
 148
 149     return proxyNode;
 150 }
 151
 152 osg::Node*
 153 SGModelLib::loadPagedModel(const string &path, SGPropertyNode *prop_root,
 154                            SGModelData *data)
 155 {
 156     osg::PagedLOD *plod = new osg::PagedLOD;
 157     plod->setName("Paged LOD for \"" + path + "\"");
 158     plod->setFileName(0, path);
 159     plod->setRange(0, 0.0, 50.0*SG_NM_TO_METER);
 160
 161     osg::ref_ptr<SGReaderWriterOptions> opt;
 162     opt = SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());
 163     opt->setPropertyNode(prop_root ? prop_root: static_propRoot.get());
 164     opt->setModelData(data);
 165     opt->setLoadPanel(static_panelFunc);
 166     if (SGPath(path).lower_extension() == "ac")
 167         opt->setInstantiateEffects(true);
 168     if (!prop_root || prop_root->getBoolValue("/sim/rendering/cache", true))
 169         opt->setObjectCacheHint(osgDB::Options::CACHE_ALL);
 170     else
 171         opt->setObjectCacheHint(osgDB::Options::CACHE_NONE);
 172     plod->setDatabaseOptions(opt.get());
 173     return plod;
 174 }
 175
 176 // end of modellib.cxx