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 <osgDB/ReadFile>
  25 #include <osgDB/WriteFile>
  26 #include <osgDB/Registry>
  27
  28 #include <simgear/constants.h>
  29 #include <simgear/props/props.hxx>
  30 #include <simgear/props/props_io.hxx>
  31 #include <simgear/scene/model/model.hxx>
  32 #include <simgear/scene/model/ModelRegistry.hxx>
  33 #include <simgear/misc/ResourceManager.hxx>
  34
  35 #include "SGPagedLOD.hxx"
  36 #include "SGReaderWriterXML.hxx"
  37 #include "SGReaderWriterXMLOptions.hxx"
  38
  39 #include "modellib.hxx"
  40
  41 #include <simgear/math/SGMath.hxx>
  42
  43 using std::string;
  44 using namespace simgear;
  45
  46 osgDB::RegisterReaderWriterProxy<SGReaderWriterXML> g_readerWriter_XML_Proxy;
  47 ModelRegistryCallbackProxy<LoadOnlyCallback> g_xmlCallbackProxy("xml");
  48
  49 \fSGPropertyNode_ptr SGModelLib::static_propRoot;
  50 SGModelLib::panel_func SGModelLib::static_panelFunc = NULL;
  51
  52 ////////////////////////////////////////////////////////////////////////
  53 // Implementation of SGModelLib.
  54 ////////////////////////////////////////////////////////////////////////
  55 void SGModelLib::init(const string &root_dir)
  56 {
  57     osgDB::Registry::instance()->getDataFilePathList().push_front(root_dir);
  58 }
  59
  60 void SGModelLib::setPropRoot(SGPropertyNode* root)
  61 {
  62   static_propRoot = root;
  63 }
  64
  65 void SGModelLib::setPanelFunc(panel_func pf)
  66 {
  67   static_panelFunc = pf;
  68 }
  69
  70 std::string SGModelLib::findDataFile(const std::string& file,
  71   const osgDB::ReaderWriter::Options* opts,
  72   SGPath currentPath)
  73 {
  74   SGPath p = ResourceManager::instance()->findPath(file, currentPath);
  75   if (p.exists()) {
  76     return p.str();
  77   }
  78
  79   // finally hand on to standard OSG behaviour
  80   return osgDB::findDataFile(file, opts);
  81 }
  82
  83 SGModelLib::SGModelLib()
  84 {
  85 }
  86
  87 SGModelLib::~SGModelLib()
  88 {
  89 }
  90
  91 namespace
  92 {
  93 osg::Node* loadFile(const string& path, SGReaderWriterXMLOptions* options)
  94 {
  95     using namespace osg;
  96     using namespace osgDB;
  97     if (boost::iends_with(path, ".ac"))
  98         options->setInstantiateEffects(true);
  99     ref_ptr<Node> model = readRefNodeFile(path, options);
 100     if (!model)
 101         return 0;
 102     else
 103      return model.release();
 104 }
 105 }
 106
 107 osg::Node*
 108 SGModelLib::loadModel(const string &path,
 109                        SGPropertyNode *prop_root,
 110                        SGModelData *data,
 111                        bool load2DPanels)
 112 {
 113     osg::ref_ptr<SGReaderWriterXMLOptions> opt = new SGReaderWriterXMLOptions(*(osgDB::Registry::instance()->getOptions()));
 114     opt->setPropRoot(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::loadPagedModel(const string &path, SGPropertyNode *prop_root,
 130                            SGModelData *data)
 131 {
 132     SGPagedLOD *plod = new SGPagedLOD;
 133     plod->setName("Paged LOD for \"" + path + "\"");
 134     plod->setFileName(0, path);
 135     plod->setRange(0, 0.0, 50.0*SG_NM_TO_METER);
 136
 137     osg::ref_ptr<SGReaderWriterXMLOptions> opt
 138         = new SGReaderWriterXMLOptions(*(osgDB::Registry::instance()
 139                                          ->getOptions()));
 140     opt->setPropRoot(prop_root ? prop_root: static_propRoot.get());
 141     opt->setModelData(data);
 142     opt->setLoadPanel(static_panelFunc);
 143     if (boost::iends_with(path, ".ac"))
 144         opt->setInstantiateEffects(true);
 145     plod->setReaderWriterOptions(opt.get());
 146     return plod;
 147 }
 148
 149 // end of modellib.cxx