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
  34 #include "SGPagedLOD.hxx"
  35 #include "SGReaderWriterXML.hxx"
  36 #include "SGReaderWriterXMLOptions.hxx"
  37
  38 #include "modellib.hxx"
  39
  40 #include <simgear/math/SGMath.hxx>
  41
  42 using std::string;
  43 using namespace simgear;
  44
  45 osgDB::RegisterReaderWriterProxy<SGReaderWriterXML> g_readerWriter_XML_Proxy;
  46 ModelRegistryCallbackProxy<LoadOnlyCallback> g_xmlCallbackProxy("xml");
  47
  48 \fSGPropertyNode_ptr SGModelLib::static_propRoot;
  49 SGModelLib::panel_func SGModelLib::static_panelFunc = NULL;
  50 SGModelLib::resolve_func SGModelLib::static_resolver = 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 void SGModelLib::setResolveFunc(resolve_func rf)
  71 {
  72   static_resolver = rf;
  73 }
  74
  75 std::string SGModelLib::findDataFile(const std::string& file,
  76   const osgDB::ReaderWriter::Options* opts)
  77 {
  78   if (static_resolver) {
  79     SGPath p = static_resolver(file);
  80     if (p.exists()) {
  81       return p.str();
  82     }
  83   }
  84
  85   return osgDB::findDataFile(file, opts);
  86 }
  87
  88 SGModelLib::SGModelLib()
  89 {
  90 }
  91
  92 SGModelLib::~SGModelLib()
  93 {
  94 }
  95
  96 namespace
  97 {
  98 osg::Node* loadFile(const string& path, SGReaderWriterXMLOptions* options)
  99 {
 100     using namespace osg;
 101     using namespace osgDB;
 102     if (boost::iends_with(path, ".ac"))
 103         options->setInstantiateEffects(true);
 104     ref_ptr<Node> model = readRefNodeFile(path, options);
 105     if (!model)
 106         return 0;
 107     else
 108      return model.release();
 109 }
 110 }
 111
 112 osg::Node*
 113 SGModelLib::loadModel(const string &path,
 114                        SGPropertyNode *prop_root,
 115                        SGModelData *data)
 116 {
 117     osg::ref_ptr<SGReaderWriterXMLOptions> opt = new SGReaderWriterXMLOptions(*(osgDB::Registry::instance()->getOptions()));
 118     opt->setPropRoot(prop_root ? prop_root: static_propRoot.get());
 119     opt->setModelData(data);
 120     opt->setLoadPanel(static_panelFunc);
 121
 122     osg::Node *n = loadFile(path, opt.get());
 123     if (n && n->getName().empty())
 124         n->setName("Direct loaded model \"" + path + "\"");
 125     return n;
 126
 127 }
 128
 129 osg::Node*
 130 SGModelLib::loadPagedModel(const string &path, SGPropertyNode *prop_root,
 131                            SGModelData *data)
 132 {
 133     SGPagedLOD *plod = new SGPagedLOD;
 134     plod->setName("Paged LOD for \"" + path + "\"");
 135     plod->setFileName(0, path);
 136     plod->setRange(0, 0.0, 50.0*SG_NM_TO_METER);
 137
 138     osg::ref_ptr<SGReaderWriterXMLOptions> opt
 139         = new SGReaderWriterXMLOptions(*(osgDB::Registry::instance()
 140                                          ->getOptions()));
 141     opt->setPropRoot(prop_root ? prop_root: static_propRoot.get());
 142     opt->setModelData(data);
 143     opt->setLoadPanel(static_panelFunc);
 144     if (boost::iends_with(path, ".ac"))
 145         opt->setInstantiateEffects(true);
 146     plod->setReaderWriterOptions(opt.get());
 147     return plod;
 148 }
 149
 150 // end of modellib.cxx