simgear/scene/tgdb/SGReaderWriterBTG.cxx

   1 // Copyright (C) 2007 Tim Moore timoore@redhat.com
   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 #include <osgDB/FileNameUtils>
  19 #include <osgDB/Registry>
  20
  21 #include <simgear/scene/model/ModelRegistry.hxx>
  22
  23 #include "SGReaderWriterBTGOptions.hxx"
  24 #include "SGReaderWriterBTG.hxx"
  25 #include "obj.hxx"
  26
  27 using namespace simgear;
  28
  29 // SGReaderWriterBTGOptions static value here to avoid an additional,
  30 // tiny source file.
  31
  32 std::string SGReaderWriterBTGOptions::defaultOptions;
  33
  34 const char* SGReaderWriterBTG::className() const
  35 {
  36     return "BTG Database reader";
  37 }
  38
  39 bool SGReaderWriterBTG::acceptsExtension(const std::string& extension) const
  40 {
  41     return (osgDB::equalCaseInsensitive(extension, "gz")
  42             || osgDB::equalCaseInsensitive(extension, "btg"));
  43 }
  44
  45 osgDB::ReaderWriter::ReadResult
  46 SGReaderWriterBTG::readNode(const std::string& fileName,
  47                             const osgDB::ReaderWriter::Options* options) const
  48 {
  49     std::string ext = osgDB::getLowerCaseFileExtension(fileName);
  50     if(!acceptsExtension(ext))
  51         return ReadResult::FILE_NOT_HANDLED;
  52     if (osgDB::equalCaseInsensitive(ext, "gz")) {
  53         std::string btgFileName = osgDB::getNameLessExtension(fileName);
  54         if (!acceptsExtension(
  55                 osgDB::getLowerCaseFileExtension(btgFileName))) {
  56             return ReadResult::FILE_NOT_HANDLED;
  57         }
  58     }
  59     SGMaterialLib* matlib = 0;
  60     bool calcLights = false;
  61     bool useRandomObjects = false;
  62     bool useRandomVegetation = false;
  63     const SGReaderWriterBTGOptions* btgOptions
  64         = dynamic_cast<const SGReaderWriterBTGOptions*>(options);
  65     if (btgOptions) {
  66         matlib = btgOptions->getMatlib();
  67         calcLights = btgOptions->getCalcLights();
  68         useRandomObjects = btgOptions->getUseRandomObjects();
  69         useRandomVegetation = btgOptions->getUseRandomVegetation();
  70     }
  71     osg::Node* result = SGLoadBTG(fileName, matlib, calcLights,
  72                                   useRandomObjects,
  73                                   useRandomVegetation);
  74     if (result)
  75         return result;
  76     else
  77         return ReadResult::FILE_NOT_HANDLED;
  78 }
  79
  80
  81 typedef ModelRegistryCallback<DefaultProcessPolicy, NoCachePolicy,
  82                               NoOptimizePolicy, NoCopyPolicy,
  83                               NoSubstitutePolicy, BuildGroupBVHPolicy>
  84 BTGCallback;
  85
  86 namespace
  87 {
  88 ModelRegistryCallbackProxy<BTGCallback> g_btgCallbackProxy("btg");
  89 }