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 #ifdef HAVE_CONFIG_H
  19 #  include <simgear_config.h>
  20 #endif
  21
  22 #include <osgDB/FileNameUtils>
  23 #include <osgDB/Registry>
  24
  25 #include <simgear/scene/model/ModelRegistry.hxx>
  26 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
  27 #include <simgear/math/SGMath.hxx>
  28
  29 #include "SGReaderWriterBTG.hxx"
  30 #include "obj.hxx"
  31
  32 using namespace simgear;
  33
  34 SGReaderWriterBTG::SGReaderWriterBTG()
  35 {
  36     supportsExtension("btg", "SimGear btg database format");
  37     // supportsExtension("btg.gz", "SimGear btg database format");
  38 }
  39
  40 SGReaderWriterBTG::~SGReaderWriterBTG()
  41 {
  42 }
  43
  44 const char* SGReaderWriterBTG::className() const
  45 {
  46     return "BTG Database reader";
  47 }
  48
  49 bool
  50 SGReaderWriterBTG::acceptsExtension(const std::string& extension) const
  51 {
  52     // trick the osg extensions match algorithm to accept btg.gz files.
  53     if (osgDB::convertToLowerCase(extension) == "gz")
  54         return true;
  55     return osgDB::ReaderWriter::acceptsExtension(extension);
  56 }
  57
  58 osgDB::ReaderWriter::ReadResult
  59 SGReaderWriterBTG::readNode(const std::string& fileName,
  60                             const osgDB::ReaderWriter::Options* options) const
  61 {
  62     SGMaterialLib* matlib = 0;
  63     bool useRandomObjects = false;
  64     bool useRandomVegetation = false;
  65     float vegetation_density = 1.0f;
  66     const SGReaderWriterOptions* sgOptions;
  67     sgOptions = dynamic_cast<const SGReaderWriterOptions*>(options);
  68     if (sgOptions) {
  69         matlib = sgOptions->getMaterialLib();
  70         SGPropertyNode* propertyNode = sgOptions->getPropertyNode().get();
  71         if (propertyNode) {
  72             useRandomObjects
  73                 = propertyNode->getBoolValue("/sim/rendering/random-objects",
  74                                              useRandomObjects);
  75             useRandomVegetation
  76                 = propertyNode->getBoolValue("/sim/rendering/random-vegetation",
  77                                              useRandomVegetation);
  78             vegetation_density
  79                 = propertyNode->getFloatValue("/sim/rendering/vegetation-density",
  80                                               vegetation_density);
  81         }
  82     }
  83
  84     osg::Node* result = SGLoadBTG(fileName, matlib,
  85                                   useRandomObjects,
  86                                   useRandomVegetation,
  87                                   vegetation_density);
  88     if (result)
  89         return result;
  90     else
  91         return ReadResult::FILE_NOT_HANDLED;
  92 }
  93
  94
  95 typedef ModelRegistryCallback<DefaultProcessPolicy, NoCachePolicy,
  96                               NoOptimizePolicy,
  97                               NoSubstitutePolicy, BuildGroupBVHPolicy>
  98 BTGCallback;
  99
 100 namespace
 101 {
 102 ModelRegistryCallbackProxy<BTGCallback> g_btgCallbackProxy("btg");
 103 }