Moved present3D from own repository into core OSG.
This commit is contained in:
Robert Osfield
279
applications/present3D/ReadShowFile.cpp
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279
applications/present3D/ReadShowFile.cpp
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/* -*-c++-*- Present3D - Copyright (C) 1999-2006 Robert Osfield
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*
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* This software is open source and may be redistributed and/or modified under
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* the terms of the GNU General Public License (GPL) version 2.0.
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* The full license is in LICENSE.txt file included with this distribution,.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* include LICENSE.txt for more details.
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*/
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#include "ReadShowFile.h"
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#include "ShowEventHandler.h"
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#include <osg/ImageStream>
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#include <osg/Shape>
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#include <osg/ShapeDrawable>
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#include <osg/Switch>
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#include <osgDB/ReadFile>
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#include <osgDB/FileNameUtils>
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#include <osgDB/FileUtils>
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#include <osgVolume/VolumeTile>
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#include <libxml/xmlmemory.h>
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#include <libxml/parser.h>
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#include <string.h>
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class AddVolumeEditingCallbackVisitor : public osg::NodeVisitor
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{
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public:
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AddVolumeEditingCallbackVisitor():
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
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void apply(osg::Group& group)
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{
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osgVolume::VolumeTile* volumeTile = dynamic_cast<osgVolume::VolumeTile*>(&group);
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if (volumeTile)
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{
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volumeTile->addEventCallback(new osgVolume::PropertyAdjustmentCallback());
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}
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else
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{
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traverse(group);
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}
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}
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};
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bool p3d::getFileNames(osg::ArgumentParser& arguments, FileNameList& xmlFiles, FileNameList& normalFiles)
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{
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// note currently doesn't delete the loaded file entries from the command line yet...
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for(int pos=1;pos<arguments.argc();++pos)
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{
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if (!arguments.isOption(pos))
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{
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std::string ext = osgDB::getFileExtension(arguments[pos]);
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if (osgDB::equalCaseInsensitive(ext,"xml") || osgDB::equalCaseInsensitive(ext,"p3d"))
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{
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xmlFiles.push_back(arguments[pos]);
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}
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else
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{
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normalFiles.push_back(arguments[pos]);
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}
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}
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}
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return (!xmlFiles.empty() || !normalFiles.empty());
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}
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bool p3d::readEnvVars(osg::ArgumentParser& arguments)
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{
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bool readVars = false;
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for(unsigned int i=1; i<arguments.argc(); ++i)
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{
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if (!arguments.isOption(i))
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{
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std::string ext = osgDB::getLowerCaseFileExtension(arguments[i]);
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if (ext=="xml" || ext=="p3d")
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{
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std::string file = osgDB::findDataFile(arguments[i]);
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if (!file.empty())
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{
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std::string path = osgDB::getFilePath(file);
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if (!path.empty())
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{
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osgDB::getDataFilePathList().push_front(path);
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}
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if (p3d::readEnvVars(file)) readVars = true;
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}
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}
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}
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}
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return readVars;
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}
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bool p3d::readEnvVars(const std::string& fileName)
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{
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std::string ext = osgDB::getFileExtension(fileName);
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if (!osgDB::equalCaseInsensitive(ext,"xml") &&
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!osgDB::equalCaseInsensitive(ext,"p3d")) return false;
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xmlDocPtr doc;
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xmlNodePtr cur;
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doc = xmlParseFile(fileName.c_str());
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if (doc == NULL )
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{
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fprintf(stderr,"Document not parsed successfully. \n");
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return false;
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}
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cur = xmlDocGetRootElement(doc);
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if (cur == NULL)
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{
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fprintf(stderr,"empty document\n");
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xmlFreeDoc(doc);
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return false;
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}
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if (xmlStrcmp(cur->name, (const xmlChar *) "presentation"))
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{
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fprintf(stderr,"document of the wrong type, root node != presentation");
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xmlFreeDoc(doc);
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return false;
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}
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bool readVars = false;
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xmlChar *key;
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cur = cur->xmlChildrenNode;
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while (cur != NULL) {
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if ((!xmlStrcmp(cur->name, (const xmlChar *)"env")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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if (key)
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{
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char* str = strdup((char*)key);
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osg::notify(osg::INFO)<<"putenv("<<str<<")"<<std::endl;
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putenv(str);
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readVars = true;
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}
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xmlFree(key);
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}
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cur = cur->next;
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}
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#ifndef __APPLE__
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xmlFreeDoc(doc);
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#endif
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return readVars;
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}
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osg::Node* p3d::readHoldingSlide(const std::string& filename)
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{
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std::string ext = osgDB::getFileExtension(filename);
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if (!osgDB::equalCaseInsensitive(ext,"xml") &&
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!osgDB::equalCaseInsensitive(ext,"p3d")) return 0;
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osg::ref_ptr<osgDB::ReaderWriter::Options> options = new osgDB::ReaderWriter::Options;
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options->setObjectCacheHint(osgDB::ReaderWriter::Options::CACHE_NONE);
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options->setOptionString("holding_slide");
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osgDB::ReaderWriter::ReadResult readResult = osgDB::Registry::instance()->readNode(filename, options.get());
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if (readResult.validNode()) return readResult.takeNode();
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else return 0;
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}
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osg::Node* p3d::readPresentation(const std::string& filename,const osgDB::ReaderWriter::Options* options)
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{
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std::string ext = osgDB::getFileExtension(filename);
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if (!osgDB::equalCaseInsensitive(ext,"xml") &&
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!osgDB::equalCaseInsensitive(ext,"p3d")) return 0;
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return osgDB::readNodeFile(filename, options);
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}
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osg::Node* p3d::readShowFiles(osg::ArgumentParser& arguments,const osgDB::ReaderWriter::Options* options)
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{
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typedef std::vector< osg::ref_ptr<osg::Node> > NodeList;
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NodeList nodeList;
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std::string filename;
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while (arguments.read("--image",filename))
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{
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osg::ref_ptr<osg::Image> image = readImageFile(filename.c_str(), options);
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if (image.valid()) nodeList.push_back(osg::createGeodeForImage(image.get()));
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}
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while (arguments.read("--movie",filename))
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{
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osg::ref_ptr<osg::Image> image = readImageFile(filename.c_str(), options);
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osg::ref_ptr<osg::ImageStream> imageStream = dynamic_cast<osg::ImageStream*>(image.get());
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if (image.valid())
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{
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imageStream->play();
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nodeList.push_back(osg::createGeodeForImage(imageStream.get()));
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}
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}
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while (arguments.read("--dem",filename))
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{
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osg::HeightField* hf = readHeightFieldFile(filename.c_str(), options);
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if (hf)
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{
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(new osg::ShapeDrawable(hf));
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nodeList.push_back(geode);
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}
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}
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// note currently doesn't delete the loaded file entries from the command line yet...
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for(int pos=1;pos<arguments.argc();++pos)
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{
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if (!arguments.isOption(pos))
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{
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// not an option so assume string is a filename.
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osg::Node *node = osgDB::readNodeFile( arguments[pos], options);
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if(node)
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{
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if (node->getName().empty()) node->setName( arguments[pos] );
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nodeList.push_back(node);
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}
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}
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}
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if (nodeList.empty())
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{
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return NULL;
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}
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osg::ref_ptr<osg::Node> root;
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if (nodeList.size()==1)
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{
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root = nodeList.front().get();
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}
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else // size >1
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{
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osg::Switch* sw = new osg::Switch;
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for(NodeList::iterator itr=nodeList.begin();
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itr!=nodeList.end();
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++itr)
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{
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sw->addChild((*itr).get());
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}
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sw->setSingleChildOn(0);
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sw->setEventCallback(new p3d::ShowEventHandler());
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root = sw;
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}
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if (root.valid())
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{
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osg::notify(osg::INFO)<<"Got node now adding callback"<<std::endl;
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AddVolumeEditingCallbackVisitor avecv;
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root->accept(avecv);
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}
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return root.release();
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}
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