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/* OpenSceneGraph example, osgsimplifier.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgUtil/Optimizer>
#include <osgUtil/Simplifier>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/TrackballManipulator>
#include <osgGA/StateSetManipulator>
#include <iostream>
class KeyboardEventHandler : public osgGA::GUIEventHandler
{
public:
KeyboardEventHandler(unsigned int& flag, const std::string& filename) :
_flag(flag),
_outputFilename(filename)
{}
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='n')
{
_flag = 1;
return true;
}
if (ea.getKey()=='p')
{
_flag = 2;
return true;
}
if (ea.getKey()=='o')
{
osgViewer::View* view = dynamic_cast<osgViewer::Viewer*>(aa.asView());
osg::Node* sceneData = view ? view->getSceneData() : 0;
if (sceneData)
{
OSG_NOTICE<<"Witten model to file: "<<_outputFilename<<std::endl;
osgDB::writeNodeFile(*sceneData, _outputFilename);
}
return true;
}
break;
}
default:
break;
}
return false;
}
private:
unsigned int& _flag;
std::string _outputFilename;
};
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// set up the usage document, in case we need to print out how to use this program.
arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" examples illustrates simplification of triangle meshes.");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
arguments.getApplicationUsage()->addCommandLineOption("--ratio <ratio>","Specify the sample ratio","0.5]");
arguments.getApplicationUsage()->addCommandLineOption("--max-error <error>","Specify the maximum error","4.0");
std::string outputFilename="model.osgt";
float sampleRatio = 0.5f;
float maxError = 4.0f;
// construct the viewer.
osgViewer::Viewer viewer;
// read the sample ratio if one is supplied
while (arguments.read("--ratio",sampleRatio)) {}
while (arguments.read("--max-error",maxError)) {}
while (arguments.read("-o",outputFilename)) {}
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
{
arguments.getApplicationUsage()->write(std::cout);
return 1;
}
if (arguments.argc()<=1)
{
arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
return 1;
}
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
// if not loaded assume no arguments passed in, try use default mode instead.
if (!loadedModel) loadedModel = osgDB::readRefNodeFile("dumptruck.osgt");
// if no model has been successfully loaded report failure.
if (!loadedModel)
{
std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
return 1;
}
//loadedModel->accept(simplifier);
unsigned int keyFlag = 0;
viewer.addEventHandler(new KeyboardEventHandler(keyFlag, outputFilename));
// add the state manipulator
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
// add the window size toggle handler
viewer.addEventHandler(new osgViewer::WindowSizeHandler);
// add the stats handler
viewer.addEventHandler(new osgViewer::StatsHandler);
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
// set the scene to render
viewer.setSceneData(loadedModel.get());
// create the windows and run the threads.
viewer.realize();
float multiplier = 0.8f;
float minRatio = 0.001f;
float ratio = sampleRatio;
while( !viewer.done() )
{
// fire off the cull and draw traversals of the scene.
viewer.frame();
if (keyFlag == 1 || keyFlag == 2)
{
if (keyFlag == 1) ratio *= multiplier;
if (keyFlag == 2) ratio /= multiplier;
if (ratio<minRatio) ratio=minRatio;
osgUtil::Simplifier simplifier(ratio, maxError);
std::cout<<"Running osgUtil::Simplifier with SampleRatio="<<ratio<<" maxError="<<maxError<<" ...";
std::cout.flush();
osg::ref_ptr<osg::Node> root = (osg::Node*)loadedModel->clone(osg::CopyOp::DEEP_COPY_ALL);
root->accept(simplifier);
std::cout<<"done"<<std::endl;
viewer.setSceneData(root.get());
keyFlag = 0;
}
}
return 0;
}
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