decimaterviewer.cc

/* ========================================================================= *
 *                                                                           *
 *                               OpenMesh                                    *
 *           Copyright (c) 2001-2025, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
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 * This file is part of OpenMesh.                                            *
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 * ========================================================================= */
 
 
 
#ifdef _MSC_VER
#  pragma warning(disable: 4267 4311)
#endif
 
#include <iostream>
#include <fstream>
#include <OpenMesh/Tools/Utils/getopt.h>
#include <qapplication.h>
#include <qmessagebox.h>
#include <QOpenGLContext>
 
#include "DecimaterViewerWidget.hh"
 
void usage_and_exit(int xcode);
 
 
int main(int argc, char **argv)
{
#if defined(OM_USE_OSG) && OM_USE_OSG
  osg::osgInit(argc, argv);
#endif
  
  // OpenGL check
  QApplication app(argc,argv);
 
#if QT_VERSION_MAJOR < 6
  if ( !QGLFormat::hasOpenGL() ) {
#else
  if ( QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL ) {
#endif
    QString msg = "System has no OpenGL support!";
    QMessageBox::critical( nullptr, "OpenGL", msg + argv[1] );
    return -1;
  }
 
 
  int c;
  OpenMesh::IO::Options opt;
  
  while ( (c=getopt(argc,argv,"s"))!=-1 )
  {
     switch(c)
     {
       case 's': opt += OpenMesh::IO::Options::Swap; break;
       case 'h':
          usage_and_exit(0);
          break;
       default:
          usage_and_exit(1);
     }
  }
  // create widget
  DecimaterViewerWidget w(0);  
//  app.setMainWidget(&w);
 
  w.resize(400, 400);
  w.show(); 
 
  // load scene
  if ( optind < argc )  
  {
     if ( ! w.open_mesh(argv[optind], opt) )
     {
        QString msg = "Cannot read mesh from file:\n '";
        msg += argv[optind];
        msg += "'";
        QMessageBox::critical( nullptr, w.windowTitle(), msg );
        return 1;
     }
  }
 
  if ( ++optind < argc )
  {
     if ( ! w.open_texture( argv[optind] ) )
     {
         QString msg = "Cannot load texture image from file:\n '";
        msg += argv[optind];
        msg += "'\n\nPossible reasons:\n";
        msg += "- Mesh file didn't provide texture coordinates\n";
        msg += "- Texture file does not exist\n";
        msg += "- Texture file is not accessible.\n";
        QMessageBox::warning( nullptr, w.windowTitle(), msg );
     }
  }
 
  return app.exec();
}
 
void usage_and_exit(int xcode)
{
   std::cout << "Usage: DecimaterGui [-s] [mesh] [texture]\n" << std::endl;
   std::cout << "Options:\n"
             << "  -s\n"
             << "    Reverse byte order, when reading binary files.\n"
             << "    Press 'h' when the application is running for more options.\n"
             << std::endl;
   exit(xcode);
}