meshviewer.cc

/* ========================================================================= *
 *                                                                           *
 *                               OpenMesh                                    *
 *           Copyright (c) 2001-2025, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openmesh.org                               *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenMesh.                                            *
 *---------------------------------------------------------------------------*
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 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
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 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
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 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
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 *                                                                           *
 * ========================================================================= */
 
#ifdef _MSC_VER
#  pragma warning(disable: 4267 4311)
#endif
 
#include <iostream>
 
#include <fstream>
#include <QApplication>
#include <QMessageBox>
#include <QMainWindow>
#include <QMenuBar>
#include <QFileDialog>
#if QT_VERSION_MAJOR > 5
#include <QOpenGLContext>
#endif
 
#include "MeshViewerWidget.hh"
 
 
void create_menu(QMainWindow &w);
void usage_and_exit(int xcode);
 
int main(int argc, char **argv)
{
  // 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, QString("OpenGL"), msg + QString(argv[1]) );
    return -1;
  }
 
  int c;
  OpenMesh::IO::Options opt;
 
  while ( (c=getopt(argc,argv,"hbs"))!=-1 )
  {
     switch(c)
     {
       case 'b': opt += OpenMesh::IO::Options::Binary; break;
       case 'h':
          usage_and_exit(0);
          break;
       case 's': opt += OpenMesh::IO::Options::Swap; break;
       default:
          usage_and_exit(1);
     }
  }
 
  // enable most options for now
  opt += OpenMesh::IO::Options::VertexColor;
  opt += OpenMesh::IO::Options::VertexNormal;
  opt += OpenMesh::IO::Options::VertexTexCoord;
  opt += OpenMesh::IO::Options::FaceColor;
  opt += OpenMesh::IO::Options::FaceNormal;
  opt += OpenMesh::IO::Options::FaceTexCoord;
 
  // create widget
  QMainWindow mainWin;
  MeshViewerWidget w(&mainWin);
  w.setOptions(opt);
  mainWin.setCentralWidget(&w);
 
  create_menu(mainWin);
 
  // static mesh, hence use strips
  w.enable_strips();
 
  mainWin.resize(640, 480);
  mainWin.show();
 
  // load scene if specified on the command line
  if ( optind < argc )
  {
    w.open_mesh_gui(argv[optind]);
  }
 
  if ( ++optind < argc )
  {
      w.open_texture_gui(argv[optind]);
  }
 
  return app.exec();
}
 
void create_menu(QMainWindow &w)
{
    using namespace Qt;
    QMenu *fileMenu = w.menuBar()->addMenu(w.tr("&File"));
 
    QAction* openAct = new QAction(w.tr("&Open mesh..."), &w);
    openAct->setShortcut(w.tr("Ctrl+O"));
    openAct->setStatusTip(w.tr("Open a mesh file"));
    QObject::connect(openAct, SIGNAL(triggered()), w.centralWidget(), SLOT(query_open_mesh_file()));
    fileMenu->addAction(openAct);
 
    QAction* texAct = new QAction(w.tr("Open &texture..."), &w);
    texAct->setShortcut(w.tr("Ctrl+T"));
    texAct->setStatusTip(w.tr("Open a texture file"));
    QObject::connect(texAct, SIGNAL(triggered()), w.centralWidget(), SLOT(query_open_texture_file()));
    fileMenu->addAction(texAct);
}
 
void usage_and_exit(int xcode)
{
   std::cout << "Usage: meshviewer [-s] [mesh] [texture]\n" << std::endl;
   std::cout << "Options:\n"
             << "  -b\n"
             << "    Assume input to be binary.\n\n"
             << "  -s\n"
             << "    Reverse byte order, when reading binary files.\n"
             << std::endl;
   exit(xcode);
}