开源项目之飞行模拟游戏 GL-117

GL-117 一款飞行模拟游戏,环境上和效果上都是以真实的场景作参考!可以选择战斗机和武器。常见的任务地形是山谷和沙漠。

目标是破坏敌军设施如油库，基地，飞机等等。任务中会受到反飞机武器如对空导弹，对空战车的攻击，也少不了空战。

项目需要3D库：SDL.dll、SDL_mixer.dll，效果如图：

入口源码：

/****************************************************************************
  GL-117 ENTRY POINT
****************************************************************************/

int main (int argc, char **argv)
{
  char buf [STDSIZE]; // temp buffer

  checkargs (argc, argv); // process command line parameters

  dirs = new Dirs (argv [0]); // get data directory (DATADIR, defined via autoconf)


  sprintf (buf, "Startup %s, %s ... ", argv [0], VERSIONSTRING);
  display (buf, LOG_MOST);

#ifdef _MSC_VER
  display ("Windows detected ", LOG_MOST);
#endif

  display ("Getting directory locations", LOG_ALL);
  
  if (!load_config ()) // try to load conf file (conf.cpp) and validate settings
  {
    // no conf file found => create new one
    display ("Creating new configuration", LOG_ALL);
    config_test (argc, argv); // do screen test
    firststart = true; // enable adjusting quality/view/graphics automatically by the game
  }

  save_config (); // save conf file (validated)

  load_configInterface (); // load interface settings from conf.interface and validate
  save_configInterface (); // save interface settings

  maploader = new MapLoader ();

// here srand should be called to initialize the random number generator
// this is currently done by grabbing random numbers via the init methods (not very elegant)

  server = NULL;
  client = NULL;

  display ("Creating/Loading pilots list", LOG_ALL);
  pilots = new PilotList (dirs->getSaves ("pilots")); // look at pilots.h

// NO SDL FOUND => USE GLUT ONLY
#ifdef USE_GLUT

  display ("Using GLUT only", LOG_MOST);
  if (!configinit)
  {
    glutInit (&argc, argv);
    glutInitDisplayMode (GLUT_DEPTH | GLUT_RGB | GLUT_DOUBLE);
    if (!setScreen (width, height, bpp, fullscreen))
    {
      load_saveconfig ();
      if (!setScreen (width, height, bpp, fullscreen))
      {
        sprintf (buf, "No working display mode %dx%d found", width, height);
        display (buf, LOG_FATAL);
        exit (EXIT_INIT);
      }
    }
  }

  display ("Calling main initialization method", LOG_ALL);
  myFirstInit ();

  display ("Creating dummy sound system, install SDL to enable sound", LOG_ALL);
  sound = new SoundSystem ();

  createMenu ();

  display ("Registering GLUT callbacks", LOG_ALL);
  glutReshapeFunc (myReshapeFunc);
  glutDisplayFunc (myDisplayFunc);
  glutKeyboardFunc (myKeyboardFunc);
  glutSpecialFunc (mySpecialFunc);
  glutPassiveMotionFunc (myPassiveMotionFunc);
  glutMouseFunc (myMouseFunc);
  glutIdleFunc (myIdleFunc);
  glutTimerFunc (20, myTimerFunc, 0);

  // parameters: visible angle, aspectracio, z-nearclip, z-farclip
  gluPerspective (visibleangle, (float) width / height, nearclippingplane * GLOBALSCALE, 50.0 * GLOBALSCALE);
  
  // no keyboard available with GLUT, as there are no KEY_DOWN/UP events
  if (controls <= 0)
    controls = CONTROLS_MOUSE;

  display ("Entering GLUT main loop", LOG_ALL);
  glutMainLoop(); // give controls to GLUT

// SDL FOUND
#else

  display ("Using SDL and GLUT", LOG_MOST);
  if (!configinit)
    if (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK) < 0)
    {
      sprintf (buf, "Couldn't initialize SDL: %s", SDL_GetError ());
      display (buf, LOG_FATAL);
      exit (EXIT_INIT);
    }
  atexit (SDL_Quit);

// SDL_NET INSTALLED?
#ifdef HAVE_SDL_NET
  if (SDLNet_Init () == -1) // initialize SDL_net
  {
    sprintf (buf, "SDLNet_Init: %s", SDLNet_GetError ());
    display (buf, LOG_FATAL);
    exit (EXIT_INIT);
  }
  display ("Using SDL_net", LOG_MOST);
#endif

  if (!configinit)
  {
    if (!setScreen (width, height, bpp, fullscreen))
    {
      load_saveconfig ();
      if (!setScreen (width, height, bpp, fullscreen))
      {
        sprintf (buf, "No working display mode %dx%d found.", width, height);
        display (buf, LOG_FATAL);
        exit (EXIT_INIT);
      }
    }
  }

  display ("Setting SDL caption", LOG_ALL);
  SDL_WM_SetCaption ("GL-117", "GL-117"); // window name

  SDL_ShowCursor (0);

  display ("Creating sound system", LOG_ALL);
  sound = new SoundSystem (); // look at audio.cpp
  sound->volumesound = volumesound;
  sound->volumemusic = volumemusic;
  sound->setVolume (); // set all sound volumes
  sound->setVolumeMusic (); // set all music volumes

  display ("Playing startup music", LOG_ALL);
  sound->playMusic (1);
#ifdef HAVE_SDL_MIXER
  Mix_HookMusicFinished (playRandomMusic);
#endif

  display ("Calling main initialization method", LOG_ALL);
  myFirstInit ();
  myReshapeFunc (width, height);

  display ("Querying joystick", LOG_ALL);
  joysticks = SDL_NumJoysticks ();
  memset (jaxis, 0, maxjaxis * maxjoysticks * sizeof (int));
  if (joysticks > 0)
  {
    for (i = 0; i < joysticks; i ++)
    {
      SDL_JoystickEventState (SDL_ENABLE);
      sdljoystick [i] = SDL_JoystickOpen (i);
      sdljoystickaxes [i] = SDL_JoystickNumAxes (sdljoystick [i]);
      sprintf (buf, "Joystick \"%s\" detected", SDL_JoystickName (i));
      display (buf, LOG_MOST);
    }
  }
  else
  {
    display ("No joystick found", LOG_MOST);
//    sdljoystick [0] = NULL;
    if (controls == CONTROLS_JOYSTICK) // no joystick available, so switch to mouse controls
      controls = CONTROLS_MOUSE;
  }

// disable joystick manually
//  joysticks = 0;

/*  joysticks = 2;
  sdljoystickaxes [0] = 4;
  sdljoystickaxes [1] = 2;*/

  SDL_EnableUNICODE (1);
  SDL_EnableKeyRepeat (SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);

// Restrict mouse to SDL window
//  SDL_WM_GrabInput (SDL_GRAB_ON);

  createMenu ();

  display ("Entering SDL main loop (GLUT emulation)", LOG_ALL);
  sdlMainLoop (); // simulate GLUT's main loop (above)

#endif
  
  return 0; // exit without signaling errors
}

学习的目标是成熟！~~~~~