Bonsoir,
j'édudie le code source de flightgear 2.0
je n'arrive pas à bien comprendre les classe sans déclaration,
est ce que cela sert à créer une sorte "alias".
voici le code source :
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342 // globals.hxx -- Global state that needs to be shared among the sim modules // // Written by Curtis Olson, started July 2000. // // Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as // published by the Free Software Foundation; either version 2 of the // License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // $Id$ #ifndef _GLOBALS_HXX #define _GLOBALS_HXX #include <simgear/compiler.h> #include <simgear/props/props.hxx> #include <simgear/structure/subsystem_mgr.hxx> #include <vector> #include <string> typedef std::vector<std::string> string_list; // Forward declarations // This file is included, directly or indirectly, almost everywhere in // FlightGear, so if any of its dependencies changes, most of the sim // has to be recompiled. Using these forward declarations helps us to // avoid including a lot of header files (and thus, a lot of // dependencies). Since Most of the methods simply set or return // pointers, we don't need to know anything about the class details // anyway. class SGEphemeris; class SGCommandMgr; class SGMagVar; class SGMaterialLib; class SGPropertyNode; class SGTime; class SGEventMgr; class SGSubsystemMgr; class SGSubsystem; class SGSoundMgr; class FGAIMgr; class FGATCMgr; class FGAircraftModel; class FGControls; class FGFlightPlanDispatcher; class FGNavList; class FGAirwayNetwork; class FGTACANList; class FGLight; class FGModelMgr; class FGRouteMgr; class FGScenery; class FGMultiplayMgr; class FGPanel; class FGTileMgr; class FGViewMgr; class FGViewer; class FGRenderer; class FGFontCache; /** * Bucket for subsystem pointers representing the sim's state. */ class FGGlobals { private: // properties, destroy last SGPropertyNode_ptr props; SGPropertyNode_ptr initial_state; // localization SGPropertyNode_ptr locale; FGRenderer *renderer; SGSubsystemMgr *subsystem_mgr; SGEventMgr *event_mgr; SGSoundMgr *soundmgr; // Number of milliseconds elapsed since the start of the program. double sim_time_sec; // Root of FlightGear data tree std::string fg_root; // Roots of FlightGear scenery tree string_list fg_scenery; std::string browser; // An offset in seconds from the true time. Allows us to adjust // the effective time of day. long int warp; // How much to change the value of warp each iteration. Allows us // to make time progress faster than normal (or even run in reverse.) long int warp_delta; // Time structure SGTime *time_params; // Sky structures SGEphemeris *ephem; // Magnetic Variation SGMagVar *mag; // Material properties library SGMaterialLib *matlib; // Global autopilot "route" FGRouteMgr *route_mgr; // 2D panel FGPanel *current_panel; // ATC manager FGATCMgr *ATC_mgr; // AI manager FGAIMgr *AI_mgr; // control input state FGControls *controls; // viewer manager FGViewMgr *viewmgr; SGCommandMgr *commands; //FGFlightPlanDispatcher *fpDispatcher; FGAircraftModel *acmodel; FGModelMgr * model_mgr; // list of serial port-like configurations string_list *channel_options_list; // A list of initial waypoints that are read from the command line // and or flight-plan file during initialization string_list *initial_waypoints; // FlightGear scenery manager FGScenery *scenery; // Tile manager FGTileMgr *tile_mgr; FGFontCache *fontcache; // Navigational Aids FGNavList *navlist; FGNavList *loclist; FGNavList *gslist; FGNavList *dmelist; FGNavList *tacanlist; FGNavList *carrierlist; FGTACANList *channellist; FGAirwayNetwork *airwaynet; //Mulitplayer managers FGMultiplayMgr *multiplayer_mgr; public: FGGlobals(); virtual ~FGGlobals(); virtual FGRenderer *get_renderer () const; virtual SGSubsystemMgr *get_subsystem_mgr () const; virtual SGSubsystem *get_subsystem (const char * name); virtual void add_subsystem (const char * name, SGSubsystem * subsystem, SGSubsystemMgr::GroupType type = SGSubsystemMgr::GENERAL, double min_time_sec = 0); virtual SGEventMgr *get_event_mgr () const; virtual SGSoundMgr *get_soundmgr () const; inline double get_sim_time_sec () const { return sim_time_sec; } inline void inc_sim_time_sec (double dt) { sim_time_sec += dt; } inline void set_sim_time_sec (double t) { sim_time_sec = t; } inline const std::string &get_fg_root () const { return fg_root; } void set_fg_root (const std::string &root); inline const string_list &get_fg_scenery () const { return fg_scenery; } void set_fg_scenery (const std::string &scenery); inline const std::string &get_browser () const { return browser; } void set_browser (const std::string &b) { browser = b; } inline long int get_warp() const { return warp; } inline void set_warp( long int w ) { warp = w; } inline void inc_warp( long int w ) { warp += w; } inline long int get_warp_delta() const { return warp_delta; } inline void set_warp_delta( long int d ) { warp_delta = d; } inline void inc_warp_delta( long int d ) { warp_delta += d; } inline SGTime *get_time_params() const { return time_params; } inline void set_time_params( SGTime *t ) { time_params = t; } inline SGEphemeris *get_ephem() const { return ephem; } inline void set_ephem( SGEphemeris *e ) { ephem = e; } inline SGMagVar *get_mag() const { return mag; } inline void set_mag( SGMagVar *m ) { mag = m; } inline SGMaterialLib *get_matlib() const { return matlib; } inline void set_matlib( SGMaterialLib *m ) { matlib = m; } inline FGATCMgr *get_ATC_mgr() const { return ATC_mgr; } inline void set_ATC_mgr( FGATCMgr *a ) {ATC_mgr = a; } inline FGAIMgr *get_AI_mgr() const { return AI_mgr; } inline void set_AI_mgr( FGAIMgr *a ) {AI_mgr = a; } inline FGPanel *get_current_panel() const { return current_panel; } inline void set_current_panel( FGPanel *cp ) { current_panel = cp; } inline FGControls *get_controls() const { return controls; } inline void set_controls( FGControls *c ) { controls = c; } inline FGViewMgr *get_viewmgr() const { return viewmgr; } inline void set_viewmgr( FGViewMgr *vm ) { viewmgr = vm; } FGViewer *get_current_view() const; inline SGPropertyNode *get_props () { return props; } inline void set_props( SGPropertyNode *n ) { props = n; } inline SGPropertyNode *get_locale () { return locale; } inline void set_locale( SGPropertyNode *n ) { locale = n; } inline SGCommandMgr *get_commands () { return commands; } inline FGAircraftModel *get_aircraft_model () { return acmodel; } inline void set_aircraft_model (FGAircraftModel * model) { acmodel = model; } inline FGModelMgr *get_model_mgr () { return model_mgr; } inline void set_model_mgr (FGModelMgr * mgr) { model_mgr = mgr; } inline FGMultiplayMgr *get_multiplayer_mgr () { return multiplayer_mgr; } inline void set_multiplayer_mgr (FGMultiplayMgr * mgr) { multiplayer_mgr = mgr; } inline string_list *get_channel_options_list () { return channel_options_list; } inline void set_channel_options_list( string_list *l ) { channel_options_list = l; } inline string_list *get_initial_waypoints () { return initial_waypoints; } inline void set_initial_waypoints (string_list *list) { initial_waypoints = list; } inline FGScenery * get_scenery () const { return scenery; } inline void set_scenery ( FGScenery *s ) { scenery = s; } inline FGTileMgr * get_tile_mgr () const { return tile_mgr; } inline void set_tile_mgr ( FGTileMgr *t ) { tile_mgr = t; } inline FGFontCache *get_fontcache() const { return fontcache; } inline FGNavList *get_navlist() const { return navlist; } inline void set_navlist( FGNavList *n ) { navlist = n; } inline FGNavList *get_loclist() const { return loclist; } inline void set_loclist( FGNavList *n ) { loclist = n; } inline FGNavList *get_gslist() const { return gslist; } inline void set_gslist( FGNavList *n ) { gslist = n; } inline FGNavList *get_dmelist() const { return dmelist; } inline void set_dmelist( FGNavList *n ) { dmelist = n; } inline FGNavList *get_tacanlist() const { return tacanlist; } inline void set_tacanlist( FGNavList *n ) { tacanlist = n; } inline FGNavList *get_carrierlist() const { return carrierlist; } inline void set_carrierlist( FGNavList *n ) { carrierlist = n; } inline FGTACANList *get_channellist() const { return channellist; } inline void set_channellist( FGTACANList *c ) { channellist = c; } inline FGAirwayNetwork *get_airwaynet() const { return airwaynet; } inline void set_airwaynet( FGAirwayNetwork *a ) { airwaynet = a; } /** * Save the current state as the initial state. */ void saveInitialState (); /** * Restore the saved initial state, if any. */ void restoreInitialState (); }; extern FGGlobals *globals; #endif // _GLOBALS_HXX
ma deuxieme question concerne le pointeur de fonction :
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31 class SGEphemeris; class SGCommandMgr; class SGMagVar; class SGMaterialLib; class SGPropertyNode; class SGTime; class SGEventMgr; class SGSubsystemMgr; class SGSubsystem; class SGSoundMgr; class FGAIMgr; class FGATCMgr; class FGAircraftModel; class FGControls; class FGFlightPlanDispatcher; class FGNavList; class FGAirwayNetwork; class FGTACANList; class FGLight; class FGModelMgr; class FGRouteMgr; class FGScenery; class FGMultiplayMgr; class FGPanel; class FGTileMgr; class FGViewMgr; class FGViewer; class FGRenderer; class FGFontCache;
normalement le pointeur de fonction n'attend aucun argument :
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96 #ifndef _FG_OS_HXX #define _FG_OS_HXX #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <string> #include <vector> #include <osg/ref_ptr> #include <osg/Camera> #include <osg/GraphicsContext> enum { MOUSE_BUTTON_LEFT, MOUSE_BUTTON_MIDDLE, MOUSE_BUTTON_RIGHT }; enum { MOUSE_BUTTON_DOWN, MOUSE_BUTTON_UP }; enum { MOUSE_CURSOR_NONE, MOUSE_CURSOR_POINTER, MOUSE_CURSOR_WAIT, MOUSE_CURSOR_CROSSHAIR, MOUSE_CURSOR_LEFTRIGHT, MOUSE_CURSOR_TOPSIDE, MOUSE_CURSOR_BOTTOMSIDE, MOUSE_CURSOR_LEFTSIDE, MOUSE_CURSOR_RIGHTSIDE, MOUSE_CURSOR_TOPLEFT, MOUSE_CURSOR_TOPRIGHT, MOUSE_CURSOR_BOTTOMLEFT, MOUSE_CURSOR_BOTTOMRIGHT, }; enum { KEYMOD_NONE = 0, KEYMOD_RELEASED = 1, // Not a mod key, indicates "up" action KEYMOD_SHIFT = 2, KEYMOD_CTRL = 4, KEYMOD_ALT = 8, KEYMOD_META = 16, KEYMOD_SUPER = 32, KEYMOD_HYPER = 64, KEYMOD_MAX = 128 }; // A note on key codes: none are defined here. FlightGear has no // hard-coded interpretations of codes other than modifier keys, so we // can get away with that. The only firm requirement is that the // codes passed to the fgKeyHandler function be correctly interpreted // by the PUI library. Users who need to hard-code key codes // (probably not a good idea in any case) can use the pu.hxx header // for definitions. // // OS integration functions // void fgOSInit(int* argc, char** argv); void fgOSOpenWindow(bool stencil); void fgOSFullScreen(); void fgOSMainLoop(); void fgOSExit(int code); void fgSetMouseCursor(int cursor); int fgGetMouseCursor(); void fgWarpMouse(int x, int y); int fgGetKeyModifiers(); void fgRequestRedraw(); // // Callbacks and registration API // namespace osg { class Camera; class GraphicsContext; } namespace osgGA { class GUIEventAdapter; } typedef void (*fgIdleHandler)(); typedef void (*fgDrawHandler)(); typedef void (*fgWindowResizeHandler)(int w, int h); typedef void (*fgKeyHandler)(int key, int keymod, int mousex, int mousey); typedef void (*fgMouseClickHandler)(int button, int updown, int x, int y, bool mainWindow, const osgGA::GUIEventAdapter*); typedef void (*fgMouseMotionHandler)(int x, int y); void fgRegisterIdleHandler(fgIdleHandler func); void fgRegisterDrawHandler(fgDrawHandler func); void fgRegisterWindowResizeHandler(fgWindowResizeHandler func); void fgRegisterKeyHandler(fgKeyHandler func); void fgRegisterMouseClickHandler(fgMouseClickHandler func); void fgRegisterMouseMotionHandler(fgMouseMotionHandler func); #endif // _FG_OS_HXX
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2 typedef void (*fgIdleHandler)(); typedef void (*fgDrawHandler)();pourquoi ce ponteur de fonction à 0 en argumant ?.
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2 fgIdleHandler idleHandler; fgDrawHandler drawHandler;
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16 FGEventHandler::FGEventHandler() : idleHandler(0), drawHandler(0), windowResizeHandler(0), keyHandler(0), mouseClickHandler(0), mouseMotionHandler(0), statsHandler(new osgViewer::StatsHandler), statsEvent(new osgGA::GUIEventAdapter), statsType(osgViewer::StatsHandler::NO_STATS), currentModifiers(0), resizable(true), mouseWarped(false), scrollButtonPressed(false) {merci !
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4 FGEventHandler::FGEventHandler() : idleHandler(0), drawHandler(0),
merci !
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