1 // fg_props.cxx -- support for FlightGear properties.
3 // Written by David Megginson, started 2000.
5 // Copyright (C) 2000, 2001 David Megginson - david@megginson.com
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 # include <simgear/compiler.h>
27 #include <simgear/misc/exception.hxx>
31 #include <Autopilot/newauto.hxx>
32 #include <Aircraft/aircraft.hxx>
33 #include <Time/tmp.hxx>
34 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
35 #ifndef FG_OLD_WEATHER
36 # include <WeatherCM/FGLocalWeatherDatabase.h>
38 # include <Weather/weather.hxx>
40 #include <Objects/matlib.hxx>
45 #include "fg_props.hxx"
46 #include "viewmgr.hxx"
48 #if !defined(SG_HAVE_NATIVE_SGI_COMPILERS)
49 SG_USING_STD(istream);
50 SG_USING_STD(ostream);
53 static double getWindNorth ();
54 static double getWindEast ();
55 static double getWindDown ();
57 // Allow the view to be set from two axes (i.e. a joystick hat)
58 // This needs to be in FGViewer itself, somehow.
59 static double axisLong = 0.0;
60 static double axisLat = 0.0;
62 static bool winding_ccw = false; // FIXME: temporary
64 static bool fdm_data_logging = false; // FIXME: temporary
71 _set_view_from_axes ()
73 // Take no action when hat is centered
74 if ( ( axisLong < 0.01 ) &&
75 ( axisLong > -0.01 ) &&
83 /* Do all the quick and easy cases */
84 if (axisLong < 0) { // Longitudinal axis forward
85 if (axisLat == axisLong)
87 else if (axisLat == - axisLong)
89 else if (axisLat == 0)
91 } else if (axisLong > 0) { // Longitudinal axis backward
92 if (axisLat == - axisLong)
94 else if (axisLat == axisLong)
96 else if (axisLat == 0)
98 } else if (axisLong == 0) { // Longitudinal axis neutral
101 else if (axisLat > 0)
103 else return; /* And assertion failure maybe? */
106 /* Do all the difficult cases */
108 viewDir = SGD_RADIANS_TO_DEGREES * atan2 ( -axisLat, -axisLong );
109 if ( viewDir < -1 ) viewDir += 360;
111 // SG_LOG(SG_INPUT, SG_ALERT, "Joystick Lat=" << axisLat << " and Long="
112 // << axisLong << " gave angle=" << viewDir );
114 globals->get_current_view()->set_goal_view_offset(viewDir*SGD_DEGREES_TO_RADIANS);
115 // globals->get_current_view()->set_view_offset(viewDir*SGD_DEGREES_TO_RADIANS);
119 ////////////////////////////////////////////////////////////////////////
120 // Default property bindings (not yet handled by any module).
121 ////////////////////////////////////////////////////////////////////////
125 * Get the pause state of the sim.
130 return globals->get_freeze();
135 * Set the pause state of the sim.
138 setFreeze (bool freeze)
140 globals->set_freeze(freeze);
144 * Return the current aircraft directory (UIUC) as a string.
154 * Set the current aircraft directory (UIUC).
157 setAircraftDir (string dir)
159 if (getAircraftDir() != dir) {
161 // needReinit(); FIXME!!
167 * Get the current view offset in degrees.
172 return (globals->get_current_view()
173 ->get_view_offset() * SGD_RADIANS_TO_DEGREES);
178 setViewOffset (double offset)
180 globals->get_current_view()->set_view_offset(offset * SGD_DEGREES_TO_RADIANS);
186 return (globals->get_current_view()
187 ->get_goal_view_offset() * SGD_RADIANS_TO_DEGREES);
191 setGoalViewOffset (double offset)
193 while ( offset < 0 ) {
196 while ( offset > 360.0 ) {
199 // Snap to center if we are close
200 if ( fabs(offset) < 1.0 || fabs(offset) > 359.0 ) {
204 globals->get_current_view()
205 ->set_goal_view_offset(offset * SGD_DEGREES_TO_RADIANS);
210 * Pilot position offset from CG.
213 getPilotPositionXOffset ()
215 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
216 float * offset = pilot_view->get_pilot_offset();
221 setPilotPositionXOffset (float x)
223 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
224 float * offset = pilot_view->get_pilot_offset();
225 pilot_view->set_pilot_offset(x, offset[1], offset[2]);
229 getPilotPositionYOffset ()
231 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
232 float * offset = pilot_view->get_pilot_offset();
237 setPilotPositionYOffset (float y)
239 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
240 float * offset = pilot_view->get_pilot_offset();
241 pilot_view->set_pilot_offset(offset[0], y, offset[2]);
245 getPilotPositionZOffset ()
247 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
248 float * offset = pilot_view->get_pilot_offset();
253 setPilotPositionZOffset (float z)
255 FGViewer * pilot_view = globals->get_viewmgr()->get_view(0);
256 float * offset = pilot_view->get_pilot_offset();
257 pilot_view->set_pilot_offset(offset[0], offset[1], z);
262 * Return the current Zulu time.
269 struct tm * t = globals->get_time_params()->getGmt();
270 sprintf(buf, "%.4d-%.2d-%.2dT%.2d:%.2d:%.2d",
271 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
272 t->tm_hour, t->tm_min, t->tm_sec);
279 * Set the current Zulu time.
282 setDateString (string date_string)
284 SGTime * st = globals->get_time_params();
285 struct tm * current_time = st->getGmt();
288 // Scan for basic ISO format
289 // YYYY-MM-DDTHH:MM:SS
290 int ret = sscanf(date_string.c_str(), "%d-%d-%dT%d:%d:%d",
291 &(new_time.tm_year), &(new_time.tm_mon),
292 &(new_time.tm_mday), &(new_time.tm_hour),
293 &(new_time.tm_min), &(new_time.tm_sec));
295 // Be pretty picky about this, so
296 // that strange things don't happen
297 // if the save file has been edited
300 SG_LOG(SG_INPUT, SG_ALERT, "Date/time string " << date_string
301 << " not in YYYY-MM-DDTHH:MM:SS format; skipped");
305 // OK, it looks like we got six
306 // values, one way or another.
307 new_time.tm_year -= 1900;
308 new_time.tm_mon -= 1;
310 // Now, tell flight gear to use
311 // the new time. This was far
312 // too difficult, by the way.
314 mktime(&new_time) - mktime(current_time) + globals->get_warp();
315 double lon = current_aircraft.fdm_state->get_Longitude();
316 double lat = current_aircraft.fdm_state->get_Latitude();
317 globals->set_warp(warp);
318 st->update(lon, lat, warp);
319 fgUpdateSkyAndLightingParams();
323 * Return the GMT as a string.
330 struct tm * t = globals->get_time_params()->getGmt();
331 sprintf(buf, " %.2d:%.2d:%.2d",
332 t->tm_hour, t->tm_min, t->tm_sec);
339 * Get the texture rendering state.
344 return (material_lib.get_step() == 0);
349 * Set the texture rendering state.
352 setTextures (bool textures)
355 material_lib.set_step(0);
357 material_lib.set_step(1);
362 * Return the magnetic variation
367 return globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
372 * Return the magnetic dip
377 return globals->get_mag()->get_magdip() * SGD_RADIANS_TO_DEGREES;
382 * Return the current heading in degrees.
387 return current_aircraft.fdm_state->get_Psi() * SGD_RADIANS_TO_DEGREES - getMagVar();
392 * Return the current engine0 rpm
397 if ( current_aircraft.fdm_state->get_engine(0) != NULL ) {
398 return current_aircraft.fdm_state->get_engine(0)->get_RPM();
406 * Return the current engine0 EGT.
411 if ( current_aircraft.fdm_state->get_engine(0) != NULL ) {
412 return current_aircraft.fdm_state->get_engine(0)->get_EGT();
419 * Return the current engine0 CHT.
424 if ( current_aircraft.fdm_state->get_engine(0) != NULL ) {
425 return current_aircraft.fdm_state->get_engine(0)->get_CHT();
432 * Return the current engine0 Manifold Pressure.
437 if ( current_aircraft.fdm_state->get_engine(0) != NULL ) {
438 return current_aircraft.fdm_state->get_engine(0)->get_Manifold_Pressure();
446 * Return the current engine0 fuel flow
451 if ( current_aircraft.fdm_state->get_engine(0) != NULL ) {
452 return current_aircraft.fdm_state->get_engine(0)->get_Fuel_Flow();
459 * Return the fuel level in tank 1
464 return current_aircraft.fdm_state->get_Tank1Fuel();
468 setTank1Fuel ( double gals )
470 current_aircraft.fdm_state->set_Tank1Fuel( gals );
474 * Return the fuel level in tank 2
479 return current_aircraft.fdm_state->get_Tank2Fuel();
483 setTank2Fuel ( double gals )
485 current_aircraft.fdm_state->set_Tank2Fuel( gals );
490 * Get the autopilot altitude lock (true=on).
495 return (current_autopilot->get_AltitudeEnabled() &&
496 current_autopilot->get_AltitudeMode()
497 == FGAutopilot::FG_ALTITUDE_LOCK);
502 * Set the autopilot altitude lock (true=on).
505 setAPAltitudeLock (bool lock)
507 current_autopilot->set_AltitudeMode(FGAutopilot::FG_ALTITUDE_LOCK);
508 current_autopilot->set_AltitudeEnabled(lock);
513 * Get the autopilot target altitude in feet.
518 return current_autopilot->get_TargetAltitude() * SG_METER_TO_FEET;
523 * Set the autopilot target altitude in feet.
526 setAPAltitude (double altitude)
528 current_autopilot->set_TargetAltitude( altitude * SG_FEET_TO_METER );
532 * Get the autopilot altitude lock (true=on).
537 return (current_autopilot->get_AltitudeEnabled() &&
538 (current_autopilot->get_AltitudeMode()
539 == FGAutopilot::FG_ALTITUDE_GS1));
544 * Set the autopilot altitude lock (true=on).
547 setAPGSLock (bool lock)
549 current_autopilot->set_AltitudeMode(FGAutopilot::FG_ALTITUDE_GS1);
550 current_autopilot->set_AltitudeEnabled(lock);
555 * Get the autopilot terrain lock (true=on).
560 return (current_autopilot->get_AltitudeEnabled() &&
561 (current_autopilot->get_AltitudeMode()
562 == FGAutopilot::FG_ALTITUDE_TERRAIN));
567 * Set the autopilot terrain lock (true=on).
570 setAPTerrainLock (bool lock)
572 current_autopilot->set_AltitudeMode(FGAutopilot::FG_ALTITUDE_TERRAIN);
573 current_autopilot->set_AltitudeEnabled(lock);
578 * Get the autopilot target altitude in feet.
583 return current_autopilot->get_TargetClimbRate() * SG_METER_TO_FEET;
588 * Set the autopilot target altitude in feet.
591 setAPClimb (double rate)
593 current_autopilot->set_TargetClimbRate( rate * SG_FEET_TO_METER );
598 * Get the autopilot heading lock (true=on).
604 (current_autopilot->get_HeadingEnabled() &&
605 current_autopilot->get_HeadingMode() == DEFAULT_AP_HEADING_LOCK);
610 * Set the autopilot heading lock (true=on).
613 setAPHeadingLock (bool lock)
616 current_autopilot->set_HeadingMode(DEFAULT_AP_HEADING_LOCK);
617 current_autopilot->set_HeadingEnabled(true);
619 current_autopilot->set_HeadingEnabled(false);
625 * Get the autopilot heading bug in degrees.
630 return current_autopilot->get_DGTargetHeading();
635 * Set the autopilot heading bug in degrees.
638 setAPHeadingBug (double heading)
640 current_autopilot->set_DGTargetHeading( heading );
645 * Get the autopilot wing leveler lock (true=on).
651 (current_autopilot->get_HeadingEnabled() &&
652 current_autopilot->get_HeadingMode() == FGAutopilot::FG_TC_HEADING_LOCK);
657 * Set the autopilot wing leveler lock (true=on).
660 setAPWingLeveler (bool lock)
663 current_autopilot->set_HeadingMode(FGAutopilot::FG_TC_HEADING_LOCK);
664 current_autopilot->set_HeadingEnabled(true);
666 current_autopilot->set_HeadingEnabled(false);
671 * Return true if the autopilot is locked to NAV1.
677 (current_autopilot->get_HeadingEnabled() &&
678 current_autopilot->get_HeadingMode() == FGAutopilot::FG_HEADING_NAV1);
683 * Set the autopilot NAV1 lock.
686 setAPNAV1Lock (bool lock)
689 current_autopilot->set_HeadingMode(FGAutopilot::FG_HEADING_NAV1);
690 current_autopilot->set_HeadingEnabled(true);
691 } else if (current_autopilot->get_HeadingMode() ==
692 FGAutopilot::FG_HEADING_NAV1) {
693 current_autopilot->set_HeadingEnabled(false);
698 * Get the autopilot autothrottle lock.
701 getAPAutoThrottleLock ()
703 return current_autopilot->get_AutoThrottleEnabled();
708 * Set the autothrottle lock.
711 setAPAutoThrottleLock (bool lock)
713 current_autopilot->set_AutoThrottleEnabled(lock);
719 getAPRudderControl ()
721 if (getAPHeadingLock())
722 return current_autopilot->get_TargetHeading();
724 return globals->get_controls()->get_rudder();
729 setAPRudderControl (double value)
731 if (getAPHeadingLock()) {
732 SG_LOG(SG_GENERAL, SG_DEBUG, "setAPRudderControl " << value );
733 value -= current_autopilot->get_TargetHeading();
734 current_autopilot->HeadingAdjust(value < 0.0 ? -1.0 : 1.0);
736 globals->get_controls()->set_rudder(value);
742 getAPElevatorControl ()
744 if (getAPAltitudeLock())
745 return current_autopilot->get_TargetAltitude();
747 return globals->get_controls()->get_elevator();
752 setAPElevatorControl (double value)
754 if (getAPAltitudeLock()) {
755 SG_LOG(SG_GENERAL, SG_DEBUG, "setAPElevatorControl " << value );
756 value -= current_autopilot->get_TargetAltitude();
757 current_autopilot->AltitudeAdjust(value < 0.0 ? 100.0 : -100.0);
759 globals->get_controls()->set_elevator(value);
765 getAPThrottleControl ()
767 if (getAPAutoThrottleLock())
768 return 0.0; // always resets
770 return globals->get_controls()->get_throttle(0);
775 setAPThrottleControl (double value)
777 if (getAPAutoThrottleLock())
778 current_autopilot->AutoThrottleAdjust(value < 0.0 ? -0.01 : 0.01);
780 globals->get_controls()->set_throttle(0, value);
785 * Get the current visibility (meters).
790 #ifndef FG_OLD_WEATHER
791 return WeatherDatabase->getWeatherVisibility();
793 return current_weather.get_visibility();
799 * Set the current visibility (meters).
802 setVisibility (double visibility)
804 #ifndef FG_OLD_WEATHER
805 WeatherDatabase->setWeatherVisibility(visibility);
807 current_weather.set_visibility(visibility);
812 * Get the current wind north velocity (feet/second).
817 return current_aircraft.fdm_state->get_V_north_airmass();
822 * Set the current wind north velocity (feet/second).
825 setWindNorth (double speed)
827 current_aircraft.fdm_state
828 ->set_Velocities_Local_Airmass(speed, getWindEast(), getWindDown());
833 * Get the current wind east velocity (feet/second).
838 return current_aircraft.fdm_state->get_V_east_airmass();
843 * Set the current wind east velocity (feet/second).
846 setWindEast (double speed)
848 cout << "Set wind-east to " << speed << endl;
849 current_aircraft.fdm_state->set_Velocities_Local_Airmass(getWindNorth(),
856 * Get the current wind down velocity (feet/second).
861 return current_aircraft.fdm_state->get_V_down_airmass();
866 * Set the current wind down velocity (feet/second).
869 setWindDown (double speed)
871 current_aircraft.fdm_state->set_Velocities_Local_Airmass(getWindNorth(),
879 return globals->get_current_view()->get_fov();
885 globals->get_current_view()->set_fov( fov );
891 return globals->get_warp();
897 globals->set_warp(warp);
903 return globals->get_warp_delta();
907 setWarpDelta (long delta)
909 globals->set_warp_delta(delta);
913 setViewAxisLong (double axis)
919 setViewAxisLat (double axis)
931 setWindingCCW (bool state)
935 glFrontFace ( GL_CCW );
937 glFrontFace ( GL_CW );
943 #if defined(FX) && !defined(WIN32)
944 return global_fullscreen;
951 setFullScreen (bool state)
953 #if defined(FX) && !defined(WIN32)
954 global_fullscreen = state;
955 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
956 XMesaSetFXmode( global_fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW );
964 return fdm_data_logging;
968 setFDMDataLogging (bool state)
970 // kludge; no getter or setter available
971 if (state != fdm_data_logging) {
972 fgToggleFDMdataLogging();
973 fdm_data_logging = state;
978 ////////////////////////////////////////////////////////////////////////
979 // Tie the properties.
980 ////////////////////////////////////////////////////////////////////////
986 fgTie("/sim/freeze", getFreeze, setFreeze);
987 fgTie("/sim/aircraft-dir", getAircraftDir, setAircraftDir);
988 fgTie("/sim/view/offset-deg", getViewOffset, setViewOffset);
989 fgSetArchivable("/sim/view/offset-deg");
990 fgTie("/sim/view/goal-offset-deg", getGoalViewOffset, setGoalViewOffset);
991 fgSetArchivable("/sim/view/goal-offset-deg");
992 fgTie("/sim/view/pilot/x-offset-m",
993 getPilotPositionXOffset, setPilotPositionXOffset);
994 fgSetArchivable("/sim/view/pilot/x-offset-m");
995 fgTie("/sim/view/pilot/y-offset-m",
996 getPilotPositionYOffset, setPilotPositionYOffset);
997 fgSetArchivable("/sim/view/pilot/y-offset-m");
998 fgTie("/sim/view/pilot/z-offset-m",
999 getPilotPositionZOffset, setPilotPositionZOffset);
1000 fgSetArchivable("/sim/view/pilot/z-offset-m");
1001 fgTie("/sim/time/gmt", getDateString, setDateString);
1002 fgSetArchivable("/sim/time/gmt");
1003 fgTie("/sim/time/gmt-string", getGMTString);
1004 fgTie("/sim/rendering/textures", getTextures, setTextures);
1007 fgTie("/orientation/heading-magnetic-deg", getHeadingMag);
1010 fgTie("/engines/engine[0]/rpm", getRPM);
1011 fgTie("/engines/engine[0]/egt-degf", getEGT);
1012 fgTie("/engines/engine[0]/cht-degf", getCHT);
1013 fgTie("/engines/engine[0]/mp-osi", getMP);
1014 fgTie("/engines/engine[0]/fuel-flow-gph", getFuelFlow);
1017 fgTie("/consumables/fuel/tank[0]/level-gal_us",
1018 getTank1Fuel, setTank1Fuel, false);
1019 fgSetArchivable("/consumables/fuel/tank[0]/level-gal_us");
1020 fgTie("/consumables/fuel/tank[1]/level-gal_us",
1021 getTank2Fuel, setTank2Fuel, false);
1022 fgSetArchivable("/consumables/fuel/tank[1]/level-gal_us");
1025 fgTie("/autopilot/locks/altitude", getAPAltitudeLock, setAPAltitudeLock);
1026 fgSetArchivable("/autopilot/locks/altitude");
1027 fgTie("/autopilot/settings/altitude-ft", getAPAltitude, setAPAltitude);
1028 fgSetArchivable("/autopilot/settings/altitude-ft");
1029 fgTie("/autopilot/locks/glide-slope", getAPGSLock, setAPGSLock);
1030 fgSetArchivable("/autopilot/locks/glide-slope");
1031 fgTie("/autopilot/locks/terrain", getAPTerrainLock, setAPTerrainLock);
1032 fgSetArchivable("/autopilot/locks/terrain");
1033 fgTie("/autopilot/settings/climb-rate-fpm", getAPClimb, setAPClimb, false);
1034 fgSetArchivable("/autopilot/settings/climb-rate-fpm");
1035 fgTie("/autopilot/locks/heading", getAPHeadingLock, setAPHeadingLock);
1036 fgSetArchivable("/autopilot/locks/heading");
1037 fgTie("/autopilot/settings/heading-bug-deg",
1038 getAPHeadingBug, setAPHeadingBug, false);
1039 fgSetArchivable("/autopilot/settings/heading-bug-deg");
1040 fgTie("/autopilot/locks/wing-leveler", getAPWingLeveler, setAPWingLeveler);
1041 fgSetArchivable("/autopilot/locks/wing-leveler");
1042 fgTie("/autopilot/locks/nav[0]", getAPNAV1Lock, setAPNAV1Lock);
1043 fgSetArchivable("/autopilot/locks/nav[0]");
1044 fgTie("/autopilot/locks/auto-throttle",
1045 getAPAutoThrottleLock, setAPAutoThrottleLock);
1046 fgSetArchivable("/autopilot/locks/auto-throttle");
1047 fgTie("/autopilot/control-overrides/rudder",
1048 getAPRudderControl, setAPRudderControl);
1049 fgSetArchivable("/autopilot/control-overrides/rudder");
1050 fgTie("/autopilot/control-overrides/elevator",
1051 getAPElevatorControl, setAPElevatorControl);
1052 fgSetArchivable("/autopilot/control-overrides/elevator");
1053 fgTie("/autopilot/control-overrides/throttle",
1054 getAPThrottleControl, setAPThrottleControl);
1055 fgSetArchivable("/autopilot/control-overrides/throttle");
1058 fgTie("/environment/visibility-m", getVisibility, setVisibility);
1059 fgSetArchivable("/environment/visibility-m");
1060 fgTie("/environment/wind-north-fps", getWindNorth, setWindNorth);
1061 fgSetArchivable("/environment/wind-north-fps");
1062 fgTie("/environment/wind-east-fps", getWindEast, setWindEast);
1063 fgSetArchivable("/environment/wind-east-fps");
1064 fgTie("/environment/wind-down-fps", getWindDown, setWindDown);
1065 fgSetArchivable("/environment/wind-down-fps");
1067 fgTie("/environment/magnetic-variation-deg", getMagVar);
1068 fgTie("/environment/magnetic-dip-deg", getMagDip);
1071 fgTie("/sim/field-of-view", getFOV, setFOV);
1072 fgSetArchivable("/sim/field-of-view");
1073 fgTie("/sim/time/warp", getWarp, setWarp, false);
1074 fgTie("/sim/time/warp-delta", getWarpDelta, setWarpDelta);
1075 fgTie("/sim/view/axes/long", (double(*)())0, setViewAxisLong);
1076 fgTie("/sim/view/axes/lat", (double(*)())0, setViewAxisLat);
1078 // Misc. Temporary junk.
1079 fgTie("/sim/temp/winding-ccw", getWindingCCW, setWindingCCW);
1080 fgTie("/sim/temp/full-screen", getFullScreen, setFullScreen);
1081 fgTie("/sim/temp/fdm-data-logging", getFDMDataLogging, setFDMDataLogging);
1089 _set_view_from_axes();
1094 ////////////////////////////////////////////////////////////////////////
1095 // Save and restore.
1096 ////////////////////////////////////////////////////////////////////////
1100 * Save the current state of the simulator to a stream.
1103 fgSaveFlight (ostream &output)
1106 writeProperties(output, globals->get_props());
1107 } catch (const sg_exception &e) {
1108 guiErrorMessage("Error saving flight: ", e);
1116 * Restore the current state of the simulator from a stream.
1119 fgLoadFlight (istream &input)
1121 SGPropertyNode props;
1123 readProperties(input, &props);
1124 } catch (const sg_exception &e) {
1125 guiErrorMessage("Error reading saved flight: ", e);
1128 copyProperties(&props, globals->get_props());
1129 // When loading a flight, make it the
1130 // new initial state.
1131 globals->saveInitialState();
1137 ////////////////////////////////////////////////////////////////////////
1138 // Implementation of FGCondition.
1139 ////////////////////////////////////////////////////////////////////////
1141 FGCondition::FGCondition ()
1145 FGCondition::~FGCondition ()
1151 ////////////////////////////////////////////////////////////////////////
1152 // Implementation of FGPropertyCondition.
1153 ////////////////////////////////////////////////////////////////////////
1155 FGPropertyCondition::FGPropertyCondition (const string &propname)
1156 : _node(fgGetNode(propname, true))
1160 FGPropertyCondition::~FGPropertyCondition ()
1166 ////////////////////////////////////////////////////////////////////////
1167 // Implementation of FGNotCondition.
1168 ////////////////////////////////////////////////////////////////////////
1170 FGNotCondition::FGNotCondition (FGCondition * condition)
1171 : _condition(condition)
1175 FGNotCondition::~FGNotCondition ()
1181 FGNotCondition::test () const
1183 return !(_condition->test());
1188 ////////////////////////////////////////////////////////////////////////
1189 // Implementation of FGAndCondition.
1190 ////////////////////////////////////////////////////////////////////////
1192 FGAndCondition::FGAndCondition ()
1196 FGAndCondition::~FGAndCondition ()
1198 for (int i = 0; i < _conditions.size(); i++)
1199 delete _conditions[i];
1203 FGAndCondition::test () const
1205 int nConditions = _conditions.size();
1206 for (int i = 0; i < nConditions; i++) {
1207 if (!_conditions[i]->test())
1214 FGAndCondition::addCondition (FGCondition * condition)
1216 _conditions.push_back(condition);
1221 ////////////////////////////////////////////////////////////////////////
1222 // Implementation of FGOrCondition.
1223 ////////////////////////////////////////////////////////////////////////
1225 FGOrCondition::FGOrCondition ()
1229 FGOrCondition::~FGOrCondition ()
1231 for (int i = 0; i < _conditions.size(); i++)
1232 delete _conditions[i];
1236 FGOrCondition::test () const
1238 int nConditions = _conditions.size();
1239 for (int i = 0; i < nConditions; i++) {
1240 if (_conditions[i]->test())
1247 FGOrCondition::addCondition (FGCondition * condition)
1249 _conditions.push_back(condition);
1254 ////////////////////////////////////////////////////////////////////////
1255 // Implementation of FGComparisonCondition.
1256 ////////////////////////////////////////////////////////////////////////
1259 doComparison (const SGPropertyNode * left, const SGPropertyNode *right)
1261 switch (left->getType()) {
1262 case SGPropertyNode::BOOL: {
1263 bool v1 = left->getBoolValue();
1264 bool v2 = right->getBoolValue();
1266 return FGComparisonCondition::LESS_THAN;
1268 return FGComparisonCondition::GREATER_THAN;
1270 return FGComparisonCondition::EQUALS;
1273 case SGPropertyNode::INT: {
1274 int v1 = left->getIntValue();
1275 int v2 = right->getIntValue();
1277 return FGComparisonCondition::LESS_THAN;
1279 return FGComparisonCondition::GREATER_THAN;
1281 return FGComparisonCondition::EQUALS;
1284 case SGPropertyNode::LONG: {
1285 long v1 = left->getLongValue();
1286 long v2 = right->getLongValue();
1288 return FGComparisonCondition::LESS_THAN;
1290 return FGComparisonCondition::GREATER_THAN;
1292 return FGComparisonCondition::EQUALS;
1295 case SGPropertyNode::FLOAT: {
1296 float v1 = left->getFloatValue();
1297 float v2 = right->getFloatValue();
1299 return FGComparisonCondition::LESS_THAN;
1301 return FGComparisonCondition::GREATER_THAN;
1303 return FGComparisonCondition::EQUALS;
1306 case SGPropertyNode::DOUBLE: {
1307 double v1 = left->getDoubleValue();
1308 double v2 = right->getDoubleValue();
1310 return FGComparisonCondition::LESS_THAN;
1312 return FGComparisonCondition::GREATER_THAN;
1314 return FGComparisonCondition::EQUALS;
1317 case SGPropertyNode::STRING:
1318 case SGPropertyNode::NONE:
1319 case SGPropertyNode::UNSPECIFIED: {
1320 string v1 = left->getStringValue();
1321 string v2 = right->getStringValue();
1323 return FGComparisonCondition::LESS_THAN;
1325 return FGComparisonCondition::GREATER_THAN;
1327 return FGComparisonCondition::EQUALS;
1331 throw sg_exception("Unrecognized node type");
1336 FGComparisonCondition::FGComparisonCondition (Type type, bool reverse)
1345 FGComparisonCondition::~FGComparisonCondition ()
1347 delete _right_value;
1351 FGComparisonCondition::test () const
1353 // Always fail if incompletely specified
1354 if (_left_property == 0 ||
1355 (_right_property == 0 && _right_value == 0))
1358 // Get LESS_THAN, EQUALS, or GREATER_THAN
1360 doComparison(_left_property,
1361 (_right_property != 0 ? _right_property : _right_value));
1363 return (cmp == _type);
1365 return (cmp != _type);
1369 FGComparisonCondition::setLeftProperty (const string &propname)
1371 _left_property = fgGetNode(propname, true);
1375 FGComparisonCondition::setRightProperty (const string &propname)
1377 delete _right_value;
1379 _right_property = fgGetNode(propname, true);
1383 FGComparisonCondition::setRightValue (const SGPropertyNode *node)
1385 _right_property = 0;
1386 delete _right_value;
1387 _right_value = new SGPropertyNode(*node);
1392 ////////////////////////////////////////////////////////////////////////
1393 // Read a condition and use it if necessary.
1394 ////////////////////////////////////////////////////////////////////////
1396 // Forward declaration
1397 static FGCondition * readCondition (const SGPropertyNode * node);
1399 static FGCondition *
1400 readPropertyCondition (const SGPropertyNode * node)
1402 return new FGPropertyCondition(node->getStringValue());
1405 static FGCondition *
1406 readNotCondition (const SGPropertyNode * node)
1408 int nChildren = node->nChildren();
1409 for (int i = 0; i < nChildren; i++) {
1410 const SGPropertyNode * child = node->getChild(i);
1411 FGCondition * condition = readCondition(child);
1413 return new FGNotCondition(condition);
1415 SG_LOG(SG_COCKPIT, SG_ALERT, "Panel: empty 'not' condition");
1419 static FGCondition *
1420 readAndConditions (const SGPropertyNode * node)
1422 FGAndCondition * andCondition = new FGAndCondition;
1423 int nChildren = node->nChildren();
1424 for (int i = 0; i < nChildren; i++) {
1425 const SGPropertyNode * child = node->getChild(i);
1426 FGCondition * condition = readCondition(child);
1428 andCondition->addCondition(condition);
1430 return andCondition;
1433 static FGCondition *
1434 readOrConditions (const SGPropertyNode * node)
1436 FGOrCondition * orCondition = new FGOrCondition;
1437 int nChildren = node->nChildren();
1438 for (int i = 0; i < nChildren; i++) {
1439 const SGPropertyNode * child = node->getChild(i);
1440 FGCondition * condition = readCondition(child);
1442 orCondition->addCondition(condition);
1447 static FGCondition *
1448 readComparison (const SGPropertyNode * node,
1449 FGComparisonCondition::Type type,
1452 FGComparisonCondition * condition = new FGComparisonCondition(type, reverse);
1453 condition->setLeftProperty(node->getStringValue("property[0]"));
1454 if (node->hasValue("property[1]"))
1455 condition->setRightProperty(node->getStringValue("property[1]"));
1457 condition->setRightValue(node->getChild("value", 0));
1462 static FGCondition *
1463 readCondition (const SGPropertyNode * node)
1465 const string &name = node->getName();
1466 if (name == "property")
1467 return readPropertyCondition(node);
1468 else if (name == "not")
1469 return readNotCondition(node);
1470 else if (name == "and")
1471 return readAndConditions(node);
1472 else if (name == "or")
1473 return readOrConditions(node);
1474 else if (name == "less-than")
1475 return readComparison(node, FGComparisonCondition::LESS_THAN, false);
1476 else if (name == "less-than-equals")
1477 return readComparison(node, FGComparisonCondition::GREATER_THAN, true);
1478 else if (name == "greater-than")
1479 return readComparison(node, FGComparisonCondition::GREATER_THAN, false);
1480 else if (name == "greater-than-equals")
1481 return readComparison(node, FGComparisonCondition::LESS_THAN, true);
1482 else if (name == "equals")
1483 return readComparison(node, FGComparisonCondition::EQUALS, false);
1484 else if (name == "not-equals")
1485 return readComparison(node, FGComparisonCondition::EQUALS, true);
1492 ////////////////////////////////////////////////////////////////////////
1493 // Implementation of FGConditional.
1494 ////////////////////////////////////////////////////////////////////////
1496 FGConditional::FGConditional ()
1501 FGConditional::~FGConditional ()
1507 FGConditional::setCondition (FGCondition * condition)
1510 _condition = condition;
1514 FGConditional::test () const
1516 return ((_condition == 0) || _condition->test());
1521 // The top-level is always an implicit 'and' group
1523 fgReadCondition (const SGPropertyNode * node)
1525 return readAndConditions(node);
1529 // end of fg_props.cxx