src/ATC/AIPlane.cxx

   1 // FGAIPlane - abstract base class for an AI plane
   2 //
   3 // Written by David Luff, started 2002.
   4 //
   5 // Copyright (C) 2002  David C. Luff - david.luff@nottingham.ac.uk
   6 //
   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.
  11 //
  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.
  16 //
  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.
  20
  21 #include <Main/globals.hxx>
  22 #include <Main/fg_props.hxx>
  23 #include <simgear/math/point3d.hxx>
  24 #include <simgear/debug/logstream.hxx>
  25 #include <simgear/sound/soundmgr.hxx>
  26 #include <math.h>
  27 #include <string>
  28 SG_USING_STD(string);
  29
  30
  31 #include "AIPlane.hxx"
  32 #include "ATCdisplay.hxx"
  33
  34 FGAIPlane::FGAIPlane() {
  35         leg = LEG_UNKNOWN;
  36         tuned_station = NULL;
  37         pending_transmission = "";
  38         _timeout = 0;
  39         _pending = false;
  40         _callback_code = 0;
  41         _transmit = false;
  42         _transmitting = false;
  43         voice = false;
  44         playing = false;
  45         voiceOK = false;
  46         vPtr = NULL;
  47         track = 0.0;
  48         _tgtTrack = 0.0;
  49         _trackSet = false;
  50         _tgtRoll = 0.0;
  51         _rollSuspended = false;
  52 }
  53
  54 FGAIPlane::~FGAIPlane() {
  55 }
  56
  57 void FGAIPlane::Update(double dt) {
  58         if(_pending) {
  59                 if(tuned_station) {
  60                         if(tuned_station->GetFreqClear()) {
  61                                 //cout << "TUNED STATION FREQ CLEAR\n";
  62                                 tuned_station->SetFreqInUse();
  63                                 _pending = false;
  64                                 _transmit = true;
  65                                 _transmitting = false;
  66                         } else {
  67                                 if(_timeout > 0.0) {    // allows count down to be avoided by initially setting it to zero
  68                                         _timeout -= dt;
  69                                         if(_timeout <= 0.0) {
  70                                                 _timeout = 0.0;
  71                                                 _pending = false;
  72                                                 // timed out - don't render.
  73                                         }
  74                                 }
  75                         }
  76                 } else {
  77                         // Not tuned to ATC - Just go ahead and transmit
  78                         //cout << "NOT TUNED TO ATC\n";
  79                         _pending = false;
  80                         _transmit = true;
  81                         _transmitting = false;
  82                 }
  83         }
  84
  85         // This turns on rendering if on the same freq as the user
  86         // TODO - turn it off if user switches to another freq - keep track of where in message we are etc.
  87         if(_transmit) {
  88                 //cout << "transmit\n";
  89                 double user_freq0 = fgGetDouble("/radios/comm[0]/frequencies/selected-mhz");
  90                 double user_freq1 = fgGetDouble("/radios/comm[1]/frequencies/selected-mhz");
  91                 _counter = 0.0;
  92                 _max_count = 5.0;               // FIXME - hardwired length of message - need to calculate it!
  93
  94                 //cout << "Transmission = " << pending_transmission << '\n';
  95                 if(freq == user_freq0 || freq == user_freq1) {
  96                         //cout << "Transmitting..." << endl;
  97                         // we are on the same frequency, so check distance to the user plane
  98                         if(1) {
  99                                 // For now assume in range !!!
 100                                 // TODO - implement range checking
 101                                 Render(plane.callsign, false);
 102                         }
 103                 }
 104                 // Run the callback regardless of whether on same freq as user or not.
 105                 //cout << "_callback_code = " << _callback_code << '\n';
 106                 if(_callback_code) {
 107                         ProcessCallback(_callback_code);
 108                 }
 109                 _transmit = false;
 110                 _transmitting = true;
 111         } else if(_transmitting) {
 112                 if(_counter >= _max_count) {
 113                         NoRender(plane.callsign);
 114                         _transmitting = false;
 115                         // For now we'll let ATC decide whether to respond
 116                         //if(tuned_station) tuned_station->SetResponseReqd(plane.callsign);
 117                         if(tuned_station) tuned_station->NotifyTransmissionFinished(plane.callsign);
 118                 }
 119                 _counter += dt;
 120         }
 121
 122         // Fly the plane if necessary
 123         if(_trackSet) {
 124                 while((_tgtTrack - track) > 180.0) track += 360.0;
 125                 while((track - _tgtTrack) > 180.0) track -= 360.0;
 126                 double turn_time = 60.0;
 127                 track += (360.0 / turn_time) * dt * (_tgtTrack > track ? 1.0 : -1.0);
 128                 // TODO - bank a bit less for small turns.
 129                 Bank(25.0 * (_tgtTrack > track ? 1.0 : -1.0));
 130                 if(fabs(track - _tgtTrack) < 2.0) {             // TODO - might need to optimise the delta there - it's on the large (safe) side atm.
 131                         track = _tgtTrack;
 132                         LevelWings();
 133                 }
 134         }
 135
 136         if(!_rollSuspended) {
 137                 if(fabs(_roll - _tgtRoll) > 0.6) {
 138                         // This *should* bank us smoothly to any angle
 139                         _roll -= ((_roll - _tgtRoll)/fabs(_roll - _tgtRoll));
 140                 } else {
 141                         _roll = _tgtRoll;
 142                 }
 143         }
 144 }
 145
 146 void FGAIPlane::Transmit(int callback_code) {
 147         SG_LOG(SG_ATC, SG_INFO, "Transmit called for plane " << plane.callsign << ", msg = " << pending_transmission);
 148         _pending = true;
 149         _callback_code = callback_code;
 150         _timeout = 0.0;
 151 }
 152
 153 void FGAIPlane::ConditionalTransmit(double timeout, int callback_code) {
 154         SG_LOG(SG_ATC, SG_INFO, "Timed transmit called for plane " << plane.callsign << ", msg = " << pending_transmission);
 155         _pending = true;
 156         _callback_code = callback_code;
 157         _timeout = timeout;
 158 }
 159
 160 void FGAIPlane::ImmediateTransmit(int callback_code) {
 161         Render(plane.callsign, false);
 162         if(callback_code) {
 163                 ProcessCallback(callback_code);
 164         }
 165 }
 166
 167 // Derived classes should override this.
 168 void FGAIPlane::ProcessCallback(int code) {
 169 }
 170
 171 // Render a transmission
 172 // Outputs the transmission either on screen or as audio depending on user preference
 173 // The refname is a string to identify this sample to the sound manager
 174 // The repeating flag indicates whether the message should be repeated continuously or played once.
 175 void FGAIPlane::Render(string refname, bool repeating) {
 176 #ifdef ENABLE_AUDIO_SUPPORT
 177         voice = (voiceOK && fgGetBool("/sim/sound/audible")
 178                  && fgGetBool("/sim/sound/voice"));
 179         if(voice) {
 180                 int len;
 181                 unsigned char* buf = vPtr->WriteMessage((char*)pending_transmission.c_str(), len, voice);
 182                 if(voice) {
 183                         SGSimpleSound* simple = new SGSimpleSound(buf, len);
 184                         // TODO - at the moment the volume is always set off comm1
 185                         // and can't be changed after the transmission has started.
 186                         simple->set_volume(5.0 * fgGetDouble("/radios/comm[0]/volume"));
 187                         globals->get_soundmgr()->add(simple, refname);
 188                         if(repeating) {
 189                                 globals->get_soundmgr()->play_looped(refname);
 190                         } else {
 191                                 globals->get_soundmgr()->play_once(refname);
 192                         }
 193                 }
 194                 delete[] buf;
 195         }
 196 #endif  // ENABLE_AUDIO_SUPPORT
 197         if(!voice) {
 198                 // first rip the underscores and the pause hints out of the string - these are for the convienience of the voice parser
 199                 for(unsigned int i = 0; i < pending_transmission.length(); ++i) {
 200                         if((pending_transmission.substr(i,1) == "_") || (pending_transmission.substr(i,1) == "/")) {
 201                                 pending_transmission[i] = ' ';
 202                         }
 203                 }
 204                 globals->get_ATC_display()->RegisterSingleMessage(pending_transmission, 0.0);
 205         }
 206         playing = true;
 207 }
 208
 209
 210 // Cease rendering a transmission.
 211 void FGAIPlane::NoRender(string refname) {
 212         if(playing) {
 213                 if(voice) {
 214 #ifdef ENABLE_AUDIO_SUPPORT
 215                         globals->get_soundmgr()->stop(refname);
 216                         globals->get_soundmgr()->remove(refname);
 217 #endif
 218                 } else {
 219                         globals->get_ATC_display()->CancelRepeatingMessage();
 220                 }
 221                 playing = false;
 222         }
 223 }
 224
 225 /*
 226
 227 */
 228
 229 void FGAIPlane::RegisterTransmission(int code) {
 230 }
 231
 232
 233 // Return what type of landing we're doing on this circuit
 234 LandingType FGAIPlane::GetLandingOption() {
 235         return(FULL_STOP);
 236 }
 237
 238
 239 ostream& operator << (ostream& os, PatternLeg pl) {
 240         switch(pl) {
 241         case(TAKEOFF_ROLL):   return(os << "TAKEOFF ROLL");
 242         case(CLIMBOUT):       return(os << "CLIMBOUT");
 243         case(TURN1):          return(os << "TURN1");
 244         case(CROSSWIND):      return(os << "CROSSWIND");
 245         case(TURN2):          return(os << "TURN2");
 246         case(DOWNWIND):       return(os << "DOWNWIND");
 247         case(TURN3):          return(os << "TURN3");
 248         case(BASE):           return(os << "BASE");
 249         case(TURN4):          return(os << "TURN4");
 250         case(FINAL):          return(os << "FINAL");
 251         case(LANDING_ROLL):   return(os << "LANDING ROLL");
 252         case(LEG_UNKNOWN):    return(os << "UNKNOWN");
 253         }
 254         return(os << "ERROR - Unknown switch in PatternLeg operator << ");
 255 }
 256
 257
 258 ostream& operator << (ostream& os, LandingType lt) {
 259         switch(lt) {
 260         case(FULL_STOP):      return(os << "FULL STOP");
 261         case(STOP_AND_GO):    return(os << "STOP AND GO");
 262         case(TOUCH_AND_GO):   return(os << "TOUCH AND GO");
 263         case(AIP_LT_UNKNOWN): return(os << "UNKNOWN");
 264         }
 265         return(os << "ERROR - Unknown switch in LandingType operator << ");
 266 }
 267