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_openal.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                                                 if(_callback_code == 99) {
  74                                                         // MEGA-HACK - 99 is the remove self callback - currently this *does* need to be run even if the transmission isn't made.
  75                                                         ProcessCallback(_callback_code);
  76                                                 }
  77                                         }
  78                                 }
  79                         }
  80                 } else {
  81                         // Not tuned to ATC - Just go ahead and transmit
  82                         //cout << "NOT TUNED TO ATC\n";
  83                         _pending = false;
  84                         _transmit = true;
  85                         _transmitting = false;
  86                 }
  87         }
  88
  89         // This turns on rendering if on the same freq as the user
  90         // TODO - turn it off if user switches to another freq - keep track of where in message we are etc.
  91         if(_transmit) {
  92                 //cout << "transmit\n";
  93                 double user_freq0 = fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
  94                 double user_freq1 = fgGetDouble("/instrumentation/comm[1]/frequencies/selected-mhz");
  95                 _counter = 0.0;
  96                 _max_count = 5.0;               // FIXME - hardwired length of message - need to calculate it!
  97
  98                 //cout << "Transmission = " << pending_transmission << '\n';
  99
 100                 // The radios dialog seems to set slightly imprecise freqs, eg 118.099998
 101                 // The eplison stuff below is a work-around
 102                 double eps0 = fabs(freq - user_freq0);
 103                 double eps1 = fabs(freq - user_freq1);
 104                 if(eps0 < 0.002 || eps1 < 0.002) {
 105                         //cout << "Transmitting..." << endl;
 106                         // we are on the same frequency, so check distance to the user plane
 107                         if(1) {
 108                                 // For now assume in range !!!
 109                                 // TODO - implement range checking
 110                                 Render(plane.callsign, false);
 111                         }
 112                 }
 113                 // Run the callback regardless of whether on same freq as user or not.
 114                 if(_callback_code) {
 115                         ProcessCallback(_callback_code);
 116                 }
 117                 _transmit = false;
 118                 _transmitting = true;
 119         } else if(_transmitting) {
 120                 if(_counter >= _max_count) {
 121                         NoRender(plane.callsign);
 122                         _transmitting = false;
 123                         // For now we'll let ATC decide whether to respond
 124                         //if(tuned_station) tuned_station->SetResponseReqd(plane.callsign);
 125                         //if(tuned_station->get_ident() == "KRHV") cout << "Notifying transmission finished" << endl;
 126                         if(tuned_station) tuned_station->NotifyTransmissionFinished(plane.callsign);
 127                 }
 128                 _counter += dt;
 129         }
 130
 131         // Fly the plane if necessary
 132         if(_trackSet) {
 133                 while((_tgtTrack - track) > 180.0) track += 360.0;
 134                 while((track - _tgtTrack) > 180.0) track -= 360.0;
 135                 double turn_time = 60.0;
 136                 track += (360.0 / turn_time) * dt * (_tgtTrack > track ? 1.0 : -1.0);
 137                 // TODO - bank a bit less for small turns.
 138                 Bank(25.0 * (_tgtTrack > track ? 1.0 : -1.0));
 139                 if(fabs(track - _tgtTrack) < 2.0) {             // TODO - might need to optimise the delta there - it's on the large (safe) side atm.
 140                         track = _tgtTrack;
 141                         LevelWings();
 142                 }
 143         }
 144
 145         if(!_rollSuspended) {
 146                 if(fabs(_roll - _tgtRoll) > 0.6) {
 147                         // This *should* bank us smoothly to any angle
 148                         _roll -= ((_roll - _tgtRoll)/fabs(_roll - _tgtRoll));
 149                 } else {
 150                         _roll = _tgtRoll;
 151                 }
 152         }
 153 }
 154
 155 void FGAIPlane::Transmit(int callback_code) {
 156         SG_LOG(SG_ATC, SG_INFO, "Transmit called for plane " << plane.callsign << ", msg = " << pending_transmission);
 157         _pending = true;
 158         _callback_code = callback_code;
 159         _timeout = 0.0;
 160 }
 161
 162 void FGAIPlane::ConditionalTransmit(double timeout, int callback_code) {
 163         SG_LOG(SG_ATC, SG_INFO, "Timed transmit called for plane " << plane.callsign << ", msg = " << pending_transmission);
 164         _pending = true;
 165         _callback_code = callback_code;
 166         _timeout = timeout;
 167 }
 168
 169 void FGAIPlane::ImmediateTransmit(int callback_code) {
 170         Render(plane.callsign, false);
 171         if(callback_code) {
 172                 ProcessCallback(callback_code);
 173         }
 174 }
 175
 176 // Derived classes should override this.
 177 void FGAIPlane::ProcessCallback(int code) {
 178 }
 179
 180 // Render a transmission
 181 // Outputs the transmission either on screen or as audio depending on user preference
 182 // The refname is a string to identify this sample to the sound manager
 183 // The repeating flag indicates whether the message should be repeated continuously or played once.
 184 void FGAIPlane::Render(string refname, bool repeating) {
 185 #ifdef ENABLE_AUDIO_SUPPORT
 186         voice = (voiceOK && fgGetBool("/sim/sound/voice"));
 187         if(voice) {
 188                 int len;
 189                 unsigned char* buf = vPtr->WriteMessage((char*)pending_transmission.c_str(), len, voice);
 190                 if(voice) {
 191                         SGSoundSample* simple = new SGSoundSample(buf, len, 8000, false);
 192                         // TODO - at the moment the volume is always set off comm1
 193                         // and can't be changed after the transmission has started.
 194                         simple->set_volume(5.0 * fgGetDouble("/instrumentation/comm[0]/volume"));
 195                         globals->get_soundmgr()->add(simple, refname);
 196                         if(repeating) {
 197                                 globals->get_soundmgr()->play_looped(refname);
 198                         } else {
 199                                 globals->get_soundmgr()->play_once(refname);
 200                         }
 201                 }
 202                 delete[] buf;
 203         }
 204 #endif  // ENABLE_AUDIO_SUPPORT
 205         if(!voice) {
 206                 // first rip the underscores and the pause hints out of the string - these are for the convienience of the voice parser
 207                 for(unsigned int i = 0; i < pending_transmission.length(); ++i) {
 208                         if((pending_transmission.substr(i,1) == "_") || (pending_transmission.substr(i,1) == "/")) {
 209                                 pending_transmission[i] = ' ';
 210                         }
 211                 }
 212                 globals->get_ATC_display()->RegisterSingleMessage(pending_transmission, 0.0);
 213         }
 214         playing = true;
 215 }
 216
 217
 218 // Cease rendering a transmission.
 219 void FGAIPlane::NoRender(string refname) {
 220         if(playing) {
 221                 if(voice) {
 222 #ifdef ENABLE_AUDIO_SUPPORT
 223                         globals->get_soundmgr()->stop(refname);
 224                         globals->get_soundmgr()->remove(refname);
 225 #endif
 226                 } else {
 227                         globals->get_ATC_display()->CancelRepeatingMessage();
 228                 }
 229                 playing = false;
 230         }
 231 }
 232
 233 /*
 234
 235 */
 236
 237 void FGAIPlane::RegisterTransmission(int code) {
 238 }
 239
 240
 241 // Return what type of landing we're doing on this circuit
 242 LandingType FGAIPlane::GetLandingOption() {
 243         return(FULL_STOP);
 244 }
 245
 246
 247 ostream& operator << (ostream& os, PatternLeg pl) {
 248         switch(pl) {
 249         case(TAKEOFF_ROLL):   return(os << "TAKEOFF ROLL");
 250         case(CLIMBOUT):       return(os << "CLIMBOUT");
 251         case(TURN1):          return(os << "TURN1");
 252         case(CROSSWIND):      return(os << "CROSSWIND");
 253         case(TURN2):          return(os << "TURN2");
 254         case(DOWNWIND):       return(os << "DOWNWIND");
 255         case(TURN3):          return(os << "TURN3");
 256         case(BASE):           return(os << "BASE");
 257         case(TURN4):          return(os << "TURN4");
 258         case(FINAL):          return(os << "FINAL");
 259         case(LANDING_ROLL):   return(os << "LANDING ROLL");
 260         case(LEG_UNKNOWN):    return(os << "UNKNOWN");
 261         }
 262         return(os << "ERROR - Unknown switch in PatternLeg operator << ");
 263 }
 264
 265
 266 ostream& operator << (ostream& os, LandingType lt) {
 267         switch(lt) {
 268         case(FULL_STOP):      return(os << "FULL STOP");
 269         case(STOP_AND_GO):    return(os << "STOP AND GO");
 270         case(TOUCH_AND_GO):   return(os << "TOUCH AND GO");
 271         case(AIP_LT_UNKNOWN): return(os << "UNKNOWN");
 272         }
 273         return(os << "ERROR - Unknown switch in LandingType operator << ");
 274 }
 275