src/FDM/JSBSim/FGState.cpp

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Module:       FGState.cpp
   4  Author:       Jon Berndt
   5  Date started: 11/17/98
   6  Called by:    FGFDMExec and accessed by all models.
   7
   8  ------------- Copyright (C) 1999  Jon S. Berndt (jsb@hal-pc.org) -------------
   9
  10  This program is free software; you can redistribute it and/or modify it under
  11  the terms of the GNU Lesser General Public License as published by the Free Software
  12  Foundation; either version 2 of the License, or (at your option) any later
  13  version.
  14
  15  This program is distributed in the hope that it will be useful, but WITHOUT
  16  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  18  details.
  19
  20  You should have received a copy of the GNU Lesser General Public License along with
  21  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  22  Place - Suite 330, Boston, MA  02111-1307, USA.
  23
  24  Further information about the GNU Lesser General Public License can also be found on
  25  the world wide web at http://www.gnu.org.
  26
  27 FUNCTIONAL DESCRIPTION
  28 --------------------------------------------------------------------------------
  29 See header file.
  30
  31 HISTORY
  32 --------------------------------------------------------------------------------
  33 11/17/98   JSB   Created
  34
  35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  36 INCLUDES
  37 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  38
  39 #ifdef FGFS
  40 #  include <simgear/compiler.h>
  41 #  include <math.h>
  42 #else
  43 #  if defined(sgi) && !defined(__GNUC__)
  44 #    include <math.h>
  45 #  else
  46 #    include <cmath>
  47 #  endif
  48 #endif
  49
  50 #include "FGState.h"
  51
  52 namespace JSBSim {
  53
  54 static const char *IdSrc = "$Id$";
  55 static const char *IdHdr = ID_STATE;
  56
  57 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  58 MACROS
  59 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  60
  61 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  62 CLASS IMPLEMENTATION
  63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  64
  65 FGState::FGState(FGFDMExec* fdex)
  66 {
  67   FDMExec = fdex;
  68
  69   sim_time = 0.0;
  70   dt = 1.0/120.0;
  71
  72   Aircraft     = FDMExec->GetAircraft();
  73   Propagate    = FDMExec->GetPropagate();
  74   Auxiliary    = FDMExec->GetAuxiliary();
  75   FCS          = FDMExec->GetFCS();
  76   Atmosphere   = FDMExec->GetAtmosphere();
  77   Aerodynamics = FDMExec->GetAerodynamics();
  78   GroundReactions = FDMExec->GetGroundReactions();
  79   Propulsion      = FDMExec->GetPropulsion();
  80   PropertyManager = FDMExec->GetPropertyManager();
  81
  82   bind();
  83
  84   Debug(0);
  85 }
  86
  87 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  88
  89 FGState::~FGState()
  90 {
  91   Debug(1);
  92 }
  93
  94 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  95
  96 void FGState::Initialize(FGInitialCondition *FGIC)
  97 {
  98   sim_time = 0.0;
  99
 100   Propagate->SetInitialState( FGIC );
 101
 102   Atmosphere->Run();
 103   Atmosphere->SetWindNED( FGIC->GetWindNFpsIC(),
 104                           FGIC->GetWindEFpsIC(),
 105                           FGIC->GetWindDFpsIC() );
 106
 107   FGColumnVector3 vAeroUVW;
 108   vAeroUVW = Propagate->GetUVW() + Propagate->GetTl2b()*Atmosphere->GetWindNED();
 109
 110   double alpha, beta;
 111   if (vAeroUVW(eW) != 0.0)
 112     alpha = vAeroUVW(eU)*vAeroUVW(eU) > 0.0 ? atan2(vAeroUVW(eW), vAeroUVW(eU)) : 0.0;
 113   else
 114     alpha = 0.0;
 115   if (vAeroUVW(eV) != 0.0)
 116     beta = vAeroUVW(eU)*vAeroUVW(eU)+vAeroUVW(eW)*vAeroUVW(eW) > 0.0 ? atan2(vAeroUVW(eV), (fabs(vAeroUVW(eU))/vAeroUVW(eU))*sqrt(vAeroUVW(eU)*vAeroUVW(eU) + vAeroUVW(eW)*vAeroUVW(eW))) : 0.0;
 117   else
 118     beta = 0.0;
 119
 120   Auxiliary->SetAB(alpha, beta);
 121
 122   double Vt = vAeroUVW.Magnitude();
 123   Auxiliary->SetVt(Vt);
 124
 125   Auxiliary->SetMach(Vt/Atmosphere->GetSoundSpeed());
 126
 127   double qbar = 0.5*Vt*Vt*Atmosphere->GetDensity();
 128   Auxiliary->Setqbar(qbar);
 129 }
 130
 131 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 132
 133 void FGState::bind(void)
 134 {
 135   PropertyManager->Tie("sim-time-sec", this, &FGState::Getsim_time);
 136 }
 137
 138 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 139 //    The bitmasked value choices are as follows:
 140 //    unset: In this case (the default) JSBSim would only print
 141 //       out the normally expected messages, essentially echoing
 142 //       the config files as they are read. If the environment
 143 //       variable is not set, debug_lvl is set to 1 internally
 144 //    0: This requests JSBSim not to output any messages
 145 //       whatsoever.
 146 //    1: This value explicity requests the normal JSBSim
 147 //       startup messages
 148 //    2: This value asks for a message to be printed out when
 149 //       a class is instantiated
 150 //    4: When this value is set, a message is displayed when a
 151 //       FGModel object executes its Run() method
 152 //    8: When this value is set, various runtime state variables
 153 //       are printed out periodically
 154 //    16: When set various parameters are sanity checked and
 155 //       a message is printed out when they go out of bounds
 156
 157 void FGState::Debug(int from)
 158 {
 159   if (debug_lvl <= 0) return;
 160
 161   if (debug_lvl & 1) { // Standard console startup message output
 162     if (from == 0) { // Constructor
 163
 164     }
 165   }
 166   if (debug_lvl & 2 ) { // Instantiation/Destruction notification
 167     if (from == 0) cout << "Instantiated: FGState" << endl;
 168     if (from == 1) cout << "Destroyed:    FGState" << endl;
 169   }
 170   if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
 171   }
 172   if (debug_lvl & 8 ) { // Runtime state variables
 173   }
 174   if (debug_lvl & 16) { // Sanity checking
 175   }
 176   if (debug_lvl & 64) {
 177     if (from == 0) { // Constructor
 178       cout << IdSrc << endl;
 179       cout << IdHdr << endl;
 180     }
 181   }
 182 }
 183 }