src/FDM/JSBSim/FGCoefficient.h

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Header:       FGCoefficient.h
   4  Author:       Jon Berndt
   5  Date started: 12/28/98
   6
   7  ------------- Copyright (C) 1999  Jon S. Berndt (jsb@hal-pc.org) -------------
   8
   9  This program is free software; you can redistribute it and/or modify it under
  10  the terms of the GNU General Public License as published by the Free Software
  11  Foundation; either version 2 of the License, or (at your option) any later
  12  version.
  13
  14  This program is distributed in the hope that it will be useful, but WITHOUT
  15  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  17  details.
  18
  19  You should have received a copy of the GNU General Public License along with
  20  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  21  Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23  Further information about the GNU General Public License can also be found on
  24  the world wide web at http://www.gnu.org.
  25
  26 HISTORY
  27 --------------------------------------------------------------------------------
  28 12/28/98   JSB   Created
  29
  30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  31 SENTRY
  32 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  33
  34 #ifndef FGCOEFFICIENT_H
  35 #define FGCOEFFICIENT_H
  36
  37 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  38 INCLUDES
  39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  40
  41 #ifdef FGFS
  42 #  include <simgear/compiler.h>
  43 #endif
  44
  45 #include <vector>
  46 #include <string>
  47 #include "FGConfigFile.h"
  48 #include "FGTable.h"
  49 #include "FGJSBBase.h"
  50
  51 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  52 DEFINITIONS
  53 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  54
  55 #define ID_COEFFICIENT "$Id$"
  56
  57 using std::vector;
  58
  59 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  60 FORWARD DECLARATIONS
  61 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  62
  63 class FGFDMExec;
  64 class FGState;
  65 class FGAtmosphere;
  66 class FGFCS;
  67 class FGAircraft;
  68 class FGTranslation;
  69 class FGRotation;
  70 class FGPosition;
  71 class FGAuxiliary;
  72 class FGOutput;
  73
  74 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  75 COMMENTS, REFERENCES, and NOTES [use "class documentation" below for API docs]
  76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  77
  78 Note that the coefficients need not be calculated each delta-t. This is
  79 something that may be fixed someday.
  80
  81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  82 CLASS DOCUMENTATION
  83 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  84
  85 /** This class models the stability derivative coefficient lookup tables.
  86     Each coefficient for an axis is stored in that axes' vector of coefficients.
  87     Each FDM execution frame the Run() method of the [currently] FGAircraft model
  88     is called and the coefficient value is calculated.
  89     @author Jon S. Berndt
  90     @version $Id$
  91     @see -
  92 */
  93
  94 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  95 CLASS DECLARATION
  96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  97
  98 class FGCoefficient : public FGJSBBase
  99 {
 100 public:
 101   FGCoefficient(FGFDMExec*);
 102   virtual ~FGCoefficient();
 103
 104   virtual bool Load(FGConfigFile* AC_cfg);
 105
 106   typedef vector <eParam> MultVec;
 107   virtual double TotalValue(void);
 108   virtual inline string Getname(void) {return name;}
 109   virtual inline double GetSD(void) { return SD;}
 110   inline MultVec Getmultipliers(void) {return multipliers;}
 111   void DumpSD(void);
 112
 113   /** Outputs coefficient information.
 114       Non-dimensionalizing parameter descriptions are output
 115       for each aero coefficient defined.
 116       @param multipliers the list of multipliers for this coefficient.*/
 117   virtual void DisplayCoeffFactors(void);
 118   virtual inline string GetCoefficientStrings(void) { return name; }
 119   virtual string GetCoefficientValues(void);
 120
 121 private:
 122   enum Type {UNKNOWN, VALUE, VECTOR, TABLE, EQUATION};
 123
 124   int numInstances;
 125   string filename;
 126   string description;
 127   string name;
 128   string method;
 129   string multparms;
 130   string multparmsRow;
 131   string multparmsCol;
 132   double Value(double, double);
 133   double Value(double);
 134   double Value(void);
 135   double StaticValue;
 136   eParam LookupR, LookupC;
 137   MultVec multipliers;
 138   int rows, columns;
 139   Type type;
 140   double SD; // Actual stability derivative (or other coefficient) value
 141   FGTable *Table;
 142
 143   FGFDMExec*      FDMExec;
 144   FGState*        State;
 145   FGAtmosphere*   Atmosphere;
 146   FGFCS*          FCS;
 147   FGAircraft*     Aircraft;
 148   FGTranslation*  Translation;
 149   FGRotation*     Rotation;
 150   FGPosition*     Position;
 151   FGAuxiliary*    Auxiliary;
 152   FGOutput*       Output;
 153
 154   virtual void Debug(int from);
 155 };
 156
 157 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 158 #endif
 159