1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Header: FGCoefficient.h
7 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
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
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
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.
23 Further information about the GNU General Public License can also be found on
24 the world wide web at http://www.gnu.org.
27 --------------------------------------------------------------------------------
30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
32 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
34 #ifndef FGCOEFFICIENT_H
35 #define FGCOEFFICIENT_H
37 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
42 # include <simgear/compiler.h>
47 #include "FGConfigFile.h"
49 #include "FGJSBBase.h"
51 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
53 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
55 #define ID_COEFFICIENT "$Id$"
59 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
61 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
74 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
75 COMMENTS, REFERENCES, and NOTES [use "class documentation" below for API docs]
76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
78 Note that the coefficients need not be calculated each delta-t. This is
79 something that may be fixed someday.
81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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.
94 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
98 class FGCoefficient : public FGJSBBase
101 FGCoefficient(FGFDMExec*);
102 virtual ~FGCoefficient();
104 virtual bool Load(FGConfigFile* AC_cfg);
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;}
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);
122 enum Type {UNKNOWN, VALUE, VECTOR, TABLE, EQUATION};
129 double Value(double, double);
130 double Value(double);
133 eParam LookupR, LookupC;
137 double SD; // Actual stability derivative (or other coefficient) value
142 FGAtmosphere* Atmosphere;
144 FGAircraft* Aircraft;
145 FGTranslation* Translation;
146 FGRotation* Rotation;
147 FGPosition* Position;
148 FGAuxiliary* Auxiliary;
151 virtual void Debug(void);
154 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%