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 *******************************************************************************/
41 # include <Include/compiler.h>
43 # ifdef FG_HAVE_STD_INCLUDES
56 /*******************************************************************************
58 *******************************************************************************/
67 #define FG_ALPHADOT 32
69 #define FG_BETADOT 128
70 #define FG_PITCHRATE 256
71 #define FG_ROLLRATE 512
72 #define FG_YAWRATE 1024
73 #define FG_ELEVATOR 2048
74 #define FG_AILERON 4096
75 #define FG_RUDDER 8192
77 #define FG_ALTITUDE 32768L
78 #define FG_BI2VEL 65536L
79 #define FG_CI2VEL 131072L
81 /*******************************************************************************
83 *******************************************************************************/
95 /*******************************************************************************
96 COMMENTS, REFERENCES, and NOTES
97 ********************************************************************************
99 This class models the stability derivative coefficient lookup tables or
100 equations. Note that the coefficients need not be calculated each delta-t.
121 ********************************************************************************
123 *******************************************************************************/
128 FGCoefficient(FGFDMExec*, ifstream&);
129 ~FGCoefficient(void);
131 bool Allocate(int, int);
132 float Value(float, float);
135 float TotalValue(void);
136 inline float GetSDValue(void) {return SD;}
137 inline void SetSDValue(float tt) {SD = tt;}
139 enum Type {UNKNOWN, VALUE, VECTOR, TABLE, EQUATION};
144 typedef map<string, long> CoeffMap;
153 float LookupR, LookupC;
154 long int mult_idx[10];
159 float SD; // Actual stability derivative (or other coefficient) value
161 float GetCoeffVal(int);
165 FGAtmosphere* Atmosphere;
167 FGAircraft* Aircraft;
168 FGTranslation* Translation;
169 FGRotation* Rotation;
170 FGPosition* Position;
171 FGAuxiliary* Auxiliary;
175 /******************************************************************************/