1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
8 This program is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free Software
10 Foundation; either version 2 of the License, or (at your option) any later
13 This program is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 You should have received a copy of the GNU General Public License along with
19 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
20 Place - Suite 330, Boston, MA 02111-1307, USA.
22 Further information about the GNU General Public License can also be found on
23 the world wide web at http://www.gnu.org.
26 --------------------------------------------------------------------------------
28 7/31/99 TP Added RunIC function that runs the sim so that every frame
29 begins with the IC values from the given FGInitialCondition
32 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
36 #ifndef FGFDMEXEC_HEADER_H
37 #define FGFDMEXEC_HEADER_H
39 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
41 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
44 #include "FGInitialCondition.h"
45 #include "FGJSBBase.h"
46 #include "FGPropertyManager.h"
49 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
51 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
53 #define ID_FDMEXEC "$Id$"
55 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
57 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
59 class FGInitialCondition;
61 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
62 COMMENTS, REFERENCES, and NOTES [use "class documentation" below for API docs]
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
65 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
69 /** Encapsulates the JSBSim simulation executive.
72 @see <a href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jsbsim/JSBSim/FGFDMExec.h?rev=HEAD&content-type=text/vnd.viewcvs-markup">
74 @see <a href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jsbsim/JSBSim/FGFDMExec.cpp?rev=HEAD&content-type=text/vnd.viewcvs-markup">
77 @doc This class is the interface class through which all other simulation classes
78 are instantiated, initialized, and run. When integrated with FlightGear (or
79 other flight simulator) this class is typically instantiated by an interface
80 class on the simulator side.
82 When an aircraft model is loaded the config file is parsed and for each of the
83 sections of the config file (propulsion, flight control, etc.) the
84 corresponding "ReadXXX()" method is called. From within this method the
85 "Load()" method of that system is called (e.g. LoadFCS).
87 <h4>JSBSim Debugging Directives</h4>
89 This describes to any interested entity the debug level
90 requested by setting the JSBSIM_DEBUG environment variable.
91 The bitmasked value choices are as follows:<ol>
92 <li><b>unset</b>: In this case (the default) JSBSim would only print
93 out the normally expected messages, essentially echoing
94 the config files as they are read. If the environment
95 variable is not set, debug_lvl is set to 1 internally</li>
96 <li><b>0</b>: This requests JSBSim not to output any messages
98 <li><b>1</b>: This value explicity requests the normal JSBSim
100 <li><b>2</b>: This value asks for a message to be printed out when
101 a class is instantiated</li>
102 <li><b>4</b>: When this value is set, a message is displayed when a
103 FGModel object executes its Run() method</li>
104 <li><b>8</b>: When this value is set, various runtime state variables
105 are printed out periodically</li>
106 <li><b>16</b>: When set various parameters are sanity checked and
107 a message is printed out when they go out of bounds</li>
112 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
116 class FGFDMExec : public FGJSBBase
120 /// Default constructor
121 FGFDMExec(FGPropertyManager* root = 0);
123 /// Default destructor
126 /** This routine places a model into the runlist at the specified rate. The
127 "rate" is not really a clock rate. It represents how many calls to the
128 FGFDMExec::Run() method must be made before the model is executed. A
129 value of 1 means that the model will be executed for each call to the
130 exec's Run() method. A value of 5 means that the model will only be
131 executed every 5th call to the exec's Run() method.
132 @param model A pointer to the model being scheduled.
133 @param rate The rate at which to execute the model as described above.
134 @return Currently returns 0 always. */
135 int Schedule(FGModel* model, int rate);
137 /** This executes each scheduled model in succession.
138 @return true if successful, false if sim should be ended */
141 /** Initializes the sim with a set of initial conditions.
142 @param fgic A pointer to a filled out initial conditions class which
143 describes the desired initial conditions.
144 @return true if successful
146 bool RunIC(FGInitialCondition *fgic);
149 void Freeze(void) {frozen = true;}
152 void Resume(void) {frozen = false;}
154 /** Loads an aircraft model.
155 @param AircraftPath path to the aircraft directory. For instance:
156 "aircraft". Under aircraft, then, would be directories for various
157 modeled aircraft such as C172/, x15/, etc.
158 @param EnginePath path to the directory under which engine config
159 files are kept, for instance "engine"
160 @param model the name of the aircraft model itself. This file will
161 be looked for in the directory specified in the AircraftPath variable,
162 and in turn under the directory with the same name as the model. For
163 instance: "aircraft/x15/x15.xml"
164 @return true if successful*/
165 bool LoadModel(string AircraftPath, string EnginePath, string model);
167 bool SetEnginePath(string path) {EnginePath = path; return true;}
168 bool SetAircraftPath(string path) {AircraftPath = path; return true;}
170 /// @name Top-level executive State and Model retrieval mechanism
172 /// Returns the FGState pointer.
173 inline FGState* GetState(void) {return State;}
174 /// Returns the FGAtmosphere pointer.
175 inline FGAtmosphere* GetAtmosphere(void) {return Atmosphere;}
176 /// Returns the FGFCS pointer.
177 inline FGFCS* GetFCS(void) {return FCS;}
178 /// Returns the FGPropulsion pointer.
179 inline FGPropulsion* GetPropulsion(void) {return Propulsion;}
180 /// Returns the FGAircraft pointer.
181 inline FGMassBalance* GetMassBalance(void) {return MassBalance;}
182 /// Returns the FGAerodynamics pointer
183 inline FGAerodynamics* GetAerodynamics(void){return Aerodynamics;}
184 /// Returns the FGInertial pointer.
185 inline FGInertial* GetInertial(void) {return Inertial;}
186 /// Returns the FGGroundReactions pointer.
187 inline FGGroundReactions* GetGroundReactions(void) {return GroundReactions;}
188 /// Returns the FGAircraft pointer.
189 inline FGAircraft* GetAircraft(void) {return Aircraft;}
190 /// Returns the FGTranslation pointer.
191 inline FGTranslation* GetTranslation(void) {return Translation;}
192 /// Returns the FGRotation pointer.
193 inline FGRotation* GetRotation(void) {return Rotation;}
194 /// Returns the FGPosition pointer.
195 inline FGPosition* GetPosition(void) {return Position;}
196 /// Returns the FGAuxiliary pointer.
197 inline FGAuxiliary* GetAuxiliary(void) {return Auxiliary;}
198 /// Returns the FGOutput pointer.
199 inline FGOutput* GetOutput(void) {return Output;}
202 /// Retrieves the engine path.
203 inline string GetEnginePath(void) {return EnginePath;}
204 /// Retrieves the aircraft path.
205 inline string GetAircraftPath(void) {return AircraftPath;}
207 FGPropertyManager* GetPropertyManager(void);
208 vector <string> EnumerateFDMs(void);
209 void SetSlave(void) {IsSlave = true;}
219 static unsigned int FDMctr;
222 static FGPropertyManager *master;
223 FGPropertyManager *instance;
229 double roll, pitch, yaw;
235 roll = pitch = yaw = 0.0;
249 FGAtmosphere* Atmosphere;
251 FGPropulsion* Propulsion;
252 FGMassBalance* MassBalance;
253 FGAerodynamics* Aerodynamics;
254 FGInertial* Inertial;
255 FGGroundReactions* GroundReactions;
256 FGAircraft* Aircraft;
257 FGTranslation* Translation;
258 FGRotation* Rotation;
259 FGPosition* Position;
260 FGAuxiliary* Auxiliary;
263 vector <slaveData*> SlaveFDMList;
265 bool ReadMetrics(FGConfigFile*);
266 bool ReadSlave(FGConfigFile*);
267 bool ReadPropulsion(FGConfigFile*);
268 bool ReadFlightControls(FGConfigFile*);
269 bool ReadAerodynamics(FGConfigFile*);
270 bool ReadUndercarriage(FGConfigFile*);
271 bool ReadPrologue(FGConfigFile*);
272 bool ReadOutput(FGConfigFile*);
275 bool DeAllocate(void);
276 void Debug(int from);
279 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%