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flightgear/JSBsim/FGFDMExec.cpp

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4.6 KiB
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/*******************************************************************************
Module: FGFDMExec.cpp
Author: Jon S. Berndt
Date started: 11/17/98
Purpose: Schedules and runs the model routines.
Called by: The GUI.
------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.
Further information about the GNU General Public License can also be found on
the world wide web at http://www.gnu.org.
FUNCTIONAL DESCRIPTION
--------------------------------------------------------------------------------
This class wraps up the simulation scheduling routines.
HISTORY
--------------------------------------------------------------------------------
11/17/98 JSB Created
********************************************************************************
INCLUDES
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <iostream.h>
#include <time.h>
#include "FGFDMExec.h"
#include "FGState.h"
#include "FGAtmosphere.h"
#include "FGFCS.h"
#include "FGAircraft.h"
#include "FGTranslation.h"
#include "FGRotation.h"
#include "FGPosition.h"
#include "FGAuxiliary.h"
#include "FGOutput.h"
/*******************************************************************************
************************************ CODE **************************************
*******************************************************************************/
// Constructor
FGFDMExec::FGFDMExec(void)
{
FirstModel = 0;
Error = 0;
State = 0;
Atmosphere = 0;
FCS = 0;
Aircraft = 0;
Translation = 0;
Rotation = 0;
Position = 0;
Auxiliary = 0;
Output = 0;
// Instantiate this FDM Executive's Models
Atmosphere = new FGAtmosphere(this);
FCS = new FGFCS(this);
Aircraft = new FGAircraft(this);
Translation = new FGTranslation(this);
Rotation = new FGRotation(this);
Position = new FGPosition(this);
Auxiliary = new FGAuxiliary(this);
Output = new FGOutput(this);
State = new FGState(this);
// Initialize models so they can communicate with each other
if (!Atmosphere->InitModel()) {cerr << "Atmosphere model init failed"; Error+=1;}
if (!FCS->InitModel()) {cerr << "FCS model init failed"; Error+=2;}
if (!Aircraft->InitModel()) {cerr << "Aircraft model init failed"; Error+=4;}
if (!Translation->InitModel()){cerr << "Translation model init failed"; Error+=8;}
if (!Rotation->InitModel()) {cerr << "Rotation model init failed"; Error+=16;}
if (!Position->InitModel()) {cerr << "Position model init failed"; Error+=32;}
if (!Auxiliary->InitModel()) {cerr << "Auxiliary model init failed"; Error+=64;}
if (!Output->InitModel()) {cerr << "Output model init failed"; Error+=128;}
Schedule(Atmosphere, 5);
Schedule(FCS, 1);
Schedule(Aircraft, 1);
Schedule(Rotation, 1);
Schedule(Translation, 1);
Schedule(Position, 1);
Schedule(Auxiliary, 1);
Schedule(Output, 5);
terminate = false;
frozen = false;
}
FGFDMExec::~FGFDMExec(void)
{
}
int FGFDMExec::Schedule(FGModel* model, int rate)
{
FGModel* model_iterator;
model_iterator = FirstModel;
if (model_iterator == 0L) { // this is the first model
FirstModel = model;
FirstModel->NextModel = 0L;
FirstModel->SetRate(rate);
} else { // subsequent model
while (model_iterator->NextModel != 0L) {
model_iterator = model_iterator->NextModel;
}
model_iterator->NextModel = model;
model_iterator->NextModel->SetRate(rate);
}
return 0;
}
bool FGFDMExec::Run(void)
{
FGModel* model_iterator;
if (frozen) return true;
model_iterator = FirstModel;
if (model_iterator == 0L) return false;
while (!model_iterator->Run())
{
model_iterator = model_iterator->NextModel;
if (model_iterator == 0L) break;
}
State->IncrTime();
return true;
}