/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
+
Module: FGEngine.cpp
Author: Jon Berndt
Date started: 01/21/99
Called by: FGAircraft
-
+
------------- 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
--------------------------------------------------------------------------------
See header file.
-
+
HISTORY
--------------------------------------------------------------------------------
01/21/99 JSB Created
09/03/99 JSB Changed Rocket thrust equation to correct -= Thrust instead of
+= Thrust (thanks to Tony Peden)
-
+
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGEngine.h"
#include "FGTank.h"
+#include "FGPropeller.h"
+#include "FGNozzle.h"
namespace JSBSim {
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
-FGEngine::FGEngine(FGFDMExec* exec)
+FGEngine::FGEngine(FGFDMExec* exec, int engine_number) : EngineNumber(engine_number)
{
Name = "";
Type = etUnknown;
FuelNeed = OxidizerNeed = 0.0;
Starved = Running = Cranking = false;
PctPower = 0.0;
- EngineNumber = -1;
TrimMode = false;
FuelFlow_gph = 0.0;
FuelFlow_pph = 0.0;
+ FuelFreeze = false;
FDMExec = exec;
State = FDMExec->GetState();
FCS = FDMExec->GetFCS();
Propulsion = FDMExec->GetPropulsion();
Aircraft = FDMExec->GetAircraft();
- Translation = FDMExec->GetTranslation();
- Rotation = FDMExec->GetRotation();
- Position = FDMExec->GetPosition();
+ Propagate = FDMExec->GetPropagate();
Auxiliary = FDMExec->GetAuxiliary();
Output = FDMExec->GetOutput();
-
- PropertyManager = FDMExec->GetPropertyManager();
+ PropertyManager = FDMExec->GetPropertyManager();
+
+ char property_name[80];
+ snprintf(property_name, 80, "propulsion/engine[%u]/thrust", EngineNumber);
+ PropertyManager->Tie( property_name, &Thrust);
+
Debug(0);
}
FGEngine::~FGEngine()
{
+ if (Thruster) delete Thruster;
+
+ char property_name[80];
+ snprintf(property_name, 80, "propulsion/engine[%u]/thrust", EngineNumber);
+ PropertyManager->Untie( property_name);
+
Debug(1);
}
void FGEngine::ConsumeFuel(void)
{
- double Fshortage, Oshortage;
+ if (FuelFreeze) return;
+ unsigned int i;
+ double Fshortage, Oshortage, TanksWithFuel, TanksWithOxidizer;
FGTank* Tank;
+ bool haveOxTanks = false;
if (TrimMode) return;
- Fshortage = Oshortage = 0.0;
- for (unsigned int i=0; i<SourceTanks.size(); i++) {
+ Fshortage = Oshortage = TanksWithFuel = TanksWithOxidizer = 0.0;
+
+ // count how many assigned tanks have fuel or oxidizer
+ for (i=0; i<SourceTanks.size(); i++) {
+ Tank = Propulsion->GetTank(SourceTanks[i]);
+ if (Tank->GetType() == FGTank::ttFUEL){
+ if (Tank->GetContents() > 0.0) {
+ ++TanksWithFuel;
+ }
+ } else if (Tank->GetType() == FGTank::ttOXIDIZER) {
+ haveOxTanks = true;
+ if (Tank->GetContents() > 0.0) {
+ ++TanksWithOxidizer;
+ }
+ }
+ }
+ if (!TanksWithFuel || (haveOxTanks && !TanksWithOxidizer)) return;
+
+ for (i=0; i<SourceTanks.size(); i++) {
Tank = Propulsion->GetTank(SourceTanks[i]);
if (Tank->GetType() == FGTank::ttFUEL) {
- Fshortage += Tank->Reduce(CalcFuelNeed()/Propulsion->GetnumSelectedFuelTanks());
- } else {
- Oshortage += Tank->Reduce(CalcOxidizerNeed()/Propulsion->GetnumSelectedOxiTanks());
+ Fshortage += Tank->Drain(CalcFuelNeed()/TanksWithFuel);
+ } else if (Tank->GetType() == FGTank::ttOXIDIZER) {
+ Oshortage += Tank->Drain(CalcOxidizerNeed()/TanksWithOxidizer);
}
}
SourceTanks.push_back(tkID);
}
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+FGColumnVector3& FGEngine::GetBodyForces(void)
+{
+ return Thruster->GetBodyForces();
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+FGColumnVector3& FGEngine::GetMoments(void)
+{
+ return Thruster->GetMoments();
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+bool FGEngine::LoadThruster(FGConfigFile* AC_cfg)
+{
+ string token, fullpath, localpath;
+ string thrType, engineFileName;
+ FGConfigFile* Cfg_ptr = 0;
+ double xLoc, yLoc, zLoc, Pitch, Yaw;
+ double P_Factor = 0, Sense = 0.0;
+ string enginePath = FDMExec->GetEnginePath();
+ string aircraftPath = FDMExec->GetAircraftPath();
+ thrusterFileName = AC_cfg->GetValue("FILE");
+
+# ifndef macintosh
+ fullpath = enginePath + "/";
+ localpath = aircraftPath + "/" + "/Engines/";
+# else
+ fullpath = enginePath + ";";
+ localpath = aircraftPath + ";" + ";Engines;";
+# endif
+
+ // Look in the Aircraft/Engines directory first
+ FGConfigFile Local_Thruster_cfg(localpath + thrusterFileName + ".xml");
+ FGConfigFile Thruster_cfg(fullpath + thrusterFileName + ".xml");
+
+ if (Local_Thruster_cfg.IsOpen()) {
+ Cfg_ptr = &Local_Thruster_cfg;
+ if (debug_lvl > 0) cout << "\n Reading thruster from file: " << localpath
+ + thrusterFileName + ".xml"<< endl;
+ } else {
+ if (Thruster_cfg.IsOpen()) {
+ Cfg_ptr = &Thruster_cfg;
+ if (debug_lvl > 0) cout << "\n Reading thruster from file: " << fullpath
+ + thrusterFileName + ".xml"<< endl;
+ }
+ }
+
+ if (Cfg_ptr) {
+ Cfg_ptr->GetNextConfigLine();
+ thrType = Cfg_ptr->GetValue();
+
+ if (thrType == "FG_PROPELLER") {
+ Thruster = new FGPropeller(FDMExec, Cfg_ptr, EngineNumber);
+ } else if (thrType == "FG_NOZZLE") {
+ Thruster = new FGNozzle(FDMExec, Cfg_ptr, EngineNumber);
+ } else if (thrType == "FG_DIRECT") {
+ Thruster = new FGThruster( FDMExec, Cfg_ptr, EngineNumber);
+ }
+
+ AC_cfg->GetNextConfigLine();
+ while ((token = AC_cfg->GetValue()) != string("/AC_THRUSTER")) {
+ *AC_cfg >> token;
+ if (token == "XLOC") *AC_cfg >> xLoc;
+ else if (token == "YLOC") *AC_cfg >> yLoc;
+ else if (token == "ZLOC") *AC_cfg >> zLoc;
+ else if (token == "PITCH") *AC_cfg >> Pitch;
+ else if (token == "YAW") *AC_cfg >> Yaw;
+ else if (token == "P_FACTOR") *AC_cfg >> P_Factor;
+ else if (token == "SENSE") *AC_cfg >> Sense;
+ else cerr << "Unknown identifier: " << token << " in engine file: "
+ << engineFileName << endl;
+ }
+
+ Thruster->SetLocation(xLoc, yLoc, zLoc);
+ Thruster->SetAnglesToBody(0, Pitch, Yaw);
+ if (thrType == "FG_PROPELLER" && P_Factor > 0.001) {
+ ((FGPropeller*)Thruster)->SetPFactor(P_Factor);
+ if (debug_lvl > 0) cout << " P-Factor: " << P_Factor << endl;
+ ((FGPropeller*)Thruster)->SetSense(fabs(Sense)/Sense);
+ if (debug_lvl > 0) cout << " Sense: " << Sense << endl;
+ }
+ Thruster->SetdeltaT(State->Getdt() * Propulsion->GetRate());
+ return true;
+ } else {
+
+ cerr << "Could not read thruster config file: " << fullpath
+ + thrusterFileName + ".xml" << endl;
+ return false;
+ }
+
+}
+
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// The bitmasked value choices are as follows:
// unset: In this case (the default) JSBSim would only print
projects / flightgear.git / blobdiff