Check return value of FDM::init().

[flightgear.git] / src / FDM / JSBSim / FGAtmosphere.h

diff --git a/src/FDM/JSBSim/FGAtmosphere.h b/src/FDM/JSBSim/FGAtmosphere.h
index a698742c81d0553029dedb9178dd7bf5725fd5df..678c1761e8b3e3052aeee47ef9879436f8f4dcae 100644 (file)
--- a/src/FDM/JSBSim/FGAtmosphere.h
+++ b/src/FDM/JSBSim/FGAtmosphere.h
@@ -1,75 +1,117 @@
 /*******************************************************************************
-
+ 
  Header:       FGAtmosphere.h
  Author:       Jon Berndt
+               Implementation of 1959 Standard Atmosphere added by Tony Peden
  Date started: 11/24/98
-
+ 
  ------------- 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.
-
+ 
 HISTORY
 --------------------------------------------------------------------------------
 11/24/98   JSB   Created
-
+07/23/99   TP   Added implementation of 1959 Standard Atmosphere
+           Moved calculation of Mach number to FGTranslation
+ 
+ 
 ********************************************************************************
 SENTRY
 *******************************************************************************/
 
-#ifndef FGATMOSPHERE_H
-#define FGATMOSPHERE_H
+#ifndef FGAtmosphere_H
+#define FGAtmosphere_H
 
 /*******************************************************************************
 INCLUDES
 *******************************************************************************/
 
 #include "FGModel.h"
+#include "FGMatrix.h"
+
+#define ID_ATMOSPHERE "$Header$"
 
 /*******************************************************************************
 COMMENTS, REFERENCES,  and NOTES
-*******************************************************************************/
-/**
-The equation used in this model was determined by a third order curve fit using
-Excel. The data is from the ICAO atmosphere model.
-@memo Models the atmosphere.
-@author Jon S. Berndt
-*/
-/*******************************************************************************
+********************************************************************************
+ 
+[1]    Anderson, John D. "Introduction to Flight, Third Edition", McGraw-Hill,
+      1989, ISBN 0-07-001641-0
+ 
+*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
 
-using namespace std;
-
-class FGAtmosphere : public FGModel
-{
+class FGAtmosphere : public FGModel {
 public:
+
   FGAtmosphere(FGFDMExec*);
   ~FGAtmosphere(void);
   bool Run(void);
 
-  inline float Getrho(void) {return rho;}
-  float CalcRho(float altitude);
+  inline float GetTemperature(void) {return temperature;}
+  inline float GetDensity(void)    {return density;}     // use only after Run() has been called
+  inline float GetPressure(void)   {return pressure;}
+  inline float GetSoundSpeed(void) {return soundspeed;}
+
+  inline float GetTemperatureSL(void) { return SLtemperature; }  //Rankine, altitude in feet
+  inline float GetDensitySL(void)     { return SLdensity; }      //slugs/ft^3
+  inline float GetPressureSL(void)    { return SLpressure; }     //lbs/ft^2
+  inline float GetSoundSpeedSL(void)  { return SLsoundspeed; }   //ft/s
+
+  inline float GetTemperatureRatio(void)  { return temperature/SLtemperature; }
+  inline float GetDensityRatio(void)     { return density/SLdensity; }
+  inline float GetPressureRatio(void)     { return pressure/SLpressure; }
+  inline float GetSoundSpeedRatio(void)   { return soundspeed/SLsoundspeed; }
+
+  inline void UseExternal(void)          { useExternal=true;  }
+  inline void UseInternal(void)          { useExternal=false; } //this is the default
+
+  inline void SetExTemperature(float t)  { exTemperature=t; }
+  inline void SetExDensity(float d)      { exDensity=d; }
+  inline void SetExPressure(float p)     { exPressure=p; }
+
+  inline void SetWindNED(float wN, float wE, float wD) { vWindNED(1)=wN; vWindNED(2)=wE; vWindNED(3)=wD;}
+
+  inline float GetWindN(void) { return vWindNED(1); }
+  inline float GetWindE(void) { return vWindNED(2); }
+  inline float GetWindD(void) { return vWindNED(3); }
+
+  inline FGColumnVector GetWindUVW(void) { return vWindUVW; }
 
 protected:
 
 private:
   float rho;
+
+  float h;
+  float SLtemperature,SLdensity,SLpressure,SLsoundspeed;
+  float temperature,density,pressure,soundspeed;
+  bool useExternal;
+  float exTemperature,exDensity,exPressure;
+  FGColumnVector vWindNED,vWindUVW;
+
+  void Calculate(float altitude);
+
 };
 
+
+
 /******************************************************************************/
 #endif