115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
/*******************************************************************************
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Header: FGAtmosphere.h
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Author: Jon Berndt
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Implementation of 1959 Standard Atmosphere added by Tony Peden
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Date started: 11/24/98
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------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA.
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Further information about the GNU General Public License can also be found on
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the world wide web at http://www.gnu.org.
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HISTORY
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--------------------------------------------------------------------------------
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11/24/98 JSB Created
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07/23/99 TP Added implementation of 1959 Standard Atmosphere
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Moved calculation of Mach number to FGTranslation
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********************************************************************************
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SENTRY
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*******************************************************************************/
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#ifndef FGAtmosphere_H
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#define FGAtmosphere_H
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/*******************************************************************************
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INCLUDES
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*******************************************************************************/
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#include "FGModel.h"
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#include "FGMatrix.h"
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/*******************************************************************************
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COMMENTS, REFERENCES, and NOTES
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********************************************************************************
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[1] Anderson, John D. "Introduction to Flight, Third Edition", McGraw-Hill,
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1989, ISBN 0-07-001641-0
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*******************************************************************************
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CLASS DECLARATION
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*******************************************************************************/
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class FGAtmosphere : public FGModel {
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public:
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FGAtmosphere(FGFDMExec*);
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~FGAtmosphere(void);
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bool Run(void);
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inline float GetTemperature(void) {return temperature;}
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inline float GetDensity(void) {return density;} // use only after Run() has been called
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inline float GetPressure(void) {return pressure;}
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inline float GetSoundSpeed(void) {return soundspeed;}
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inline float GetTemperatureSL(void) { return SLtemperature; } //Rankine, altitude in feet
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inline float GetDensitySL(void) { return SLdensity; } //slugs/ft^3
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inline float GetPressureSL(void) { return SLpressure; } //lbs/ft^2
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inline float GetSoundSpeedSL(void) { return SLsoundspeed; } //ft/s
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inline float GetTemperatureRatio(void) { return temperature/SLtemperature; }
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inline float GetDensityRatio(void) { return density/SLdensity; }
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inline float GetPressureRatio(void) { return pressure/SLpressure; }
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inline float GetSoundSpeedRatio(void) { return soundspeed/SLsoundspeed; }
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inline void UseExternal(void) { useExternal=true; }
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inline void UseInternal(void) { useExternal=false; } //this is the default
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inline void SetExTemperature(float t) { exTemperature=t; }
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inline void SetExDensity(float d) { exDensity=d; }
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inline void SetExPressure(float p) { exPressure=p; }
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inline void SetWindNED(float wN, float wE, float wD) { vWindNED(1)=wN; vWindNED(2)=wE; vWindNED(3)=wD;}
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inline float GetWindN(void) { return vWindNED(1); }
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inline float GetWindE(void) { return vWindNED(2); }
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inline float GetWindD(void) { return vWindNED(3); }
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inline FGColumnVector GetWindUVW(void) { return vWindUVW; }
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protected:
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private:
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float rho;
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float h;
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float SLtemperature,SLdensity,SLpressure,SLsoundspeed;
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float temperature,density,pressure,soundspeed;
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bool useExternal;
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float exTemperature,exDensity,exPressure;
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FGColumnVector vWindNED,vWindUVW;
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void Calculate(float altitude);
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};
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/******************************************************************************/
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#endif
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