------------- Copyright (C) 2001 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
+ the terms of the GNU Lesser 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
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
- You should have received a copy of the GNU General Public License along with
+ You should have received a copy of the GNU Lesser 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
+ Further information about the GNU Lesser General Public License can also be found on
the world wide web at http://www.gnu.org.
HISTORY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include <float.h>
-
-#ifdef FGFS
-# include <simgear/compiler.h>
-# include <math.h>
-# include <queue>
-# include STL_STRING
-
-SG_USING_STD(string);
-
-# ifndef M_PI
-# include <simgear/constants.h>
-# define M_PI SG_PI
-# endif
-
-#else // JSBSim section
-
-# include <queue>
-# include <string>
-# if defined(sgi) && !defined(__GNUC__)
-# include <math.h>
-# else
-# include <cmath>
-# endif
-
-using std::string;
-
-# if defined(_MSC_VER) && _MSC_VER <= 1200
-# ifndef max
-# define max(a,b) (((a) > (b)) ? (a) : (b))
-# endif
-
-# ifndef min
-# define min(a,b) (((a) < (b)) ? (a) : (b))
-# endif
-# else
+#include <queue>
+#include <string>
+#include <sstream>
+#include <cmath>
using std::fabs;
+using std::string;
-# endif
-
-# ifndef M_PI
-# define M_PI 3.14159265358979323846
-# endif
-
+#ifndef M_PI
+# define M_PI 3.14159265358979323846
#endif
-#if !defined(WIN32) || defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 1400))
-using std::max;
+#if !defined(WIN32) || defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 1300))
+ using std::max;
#endif
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
~FGJSBBase() {};
/// JSBSim Message structure
- typedef struct Msg {
+ class Message {
+ public:
unsigned int fdmId;
unsigned int messageId;
string text;
bool bVal;
int iVal;
double dVal;
- } Message;
+ };
+
+ /// First order, (low pass / lag) filter
+ class Filter {
+ double prev_in;
+ double prev_out;
+ double ca;
+ double cb;
+ public: Filter(void) {}
+ public: Filter(double coeff, double dt) {
+ prev_in = prev_out = 0.0;
+ double denom = 2.0 + coeff*dt;
+ ca = coeff*dt/denom;
+ cb = (2.0 - coeff*dt)/denom;
+ }
+ public: double execute(double in) {
+ double out = (in + prev_in)*ca + prev_out*cb;
+ prev_in = in;
+ prev_out = out;
+ return out;
+ }
+ };
///@name JSBSim console output highlighting terms.
//@{
/** Places a Message structure on the Message queue.
@param msg pointer to a Message structure
@return pointer to a Message structure */
- Message* PutMessage(Message* msg);
+void PutMessage(const Message& msg);
/** Creates a message with the given text and places it on the queue.
@param text message text
@return pointer to a Message structure */
- Message* PutMessage(const string& text);
+ void PutMessage(const string& text);
/** Creates a message with the given text and boolean value and places it on the queue.
@param text message text
@param bVal boolean value associated with the message
@return pointer to a Message structure */
- Message* PutMessage(const string& text, bool bVal);
+void PutMessage(const string& text, bool bVal);
/** Creates a message with the given text and integer value and places it on the queue.
@param text message text
@param iVal integer value associated with the message
@return pointer to a Message structure */
- Message* PutMessage(const string& text, int iVal);
+void PutMessage(const string& text, int iVal);
/** Creates a message with the given text and double value and places it on the queue.
@param text message text
@param dVal double value associated with the message
@return pointer to a Message structure */
- Message* PutMessage(const string& text, double dVal);
+void PutMessage(const string& text, double dVal);
/** Reads the message on the queue (but does not delete it).
- @return pointer to a Message structure (or NULL if no mesage) */
- Message* ReadMessage(void);
+ @return 1 if some messages */
+ int SomeMessages(void);
/** Reads the message on the queue and removes it from the queue.
@return pointer to a Message structure (or NULL if no mesage) */
Message* ProcessMessage(void);
return 1.8*kelvin - 459.4;
}
+ /** Converts from degrees Celsius to degrees Rankine.
+ * @param celsius The temperature in degrees Celsius.
+ * @return The temperature in Rankine. */
+ static double CelsiusToRankine (double celsius) {
+ return celsius * 1.8 + 491.67;
+ }
+
/** Converts from degrees Rankine to degrees Celsius.
* @param rankine The temperature in degrees Rankine.
* @return The temperature in Celsius. */
return (rankine - 491.67)/1.8;
}
+ /** Converts from degrees Kelvin to degrees Rankine.
+ * @param kelvin The temperature in degrees Kelvin.
+ * @return The temperature in Rankine. */
+ static double KelvinToRankine (double kelvin) {
+ return kelvin * 1.8;
+ }
+
+ /** Converts from degrees Rankine to degrees Kelvin.
+ * @param rankine The temperature in degrees Rankine.
+ * @return The temperature in Kelvin. */
+ static double RankineToKelvin (double rankine) {
+ return rankine/1.8;
+ }
+
/** Converts from degrees Fahrenheit to degrees Celsius.
* @param fahrenheit The temperature in degrees Fahrenheit.
* @return The temperature in Celsius. */
return celsius * 1.8 + 32.0;
}
+ /** Converts from degrees Celsius to degrees Kelvin
+ * @param celsius The temperature in degrees Celsius.
+ * @return The temperature in Kelvin. */
+ static double CelsiusToKelvin (double celsius) {
+ return celsius + 273.15;
+ }
+
+ /** Converts from degrees Kelvin to degrees Celsius
+ * @param celsius The temperature in degrees Kelvin.
+ * @return The temperature in Celsius. */
+ static double KelvinToCelsius (double kelvin) {
+ return kelvin - 273.15;
+ }
+
/** Finite precision comparison.
@param a first value to compare
@param b second value to compare
static bool EqualToRoundoff(double a, float b) {
return EqualToRoundoff((float)a, b);
}
+
+ /** Constrain a value between a minimum and a maximum value.
+ */
+ static double Constrain(double min, double value, double max) {
+ return value<min?(min):(value>max?(max):(value));
+ }
protected:
static Message localMsg;
- static std::queue <Message*> Messages;
+ static std::queue <Message> Messages;
void Debug(int from) {};
- static unsigned int frame;
static unsigned int messageId;
static const double radtodeg;
static const double ktstofps;
static const double inchtoft;
static const double in3tom3;
+ static const double m3toft3;
+ static const double inhgtopa;
+ static const double fttom;
static double Reng; // Specific Gas Constant,ft^2/(sec^2*R)
static const double SHRatio;
static const double lbtoslug;
static const double slugtolb;
+ static const double kgtolb;
+ static const double kgtoslug;
static const string needed_cfg_version;
static const string JSBSim_version;
+ static string CreateIndexedPropertyName(string Property, int index)
+ {
+ std::stringstream str;
+ str << index;
+ string tmp;
+ str >> tmp;
+ return Property + "[" + tmp + "]";
+ }
+
public:
/// Moments L, M, N
enum {eL = 1, eM, eN };
projects / flightgear.git / blobdiff