INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+#include <float.h>
+
#ifdef FGFS
# include <simgear/compiler.h>
# include <math.h>
SG_USING_STD(string);
-# ifndef M_PI
-# include <simgear/constants.h>
-# define M_PI SG_PI
-# endif
+# ifndef M_PI
+# include <simgear/constants.h>
+# define M_PI SG_PI
+# endif
-#else
+#else // JSBSim section
# include <queue>
# include <string>
using std::string;
-# ifndef M_PI
-# define M_PI 3.14159265358979323846
-# endif
+# if defined(_MSC_VER) && _MSC_VER <= 1200
+# ifndef max
+# define max(a,b) (((a) > (b)) ? (a) : (b))
+# endif
-#endif
+# ifndef min
+# define min(a,b) (((a) < (b)) ? (a) : (b))
+# endif
+# else
-#if !defined(WIN32) || defined(__GNUC__)
-using std::max;
-#endif
+using std::fabs;
-#ifdef __FreeBSD__ // define gcvt on FreeBSD
+# endif
-#include <stdio.h>
+# ifndef M_PI
+# define M_PI 3.14159265358979323846
+# endif
-static char *gcvt(double number, size_t ndigit, char *buf)
-{
- sprintf(buf, "%f", number);
- return buf;
-}
+#endif
+
+#if !defined(WIN32) || defined(__GNUC__)
+using std::max;
#endif
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
/** JSBSim Base class.
+* This class provides universal constants, utility functions, messaging
+* functions, and enumerated constants to JSBSim.
@author Jon S. Berndt
@version $Id$
*/
class FGJSBBase {
public:
/// Constructor for FGJSBBase.
- FGJSBBase();
+ FGJSBBase() {};
/// Destructor for FGJSBBase.
- virtual ~FGJSBBase() {};
+ ~FGJSBBase() {};
/// JSBSim Message structure
typedef struct Msg {
double dVal;
} Message;
- ///@name JSBSim Enums.
- //@{
- /// Moments L, M, N
- enum {eL = 1, eM, eN };
- /// Rates P, Q, R
- enum {eP = 1, eQ, eR };
- /// Velocities U, V, W
- enum {eU = 1, eV, eW };
- /// Positions X, Y, Z
- enum {eX = 1, eY, eZ };
- /// Euler angles Phi, Theta, Psi
- enum {ePhi = 1, eTht, ePsi };
- /// Stability axis forces, Drag, Side force, Lift
- enum {eDrag = 1, eSide, eLift };
- /// Local frame orientation Roll, Pitch, Yaw
- enum {eRoll = 1, ePitch, eYaw };
- /// Local frame position North, East, Down
- enum {eNorth = 1, eEast, eDown };
- //@}
-
///@name JSBSim console output highlighting terms.
//@{
/// highlights text
/** 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(string text);
+ Message* 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(string text, bool bVal);
+ Message* 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(string text, int iVal);
+ Message* 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(string text, double dVal);
+ Message* 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 pointer to a Message structure (or NULL if no mesage) */
Message* ProcessMessage(void);
//@}
+
+ /** Returns the version number of JSBSim.
+ * @return The version number of JSBSim. */
string GetVersion(void) {return JSBSim_version;}
-
+
+ /// Disables highlighting in the console output.
void disableHighLighting(void);
static short debug_lvl;
- double KelvinToFahrenheit (double kelvin) {
+
+ /** Converts from degrees Kelvin to degrees Fahrenheit.
+ * @param kelvin The temperature in degrees Kelvin.
+ * @return The temperature in Fahrenheit. */
+ static double KelvinToFahrenheit (double kelvin) {
return 1.8*kelvin - 459.4;
}
- double RankineToCelsius (double rankine) {
+ /** Converts from degrees Rankine to degrees Celsius.
+ * @param rankine The temperature in degrees Rankine.
+ * @return The temperature in Celsius. */
+ static double RankineToCelsius (double rankine) {
return (rankine - 491.67)/1.8;
}
+ /** Converts from degrees Fahrenheit to degrees Celsius.
+ * @param fahrenheit The temperature in degrees Fahrenheit.
+ * @return The temperature in Celsius. */
+ static double FahrenheitToCelsius (double fahrenheit) {
+ return (fahrenheit - 32.0)/1.8;
+ }
+
+ /** Converts from degrees Celsius to degrees Fahrenheit.
+ * @param celsius The temperature in degrees Celsius.
+ * @return The temperature in Fahrenheit. */
+ static double CelsiusToFahrenheit (double celsius) {
+ return celsius * 1.8 + 32.0;
+ }
+
+ /** Finite precision comparison.
+ @param a first value to compare
+ @param b second value to compare
+ @return if the two values can be considered equal up to roundoff */
+ static bool EqualToRoundoff(double a, double b) {
+ double eps = 2.0*DBL_EPSILON;
+ return fabs(a - b) <= eps*max(fabs(a), fabs(b));
+ }
+
+ /** Finite precision comparison.
+ @param a first value to compare
+ @param b second value to compare
+ @return if the two values can be considered equal up to roundoff */
+ static bool EqualToRoundoff(float a, float b) {
+ float eps = 2.0*FLT_EPSILON;
+ return fabs(a - b) <= eps*max(fabs(a), fabs(b));
+ }
+
+ /** Finite precision comparison.
+ @param a first value to compare
+ @param b second value to compare
+ @return if the two values can be considered equal up to roundoff */
+ static bool EqualToRoundoff(float a, double b) {
+ return EqualToRoundoff(a, (float)b);
+ }
+
+ /** Finite precision comparison.
+ @param a first value to compare
+ @param b second value to compare
+ @return if the two values can be considered equal up to roundoff */
+ static bool EqualToRoundoff(double a, float b) {
+ return EqualToRoundoff((float)a, b);
+ }
+
protected:
static Message localMsg;
-
+
static std::queue <Message*> Messages;
- virtual void Debug(int from) {};
+ void Debug(int from) {};
static unsigned int frame;
static unsigned int messageId;
-
+
static const double radtodeg;
static const double degtorad;
static const double hptoftlbssec;
static const double psftoinhg;
+ static const double psftopa;
static const double fpstokts;
static const double ktstofps;
static const double inchtoft;
static const double in3tom3;
- static const double Reng; // Specific Gas Constant,ft^2/(sec^2*R)
+ 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 string needed_cfg_version;
static const string JSBSim_version;
+
+public:
+/// Moments L, M, N
+enum {eL = 1, eM, eN };
+/// Rates P, Q, R
+enum {eP = 1, eQ, eR };
+/// Velocities U, V, W
+enum {eU = 1, eV, eW };
+/// Positions X, Y, Z
+enum {eX = 1, eY, eZ };
+/// Euler angles Phi, Theta, Psi
+enum {ePhi = 1, eTht, ePsi };
+/// Stability axis forces, Drag, Side force, Lift
+enum {eDrag = 1, eSide, eLift };
+/// Local frame orientation Roll, Pitch, Yaw
+enum {eRoll = 1, ePitch, eYaw };
+/// Local frame position North, East, Down
+enum {eNorth = 1, eEast, eDown };
+/// Locations Radius, Latitude, Longitude
+enum {eLat = 1, eLong, eRad };
+/// Conversion specifiers
+enum {inNone = 0, inDegrees, inRadians, inMeters, inFeet };
+
};
+
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#endif