#include <simgear/compiler.h>
-#ifdef SG_HAVE_STD_INCLUDES
-# include <cmath>
-#else
-# ifdef SG_MATH_EXCEPTION_CLASH
-# define exception C_exception
-# endif
-# include <math.h>
-#endif
+#include <cmath>
+
#include <plib/sg.h>
* 6378.165 but this is probably close enough */
#define SG_EARTH_RAD 6378.155
+// Maximum terrain elevation from sea level
+#define SG_MAX_ELEVATION_M 9000.0
// Earth parameters for WGS 84, taken from LaRCsim/ls_constants.h
/** Nautical Miles to Radians */
#define SG_RAD_TO_NM 3437.7467707849392526
-/** Miles per second to Knots */
+/** meters per second to Knots */
#define SG_MPS_TO_KT 1.9438444924406046432
-/** Knots to Miles per second */
+/** Knots to meters per second */
#define SG_KT_TO_MPS 0.5144444444444444444
-/** Miles per second to Miles per hour */
+/** Feet per second to Knots */
+#define SG_FPS_TO_KT 0.5924838012958962841
+
+/** Knots to Feet per second */
+#define SG_KT_TO_FPS 1.6878098571011956874
+
+/** meters per second to Miles per hour */
#define SG_MPS_TO_MPH 2.2369362920544020312
-/** Miles per hour to Miles per second */
+/** meetrs per hour to Miles per second */
#define SG_MPH_TO_MPS 0.44704
/** Meters per second to Kilometers per hour */
#define SG_MPS_TO_KMH 3.6
-/** Kilometers per hour to Miles per second */
+/** Kilometers per hour to meters per second */
#define SG_KMH_TO_MPS 0.2777777777777777778
/** Pascal to Inch Mercury */