SG_ namespace.

[simgear.git] / simgear / constants.h

diff --git a/simgear/constants.h b/simgear/constants.h
index 3558b1215e9d678a2d8a83f25ae7120b2491039d..12345c14746f07e73811fccfcde9431a286bd153 100644 (file)
--- a/simgear/constants.h
+++ b/simgear/constants.h
@@ -69,75 +69,49 @@
 #  define M_E     2.7182818284590452354
 #endif
 
-// ONE_SECOND is pi/180/60/60, or about 100 feet at earths' equator
-#define ONE_SECOND 4.848136811E-6
+// SG_ONE_SECOND is pi/180/60/60, or about 100 feet at earths' equator
+#define SG_ONE_SECOND 4.848136811E-6
 
 
 // Radius of Earth in kilometers at the equator.  Another source had
 // 6378.165 but this is probably close enough
-#define EARTH_RAD 6378.155
+#define SG_EARTH_RAD 6378.155
 
 
 // Earth parameters for WGS 84, taken from LaRCsim/ls_constants.h
 
 // Value of earth radius from [8]
-#define EQUATORIAL_RADIUS_FT 20925650.    // ft
-#define EQUATORIAL_RADIUS_M   6378138.12  // meter
+#define SG_EQUATORIAL_RADIUS_FT 20925650.    // ft
+#define SG_EQUATORIAL_RADIUS_M   6378138.12  // meter
 // Radius squared
-#define RESQ_FT 437882827922500.          // ft
-#define RESQ_M   40680645877797.1344      // meter
-
-#if 0
-// Value of earth flattening parameter from ref [8] 
-//
-//      Note: FP = f
-//            E  = 1-f
-//            EPS = sqrt(1-(1-f)^2)
-//
-
-#define FP    0.003352813178
-#define E     0.996647186
-#define EPS   0.081819221
-#define INVG  0.031080997
-
-// Time Related Parameters
-
-#define MJD0  2415020.0
-#define J2000 (2451545.0 - MJD0)
-#define SIDRATE         .9972695677
-#endif
+#define SG_EQ_RAD_SQUARE_FT 437882827922500.          // ft
+#define SG_EQ_RAD_SQUARE_M   40680645877797.1344      // meter
 
 // Conversions
 
-// Degrees to Radians
-#define DEG_TO_RAD       0.017453292          // deg*pi/180 = rad
-
-// Radians to Degrees
-#define RAD_TO_DEG       57.29577951          // rad*180/pi = deg
-
 // Arc seconds to radians                     // (arcsec*pi)/(3600*180) = rad
-#define ARCSEC_TO_RAD    4.84813681109535993589e-06 
+#define SG_ARCSEC_TO_RAD    4.84813681109535993589e-06 
 
 // Radians to arc seconds                     // (rad*3600*180)/pi = arcsec
-#define RAD_TO_ARCSEC    206264.806247096355156
+#define SG_RAD_TO_ARCSEC    206264.806247096355156
 
 // Feet to Meters
-#define FEET_TO_METER    0.3048
+#define SG_FEET_TO_METER    0.3048
 
 // Meters to Feet
-#define METER_TO_FEET    3.28083989501312335958  
+#define SG_METER_TO_FEET    3.28083989501312335958  
 
 // Meters to Nautical Miles, 1 nm = 6076.11549 feet
-#define METER_TO_NM      0.00053995680
+#define SG_METER_TO_NM      0.00053995680
 
 // Nautical Miles to Meters
-#define NM_TO_METER      1852.0000
+#define SG_NM_TO_METER      1852.0000
 
 // Radians to Nautical Miles, 1 nm = 1/60 of a degree
-#define NM_TO_RAD        0.00029088820866572159
+#define SG_NM_TO_RAD        0.00029088820866572159
 
 // Nautical Miles to Radians
-#define RAD_TO_NM        3437.7467707849392526
+#define SG_RAD_TO_NM        3437.7467707849392526
 
 // For divide by zero avoidance, this will be close enough to zero
 #define SG_EPSILON 0.0000001