#include <simgear/constants.h>
-#include <osg/Matrix>
-
// #define SG_GEOD_NATIVE_DEGREE
/// Class representing a geodetic location
/// Set the geodetic elevation from the argument given in feet
void setElevationFt(double elevation);
- // Create a local coordinate frame in the earth-centered frame of
- // reference. X points north, Z points down.
- // makeSimulationFrameRelative() only includes rotation.
-
- osg::Matrix makeSimulationFrameRelative();
- osg::Matrix makeSimulationFrame();
-
- // Create a Z-up local coordinate frame in the earth-centered frame
- // of reference. This is what scenery models, etc. expect.
- // makeZUpFrameRelative() only includes rotation.
- osg::Matrix makeZUpFrameRelative();
- osg::Matrix makeZUpFrame();
+ /// Compare two geodetic positions for equality
+ bool operator == ( const SGGeod & other ) const;
+
+ /// check the Geod contains sane values (finite, inside appropriate
+ /// ranges for lat/lon)
+ bool isValid() const;
private:
/// This one is private since construction is not unique if you do
/// not know the units of the arguments. Use the factory methods for
/// that purpose
SGGeod(double lon, double lat, double elevation);
- /// The actual data, angles in degree, elevation in meters
+ //// FIXME: wrong comment!
+ /// The actual data, angles in degrees, elevation in meters
/// The rationale for storing the values in degrees is that most code places
/// in flightgear/terragear use degrees as a nativ input and output value.
/// The places where it makes sense to use radians is when we convert
_elevation = elevation*SG_FEET_TO_METER;
}
+inline
+bool
+SGGeod::operator == ( const SGGeod & other ) const
+{
+ return _lon == other._lon &&
+ _lat == other._lat &&
+ _elevation == other._elevation;
+}
+
+inline
+bool
+SGGeod::isValid() const
+{
+ if (SGMiscd::isNaN(_lon))
+ return false;
+ if (SGMiscd::isNaN(_lat))
+ return false;
+#ifdef SG_GEOD_NATIVE_DEGREE
+ return (_lon >= -180.0) && (_lon <= 180.0) &&
+ (_lat >= -90.0) && (_lat <= 90.0);
+#else
+ return (_lon >= -SGD_PI) && (_lon <= SGD_PI) &&
+ (_lat >= -SGD_PI_2) && (_lat <= SGD_PI_2);
+#endif
+}
+
/// Output to an ostream
template<typename char_type, typename traits_type>
inline