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blacklib/include/blackcore/constants.h

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+//! Copyright (C) 2013 Roland Winklmeier
+//! This Source Code Form is subject to the terms of the Mozilla Public
+//! License, v. 2.0. If a copy of the MPL was not distributed with this
+//! file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+#ifndef CONSTANTS_H
+#define CONSTANTS_H
+
+#include "math.h"
+
+namespace BlackCore
+{
+	namespace Constants
+	{
+		//! Conversion from Degree to Radians
+		const double DegToRad = 4.0 * atan(1.0) / 180.0;
+		
+		//! Conversion from Radians to Degree
+		const double RadToDeg = 180.0 / (4.0 * atan(1.0));
+		
+		//! Mathematical constant Pi
+		const double PI = 4.0 * atan(1.0);
+		
+		//! 2 * Pi
+		const double TwoPI	= 2.0 * PI;
+
+		//! Conversion from feet to meter
+		const double FeetToMeter = 0.3048;
+		
+		//! Conversion from meter to feed
+		const double MeterToFeet = 3.28084;
+		
+		//! Conversion from knots to meter/second
+		const double KnotsToMeterPerSecond = 0.5144444444;
+		
+		//! Equatorial radius of WGS84 ellipsoid (6378137 m)
+		const double EarthRadius = 6378137.0;
+		
+		//! Flattening of WGS84 ellipsoid (1/298.257223563).
+		const double Flattening = 1/298.257223563;
+
+		//! First eccentricity squared
+		const double e2 = (Flattening * (2 - Flattening));
+		
+		//! First eccentricity to the power of four
+		const double e4 = CMath::square(e2);
+		
+		const double e2m = CMath::square(1 - Flattening);
+		
+		const double e2absolute = abs(e2);
+	}
+
+} // namespace BlackCore
+
+#endif // CONSTANTS_H