initial version

geo/Angle.h

@@ -0,0 +1,33 @@
+#ifndef ANGLE_H
+#define ANGLE_H
+
+#include <cmath>
+
+class Angle {
+
+public:
+
+	/** get the radians from (x1,y1) to (x2,y2) */
+	static float getRAD(const float x1, const float y1, const float x2, const float y2) {
+		const float tmp = std::atan2(y2-y1, x2-x1);
+		return (tmp < 0) ? (tmp + 2*M_PI) : (tmp);
+	}
+
+	/** get the degrees from (x1,y1) to (x2,y2) */
+	static float getDEG(const float x1, const float y1, const float x2, const float y2) {
+		return radToDeg(getRAD(x1,y1,x2,y2));
+	}
+
+	/** convert degrees to radians */
+	static float degToRad(const float deg) {
+		return deg / 180 * M_PI;
+	}
+
+	/** convert radians to degrees */
+	static float radToDeg(const float rad) {
+		return rad * 180 / M_PI;
+	}
+
+};
+
+#endif // ANGLE_H