Add deg<->rag conversions

libs/geom/include/psemek/geom/constants.hpp

@@ -5,4 +5,16 @@ namespace psemek::geom
 
 	constexpr long double pi = 3.141592653589793238462643383279502884l;
 
+	template <typename T>
+	T deg(T x)
+	{
+		return static_cast<T>((180 * x) / pi);
+	}
+
+	template <typename T>
+	T rad(T x)
+	{
+		return static_cast<T>((x * pi) / 180);
+	}
+
 }