#pragma once

#define DEG_TO_RAD(x) x * egm::TAU_1_360;
#define RAD_TO_DEG(x) 

namespace charcoal
{
	// 2PI = TAU: 6.2831853071795864769252867665590

	// 6.28318530717958647693
	const double TAU = 6.28318530717958647693;
	// 5.49778714378213816731
	const double TAU_7_8 = 5.49778714378213816731;
	// 4.71238898038468985769
	const double TAU_3_4 = 4.71238898038468985769;
	// 3.92699081698724154808
	const double TAU_5_8 = 3.92699081698724154808;
	// 3.14159265358979323846
	const double TAU_1_2 = 3.14159265358979323846;
	// 2.35619449019234492885
	const double TAU_3_8 = 2.35619449019234492885;
	// 1.57079632679489661923
	const double TAU_1_4 = 1.57079632679489661923;
	// 0.78539816339744830962
	const double TAU_1_8 = 0.78539816339744830962;
	// 0.01745329251994329577
	const double TAU_1_360 = 0.01745329251994329577;
	// 360 deg / TAU: 
	const double DEG_360_1_TAU = 57.2957795130823208768;

	// Alternate Names
	const double PI_2_1 = TAU;
	const double PI_7_4 = TAU_7_8;
	const double PI_3_2 = TAU_3_4;
	const double PI_5_4 = TAU_5_8;
	const double PI = TAU_1_2;
	const double PI_3_4 = TAU_3_8;
	const double PI_1_2 = TAU_1_4;
	const double PI_1_4 = TAU_1_8;

	inline double radians(double degrees) { return degrees * TAU_1_360; }
	inline double degrees(double radians) { return radians * DEG_360_1_TAU; }
}