MathUtil.h

#pragma once

#include <time.h>
#include <stdlib.h>
#include <math.h>
#include "defines.h"


#define ZAK_PI                  3.1415926535897932384626433832795
#define DegreeToRad(n)  n*0.017453292519943295769236907684886
#define RadToDegree(n)  n*57.295779513082320876798154814105
#define ZAK_MAX_RAND    180000

namespace zak {

class ZAKENGINE_API MathUtil {

public:
        static float ATan(float tan);

        static float ACos(float cos);

        static float ASin(float sin);

        static float Sin(float degree);

        static float Cos(float degree);

        static float Tan(float degree);

        static void SinCos(float degree, float *sine, float *cosine);

        static int Random() {
                _randIndex++;

                if (_randIndex >= ZAK_MAX_RAND) {
                        _randIndex = 0;
                }

                return _rand[_randIndex];
        }

        static float DistanceQuad (float x1, float y1, float x2, float y2) { return ((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); }

        static float Distance     (float x1, float y1, float x2, float y2) { return sqrt(((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))); }

        static float Round (float num);

private:
        static bool Initialize();
        static void Shutdown() {
                if (_rand)
                        delete [] _rand;
        }

        static void SinCosCalc(float degree, float *sine, float *cosine);
        static float _sin[360];
        static float _cos[360];
        static float _tan[360];
        static int *_rand;
        static int _randIndex;

        friend class Game;
};

};

---