Utility.h

#ifndef UTILITY_
#define UTILITY_

#include <stdio.h>
#include <windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

#include "Geometry.h"

class Utility
{
public:
        static void DrawQuad (const Point& p1, const Point& p2, const Point& p3, const Point& p4);

        static void DrawBoundingBox (BoundingBox bounding_box);

        static void SetColor (float red, float green, float blue, float alpha);

        static Point GetPointFromBox (const BoundingBox & box, int index);

private:
        static float color[4];
};

#endif

---