#ifdef __sgi
#include <glut.h>	/* SGI glut libs */
#else
#ifdef __MWERKS__
#include <glut.h>	/* MacOS 9 glut libs */
#else
#ifdef __LINUX
//#include <GL/glut.h>
#else
#ifdef __OSX
#include <GLUT/glut.h>	/*OS X glut libs */
#else
#include<gl\glut.h>    /* Windows glut libs */
#endif
#endif
#endif