#define?FREEGLUT_STATIC
#define?GLUT_DISABLE_ATEXIT_HACK
#include?
#include?
#include?
#include?
#include?
using?namespace?std;

#ifdef?_DEBUG
#pragma?comment（lib?“freeglut_staticd.lib“）
#else
#pragma?comment（lib?“freeglut_static.lib“）
#endif

#define?WIDTH?500
#define?HEIGHT?500


GLfloat?eyex?=?3?eyey?=?2?eyez?=?28;
GLfloat?centerx?=?3?centery?=?2?centerz?=?0;
GLfloat?upx?=?0?upy?=?1?upz?=?0;
void?DrawMaze（）;

GLfloat?vectorx?=?centerx?-?eyex;
GLfloat?vectory?=?centery?-?eyey;
GLfloat?vectorz?=?centerz?-?eyez;
GLdouble?vectorlen?=?sqrt（vectorx*vectorx?+?vectory*vectory?+?vectorz*vectorz）;

GLfloat?WalkPace?=?0.2;
GLfloat?OFFSET?=?0.5;
static?float?Theta?=?0.02;//每次旋轉5度
GLdouble?cosTheta?=?cos（Theta）;
GLdouble?sinTheta?=?sin（Theta）;
const?int?block_size?=?2;
const?int?map_size?=?7;
int?map[49]?=?{?\
1?1?1?1?1?1?1?\
1?0?0?0?0?0?1?\
1?0?0?0?0?0?1?\
1?1?1?1?0?0?1?\
1?0?0?0?0?0?1?\
1?0?0?0?0?0?1?\
1?0?0?1?1?1?1??\
};

void?keyboard（unsigned?char?key?int?x?int?y）?{
	GLfloat?tmpCenterx?=?centerx?tmpCentery?=?centery?tmpCenterz?=?centerz;
	GLfloat?tmpEyex?=?eyex?tmpEyey?=?eyey?tmpEyez?=?eyez;
	switch?（key）????{
	case?‘w‘:case?‘W‘:?{
		centerx?+=?vectorx*WalkPace?/?vectorlen;
		centerz?+=?vectorz*WalkPace?/?vectorlen;
		eyex?=?centerx?-?vectorx;
		eyez?=?centerz?-?vectorz;
		if?（（eyex>-1?&&?eyex?-1?&&?eyez			//roll?back!
			centerx?=?tmpCenterx;?centerz?=?tmpCenterz;
			eyez?=?tmpEyez;?eyex?=?tmpEyex;
		}
		break;
	}
	case?‘s‘:?case?‘S‘:?{
		centerx?-=?vectorx*WalkPace?/?vectorlen;
		centerz?-=?vectorz*WalkPace?/?vectorlen;
		eyex?=?centerx?-?vectorx;
		eyez?=?centerz?-?vectorz;
		if?（（eyex>-1?&&?eyex?-1?&&?eyez			//roll?back!
			centerx?=?tmpCenterx;?centerz?=?tmpCenterz;
			eyez?=?tmpEyez;?eyex?=?tmpEyex;
		}
		break;
	}
	case?‘d‘:?case?‘D‘:?{
		GLfloat?tx?tz;
		tx?=?-vectorz;?tz?=?vectorx;
		centerx?+=?tx*WalkPace?/?vectorlen;
		centerz?+=?tz*?WalkPace?/?vectorlen;
		eyex?=?centerx?-?vectorx;
		eyez?=?centerz?-?vectorz;
		if?（（eyex>-1?&&?eyex?-1?&&?eyez			//roll?back!
			centerx?=?tmpCenterx;?centerz?=?tmpCenterz;
			eyez?=?tmpEyez;?eyex?=?tmpEyex;
		}
		break;
	}
	case?‘a(chǎn)‘:case?‘A‘:{
		GLfloat?tx?tz;
		tx?=?vectorz;?tz?=?-vectorx;
		centerx?+=?tx*WalkPace?/?vectorlen;
		centerz?+=?tz*?WalkPace?/?vectorlen;
		eyex?=?centerx?-?vectorx;
		eyez?=?centerz?-?vectorz;
		if?（（eyex>-1?&&?eyex?