#include <stdlib.h>
#include <math.h>
#include <GL/glut.h>
#include <unistd.h>
#define W 6                       
#define D 6                       
#define CYCLE 600                 
#define GR (D * 0.1)              
#define GD (D * 0.05)             
#define WR (W * 0.6)              
#define SR (W * 0.01)         
#define NG 8                    
#define PAI 3.1415926536
 
int push = 0;
static int r1 = 0, r2 = 0, r3 = 0;
static double a = 0.0,b=0.0;

/*
 *   床を描く
 */
static void myGround(double height){

  const static GLfloat ground[][4] = {   /* 台の色　　　 */
    { 0.6, 0.6, 0.6, 1.0 },
    { 0.3, 0.3, 0.3, 1.0 }
  };

  int i,j;

  glBegin(GL_QUADS);
  glNormal3d(0.0, 1.0, 0.0);
  for (j = -D; j < D; ++j) {
    for (i = -W; i < W; ++i) {
      glMaterialfv(GL_FRONT, GL_DIFFUSE, ground[(i + j) & 1]);
      glVertex3d((GLdouble)i, height, (GLdouble)j);
      glVertex3d((GLdouble)i, height, (GLdouble)(j + 1));
      glVertex3d((GLdouble)(i + 1), height, (GLdouble)(j + 1));
      glVertex3d((GLdouble)(i + 1), height, (GLdouble)j);
    }
  }
  glEnd();
}


/*光源設定*/

/* light1 */
GLfloat light0pos[] = { 0.0, 3.0, 5.0, 1.0 };

/* light2 */
GLfloat light1pos[] = { 5.0, 3.0, 0.0, 1.0 };


/*光源の色設定*/
GLfloat green[] = { 0.2, 0.8, 0.2, 1.0 };
GLfloat red[] = { 0.9, 0.6, 0.6, 1.0 };
GLfloat blue[] = { 0.2, 0.2, 0.4, 1.0 };

void cube(void){
  int i;
  int j;

  glPushMatrix();
  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
  if(push == 0){
    if(++r1 >= 360) r1 = 0;
    if(++r3 >= 360) r3 = 0;
  }else if(push == 1){ 
    if(++r2 >= 360) r2 = 0;
  }else if(push == 2){
    if(++r3 >= 360) r3 = 0;
  }

	else if(push == 3)
	{
     	if(a <= 3.0) a = a + 0.01;
        b = b;
	}

	else if(push == 4)
	{
     	if(a >= -3.0) a = a - 0.01;
	b = b;
	}

	
	else if(push == 5)
	{
     	if(b >= -3.0) b = b - 0.01;
	a=a;
	}
	

	else if(push == 6)
	{
     	if(b <= 3.0) b = b + 0.01;
	a = a;
	}


  glTranslated(0, fabs(3*sin(r3*PAI/72))-3, 0);

glTranslated(a,0.0,b);
  glRotated((double)r1, 0.0, 0.0, 1.0);
  glRotated((double)r2, 0.0, 1.0, 0.0);
  
  glBegin(GL_QUADS);
glutSolidCube(1.0);

  glEnd();
  glPopMatrix();
}

void idle(void)
{
  glutPostRedisplay();
}


/*
 * 画面表示
 */
static void display(void)
{
 /* 光源の位置　　　 */
const static GLfloat lightpos[] = {3.0,4.0,-5.0,1.0};


  int i;

  /* 画面クリア */
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  /* モデルビュー変換行列の初期化 */
  glLoadIdentity();

  /* 視点位置と視線方向 */
  gluLookAt(0.0, 0.0, 10.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

  /* 光源の位置を設定 */
  glLightfv(GL_LIGHT0, GL_POSITION, light0pos);
  

  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
 
  /* 地面の描画 */
  myGround(-(WR + GR + GR));

 /* 図形の回転 */
  cube();

  glutSwapBuffers();
  glFlush();
}

static void resize(int w, int h)
{
  /* ウィンドウ全体をビューポートにする */
  glViewport(0, 0, w, h);

  /* 透視変換行列の指定 */
  glMatrixMode(GL_PROJECTION);

  /* 透視変換行列の初期化 */
  glLoadIdentity();
  gluPerspective(60.0, (double)w / (double)h, 1.0, 100.0);

  /* モデルビュー変換行列の指定 */
  glMatrixMode(GL_MODELVIEW);
}

void mouse(int button, int state, int x, int y)
{
  switch (button) {
  case GLUT_LEFT_BUTTON:
    if (state == GLUT_DOWN) {
      /* アニメーション開始 */
      push = 0;
      glutIdleFunc(idle);
      if(++r1 >= 360) r1 = 0;
    }
    else {
      /* アニメーション停止 */
      glutIdleFunc(0);
    }
    break;
  case GLUT_MIDDLE_BUTTON:
    if (state == GLUT_DOWN) {
      /* アニメーション開始 */
      glutIdleFunc(idle);
      push = 2;
      if(++r3 >= 360) r3 = 0;
    }
    else {
      /* アニメーション停止 */
      glutIdleFunc(0);
    }
    break;

  case GLUT_RIGHT_BUTTON:
    if (state == GLUT_DOWN) {
       /* アニメーション開始 */
      push = 1;
      glutIdleFunc(idle);
      if(++r2 >= 360) r2 = 0;
    }
    else {
      /* アニメーション停止 */
      glutIdleFunc(0);
    }
    break;
  default:
    break;
  }
}

static void keyboard(unsigned char key, int x, int y)
{
		
 switch(key){
	case '\033':	
	exit(0);
	break;

	case 'q':
	exit(0);
	break;

	case 'f'://右	
	push = 3;
        glutIdleFunc(idle);
	break;

	case 'a'://左	
  	push = 4;
        glutIdleFunc(idle);
	break;

	case 'e'://前	
  	push = 5;
        glutIdleFunc(idle);
	break;

	case 'x'://後ろ	
  	push = 6;
        glutIdleFunc(idle);
	break;
	
	default:
	break;
  
 
  }
}

static void init(void)
{
  /* 初期設定 */
  glClearColor(0.2, 0.3, 0.4, 1.0);
}

int main(int argc, char *argv[])
{

  glutInitWindowPosition(100, 100);
  glutInitWindowSize(640, 640);

  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow(argv[0]);
  glutDisplayFunc(display);
  glutReshapeFunc(resize);
  glutMouseFunc(mouse);
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
  glutKeyboardFunc(keyboard);
  init();
  glutMainLoop();
  return 0;
}