#include <GLUT/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#define PI 3.14

static GLfloat Xrot, Xstep;
static GLfloat Yrot, Ystep;
static GLfloat Zrot, Zstep;
static GLfloat Step = 0.5;

/* author - s l reiser */


/* reshape callback */
void reshape (int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode (GL_PROJECTION);
   glLoadIdentity ();
   glOrtho (0.0, (GLdouble) w, 0.0, (GLdouble) h, -500.0, 500.0);
 

   glMatrixMode (GL_MODELVIEW);
}


/* input event - keyboard */
void keyboard(unsigned char key, int x, int y)
{
   switch (key) {
      case 114:
         exit(0);
         break;
   }
}


/* program unique initialiations */
void myinit(void)
{
 
/* attributes */

   glClearColor(0.0, 0.3, 0.50, 0.0); /* blue background */
   glDepthFunc(GL_LEQUAL);
   glEnable(GL_DEPTH_TEST);  	   
 

/* set up viewing */
/* 500 x 500 x 500 window with origin lower left */

   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(0.0, 500.0, 0.0, 500.0, -500.0, 000.0);

   glMatrixMode(GL_MODELVIEW);

}

/* display callback */
void display( void )
{		
   glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);  /*clear the window */
	
   glColor3f(0.0, 1.0, 0.0);
	
   glBegin(GL_TRIANGLE_STRIP);   /* hull */
 	  glVertex3f(100.0,150.0,250.0);  
	  glVertex3f(150.0,150.0,350.0);  
	  glVertex3f(150.0,100.0,250.0);  
	  glVertex3f(350.0,150.0,350.0);
	  glVertex3f(350.0,100.0,250.0);
	  glVertex3f(400.0,150.0,250.0);
   glEnd();

   glBegin(GL_TRIANGLE_STRIP);   /* hull */
	  glVertex3f(400.0,150.0,250.0);  
	  glVertex3f(350.0,150.0,150.0);  
	  glVertex3f(350.0,100.0,250.0);  
	  glVertex3f(150.0,150.0,150.0);
	  glVertex3f(150.0,100.0,250.0);
	  glVertex3f(100.0,150.0,250.0);
   glEnd();

   glColor3f(.8, .8, .8); /* mast */
   glBegin(GL_QUAD_STRIP);
	  glVertex3f(175.0,125.0, 260.0);
	  glVertex3f(175.0,450.0, 260.0);  
	  glVertex3f(190.0,125.0, 260.0);    
	  glVertex3f(190.0,450.0, 260.0);  
	  glVertex3f(190.0,125.0, 240.0);    
	  glVertex3f(190.0,450.0, 240.0);
	  glVertex3f(175.0,125.0, 240.0);
	  glVertex3f(175.0,450.0, 240.0);
	  glVertex3f(175.0,125.0, 260.0);
	  glVertex3f(175.0,450.0, 260.0);  
   glEnd();
	
   glBegin(GL_QUADS);  /*mast end caps */
      glVertex3f(175.0,125.0, 260.0);
	  glVertex3f(190.0,125.0, 260.0);    
	  glVertex3f(190.0,125.0, 240.0);    
	  glVertex3f(175.0,125.0, 240.0);
	  glVertex3f(175.0,450.0, 260.0);  
	  glVertex3f(190.0,450.0, 260.0);  
	  glVertex3f(190.0,450.0, 240.0);
	  glVertex3f(175.0,450.0, 240.0);
   glEnd();
	
   glColor3f(1.0, 1.0, 1.0); /* sail*/
   glBegin(GL_TRIANGLE_FAN);
	  glVertex3f(100.0,200.0, 280.0);
	  glVertex3f(210.0,470.0, 300.0);  
	  glVertex3f(270.0,350.0, 400.0);
	  glVertex3f(300.0,275.0, 430.0);
	  glVertex3f(360.0,200.0, 450.0);  
   glEnd();
    
   glColor3f(1.0, 1.0, 0.0); /* rudder */
   glBegin(GL_QUAD_STRIP);   /* skinny sides */
	  glVertex3i(325,165,248);  
	  glVertex3i(325,165,252);  
	  glVertex3i(425,165,248);  
	  glVertex3i(425,165,252);  
	  glVertex3i(425,155,248);  
	  glVertex3i(425,155,252);  
	  glVertex3i(325,155,248);  
      glVertex3i(325,155,252);
	  glVertex3i(325,165,248);  
	  glVertex3i(325,165,252);  
   glEnd();

   glBegin(GL_QUAD_STRIP);
	  glVertex3i(425,165,248);
	  glVertex3i(425,165,252);
	  glVertex3i(430,100,248);  
	  glVertex3i(430,100,252);  
	  glVertex3i(440, 80,248);  
	  glVertex3i(440, 80,252);  
	  glVertex3i(425, 75,248);  
	  glVertex3i(425, 75,252);  
	  glVertex3i(410, 75,248);  
	  glVertex3i(410, 75,252);  
	  glVertex3i(410,155,248);
  	  glVertex3i(410,155,252);
	  glVertex3i(425,165,248);
	  glVertex3i(425,165,252);
   glEnd();
	
   glBegin(GL_QUADS);		/* large sides */
	  glVertex3i(325,165,248);  
	  glVertex3i(425,165,248);  
	  glVertex3i(425,155,248);  
	  glVertex3i(325,155,248);  
   glEnd();

   glBegin(GL_POLYGON);
	  glVertex3i(425,165,248);
	  glVertex3i(430,100,248);  
	  glVertex3i(440, 80,248);  
	  glVertex3i(425, 75,248);  
	  glVertex3i(410, 75,248);  
	  glVertex3i(410,155,248);
   glEnd();

   glBegin(GL_QUADS);
	  glVertex3i(325,165,252);  
	  glVertex3i(425,165,252);  
	  glVertex3i(425,155,252);  
	  glVertex3i(325,155,252);  
   glEnd();

   glBegin(GL_POLYGON);
	  glVertex3i(425,165,252);
	  glVertex3i(430,100,252);  
	  glVertex3i(440, 80,252);  
	  glVertex3i(425, 75,252);  
	  glVertex3i(410, 75,252);  
	  glVertex3i(410,155,252);
   glEnd();


//	glPopMatrix();  /* go back to saved matrix */

   glFlush(); /* clear buffers */
   glutSwapBuffers();  /* switch buffers */

}

void boatMenu(int value)
{
   switch (value) {
   case 1:
   case 2:
      exit (0);
	  break;
	  }
   glutPostRedisplay();
}

int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);  /* set double buffering */
   glutInitWindowSize (500, 500); 
   glutInitWindowPosition (0, 0);
   glutCreateWindow ("Susan's Sailboat"); /* window title */
   myinit ();  /* set attributes */
	
   glutCreateMenu(boatMenu);
   glutAddMenuEntry("Toggle Background", 1);
   glutAddMenuEntry("Quit", 2);	
   glutAttachMenu(GLUT_RIGHT_BUTTON);
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape);
   glutKeyboardFunc(keyboard);
   glutMainLoop();
   return 0;
}