/*
 *  Program 1, Create OpenGL context with GLUT
 *
 *
 *
 */

 #include <windows.h>
 #include <GL/glut.h>
 #include <stdio.h>
 #include <stdlib.h>

void init ( void )
{
   glEnable     ( GL_DEPTH_TEST );
   glClearColor ( 0.0, 0.0, 0.0, 0.0 );
}

void display ( void )
{
   glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
   glPushMatrix ( );
   glPopMatrix  ( );
   glutSwapBuffers ( );
}

void reshape(int w, int h)
{
   glViewport     ( 0, 0, w, h );
   glMatrixMode   ( GL_PROJECTION );
   glLoadIdentity ( );
   if ( h==0 )
      gluPerspective ( 80, ( float ) w, 1.0, 5000.0 );
   else
      gluPerspective ( 80, ( float ) w / ( float ) h, 1.0, 5000.0 );
   glMatrixMode   ( GL_MODELVIEW );
   glLoadIdentity ( );

}


#pragma argsused
void keyboard ( unsigned char key, int x, int y )
{
   switch ( key ) {
      case 27:  /*  Escape key  */
         exit ( 0 );
         break;
      case 'f':
         glutFullScreen ( );
         break;
      case 'w':
         glutReshapeWindow ( 250,250 );
         break;
      default:
         break;
   }
}

/*  Main Loop
 *  Open window with initial window size, title bar,
 *  RGBA display mode, and handle input events.
 */
int main ( int argc, char** argv )
{
   glutInit ( &argc, argv );
   glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE );
   glutInitWindowSize  ( 250, 250 );
   glutCreateWindow    ( argv[0]  );
   init ( );
   glutReshapeFunc     ( reshape  );
   glutKeyboardFunc    ( keyboard );
   glutDisplayFunc     ( display  );
   glutMainLoop        ( );
   return 0;
}