신나게 개발하기

#include 
#include 

static GLfloat spin = 0.0;

void display(void)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glPushMatrix();
   glRotatef(spin, 0.0, 0.0, 0.1);
   glColor3f(1.0, 1.0, 1.0);
   glColor3f(1.0, 1.0, 1.0);
      glBegin(GL_POLYGON);
      glVertex3f (11.25, 11.25, 0.0);
      glVertex3f (93.75, 11.25, 0.0);
      glVertex3f (93.75, 11.75, 0.0);
      glVertex3f (11.25, 11.75, 0.0);
   glEnd();
   glPopMatrix(); 
   
   glColor3f(1.0, 1.0, 1.0);
      glBegin(GL_POLYGON);
      glVertex3f (9.25, 0.25, 0.0);
      glVertex3f (93.75, 0.25, 0.0);
      glVertex3f (93.75, 0.75, 0.0);
      glVertex3f (0.25, 0.75, 0.0);
   glEnd();
 
   glutSwapBuffers();
}

void spinDisplay(void)
{
   spin = spin + 2.0;
   if (spin > 360.0)
      spin = spin - 360.0;
   glutPostRedisplay();
}
void spinDisplay2(void)
{
   spin = spin + 5.0;
   if (spin > 360.0)
      spin = spin - 360.0;
   glutPostRedisplay();
}


void init(void) 
{
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel (GL_FLAT);
}

void reshape(int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

void mouse(int button, int state, int x, int y) 
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(spinDisplay);
         break;
      case GLUT_MIDDLE_BUTTON:
		  glutIdleFunc(spinDisplay2);
         break;
      case GLUT_RIGHT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(NULL);
         break;
      default:
         break;
   }
}
   
/* 
 *  Request double buffer display mode.
 *  Register mouse input callback functions
 */
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
   glutInitWindowSize (250, 250); 
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   init ();
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape); 
   glutMouseFunc(mouse);
   glutMainLoop();
   return 0;   
}