Nsryjdtyk

I want to see the movement of the Sphere on the screen.
but, If you run the code, you will not be able to update the screen.
How do I change the code to show a change in the location of the phrase I created?

void display() {

  glLoadIdentity();

  gluLookAt(0, 0, 10, 0, 0, 0, 0, 1, 0);



  GLfloat diffuse1 = { 1.0, 1.0, 1.0, 1.0 };

  GLfloat ambient1 = { 1.0, 1.0, 1.0, 1.0 };

  GLfloat specular1 = { 1.0, 1.0, 1.0, 1.0 };

  GLfloat position1 = { 0, 0, 0, 1.0 };

  GLfloat diffuse2 = { 0.5, 0.5, 0.5, 1 };

  GLfloat ambient2 = { 0.1, 0.1, 0.1, 1 };

  GLfloat specular2 = { 0.5, 0.5, 0.5, 1 };

  GLfloat emission2 = { 0, 0, 0, 1 };

  GLfloat shine = 300;



  glLightfv(GL_LIGHT0, GL_POSITION, position);

  glLightfv(GL_LIGHT0, GL_AMBIENT, ambient1);

  glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse1);

  glLightfv(GL_LIGHT0, GL_SPECULAR, specular1);

  glPushMatrix();

  glMaterialfv(GL_FRONT, GL_AMBIENT, ambient2);

  glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse2);

  glMaterialfv(GL_FRONT, GL_SPECULAR, specular2);

  glMaterialfv(GL_FRONT, GL_EMISSION, emission2);

  glMaterialf(GL_FRONT, GL_SHININESS, shine);

  glRotatef(mer_revolution, 0, 0, 1);

  glTranslatef(0, 0.8, 0);

  glRotatef(mer_rotate, 0, 0, 1);

  glutSolidSphere(1, 300, 300);

  glPopMatrix();

  glFlush();

  }



void main(int argc, char** argv) {

  glutInit(&argc, argv);

  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);

  glutInitWindowSize(800,600);

  glutCreateWindow("");

  glClearColor(0, 0, 0, 0);

  glColor3f(1.0, 1.0, 1.0);

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glEnable(GL_LIGHTING);

  glEnable(GL_LIGHT0);

  glEnable(GL_DEPTH_TEST);

  glDepthFunc(GL_LESS);

  glMatrixMode(GL_MODELVIEW);

  glutDisplayFunc(display);

  glutReshapeFunc(reshape);

  glutIdleFunc(move);

  glutMainLoop();

}

Move 'gL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT' at the top of the display.
The screen must be initialized when performing a function. Only then will the screen continue to change.

There are 2 issues. Of course you have to clear the framebuffer at the begin of every frame glClear. But you have to "tell" the display to be continuously redisplayed, too. ths can be done by glutPostRedisplay.

Further you should incrementally change the angles mer_revolution and mer_rotate to animate the scene:

void display( void )

{ 

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



    ....



    glFlush();

    glutPostRedisplay();



    mer_revolution += 1.0f;

    mer_rotate += 0.5f;

}