void display(void){

    //================================================================= APaga ecran/profundidade
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );


    //================================================================= viewport 1
    glViewport (600, 0, 1000, 500);                             // ESQUECER PoR AGORA
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(angPersp, (float)wScreen/hScreen, 0.1, 100.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  gluLookAt(obsPini[0], obsPini[1], obsPini[2], obsPfin[0], obsPfin[1], obsPfin[2], 0, 1, 0);
                                                // ESQUECER PoR AGORA
                        //desenhar objetos
  //drawChao();
  //drawEixos();
  drawScene();
                                            // ESQUECER PoR AGORA
    //================================================================= view port 2
  glViewport(0,0,600,400);
  glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
  glOrtho(-50,50,-50,50,-50,50);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  gluLookAt(-15,20,0,-15,0,0,0,0,-1);
                                    // ESQUECER PoR AGORA


  //drawEixos();
    drawScene();

  //================================================================= viewport 3
  glViewport (0, 500, 800, 500);                                // ESQUECER PoR AGORA
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(angPersp, (float)wScreen/hScreen, 0.1, 100.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  gluLookAt(-30+obsPini[0], obsPini[1],10+obsPini[2], -15+obsPfin[0], 0+obsPfin[1], 0+obsPfin[2], 0, 1, 0);
                        // ESQUECER PoR AGORA
                        //desenhar objetos

  //drawEixos();
  drawScene();
  //================================================================= viewport 4
  glViewport (800, 500, 800, 500);                              // ESQUECER PoR AGORA
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(angPersp, (float)wScreen/hScreen, 0.1, 100.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  gluLookAt(5+obsPini[0], obsPini[1],10+obsPini[2], -15+obsPfin[0], 0+obsPfin[1], 0+obsPfin[2], 0, 1, 0);
                        // ESQUECER PoR AGORA
                        //desenhar objetos

  //drawEixos();
  drawScene();

    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Actualizacao
    glutSwapBuffers();

}