void drawScene(GLenum mode)
{

  int nr;
  mexe +=1;

  if(camaraSelect == 0){
    if(camaraAnterior != camaraSelect){
      repoe_camera();
      camaraAnterior = camaraSelect;}
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
    glTranslated(30.0,-30.0,-427.0);
    glRotated(20.0, 1.0,0.0,0.0 );
    glTranslatef( obj_pos[0], obj_pos[1], -obj_pos[2] );
    glMultMatrixf( view_rotate );
  }
    else if(camaraSelect == 1){
        if(camaraAnterior != camaraSelect){
          repoe_camera();
          camaraAnterior = camaraSelect;}
      glMatrixMode( GL_MODELVIEW );
      glLoadIdentity();
      glTranslated(39.5,20.0,-150.0);
      glRotated(90.0, 1.0,0.0,0.0 );
      glTranslatef( obj_pos[0], obj_pos[1], -obj_pos[2] );
      glMultMatrixf( view_rotate );
    }

      else {
        if(camaraAnterior != camaraSelect){
          repoe_camera();
          camaraAnterior = camaraSelect;}
        glMatrixMode( GL_MODELVIEW );
        glLoadIdentity();
        glTranslated(40.0,76.0,-80.0);
        glRotated(90.0, 1.0,0.0,0.0 );
        glTranslatef( obj_pos[0], obj_pos[1], -obj_pos[2] );
        glMultMatrixf( view_rotate );
      }