void MazeWidget::keyPressEvent(QKeyEvent * event)
{
    switch(event->key())
    {
        case Qt::Key_Up:
        {
            x += lx * movement;
            z += lz * movement;
            gluLookAt(x, 2.0, z, x+lx, 2.0+ly, z+lz, 0.0, 1.0, 0.0);
            break;
        }


        case Qt::Key_Down:
        {
            x -= lx * movement;
            z -= lz * movement;
            gluLookAt(x, 2.0, z, x+lx, 2.0+ly, z+lz, 0.0, 1.0, 0.0);
            break;
        }

        case Qt::Key_Left:
        {
            angle -= 0.05;
            lx = sin(angle);
            lz = -cos(angle);
            gluLookAt(x, 2.0, z, x+lx, 2.0+ly, z+lz, 0.0, 1.0, 0.0);
            break;
        }

        case Qt::Key_Right:
        {
            angle += 0.05;
            lx = sin(angle);
            lz = -cos(angle);
            gluLookAt(x, 2.0, z, x+lx, 2.0+ly, z+lz, 0.0, 1.0, 0.0);
            break;
        }


        // Sortie de l'application
        case Qt::Key_Escape:
        {
            exit(0);
        }
        break;

        // Cas par defaut
        default:
        {
            // Ignorer l'evenement
            event->ignore();
            return;
        }
    }

    // Acceptation de l'evenement et mise a jour de la scene
    event->accept();
    updateGL();
}


float movement = 1.0;

float angle=0.0;

float lx=1.0f,lz=1.0f,ly = 0.0 ;

float x=3.0f,z=3.0f;