(chebyshev_client_x_center + i*chebyshev_client_x_step, chebyshev_client_y_center);
        chebyshev_context.lineTo(chebyshev_client_x_center + i*chebyshev_client_x_step, chebyshev_client_y_center - 5);
        chebyshev_context.fillText(i, chebyshev_client_x_center + i*chebyshev_client_x_step + 4, chebyshev_client_y_center + 16);
    }
    for(var i = y_min + 1; i <= y_max - 1; i++){
        chebyshev_context.moveTo(chebyshev_client_x_center, chebyshev_client_y_center - i*chebyshev_client_y_step);
       