[graph-tool] Fixed vertex size between different layouts

Hello,

I am trying to plot a few networks using two different layouts. The vertex sizes and edge width are calculated separately, then each networks is plotted using two different layouts: radial tree layout and sfdp layout. In both cases the same pre-calculated values are used to set the vertex sizes and edge width, in order to maintain the comparability of the plots. However, I end up with different vertex sizes and edge width in function of the chosen layout. I am using the cairo backend, so I can plot both layouts next to each other, but the ax sizes are the exactly the same. Can you please help me how can I sort this out?

Thank you in advance, Botond